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 = 0;
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) {
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 (priv->pending_tx_pkts < oldcount) {
1583                         wiphy_notice(hw->wiphy,
1584                                      "waiting for tx rings to drain (%d -> %d pkts)\n",
1585                                      oldcount, priv->pending_tx_pkts);
1586                         retry = 1;
1587                         continue;
1588                 }
1589
1590                 priv->tx_wait = NULL;
1591
1592                 wiphy_err(hw->wiphy, "tx rings stuck for %d ms\n",
1593                           MWL8K_TX_WAIT_TIMEOUT_MS);
1594                 mwl8k_dump_tx_rings(hw);
1595                 priv->hw_restart_in_progress = true;
1596                 ieee80211_queue_work(hw, &priv->fw_reload);
1597
1598                 rc = -ETIMEDOUT;
1599         }
1600         priv->tx_wait = NULL;
1601         spin_unlock_bh(&priv->tx_lock);
1602
1603         return rc;
1604 }
1605
1606 #define MWL8K_TXD_SUCCESS(status)                               \
1607         ((status) & (MWL8K_TXD_STATUS_OK |                      \
1608                      MWL8K_TXD_STATUS_OK_RETRY |                \
1609                      MWL8K_TXD_STATUS_OK_MORE_RETRY))
1610
1611 static int mwl8k_tid_queue_mapping(u8 tid)
1612 {
1613         BUG_ON(tid > 7);
1614
1615         switch (tid) {
1616         case 0:
1617         case 3:
1618                 return IEEE80211_AC_BE;
1619                 break;
1620         case 1:
1621         case 2:
1622                 return IEEE80211_AC_BK;
1623                 break;
1624         case 4:
1625         case 5:
1626                 return IEEE80211_AC_VI;
1627                 break;
1628         case 6:
1629         case 7:
1630                 return IEEE80211_AC_VO;
1631                 break;
1632         default:
1633                 return -1;
1634                 break;
1635         }
1636 }
1637
1638 /* The firmware will fill in the rate information
1639  * for each packet that gets queued in the hardware
1640  * and these macros will interpret that info.
1641  */
1642
1643 #define RI_FORMAT(a)              (a & 0x0001)
1644 #define RI_RATE_ID_MCS(a)        ((a & 0x01f8) >> 3)
1645
1646 static int
1647 mwl8k_txq_reclaim(struct ieee80211_hw *hw, int index, int limit, int force)
1648 {
1649         struct mwl8k_priv *priv = hw->priv;
1650         struct mwl8k_tx_queue *txq = priv->txq + index;
1651         int processed;
1652
1653         processed = 0;
1654         while (txq->len > 0 && limit--) {
1655                 int tx;
1656                 struct mwl8k_tx_desc *tx_desc;
1657                 unsigned long addr;
1658                 int size;
1659                 struct sk_buff *skb;
1660                 struct ieee80211_tx_info *info;
1661                 u32 status;
1662                 struct ieee80211_sta *sta;
1663                 struct mwl8k_sta *sta_info = NULL;
1664                 u16 rate_info;
1665                 struct ieee80211_hdr *wh;
1666
1667                 tx = txq->head;
1668                 tx_desc = txq->txd + tx;
1669
1670                 status = le32_to_cpu(tx_desc->status);
1671
1672                 if (status & MWL8K_TXD_STATUS_FW_OWNED) {
1673                         if (!force)
1674                                 break;
1675                         tx_desc->status &=
1676                                 ~cpu_to_le32(MWL8K_TXD_STATUS_FW_OWNED);
1677                 }
1678
1679                 txq->head = (tx + 1) % MWL8K_TX_DESCS;
1680                 BUG_ON(txq->len == 0);
1681                 txq->len--;
1682                 priv->pending_tx_pkts--;
1683
1684                 addr = le32_to_cpu(tx_desc->pkt_phys_addr);
1685                 size = le16_to_cpu(tx_desc->pkt_len);
1686                 skb = txq->skb[tx];
1687                 txq->skb[tx] = NULL;
1688
1689                 BUG_ON(skb == NULL);
1690                 pci_unmap_single(priv->pdev, addr, size, PCI_DMA_TODEVICE);
1691
1692                 mwl8k_remove_dma_header(skb, tx_desc->qos_control);
1693
1694                 wh = (struct ieee80211_hdr *) skb->data;
1695
1696                 /* Mark descriptor as unused */
1697                 tx_desc->pkt_phys_addr = 0;
1698                 tx_desc->pkt_len = 0;
1699
1700                 info = IEEE80211_SKB_CB(skb);
1701                 if (ieee80211_is_data(wh->frame_control)) {
1702                         rcu_read_lock();
1703                         sta = ieee80211_find_sta_by_ifaddr(hw, wh->addr1,
1704                                                            wh->addr2);
1705                         if (sta) {
1706                                 sta_info = MWL8K_STA(sta);
1707                                 BUG_ON(sta_info == NULL);
1708                                 rate_info = le16_to_cpu(tx_desc->rate_info);
1709                                 /* If rate is < 6.5 Mpbs for an ht station
1710                                  * do not form an ampdu. If the station is a
1711                                  * legacy station (format = 0), do not form an
1712                                  * ampdu
1713                                  */
1714                                 if (RI_RATE_ID_MCS(rate_info) < 1 ||
1715                                     RI_FORMAT(rate_info) == 0) {
1716                                         sta_info->is_ampdu_allowed = false;
1717                                 } else {
1718                                         sta_info->is_ampdu_allowed = true;
1719                                 }
1720                         }
1721                         rcu_read_unlock();
1722                 }
1723
1724                 ieee80211_tx_info_clear_status(info);
1725
1726                 /* Rate control is happening in the firmware.
1727                  * Ensure no tx rate is being reported.
1728                  */
1729                 info->status.rates[0].idx = -1;
1730                 info->status.rates[0].count = 1;
1731
1732                 if (MWL8K_TXD_SUCCESS(status))
1733                         info->flags |= IEEE80211_TX_STAT_ACK;
1734
1735                 ieee80211_tx_status_irqsafe(hw, skb);
1736
1737                 processed++;
1738         }
1739
1740         return processed;
1741 }
1742
1743 /* must be called only when the card's transmit is completely halted */
1744 static void mwl8k_txq_deinit(struct ieee80211_hw *hw, int index)
1745 {
1746         struct mwl8k_priv *priv = hw->priv;
1747         struct mwl8k_tx_queue *txq = priv->txq + index;
1748
1749         if (txq->txd == NULL)
1750                 return;
1751
1752         mwl8k_txq_reclaim(hw, index, INT_MAX, 1);
1753
1754         kfree(txq->skb);
1755         txq->skb = NULL;
1756
1757         pci_free_consistent(priv->pdev,
1758                             MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc),
1759                             txq->txd, txq->txd_dma);
1760         txq->txd = NULL;
1761 }
1762
1763 /* caller must hold priv->stream_lock when calling the stream functions */
1764 static struct mwl8k_ampdu_stream *
1765 mwl8k_add_stream(struct ieee80211_hw *hw, struct ieee80211_sta *sta, u8 tid)
1766 {
1767         struct mwl8k_ampdu_stream *stream;
1768         struct mwl8k_priv *priv = hw->priv;
1769         int i;
1770
1771         for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
1772                 stream = &priv->ampdu[i];
1773                 if (stream->state == AMPDU_NO_STREAM) {
1774                         stream->sta = sta;
1775                         stream->state = AMPDU_STREAM_NEW;
1776                         stream->tid = tid;
1777                         stream->idx = i;
1778                         wiphy_debug(hw->wiphy, "Added a new stream for %pM %d",
1779                                     sta->addr, tid);
1780                         return stream;
1781                 }
1782         }
1783         return NULL;
1784 }
1785
1786 static int
1787 mwl8k_start_stream(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream)
1788 {
1789         int ret;
1790
1791         /* if the stream has already been started, don't start it again */
1792         if (stream->state != AMPDU_STREAM_NEW)
1793                 return 0;
1794         ret = ieee80211_start_tx_ba_session(stream->sta, stream->tid, 0);
1795         if (ret)
1796                 wiphy_debug(hw->wiphy, "Failed to start stream for %pM %d: "
1797                             "%d\n", stream->sta->addr, stream->tid, ret);
1798         else
1799                 wiphy_debug(hw->wiphy, "Started stream for %pM %d\n",
1800                             stream->sta->addr, stream->tid);
1801         return ret;
1802 }
1803
1804 static void
1805 mwl8k_remove_stream(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream)
1806 {
1807         wiphy_debug(hw->wiphy, "Remove stream for %pM %d\n", stream->sta->addr,
1808                     stream->tid);
1809         memset(stream, 0, sizeof(*stream));
1810 }
1811
1812 static struct mwl8k_ampdu_stream *
1813 mwl8k_lookup_stream(struct ieee80211_hw *hw, u8 *addr, u8 tid)
1814 {
1815         struct mwl8k_priv *priv = hw->priv;
1816         int i;
1817
1818         for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
1819                 struct mwl8k_ampdu_stream *stream;
1820                 stream = &priv->ampdu[i];
1821                 if (stream->state == AMPDU_NO_STREAM)
1822                         continue;
1823                 if (!memcmp(stream->sta->addr, addr, ETH_ALEN) &&
1824                     stream->tid == tid)
1825                         return stream;
1826         }
1827         return NULL;
1828 }
1829
1830 #define MWL8K_AMPDU_PACKET_THRESHOLD 64
1831 static inline bool mwl8k_ampdu_allowed(struct ieee80211_sta *sta, u8 tid)
1832 {
1833         struct mwl8k_sta *sta_info = MWL8K_STA(sta);
1834         struct tx_traffic_info *tx_stats;
1835
1836         BUG_ON(tid >= MWL8K_MAX_TID);
1837         tx_stats = &sta_info->tx_stats[tid];
1838
1839         return sta_info->is_ampdu_allowed &&
1840                 tx_stats->pkts > MWL8K_AMPDU_PACKET_THRESHOLD;
1841 }
1842
1843 static inline void mwl8k_tx_count_packet(struct ieee80211_sta *sta, u8 tid)
1844 {
1845         struct mwl8k_sta *sta_info = MWL8K_STA(sta);
1846         struct tx_traffic_info *tx_stats;
1847
1848         BUG_ON(tid >= MWL8K_MAX_TID);
1849         tx_stats = &sta_info->tx_stats[tid];
1850
1851         if (tx_stats->start_time == 0)
1852                 tx_stats->start_time = jiffies;
1853
1854         /* reset the packet count after each second elapses.  If the number of
1855          * packets ever exceeds the ampdu_min_traffic threshold, we will allow
1856          * an ampdu stream to be started.
1857          */
1858         if (jiffies - tx_stats->start_time > HZ) {
1859                 tx_stats->pkts = 0;
1860                 tx_stats->start_time = 0;
1861         } else
1862                 tx_stats->pkts++;
1863 }
1864
1865 /* The hardware ampdu queues start from 5.
1866  * txpriorities for ampdu queues are
1867  * 5 6 7 0 1 2 3 4 ie., queue 5 is highest
1868  * and queue 3 is lowest (queue 4 is reserved)
1869  */
1870 #define BA_QUEUE                5
1871
1872 static void
1873 mwl8k_txq_xmit(struct ieee80211_hw *hw,
1874                int index,
1875                struct ieee80211_sta *sta,
1876                struct sk_buff *skb)
1877 {
1878         struct mwl8k_priv *priv = hw->priv;
1879         struct ieee80211_tx_info *tx_info;
1880         struct mwl8k_vif *mwl8k_vif;
1881         struct ieee80211_hdr *wh;
1882         struct mwl8k_tx_queue *txq;
1883         struct mwl8k_tx_desc *tx;
1884         dma_addr_t dma;
1885         u32 txstatus;
1886         u8 txdatarate;
1887         u16 qos;
1888         int txpriority;
1889         u8 tid = 0;
1890         struct mwl8k_ampdu_stream *stream = NULL;
1891         bool start_ba_session = false;
1892         bool mgmtframe = false;
1893         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
1894         bool eapol_frame = false;
1895
1896         wh = (struct ieee80211_hdr *)skb->data;
1897         if (ieee80211_is_data_qos(wh->frame_control))
1898                 qos = le16_to_cpu(*((__le16 *)ieee80211_get_qos_ctl(wh)));
1899         else
1900                 qos = 0;
1901
1902         if (skb->protocol == cpu_to_be16(ETH_P_PAE))
1903                 eapol_frame = true;
1904
1905         if (ieee80211_is_mgmt(wh->frame_control))
1906                 mgmtframe = true;
1907
1908         if (priv->ap_fw)
1909                 mwl8k_encapsulate_tx_frame(priv, skb);
1910         else
1911                 mwl8k_add_dma_header(priv, skb, 0, 0);
1912
1913         wh = &((struct mwl8k_dma_data *)skb->data)->wh;
1914
1915         tx_info = IEEE80211_SKB_CB(skb);
1916         mwl8k_vif = MWL8K_VIF(tx_info->control.vif);
1917
1918         if (tx_info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
1919                 wh->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1920                 wh->seq_ctrl |= cpu_to_le16(mwl8k_vif->seqno);
1921                 mwl8k_vif->seqno += 0x10;
1922         }
1923
1924         /* Setup firmware control bit fields for each frame type.  */
1925         txstatus = 0;
1926         txdatarate = 0;
1927         if (ieee80211_is_mgmt(wh->frame_control) ||
1928             ieee80211_is_ctl(wh->frame_control)) {
1929                 txdatarate = 0;
1930                 qos |= MWL8K_QOS_QLEN_UNSPEC | MWL8K_QOS_EOSP;
1931         } else if (ieee80211_is_data(wh->frame_control)) {
1932                 txdatarate = 1;
1933                 if (is_multicast_ether_addr(wh->addr1))
1934                         txstatus |= MWL8K_TXD_STATUS_MULTICAST_TX;
1935
1936                 qos &= ~MWL8K_QOS_ACK_POLICY_MASK;
1937                 if (tx_info->flags & IEEE80211_TX_CTL_AMPDU)
1938                         qos |= MWL8K_QOS_ACK_POLICY_BLOCKACK;
1939                 else
1940                         qos |= MWL8K_QOS_ACK_POLICY_NORMAL;
1941         }
1942
1943         /* Queue ADDBA request in the respective data queue.  While setting up
1944          * the ampdu stream, mac80211 queues further packets for that
1945          * particular ra/tid pair.  However, packets piled up in the hardware
1946          * for that ra/tid pair will still go out. ADDBA request and the
1947          * related data packets going out from different queues asynchronously
1948          * will cause a shift in the receiver window which might result in
1949          * ampdu packets getting dropped at the receiver after the stream has
1950          * been setup.
1951          */
1952         if (unlikely(ieee80211_is_action(wh->frame_control) &&
1953             mgmt->u.action.category == WLAN_CATEGORY_BACK &&
1954             mgmt->u.action.u.addba_req.action_code == WLAN_ACTION_ADDBA_REQ &&
1955             priv->ap_fw)) {
1956                 u16 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1957                 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1958                 index = mwl8k_tid_queue_mapping(tid);
1959         }
1960
1961         txpriority = index;
1962
1963         if (priv->ap_fw && sta && sta->ht_cap.ht_supported && !eapol_frame &&
1964             ieee80211_is_data_qos(wh->frame_control)) {
1965                 tid = qos & 0xf;
1966                 mwl8k_tx_count_packet(sta, tid);
1967                 spin_lock(&priv->stream_lock);
1968                 stream = mwl8k_lookup_stream(hw, sta->addr, tid);
1969                 if (stream != NULL) {
1970                         if (stream->state == AMPDU_STREAM_ACTIVE) {
1971                                 WARN_ON(!(qos & MWL8K_QOS_ACK_POLICY_BLOCKACK));
1972                                 txpriority = (BA_QUEUE + stream->idx) %
1973                                              TOTAL_HW_TX_QUEUES;
1974                                 if (stream->idx <= 1)
1975                                         index = stream->idx +
1976                                                 MWL8K_TX_WMM_QUEUES;
1977
1978                         } else if (stream->state == AMPDU_STREAM_NEW) {
1979                                 /* We get here if the driver sends us packets
1980                                  * after we've initiated a stream, but before
1981                                  * our ampdu_action routine has been called
1982                                  * with IEEE80211_AMPDU_TX_START to get the SSN
1983                                  * for the ADDBA request.  So this packet can
1984                                  * go out with no risk of sequence number
1985                                  * mismatch.  No special handling is required.
1986                                  */
1987                         } else {
1988                                 /* Drop packets that would go out after the
1989                                  * ADDBA request was sent but before the ADDBA
1990                                  * response is received.  If we don't do this,
1991                                  * the recipient would probably receive it
1992                                  * after the ADDBA request with SSN 0.  This
1993                                  * will cause the recipient's BA receive window
1994                                  * to shift, which would cause the subsequent
1995                                  * packets in the BA stream to be discarded.
1996                                  * mac80211 queues our packets for us in this
1997                                  * case, so this is really just a safety check.
1998                                  */
1999                                 wiphy_warn(hw->wiphy,
2000                                            "Cannot send packet while ADDBA "
2001                                            "dialog is underway.\n");
2002                                 spin_unlock(&priv->stream_lock);
2003                                 dev_kfree_skb(skb);
2004                                 return;
2005                         }
2006                 } else {
2007                         /* Defer calling mwl8k_start_stream so that the current
2008                          * skb can go out before the ADDBA request.  This
2009                          * prevents sequence number mismatch at the recepient
2010                          * as described above.
2011                          */
2012                         if (mwl8k_ampdu_allowed(sta, tid)) {
2013                                 stream = mwl8k_add_stream(hw, sta, tid);
2014                                 if (stream != NULL)
2015                                         start_ba_session = true;
2016                         }
2017                 }
2018                 spin_unlock(&priv->stream_lock);
2019         } else {
2020                 qos &= ~MWL8K_QOS_ACK_POLICY_MASK;
2021                 qos |= MWL8K_QOS_ACK_POLICY_NORMAL;
2022         }
2023
2024         dma = pci_map_single(priv->pdev, skb->data,
2025                                 skb->len, PCI_DMA_TODEVICE);
2026
2027         if (pci_dma_mapping_error(priv->pdev, dma)) {
2028                 wiphy_debug(hw->wiphy,
2029                             "failed to dma map skb, dropping TX frame.\n");
2030                 if (start_ba_session) {
2031                         spin_lock(&priv->stream_lock);
2032                         mwl8k_remove_stream(hw, stream);
2033                         spin_unlock(&priv->stream_lock);
2034                 }
2035                 dev_kfree_skb(skb);
2036                 return;
2037         }
2038
2039         spin_lock_bh(&priv->tx_lock);
2040
2041         txq = priv->txq + index;
2042
2043         /* Mgmt frames that go out frequently are probe
2044          * responses. Other mgmt frames got out relatively
2045          * infrequently. Hence reserve 2 buffers so that
2046          * other mgmt frames do not get dropped due to an
2047          * already queued probe response in one of the
2048          * reserved buffers.
2049          */
2050
2051         if (txq->len >= MWL8K_TX_DESCS - 2) {
2052                 if (!mgmtframe || txq->len == MWL8K_TX_DESCS) {
2053                         if (start_ba_session) {
2054                                 spin_lock(&priv->stream_lock);
2055                                 mwl8k_remove_stream(hw, stream);
2056                                 spin_unlock(&priv->stream_lock);
2057                         }
2058                         spin_unlock_bh(&priv->tx_lock);
2059                         pci_unmap_single(priv->pdev, dma, skb->len,
2060                                          PCI_DMA_TODEVICE);
2061                         dev_kfree_skb(skb);
2062                         return;
2063                 }
2064         }
2065
2066         BUG_ON(txq->skb[txq->tail] != NULL);
2067         txq->skb[txq->tail] = skb;
2068
2069         tx = txq->txd + txq->tail;
2070         tx->data_rate = txdatarate;
2071         tx->tx_priority = txpriority;
2072         tx->qos_control = cpu_to_le16(qos);
2073         tx->pkt_phys_addr = cpu_to_le32(dma);
2074         tx->pkt_len = cpu_to_le16(skb->len);
2075         tx->rate_info = 0;
2076         if (!priv->ap_fw && sta != NULL)
2077                 tx->peer_id = MWL8K_STA(sta)->peer_id;
2078         else
2079                 tx->peer_id = 0;
2080
2081         if (priv->ap_fw && ieee80211_is_data(wh->frame_control) && !eapol_frame)
2082                 tx->timestamp = cpu_to_le32(ioread32(priv->regs +
2083                                                 MWL8K_HW_TIMER_REGISTER));
2084         else
2085                 tx->timestamp = 0;
2086
2087         wmb();
2088         tx->status = cpu_to_le32(MWL8K_TXD_STATUS_FW_OWNED | txstatus);
2089
2090         txq->len++;
2091         priv->pending_tx_pkts++;
2092
2093         txq->tail++;
2094         if (txq->tail == MWL8K_TX_DESCS)
2095                 txq->tail = 0;
2096
2097         mwl8k_tx_start(priv);
2098
2099         spin_unlock_bh(&priv->tx_lock);
2100
2101         /* Initiate the ampdu session here */
2102         if (start_ba_session) {
2103                 spin_lock(&priv->stream_lock);
2104                 if (mwl8k_start_stream(hw, stream))
2105                         mwl8k_remove_stream(hw, stream);
2106                 spin_unlock(&priv->stream_lock);
2107         }
2108 }
2109
2110
2111 /*
2112  * Firmware access.
2113  *
2114  * We have the following requirements for issuing firmware commands:
2115  * - Some commands require that the packet transmit path is idle when
2116  *   the command is issued.  (For simplicity, we'll just quiesce the
2117  *   transmit path for every command.)
2118  * - There are certain sequences of commands that need to be issued to
2119  *   the hardware sequentially, with no other intervening commands.
2120  *
2121  * This leads to an implementation of a "firmware lock" as a mutex that
2122  * can be taken recursively, and which is taken by both the low-level
2123  * command submission function (mwl8k_post_cmd) as well as any users of
2124  * that function that require issuing of an atomic sequence of commands,
2125  * and quiesces the transmit path whenever it's taken.
2126  */
2127 static int mwl8k_fw_lock(struct ieee80211_hw *hw)
2128 {
2129         struct mwl8k_priv *priv = hw->priv;
2130
2131         if (priv->fw_mutex_owner != current) {
2132                 int rc;
2133
2134                 mutex_lock(&priv->fw_mutex);
2135                 ieee80211_stop_queues(hw);
2136
2137                 rc = mwl8k_tx_wait_empty(hw);
2138                 if (rc) {
2139                         if (!priv->hw_restart_in_progress)
2140                                 ieee80211_wake_queues(hw);
2141
2142                         mutex_unlock(&priv->fw_mutex);
2143
2144                         return rc;
2145                 }
2146
2147                 priv->fw_mutex_owner = current;
2148         }
2149
2150         priv->fw_mutex_depth++;
2151
2152         return 0;
2153 }
2154
2155 static void mwl8k_fw_unlock(struct ieee80211_hw *hw)
2156 {
2157         struct mwl8k_priv *priv = hw->priv;
2158
2159         if (!--priv->fw_mutex_depth) {
2160                 if (!priv->hw_restart_in_progress)
2161                         ieee80211_wake_queues(hw);
2162
2163                 priv->fw_mutex_owner = NULL;
2164                 mutex_unlock(&priv->fw_mutex);
2165         }
2166 }
2167
2168 static void mwl8k_enable_bsses(struct ieee80211_hw *hw, bool enable,
2169                                u32 bitmap);
2170
2171 /*
2172  * Command processing.
2173  */
2174
2175 /* Timeout firmware commands after 10s */
2176 #define MWL8K_CMD_TIMEOUT_MS    10000
2177
2178 static int mwl8k_post_cmd(struct ieee80211_hw *hw, struct mwl8k_cmd_pkt *cmd)
2179 {
2180         DECLARE_COMPLETION_ONSTACK(cmd_wait);
2181         struct mwl8k_priv *priv = hw->priv;
2182         void __iomem *regs = priv->regs;
2183         dma_addr_t dma_addr;
2184         unsigned int dma_size;
2185         int rc;
2186         unsigned long timeout = 0;
2187         u8 buf[32];
2188         u32 bitmap = 0;
2189
2190         wiphy_dbg(hw->wiphy, "Posting %s [%d]\n",
2191                   mwl8k_cmd_name(cmd->code, buf, sizeof(buf)), cmd->macid);
2192
2193         /* Before posting firmware commands that could change the hardware
2194          * characteristics, make sure that all BSSes are stopped temporary.
2195          * Enable these stopped BSSes after completion of the commands
2196          */
2197
2198         rc = mwl8k_fw_lock(hw);
2199         if (rc)
2200                 return rc;
2201
2202         if (priv->ap_fw && priv->running_bsses) {
2203                 switch (le16_to_cpu(cmd->code)) {
2204                 case MWL8K_CMD_SET_RF_CHANNEL:
2205                 case MWL8K_CMD_RADIO_CONTROL:
2206                 case MWL8K_CMD_RF_TX_POWER:
2207                 case MWL8K_CMD_TX_POWER:
2208                 case MWL8K_CMD_RF_ANTENNA:
2209                 case MWL8K_CMD_RTS_THRESHOLD:
2210                 case MWL8K_CMD_MIMO_CONFIG:
2211                         bitmap = priv->running_bsses;
2212                         mwl8k_enable_bsses(hw, false, bitmap);
2213                         break;
2214                 }
2215         }
2216
2217         cmd->result = (__force __le16) 0xffff;
2218         dma_size = le16_to_cpu(cmd->length);
2219         dma_addr = pci_map_single(priv->pdev, cmd, dma_size,
2220                                   PCI_DMA_BIDIRECTIONAL);
2221         if (pci_dma_mapping_error(priv->pdev, dma_addr))
2222                 return -ENOMEM;
2223
2224         priv->hostcmd_wait = &cmd_wait;
2225         iowrite32(dma_addr, regs + MWL8K_HIU_GEN_PTR);
2226         iowrite32(MWL8K_H2A_INT_DOORBELL,
2227                 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
2228         iowrite32(MWL8K_H2A_INT_DUMMY,
2229                 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
2230
2231         timeout = wait_for_completion_timeout(&cmd_wait,
2232                                 msecs_to_jiffies(MWL8K_CMD_TIMEOUT_MS));
2233
2234         priv->hostcmd_wait = NULL;
2235
2236
2237         pci_unmap_single(priv->pdev, dma_addr, dma_size,
2238                                         PCI_DMA_BIDIRECTIONAL);
2239
2240         if (!timeout) {
2241                 wiphy_err(hw->wiphy, "Command %s timeout after %u ms\n",
2242                           mwl8k_cmd_name(cmd->code, buf, sizeof(buf)),
2243                           MWL8K_CMD_TIMEOUT_MS);
2244                 rc = -ETIMEDOUT;
2245         } else {
2246                 int ms;
2247
2248                 ms = MWL8K_CMD_TIMEOUT_MS - jiffies_to_msecs(timeout);
2249
2250                 rc = cmd->result ? -EINVAL : 0;
2251                 if (rc)
2252                         wiphy_err(hw->wiphy, "Command %s error 0x%x\n",
2253                                   mwl8k_cmd_name(cmd->code, buf, sizeof(buf)),
2254                                   le16_to_cpu(cmd->result));
2255                 else if (ms > 2000)
2256                         wiphy_notice(hw->wiphy, "Command %s took %d ms\n",
2257                                      mwl8k_cmd_name(cmd->code,
2258                                                     buf, sizeof(buf)),
2259                                      ms);
2260         }
2261
2262         if (bitmap)
2263                 mwl8k_enable_bsses(hw, true, bitmap);
2264
2265         mwl8k_fw_unlock(hw);
2266
2267         return rc;
2268 }
2269
2270 static int mwl8k_post_pervif_cmd(struct ieee80211_hw *hw,
2271                                  struct ieee80211_vif *vif,
2272                                  struct mwl8k_cmd_pkt *cmd)
2273 {
2274         if (vif != NULL)
2275                 cmd->macid = MWL8K_VIF(vif)->macid;
2276         return mwl8k_post_cmd(hw, cmd);
2277 }
2278
2279 /*
2280  * Setup code shared between STA and AP firmware images.
2281  */
2282 static void mwl8k_setup_2ghz_band(struct ieee80211_hw *hw)
2283 {
2284         struct mwl8k_priv *priv = hw->priv;
2285
2286         BUILD_BUG_ON(sizeof(priv->channels_24) != sizeof(mwl8k_channels_24));
2287         memcpy(priv->channels_24, mwl8k_channels_24, sizeof(mwl8k_channels_24));
2288
2289         BUILD_BUG_ON(sizeof(priv->rates_24) != sizeof(mwl8k_rates_24));
2290         memcpy(priv->rates_24, mwl8k_rates_24, sizeof(mwl8k_rates_24));
2291
2292         priv->band_24.band = IEEE80211_BAND_2GHZ;
2293         priv->band_24.channels = priv->channels_24;
2294         priv->band_24.n_channels = ARRAY_SIZE(mwl8k_channels_24);
2295         priv->band_24.bitrates = priv->rates_24;
2296         priv->band_24.n_bitrates = ARRAY_SIZE(mwl8k_rates_24);
2297
2298         hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &priv->band_24;
2299 }
2300
2301 static void mwl8k_setup_5ghz_band(struct ieee80211_hw *hw)
2302 {
2303         struct mwl8k_priv *priv = hw->priv;
2304
2305         BUILD_BUG_ON(sizeof(priv->channels_50) != sizeof(mwl8k_channels_50));
2306         memcpy(priv->channels_50, mwl8k_channels_50, sizeof(mwl8k_channels_50));
2307
2308         BUILD_BUG_ON(sizeof(priv->rates_50) != sizeof(mwl8k_rates_50));
2309         memcpy(priv->rates_50, mwl8k_rates_50, sizeof(mwl8k_rates_50));
2310
2311         priv->band_50.band = IEEE80211_BAND_5GHZ;
2312         priv->band_50.channels = priv->channels_50;
2313         priv->band_50.n_channels = ARRAY_SIZE(mwl8k_channels_50);
2314         priv->band_50.bitrates = priv->rates_50;
2315         priv->band_50.n_bitrates = ARRAY_SIZE(mwl8k_rates_50);
2316
2317         hw->wiphy->bands[IEEE80211_BAND_5GHZ] = &priv->band_50;
2318 }
2319
2320 /*
2321  * CMD_GET_HW_SPEC (STA version).
2322  */
2323 struct mwl8k_cmd_get_hw_spec_sta {
2324         struct mwl8k_cmd_pkt header;
2325         __u8 hw_rev;
2326         __u8 host_interface;
2327         __le16 num_mcaddrs;
2328         __u8 perm_addr[ETH_ALEN];
2329         __le16 region_code;
2330         __le32 fw_rev;
2331         __le32 ps_cookie;
2332         __le32 caps;
2333         __u8 mcs_bitmap[16];
2334         __le32 rx_queue_ptr;
2335         __le32 num_tx_queues;
2336         __le32 tx_queue_ptrs[MWL8K_TX_WMM_QUEUES];
2337         __le32 caps2;
2338         __le32 num_tx_desc_per_queue;
2339         __le32 total_rxd;
2340 } __packed;
2341
2342 #define MWL8K_CAP_MAX_AMSDU             0x20000000
2343 #define MWL8K_CAP_GREENFIELD            0x08000000
2344 #define MWL8K_CAP_AMPDU                 0x04000000
2345 #define MWL8K_CAP_RX_STBC               0x01000000
2346 #define MWL8K_CAP_TX_STBC               0x00800000
2347 #define MWL8K_CAP_SHORTGI_40MHZ         0x00400000
2348 #define MWL8K_CAP_SHORTGI_20MHZ         0x00200000
2349 #define MWL8K_CAP_RX_ANTENNA_MASK       0x000e0000
2350 #define MWL8K_CAP_TX_ANTENNA_MASK       0x0001c000
2351 #define MWL8K_CAP_DELAY_BA              0x00003000
2352 #define MWL8K_CAP_MIMO                  0x00000200
2353 #define MWL8K_CAP_40MHZ                 0x00000100
2354 #define MWL8K_CAP_BAND_MASK             0x00000007
2355 #define MWL8K_CAP_5GHZ                  0x00000004
2356 #define MWL8K_CAP_2GHZ4                 0x00000001
2357
2358 static void
2359 mwl8k_set_ht_caps(struct ieee80211_hw *hw,
2360                   struct ieee80211_supported_band *band, u32 cap)
2361 {
2362         int rx_streams;
2363         int tx_streams;
2364
2365         band->ht_cap.ht_supported = 1;
2366
2367         if (cap & MWL8K_CAP_MAX_AMSDU)
2368                 band->ht_cap.cap |= IEEE80211_HT_CAP_MAX_AMSDU;
2369         if (cap & MWL8K_CAP_GREENFIELD)
2370                 band->ht_cap.cap |= IEEE80211_HT_CAP_GRN_FLD;
2371         if (cap & MWL8K_CAP_AMPDU) {
2372                 hw->flags |= IEEE80211_HW_AMPDU_AGGREGATION;
2373                 band->ht_cap.ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
2374                 band->ht_cap.ampdu_density = IEEE80211_HT_MPDU_DENSITY_NONE;
2375         }
2376         if (cap & MWL8K_CAP_RX_STBC)
2377                 band->ht_cap.cap |= IEEE80211_HT_CAP_RX_STBC;
2378         if (cap & MWL8K_CAP_TX_STBC)
2379                 band->ht_cap.cap |= IEEE80211_HT_CAP_TX_STBC;
2380         if (cap & MWL8K_CAP_SHORTGI_40MHZ)
2381                 band->ht_cap.cap |= IEEE80211_HT_CAP_SGI_40;
2382         if (cap & MWL8K_CAP_SHORTGI_20MHZ)
2383                 band->ht_cap.cap |= IEEE80211_HT_CAP_SGI_20;
2384         if (cap & MWL8K_CAP_DELAY_BA)
2385                 band->ht_cap.cap |= IEEE80211_HT_CAP_DELAY_BA;
2386         if (cap & MWL8K_CAP_40MHZ)
2387                 band->ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2388
2389         rx_streams = hweight32(cap & MWL8K_CAP_RX_ANTENNA_MASK);
2390         tx_streams = hweight32(cap & MWL8K_CAP_TX_ANTENNA_MASK);
2391
2392         band->ht_cap.mcs.rx_mask[0] = 0xff;
2393         if (rx_streams >= 2)
2394                 band->ht_cap.mcs.rx_mask[1] = 0xff;
2395         if (rx_streams >= 3)
2396                 band->ht_cap.mcs.rx_mask[2] = 0xff;
2397         band->ht_cap.mcs.rx_mask[4] = 0x01;
2398         band->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
2399
2400         if (rx_streams != tx_streams) {
2401                 band->ht_cap.mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
2402                 band->ht_cap.mcs.tx_params |= (tx_streams - 1) <<
2403                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
2404         }
2405 }
2406
2407 static void
2408 mwl8k_set_caps(struct ieee80211_hw *hw, u32 caps)
2409 {
2410         struct mwl8k_priv *priv = hw->priv;
2411
2412         if (priv->caps)
2413                 return;
2414
2415         if ((caps & MWL8K_CAP_2GHZ4) || !(caps & MWL8K_CAP_BAND_MASK)) {
2416                 mwl8k_setup_2ghz_band(hw);
2417                 if (caps & MWL8K_CAP_MIMO)
2418                         mwl8k_set_ht_caps(hw, &priv->band_24, caps);
2419         }
2420
2421         if (caps & MWL8K_CAP_5GHZ) {
2422                 mwl8k_setup_5ghz_band(hw);
2423                 if (caps & MWL8K_CAP_MIMO)
2424                         mwl8k_set_ht_caps(hw, &priv->band_50, caps);
2425         }
2426
2427         priv->caps = caps;
2428 }
2429
2430 static int mwl8k_cmd_get_hw_spec_sta(struct ieee80211_hw *hw)
2431 {
2432         struct mwl8k_priv *priv = hw->priv;
2433         struct mwl8k_cmd_get_hw_spec_sta *cmd;
2434         int rc;
2435         int i;
2436
2437         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2438         if (cmd == NULL)
2439                 return -ENOMEM;
2440
2441         cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_HW_SPEC);
2442         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2443
2444         memset(cmd->perm_addr, 0xff, sizeof(cmd->perm_addr));
2445         cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
2446         cmd->rx_queue_ptr = cpu_to_le32(priv->rxq[0].rxd_dma);
2447         cmd->num_tx_queues = cpu_to_le32(mwl8k_tx_queues(priv));
2448         for (i = 0; i < mwl8k_tx_queues(priv); i++)
2449                 cmd->tx_queue_ptrs[i] = cpu_to_le32(priv->txq[i].txd_dma);
2450         cmd->num_tx_desc_per_queue = cpu_to_le32(MWL8K_TX_DESCS);
2451         cmd->total_rxd = cpu_to_le32(MWL8K_RX_DESCS);
2452
2453         rc = mwl8k_post_cmd(hw, &cmd->header);
2454
2455         if (!rc) {
2456                 SET_IEEE80211_PERM_ADDR(hw, cmd->perm_addr);
2457                 priv->num_mcaddrs = le16_to_cpu(cmd->num_mcaddrs);
2458                 priv->fw_rev = le32_to_cpu(cmd->fw_rev);
2459                 priv->hw_rev = cmd->hw_rev;
2460                 mwl8k_set_caps(hw, le32_to_cpu(cmd->caps));
2461                 priv->ap_macids_supported = 0x00000000;
2462                 priv->sta_macids_supported = 0x00000001;
2463         }
2464
2465         kfree(cmd);
2466         return rc;
2467 }
2468
2469 /*
2470  * CMD_GET_HW_SPEC (AP version).
2471  */
2472 struct mwl8k_cmd_get_hw_spec_ap {
2473         struct mwl8k_cmd_pkt header;
2474         __u8 hw_rev;
2475         __u8 host_interface;
2476         __le16 num_wcb;
2477         __le16 num_mcaddrs;
2478         __u8 perm_addr[ETH_ALEN];
2479         __le16 region_code;
2480         __le16 num_antenna;
2481         __le32 fw_rev;
2482         __le32 wcbbase0;
2483         __le32 rxwrptr;
2484         __le32 rxrdptr;
2485         __le32 ps_cookie;
2486         __le32 wcbbase1;
2487         __le32 wcbbase2;
2488         __le32 wcbbase3;
2489         __le32 fw_api_version;
2490         __le32 caps;
2491         __le32 num_of_ampdu_queues;
2492         __le32 wcbbase_ampdu[MWL8K_MAX_AMPDU_QUEUES];
2493 } __packed;
2494
2495 static int mwl8k_cmd_get_hw_spec_ap(struct ieee80211_hw *hw)
2496 {
2497         struct mwl8k_priv *priv = hw->priv;
2498         struct mwl8k_cmd_get_hw_spec_ap *cmd;
2499         int rc, i;
2500         u32 api_version;
2501
2502         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2503         if (cmd == NULL)
2504                 return -ENOMEM;
2505
2506         cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_HW_SPEC);
2507         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2508
2509         memset(cmd->perm_addr, 0xff, sizeof(cmd->perm_addr));
2510         cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
2511
2512         rc = mwl8k_post_cmd(hw, &cmd->header);
2513
2514         if (!rc) {
2515                 int off;
2516
2517                 api_version = le32_to_cpu(cmd->fw_api_version);
2518                 if (priv->device_info->fw_api_ap != api_version) {
2519                         printk(KERN_ERR "%s: Unsupported fw API version for %s."
2520                                "  Expected %d got %d.\n", MWL8K_NAME,
2521                                priv->device_info->part_name,
2522                                priv->device_info->fw_api_ap,
2523                                api_version);
2524                         rc = -EINVAL;
2525                         goto done;
2526                 }
2527                 SET_IEEE80211_PERM_ADDR(hw, cmd->perm_addr);
2528                 priv->num_mcaddrs = le16_to_cpu(cmd->num_mcaddrs);
2529                 priv->fw_rev = le32_to_cpu(cmd->fw_rev);
2530                 priv->hw_rev = cmd->hw_rev;
2531                 mwl8k_set_caps(hw, le32_to_cpu(cmd->caps));
2532                 priv->ap_macids_supported = 0x000000ff;
2533                 priv->sta_macids_supported = 0x00000100;
2534                 priv->num_ampdu_queues = le32_to_cpu(cmd->num_of_ampdu_queues);
2535                 if (priv->num_ampdu_queues > MWL8K_MAX_AMPDU_QUEUES) {
2536                         wiphy_warn(hw->wiphy, "fw reported %d ampdu queues"
2537                                    " but we only support %d.\n",
2538                                    priv->num_ampdu_queues,
2539                                    MWL8K_MAX_AMPDU_QUEUES);
2540                         priv->num_ampdu_queues = MWL8K_MAX_AMPDU_QUEUES;
2541                 }
2542                 off = le32_to_cpu(cmd->rxwrptr) & 0xffff;
2543                 iowrite32(priv->rxq[0].rxd_dma, priv->sram + off);
2544
2545                 off = le32_to_cpu(cmd->rxrdptr) & 0xffff;
2546                 iowrite32(priv->rxq[0].rxd_dma, priv->sram + off);
2547
2548                 priv->txq_offset[0] = le32_to_cpu(cmd->wcbbase0) & 0xffff;
2549                 priv->txq_offset[1] = le32_to_cpu(cmd->wcbbase1) & 0xffff;
2550                 priv->txq_offset[2] = le32_to_cpu(cmd->wcbbase2) & 0xffff;
2551                 priv->txq_offset[3] = le32_to_cpu(cmd->wcbbase3) & 0xffff;
2552
2553                 for (i = 0; i < priv->num_ampdu_queues; i++)
2554                         priv->txq_offset[i + MWL8K_TX_WMM_QUEUES] =
2555                                 le32_to_cpu(cmd->wcbbase_ampdu[i]) & 0xffff;
2556         }
2557
2558 done:
2559         kfree(cmd);
2560         return rc;
2561 }
2562
2563 /*
2564  * CMD_SET_HW_SPEC.
2565  */
2566 struct mwl8k_cmd_set_hw_spec {
2567         struct mwl8k_cmd_pkt header;
2568         __u8 hw_rev;
2569         __u8 host_interface;
2570         __le16 num_mcaddrs;
2571         __u8 perm_addr[ETH_ALEN];
2572         __le16 region_code;
2573         __le32 fw_rev;
2574         __le32 ps_cookie;
2575         __le32 caps;
2576         __le32 rx_queue_ptr;
2577         __le32 num_tx_queues;
2578         __le32 tx_queue_ptrs[MWL8K_MAX_TX_QUEUES];
2579         __le32 flags;
2580         __le32 num_tx_desc_per_queue;
2581         __le32 total_rxd;
2582 } __packed;
2583
2584 /* If enabled, MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY will cause
2585  * packets to expire 500 ms after the timestamp in the tx descriptor.  That is,
2586  * the packets that are queued for more than 500ms, will be dropped in the
2587  * hardware. This helps minimizing the issues caused due to head-of-line
2588  * blocking where a slow client can hog the bandwidth and affect traffic to a
2589  * faster client.
2590  */
2591 #define MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY  0x00000400
2592 #define MWL8K_SET_HW_SPEC_FLAG_GENERATE_CCMP_HDR        0x00000200
2593 #define MWL8K_SET_HW_SPEC_FLAG_HOST_DECR_MGMT           0x00000080
2594 #define MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_PROBERESP       0x00000020
2595 #define MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_BEACON          0x00000010
2596
2597 static int mwl8k_cmd_set_hw_spec(struct ieee80211_hw *hw)
2598 {
2599         struct mwl8k_priv *priv = hw->priv;
2600         struct mwl8k_cmd_set_hw_spec *cmd;
2601         int rc;
2602         int i;
2603
2604         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2605         if (cmd == NULL)
2606                 return -ENOMEM;
2607
2608         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_HW_SPEC);
2609         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2610
2611         cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
2612         cmd->rx_queue_ptr = cpu_to_le32(priv->rxq[0].rxd_dma);
2613         cmd->num_tx_queues = cpu_to_le32(mwl8k_tx_queues(priv));
2614
2615         /*
2616          * Mac80211 stack has Q0 as highest priority and Q3 as lowest in
2617          * that order. Firmware has Q3 as highest priority and Q0 as lowest
2618          * in that order. Map Q3 of mac80211 to Q0 of firmware so that the
2619          * priority is interpreted the right way in firmware.
2620          */
2621         for (i = 0; i < mwl8k_tx_queues(priv); i++) {
2622                 int j = mwl8k_tx_queues(priv) - 1 - i;
2623                 cmd->tx_queue_ptrs[i] = cpu_to_le32(priv->txq[j].txd_dma);
2624         }
2625
2626         cmd->flags = cpu_to_le32(MWL8K_SET_HW_SPEC_FLAG_HOST_DECR_MGMT |
2627                                  MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_PROBERESP |
2628                                  MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_BEACON |
2629                                  MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY |
2630                                  MWL8K_SET_HW_SPEC_FLAG_GENERATE_CCMP_HDR);
2631         cmd->num_tx_desc_per_queue = cpu_to_le32(MWL8K_TX_DESCS);
2632         cmd->total_rxd = cpu_to_le32(MWL8K_RX_DESCS);
2633
2634         rc = mwl8k_post_cmd(hw, &cmd->header);
2635         kfree(cmd);
2636
2637         return rc;
2638 }
2639
2640 /*
2641  * CMD_MAC_MULTICAST_ADR.
2642  */
2643 struct mwl8k_cmd_mac_multicast_adr {
2644         struct mwl8k_cmd_pkt header;
2645         __le16 action;
2646         __le16 numaddr;
2647         __u8 addr[0][ETH_ALEN];
2648 };
2649
2650 #define MWL8K_ENABLE_RX_DIRECTED        0x0001
2651 #define MWL8K_ENABLE_RX_MULTICAST       0x0002
2652 #define MWL8K_ENABLE_RX_ALL_MULTICAST   0x0004
2653 #define MWL8K_ENABLE_RX_BROADCAST       0x0008
2654
2655 static struct mwl8k_cmd_pkt *
2656 __mwl8k_cmd_mac_multicast_adr(struct ieee80211_hw *hw, int allmulti,
2657                               struct netdev_hw_addr_list *mc_list)
2658 {
2659         struct mwl8k_priv *priv = hw->priv;
2660         struct mwl8k_cmd_mac_multicast_adr *cmd;
2661         int size;
2662         int mc_count = 0;
2663
2664         if (mc_list)
2665                 mc_count = netdev_hw_addr_list_count(mc_list);
2666
2667         if (allmulti || mc_count > priv->num_mcaddrs) {
2668                 allmulti = 1;
2669                 mc_count = 0;
2670         }
2671
2672         size = sizeof(*cmd) + mc_count * ETH_ALEN;
2673
2674         cmd = kzalloc(size, GFP_ATOMIC);
2675         if (cmd == NULL)
2676                 return NULL;
2677
2678         cmd->header.code = cpu_to_le16(MWL8K_CMD_MAC_MULTICAST_ADR);
2679         cmd->header.length = cpu_to_le16(size);
2680         cmd->action = cpu_to_le16(MWL8K_ENABLE_RX_DIRECTED |
2681                                   MWL8K_ENABLE_RX_BROADCAST);
2682
2683         if (allmulti) {
2684                 cmd->action |= cpu_to_le16(MWL8K_ENABLE_RX_ALL_MULTICAST);
2685         } else if (mc_count) {
2686                 struct netdev_hw_addr *ha;
2687                 int i = 0;
2688
2689                 cmd->action |= cpu_to_le16(MWL8K_ENABLE_RX_MULTICAST);
2690                 cmd->numaddr = cpu_to_le16(mc_count);
2691                 netdev_hw_addr_list_for_each(ha, mc_list) {
2692                         memcpy(cmd->addr[i], ha->addr, ETH_ALEN);
2693                 }
2694         }
2695
2696         return &cmd->header;
2697 }
2698
2699 /*
2700  * CMD_GET_STAT.
2701  */
2702 struct mwl8k_cmd_get_stat {
2703         struct mwl8k_cmd_pkt header;
2704         __le32 stats[64];
2705 } __packed;
2706
2707 #define MWL8K_STAT_ACK_FAILURE  9
2708 #define MWL8K_STAT_RTS_FAILURE  12
2709 #define MWL8K_STAT_FCS_ERROR    24
2710 #define MWL8K_STAT_RTS_SUCCESS  11
2711
2712 static int mwl8k_cmd_get_stat(struct ieee80211_hw *hw,
2713                               struct ieee80211_low_level_stats *stats)
2714 {
2715         struct mwl8k_cmd_get_stat *cmd;
2716         int rc;
2717
2718         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2719         if (cmd == NULL)
2720                 return -ENOMEM;
2721
2722         cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_STAT);
2723         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2724
2725         rc = mwl8k_post_cmd(hw, &cmd->header);
2726         if (!rc) {
2727                 stats->dot11ACKFailureCount =
2728                         le32_to_cpu(cmd->stats[MWL8K_STAT_ACK_FAILURE]);
2729                 stats->dot11RTSFailureCount =
2730                         le32_to_cpu(cmd->stats[MWL8K_STAT_RTS_FAILURE]);
2731                 stats->dot11FCSErrorCount =
2732                         le32_to_cpu(cmd->stats[MWL8K_STAT_FCS_ERROR]);
2733                 stats->dot11RTSSuccessCount =
2734                         le32_to_cpu(cmd->stats[MWL8K_STAT_RTS_SUCCESS]);
2735         }
2736         kfree(cmd);
2737
2738         return rc;
2739 }
2740
2741 /*
2742  * CMD_RADIO_CONTROL.
2743  */
2744 struct mwl8k_cmd_radio_control {
2745         struct mwl8k_cmd_pkt header;
2746         __le16 action;
2747         __le16 control;
2748         __le16 radio_on;
2749 } __packed;
2750
2751 static int
2752 mwl8k_cmd_radio_control(struct ieee80211_hw *hw, bool enable, bool force)
2753 {
2754         struct mwl8k_priv *priv = hw->priv;
2755         struct mwl8k_cmd_radio_control *cmd;
2756         int rc;
2757
2758         if (enable == priv->radio_on && !force)
2759                 return 0;
2760
2761         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2762         if (cmd == NULL)
2763                 return -ENOMEM;
2764
2765         cmd->header.code = cpu_to_le16(MWL8K_CMD_RADIO_CONTROL);
2766         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2767         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
2768         cmd->control = cpu_to_le16(priv->radio_short_preamble ? 3 : 1);
2769         cmd->radio_on = cpu_to_le16(enable ? 0x0001 : 0x0000);
2770
2771         rc = mwl8k_post_cmd(hw, &cmd->header);
2772         kfree(cmd);
2773
2774         if (!rc)
2775                 priv->radio_on = enable;
2776
2777         return rc;
2778 }
2779
2780 static int mwl8k_cmd_radio_disable(struct ieee80211_hw *hw)
2781 {
2782         return mwl8k_cmd_radio_control(hw, 0, 0);
2783 }
2784
2785 static int mwl8k_cmd_radio_enable(struct ieee80211_hw *hw)
2786 {
2787         return mwl8k_cmd_radio_control(hw, 1, 0);
2788 }
2789
2790 static int
2791 mwl8k_set_radio_preamble(struct ieee80211_hw *hw, bool short_preamble)
2792 {
2793         struct mwl8k_priv *priv = hw->priv;
2794
2795         priv->radio_short_preamble = short_preamble;
2796
2797         return mwl8k_cmd_radio_control(hw, 1, 1);
2798 }
2799
2800 /*
2801  * CMD_RF_TX_POWER.
2802  */
2803 #define MWL8K_RF_TX_POWER_LEVEL_TOTAL   8
2804
2805 struct mwl8k_cmd_rf_tx_power {
2806         struct mwl8k_cmd_pkt header;
2807         __le16 action;
2808         __le16 support_level;
2809         __le16 current_level;
2810         __le16 reserved;
2811         __le16 power_level_list[MWL8K_RF_TX_POWER_LEVEL_TOTAL];
2812 } __packed;
2813
2814 static int mwl8k_cmd_rf_tx_power(struct ieee80211_hw *hw, int dBm)
2815 {
2816         struct mwl8k_cmd_rf_tx_power *cmd;
2817         int rc;
2818
2819         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2820         if (cmd == NULL)
2821                 return -ENOMEM;
2822
2823         cmd->header.code = cpu_to_le16(MWL8K_CMD_RF_TX_POWER);
2824         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2825         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
2826         cmd->support_level = cpu_to_le16(dBm);
2827
2828         rc = mwl8k_post_cmd(hw, &cmd->header);
2829         kfree(cmd);
2830
2831         return rc;
2832 }
2833
2834 /*
2835  * CMD_TX_POWER.
2836  */
2837 #define MWL8K_TX_POWER_LEVEL_TOTAL      12
2838
2839 struct mwl8k_cmd_tx_power {
2840         struct mwl8k_cmd_pkt header;
2841         __le16 action;
2842         __le16 band;
2843         __le16 channel;
2844         __le16 bw;
2845         __le16 sub_ch;
2846         __le16 power_level_list[MWL8K_TX_POWER_LEVEL_TOTAL];
2847 } __packed;
2848
2849 static int mwl8k_cmd_tx_power(struct ieee80211_hw *hw,
2850                                      struct ieee80211_conf *conf,
2851                                      unsigned short pwr)
2852 {
2853         struct ieee80211_channel *channel = conf->chandef.chan;
2854         enum nl80211_channel_type channel_type =
2855                 cfg80211_get_chandef_type(&conf->chandef);
2856         struct mwl8k_cmd_tx_power *cmd;
2857         int rc;
2858         int i;
2859
2860         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2861         if (cmd == NULL)
2862                 return -ENOMEM;
2863
2864         cmd->header.code = cpu_to_le16(MWL8K_CMD_TX_POWER);
2865         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2866         cmd->action = cpu_to_le16(MWL8K_CMD_SET_LIST);
2867
2868         if (channel->band == IEEE80211_BAND_2GHZ)
2869                 cmd->band = cpu_to_le16(0x1);
2870         else if (channel->band == IEEE80211_BAND_5GHZ)
2871                 cmd->band = cpu_to_le16(0x4);
2872
2873         cmd->channel = cpu_to_le16(channel->hw_value);
2874
2875         if (channel_type == NL80211_CHAN_NO_HT ||
2876             channel_type == NL80211_CHAN_HT20) {
2877                 cmd->bw = cpu_to_le16(0x2);
2878         } else {
2879                 cmd->bw = cpu_to_le16(0x4);
2880                 if (channel_type == NL80211_CHAN_HT40MINUS)
2881                         cmd->sub_ch = cpu_to_le16(0x3);
2882                 else if (channel_type == NL80211_CHAN_HT40PLUS)
2883                         cmd->sub_ch = cpu_to_le16(0x1);
2884         }
2885
2886         for (i = 0; i < MWL8K_TX_POWER_LEVEL_TOTAL; i++)
2887                 cmd->power_level_list[i] = cpu_to_le16(pwr);
2888
2889         rc = mwl8k_post_cmd(hw, &cmd->header);
2890         kfree(cmd);
2891
2892         return rc;
2893 }
2894
2895 /*
2896  * CMD_RF_ANTENNA.
2897  */
2898 struct mwl8k_cmd_rf_antenna {
2899         struct mwl8k_cmd_pkt header;
2900         __le16 antenna;
2901         __le16 mode;
2902 } __packed;
2903
2904 #define MWL8K_RF_ANTENNA_RX             1
2905 #define MWL8K_RF_ANTENNA_TX             2
2906
2907 static int
2908 mwl8k_cmd_rf_antenna(struct ieee80211_hw *hw, int antenna, int mask)
2909 {
2910         struct mwl8k_cmd_rf_antenna *cmd;
2911         int rc;
2912
2913         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2914         if (cmd == NULL)
2915                 return -ENOMEM;
2916
2917         cmd->header.code = cpu_to_le16(MWL8K_CMD_RF_ANTENNA);
2918         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2919         cmd->antenna = cpu_to_le16(antenna);
2920         cmd->mode = cpu_to_le16(mask);
2921
2922         rc = mwl8k_post_cmd(hw, &cmd->header);
2923         kfree(cmd);
2924
2925         return rc;
2926 }
2927
2928 /*
2929  * CMD_SET_BEACON.
2930  */
2931 struct mwl8k_cmd_set_beacon {
2932         struct mwl8k_cmd_pkt header;
2933         __le16 beacon_len;
2934         __u8 beacon[0];
2935 };
2936
2937 static int mwl8k_cmd_set_beacon(struct ieee80211_hw *hw,
2938                                 struct ieee80211_vif *vif, u8 *beacon, int len)
2939 {
2940         struct mwl8k_cmd_set_beacon *cmd;
2941         int rc;
2942
2943         cmd = kzalloc(sizeof(*cmd) + len, GFP_KERNEL);
2944         if (cmd == NULL)
2945                 return -ENOMEM;
2946
2947         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_BEACON);
2948         cmd->header.length = cpu_to_le16(sizeof(*cmd) + len);
2949         cmd->beacon_len = cpu_to_le16(len);
2950         memcpy(cmd->beacon, beacon, len);
2951
2952         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
2953         kfree(cmd);
2954
2955         return rc;
2956 }
2957
2958 /*
2959  * CMD_SET_PRE_SCAN.
2960  */
2961 struct mwl8k_cmd_set_pre_scan {
2962         struct mwl8k_cmd_pkt header;
2963 } __packed;
2964
2965 static int mwl8k_cmd_set_pre_scan(struct ieee80211_hw *hw)
2966 {
2967         struct mwl8k_cmd_set_pre_scan *cmd;
2968         int rc;
2969
2970         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2971         if (cmd == NULL)
2972                 return -ENOMEM;
2973
2974         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_PRE_SCAN);
2975         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2976
2977         rc = mwl8k_post_cmd(hw, &cmd->header);
2978         kfree(cmd);
2979
2980         return rc;
2981 }
2982
2983 /*
2984  * CMD_SET_POST_SCAN.
2985  */
2986 struct mwl8k_cmd_set_post_scan {
2987         struct mwl8k_cmd_pkt header;
2988         __le32 isibss;
2989         __u8 bssid[ETH_ALEN];
2990 } __packed;
2991
2992 static int
2993 mwl8k_cmd_set_post_scan(struct ieee80211_hw *hw, const __u8 *mac)
2994 {
2995         struct mwl8k_cmd_set_post_scan *cmd;
2996         int rc;
2997
2998         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2999         if (cmd == NULL)
3000                 return -ENOMEM;
3001
3002         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_POST_SCAN);
3003         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3004         cmd->isibss = 0;
3005         memcpy(cmd->bssid, mac, ETH_ALEN);
3006
3007         rc = mwl8k_post_cmd(hw, &cmd->header);
3008         kfree(cmd);
3009
3010         return rc;
3011 }
3012
3013 /*
3014  * CMD_SET_RF_CHANNEL.
3015  */
3016 struct mwl8k_cmd_set_rf_channel {
3017         struct mwl8k_cmd_pkt header;
3018         __le16 action;
3019         __u8 current_channel;
3020         __le32 channel_flags;
3021 } __packed;
3022
3023 static int mwl8k_cmd_set_rf_channel(struct ieee80211_hw *hw,
3024                                     struct ieee80211_conf *conf)
3025 {
3026         struct ieee80211_channel *channel = conf->chandef.chan;
3027         enum nl80211_channel_type channel_type =
3028                 cfg80211_get_chandef_type(&conf->chandef);
3029         struct mwl8k_cmd_set_rf_channel *cmd;
3030         int rc;
3031
3032         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3033         if (cmd == NULL)
3034                 return -ENOMEM;
3035
3036         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RF_CHANNEL);
3037         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3038         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3039         cmd->current_channel = channel->hw_value;
3040
3041         if (channel->band == IEEE80211_BAND_2GHZ)
3042                 cmd->channel_flags |= cpu_to_le32(0x00000001);
3043         else if (channel->band == IEEE80211_BAND_5GHZ)
3044                 cmd->channel_flags |= cpu_to_le32(0x00000004);
3045
3046         if (channel_type == NL80211_CHAN_NO_HT ||
3047             channel_type == NL80211_CHAN_HT20)
3048                 cmd->channel_flags |= cpu_to_le32(0x00000080);
3049         else if (channel_type == NL80211_CHAN_HT40MINUS)
3050                 cmd->channel_flags |= cpu_to_le32(0x000001900);
3051         else if (channel_type == NL80211_CHAN_HT40PLUS)
3052                 cmd->channel_flags |= cpu_to_le32(0x000000900);
3053
3054         rc = mwl8k_post_cmd(hw, &cmd->header);
3055         kfree(cmd);
3056
3057         return rc;
3058 }
3059
3060 /*
3061  * CMD_SET_AID.
3062  */
3063 #define MWL8K_FRAME_PROT_DISABLED                       0x00
3064 #define MWL8K_FRAME_PROT_11G                            0x07
3065 #define MWL8K_FRAME_PROT_11N_HT_40MHZ_ONLY              0x02
3066 #define MWL8K_FRAME_PROT_11N_HT_ALL                     0x06
3067
3068 struct mwl8k_cmd_update_set_aid {
3069         struct  mwl8k_cmd_pkt header;
3070         __le16  aid;
3071
3072          /* AP's MAC address (BSSID) */
3073         __u8    bssid[ETH_ALEN];
3074         __le16  protection_mode;
3075         __u8    supp_rates[14];
3076 } __packed;
3077
3078 static void legacy_rate_mask_to_array(u8 *rates, u32 mask)
3079 {
3080         int i;
3081         int j;
3082
3083         /*
3084          * Clear nonstandard rate 4.
3085          */
3086         mask &= 0x1fef;
3087
3088         for (i = 0, j = 0; i < 13; i++) {
3089                 if (mask & (1 << i))
3090                         rates[j++] = mwl8k_rates_24[i].hw_value;
3091         }
3092 }
3093
3094 static int
3095 mwl8k_cmd_set_aid(struct ieee80211_hw *hw,
3096                   struct ieee80211_vif *vif, u32 legacy_rate_mask)
3097 {
3098         struct mwl8k_cmd_update_set_aid *cmd;
3099         u16 prot_mode;
3100         int rc;
3101
3102         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3103         if (cmd == NULL)
3104                 return -ENOMEM;
3105
3106         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_AID);
3107         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3108         cmd->aid = cpu_to_le16(vif->bss_conf.aid);
3109         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
3110
3111         if (vif->bss_conf.use_cts_prot) {
3112                 prot_mode = MWL8K_FRAME_PROT_11G;
3113         } else {
3114                 switch (vif->bss_conf.ht_operation_mode &
3115                         IEEE80211_HT_OP_MODE_PROTECTION) {
3116                 case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
3117                         prot_mode = MWL8K_FRAME_PROT_11N_HT_40MHZ_ONLY;
3118                         break;
3119                 case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
3120                         prot_mode = MWL8K_FRAME_PROT_11N_HT_ALL;
3121                         break;
3122                 default:
3123                         prot_mode = MWL8K_FRAME_PROT_DISABLED;
3124                         break;
3125                 }
3126         }
3127         cmd->protection_mode = cpu_to_le16(prot_mode);
3128
3129         legacy_rate_mask_to_array(cmd->supp_rates, legacy_rate_mask);
3130
3131         rc = mwl8k_post_cmd(hw, &cmd->header);
3132         kfree(cmd);
3133
3134         return rc;
3135 }
3136
3137 /*
3138  * CMD_SET_RATE.
3139  */
3140 struct mwl8k_cmd_set_rate {
3141         struct  mwl8k_cmd_pkt header;
3142         __u8    legacy_rates[14];
3143
3144         /* Bitmap for supported MCS codes.  */
3145         __u8    mcs_set[16];
3146         __u8    reserved[16];
3147 } __packed;
3148
3149 static int
3150 mwl8k_cmd_set_rate(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
3151                    u32 legacy_rate_mask, u8 *mcs_rates)
3152 {
3153         struct mwl8k_cmd_set_rate *cmd;
3154         int rc;
3155
3156         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3157         if (cmd == NULL)
3158                 return -ENOMEM;
3159
3160         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RATE);
3161         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3162         legacy_rate_mask_to_array(cmd->legacy_rates, legacy_rate_mask);
3163         memcpy(cmd->mcs_set, mcs_rates, 16);
3164
3165         rc = mwl8k_post_cmd(hw, &cmd->header);
3166         kfree(cmd);
3167
3168         return rc;
3169 }
3170
3171 /*
3172  * CMD_FINALIZE_JOIN.
3173  */
3174 #define MWL8K_FJ_BEACON_MAXLEN  128
3175
3176 struct mwl8k_cmd_finalize_join {
3177         struct mwl8k_cmd_pkt header;
3178         __le32 sleep_interval;  /* Number of beacon periods to sleep */
3179         __u8 beacon_data[MWL8K_FJ_BEACON_MAXLEN];
3180 } __packed;
3181
3182 static int mwl8k_cmd_finalize_join(struct ieee80211_hw *hw, void *frame,
3183                                    int framelen, int dtim)
3184 {
3185         struct mwl8k_cmd_finalize_join *cmd;
3186         struct ieee80211_mgmt *payload = frame;
3187         int payload_len;
3188         int rc;
3189
3190         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3191         if (cmd == NULL)
3192                 return -ENOMEM;
3193
3194         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_FINALIZE_JOIN);
3195         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3196         cmd->sleep_interval = cpu_to_le32(dtim ? dtim : 1);
3197
3198         payload_len = framelen - ieee80211_hdrlen(payload->frame_control);
3199         if (payload_len < 0)
3200                 payload_len = 0;
3201         else if (payload_len > MWL8K_FJ_BEACON_MAXLEN)
3202                 payload_len = MWL8K_FJ_BEACON_MAXLEN;
3203
3204         memcpy(cmd->beacon_data, &payload->u.beacon, payload_len);
3205
3206         rc = mwl8k_post_cmd(hw, &cmd->header);
3207         kfree(cmd);
3208
3209         return rc;
3210 }
3211
3212 /*
3213  * CMD_SET_RTS_THRESHOLD.
3214  */
3215 struct mwl8k_cmd_set_rts_threshold {
3216         struct mwl8k_cmd_pkt header;
3217         __le16 action;
3218         __le16 threshold;
3219 } __packed;
3220
3221 static int
3222 mwl8k_cmd_set_rts_threshold(struct ieee80211_hw *hw, int rts_thresh)
3223 {
3224         struct mwl8k_cmd_set_rts_threshold *cmd;
3225         int rc;
3226
3227         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3228         if (cmd == NULL)
3229                 return -ENOMEM;
3230
3231         cmd->header.code = cpu_to_le16(MWL8K_CMD_RTS_THRESHOLD);
3232         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3233         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3234         cmd->threshold = cpu_to_le16(rts_thresh);
3235
3236         rc = mwl8k_post_cmd(hw, &cmd->header);
3237         kfree(cmd);
3238
3239         return rc;
3240 }
3241
3242 /*
3243  * CMD_SET_SLOT.
3244  */
3245 struct mwl8k_cmd_set_slot {
3246         struct mwl8k_cmd_pkt header;
3247         __le16 action;
3248         __u8 short_slot;
3249 } __packed;
3250
3251 static int mwl8k_cmd_set_slot(struct ieee80211_hw *hw, bool short_slot_time)
3252 {
3253         struct mwl8k_cmd_set_slot *cmd;
3254         int rc;
3255
3256         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3257         if (cmd == NULL)
3258                 return -ENOMEM;
3259
3260         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_SLOT);
3261         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3262         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3263         cmd->short_slot = short_slot_time;
3264
3265         rc = mwl8k_post_cmd(hw, &cmd->header);
3266         kfree(cmd);
3267
3268         return rc;
3269 }
3270
3271 /*
3272  * CMD_SET_EDCA_PARAMS.
3273  */
3274 struct mwl8k_cmd_set_edca_params {
3275         struct mwl8k_cmd_pkt header;
3276
3277         /* See MWL8K_SET_EDCA_XXX below */
3278         __le16 action;
3279
3280         /* TX opportunity in units of 32 us */
3281         __le16 txop;
3282
3283         union {
3284                 struct {
3285                         /* Log exponent of max contention period: 0...15 */
3286                         __le32 log_cw_max;
3287
3288                         /* Log exponent of min contention period: 0...15 */
3289                         __le32 log_cw_min;
3290
3291                         /* Adaptive interframe spacing in units of 32us */
3292                         __u8 aifs;
3293
3294                         /* TX queue to configure */
3295                         __u8 txq;
3296                 } ap;
3297                 struct {
3298                         /* Log exponent of max contention period: 0...15 */
3299                         __u8 log_cw_max;
3300
3301                         /* Log exponent of min contention period: 0...15 */
3302                         __u8 log_cw_min;
3303
3304                         /* Adaptive interframe spacing in units of 32us */
3305                         __u8 aifs;
3306
3307                         /* TX queue to configure */
3308                         __u8 txq;
3309                 } sta;
3310         };
3311 } __packed;
3312
3313 #define MWL8K_SET_EDCA_CW       0x01
3314 #define MWL8K_SET_EDCA_TXOP     0x02
3315 #define MWL8K_SET_EDCA_AIFS     0x04
3316
3317 #define MWL8K_SET_EDCA_ALL      (MWL8K_SET_EDCA_CW | \
3318                                  MWL8K_SET_EDCA_TXOP | \
3319                                  MWL8K_SET_EDCA_AIFS)
3320
3321 static int
3322 mwl8k_cmd_set_edca_params(struct ieee80211_hw *hw, __u8 qnum,
3323                           __u16 cw_min, __u16 cw_max,
3324                           __u8 aifs, __u16 txop)
3325 {
3326         struct mwl8k_priv *priv = hw->priv;
3327         struct mwl8k_cmd_set_edca_params *cmd;
3328         int rc;
3329
3330         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3331         if (cmd == NULL)
3332                 return -ENOMEM;
3333
3334         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_EDCA_PARAMS);
3335         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3336         cmd->action = cpu_to_le16(MWL8K_SET_EDCA_ALL);
3337         cmd->txop = cpu_to_le16(txop);
3338         if (priv->ap_fw) {
3339                 cmd->ap.log_cw_max = cpu_to_le32(ilog2(cw_max + 1));
3340                 cmd->ap.log_cw_min = cpu_to_le32(ilog2(cw_min + 1));
3341                 cmd->ap.aifs = aifs;
3342                 cmd->ap.txq = qnum;
3343         } else {
3344                 cmd->sta.log_cw_max = (u8)ilog2(cw_max + 1);
3345                 cmd->sta.log_cw_min = (u8)ilog2(cw_min + 1);
3346                 cmd->sta.aifs = aifs;
3347                 cmd->sta.txq = qnum;
3348         }
3349
3350         rc = mwl8k_post_cmd(hw, &cmd->header);
3351         kfree(cmd);
3352
3353         return rc;
3354 }
3355
3356 /*
3357  * CMD_SET_WMM_MODE.
3358  */
3359 struct mwl8k_cmd_set_wmm_mode {
3360         struct mwl8k_cmd_pkt header;
3361         __le16 action;
3362 } __packed;
3363
3364 static int mwl8k_cmd_set_wmm_mode(struct ieee80211_hw *hw, bool enable)
3365 {
3366         struct mwl8k_priv *priv = hw->priv;
3367         struct mwl8k_cmd_set_wmm_mode *cmd;
3368         int rc;
3369
3370         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3371         if (cmd == NULL)
3372                 return -ENOMEM;
3373
3374         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_WMM_MODE);
3375         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3376         cmd->action = cpu_to_le16(!!enable);
3377
3378         rc = mwl8k_post_cmd(hw, &cmd->header);
3379         kfree(cmd);
3380
3381         if (!rc)
3382                 priv->wmm_enabled = enable;
3383
3384         return rc;
3385 }
3386
3387 /*
3388  * CMD_MIMO_CONFIG.
3389  */
3390 struct mwl8k_cmd_mimo_config {
3391         struct mwl8k_cmd_pkt header;
3392         __le32 action;
3393         __u8 rx_antenna_map;
3394         __u8 tx_antenna_map;
3395 } __packed;
3396
3397 static int mwl8k_cmd_mimo_config(struct ieee80211_hw *hw, __u8 rx, __u8 tx)
3398 {
3399         struct mwl8k_cmd_mimo_config *cmd;
3400         int rc;
3401
3402         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3403         if (cmd == NULL)
3404                 return -ENOMEM;
3405
3406         cmd->header.code = cpu_to_le16(MWL8K_CMD_MIMO_CONFIG);
3407         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3408         cmd->action = cpu_to_le32((u32)MWL8K_CMD_SET);
3409         cmd->rx_antenna_map = rx;
3410         cmd->tx_antenna_map = tx;
3411
3412         rc = mwl8k_post_cmd(hw, &cmd->header);
3413         kfree(cmd);
3414
3415         return rc;
3416 }
3417
3418 /*
3419  * CMD_USE_FIXED_RATE (STA version).
3420  */
3421 struct mwl8k_cmd_use_fixed_rate_sta {
3422         struct mwl8k_cmd_pkt header;
3423         __le32 action;
3424         __le32 allow_rate_drop;
3425         __le32 num_rates;
3426         struct {
3427                 __le32 is_ht_rate;
3428                 __le32 enable_retry;
3429                 __le32 rate;
3430                 __le32 retry_count;
3431         } rate_entry[8];
3432         __le32 rate_type;
3433         __le32 reserved1;
3434         __le32 reserved2;
3435 } __packed;
3436
3437 #define MWL8K_USE_AUTO_RATE     0x0002
3438 #define MWL8K_UCAST_RATE        0
3439
3440 static int mwl8k_cmd_use_fixed_rate_sta(struct ieee80211_hw *hw)
3441 {
3442         struct mwl8k_cmd_use_fixed_rate_sta *cmd;
3443         int rc;
3444
3445         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3446         if (cmd == NULL)
3447                 return -ENOMEM;
3448
3449         cmd->header.code = cpu_to_le16(MWL8K_CMD_USE_FIXED_RATE);
3450         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3451         cmd->action = cpu_to_le32(MWL8K_USE_AUTO_RATE);
3452         cmd->rate_type = cpu_to_le32(MWL8K_UCAST_RATE);
3453
3454         rc = mwl8k_post_cmd(hw, &cmd->header);
3455         kfree(cmd);
3456
3457         return rc;
3458 }
3459
3460 /*
3461  * CMD_USE_FIXED_RATE (AP version).
3462  */
3463 struct mwl8k_cmd_use_fixed_rate_ap {
3464         struct mwl8k_cmd_pkt header;
3465         __le32 action;
3466         __le32 allow_rate_drop;
3467         __le32 num_rates;
3468         struct mwl8k_rate_entry_ap {
3469                 __le32 is_ht_rate;
3470                 __le32 enable_retry;
3471                 __le32 rate;
3472                 __le32 retry_count;
3473         } rate_entry[4];
3474         u8 multicast_rate;
3475         u8 multicast_rate_type;
3476         u8 management_rate;
3477 } __packed;
3478
3479 static int
3480 mwl8k_cmd_use_fixed_rate_ap(struct ieee80211_hw *hw, int mcast, int mgmt)
3481 {
3482         struct mwl8k_cmd_use_fixed_rate_ap *cmd;
3483         int rc;
3484
3485         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3486         if (cmd == NULL)
3487                 return -ENOMEM;
3488
3489         cmd->header.code = cpu_to_le16(MWL8K_CMD_USE_FIXED_RATE);
3490         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3491         cmd->action = cpu_to_le32(MWL8K_USE_AUTO_RATE);
3492         cmd->multicast_rate = mcast;
3493         cmd->management_rate = mgmt;
3494
3495         rc = mwl8k_post_cmd(hw, &cmd->header);
3496         kfree(cmd);
3497
3498         return rc;
3499 }
3500
3501 /*
3502  * CMD_ENABLE_SNIFFER.
3503  */
3504 struct mwl8k_cmd_enable_sniffer {
3505         struct mwl8k_cmd_pkt header;
3506         __le32 action;
3507 } __packed;
3508
3509 static int mwl8k_cmd_enable_sniffer(struct ieee80211_hw *hw, bool enable)
3510 {
3511         struct mwl8k_cmd_enable_sniffer *cmd;
3512         int rc;
3513
3514         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3515         if (cmd == NULL)
3516                 return -ENOMEM;
3517
3518         cmd->header.code = cpu_to_le16(MWL8K_CMD_ENABLE_SNIFFER);
3519         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3520         cmd->action = cpu_to_le32(!!enable);
3521
3522         rc = mwl8k_post_cmd(hw, &cmd->header);
3523         kfree(cmd);
3524
3525         return rc;
3526 }
3527
3528 struct mwl8k_cmd_update_mac_addr {
3529         struct mwl8k_cmd_pkt header;
3530         union {
3531                 struct {
3532                         __le16 mac_type;
3533                         __u8 mac_addr[ETH_ALEN];
3534                 } mbss;
3535                 __u8 mac_addr[ETH_ALEN];
3536         };
3537 } __packed;
3538
3539 #define MWL8K_MAC_TYPE_PRIMARY_CLIENT           0
3540 #define MWL8K_MAC_TYPE_SECONDARY_CLIENT         1
3541 #define MWL8K_MAC_TYPE_PRIMARY_AP               2
3542 #define MWL8K_MAC_TYPE_SECONDARY_AP             3
3543
3544 static int mwl8k_cmd_update_mac_addr(struct ieee80211_hw *hw,
3545                                   struct ieee80211_vif *vif, u8 *mac, bool set)
3546 {
3547         struct mwl8k_priv *priv = hw->priv;
3548         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
3549         struct mwl8k_cmd_update_mac_addr *cmd;
3550         int mac_type;
3551         int rc;
3552
3553         mac_type = MWL8K_MAC_TYPE_PRIMARY_AP;
3554         if (vif != NULL && vif->type == NL80211_IFTYPE_STATION) {
3555                 if (mwl8k_vif->macid + 1 == ffs(priv->sta_macids_supported))
3556                         if (priv->ap_fw)
3557                                 mac_type = MWL8K_MAC_TYPE_SECONDARY_CLIENT;
3558                         else
3559                                 mac_type = MWL8K_MAC_TYPE_PRIMARY_CLIENT;
3560                 else
3561                         mac_type = MWL8K_MAC_TYPE_SECONDARY_CLIENT;
3562         } else if (vif != NULL && vif->type == NL80211_IFTYPE_AP) {
3563                 if (mwl8k_vif->macid + 1 == ffs(priv->ap_macids_supported))
3564                         mac_type = MWL8K_MAC_TYPE_PRIMARY_AP;
3565                 else
3566                         mac_type = MWL8K_MAC_TYPE_SECONDARY_AP;
3567         }
3568
3569         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3570         if (cmd == NULL)
3571                 return -ENOMEM;
3572
3573         if (set)
3574                 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_MAC_ADDR);
3575         else
3576                 cmd->header.code = cpu_to_le16(MWL8K_CMD_DEL_MAC_ADDR);
3577
3578         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3579         if (priv->ap_fw) {
3580                 cmd->mbss.mac_type = cpu_to_le16(mac_type);
3581                 memcpy(cmd->mbss.mac_addr, mac, ETH_ALEN);
3582         } else {
3583                 memcpy(cmd->mac_addr, mac, ETH_ALEN);
3584         }
3585
3586         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3587         kfree(cmd);
3588
3589         return rc;
3590 }
3591
3592 /*
3593  * MWL8K_CMD_SET_MAC_ADDR.
3594  */
3595 static inline int mwl8k_cmd_set_mac_addr(struct ieee80211_hw *hw,
3596                                   struct ieee80211_vif *vif, u8 *mac)
3597 {
3598         return mwl8k_cmd_update_mac_addr(hw, vif, mac, true);
3599 }
3600
3601 /*
3602  * MWL8K_CMD_DEL_MAC_ADDR.
3603  */
3604 static inline int mwl8k_cmd_del_mac_addr(struct ieee80211_hw *hw,
3605                                   struct ieee80211_vif *vif, u8 *mac)
3606 {
3607         return mwl8k_cmd_update_mac_addr(hw, vif, mac, false);
3608 }
3609
3610 /*
3611  * CMD_SET_RATEADAPT_MODE.
3612  */
3613 struct mwl8k_cmd_set_rate_adapt_mode {
3614         struct mwl8k_cmd_pkt header;
3615         __le16 action;
3616         __le16 mode;
3617 } __packed;
3618
3619 static int mwl8k_cmd_set_rateadapt_mode(struct ieee80211_hw *hw, __u16 mode)
3620 {
3621         struct mwl8k_cmd_set_rate_adapt_mode *cmd;
3622         int rc;
3623
3624         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3625         if (cmd == NULL)
3626                 return -ENOMEM;
3627
3628         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RATEADAPT_MODE);
3629         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3630         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3631         cmd->mode = cpu_to_le16(mode);
3632
3633         rc = mwl8k_post_cmd(hw, &cmd->header);
3634         kfree(cmd);
3635
3636         return rc;
3637 }
3638
3639 /*
3640  * CMD_GET_WATCHDOG_BITMAP.
3641  */
3642 struct mwl8k_cmd_get_watchdog_bitmap {
3643         struct mwl8k_cmd_pkt header;
3644         u8      bitmap;
3645 } __packed;
3646
3647 static int mwl8k_cmd_get_watchdog_bitmap(struct ieee80211_hw *hw, u8 *bitmap)
3648 {
3649         struct mwl8k_cmd_get_watchdog_bitmap *cmd;
3650         int rc;
3651
3652         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3653         if (cmd == NULL)
3654                 return -ENOMEM;
3655
3656         cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_WATCHDOG_BITMAP);
3657         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3658
3659         rc = mwl8k_post_cmd(hw, &cmd->header);
3660         if (!rc)
3661                 *bitmap = cmd->bitmap;
3662
3663         kfree(cmd);
3664
3665         return rc;
3666 }
3667
3668 #define MWL8K_WMM_QUEUE_NUMBER  3
3669
3670 static void mwl8k_destroy_ba(struct ieee80211_hw *hw,
3671                              u8 idx);
3672
3673 static void mwl8k_watchdog_ba_events(struct work_struct *work)
3674 {
3675         int rc;
3676         u8 bitmap = 0, stream_index;
3677         struct mwl8k_ampdu_stream *streams;
3678         struct mwl8k_priv *priv =
3679                 container_of(work, struct mwl8k_priv, watchdog_ba_handle);
3680         struct ieee80211_hw *hw = priv->hw;
3681         int i;
3682         u32 status = 0;
3683
3684         mwl8k_fw_lock(hw);
3685
3686         rc = mwl8k_cmd_get_watchdog_bitmap(priv->hw, &bitmap);
3687         if (rc)
3688                 goto done;
3689
3690         spin_lock(&priv->stream_lock);
3691
3692         /* the bitmap is the hw queue number.  Map it to the ampdu queue. */
3693         for (i = 0; i < TOTAL_HW_TX_QUEUES; i++) {
3694                 if (bitmap & (1 << i)) {
3695                         stream_index = (i + MWL8K_WMM_QUEUE_NUMBER) %
3696                                        TOTAL_HW_TX_QUEUES;
3697                         streams = &priv->ampdu[stream_index];
3698                         if (streams->state == AMPDU_STREAM_ACTIVE) {
3699                                 ieee80211_stop_tx_ba_session(streams->sta,
3700                                                              streams->tid);
3701                                 spin_unlock(&priv->stream_lock);
3702                                 mwl8k_destroy_ba(hw, stream_index);
3703                                 spin_lock(&priv->stream_lock);
3704                         }
3705                 }
3706         }
3707
3708         spin_unlock(&priv->stream_lock);
3709 done:
3710         atomic_dec(&priv->watchdog_event_pending);
3711         status = ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
3712         iowrite32((status | MWL8K_A2H_INT_BA_WATCHDOG),
3713                   priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
3714         mwl8k_fw_unlock(hw);
3715         return;
3716 }
3717
3718
3719 /*
3720  * CMD_BSS_START.
3721  */
3722 struct mwl8k_cmd_bss_start {
3723         struct mwl8k_cmd_pkt header;
3724         __le32 enable;
3725 } __packed;
3726
3727 static int mwl8k_cmd_bss_start(struct ieee80211_hw *hw,
3728                                struct ieee80211_vif *vif, int enable)
3729 {
3730         struct mwl8k_cmd_bss_start *cmd;
3731         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
3732         struct mwl8k_priv *priv = hw->priv;
3733         int rc;
3734
3735         if (enable && (priv->running_bsses & (1 << mwl8k_vif->macid)))
3736                 return 0;
3737
3738         if (!enable && !(priv->running_bsses & (1 << mwl8k_vif->macid)))
3739                 return 0;
3740
3741         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3742         if (cmd == NULL)
3743                 return -ENOMEM;
3744
3745         cmd->header.code = cpu_to_le16(MWL8K_CMD_BSS_START);
3746         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3747         cmd->enable = cpu_to_le32(enable);
3748
3749         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3750         kfree(cmd);
3751
3752         if (!rc) {
3753                 if (enable)
3754                         priv->running_bsses |= (1 << mwl8k_vif->macid);
3755                 else
3756                         priv->running_bsses &= ~(1 << mwl8k_vif->macid);
3757         }
3758         return rc;
3759 }
3760
3761 static void mwl8k_enable_bsses(struct ieee80211_hw *hw, bool enable, u32 bitmap)
3762 {
3763         struct mwl8k_priv *priv = hw->priv;
3764         struct mwl8k_vif *mwl8k_vif, *tmp_vif;
3765         struct ieee80211_vif *vif;
3766
3767         list_for_each_entry_safe(mwl8k_vif, tmp_vif, &priv->vif_list, list) {
3768                 vif = mwl8k_vif->vif;
3769
3770                 if (!(bitmap & (1 << mwl8k_vif->macid)))
3771                         continue;
3772
3773                 if (vif->type == NL80211_IFTYPE_AP)
3774                         mwl8k_cmd_bss_start(hw, vif, enable);
3775         }
3776 }
3777 /*
3778  * CMD_BASTREAM.
3779  */
3780
3781 /*
3782  * UPSTREAM is tx direction
3783  */
3784 #define BASTREAM_FLAG_DIRECTION_UPSTREAM        0x00
3785 #define BASTREAM_FLAG_IMMEDIATE_TYPE            0x01
3786
3787 enum ba_stream_action_type {
3788         MWL8K_BA_CREATE,
3789         MWL8K_BA_UPDATE,
3790         MWL8K_BA_DESTROY,
3791         MWL8K_BA_FLUSH,
3792         MWL8K_BA_CHECK,
3793 };
3794
3795
3796 struct mwl8k_create_ba_stream {
3797         __le32  flags;
3798         __le32  idle_thrs;
3799         __le32  bar_thrs;
3800         __le32  window_size;
3801         u8      peer_mac_addr[6];
3802         u8      dialog_token;
3803         u8      tid;
3804         u8      queue_id;
3805         u8      param_info;
3806         __le32  ba_context;
3807         u8      reset_seq_no_flag;
3808         __le16  curr_seq_no;
3809         u8      sta_src_mac_addr[6];
3810 } __packed;
3811
3812 struct mwl8k_destroy_ba_stream {
3813         __le32  flags;
3814         __le32  ba_context;
3815 } __packed;
3816
3817 struct mwl8k_cmd_bastream {
3818         struct mwl8k_cmd_pkt    header;
3819         __le32  action;
3820         union {
3821                 struct mwl8k_create_ba_stream   create_params;
3822                 struct mwl8k_destroy_ba_stream  destroy_params;
3823         };
3824 } __packed;
3825
3826 static int
3827 mwl8k_check_ba(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream,
3828                struct ieee80211_vif *vif)
3829 {
3830         struct mwl8k_cmd_bastream *cmd;
3831         int rc;
3832
3833         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3834         if (cmd == NULL)
3835                 return -ENOMEM;
3836
3837         cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
3838         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3839
3840         cmd->action = cpu_to_le32(MWL8K_BA_CHECK);
3841
3842         cmd->create_params.queue_id = stream->idx;
3843         memcpy(&cmd->create_params.peer_mac_addr[0], stream->sta->addr,
3844                ETH_ALEN);
3845         cmd->create_params.tid = stream->tid;
3846
3847         cmd->create_params.flags =
3848                 cpu_to_le32(BASTREAM_FLAG_IMMEDIATE_TYPE) |
3849                 cpu_to_le32(BASTREAM_FLAG_DIRECTION_UPSTREAM);
3850
3851         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3852
3853         kfree(cmd);
3854
3855         return rc;
3856 }
3857
3858 static int
3859 mwl8k_create_ba(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream,
3860                 u8 buf_size, struct ieee80211_vif *vif)
3861 {
3862         struct mwl8k_cmd_bastream *cmd;
3863         int rc;
3864
3865         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3866         if (cmd == NULL)
3867                 return -ENOMEM;
3868
3869
3870         cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
3871         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3872
3873         cmd->action = cpu_to_le32(MWL8K_BA_CREATE);
3874
3875         cmd->create_params.bar_thrs = cpu_to_le32((u32)buf_size);
3876         cmd->create_params.window_size = cpu_to_le32((u32)buf_size);
3877         cmd->create_params.queue_id = stream->idx;
3878
3879         memcpy(cmd->create_params.peer_mac_addr, stream->sta->addr, ETH_ALEN);
3880         cmd->create_params.tid = stream->tid;
3881         cmd->create_params.curr_seq_no = cpu_to_le16(0);
3882         cmd->create_params.reset_seq_no_flag = 1;
3883
3884         cmd->create_params.param_info =
3885                 (stream->sta->ht_cap.ampdu_factor &
3886                  IEEE80211_HT_AMPDU_PARM_FACTOR) |
3887                 ((stream->sta->ht_cap.ampdu_density << 2) &
3888                  IEEE80211_HT_AMPDU_PARM_DENSITY);
3889
3890         cmd->create_params.flags =
3891                 cpu_to_le32(BASTREAM_FLAG_IMMEDIATE_TYPE |
3892                                         BASTREAM_FLAG_DIRECTION_UPSTREAM);
3893
3894         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3895
3896         wiphy_debug(hw->wiphy, "Created a BA stream for %pM : tid %d\n",
3897                 stream->sta->addr, stream->tid);
3898         kfree(cmd);
3899
3900         return rc;
3901 }
3902
3903 static void mwl8k_destroy_ba(struct ieee80211_hw *hw,
3904                              u8 idx)
3905 {
3906         struct mwl8k_cmd_bastream *cmd;
3907
3908         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3909         if (cmd == NULL)
3910                 return;
3911
3912         cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
3913         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3914         cmd->action = cpu_to_le32(MWL8K_BA_DESTROY);
3915
3916         cmd->destroy_params.ba_context = cpu_to_le32(idx);
3917         mwl8k_post_cmd(hw, &cmd->header);
3918
3919         wiphy_debug(hw->wiphy, "Deleted BA stream index %d\n", idx);
3920
3921         kfree(cmd);
3922 }
3923
3924 /*
3925  * CMD_SET_NEW_STN.
3926  */
3927 struct mwl8k_cmd_set_new_stn {
3928         struct mwl8k_cmd_pkt header;
3929         __le16 aid;
3930         __u8 mac_addr[6];
3931         __le16 stn_id;
3932         __le16 action;
3933         __le16 rsvd;
3934         __le32 legacy_rates;
3935         __u8 ht_rates[4];
3936         __le16 cap_info;
3937         __le16 ht_capabilities_info;
3938         __u8 mac_ht_param_info;
3939         __u8 rev;
3940         __u8 control_channel;
3941         __u8 add_channel;
3942         __le16 op_mode;
3943         __le16 stbc;
3944         __u8 add_qos_info;
3945         __u8 is_qos_sta;
3946         __le32 fw_sta_ptr;
3947 } __packed;
3948
3949 #define MWL8K_STA_ACTION_ADD            0
3950 #define MWL8K_STA_ACTION_REMOVE         2
3951
3952 static int mwl8k_cmd_set_new_stn_add(struct ieee80211_hw *hw,
3953                                      struct ieee80211_vif *vif,
3954                                      struct ieee80211_sta *sta)
3955 {
3956         struct mwl8k_cmd_set_new_stn *cmd;
3957         u32 rates;
3958         int rc;
3959
3960         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3961         if (cmd == NULL)
3962                 return -ENOMEM;
3963
3964         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
3965         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3966         cmd->aid = cpu_to_le16(sta->aid);
3967         memcpy(cmd->mac_addr, sta->addr, ETH_ALEN);
3968         cmd->stn_id = cpu_to_le16(sta->aid);
3969         cmd->action = cpu_to_le16(MWL8K_STA_ACTION_ADD);
3970         if (hw->conf.chandef.chan->band == IEEE80211_BAND_2GHZ)
3971                 rates = sta->supp_rates[IEEE80211_BAND_2GHZ];
3972         else
3973                 rates = sta->supp_rates[IEEE80211_BAND_5GHZ] << 5;
3974         cmd->legacy_rates = cpu_to_le32(rates);
3975         if (sta->ht_cap.ht_supported) {
3976                 cmd->ht_rates[0] = sta->ht_cap.mcs.rx_mask[0];
3977                 cmd->ht_rates[1] = sta->ht_cap.mcs.rx_mask[1];
3978                 cmd->ht_rates[2] = sta->ht_cap.mcs.rx_mask[2];
3979                 cmd->ht_rates[3] = sta->ht_cap.mcs.rx_mask[3];
3980                 cmd->ht_capabilities_info = cpu_to_le16(sta->ht_cap.cap);
3981                 cmd->mac_ht_param_info = (sta->ht_cap.ampdu_factor & 3) |
3982                         ((sta->ht_cap.ampdu_density & 7) << 2);
3983                 cmd->is_qos_sta = 1;
3984         }
3985
3986         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3987         kfree(cmd);
3988
3989         return rc;
3990 }
3991
3992 static int mwl8k_cmd_set_new_stn_add_self(struct ieee80211_hw *hw,
3993                                           struct ieee80211_vif *vif)
3994 {
3995         struct mwl8k_cmd_set_new_stn *cmd;
3996         int rc;
3997
3998         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3999         if (cmd == NULL)
4000                 return -ENOMEM;
4001
4002         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
4003         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4004         memcpy(cmd->mac_addr, vif->addr, ETH_ALEN);
4005
4006         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4007         kfree(cmd);
4008
4009         return rc;
4010 }
4011
4012 static int mwl8k_cmd_set_new_stn_del(struct ieee80211_hw *hw,
4013                                      struct ieee80211_vif *vif, u8 *addr)
4014 {
4015         struct mwl8k_cmd_set_new_stn *cmd;
4016         struct mwl8k_priv *priv = hw->priv;
4017         int rc, i;
4018         u8 idx;
4019
4020         spin_lock(&priv->stream_lock);
4021         /* Destroy any active ampdu streams for this sta */
4022         for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
4023                 struct mwl8k_ampdu_stream *s;
4024                 s = &priv->ampdu[i];
4025                 if (s->state != AMPDU_NO_STREAM) {
4026                         if (memcmp(s->sta->addr, addr, ETH_ALEN) == 0) {
4027                                 if (s->state == AMPDU_STREAM_ACTIVE) {
4028                                         idx = s->idx;
4029                                         spin_unlock(&priv->stream_lock);
4030                                         mwl8k_destroy_ba(hw, idx);
4031                                         spin_lock(&priv->stream_lock);
4032                                 } else if (s->state == AMPDU_STREAM_NEW) {
4033                                         mwl8k_remove_stream(hw, s);
4034                                 }
4035                         }
4036                 }
4037         }
4038
4039         spin_unlock(&priv->stream_lock);
4040
4041         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4042         if (cmd == NULL)
4043                 return -ENOMEM;
4044
4045         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
4046         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4047         memcpy(cmd->mac_addr, addr, ETH_ALEN);
4048         cmd->action = cpu_to_le16(MWL8K_STA_ACTION_REMOVE);
4049
4050         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4051         kfree(cmd);
4052
4053         return rc;
4054 }
4055
4056 /*
4057  * CMD_UPDATE_ENCRYPTION.
4058  */
4059
4060 #define MAX_ENCR_KEY_LENGTH     16
4061 #define MIC_KEY_LENGTH          8
4062
4063 struct mwl8k_cmd_update_encryption {
4064         struct mwl8k_cmd_pkt header;
4065
4066         __le32 action;
4067         __le32 reserved;
4068         __u8 mac_addr[6];
4069         __u8 encr_type;
4070
4071 } __packed;
4072
4073 struct mwl8k_cmd_set_key {
4074         struct mwl8k_cmd_pkt header;
4075
4076         __le32 action;
4077         __le32 reserved;
4078         __le16 length;
4079         __le16 key_type_id;
4080         __le32 key_info;
4081         __le32 key_id;
4082         __le16 key_len;
4083         __u8 key_material[MAX_ENCR_KEY_LENGTH];
4084         __u8 tkip_tx_mic_key[MIC_KEY_LENGTH];
4085         __u8 tkip_rx_mic_key[MIC_KEY_LENGTH];
4086         __le16 tkip_rsc_low;
4087         __le32 tkip_rsc_high;
4088         __le16 tkip_tsc_low;
4089         __le32 tkip_tsc_high;
4090         __u8 mac_addr[6];
4091 } __packed;
4092
4093 enum {
4094         MWL8K_ENCR_ENABLE,
4095         MWL8K_ENCR_SET_KEY,
4096         MWL8K_ENCR_REMOVE_KEY,
4097         MWL8K_ENCR_SET_GROUP_KEY,
4098 };
4099
4100 #define MWL8K_UPDATE_ENCRYPTION_TYPE_WEP        0
4101 #define MWL8K_UPDATE_ENCRYPTION_TYPE_DISABLE    1
4102 #define MWL8K_UPDATE_ENCRYPTION_TYPE_TKIP       4
4103 #define MWL8K_UPDATE_ENCRYPTION_TYPE_MIXED      7
4104 #define MWL8K_UPDATE_ENCRYPTION_TYPE_AES        8
4105
4106 enum {
4107         MWL8K_ALG_WEP,
4108         MWL8K_ALG_TKIP,
4109         MWL8K_ALG_CCMP,
4110 };
4111
4112 #define MWL8K_KEY_FLAG_TXGROUPKEY       0x00000004
4113 #define MWL8K_KEY_FLAG_PAIRWISE         0x00000008
4114 #define MWL8K_KEY_FLAG_TSC_VALID        0x00000040
4115 #define MWL8K_KEY_FLAG_WEP_TXKEY        0x01000000
4116 #define MWL8K_KEY_FLAG_MICKEY_VALID     0x02000000
4117
4118 static int mwl8k_cmd_update_encryption_enable(struct ieee80211_hw *hw,
4119                                               struct ieee80211_vif *vif,
4120                                               u8 *addr,
4121                                               u8 encr_type)
4122 {
4123         struct mwl8k_cmd_update_encryption *cmd;
4124         int rc;
4125
4126         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4127         if (cmd == NULL)
4128                 return -ENOMEM;
4129
4130         cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_ENCRYPTION);
4131         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4132         cmd->action = cpu_to_le32(MWL8K_ENCR_ENABLE);
4133         memcpy(cmd->mac_addr, addr, ETH_ALEN);
4134         cmd->encr_type = encr_type;
4135
4136         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4137         kfree(cmd);
4138
4139         return rc;
4140 }
4141
4142 static int mwl8k_encryption_set_cmd_info(struct mwl8k_cmd_set_key *cmd,
4143                                                 u8 *addr,
4144                                                 struct ieee80211_key_conf *key)
4145 {
4146         cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_ENCRYPTION);
4147         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4148         cmd->length = cpu_to_le16(sizeof(*cmd) -
4149                                 offsetof(struct mwl8k_cmd_set_key, length));
4150         cmd->key_id = cpu_to_le32(key->keyidx);
4151         cmd->key_len = cpu_to_le16(key->keylen);
4152         memcpy(cmd->mac_addr, addr, ETH_ALEN);
4153
4154         switch (key->cipher) {
4155         case WLAN_CIPHER_SUITE_WEP40:
4156         case WLAN_CIPHER_SUITE_WEP104:
4157                 cmd->key_type_id = cpu_to_le16(MWL8K_ALG_WEP);
4158                 if (key->keyidx == 0)
4159                         cmd->key_info = cpu_to_le32(MWL8K_KEY_FLAG_WEP_TXKEY);
4160
4161                 break;
4162         case WLAN_CIPHER_SUITE_TKIP:
4163                 cmd->key_type_id = cpu_to_le16(MWL8K_ALG_TKIP);
4164                 cmd->key_info = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
4165                         ? cpu_to_le32(MWL8K_KEY_FLAG_PAIRWISE)
4166                         : cpu_to_le32(MWL8K_KEY_FLAG_TXGROUPKEY);
4167                 cmd->key_info |= cpu_to_le32(MWL8K_KEY_FLAG_MICKEY_VALID
4168                                                 | MWL8K_KEY_FLAG_TSC_VALID);
4169                 break;
4170         case WLAN_CIPHER_SUITE_CCMP:
4171                 cmd->key_type_id = cpu_to_le16(MWL8K_ALG_CCMP);
4172                 cmd->key_info = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
4173                         ? cpu_to_le32(MWL8K_KEY_FLAG_PAIRWISE)
4174                         : cpu_to_le32(MWL8K_KEY_FLAG_TXGROUPKEY);
4175                 break;
4176         default:
4177                 return -ENOTSUPP;
4178         }
4179
4180         return 0;
4181 }
4182
4183 static int mwl8k_cmd_encryption_set_key(struct ieee80211_hw *hw,
4184                                                 struct ieee80211_vif *vif,
4185                                                 u8 *addr,
4186                                                 struct ieee80211_key_conf *key)
4187 {
4188         struct mwl8k_cmd_set_key *cmd;
4189         int rc;
4190         int keymlen;
4191         u32 action;
4192         u8 idx;
4193         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4194
4195         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4196         if (cmd == NULL)
4197                 return -ENOMEM;
4198
4199         rc = mwl8k_encryption_set_cmd_info(cmd, addr, key);
4200         if (rc < 0)
4201                 goto done;
4202
4203         idx = key->keyidx;
4204
4205         if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
4206                 action = MWL8K_ENCR_SET_KEY;
4207         else
4208                 action = MWL8K_ENCR_SET_GROUP_KEY;
4209
4210         switch (key->cipher) {
4211         case WLAN_CIPHER_SUITE_WEP40:
4212         case WLAN_CIPHER_SUITE_WEP104:
4213                 if (!mwl8k_vif->wep_key_conf[idx].enabled) {
4214                         memcpy(mwl8k_vif->wep_key_conf[idx].key, key,
4215                                                 sizeof(*key) + key->keylen);
4216                         mwl8k_vif->wep_key_conf[idx].enabled = 1;
4217                 }
4218
4219                 keymlen = key->keylen;
4220                 action = MWL8K_ENCR_SET_KEY;
4221                 break;
4222         case WLAN_CIPHER_SUITE_TKIP:
4223                 keymlen = MAX_ENCR_KEY_LENGTH + 2 * MIC_KEY_LENGTH;
4224                 break;
4225         case WLAN_CIPHER_SUITE_CCMP:
4226                 keymlen = key->keylen;
4227                 break;
4228         default:
4229                 rc = -ENOTSUPP;
4230                 goto done;
4231         }
4232
4233         memcpy(cmd->key_material, key->key, keymlen);
4234         cmd->action = cpu_to_le32(action);
4235
4236         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4237 done:
4238         kfree(cmd);
4239
4240         return rc;
4241 }
4242
4243 static int mwl8k_cmd_encryption_remove_key(struct ieee80211_hw *hw,
4244                                                 struct ieee80211_vif *vif,
4245                                                 u8 *addr,
4246                                                 struct ieee80211_key_conf *key)
4247 {
4248         struct mwl8k_cmd_set_key *cmd;
4249         int rc;
4250         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4251
4252         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4253         if (cmd == NULL)
4254                 return -ENOMEM;
4255
4256         rc = mwl8k_encryption_set_cmd_info(cmd, addr, key);
4257         if (rc < 0)
4258                 goto done;
4259
4260         if (key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
4261                         key->cipher == WLAN_CIPHER_SUITE_WEP104)
4262                 mwl8k_vif->wep_key_conf[key->keyidx].enabled = 0;
4263
4264         cmd->action = cpu_to_le32(MWL8K_ENCR_REMOVE_KEY);
4265
4266         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4267 done:
4268         kfree(cmd);
4269
4270         return rc;
4271 }
4272
4273 static int mwl8k_set_key(struct ieee80211_hw *hw,
4274                          enum set_key_cmd cmd_param,
4275                          struct ieee80211_vif *vif,
4276                          struct ieee80211_sta *sta,
4277                          struct ieee80211_key_conf *key)
4278 {
4279         int rc = 0;
4280         u8 encr_type;
4281         u8 *addr;
4282         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4283         struct mwl8k_priv *priv = hw->priv;
4284
4285         if (vif->type == NL80211_IFTYPE_STATION && !priv->ap_fw)
4286                 return -EOPNOTSUPP;
4287
4288         if (sta == NULL)
4289                 addr = vif->addr;
4290         else
4291                 addr = sta->addr;
4292
4293         if (cmd_param == SET_KEY) {
4294                 rc = mwl8k_cmd_encryption_set_key(hw, vif, addr, key);
4295                 if (rc)
4296                         goto out;
4297
4298                 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40)
4299                                 || (key->cipher == WLAN_CIPHER_SUITE_WEP104))
4300                         encr_type = MWL8K_UPDATE_ENCRYPTION_TYPE_WEP;
4301                 else
4302                         encr_type = MWL8K_UPDATE_ENCRYPTION_TYPE_MIXED;
4303
4304                 rc = mwl8k_cmd_update_encryption_enable(hw, vif, addr,
4305                                                                 encr_type);
4306                 if (rc)
4307                         goto out;
4308
4309                 mwl8k_vif->is_hw_crypto_enabled = true;
4310
4311         } else {
4312                 rc = mwl8k_cmd_encryption_remove_key(hw, vif, addr, key);
4313
4314                 if (rc)
4315                         goto out;
4316         }
4317 out:
4318         return rc;
4319 }
4320
4321 /*
4322  * CMD_UPDATE_STADB.
4323  */
4324 struct ewc_ht_info {
4325         __le16  control1;
4326         __le16  control2;
4327         __le16  control3;
4328 } __packed;
4329
4330 struct peer_capability_info {
4331         /* Peer type - AP vs. STA.  */
4332         __u8    peer_type;
4333
4334         /* Basic 802.11 capabilities from assoc resp.  */
4335         __le16  basic_caps;
4336
4337         /* Set if peer supports 802.11n high throughput (HT).  */
4338         __u8    ht_support;
4339
4340         /* Valid if HT is supported.  */
4341         __le16  ht_caps;
4342         __u8    extended_ht_caps;
4343         struct ewc_ht_info      ewc_info;
4344
4345         /* Legacy rate table. Intersection of our rates and peer rates.  */
4346         __u8    legacy_rates[12];
4347
4348         /* HT rate table. Intersection of our rates and peer rates.  */
4349         __u8    ht_rates[16];
4350         __u8    pad[16];
4351
4352         /* If set, interoperability mode, no proprietary extensions.  */
4353         __u8    interop;
4354         __u8    pad2;
4355         __u8    station_id;
4356         __le16  amsdu_enabled;
4357 } __packed;
4358
4359 struct mwl8k_cmd_update_stadb {
4360         struct mwl8k_cmd_pkt header;
4361
4362         /* See STADB_ACTION_TYPE */
4363         __le32  action;
4364
4365         /* Peer MAC address */
4366         __u8    peer_addr[ETH_ALEN];
4367
4368         __le32  reserved;
4369
4370         /* Peer info - valid during add/update.  */
4371         struct peer_capability_info     peer_info;
4372 } __packed;
4373
4374 #define MWL8K_STA_DB_MODIFY_ENTRY       1
4375 #define MWL8K_STA_DB_DEL_ENTRY          2
4376
4377 /* Peer Entry flags - used to define the type of the peer node */
4378 #define MWL8K_PEER_TYPE_ACCESSPOINT     2
4379
4380 static int mwl8k_cmd_update_stadb_add(struct ieee80211_hw *hw,
4381                                       struct ieee80211_vif *vif,
4382                                       struct ieee80211_sta *sta)
4383 {
4384         struct mwl8k_cmd_update_stadb *cmd;
4385         struct peer_capability_info *p;
4386         u32 rates;
4387         int rc;
4388
4389         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4390         if (cmd == NULL)
4391                 return -ENOMEM;
4392
4393         cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_STADB);
4394         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4395         cmd->action = cpu_to_le32(MWL8K_STA_DB_MODIFY_ENTRY);
4396         memcpy(cmd->peer_addr, sta->addr, ETH_ALEN);
4397
4398         p = &cmd->peer_info;
4399         p->peer_type = MWL8K_PEER_TYPE_ACCESSPOINT;
4400         p->basic_caps = cpu_to_le16(vif->bss_conf.assoc_capability);
4401         p->ht_support = sta->ht_cap.ht_supported;
4402         p->ht_caps = cpu_to_le16(sta->ht_cap.cap);
4403         p->extended_ht_caps = (sta->ht_cap.ampdu_factor & 3) |
4404                 ((sta->ht_cap.ampdu_density & 7) << 2);
4405         if (hw->conf.chandef.chan->band == IEEE80211_BAND_2GHZ)
4406                 rates = sta->supp_rates[IEEE80211_BAND_2GHZ];
4407         else
4408                 rates = sta->supp_rates[IEEE80211_BAND_5GHZ] << 5;
4409         legacy_rate_mask_to_array(p->legacy_rates, rates);
4410         memcpy(p->ht_rates, sta->ht_cap.mcs.rx_mask, 16);
4411         p->interop = 1;
4412         p->amsdu_enabled = 0;
4413
4414         rc = mwl8k_post_cmd(hw, &cmd->header);
4415         if (!rc)
4416                 rc = p->station_id;
4417         kfree(cmd);
4418
4419         return rc;
4420 }
4421
4422 static int mwl8k_cmd_update_stadb_del(struct ieee80211_hw *hw,
4423                                       struct ieee80211_vif *vif, u8 *addr)
4424 {
4425         struct mwl8k_cmd_update_stadb *cmd;
4426         int rc;
4427
4428         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4429         if (cmd == NULL)
4430                 return -ENOMEM;
4431
4432         cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_STADB);
4433         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4434         cmd->action = cpu_to_le32(MWL8K_STA_DB_DEL_ENTRY);
4435         memcpy(cmd->peer_addr, addr, ETH_ALEN);
4436
4437         rc = mwl8k_post_cmd(hw, &cmd->header);
4438         kfree(cmd);
4439
4440         return rc;
4441 }
4442
4443
4444 /*
4445  * Interrupt handling.
4446  */
4447 static irqreturn_t mwl8k_interrupt(int irq, void *dev_id)
4448 {
4449         struct ieee80211_hw *hw = dev_id;
4450         struct mwl8k_priv *priv = hw->priv;
4451         u32 status;
4452
4453         status = ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4454         if (!status)
4455                 return IRQ_NONE;
4456
4457         if (status & MWL8K_A2H_INT_TX_DONE) {
4458                 status &= ~MWL8K_A2H_INT_TX_DONE;
4459                 tasklet_schedule(&priv->poll_tx_task);
4460         }
4461
4462         if (status & MWL8K_A2H_INT_RX_READY) {
4463                 status &= ~MWL8K_A2H_INT_RX_READY;
4464                 tasklet_schedule(&priv->poll_rx_task);
4465         }
4466
4467         if (status & MWL8K_A2H_INT_BA_WATCHDOG) {
4468                 iowrite32(~MWL8K_A2H_INT_BA_WATCHDOG,
4469                           priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
4470
4471                 atomic_inc(&priv->watchdog_event_pending);
4472                 status &= ~MWL8K_A2H_INT_BA_WATCHDOG;
4473                 ieee80211_queue_work(hw, &priv->watchdog_ba_handle);
4474         }
4475
4476         if (status)
4477                 iowrite32(~status, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4478
4479         if (status & MWL8K_A2H_INT_OPC_DONE) {
4480                 if (priv->hostcmd_wait != NULL)
4481                         complete(priv->hostcmd_wait);
4482         }
4483
4484         if (status & MWL8K_A2H_INT_QUEUE_EMPTY) {
4485                 if (!mutex_is_locked(&priv->fw_mutex) &&
4486                     priv->radio_on && priv->pending_tx_pkts)
4487                         mwl8k_tx_start(priv);
4488         }
4489
4490         return IRQ_HANDLED;
4491 }
4492
4493 static void mwl8k_tx_poll(unsigned long data)
4494 {
4495         struct ieee80211_hw *hw = (struct ieee80211_hw *)data;
4496         struct mwl8k_priv *priv = hw->priv;
4497         int limit;
4498         int i;
4499
4500         limit = 32;
4501
4502         spin_lock_bh(&priv->tx_lock);
4503
4504         for (i = 0; i < mwl8k_tx_queues(priv); i++)
4505                 limit -= mwl8k_txq_reclaim(hw, i, limit, 0);
4506
4507         if (!priv->pending_tx_pkts && priv->tx_wait != NULL) {
4508                 complete(priv->tx_wait);
4509                 priv->tx_wait = NULL;
4510         }
4511
4512         spin_unlock_bh(&priv->tx_lock);
4513
4514         if (limit) {
4515                 writel(~MWL8K_A2H_INT_TX_DONE,
4516                        priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4517         } else {
4518                 tasklet_schedule(&priv->poll_tx_task);
4519         }
4520 }
4521
4522 static void mwl8k_rx_poll(unsigned long data)
4523 {
4524         struct ieee80211_hw *hw = (struct ieee80211_hw *)data;
4525         struct mwl8k_priv *priv = hw->priv;
4526         int limit;
4527
4528         limit = 32;
4529         limit -= rxq_process(hw, 0, limit);
4530         limit -= rxq_refill(hw, 0, limit);
4531
4532         if (limit) {
4533                 writel(~MWL8K_A2H_INT_RX_READY,
4534                        priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4535         } else {
4536                 tasklet_schedule(&priv->poll_rx_task);
4537         }
4538 }
4539
4540
4541 /*
4542  * Core driver operations.
4543  */
4544 static void mwl8k_tx(struct ieee80211_hw *hw,
4545                      struct ieee80211_tx_control *control,
4546                      struct sk_buff *skb)
4547 {
4548         struct mwl8k_priv *priv = hw->priv;
4549         int index = skb_get_queue_mapping(skb);
4550
4551         if (!priv->radio_on) {
4552                 wiphy_debug(hw->wiphy,
4553                             "dropped TX frame since radio disabled\n");
4554                 dev_kfree_skb(skb);
4555                 return;
4556         }
4557
4558         mwl8k_txq_xmit(hw, index, control->sta, skb);
4559 }
4560
4561 static int mwl8k_start(struct ieee80211_hw *hw)
4562 {
4563         struct mwl8k_priv *priv = hw->priv;
4564         int rc;
4565
4566         rc = request_irq(priv->pdev->irq, mwl8k_interrupt,
4567                          IRQF_SHARED, MWL8K_NAME, hw);
4568         if (rc) {
4569                 priv->irq = -1;
4570                 wiphy_err(hw->wiphy, "failed to register IRQ handler\n");
4571                 return -EIO;
4572         }
4573         priv->irq = priv->pdev->irq;
4574
4575         /* Enable TX reclaim and RX tasklets.  */
4576         tasklet_enable(&priv->poll_tx_task);
4577         tasklet_enable(&priv->poll_rx_task);
4578
4579         /* Enable interrupts */
4580         iowrite32(MWL8K_A2H_EVENTS, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
4581         iowrite32(MWL8K_A2H_EVENTS,
4582                   priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
4583
4584         rc = mwl8k_fw_lock(hw);
4585         if (!rc) {
4586                 rc = mwl8k_cmd_radio_enable(hw);
4587
4588                 if (!priv->ap_fw) {
4589                         if (!rc)
4590                                 rc = mwl8k_cmd_enable_sniffer(hw, 0);
4591
4592                         if (!rc)
4593                                 rc = mwl8k_cmd_set_pre_scan(hw);
4594
4595                         if (!rc)
4596                                 rc = mwl8k_cmd_set_post_scan(hw,
4597                                                 "\x00\x00\x00\x00\x00\x00");
4598                 }
4599
4600                 if (!rc)
4601                         rc = mwl8k_cmd_set_rateadapt_mode(hw, 0);
4602
4603                 if (!rc)
4604                         rc = mwl8k_cmd_set_wmm_mode(hw, 0);
4605
4606                 mwl8k_fw_unlock(hw);
4607         }
4608
4609         if (rc) {
4610                 iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
4611                 free_irq(priv->pdev->irq, hw);
4612                 priv->irq = -1;
4613                 tasklet_disable(&priv->poll_tx_task);
4614                 tasklet_disable(&priv->poll_rx_task);
4615         } else {
4616                 ieee80211_wake_queues(hw);
4617         }
4618
4619         return rc;
4620 }
4621
4622 static void mwl8k_stop(struct ieee80211_hw *hw)
4623 {
4624         struct mwl8k_priv *priv = hw->priv;
4625         int i;
4626
4627         if (!priv->hw_restart_in_progress)
4628                 mwl8k_cmd_radio_disable(hw);
4629
4630         ieee80211_stop_queues(hw);
4631
4632         /* Disable interrupts */
4633         iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
4634         if (priv->irq != -1) {
4635                 free_irq(priv->pdev->irq, hw);
4636                 priv->irq = -1;
4637         }
4638
4639         /* Stop finalize join worker */
4640         cancel_work_sync(&priv->finalize_join_worker);
4641         cancel_work_sync(&priv->watchdog_ba_handle);
4642         if (priv->beacon_skb != NULL)
4643                 dev_kfree_skb(priv->beacon_skb);
4644
4645         /* Stop TX reclaim and RX tasklets.  */
4646         tasklet_disable(&priv->poll_tx_task);
4647         tasklet_disable(&priv->poll_rx_task);
4648
4649         /* Return all skbs to mac80211 */
4650         for (i = 0; i < mwl8k_tx_queues(priv); i++)
4651                 mwl8k_txq_reclaim(hw, i, INT_MAX, 1);
4652 }
4653
4654 static int mwl8k_reload_firmware(struct ieee80211_hw *hw, char *fw_image);
4655
4656 static int mwl8k_add_interface(struct ieee80211_hw *hw,
4657                                struct ieee80211_vif *vif)
4658 {
4659         struct mwl8k_priv *priv = hw->priv;
4660         struct mwl8k_vif *mwl8k_vif;
4661         u32 macids_supported;
4662         int macid, rc;
4663         struct mwl8k_device_info *di;
4664
4665         /*
4666          * Reject interface creation if sniffer mode is active, as
4667          * STA operation is mutually exclusive with hardware sniffer
4668          * mode.  (Sniffer mode is only used on STA firmware.)
4669          */
4670         if (priv->sniffer_enabled) {
4671                 wiphy_info(hw->wiphy,
4672                            "unable to create STA interface because sniffer mode is enabled\n");
4673                 return -EINVAL;
4674         }
4675
4676         di = priv->device_info;
4677         switch (vif->type) {
4678         case NL80211_IFTYPE_AP:
4679                 if (!priv->ap_fw && di->fw_image_ap) {
4680                         /* we must load the ap fw to meet this request */
4681                         if (!list_empty(&priv->vif_list))
4682                                 return -EBUSY;
4683                         rc = mwl8k_reload_firmware(hw, di->fw_image_ap);
4684                         if (rc)
4685                                 return rc;
4686                 }
4687                 macids_supported = priv->ap_macids_supported;
4688                 break;
4689         case NL80211_IFTYPE_STATION:
4690                 if (priv->ap_fw && di->fw_image_sta) {
4691                         if (!list_empty(&priv->vif_list)) {
4692                                 wiphy_warn(hw->wiphy, "AP interface is running.\n"
4693                                            "Adding STA interface for WDS");
4694                         } else {
4695                                 /* we must load the sta fw to
4696                                  * meet this request.
4697                                  */
4698                                 rc = mwl8k_reload_firmware(hw,
4699                                                            di->fw_image_sta);
4700                                 if (rc)
4701                                         return rc;
4702                         }
4703                 }
4704                 macids_supported = priv->sta_macids_supported;
4705                 break;
4706         default:
4707                 return -EINVAL;
4708         }
4709
4710         macid = ffs(macids_supported & ~priv->macids_used);
4711         if (!macid--)
4712                 return -EBUSY;
4713
4714         /* Setup driver private area. */
4715         mwl8k_vif = MWL8K_VIF(vif);
4716         memset(mwl8k_vif, 0, sizeof(*mwl8k_vif));
4717         mwl8k_vif->vif = vif;
4718         mwl8k_vif->macid = macid;
4719         mwl8k_vif->seqno = 0;
4720         memcpy(mwl8k_vif->bssid, vif->addr, ETH_ALEN);
4721         mwl8k_vif->is_hw_crypto_enabled = false;
4722
4723         /* Set the mac address.  */
4724         mwl8k_cmd_set_mac_addr(hw, vif, vif->addr);
4725
4726         if (vif->type == NL80211_IFTYPE_AP)
4727                 mwl8k_cmd_set_new_stn_add_self(hw, vif);
4728
4729         priv->macids_used |= 1 << mwl8k_vif->macid;
4730         list_add_tail(&mwl8k_vif->list, &priv->vif_list);
4731
4732         return 0;
4733 }
4734
4735 static void mwl8k_remove_vif(struct mwl8k_priv *priv, struct mwl8k_vif *vif)
4736 {
4737         /* Has ieee80211_restart_hw re-added the removed interfaces? */
4738         if (!priv->macids_used)
4739                 return;
4740
4741         priv->macids_used &= ~(1 << vif->macid);
4742         list_del(&vif->list);
4743 }
4744
4745 static void mwl8k_remove_interface(struct ieee80211_hw *hw,
4746                                    struct ieee80211_vif *vif)
4747 {
4748         struct mwl8k_priv *priv = hw->priv;
4749         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4750
4751         if (vif->type == NL80211_IFTYPE_AP)
4752                 mwl8k_cmd_set_new_stn_del(hw, vif, vif->addr);
4753
4754         mwl8k_cmd_del_mac_addr(hw, vif, vif->addr);
4755
4756         mwl8k_remove_vif(priv, mwl8k_vif);
4757 }
4758
4759 static void mwl8k_hw_restart_work(struct work_struct *work)
4760 {
4761         struct mwl8k_priv *priv =
4762                 container_of(work, struct mwl8k_priv, fw_reload);
4763         struct ieee80211_hw *hw = priv->hw;
4764         struct mwl8k_device_info *di;
4765         int rc;
4766
4767         /* If some command is waiting for a response, clear it */
4768         if (priv->hostcmd_wait != NULL) {
4769                 complete(priv->hostcmd_wait);
4770                 priv->hostcmd_wait = NULL;
4771         }
4772
4773         priv->hw_restart_owner = current;
4774         di = priv->device_info;
4775         mwl8k_fw_lock(hw);
4776
4777         if (priv->ap_fw)
4778                 rc = mwl8k_reload_firmware(hw, di->fw_image_ap);
4779         else
4780                 rc = mwl8k_reload_firmware(hw, di->fw_image_sta);
4781
4782         if (rc)
4783                 goto fail;
4784
4785         priv->hw_restart_owner = NULL;
4786         priv->hw_restart_in_progress = false;
4787
4788         /*
4789          * This unlock will wake up the queues and
4790          * also opens the command path for other
4791          * commands
4792          */
4793         mwl8k_fw_unlock(hw);
4794
4795         ieee80211_restart_hw(hw);
4796
4797         wiphy_err(hw->wiphy, "Firmware restarted successfully\n");
4798
4799         return;
4800 fail:
4801         mwl8k_fw_unlock(hw);
4802
4803         wiphy_err(hw->wiphy, "Firmware restart failed\n");
4804 }
4805
4806 static int mwl8k_config(struct ieee80211_hw *hw, u32 changed)
4807 {
4808         struct ieee80211_conf *conf = &hw->conf;
4809         struct mwl8k_priv *priv = hw->priv;
4810         int rc;
4811
4812         rc = mwl8k_fw_lock(hw);
4813         if (rc)
4814                 return rc;
4815
4816         if (conf->flags & IEEE80211_CONF_IDLE)
4817                 rc = mwl8k_cmd_radio_disable(hw);
4818         else
4819                 rc = mwl8k_cmd_radio_enable(hw);
4820         if (rc)
4821                 goto out;
4822
4823         if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
4824                 rc = mwl8k_cmd_set_rf_channel(hw, conf);
4825                 if (rc)
4826                         goto out;
4827         }
4828
4829         if (conf->power_level > 18)
4830                 conf->power_level = 18;
4831
4832         if (priv->ap_fw) {
4833
4834                 if (conf->flags & IEEE80211_CONF_CHANGE_POWER) {
4835                         rc = mwl8k_cmd_tx_power(hw, conf, conf->power_level);
4836                         if (rc)
4837                                 goto out;
4838                 }
4839
4840
4841         } else {
4842                 rc = mwl8k_cmd_rf_tx_power(hw, conf->power_level);
4843                 if (rc)
4844                         goto out;
4845                 rc = mwl8k_cmd_mimo_config(hw, 0x7, 0x7);
4846         }
4847
4848 out:
4849         mwl8k_fw_unlock(hw);
4850
4851         return rc;
4852 }
4853
4854 static void
4855 mwl8k_bss_info_changed_sta(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4856                            struct ieee80211_bss_conf *info, u32 changed)
4857 {
4858         struct mwl8k_priv *priv = hw->priv;
4859         u32 ap_legacy_rates = 0;
4860         u8 ap_mcs_rates[16];
4861         int rc;
4862
4863         if (mwl8k_fw_lock(hw))
4864                 return;
4865
4866         /*
4867          * No need to capture a beacon if we're no longer associated.
4868          */
4869         if ((changed & BSS_CHANGED_ASSOC) && !vif->bss_conf.assoc)
4870                 priv->capture_beacon = false;
4871
4872         /*
4873          * Get the AP's legacy and MCS rates.
4874          */
4875         if (vif->bss_conf.assoc) {
4876                 struct ieee80211_sta *ap;
4877
4878                 rcu_read_lock();
4879
4880                 ap = ieee80211_find_sta(vif, vif->bss_conf.bssid);
4881                 if (ap == NULL) {
4882                         rcu_read_unlock();
4883                         goto out;
4884                 }
4885
4886                 if (hw->conf.chandef.chan->band == IEEE80211_BAND_2GHZ) {
4887                         ap_legacy_rates = ap->supp_rates[IEEE80211_BAND_2GHZ];
4888                 } else {
4889                         ap_legacy_rates =
4890                                 ap->supp_rates[IEEE80211_BAND_5GHZ] << 5;
4891                 }
4892                 memcpy(ap_mcs_rates, ap->ht_cap.mcs.rx_mask, 16);
4893
4894                 rcu_read_unlock();
4895         }
4896
4897         if ((changed & BSS_CHANGED_ASSOC) && vif->bss_conf.assoc &&
4898             !priv->ap_fw) {
4899                 rc = mwl8k_cmd_set_rate(hw, vif, ap_legacy_rates, ap_mcs_rates);
4900                 if (rc)
4901                         goto out;
4902
4903                 rc = mwl8k_cmd_use_fixed_rate_sta(hw);
4904                 if (rc)
4905                         goto out;
4906         } else {
4907                 if ((changed & BSS_CHANGED_ASSOC) && vif->bss_conf.assoc &&
4908                     priv->ap_fw) {
4909                         int idx;
4910                         int rate;
4911
4912                         /* Use AP firmware specific rate command.
4913                          */
4914                         idx = ffs(vif->bss_conf.basic_rates);
4915                         if (idx)
4916                                 idx--;
4917
4918                         if (hw->conf.chandef.chan->band == IEEE80211_BAND_2GHZ)
4919                                 rate = mwl8k_rates_24[idx].hw_value;
4920                         else
4921                                 rate = mwl8k_rates_50[idx].hw_value;
4922
4923                         mwl8k_cmd_use_fixed_rate_ap(hw, rate, rate);
4924                 }
4925         }
4926
4927         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
4928                 rc = mwl8k_set_radio_preamble(hw,
4929                                 vif->bss_conf.use_short_preamble);
4930                 if (rc)
4931                         goto out;
4932         }
4933
4934         if ((changed & BSS_CHANGED_ERP_SLOT) && !priv->ap_fw)  {
4935                 rc = mwl8k_cmd_set_slot(hw, vif->bss_conf.use_short_slot);
4936                 if (rc)
4937                         goto out;
4938         }
4939
4940         if (vif->bss_conf.assoc && !priv->ap_fw &&
4941             (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_ERP_CTS_PROT |
4942                         BSS_CHANGED_HT))) {
4943                 rc = mwl8k_cmd_set_aid(hw, vif, ap_legacy_rates);
4944                 if (rc)
4945                         goto out;
4946         }
4947
4948         if (vif->bss_conf.assoc &&
4949             (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_BEACON_INT))) {
4950                 /*
4951                  * Finalize the join.  Tell rx handler to process
4952                  * next beacon from our BSSID.
4953                  */
4954                 memcpy(priv->capture_bssid, vif->bss_conf.bssid, ETH_ALEN);
4955                 priv->capture_beacon = true;
4956         }
4957
4958 out:
4959         mwl8k_fw_unlock(hw);
4960 }
4961
4962 static void
4963 mwl8k_bss_info_changed_ap(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4964                           struct ieee80211_bss_conf *info, u32 changed)
4965 {
4966         int rc;
4967
4968         if (mwl8k_fw_lock(hw))
4969                 return;
4970
4971         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
4972                 rc = mwl8k_set_radio_preamble(hw,
4973                                 vif->bss_conf.use_short_preamble);
4974                 if (rc)
4975                         goto out;
4976         }
4977
4978         if (changed & BSS_CHANGED_BASIC_RATES) {
4979                 int idx;
4980                 int rate;
4981
4982                 /*
4983                  * Use lowest supported basic rate for multicasts
4984                  * and management frames (such as probe responses --
4985                  * beacons will always go out at 1 Mb/s).
4986                  */
4987                 idx = ffs(vif->bss_conf.basic_rates);
4988                 if (idx)
4989                         idx--;
4990
4991                 if (hw->conf.chandef.chan->band == IEEE80211_BAND_2GHZ)
4992                         rate = mwl8k_rates_24[idx].hw_value;
4993                 else
4994                         rate = mwl8k_rates_50[idx].hw_value;
4995
4996                 mwl8k_cmd_use_fixed_rate_ap(hw, rate, rate);
4997         }
4998
4999         if (changed & (BSS_CHANGED_BEACON_INT | BSS_CHANGED_BEACON)) {
5000                 struct sk_buff *skb;
5001
5002                 skb = ieee80211_beacon_get(hw, vif);
5003                 if (skb != NULL) {
5004                         mwl8k_cmd_set_beacon(hw, vif, skb->data, skb->len);
5005                         kfree_skb(skb);
5006                 }
5007         }
5008
5009         if (changed & BSS_CHANGED_BEACON_ENABLED)
5010                 mwl8k_cmd_bss_start(hw, vif, info->enable_beacon);
5011
5012 out:
5013         mwl8k_fw_unlock(hw);
5014 }
5015
5016 static void
5017 mwl8k_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5018                        struct ieee80211_bss_conf *info, u32 changed)
5019 {
5020         if (vif->type == NL80211_IFTYPE_STATION)
5021                 mwl8k_bss_info_changed_sta(hw, vif, info, changed);
5022         if (vif->type == NL80211_IFTYPE_AP)
5023                 mwl8k_bss_info_changed_ap(hw, vif, info, changed);
5024 }
5025
5026 static u64 mwl8k_prepare_multicast(struct ieee80211_hw *hw,
5027                                    struct netdev_hw_addr_list *mc_list)
5028 {
5029         struct mwl8k_cmd_pkt *cmd;
5030
5031         /*
5032          * Synthesize and return a command packet that programs the
5033          * hardware multicast address filter.  At this point we don't
5034          * know whether FIF_ALLMULTI is being requested, but if it is,
5035          * we'll end up throwing this packet away and creating a new
5036          * one in mwl8k_configure_filter().
5037          */
5038         cmd = __mwl8k_cmd_mac_multicast_adr(hw, 0, mc_list);
5039
5040         return (unsigned long)cmd;
5041 }
5042
5043 static int
5044 mwl8k_configure_filter_sniffer(struct ieee80211_hw *hw,
5045                                unsigned int changed_flags,
5046                                unsigned int *total_flags)
5047 {
5048         struct mwl8k_priv *priv = hw->priv;
5049
5050         /*
5051          * Hardware sniffer mode is mutually exclusive with STA
5052          * operation, so refuse to enable sniffer mode if a STA
5053          * interface is active.
5054          */
5055         if (!list_empty(&priv->vif_list)) {
5056                 if (net_ratelimit())
5057                         wiphy_info(hw->wiphy,
5058                                    "not enabling sniffer mode because STA interface is active\n");
5059                 return 0;
5060         }
5061
5062         if (!priv->sniffer_enabled) {
5063                 if (mwl8k_cmd_enable_sniffer(hw, 1))
5064                         return 0;
5065                 priv->sniffer_enabled = true;
5066         }
5067
5068         *total_flags &= FIF_PROMISC_IN_BSS | FIF_ALLMULTI |
5069                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL |
5070                         FIF_OTHER_BSS;
5071
5072         return 1;
5073 }
5074
5075 static struct mwl8k_vif *mwl8k_first_vif(struct mwl8k_priv *priv)
5076 {
5077         if (!list_empty(&priv->vif_list))
5078                 return list_entry(priv->vif_list.next, struct mwl8k_vif, list);
5079
5080         return NULL;
5081 }
5082
5083 static void mwl8k_configure_filter(struct ieee80211_hw *hw,
5084                                    unsigned int changed_flags,
5085                                    unsigned int *total_flags,
5086                                    u64 multicast)
5087 {
5088         struct mwl8k_priv *priv = hw->priv;
5089         struct mwl8k_cmd_pkt *cmd = (void *)(unsigned long)multicast;
5090
5091         /*
5092          * AP firmware doesn't allow fine-grained control over
5093          * the receive filter.
5094          */
5095         if (priv->ap_fw) {
5096                 *total_flags &= FIF_ALLMULTI | FIF_BCN_PRBRESP_PROMISC;
5097                 kfree(cmd);
5098                 return;
5099         }
5100
5101         /*
5102          * Enable hardware sniffer mode if FIF_CONTROL or
5103          * FIF_OTHER_BSS is requested.
5104          */
5105         if (*total_flags & (FIF_CONTROL | FIF_OTHER_BSS) &&
5106             mwl8k_configure_filter_sniffer(hw, changed_flags, total_flags)) {
5107                 kfree(cmd);
5108                 return;
5109         }
5110
5111         /* Clear unsupported feature flags */
5112         *total_flags &= FIF_ALLMULTI | FIF_BCN_PRBRESP_PROMISC;
5113
5114         if (mwl8k_fw_lock(hw)) {
5115                 kfree(cmd);
5116                 return;
5117         }
5118
5119         if (priv->sniffer_enabled) {
5120                 mwl8k_cmd_enable_sniffer(hw, 0);
5121                 priv->sniffer_enabled = false;
5122         }
5123
5124         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
5125                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC) {
5126                         /*
5127                          * Disable the BSS filter.
5128                          */
5129                         mwl8k_cmd_set_pre_scan(hw);
5130                 } else {
5131                         struct mwl8k_vif *mwl8k_vif;
5132                         const u8 *bssid;
5133
5134                         /*
5135                          * Enable the BSS filter.
5136                          *
5137                          * If there is an active STA interface, use that
5138                          * interface's BSSID, otherwise use a dummy one
5139                          * (where the OUI part needs to be nonzero for
5140                          * the BSSID to be accepted by POST_SCAN).
5141                          */
5142                         mwl8k_vif = mwl8k_first_vif(priv);
5143                         if (mwl8k_vif != NULL)
5144                                 bssid = mwl8k_vif->vif->bss_conf.bssid;
5145                         else
5146                                 bssid = "\x01\x00\x00\x00\x00\x00";
5147
5148                         mwl8k_cmd_set_post_scan(hw, bssid);
5149                 }
5150         }
5151
5152         /*
5153          * If FIF_ALLMULTI is being requested, throw away the command
5154          * packet that ->prepare_multicast() built and replace it with
5155          * a command packet that enables reception of all multicast
5156          * packets.
5157          */
5158         if (*total_flags & FIF_ALLMULTI) {
5159                 kfree(cmd);
5160                 cmd = __mwl8k_cmd_mac_multicast_adr(hw, 1, NULL);
5161         }
5162
5163         if (cmd != NULL) {
5164                 mwl8k_post_cmd(hw, cmd);
5165                 kfree(cmd);
5166         }
5167
5168         mwl8k_fw_unlock(hw);
5169 }
5170
5171 static int mwl8k_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
5172 {
5173         return mwl8k_cmd_set_rts_threshold(hw, value);
5174 }
5175
5176 static int mwl8k_sta_remove(struct ieee80211_hw *hw,
5177                             struct ieee80211_vif *vif,
5178                             struct ieee80211_sta *sta)
5179 {
5180         struct mwl8k_priv *priv = hw->priv;
5181
5182         if (priv->ap_fw)
5183                 return mwl8k_cmd_set_new_stn_del(hw, vif, sta->addr);
5184         else
5185                 return mwl8k_cmd_update_stadb_del(hw, vif, sta->addr);
5186 }
5187
5188 static int mwl8k_sta_add(struct ieee80211_hw *hw,
5189                          struct ieee80211_vif *vif,
5190                          struct ieee80211_sta *sta)
5191 {
5192         struct mwl8k_priv *priv = hw->priv;
5193         int ret;
5194         int i;
5195         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
5196         struct ieee80211_key_conf *key;
5197
5198         if (!priv->ap_fw) {
5199                 ret = mwl8k_cmd_update_stadb_add(hw, vif, sta);
5200                 if (ret >= 0) {
5201                         MWL8K_STA(sta)->peer_id = ret;
5202                         if (sta->ht_cap.ht_supported)
5203                                 MWL8K_STA(sta)->is_ampdu_allowed = true;
5204                         ret = 0;
5205                 }
5206
5207         } else {
5208                 ret = mwl8k_cmd_set_new_stn_add(hw, vif, sta);
5209         }
5210
5211         for (i = 0; i < NUM_WEP_KEYS; i++) {
5212                 key = IEEE80211_KEY_CONF(mwl8k_vif->wep_key_conf[i].key);
5213                 if (mwl8k_vif->wep_key_conf[i].enabled)
5214                         mwl8k_set_key(hw, SET_KEY, vif, sta, key);
5215         }
5216         return ret;
5217 }
5218
5219 static int mwl8k_conf_tx(struct ieee80211_hw *hw,
5220                          struct ieee80211_vif *vif, u16 queue,
5221                          const struct ieee80211_tx_queue_params *params)
5222 {
5223         struct mwl8k_priv *priv = hw->priv;
5224         int rc;
5225
5226         rc = mwl8k_fw_lock(hw);
5227         if (!rc) {
5228                 BUG_ON(queue > MWL8K_TX_WMM_QUEUES - 1);
5229                 memcpy(&priv->wmm_params[queue], params, sizeof(*params));
5230
5231                 if (!priv->wmm_enabled)
5232                         rc = mwl8k_cmd_set_wmm_mode(hw, 1);
5233
5234                 if (!rc) {
5235                         int q = MWL8K_TX_WMM_QUEUES - 1 - queue;
5236                         rc = mwl8k_cmd_set_edca_params(hw, q,
5237                                                        params->cw_min,
5238                                                        params->cw_max,
5239                                                        params->aifs,
5240                                                        params->txop);
5241                 }
5242
5243                 mwl8k_fw_unlock(hw);
5244         }
5245
5246         return rc;
5247 }
5248
5249 static int mwl8k_get_stats(struct ieee80211_hw *hw,
5250                            struct ieee80211_low_level_stats *stats)
5251 {
5252         return mwl8k_cmd_get_stat(hw, stats);
5253 }
5254
5255 static int mwl8k_get_survey(struct ieee80211_hw *hw, int idx,
5256                                 struct survey_info *survey)
5257 {
5258         struct mwl8k_priv *priv = hw->priv;
5259         struct ieee80211_conf *conf = &hw->conf;
5260
5261         if (idx != 0)
5262                 return -ENOENT;
5263
5264         survey->channel = conf->chandef.chan;
5265         survey->filled = SURVEY_INFO_NOISE_DBM;
5266         survey->noise = priv->noise;
5267
5268         return 0;
5269 }
5270
5271 #define MAX_AMPDU_ATTEMPTS 5
5272
5273 static int
5274 mwl8k_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5275                    enum ieee80211_ampdu_mlme_action action,
5276                    struct ieee80211_sta *sta, u16 tid, u16 *ssn,
5277                    u8 buf_size)
5278 {
5279
5280         int i, rc = 0;
5281         struct mwl8k_priv *priv = hw->priv;
5282         struct mwl8k_ampdu_stream *stream;
5283         u8 *addr = sta->addr, idx;
5284         struct mwl8k_sta *sta_info = MWL8K_STA(sta);
5285
5286         if (!(hw->flags & IEEE80211_HW_AMPDU_AGGREGATION))
5287                 return -ENOTSUPP;
5288
5289         spin_lock(&priv->stream_lock);
5290         stream = mwl8k_lookup_stream(hw, addr, tid);
5291
5292         switch (action) {
5293         case IEEE80211_AMPDU_RX_START:
5294         case IEEE80211_AMPDU_RX_STOP:
5295                 break;
5296         case IEEE80211_AMPDU_TX_START:
5297                 /* By the time we get here the hw queues may contain outgoing
5298                  * packets for this RA/TID that are not part of this BA
5299                  * session.  The hw will assign sequence numbers to these
5300                  * packets as they go out.  So if we query the hw for its next
5301                  * sequence number and use that for the SSN here, it may end up
5302                  * being wrong, which will lead to sequence number mismatch at
5303                  * the recipient.  To avoid this, we reset the sequence number
5304                  * to O for the first MPDU in this BA stream.
5305                  */
5306                 *ssn = 0;
5307                 if (stream == NULL) {
5308                         /* This means that somebody outside this driver called
5309                          * ieee80211_start_tx_ba_session.  This is unexpected
5310                          * because we do our own rate control.  Just warn and
5311                          * move on.
5312                          */
5313                         wiphy_warn(hw->wiphy, "Unexpected call to %s.  "
5314                                    "Proceeding anyway.\n", __func__);
5315                         stream = mwl8k_add_stream(hw, sta, tid);
5316                 }
5317                 if (stream == NULL) {
5318                         wiphy_debug(hw->wiphy, "no free AMPDU streams\n");
5319                         rc = -EBUSY;
5320                         break;
5321                 }
5322                 stream->state = AMPDU_STREAM_IN_PROGRESS;
5323
5324                 /* Release the lock before we do the time consuming stuff */
5325                 spin_unlock(&priv->stream_lock);
5326                 for (i = 0; i < MAX_AMPDU_ATTEMPTS; i++) {
5327
5328                         /* Check if link is still valid */
5329                         if (!sta_info->is_ampdu_allowed) {
5330                                 spin_lock(&priv->stream_lock);
5331                                 mwl8k_remove_stream(hw, stream);
5332                                 spin_unlock(&priv->stream_lock);
5333                                 return -EBUSY;
5334                         }
5335
5336                         rc = mwl8k_check_ba(hw, stream, vif);
5337
5338                         /* If HW restart is in progress mwl8k_post_cmd will
5339                          * return -EBUSY. Avoid retrying mwl8k_check_ba in
5340                          * such cases
5341                          */
5342                         if (!rc || rc == -EBUSY)
5343                                 break;
5344                         /*
5345                          * HW queues take time to be flushed, give them
5346                          * sufficient time
5347                          */
5348
5349                         msleep(1000);
5350                 }
5351                 spin_lock(&priv->stream_lock);
5352                 if (rc) {
5353                         wiphy_err(hw->wiphy, "Stream for tid %d busy after %d"
5354                                 " attempts\n", tid, MAX_AMPDU_ATTEMPTS);
5355                         mwl8k_remove_stream(hw, stream);
5356                         rc = -EBUSY;
5357                         break;
5358                 }
5359                 ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid);
5360                 break;
5361         case IEEE80211_AMPDU_TX_STOP_CONT:
5362         case IEEE80211_AMPDU_TX_STOP_FLUSH:
5363         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
5364                 if (stream) {
5365                         if (stream->state == AMPDU_STREAM_ACTIVE) {
5366                                 idx = stream->idx;
5367                                 spin_unlock(&priv->stream_lock);
5368                                 mwl8k_destroy_ba(hw, idx);
5369                                 spin_lock(&priv->stream_lock);
5370                         }
5371                         mwl8k_remove_stream(hw, stream);
5372                 }
5373                 ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
5374                 break;
5375         case IEEE80211_AMPDU_TX_OPERATIONAL:
5376                 BUG_ON(stream == NULL);
5377                 BUG_ON(stream->state != AMPDU_STREAM_IN_PROGRESS);
5378                 spin_unlock(&priv->stream_lock);
5379                 rc = mwl8k_create_ba(hw, stream, buf_size, vif);
5380                 spin_lock(&priv->stream_lock);
5381                 if (!rc)
5382                         stream->state = AMPDU_STREAM_ACTIVE;
5383                 else {
5384                         idx = stream->idx;
5385                         spin_unlock(&priv->stream_lock);
5386                         mwl8k_destroy_ba(hw, idx);
5387                         spin_lock(&priv->stream_lock);
5388                         wiphy_debug(hw->wiphy,
5389                                 "Failed adding stream for sta %pM tid %d\n",
5390                                 addr, tid);
5391                         mwl8k_remove_stream(hw, stream);
5392                 }
5393                 break;
5394
5395         default:
5396                 rc = -ENOTSUPP;
5397         }
5398
5399         spin_unlock(&priv->stream_lock);
5400         return rc;
5401 }
5402
5403 static const struct ieee80211_ops mwl8k_ops = {
5404         .tx                     = mwl8k_tx,
5405         .start                  = mwl8k_start,
5406         .stop                   = mwl8k_stop,
5407         .add_interface          = mwl8k_add_interface,
5408         .remove_interface       = mwl8k_remove_interface,
5409         .config                 = mwl8k_config,
5410         .bss_info_changed       = mwl8k_bss_info_changed,
5411         .prepare_multicast      = mwl8k_prepare_multicast,
5412         .configure_filter       = mwl8k_configure_filter,
5413         .set_key                = mwl8k_set_key,
5414         .set_rts_threshold      = mwl8k_set_rts_threshold,
5415         .sta_add                = mwl8k_sta_add,
5416         .sta_remove             = mwl8k_sta_remove,
5417         .conf_tx                = mwl8k_conf_tx,
5418         .get_stats              = mwl8k_get_stats,
5419         .get_survey             = mwl8k_get_survey,
5420         .ampdu_action           = mwl8k_ampdu_action,
5421 };
5422
5423 static void mwl8k_finalize_join_worker(struct work_struct *work)
5424 {
5425         struct mwl8k_priv *priv =
5426                 container_of(work, struct mwl8k_priv, finalize_join_worker);
5427         struct sk_buff *skb = priv->beacon_skb;
5428         struct ieee80211_mgmt *mgmt = (void *)skb->data;
5429         int len = skb->len - offsetof(struct ieee80211_mgmt, u.beacon.variable);
5430         const u8 *tim = cfg80211_find_ie(WLAN_EID_TIM,
5431                                          mgmt->u.beacon.variable, len);
5432         int dtim_period = 1;
5433
5434         if (tim && tim[1] >= 2)
5435                 dtim_period = tim[3];
5436
5437         mwl8k_cmd_finalize_join(priv->hw, skb->data, skb->len, dtim_period);
5438
5439         dev_kfree_skb(skb);
5440         priv->beacon_skb = NULL;
5441 }
5442
5443 enum {
5444         MWL8363 = 0,
5445         MWL8687,
5446         MWL8366,
5447         MWL8764,
5448 };
5449
5450 #define MWL8K_8366_AP_FW_API 3
5451 #define _MWL8K_8366_AP_FW(api) "mwl8k/fmimage_8366_ap-" #api ".fw"
5452 #define MWL8K_8366_AP_FW(api) _MWL8K_8366_AP_FW(api)
5453
5454 #define MWL8K_8764_AP_FW_API 1
5455 #define _MWL8K_8764_AP_FW(api) "mwl8k/fmimage_8764_ap-" #api ".fw"
5456 #define MWL8K_8764_AP_FW(api) _MWL8K_8764_AP_FW(api)
5457
5458 static struct mwl8k_device_info mwl8k_info_tbl[] = {
5459         [MWL8363] = {
5460                 .part_name      = "88w8363",
5461                 .helper_image   = "mwl8k/helper_8363.fw",
5462                 .fw_image_sta   = "mwl8k/fmimage_8363.fw",
5463         },
5464         [MWL8687] = {
5465                 .part_name      = "88w8687",
5466                 .helper_image   = "mwl8k/helper_8687.fw",
5467                 .fw_image_sta   = "mwl8k/fmimage_8687.fw",
5468         },
5469         [MWL8366] = {
5470                 .part_name      = "88w8366",
5471                 .helper_image   = "mwl8k/helper_8366.fw",
5472                 .fw_image_sta   = "mwl8k/fmimage_8366.fw",
5473                 .fw_image_ap    = MWL8K_8366_AP_FW(MWL8K_8366_AP_FW_API),
5474                 .fw_api_ap      = MWL8K_8366_AP_FW_API,
5475                 .ap_rxd_ops     = &rxd_ap_ops,
5476         },
5477         [MWL8764] = {
5478                 .part_name      = "88w8764",
5479                 .fw_image_ap    = MWL8K_8764_AP_FW(MWL8K_8764_AP_FW_API),
5480                 .fw_api_ap      = MWL8K_8764_AP_FW_API,
5481                 .ap_rxd_ops     = &rxd_ap_ops,
5482         },
5483 };
5484
5485 MODULE_FIRMWARE("mwl8k/helper_8363.fw");
5486 MODULE_FIRMWARE("mwl8k/fmimage_8363.fw");
5487 MODULE_FIRMWARE("mwl8k/helper_8687.fw");
5488 MODULE_FIRMWARE("mwl8k/fmimage_8687.fw");
5489 MODULE_FIRMWARE("mwl8k/helper_8366.fw");
5490 MODULE_FIRMWARE("mwl8k/fmimage_8366.fw");
5491 MODULE_FIRMWARE(MWL8K_8366_AP_FW(MWL8K_8366_AP_FW_API));
5492
5493 static DEFINE_PCI_DEVICE_TABLE(mwl8k_pci_id_table) = {
5494         { PCI_VDEVICE(MARVELL, 0x2a0a), .driver_data = MWL8363, },
5495         { PCI_VDEVICE(MARVELL, 0x2a0c), .driver_data = MWL8363, },
5496         { PCI_VDEVICE(MARVELL, 0x2a24), .driver_data = MWL8363, },
5497         { PCI_VDEVICE(MARVELL, 0x2a2b), .driver_data = MWL8687, },
5498         { PCI_VDEVICE(MARVELL, 0x2a30), .driver_data = MWL8687, },
5499         { PCI_VDEVICE(MARVELL, 0x2a40), .driver_data = MWL8366, },
5500         { PCI_VDEVICE(MARVELL, 0x2a41), .driver_data = MWL8366, },
5501         { PCI_VDEVICE(MARVELL, 0x2a42), .driver_data = MWL8366, },
5502         { PCI_VDEVICE(MARVELL, 0x2a43), .driver_data = MWL8366, },
5503         { PCI_VDEVICE(MARVELL, 0x2b36), .driver_data = MWL8764, },
5504         { },
5505 };
5506 MODULE_DEVICE_TABLE(pci, mwl8k_pci_id_table);
5507
5508 static int mwl8k_request_alt_fw(struct mwl8k_priv *priv)
5509 {
5510         int rc;
5511         printk(KERN_ERR "%s: Error requesting preferred fw %s.\n"
5512                "Trying alternative firmware %s\n", pci_name(priv->pdev),
5513                priv->fw_pref, priv->fw_alt);
5514         rc = mwl8k_request_fw(priv, priv->fw_alt, &priv->fw_ucode, true);
5515         if (rc) {
5516                 printk(KERN_ERR "%s: Error requesting alt fw %s\n",
5517                        pci_name(priv->pdev), priv->fw_alt);
5518                 return rc;
5519         }
5520         return 0;
5521 }
5522
5523 static int mwl8k_firmware_load_success(struct mwl8k_priv *priv);
5524 static void mwl8k_fw_state_machine(const struct firmware *fw, void *context)
5525 {
5526         struct mwl8k_priv *priv = context;
5527         struct mwl8k_device_info *di = priv->device_info;
5528         int rc;
5529
5530         switch (priv->fw_state) {
5531         case FW_STATE_INIT:
5532                 if (!fw) {
5533                         printk(KERN_ERR "%s: Error requesting helper fw %s\n",
5534                                pci_name(priv->pdev), di->helper_image);
5535                         goto fail;
5536                 }
5537                 priv->fw_helper = fw;
5538                 rc = mwl8k_request_fw(priv, priv->fw_pref, &priv->fw_ucode,
5539                                       true);
5540                 if (rc && priv->fw_alt) {
5541                         rc = mwl8k_request_alt_fw(priv);
5542                         if (rc)
5543                                 goto fail;
5544                         priv->fw_state = FW_STATE_LOADING_ALT;
5545                 } else if (rc)
5546                         goto fail;
5547                 else
5548                         priv->fw_state = FW_STATE_LOADING_PREF;
5549                 break;
5550
5551         case FW_STATE_LOADING_PREF:
5552                 if (!fw) {
5553                         if (priv->fw_alt) {
5554                                 rc = mwl8k_request_alt_fw(priv);
5555                                 if (rc)
5556                                         goto fail;
5557                                 priv->fw_state = FW_STATE_LOADING_ALT;
5558                         } else
5559                                 goto fail;
5560                 } else {
5561                         priv->fw_ucode = fw;
5562                         rc = mwl8k_firmware_load_success(priv);
5563                         if (rc)
5564                                 goto fail;
5565                         else
5566                                 complete(&priv->firmware_loading_complete);
5567                 }
5568                 break;
5569
5570         case FW_STATE_LOADING_ALT:
5571                 if (!fw) {
5572                         printk(KERN_ERR "%s: Error requesting alt fw %s\n",
5573                                pci_name(priv->pdev), di->helper_image);
5574                         goto fail;
5575                 }
5576                 priv->fw_ucode = fw;
5577                 rc = mwl8k_firmware_load_success(priv);
5578                 if (rc)
5579                         goto fail;
5580                 else
5581                         complete(&priv->firmware_loading_complete);
5582                 break;
5583
5584         default:
5585                 printk(KERN_ERR "%s: Unexpected firmware loading state: %d\n",
5586                        MWL8K_NAME, priv->fw_state);
5587                 BUG_ON(1);
5588         }
5589
5590         return;
5591
5592 fail:
5593         priv->fw_state = FW_STATE_ERROR;
5594         complete(&priv->firmware_loading_complete);
5595         device_release_driver(&priv->pdev->dev);
5596         mwl8k_release_firmware(priv);
5597 }
5598
5599 #define MAX_RESTART_ATTEMPTS 1
5600 static int mwl8k_init_firmware(struct ieee80211_hw *hw, char *fw_image,
5601                                bool nowait)
5602 {
5603         struct mwl8k_priv *priv = hw->priv;
5604         int rc;
5605         int count = MAX_RESTART_ATTEMPTS;
5606
5607 retry:
5608         /* Reset firmware and hardware */
5609         mwl8k_hw_reset(priv);
5610
5611         /* Ask userland hotplug daemon for the device firmware */
5612         rc = mwl8k_request_firmware(priv, fw_image, nowait);
5613         if (rc) {
5614                 wiphy_err(hw->wiphy, "Firmware files not found\n");
5615                 return rc;
5616         }
5617
5618         if (nowait)
5619                 return rc;
5620
5621         /* Load firmware into hardware */
5622         rc = mwl8k_load_firmware(hw);
5623         if (rc)
5624                 wiphy_err(hw->wiphy, "Cannot start firmware\n");
5625
5626         /* Reclaim memory once firmware is successfully loaded */
5627         mwl8k_release_firmware(priv);
5628
5629         if (rc && count) {
5630                 /* FW did not start successfully;
5631                  * lets try one more time
5632                  */
5633                 count--;
5634                 wiphy_err(hw->wiphy, "Trying to reload the firmware again\n");
5635                 msleep(20);
5636                 goto retry;
5637         }
5638
5639         return rc;
5640 }
5641
5642 static int mwl8k_init_txqs(struct ieee80211_hw *hw)
5643 {
5644         struct mwl8k_priv *priv = hw->priv;
5645         int rc = 0;
5646         int i;
5647
5648         for (i = 0; i < mwl8k_tx_queues(priv); i++) {
5649                 rc = mwl8k_txq_init(hw, i);
5650                 if (rc)
5651                         break;
5652                 if (priv->ap_fw)
5653                         iowrite32(priv->txq[i].txd_dma,
5654                                   priv->sram + priv->txq_offset[i]);
5655         }
5656         return rc;
5657 }
5658
5659 /* initialize hw after successfully loading a firmware image */
5660 static int mwl8k_probe_hw(struct ieee80211_hw *hw)
5661 {
5662         struct mwl8k_priv *priv = hw->priv;
5663         int rc = 0;
5664         int i;
5665
5666         if (priv->ap_fw) {
5667                 priv->rxd_ops = priv->device_info->ap_rxd_ops;
5668                 if (priv->rxd_ops == NULL) {
5669                         wiphy_err(hw->wiphy,
5670                                   "Driver does not have AP firmware image support for this hardware\n");
5671                         rc = -ENOENT;
5672                         goto err_stop_firmware;
5673                 }
5674         } else {
5675                 priv->rxd_ops = &rxd_sta_ops;
5676         }
5677
5678         priv->sniffer_enabled = false;
5679         priv->wmm_enabled = false;
5680         priv->pending_tx_pkts = 0;
5681         atomic_set(&priv->watchdog_event_pending, 0);
5682
5683         rc = mwl8k_rxq_init(hw, 0);
5684         if (rc)
5685                 goto err_stop_firmware;
5686         rxq_refill(hw, 0, INT_MAX);
5687
5688         /* For the sta firmware, we need to know the dma addresses of tx queues
5689          * before sending MWL8K_CMD_GET_HW_SPEC.  So we must initialize them
5690          * prior to issuing this command.  But for the AP case, we learn the
5691          * total number of queues from the result CMD_GET_HW_SPEC, so for this
5692          * case we must initialize the tx queues after.
5693          */
5694         priv->num_ampdu_queues = 0;
5695         if (!priv->ap_fw) {
5696                 rc = mwl8k_init_txqs(hw);
5697                 if (rc)
5698                         goto err_free_queues;
5699         }
5700
5701         iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
5702         iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5703         iowrite32(MWL8K_A2H_INT_TX_DONE|MWL8K_A2H_INT_RX_READY|
5704                   MWL8K_A2H_INT_BA_WATCHDOG,
5705                   priv->regs + MWL8K_HIU_A2H_INTERRUPT_CLEAR_SEL);
5706         iowrite32(MWL8K_A2H_INT_OPC_DONE,
5707                   priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
5708
5709         rc = request_irq(priv->pdev->irq, mwl8k_interrupt,
5710                          IRQF_SHARED, MWL8K_NAME, hw);
5711         if (rc) {
5712                 wiphy_err(hw->wiphy, "failed to register IRQ handler\n");
5713                 goto err_free_queues;
5714         }
5715
5716         /*
5717          * When hw restart is requested,
5718          * mac80211 will take care of clearing
5719          * the ampdu streams, so do not clear
5720          * the ampdu state here
5721          */
5722         if (!priv->hw_restart_in_progress)
5723                 memset(priv->ampdu, 0, sizeof(priv->ampdu));
5724
5725         /*
5726          * Temporarily enable interrupts.  Initial firmware host
5727          * commands use interrupts and avoid polling.  Disable
5728          * interrupts when done.
5729          */
5730         iowrite32(MWL8K_A2H_EVENTS, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5731
5732         /* Get config data, mac addrs etc */
5733         if (priv->ap_fw) {
5734                 rc = mwl8k_cmd_get_hw_spec_ap(hw);
5735                 if (!rc)
5736                         rc = mwl8k_init_txqs(hw);
5737                 if (!rc)
5738                         rc = mwl8k_cmd_set_hw_spec(hw);
5739         } else {
5740                 rc = mwl8k_cmd_get_hw_spec_sta(hw);
5741         }
5742         if (rc) {
5743                 wiphy_err(hw->wiphy, "Cannot initialise firmware\n");
5744                 goto err_free_irq;
5745         }
5746
5747         /* Turn radio off */
5748         rc = mwl8k_cmd_radio_disable(hw);
5749         if (rc) {
5750                 wiphy_err(hw->wiphy, "Cannot disable\n");
5751                 goto err_free_irq;
5752         }
5753
5754         /* Clear MAC address */
5755         rc = mwl8k_cmd_set_mac_addr(hw, NULL, "\x00\x00\x00\x00\x00\x00");
5756         if (rc) {
5757                 wiphy_err(hw->wiphy, "Cannot clear MAC address\n");
5758                 goto err_free_irq;
5759         }
5760
5761         /* Configure Antennas */
5762         rc = mwl8k_cmd_rf_antenna(hw, MWL8K_RF_ANTENNA_RX, 0x3);
5763         if (rc)
5764                 wiphy_warn(hw->wiphy, "failed to set # of RX antennas");
5765         rc = mwl8k_cmd_rf_antenna(hw, MWL8K_RF_ANTENNA_TX, 0x7);
5766         if (rc)
5767                 wiphy_warn(hw->wiphy, "failed to set # of TX antennas");
5768
5769
5770         /* Disable interrupts */
5771         iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5772         free_irq(priv->pdev->irq, hw);
5773
5774         wiphy_info(hw->wiphy, "%s v%d, %pm, %s firmware %u.%u.%u.%u\n",
5775                    priv->device_info->part_name,
5776                    priv->hw_rev, hw->wiphy->perm_addr,
5777                    priv->ap_fw ? "AP" : "STA",
5778                    (priv->fw_rev >> 24) & 0xff, (priv->fw_rev >> 16) & 0xff,
5779                    (priv->fw_rev >> 8) & 0xff, priv->fw_rev & 0xff);
5780
5781         return 0;
5782
5783 err_free_irq:
5784         iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5785         free_irq(priv->pdev->irq, hw);
5786
5787 err_free_queues:
5788         for (i = 0; i < mwl8k_tx_queues(priv); i++)
5789                 mwl8k_txq_deinit(hw, i);
5790         mwl8k_rxq_deinit(hw, 0);
5791
5792 err_stop_firmware:
5793         mwl8k_hw_reset(priv);
5794
5795         return rc;
5796 }
5797
5798 /*
5799  * invoke mwl8k_reload_firmware to change the firmware image after the device
5800  * has already been registered
5801  */
5802 static int mwl8k_reload_firmware(struct ieee80211_hw *hw, char *fw_image)
5803 {
5804         int i, rc = 0;
5805         struct mwl8k_priv *priv = hw->priv;
5806         struct mwl8k_vif *vif, *tmp_vif;
5807
5808         mwl8k_stop(hw);
5809         mwl8k_rxq_deinit(hw, 0);
5810
5811         /*
5812          * All the existing interfaces are re-added by the ieee80211_reconfig;
5813          * which means driver should remove existing interfaces before calling
5814          * ieee80211_restart_hw
5815          */
5816         if (priv->hw_restart_in_progress)
5817                 list_for_each_entry_safe(vif, tmp_vif, &priv->vif_list, list)
5818                         mwl8k_remove_vif(priv, vif);
5819
5820         for (i = 0; i < mwl8k_tx_queues(priv); i++)
5821                 mwl8k_txq_deinit(hw, i);
5822
5823         rc = mwl8k_init_firmware(hw, fw_image, false);
5824         if (rc)
5825                 goto fail;
5826
5827         rc = mwl8k_probe_hw(hw);
5828         if (rc)
5829                 goto fail;
5830
5831         if (priv->hw_restart_in_progress)
5832                 return rc;
5833
5834         rc = mwl8k_start(hw);
5835         if (rc)
5836                 goto fail;
5837
5838         rc = mwl8k_config(hw, ~0);
5839         if (rc)
5840                 goto fail;
5841
5842         for (i = 0; i < MWL8K_TX_WMM_QUEUES; i++) {
5843                 rc = mwl8k_conf_tx(hw, NULL, i, &priv->wmm_params[i]);
5844                 if (rc)
5845                         goto fail;
5846         }
5847
5848         return rc;
5849
5850 fail:
5851         printk(KERN_WARNING "mwl8k: Failed to reload firmware image.\n");
5852         return rc;
5853 }
5854
5855 static const struct ieee80211_iface_limit ap_if_limits[] = {
5856         { .max = 8,     .types = BIT(NL80211_IFTYPE_AP) },
5857         { .max = 1,     .types = BIT(NL80211_IFTYPE_STATION) },
5858 };
5859
5860 static const struct ieee80211_iface_combination ap_if_comb = {
5861         .limits = ap_if_limits,
5862         .n_limits = ARRAY_SIZE(ap_if_limits),
5863         .max_interfaces = 8,
5864         .num_different_channels = 1,
5865 };
5866
5867
5868 static int mwl8k_firmware_load_success(struct mwl8k_priv *priv)
5869 {
5870         struct ieee80211_hw *hw = priv->hw;
5871         int i, rc;
5872
5873         rc = mwl8k_load_firmware(hw);
5874         mwl8k_release_firmware(priv);
5875         if (rc) {
5876                 wiphy_err(hw->wiphy, "Cannot start firmware\n");
5877                 return rc;
5878         }
5879
5880         /*
5881          * Extra headroom is the size of the required DMA header
5882          * minus the size of the smallest 802.11 frame (CTS frame).
5883          */
5884         hw->extra_tx_headroom =
5885                 sizeof(struct mwl8k_dma_data) - sizeof(struct ieee80211_cts);
5886
5887         hw->extra_tx_headroom -= priv->ap_fw ? REDUCED_TX_HEADROOM : 0;
5888
5889         hw->channel_change_time = 10;
5890
5891         hw->queues = MWL8K_TX_WMM_QUEUES;
5892
5893         /* Set rssi values to dBm */
5894         hw->flags |= IEEE80211_HW_SIGNAL_DBM | IEEE80211_HW_HAS_RATE_CONTROL;
5895
5896         /*
5897          * Ask mac80211 to not to trigger PS mode
5898          * based on PM bit of incoming frames.
5899          */
5900         if (priv->ap_fw)
5901                 hw->flags |= IEEE80211_HW_AP_LINK_PS;
5902
5903         hw->vif_data_size = sizeof(struct mwl8k_vif);
5904         hw->sta_data_size = sizeof(struct mwl8k_sta);
5905
5906         priv->macids_used = 0;
5907         INIT_LIST_HEAD(&priv->vif_list);
5908
5909         /* Set default radio state and preamble */
5910         priv->radio_on = false;
5911         priv->radio_short_preamble = false;
5912
5913         /* Finalize join worker */
5914         INIT_WORK(&priv->finalize_join_worker, mwl8k_finalize_join_worker);
5915         /* Handle watchdog ba events */
5916         INIT_WORK(&priv->watchdog_ba_handle, mwl8k_watchdog_ba_events);
5917         /* To reload the firmware if it crashes */
5918         INIT_WORK(&priv->fw_reload, mwl8k_hw_restart_work);
5919
5920         /* TX reclaim and RX tasklets.  */
5921         tasklet_init(&priv->poll_tx_task, mwl8k_tx_poll, (unsigned long)hw);
5922         tasklet_disable(&priv->poll_tx_task);
5923         tasklet_init(&priv->poll_rx_task, mwl8k_rx_poll, (unsigned long)hw);
5924         tasklet_disable(&priv->poll_rx_task);
5925
5926         /* Power management cookie */
5927         priv->cookie = pci_alloc_consistent(priv->pdev, 4, &priv->cookie_dma);
5928         if (priv->cookie == NULL)
5929                 return -ENOMEM;
5930
5931         mutex_init(&priv->fw_mutex);
5932         priv->fw_mutex_owner = NULL;
5933         priv->fw_mutex_depth = 0;
5934         priv->hostcmd_wait = NULL;
5935
5936         spin_lock_init(&priv->tx_lock);
5937
5938         spin_lock_init(&priv->stream_lock);
5939
5940         priv->tx_wait = NULL;
5941
5942         rc = mwl8k_probe_hw(hw);
5943         if (rc)
5944                 goto err_free_cookie;
5945
5946         hw->wiphy->interface_modes = 0;
5947
5948         if (priv->ap_macids_supported || priv->device_info->fw_image_ap) {
5949                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP);
5950                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_STATION);
5951                 hw->wiphy->iface_combinations = &ap_if_comb;
5952                 hw->wiphy->n_iface_combinations = 1;
5953         }
5954
5955         if (priv->sta_macids_supported || priv->device_info->fw_image_sta)
5956                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_STATION);
5957
5958         rc = ieee80211_register_hw(hw);
5959         if (rc) {
5960                 wiphy_err(hw->wiphy, "Cannot register device\n");
5961                 goto err_unprobe_hw;
5962         }
5963
5964         return 0;
5965
5966 err_unprobe_hw:
5967         for (i = 0; i < mwl8k_tx_queues(priv); i++)
5968                 mwl8k_txq_deinit(hw, i);
5969         mwl8k_rxq_deinit(hw, 0);
5970
5971 err_free_cookie:
5972         if (priv->cookie != NULL)
5973                 pci_free_consistent(priv->pdev, 4,
5974                                 priv->cookie, priv->cookie_dma);
5975
5976         return rc;
5977 }
5978 static int mwl8k_probe(struct pci_dev *pdev,
5979                                  const struct pci_device_id *id)
5980 {
5981         static int printed_version;
5982         struct ieee80211_hw *hw;
5983         struct mwl8k_priv *priv;
5984         struct mwl8k_device_info *di;
5985         int rc;
5986
5987         if (!printed_version) {
5988                 printk(KERN_INFO "%s version %s\n", MWL8K_DESC, MWL8K_VERSION);
5989                 printed_version = 1;
5990         }
5991
5992
5993         rc = pci_enable_device(pdev);
5994         if (rc) {
5995                 printk(KERN_ERR "%s: Cannot enable new PCI device\n",
5996                        MWL8K_NAME);
5997                 return rc;
5998         }
5999
6000         rc = pci_request_regions(pdev, MWL8K_NAME);
6001         if (rc) {
6002                 printk(KERN_ERR "%s: Cannot obtain PCI resources\n",
6003                        MWL8K_NAME);
6004                 goto err_disable_device;
6005         }
6006
6007         pci_set_master(pdev);
6008
6009
6010         hw = ieee80211_alloc_hw(sizeof(*priv), &mwl8k_ops);
6011         if (hw == NULL) {
6012                 printk(KERN_ERR "%s: ieee80211 alloc failed\n", MWL8K_NAME);
6013                 rc = -ENOMEM;
6014                 goto err_free_reg;
6015         }
6016
6017         SET_IEEE80211_DEV(hw, &pdev->dev);
6018         pci_set_drvdata(pdev, hw);
6019
6020         priv = hw->priv;
6021         priv->hw = hw;
6022         priv->pdev = pdev;
6023         priv->device_info = &mwl8k_info_tbl[id->driver_data];
6024
6025         if (id->driver_data == MWL8764)
6026                 priv->is_8764 = true;
6027
6028         priv->sram = pci_iomap(pdev, 0, 0x10000);
6029         if (priv->sram == NULL) {
6030                 wiphy_err(hw->wiphy, "Cannot map device SRAM\n");
6031                 rc = -EIO;
6032                 goto err_iounmap;
6033         }
6034
6035         /*
6036          * If BAR0 is a 32 bit BAR, the register BAR will be BAR1.
6037          * If BAR0 is a 64 bit BAR, the register BAR will be BAR2.
6038          */
6039         priv->regs = pci_iomap(pdev, 1, 0x10000);
6040         if (priv->regs == NULL) {
6041                 priv->regs = pci_iomap(pdev, 2, 0x10000);
6042                 if (priv->regs == NULL) {
6043                         wiphy_err(hw->wiphy, "Cannot map device registers\n");
6044                         rc = -EIO;
6045                         goto err_iounmap;
6046                 }
6047         }
6048
6049         /*
6050          * Choose the initial fw image depending on user input.  If a second
6051          * image is available, make it the alternative image that will be
6052          * loaded if the first one fails.
6053          */
6054         init_completion(&priv->firmware_loading_complete);
6055         di = priv->device_info;
6056         if (ap_mode_default && di->fw_image_ap) {
6057                 priv->fw_pref = di->fw_image_ap;
6058                 priv->fw_alt = di->fw_image_sta;
6059         } else if (!ap_mode_default && di->fw_image_sta) {
6060                 priv->fw_pref = di->fw_image_sta;
6061                 priv->fw_alt = di->fw_image_ap;
6062         } else if (ap_mode_default && !di->fw_image_ap && di->fw_image_sta) {
6063                 printk(KERN_WARNING "AP fw is unavailable.  Using STA fw.");
6064                 priv->fw_pref = di->fw_image_sta;
6065         } else if (!ap_mode_default && !di->fw_image_sta && di->fw_image_ap) {
6066                 printk(KERN_WARNING "STA fw is unavailable.  Using AP fw.");
6067                 priv->fw_pref = di->fw_image_ap;
6068         }
6069         rc = mwl8k_init_firmware(hw, priv->fw_pref, true);
6070         if (rc)
6071                 goto err_stop_firmware;
6072
6073         priv->hw_restart_in_progress = false;
6074
6075         priv->running_bsses = 0;
6076
6077         return rc;
6078
6079 err_stop_firmware:
6080         mwl8k_hw_reset(priv);
6081
6082 err_iounmap:
6083         if (priv->regs != NULL)
6084                 pci_iounmap(pdev, priv->regs);
6085
6086         if (priv->sram != NULL)
6087                 pci_iounmap(pdev, priv->sram);
6088
6089         pci_set_drvdata(pdev, NULL);
6090         ieee80211_free_hw(hw);
6091
6092 err_free_reg:
6093         pci_release_regions(pdev);
6094
6095 err_disable_device:
6096         pci_disable_device(pdev);
6097
6098         return rc;
6099 }
6100
6101 static void mwl8k_remove(struct pci_dev *pdev)
6102 {
6103         struct ieee80211_hw *hw = pci_get_drvdata(pdev);
6104         struct mwl8k_priv *priv;
6105         int i;
6106
6107         if (hw == NULL)
6108                 return;
6109         priv = hw->priv;
6110
6111         wait_for_completion(&priv->firmware_loading_complete);
6112
6113         if (priv->fw_state == FW_STATE_ERROR) {
6114                 mwl8k_hw_reset(priv);
6115                 goto unmap;
6116         }
6117
6118         ieee80211_stop_queues(hw);
6119
6120         ieee80211_unregister_hw(hw);
6121
6122         /* Remove TX reclaim and RX tasklets.  */
6123         tasklet_kill(&priv->poll_tx_task);
6124         tasklet_kill(&priv->poll_rx_task);
6125
6126         /* Stop hardware */
6127         mwl8k_hw_reset(priv);
6128
6129         /* Return all skbs to mac80211 */
6130         for (i = 0; i < mwl8k_tx_queues(priv); i++)
6131                 mwl8k_txq_reclaim(hw, i, INT_MAX, 1);
6132
6133         for (i = 0; i < mwl8k_tx_queues(priv); i++)
6134                 mwl8k_txq_deinit(hw, i);
6135
6136         mwl8k_rxq_deinit(hw, 0);
6137
6138         pci_free_consistent(priv->pdev, 4, priv->cookie, priv->cookie_dma);
6139
6140 unmap:
6141         pci_iounmap(pdev, priv->regs);
6142         pci_iounmap(pdev, priv->sram);
6143         pci_set_drvdata(pdev, NULL);
6144         ieee80211_free_hw(hw);
6145         pci_release_regions(pdev);
6146         pci_disable_device(pdev);
6147 }
6148
6149 static struct pci_driver mwl8k_driver = {
6150         .name           = MWL8K_NAME,
6151         .id_table       = mwl8k_pci_id_table,
6152         .probe          = mwl8k_probe,
6153         .remove         = mwl8k_remove,
6154 };
6155
6156 module_pci_driver(mwl8k_driver);
6157
6158 MODULE_DESCRIPTION(MWL8K_DESC);
6159 MODULE_VERSION(MWL8K_VERSION);
6160 MODULE_AUTHOR("Lennert Buytenhek <buytenh@marvell.com>");
6161 MODULE_LICENSE("GPL");