drivers/net/wireless/mwl8k.c

   1 /*
   2  * drivers/net/wireless/mwl8k.c
   3  * Driver for Marvell TOPDOG 802.11 Wireless cards
   4  *
   5  * Copyright (C) 2008, 2009, 2010 Marvell Semiconductor Inc.
   6  *
   7  * This file is licensed under the terms of the GNU General Public
   8  * License version 2.  This program is licensed "as is" without any
   9  * warranty of any kind, whether express or implied.
  10  */
  11
  12 #include <linux/interrupt.h>
  13 #include <linux/module.h>
  14 #include <linux/kernel.h>
  15 #include <linux/sched.h>
  16 #include <linux/spinlock.h>
  17 #include <linux/list.h>
  18 #include <linux/pci.h>
  19 #include <linux/delay.h>
  20 #include <linux/completion.h>
  21 #include <linux/etherdevice.h>
  22 #include <linux/slab.h>
  23 #include <net/mac80211.h>
  24 #include <linux/moduleparam.h>
  25 #include <linux/firmware.h>
  26 #include <linux/workqueue.h>
  27
  28 #define MWL8K_DESC      "Marvell TOPDOG(R) 802.11 Wireless Network Driver"
  29 #define MWL8K_NAME      KBUILD_MODNAME
  30 #define MWL8K_VERSION   "0.13"
  31
  32 /* Module parameters */
  33 static bool ap_mode_default;
  34 module_param(ap_mode_default, bool, 0);
  35 MODULE_PARM_DESC(ap_mode_default,
  36                  "Set to 1 to make ap mode the default instead of sta mode");
  37
  38 /* Register definitions */
  39 #define MWL8K_HIU_GEN_PTR                       0x00000c10
  40 #define  MWL8K_MODE_STA                          0x0000005a
  41 #define  MWL8K_MODE_AP                           0x000000a5
  42 #define MWL8K_HIU_INT_CODE                      0x00000c14
  43 #define  MWL8K_FWSTA_READY                       0xf0f1f2f4
  44 #define  MWL8K_FWAP_READY                        0xf1f2f4a5
  45 #define  MWL8K_INT_CODE_CMD_FINISHED             0x00000005
  46 #define MWL8K_HIU_SCRATCH                       0x00000c40
  47
  48 /* Host->device communications */
  49 #define MWL8K_HIU_H2A_INTERRUPT_EVENTS          0x00000c18
  50 #define MWL8K_HIU_H2A_INTERRUPT_STATUS          0x00000c1c
  51 #define MWL8K_HIU_H2A_INTERRUPT_MASK            0x00000c20
  52 #define MWL8K_HIU_H2A_INTERRUPT_CLEAR_SEL       0x00000c24
  53 #define MWL8K_HIU_H2A_INTERRUPT_STATUS_MASK     0x00000c28
  54 #define  MWL8K_H2A_INT_DUMMY                     (1 << 20)
  55 #define  MWL8K_H2A_INT_RESET                     (1 << 15)
  56 #define  MWL8K_H2A_INT_DOORBELL                  (1 << 1)
  57 #define  MWL8K_H2A_INT_PPA_READY                 (1 << 0)
  58
  59 /* Device->host communications */
  60 #define MWL8K_HIU_A2H_INTERRUPT_EVENTS          0x00000c2c
  61 #define MWL8K_HIU_A2H_INTERRUPT_STATUS          0x00000c30
  62 #define MWL8K_HIU_A2H_INTERRUPT_MASK            0x00000c34
  63 #define MWL8K_HIU_A2H_INTERRUPT_CLEAR_SEL       0x00000c38
  64 #define MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK     0x00000c3c
  65 #define  MWL8K_A2H_INT_DUMMY                     (1 << 20)
  66 #define  MWL8K_A2H_INT_BA_WATCHDOG               (1 << 14)
  67 #define  MWL8K_A2H_INT_CHNL_SWITCHED             (1 << 11)
  68 #define  MWL8K_A2H_INT_QUEUE_EMPTY               (1 << 10)
  69 #define  MWL8K_A2H_INT_RADAR_DETECT              (1 << 7)
  70 #define  MWL8K_A2H_INT_RADIO_ON                  (1 << 6)
  71 #define  MWL8K_A2H_INT_RADIO_OFF                 (1 << 5)
  72 #define  MWL8K_A2H_INT_MAC_EVENT                 (1 << 3)
  73 #define  MWL8K_A2H_INT_OPC_DONE                  (1 << 2)
  74 #define  MWL8K_A2H_INT_RX_READY                  (1 << 1)
  75 #define  MWL8K_A2H_INT_TX_DONE                   (1 << 0)
  76
  77 /* HW micro second timer register
  78  * located at offset 0xA600. This
  79  * will be used to timestamp tx
  80  * packets.
  81  */
  82
  83 #define MWL8K_HW_TIMER_REGISTER                 0x0000a600
  84 #define BBU_RXRDY_CNT_REG                       0x0000a860
  85 #define NOK_CCA_CNT_REG                         0x0000a6a0
  86 #define BBU_AVG_NOISE_VAL                       0x67
  87
  88 #define MWL8K_A2H_EVENTS        (MWL8K_A2H_INT_DUMMY | \
  89                                  MWL8K_A2H_INT_CHNL_SWITCHED | \
  90                                  MWL8K_A2H_INT_QUEUE_EMPTY | \
  91                                  MWL8K_A2H_INT_RADAR_DETECT | \
  92                                  MWL8K_A2H_INT_RADIO_ON | \
  93                                  MWL8K_A2H_INT_RADIO_OFF | \
  94                                  MWL8K_A2H_INT_MAC_EVENT | \
  95                                  MWL8K_A2H_INT_OPC_DONE | \
  96                                  MWL8K_A2H_INT_RX_READY | \
  97                                  MWL8K_A2H_INT_TX_DONE | \
  98                                  MWL8K_A2H_INT_BA_WATCHDOG)
  99
 100 #define MWL8K_RX_QUEUES         1
 101 #define MWL8K_TX_WMM_QUEUES     4
 102 #define MWL8K_MAX_AMPDU_QUEUES  8
 103 #define MWL8K_MAX_TX_QUEUES     (MWL8K_TX_WMM_QUEUES + MWL8K_MAX_AMPDU_QUEUES)
 104 #define mwl8k_tx_queues(priv)   (MWL8K_TX_WMM_QUEUES + (priv)->num_ampdu_queues)
 105
 106 /* txpriorities are mapped with hw queues.
 107  * Each hw queue has a txpriority.
 108  */
 109 #define TOTAL_HW_TX_QUEUES      8
 110
 111 /* Each HW queue can have one AMPDU stream.
 112  * But, because one of the hw queue is reserved,
 113  * maximum AMPDU queues that can be created are
 114  * one short of total tx queues.
 115  */
 116 #define MWL8K_NUM_AMPDU_STREAMS (TOTAL_HW_TX_QUEUES - 1)
 117
 118 #define MWL8K_NUM_CHANS 18
 119
 120 struct rxd_ops {
 121         int rxd_size;
 122         void (*rxd_init)(void *rxd, dma_addr_t next_dma_addr);
 123         void (*rxd_refill)(void *rxd, dma_addr_t addr, int len);
 124         int (*rxd_process)(void *rxd, struct ieee80211_rx_status *status,
 125                            __le16 *qos, s8 *noise);
 126 };
 127
 128 struct mwl8k_device_info {
 129         char *part_name;
 130         char *helper_image;
 131         char *fw_image_sta;
 132         char *fw_image_ap;
 133         struct rxd_ops *ap_rxd_ops;
 134         u32 fw_api_ap;
 135 };
 136
 137 struct mwl8k_rx_queue {
 138         int rxd_count;
 139
 140         /* hw receives here */
 141         int head;
 142
 143         /* refill descs here */
 144         int tail;
 145
 146         void *rxd;
 147         dma_addr_t rxd_dma;
 148         struct {
 149                 struct sk_buff *skb;
 150                 DEFINE_DMA_UNMAP_ADDR(dma);
 151         } *buf;
 152 };
 153
 154 struct mwl8k_tx_queue {
 155         /* hw transmits here */
 156         int head;
 157
 158         /* sw appends here */
 159         int tail;
 160
 161         unsigned int len;
 162         struct mwl8k_tx_desc *txd;
 163         dma_addr_t txd_dma;
 164         struct sk_buff **skb;
 165 };
 166
 167 enum {
 168         AMPDU_NO_STREAM,
 169         AMPDU_STREAM_NEW,
 170         AMPDU_STREAM_IN_PROGRESS,
 171         AMPDU_STREAM_ACTIVE,
 172 };
 173
 174 struct mwl8k_ampdu_stream {
 175         struct ieee80211_sta *sta;
 176         u8 tid;
 177         u8 state;
 178         u8 idx;
 179 };
 180
 181 struct mwl8k_priv {
 182         struct ieee80211_hw *hw;
 183         struct pci_dev *pdev;
 184         int irq;
 185
 186         struct mwl8k_device_info *device_info;
 187
 188         void __iomem *sram;
 189         void __iomem *regs;
 190
 191         /* firmware */
 192         const struct firmware *fw_helper;
 193         const struct firmware *fw_ucode;
 194
 195         /* hardware/firmware parameters */
 196         bool ap_fw;
 197         struct rxd_ops *rxd_ops;
 198         struct ieee80211_supported_band band_24;
 199         struct ieee80211_channel channels_24[14];
 200         struct ieee80211_rate rates_24[13];
 201         struct ieee80211_supported_band band_50;
 202         struct ieee80211_channel channels_50[4];
 203         struct ieee80211_rate rates_50[8];
 204         u32 ap_macids_supported;
 205         u32 sta_macids_supported;
 206
 207         /* Ampdu stream information */
 208         u8 num_ampdu_queues;
 209         spinlock_t stream_lock;
 210         struct mwl8k_ampdu_stream ampdu[MWL8K_MAX_AMPDU_QUEUES];
 211         struct work_struct watchdog_ba_handle;
 212
 213         /* firmware access */
 214         struct mutex fw_mutex;
 215         struct task_struct *fw_mutex_owner;
 216         struct task_struct *hw_restart_owner;
 217         int fw_mutex_depth;
 218         struct completion *hostcmd_wait;
 219
 220         atomic_t watchdog_event_pending;
 221
 222         /* lock held over TX and TX reap */
 223         spinlock_t tx_lock;
 224
 225         /* TX quiesce completion, protected by fw_mutex and tx_lock */
 226         struct completion *tx_wait;
 227
 228         /* List of interfaces.  */
 229         u32 macids_used;
 230         struct list_head vif_list;
 231
 232         /* power management status cookie from firmware */
 233         u32 *cookie;
 234         dma_addr_t cookie_dma;
 235
 236         u16 num_mcaddrs;
 237         u8 hw_rev;
 238         u32 fw_rev;
 239         u32 caps;
 240
 241         /*
 242          * Running count of TX packets in flight, to avoid
 243          * iterating over the transmit rings each time.
 244          */
 245         int pending_tx_pkts;
 246
 247         struct mwl8k_rx_queue rxq[MWL8K_RX_QUEUES];
 248         struct mwl8k_tx_queue txq[MWL8K_MAX_TX_QUEUES];
 249         u32 txq_offset[MWL8K_MAX_TX_QUEUES];
 250
 251         bool radio_on;
 252         bool radio_short_preamble;
 253         bool sniffer_enabled;
 254         bool wmm_enabled;
 255
 256         /* XXX need to convert this to handle multiple interfaces */
 257         bool capture_beacon;
 258         u8 capture_bssid[ETH_ALEN];
 259         struct sk_buff *beacon_skb;
 260
 261         /*
 262          * This FJ worker has to be global as it is scheduled from the
 263          * RX handler.  At this point we don't know which interface it
 264          * belongs to until the list of bssids waiting to complete join
 265          * is checked.
 266          */
 267         struct work_struct finalize_join_worker;
 268
 269         /* Tasklet to perform TX reclaim.  */
 270         struct tasklet_struct poll_tx_task;
 271
 272         /* Tasklet to perform RX.  */
 273         struct tasklet_struct poll_rx_task;
 274
 275         /* Most recently reported noise in dBm */
 276         s8 noise;
 277
 278         /*
 279          * preserve the queue configurations so they can be restored if/when
 280          * the firmware image is swapped.
 281          */
 282         struct ieee80211_tx_queue_params wmm_params[MWL8K_TX_WMM_QUEUES];
 283
 284         /* To perform the task of reloading the firmware */
 285         struct work_struct fw_reload;
 286         bool hw_restart_in_progress;
 287
 288         /* async firmware loading state */
 289         unsigned fw_state;
 290         char *fw_pref;
 291         char *fw_alt;
 292         bool is_8764;
 293         struct completion firmware_loading_complete;
 294
 295         /* bitmap of running BSSes */
 296         u32 running_bsses;
 297
 298         /* ACS related */
 299         bool sw_scan_start;
 300         struct ieee80211_channel *acs_chan;
 301         unsigned long channel_time;
 302         struct survey_info survey[MWL8K_NUM_CHANS];
 303 };
 304
 305 #define MAX_WEP_KEY_LEN         13
 306 #define NUM_WEP_KEYS            4
 307
 308 /* Per interface specific private data */
 309 struct mwl8k_vif {
 310         struct list_head list;
 311         struct ieee80211_vif *vif;
 312
 313         /* Firmware macid for this vif.  */
 314         int macid;
 315
 316         /* Non AMPDU sequence number assigned by driver.  */
 317         u16 seqno;
 318
 319         /* Saved WEP keys */
 320         struct {
 321                 u8 enabled;
 322                 u8 key[sizeof(struct ieee80211_key_conf) + MAX_WEP_KEY_LEN];
 323         } wep_key_conf[NUM_WEP_KEYS];
 324
 325         /* BSSID */
 326         u8 bssid[ETH_ALEN];
 327
 328         /* A flag to indicate is HW crypto is enabled for this bssid */
 329         bool is_hw_crypto_enabled;
 330 };
 331 #define MWL8K_VIF(_vif) ((struct mwl8k_vif *)&((_vif)->drv_priv))
 332 #define IEEE80211_KEY_CONF(_u8) ((struct ieee80211_key_conf *)(_u8))
 333
 334 struct tx_traffic_info {
 335         u32 start_time;
 336         u32 pkts;
 337 };
 338
 339 #define MWL8K_MAX_TID 8
 340 struct mwl8k_sta {
 341         /* Index into station database. Returned by UPDATE_STADB.  */
 342         u8 peer_id;
 343         u8 is_ampdu_allowed;
 344         struct tx_traffic_info tx_stats[MWL8K_MAX_TID];
 345 };
 346 #define MWL8K_STA(_sta) ((struct mwl8k_sta *)&((_sta)->drv_priv))
 347
 348 static const struct ieee80211_channel mwl8k_channels_24[] = {
 349         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2412, .hw_value = 1, },
 350         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2417, .hw_value = 2, },
 351         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2422, .hw_value = 3, },
 352         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2427, .hw_value = 4, },
 353         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2432, .hw_value = 5, },
 354         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2437, .hw_value = 6, },
 355         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2442, .hw_value = 7, },
 356         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2447, .hw_value = 8, },
 357         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2452, .hw_value = 9, },
 358         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2457, .hw_value = 10, },
 359         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2462, .hw_value = 11, },
 360         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2467, .hw_value = 12, },
 361         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2472, .hw_value = 13, },
 362         { .band = IEEE80211_BAND_2GHZ, .center_freq = 2484, .hw_value = 14, },
 363 };
 364
 365 static const struct ieee80211_rate mwl8k_rates_24[] = {
 366         { .bitrate = 10, .hw_value = 2, },
 367         { .bitrate = 20, .hw_value = 4, },
 368         { .bitrate = 55, .hw_value = 11, },
 369         { .bitrate = 110, .hw_value = 22, },
 370         { .bitrate = 220, .hw_value = 44, },
 371         { .bitrate = 60, .hw_value = 12, },
 372         { .bitrate = 90, .hw_value = 18, },
 373         { .bitrate = 120, .hw_value = 24, },
 374         { .bitrate = 180, .hw_value = 36, },
 375         { .bitrate = 240, .hw_value = 48, },
 376         { .bitrate = 360, .hw_value = 72, },
 377         { .bitrate = 480, .hw_value = 96, },
 378         { .bitrate = 540, .hw_value = 108, },
 379 };
 380
 381 static const struct ieee80211_channel mwl8k_channels_50[] = {
 382         { .band = IEEE80211_BAND_5GHZ, .center_freq = 5180, .hw_value = 36, },
 383         { .band = IEEE80211_BAND_5GHZ, .center_freq = 5200, .hw_value = 40, },
 384         { .band = IEEE80211_BAND_5GHZ, .center_freq = 5220, .hw_value = 44, },
 385         { .band = IEEE80211_BAND_5GHZ, .center_freq = 5240, .hw_value = 48, },
 386 };
 387
 388 static const struct ieee80211_rate mwl8k_rates_50[] = {
 389         { .bitrate = 60, .hw_value = 12, },
 390         { .bitrate = 90, .hw_value = 18, },
 391         { .bitrate = 120, .hw_value = 24, },
 392         { .bitrate = 180, .hw_value = 36, },
 393         { .bitrate = 240, .hw_value = 48, },
 394         { .bitrate = 360, .hw_value = 72, },
 395         { .bitrate = 480, .hw_value = 96, },
 396         { .bitrate = 540, .hw_value = 108, },
 397 };
 398
 399 /* Set or get info from Firmware */
 400 #define MWL8K_CMD_GET                   0x0000
 401 #define MWL8K_CMD_SET                   0x0001
 402 #define MWL8K_CMD_SET_LIST              0x0002
 403
 404 /* Firmware command codes */
 405 #define MWL8K_CMD_CODE_DNLD             0x0001
 406 #define MWL8K_CMD_GET_HW_SPEC           0x0003
 407 #define MWL8K_CMD_SET_HW_SPEC           0x0004
 408 #define MWL8K_CMD_MAC_MULTICAST_ADR     0x0010
 409 #define MWL8K_CMD_GET_STAT              0x0014
 410 #define MWL8K_CMD_BBP_REG_ACCESS        0x001a
 411 #define MWL8K_CMD_RADIO_CONTROL         0x001c
 412 #define MWL8K_CMD_RF_TX_POWER           0x001e
 413 #define MWL8K_CMD_TX_POWER              0x001f
 414 #define MWL8K_CMD_RF_ANTENNA            0x0020
 415 #define MWL8K_CMD_SET_BEACON            0x0100          /* per-vif */
 416 #define MWL8K_CMD_SET_PRE_SCAN          0x0107
 417 #define MWL8K_CMD_SET_POST_SCAN         0x0108
 418 #define MWL8K_CMD_SET_RF_CHANNEL        0x010a
 419 #define MWL8K_CMD_SET_AID               0x010d
 420 #define MWL8K_CMD_SET_RATE              0x0110
 421 #define MWL8K_CMD_SET_FINALIZE_JOIN     0x0111
 422 #define MWL8K_CMD_RTS_THRESHOLD         0x0113
 423 #define MWL8K_CMD_SET_SLOT              0x0114
 424 #define MWL8K_CMD_SET_EDCA_PARAMS       0x0115
 425 #define MWL8K_CMD_SET_WMM_MODE          0x0123
 426 #define MWL8K_CMD_MIMO_CONFIG           0x0125
 427 #define MWL8K_CMD_USE_FIXED_RATE        0x0126
 428 #define MWL8K_CMD_ENABLE_SNIFFER        0x0150
 429 #define MWL8K_CMD_SET_MAC_ADDR          0x0202          /* per-vif */
 430 #define MWL8K_CMD_SET_RATEADAPT_MODE    0x0203
 431 #define MWL8K_CMD_GET_WATCHDOG_BITMAP   0x0205
 432 #define MWL8K_CMD_DEL_MAC_ADDR          0x0206          /* per-vif */
 433 #define MWL8K_CMD_BSS_START             0x1100          /* per-vif */
 434 #define MWL8K_CMD_SET_NEW_STN           0x1111          /* per-vif */
 435 #define MWL8K_CMD_UPDATE_ENCRYPTION     0x1122          /* per-vif */
 436 #define MWL8K_CMD_UPDATE_STADB          0x1123
 437 #define MWL8K_CMD_BASTREAM              0x1125
 438
 439 static const char *mwl8k_cmd_name(__le16 cmd, char *buf, int bufsize)
 440 {
 441         u16 command = le16_to_cpu(cmd);
 442
 443 #define MWL8K_CMDNAME(x)        case MWL8K_CMD_##x: do {\
 444                                         snprintf(buf, bufsize, "%s", #x);\
 445                                         return buf;\
 446                                         } while (0)
 447         switch (command & ~0x8000) {
 448                 MWL8K_CMDNAME(CODE_DNLD);
 449                 MWL8K_CMDNAME(GET_HW_SPEC);
 450                 MWL8K_CMDNAME(SET_HW_SPEC);
 451                 MWL8K_CMDNAME(MAC_MULTICAST_ADR);
 452                 MWL8K_CMDNAME(GET_STAT);
 453                 MWL8K_CMDNAME(RADIO_CONTROL);
 454                 MWL8K_CMDNAME(RF_TX_POWER);
 455                 MWL8K_CMDNAME(TX_POWER);
 456                 MWL8K_CMDNAME(RF_ANTENNA);
 457                 MWL8K_CMDNAME(SET_BEACON);
 458                 MWL8K_CMDNAME(SET_PRE_SCAN);
 459                 MWL8K_CMDNAME(SET_POST_SCAN);
 460                 MWL8K_CMDNAME(SET_RF_CHANNEL);
 461                 MWL8K_CMDNAME(SET_AID);
 462                 MWL8K_CMDNAME(SET_RATE);
 463                 MWL8K_CMDNAME(SET_FINALIZE_JOIN);
 464                 MWL8K_CMDNAME(RTS_THRESHOLD);
 465                 MWL8K_CMDNAME(SET_SLOT);
 466                 MWL8K_CMDNAME(SET_EDCA_PARAMS);
 467                 MWL8K_CMDNAME(SET_WMM_MODE);
 468                 MWL8K_CMDNAME(MIMO_CONFIG);
 469                 MWL8K_CMDNAME(USE_FIXED_RATE);
 470                 MWL8K_CMDNAME(ENABLE_SNIFFER);
 471                 MWL8K_CMDNAME(SET_MAC_ADDR);
 472                 MWL8K_CMDNAME(SET_RATEADAPT_MODE);
 473                 MWL8K_CMDNAME(BSS_START);
 474                 MWL8K_CMDNAME(SET_NEW_STN);
 475                 MWL8K_CMDNAME(UPDATE_ENCRYPTION);
 476                 MWL8K_CMDNAME(UPDATE_STADB);
 477                 MWL8K_CMDNAME(BASTREAM);
 478                 MWL8K_CMDNAME(GET_WATCHDOG_BITMAP);
 479         default:
 480                 snprintf(buf, bufsize, "0x%x", cmd);
 481         }
 482 #undef MWL8K_CMDNAME
 483
 484         return buf;
 485 }
 486
 487 /* Hardware and firmware reset */
 488 static void mwl8k_hw_reset(struct mwl8k_priv *priv)
 489 {
 490         iowrite32(MWL8K_H2A_INT_RESET,
 491                 priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
 492         iowrite32(MWL8K_H2A_INT_RESET,
 493                 priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
 494         msleep(20);
 495 }
 496
 497 /* Release fw image */
 498 static void mwl8k_release_fw(const struct firmware **fw)
 499 {
 500         if (*fw == NULL)
 501                 return;
 502         release_firmware(*fw);
 503         *fw = NULL;
 504 }
 505
 506 static void mwl8k_release_firmware(struct mwl8k_priv *priv)
 507 {
 508         mwl8k_release_fw(&priv->fw_ucode);
 509         mwl8k_release_fw(&priv->fw_helper);
 510 }
 511
 512 /* states for asynchronous f/w loading */
 513 static void mwl8k_fw_state_machine(const struct firmware *fw, void *context);
 514 enum {
 515         FW_STATE_INIT = 0,
 516         FW_STATE_LOADING_PREF,
 517         FW_STATE_LOADING_ALT,
 518         FW_STATE_ERROR,
 519 };
 520
 521 /* Request fw image */
 522 static int mwl8k_request_fw(struct mwl8k_priv *priv,
 523                             const char *fname, const struct firmware **fw,
 524                             bool nowait)
 525 {
 526         /* release current image */
 527         if (*fw != NULL)
 528                 mwl8k_release_fw(fw);
 529
 530         if (nowait)
 531                 return request_firmware_nowait(THIS_MODULE, 1, fname,
 532                                                &priv->pdev->dev, GFP_KERNEL,
 533                                                priv, mwl8k_fw_state_machine);
 534         else
 535                 return request_firmware(fw, fname, &priv->pdev->dev);
 536 }
 537
 538 static int mwl8k_request_firmware(struct mwl8k_priv *priv, char *fw_image,
 539                                   bool nowait)
 540 {
 541         struct mwl8k_device_info *di = priv->device_info;
 542         int rc;
 543
 544         if (di->helper_image != NULL) {
 545                 if (nowait)
 546                         rc = mwl8k_request_fw(priv, di->helper_image,
 547                                               &priv->fw_helper, true);
 548                 else
 549                         rc = mwl8k_request_fw(priv, di->helper_image,
 550                                               &priv->fw_helper, false);
 551                 if (rc)
 552                         printk(KERN_ERR "%s: Error requesting helper fw %s\n",
 553                                pci_name(priv->pdev), di->helper_image);
 554
 555                 if (rc || nowait)
 556                         return rc;
 557         }
 558
 559         if (nowait) {
 560                 /*
 561                  * if we get here, no helper image is needed.  Skip the
 562                  * FW_STATE_INIT state.
 563                  */
 564                 priv->fw_state = FW_STATE_LOADING_PREF;
 565                 rc = mwl8k_request_fw(priv, fw_image,
 566                                       &priv->fw_ucode,
 567                                       true);
 568         } else
 569                 rc = mwl8k_request_fw(priv, fw_image,
 570                                       &priv->fw_ucode, false);
 571         if (rc) {
 572                 printk(KERN_ERR "%s: Error requesting firmware file %s\n",
 573                        pci_name(priv->pdev), fw_image);
 574                 mwl8k_release_fw(&priv->fw_helper);
 575                 return rc;
 576         }
 577
 578         return 0;
 579 }
 580
 581 struct mwl8k_cmd_pkt {
 582         __le16  code;
 583         __le16  length;
 584         __u8    seq_num;
 585         __u8    macid;
 586         __le16  result;
 587         char    payload[0];
 588 } __packed;
 589
 590 /*
 591  * Firmware loading.
 592  */
 593 static int
 594 mwl8k_send_fw_load_cmd(struct mwl8k_priv *priv, void *data, int length)
 595 {
 596         void __iomem *regs = priv->regs;
 597         dma_addr_t dma_addr;
 598         int loops;
 599
 600         dma_addr = pci_map_single(priv->pdev, data, length, PCI_DMA_TODEVICE);
 601         if (pci_dma_mapping_error(priv->pdev, dma_addr))
 602                 return -ENOMEM;
 603
 604         iowrite32(dma_addr, regs + MWL8K_HIU_GEN_PTR);
 605         iowrite32(0, regs + MWL8K_HIU_INT_CODE);
 606         iowrite32(MWL8K_H2A_INT_DOORBELL,
 607                 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
 608         iowrite32(MWL8K_H2A_INT_DUMMY,
 609                 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
 610
 611         loops = 1000;
 612         do {
 613                 u32 int_code;
 614                 if (priv->is_8764) {
 615                         int_code = ioread32(regs +
 616                                             MWL8K_HIU_H2A_INTERRUPT_STATUS);
 617                         if (int_code == 0)
 618                                 break;
 619                 } else {
 620                         int_code = ioread32(regs + MWL8K_HIU_INT_CODE);
 621                         if (int_code == MWL8K_INT_CODE_CMD_FINISHED) {
 622                                 iowrite32(0, regs + MWL8K_HIU_INT_CODE);
 623                                 break;
 624                         }
 625                 }
 626                 cond_resched();
 627                 udelay(1);
 628         } while (--loops);
 629
 630         pci_unmap_single(priv->pdev, dma_addr, length, PCI_DMA_TODEVICE);
 631
 632         return loops ? 0 : -ETIMEDOUT;
 633 }
 634
 635 static int mwl8k_load_fw_image(struct mwl8k_priv *priv,
 636                                 const u8 *data, size_t length)
 637 {
 638         struct mwl8k_cmd_pkt *cmd;
 639         int done;
 640         int rc = 0;
 641
 642         cmd = kmalloc(sizeof(*cmd) + 256, GFP_KERNEL);
 643         if (cmd == NULL)
 644                 return -ENOMEM;
 645
 646         cmd->code = cpu_to_le16(MWL8K_CMD_CODE_DNLD);
 647         cmd->seq_num = 0;
 648         cmd->macid = 0;
 649         cmd->result = 0;
 650
 651         done = 0;
 652         while (length) {
 653                 int block_size = length > 256 ? 256 : length;
 654
 655                 memcpy(cmd->payload, data + done, block_size);
 656                 cmd->length = cpu_to_le16(block_size);
 657
 658                 rc = mwl8k_send_fw_load_cmd(priv, cmd,
 659                                                 sizeof(*cmd) + block_size);
 660                 if (rc)
 661                         break;
 662
 663                 done += block_size;
 664                 length -= block_size;
 665         }
 666
 667         if (!rc) {
 668                 cmd->length = 0;
 669                 rc = mwl8k_send_fw_load_cmd(priv, cmd, sizeof(*cmd));
 670         }
 671
 672         kfree(cmd);
 673
 674         return rc;
 675 }
 676
 677 static int mwl8k_feed_fw_image(struct mwl8k_priv *priv,
 678                                 const u8 *data, size_t length)
 679 {
 680         unsigned char *buffer;
 681         int may_continue, rc = 0;
 682         u32 done, prev_block_size;
 683
 684         buffer = kmalloc(1024, GFP_KERNEL);
 685         if (buffer == NULL)
 686                 return -ENOMEM;
 687
 688         done = 0;
 689         prev_block_size = 0;
 690         may_continue = 1000;
 691         while (may_continue > 0) {
 692                 u32 block_size;
 693
 694                 block_size = ioread32(priv->regs + MWL8K_HIU_SCRATCH);
 695                 if (block_size & 1) {
 696                         block_size &= ~1;
 697                         may_continue--;
 698                 } else {
 699                         done += prev_block_size;
 700                         length -= prev_block_size;
 701                 }
 702
 703                 if (block_size > 1024 || block_size > length) {
 704                         rc = -EOVERFLOW;
 705                         break;
 706                 }
 707
 708                 if (length == 0) {
 709                         rc = 0;
 710                         break;
 711                 }
 712
 713                 if (block_size == 0) {
 714                         rc = -EPROTO;
 715                         may_continue--;
 716                         udelay(1);
 717                         continue;
 718                 }
 719
 720                 prev_block_size = block_size;
 721                 memcpy(buffer, data + done, block_size);
 722
 723                 rc = mwl8k_send_fw_load_cmd(priv, buffer, block_size);
 724                 if (rc)
 725                         break;
 726         }
 727
 728         if (!rc && length != 0)
 729                 rc = -EREMOTEIO;
 730
 731         kfree(buffer);
 732
 733         return rc;
 734 }
 735
 736 static int mwl8k_load_firmware(struct ieee80211_hw *hw)
 737 {
 738         struct mwl8k_priv *priv = hw->priv;
 739         const struct firmware *fw = priv->fw_ucode;
 740         int rc;
 741         int loops;
 742
 743         if (!memcmp(fw->data, "\x01\x00\x00\x00", 4) && !priv->is_8764) {
 744                 const struct firmware *helper = priv->fw_helper;
 745
 746                 if (helper == NULL) {
 747                         printk(KERN_ERR "%s: helper image needed but none "
 748                                "given\n", pci_name(priv->pdev));
 749                         return -EINVAL;
 750                 }
 751
 752                 rc = mwl8k_load_fw_image(priv, helper->data, helper->size);
 753                 if (rc) {
 754                         printk(KERN_ERR "%s: unable to load firmware "
 755                                "helper image\n", pci_name(priv->pdev));
 756                         return rc;
 757                 }
 758                 msleep(20);
 759
 760                 rc = mwl8k_feed_fw_image(priv, fw->data, fw->size);
 761         } else {
 762                 if (priv->is_8764)
 763                         rc = mwl8k_feed_fw_image(priv, fw->data, fw->size);
 764                 else
 765                         rc = mwl8k_load_fw_image(priv, fw->data, fw->size);
 766         }
 767
 768         if (rc) {
 769                 printk(KERN_ERR "%s: unable to load firmware image\n",
 770                        pci_name(priv->pdev));
 771                 return rc;
 772         }
 773
 774         iowrite32(MWL8K_MODE_STA, priv->regs + MWL8K_HIU_GEN_PTR);
 775
 776         loops = 500000;
 777         do {
 778                 u32 ready_code;
 779
 780                 ready_code = ioread32(priv->regs + MWL8K_HIU_INT_CODE);
 781                 if (ready_code == MWL8K_FWAP_READY) {
 782                         priv->ap_fw = true;
 783                         break;
 784                 } else if (ready_code == MWL8K_FWSTA_READY) {
 785                         priv->ap_fw = false;
 786                         break;
 787                 }
 788
 789                 cond_resched();
 790                 udelay(1);
 791         } while (--loops);
 792
 793         return loops ? 0 : -ETIMEDOUT;
 794 }
 795
 796
 797 /* DMA header used by firmware and hardware.  */
 798 struct mwl8k_dma_data {
 799         __le16 fwlen;
 800         struct ieee80211_hdr wh;
 801         char data[0];
 802 } __packed;
 803
 804 /* Routines to add/remove DMA header from skb.  */
 805 static inline void mwl8k_remove_dma_header(struct sk_buff *skb, __le16 qos)
 806 {
 807         struct mwl8k_dma_data *tr;
 808         int hdrlen;
 809
 810         tr = (struct mwl8k_dma_data *)skb->data;
 811         hdrlen = ieee80211_hdrlen(tr->wh.frame_control);
 812
 813         if (hdrlen != sizeof(tr->wh)) {
 814                 if (ieee80211_is_data_qos(tr->wh.frame_control)) {
 815                         memmove(tr->data - hdrlen, &tr->wh, hdrlen - 2);
 816                         *((__le16 *)(tr->data - 2)) = qos;
 817                 } else {
 818                         memmove(tr->data - hdrlen, &tr->wh, hdrlen);
 819                 }
 820         }
 821
 822         if (hdrlen != sizeof(*tr))
 823                 skb_pull(skb, sizeof(*tr) - hdrlen);
 824 }
 825
 826 #define REDUCED_TX_HEADROOM     8
 827
 828 static void
 829 mwl8k_add_dma_header(struct mwl8k_priv *priv, struct sk_buff *skb,
 830                                                 int head_pad, int tail_pad)
 831 {
 832         struct ieee80211_hdr *wh;
 833         int hdrlen;
 834         int reqd_hdrlen;
 835         struct mwl8k_dma_data *tr;
 836
 837         /*
 838          * Add a firmware DMA header; the firmware requires that we
 839          * present a 2-byte payload length followed by a 4-address
 840          * header (without QoS field), followed (optionally) by any
 841          * WEP/ExtIV header (but only filled in for CCMP).
 842          */
 843         wh = (struct ieee80211_hdr *)skb->data;
 844
 845         hdrlen = ieee80211_hdrlen(wh->frame_control);
 846
 847         /*
 848          * Check if skb_resize is required because of
 849          * tx_headroom adjustment.
 850          */
 851         if (priv->ap_fw && (hdrlen < (sizeof(struct ieee80211_cts)
 852                                                 + REDUCED_TX_HEADROOM))) {
 853                 if (pskb_expand_head(skb, REDUCED_TX_HEADROOM, 0, GFP_ATOMIC)) {
 854
 855                         wiphy_err(priv->hw->wiphy,
 856                                         "Failed to reallocate TX buffer\n");
 857                         return;
 858                 }
 859                 skb->truesize += REDUCED_TX_HEADROOM;
 860         }
 861
 862         reqd_hdrlen = sizeof(*tr) + head_pad;
 863
 864         if (hdrlen != reqd_hdrlen)
 865                 skb_push(skb, reqd_hdrlen - hdrlen);
 866
 867         if (ieee80211_is_data_qos(wh->frame_control))
 868                 hdrlen -= IEEE80211_QOS_CTL_LEN;
 869
 870         tr = (struct mwl8k_dma_data *)skb->data;
 871         if (wh != &tr->wh)
 872                 memmove(&tr->wh, wh, hdrlen);
 873         if (hdrlen != sizeof(tr->wh))
 874                 memset(((void *)&tr->wh) + hdrlen, 0, sizeof(tr->wh) - hdrlen);
 875
 876         /*
 877          * Firmware length is the length of the fully formed "802.11
 878          * payload".  That is, everything except for the 802.11 header.
 879          * This includes all crypto material including the MIC.
 880          */
 881         tr->fwlen = cpu_to_le16(skb->len - sizeof(*tr) + tail_pad);
 882 }
 883
 884 static void mwl8k_encapsulate_tx_frame(struct mwl8k_priv *priv,
 885                 struct sk_buff *skb)
 886 {
 887         struct ieee80211_hdr *wh;
 888         struct ieee80211_tx_info *tx_info;
 889         struct ieee80211_key_conf *key_conf;
 890         int data_pad;
 891         int head_pad = 0;
 892
 893         wh = (struct ieee80211_hdr *)skb->data;
 894
 895         tx_info = IEEE80211_SKB_CB(skb);
 896
 897         key_conf = NULL;
 898         if (ieee80211_is_data(wh->frame_control))
 899                 key_conf = tx_info->control.hw_key;
 900
 901         /*
 902          * Make sure the packet header is in the DMA header format (4-address
 903          * without QoS), and add head & tail padding when HW crypto is enabled.
 904          *
 905          * We have the following trailer padding requirements:
 906          * - WEP: 4 trailer bytes (ICV)
 907          * - TKIP: 12 trailer bytes (8 MIC + 4 ICV)
 908          * - CCMP: 8 trailer bytes (MIC)
 909          */
 910         data_pad = 0;
 911         if (key_conf != NULL) {
 912                 head_pad = key_conf->iv_len;
 913                 switch (key_conf->cipher) {
 914                 case WLAN_CIPHER_SUITE_WEP40:
 915                 case WLAN_CIPHER_SUITE_WEP104:
 916                         data_pad = 4;
 917                         break;
 918                 case WLAN_CIPHER_SUITE_TKIP:
 919                         data_pad = 12;
 920                         break;
 921                 case WLAN_CIPHER_SUITE_CCMP:
 922                         data_pad = 8;
 923                         break;
 924                 }
 925         }
 926         mwl8k_add_dma_header(priv, skb, head_pad, data_pad);
 927 }
 928
 929 /*
 930  * Packet reception for 88w8366/88w8764 AP firmware.
 931  */
 932 struct mwl8k_rxd_ap {
 933         __le16 pkt_len;
 934         __u8 sq2;
 935         __u8 rate;
 936         __le32 pkt_phys_addr;
 937         __le32 next_rxd_phys_addr;
 938         __le16 qos_control;
 939         __le16 htsig2;
 940         __le32 hw_rssi_info;
 941         __le32 hw_noise_floor_info;
 942         __u8 noise_floor;
 943         __u8 pad0[3];
 944         __u8 rssi;
 945         __u8 rx_status;
 946         __u8 channel;
 947         __u8 rx_ctrl;
 948 } __packed;
 949
 950 #define MWL8K_AP_RATE_INFO_MCS_FORMAT           0x80
 951 #define MWL8K_AP_RATE_INFO_40MHZ                0x40
 952 #define MWL8K_AP_RATE_INFO_RATEID(x)            ((x) & 0x3f)
 953
 954 #define MWL8K_AP_RX_CTRL_OWNED_BY_HOST          0x80
 955
 956 /* 8366/8764 AP rx_status bits */
 957 #define MWL8K_AP_RXSTAT_DECRYPT_ERR_MASK                0x80
 958 #define MWL8K_AP_RXSTAT_GENERAL_DECRYPT_ERR             0xFF
 959 #define MWL8K_AP_RXSTAT_TKIP_DECRYPT_MIC_ERR            0x02
 960 #define MWL8K_AP_RXSTAT_WEP_DECRYPT_ICV_ERR             0x04
 961 #define MWL8K_AP_RXSTAT_TKIP_DECRYPT_ICV_ERR            0x08
 962
 963 static void mwl8k_rxd_ap_init(void *_rxd, dma_addr_t next_dma_addr)
 964 {
 965         struct mwl8k_rxd_ap *rxd = _rxd;
 966
 967         rxd->next_rxd_phys_addr = cpu_to_le32(next_dma_addr);
 968         rxd->rx_ctrl = MWL8K_AP_RX_CTRL_OWNED_BY_HOST;
 969 }
 970
 971 static void mwl8k_rxd_ap_refill(void *_rxd, dma_addr_t addr, int len)
 972 {
 973         struct mwl8k_rxd_ap *rxd = _rxd;
 974
 975         rxd->pkt_len = cpu_to_le16(len);
 976         rxd->pkt_phys_addr = cpu_to_le32(addr);
 977         wmb();
 978         rxd->rx_ctrl = 0;
 979 }
 980
 981 static int
 982 mwl8k_rxd_ap_process(void *_rxd, struct ieee80211_rx_status *status,
 983                      __le16 *qos, s8 *noise)
 984 {
 985         struct mwl8k_rxd_ap *rxd = _rxd;
 986
 987         if (!(rxd->rx_ctrl & MWL8K_AP_RX_CTRL_OWNED_BY_HOST))
 988                 return -1;
 989         rmb();
 990
 991         memset(status, 0, sizeof(*status));
 992
 993         status->signal = -rxd->rssi;
 994         *noise = -rxd->noise_floor;
 995
 996         if (rxd->rate & MWL8K_AP_RATE_INFO_MCS_FORMAT) {
 997                 status->flag |= RX_FLAG_HT;
 998                 if (rxd->rate & MWL8K_AP_RATE_INFO_40MHZ)
 999                         status->flag |= RX_FLAG_40MHZ;
1000                 status->rate_idx = MWL8K_AP_RATE_INFO_RATEID(rxd->rate);
1001         } else {
1002                 int i;
1003
1004                 for (i = 0; i < ARRAY_SIZE(mwl8k_rates_24); i++) {
1005                         if (mwl8k_rates_24[i].hw_value == rxd->rate) {
1006                                 status->rate_idx = i;
1007                                 break;
1008                         }
1009                 }
1010         }
1011
1012         if (rxd->channel > 14) {
1013                 status->band = IEEE80211_BAND_5GHZ;
1014                 if (!(status->flag & RX_FLAG_HT))
1015                         status->rate_idx -= 5;
1016         } else {
1017                 status->band = IEEE80211_BAND_2GHZ;
1018         }
1019         status->freq = ieee80211_channel_to_frequency(rxd->channel,
1020                                                       status->band);
1021
1022         *qos = rxd->qos_control;
1023
1024         if ((rxd->rx_status != MWL8K_AP_RXSTAT_GENERAL_DECRYPT_ERR) &&
1025             (rxd->rx_status & MWL8K_AP_RXSTAT_DECRYPT_ERR_MASK) &&
1026             (rxd->rx_status & MWL8K_AP_RXSTAT_TKIP_DECRYPT_MIC_ERR))
1027                 status->flag |= RX_FLAG_MMIC_ERROR;
1028
1029         return le16_to_cpu(rxd->pkt_len);
1030 }
1031
1032 static struct rxd_ops rxd_ap_ops = {
1033         .rxd_size       = sizeof(struct mwl8k_rxd_ap),
1034         .rxd_init       = mwl8k_rxd_ap_init,
1035         .rxd_refill     = mwl8k_rxd_ap_refill,
1036         .rxd_process    = mwl8k_rxd_ap_process,
1037 };
1038
1039 /*
1040  * Packet reception for STA firmware.
1041  */
1042 struct mwl8k_rxd_sta {
1043         __le16 pkt_len;
1044         __u8 link_quality;
1045         __u8 noise_level;
1046         __le32 pkt_phys_addr;
1047         __le32 next_rxd_phys_addr;
1048         __le16 qos_control;
1049         __le16 rate_info;
1050         __le32 pad0[4];
1051         __u8 rssi;
1052         __u8 channel;
1053         __le16 pad1;
1054         __u8 rx_ctrl;
1055         __u8 rx_status;
1056         __u8 pad2[2];
1057 } __packed;
1058
1059 #define MWL8K_STA_RATE_INFO_SHORTPRE            0x8000
1060 #define MWL8K_STA_RATE_INFO_ANTSELECT(x)        (((x) >> 11) & 0x3)
1061 #define MWL8K_STA_RATE_INFO_RATEID(x)           (((x) >> 3) & 0x3f)
1062 #define MWL8K_STA_RATE_INFO_40MHZ               0x0004
1063 #define MWL8K_STA_RATE_INFO_SHORTGI             0x0002
1064 #define MWL8K_STA_RATE_INFO_MCS_FORMAT          0x0001
1065
1066 #define MWL8K_STA_RX_CTRL_OWNED_BY_HOST         0x02
1067 #define MWL8K_STA_RX_CTRL_DECRYPT_ERROR         0x04
1068 /* ICV=0 or MIC=1 */
1069 #define MWL8K_STA_RX_CTRL_DEC_ERR_TYPE          0x08
1070 /* Key is uploaded only in failure case */
1071 #define MWL8K_STA_RX_CTRL_KEY_INDEX                     0x30
1072
1073 static void mwl8k_rxd_sta_init(void *_rxd, dma_addr_t next_dma_addr)
1074 {
1075         struct mwl8k_rxd_sta *rxd = _rxd;
1076
1077         rxd->next_rxd_phys_addr = cpu_to_le32(next_dma_addr);
1078         rxd->rx_ctrl = MWL8K_STA_RX_CTRL_OWNED_BY_HOST;
1079 }
1080
1081 static void mwl8k_rxd_sta_refill(void *_rxd, dma_addr_t addr, int len)
1082 {
1083         struct mwl8k_rxd_sta *rxd = _rxd;
1084
1085         rxd->pkt_len = cpu_to_le16(len);
1086         rxd->pkt_phys_addr = cpu_to_le32(addr);
1087         wmb();
1088         rxd->rx_ctrl = 0;
1089 }
1090
1091 static int
1092 mwl8k_rxd_sta_process(void *_rxd, struct ieee80211_rx_status *status,
1093                        __le16 *qos, s8 *noise)
1094 {
1095         struct mwl8k_rxd_sta *rxd = _rxd;
1096         u16 rate_info;
1097
1098         if (!(rxd->rx_ctrl & MWL8K_STA_RX_CTRL_OWNED_BY_HOST))
1099                 return -1;
1100         rmb();
1101
1102         rate_info = le16_to_cpu(rxd->rate_info);
1103
1104         memset(status, 0, sizeof(*status));
1105
1106         status->signal = -rxd->rssi;
1107         *noise = -rxd->noise_level;
1108         status->antenna = MWL8K_STA_RATE_INFO_ANTSELECT(rate_info);
1109         status->rate_idx = MWL8K_STA_RATE_INFO_RATEID(rate_info);
1110
1111         if (rate_info & MWL8K_STA_RATE_INFO_SHORTPRE)
1112                 status->flag |= RX_FLAG_SHORTPRE;
1113         if (rate_info & MWL8K_STA_RATE_INFO_40MHZ)
1114                 status->flag |= RX_FLAG_40MHZ;
1115         if (rate_info & MWL8K_STA_RATE_INFO_SHORTGI)
1116                 status->flag |= RX_FLAG_SHORT_GI;
1117         if (rate_info & MWL8K_STA_RATE_INFO_MCS_FORMAT)
1118                 status->flag |= RX_FLAG_HT;
1119
1120         if (rxd->channel > 14) {
1121                 status->band = IEEE80211_BAND_5GHZ;
1122                 if (!(status->flag & RX_FLAG_HT))
1123                         status->rate_idx -= 5;
1124         } else {
1125                 status->band = IEEE80211_BAND_2GHZ;
1126         }
1127         status->freq = ieee80211_channel_to_frequency(rxd->channel,
1128                                                       status->band);
1129
1130         *qos = rxd->qos_control;
1131         if ((rxd->rx_ctrl & MWL8K_STA_RX_CTRL_DECRYPT_ERROR) &&
1132             (rxd->rx_ctrl & MWL8K_STA_RX_CTRL_DEC_ERR_TYPE))
1133                 status->flag |= RX_FLAG_MMIC_ERROR;
1134
1135         return le16_to_cpu(rxd->pkt_len);
1136 }
1137
1138 static struct rxd_ops rxd_sta_ops = {
1139         .rxd_size       = sizeof(struct mwl8k_rxd_sta),
1140         .rxd_init       = mwl8k_rxd_sta_init,
1141         .rxd_refill     = mwl8k_rxd_sta_refill,
1142         .rxd_process    = mwl8k_rxd_sta_process,
1143 };
1144
1145
1146 #define MWL8K_RX_DESCS          256
1147 #define MWL8K_RX_MAXSZ          3800
1148
1149 static int mwl8k_rxq_init(struct ieee80211_hw *hw, int index)
1150 {
1151         struct mwl8k_priv *priv = hw->priv;
1152         struct mwl8k_rx_queue *rxq = priv->rxq + index;
1153         int size;
1154         int i;
1155
1156         rxq->rxd_count = 0;
1157         rxq->head = 0;
1158         rxq->tail = 0;
1159
1160         size = MWL8K_RX_DESCS * priv->rxd_ops->rxd_size;
1161
1162         rxq->rxd = pci_zalloc_consistent(priv->pdev, size, &rxq->rxd_dma);
1163         if (rxq->rxd == NULL) {
1164                 wiphy_err(hw->wiphy, "failed to alloc RX descriptors\n");
1165                 return -ENOMEM;
1166         }
1167
1168         rxq->buf = kcalloc(MWL8K_RX_DESCS, sizeof(*rxq->buf), GFP_KERNEL);
1169         if (rxq->buf == NULL) {
1170                 pci_free_consistent(priv->pdev, size, rxq->rxd, rxq->rxd_dma);
1171                 return -ENOMEM;
1172         }
1173
1174         for (i = 0; i < MWL8K_RX_DESCS; i++) {
1175                 int desc_size;
1176                 void *rxd;
1177                 int nexti;
1178                 dma_addr_t next_dma_addr;
1179
1180                 desc_size = priv->rxd_ops->rxd_size;
1181                 rxd = rxq->rxd + (i * priv->rxd_ops->rxd_size);
1182
1183                 nexti = i + 1;
1184                 if (nexti == MWL8K_RX_DESCS)
1185                         nexti = 0;
1186                 next_dma_addr = rxq->rxd_dma + (nexti * desc_size);
1187
1188                 priv->rxd_ops->rxd_init(rxd, next_dma_addr);
1189         }
1190
1191         return 0;
1192 }
1193
1194 static int rxq_refill(struct ieee80211_hw *hw, int index, int limit)
1195 {
1196         struct mwl8k_priv *priv = hw->priv;
1197         struct mwl8k_rx_queue *rxq = priv->rxq + index;
1198         int refilled;
1199
1200         refilled = 0;
1201         while (rxq->rxd_count < MWL8K_RX_DESCS && limit--) {
1202                 struct sk_buff *skb;
1203                 dma_addr_t addr;
1204                 int rx;
1205                 void *rxd;
1206
1207                 skb = dev_alloc_skb(MWL8K_RX_MAXSZ);
1208                 if (skb == NULL)
1209                         break;
1210
1211                 addr = pci_map_single(priv->pdev, skb->data,
1212                                       MWL8K_RX_MAXSZ, DMA_FROM_DEVICE);
1213
1214                 rxq->rxd_count++;
1215                 rx = rxq->tail++;
1216                 if (rxq->tail == MWL8K_RX_DESCS)
1217                         rxq->tail = 0;
1218                 rxq->buf[rx].skb = skb;
1219                 dma_unmap_addr_set(&rxq->buf[rx], dma, addr);
1220
1221                 rxd = rxq->rxd + (rx * priv->rxd_ops->rxd_size);
1222                 priv->rxd_ops->rxd_refill(rxd, addr, MWL8K_RX_MAXSZ);
1223
1224                 refilled++;
1225         }
1226
1227         return refilled;
1228 }
1229
1230 /* Must be called only when the card's reception is completely halted */
1231 static void mwl8k_rxq_deinit(struct ieee80211_hw *hw, int index)
1232 {
1233         struct mwl8k_priv *priv = hw->priv;
1234         struct mwl8k_rx_queue *rxq = priv->rxq + index;
1235         int i;
1236
1237         if (rxq->rxd == NULL)
1238                 return;
1239
1240         for (i = 0; i < MWL8K_RX_DESCS; i++) {
1241                 if (rxq->buf[i].skb != NULL) {
1242                         pci_unmap_single(priv->pdev,
1243                                          dma_unmap_addr(&rxq->buf[i], dma),
1244                                          MWL8K_RX_MAXSZ, PCI_DMA_FROMDEVICE);
1245                         dma_unmap_addr_set(&rxq->buf[i], dma, 0);
1246
1247                         kfree_skb(rxq->buf[i].skb);
1248                         rxq->buf[i].skb = NULL;
1249                 }
1250         }
1251
1252         kfree(rxq->buf);
1253         rxq->buf = NULL;
1254
1255         pci_free_consistent(priv->pdev,
1256                             MWL8K_RX_DESCS * priv->rxd_ops->rxd_size,
1257                             rxq->rxd, rxq->rxd_dma);
1258         rxq->rxd = NULL;
1259 }
1260
1261
1262 /*
1263  * Scan a list of BSSIDs to process for finalize join.
1264  * Allows for extension to process multiple BSSIDs.
1265  */
1266 static inline int
1267 mwl8k_capture_bssid(struct mwl8k_priv *priv, struct ieee80211_hdr *wh)
1268 {
1269         return priv->capture_beacon &&
1270                 ieee80211_is_beacon(wh->frame_control) &&
1271                 ether_addr_equal_64bits(wh->addr3, priv->capture_bssid);
1272 }
1273
1274 static inline void mwl8k_save_beacon(struct ieee80211_hw *hw,
1275                                      struct sk_buff *skb)
1276 {
1277         struct mwl8k_priv *priv = hw->priv;
1278
1279         priv->capture_beacon = false;
1280         memset(priv->capture_bssid, 0, ETH_ALEN);
1281
1282         /*
1283          * Use GFP_ATOMIC as rxq_process is called from
1284          * the primary interrupt handler, memory allocation call
1285          * must not sleep.
1286          */
1287         priv->beacon_skb = skb_copy(skb, GFP_ATOMIC);
1288         if (priv->beacon_skb != NULL)
1289                 ieee80211_queue_work(hw, &priv->finalize_join_worker);
1290 }
1291
1292 static inline struct mwl8k_vif *mwl8k_find_vif_bss(struct list_head *vif_list,
1293                                                    u8 *bssid)
1294 {
1295         struct mwl8k_vif *mwl8k_vif;
1296
1297         list_for_each_entry(mwl8k_vif,
1298                             vif_list, list) {
1299                 if (memcmp(bssid, mwl8k_vif->bssid,
1300                            ETH_ALEN) == 0)
1301                         return mwl8k_vif;
1302         }
1303
1304         return NULL;
1305 }
1306
1307 static int rxq_process(struct ieee80211_hw *hw, int index, int limit)
1308 {
1309         struct mwl8k_priv *priv = hw->priv;
1310         struct mwl8k_vif *mwl8k_vif = NULL;
1311         struct mwl8k_rx_queue *rxq = priv->rxq + index;
1312         int processed;
1313
1314         processed = 0;
1315         while (rxq->rxd_count && limit--) {
1316                 struct sk_buff *skb;
1317                 void *rxd;
1318                 int pkt_len;
1319                 struct ieee80211_rx_status status;
1320                 struct ieee80211_hdr *wh;
1321                 __le16 qos;
1322
1323                 skb = rxq->buf[rxq->head].skb;
1324                 if (skb == NULL)
1325                         break;
1326
1327                 rxd = rxq->rxd + (rxq->head * priv->rxd_ops->rxd_size);
1328
1329                 pkt_len = priv->rxd_ops->rxd_process(rxd, &status, &qos,
1330                                                         &priv->noise);
1331                 if (pkt_len < 0)
1332                         break;
1333
1334                 rxq->buf[rxq->head].skb = NULL;
1335
1336                 pci_unmap_single(priv->pdev,
1337                                  dma_unmap_addr(&rxq->buf[rxq->head], dma),
1338                                  MWL8K_RX_MAXSZ, PCI_DMA_FROMDEVICE);
1339                 dma_unmap_addr_set(&rxq->buf[rxq->head], dma, 0);
1340
1341                 rxq->head++;
1342                 if (rxq->head == MWL8K_RX_DESCS)
1343                         rxq->head = 0;
1344
1345                 rxq->rxd_count--;
1346
1347                 wh = &((struct mwl8k_dma_data *)skb->data)->wh;
1348
1349                 /*
1350                  * Check for a pending join operation.  Save a
1351                  * copy of the beacon and schedule a tasklet to
1352                  * send a FINALIZE_JOIN command to the firmware.
1353                  */
1354                 if (mwl8k_capture_bssid(priv, (void *)skb->data))
1355                         mwl8k_save_beacon(hw, skb);
1356
1357                 if (ieee80211_has_protected(wh->frame_control)) {
1358
1359                         /* Check if hw crypto has been enabled for
1360                          * this bss. If yes, set the status flags
1361                          * accordingly
1362                          */
1363                         mwl8k_vif = mwl8k_find_vif_bss(&priv->vif_list,
1364                                                                 wh->addr1);
1365
1366                         if (mwl8k_vif != NULL &&
1367                             mwl8k_vif->is_hw_crypto_enabled) {
1368                                 /*
1369                                  * When MMIC ERROR is encountered
1370                                  * by the firmware, payload is
1371                                  * dropped and only 32 bytes of
1372                                  * mwl8k Firmware header is sent
1373                                  * to the host.
1374                                  *
1375                                  * We need to add four bytes of
1376                                  * key information.  In it
1377                                  * MAC80211 expects keyidx set to
1378                                  * 0 for triggering Counter
1379                                  * Measure of MMIC failure.
1380                                  */
1381                                 if (status.flag & RX_FLAG_MMIC_ERROR) {
1382                                         struct mwl8k_dma_data *tr;
1383                                         tr = (struct mwl8k_dma_data *)skb->data;
1384                                         memset((void *)&(tr->data), 0, 4);
1385                                         pkt_len += 4;
1386                                 }
1387
1388                                 if (!ieee80211_is_auth(wh->frame_control))
1389                                         status.flag |= RX_FLAG_IV_STRIPPED |
1390                                                        RX_FLAG_DECRYPTED |
1391                                                        RX_FLAG_MMIC_STRIPPED;
1392                         }
1393                 }
1394
1395                 skb_put(skb, pkt_len);
1396                 mwl8k_remove_dma_header(skb, qos);
1397                 memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
1398                 ieee80211_rx_irqsafe(hw, skb);
1399
1400                 processed++;
1401         }
1402
1403         return processed;
1404 }
1405
1406
1407 /*
1408  * Packet transmission.
1409  */
1410
1411 #define MWL8K_TXD_STATUS_OK                     0x00000001
1412 #define MWL8K_TXD_STATUS_OK_RETRY               0x00000002
1413 #define MWL8K_TXD_STATUS_OK_MORE_RETRY          0x00000004
1414 #define MWL8K_TXD_STATUS_MULTICAST_TX           0x00000008
1415 #define MWL8K_TXD_STATUS_FW_OWNED               0x80000000
1416
1417 #define MWL8K_QOS_QLEN_UNSPEC                   0xff00
1418 #define MWL8K_QOS_ACK_POLICY_MASK               0x0060
1419 #define MWL8K_QOS_ACK_POLICY_NORMAL             0x0000
1420 #define MWL8K_QOS_ACK_POLICY_BLOCKACK           0x0060
1421 #define MWL8K_QOS_EOSP                          0x0010
1422
1423 struct mwl8k_tx_desc {
1424         __le32 status;
1425         __u8 data_rate;
1426         __u8 tx_priority;
1427         __le16 qos_control;
1428         __le32 pkt_phys_addr;
1429         __le16 pkt_len;
1430         __u8 dest_MAC_addr[ETH_ALEN];
1431         __le32 next_txd_phys_addr;
1432         __le32 timestamp;
1433         __le16 rate_info;
1434         __u8 peer_id;
1435         __u8 tx_frag_cnt;
1436 } __packed;
1437
1438 #define MWL8K_TX_DESCS          128
1439
1440 static int mwl8k_txq_init(struct ieee80211_hw *hw, int index)
1441 {
1442         struct mwl8k_priv *priv = hw->priv;
1443         struct mwl8k_tx_queue *txq = priv->txq + index;
1444         int size;
1445         int i;
1446
1447         txq->len = 0;
1448         txq->head = 0;
1449         txq->tail = 0;
1450
1451         size = MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc);
1452
1453         txq->txd = pci_zalloc_consistent(priv->pdev, size, &txq->txd_dma);
1454         if (txq->txd == NULL) {
1455                 wiphy_err(hw->wiphy, "failed to alloc TX descriptors\n");
1456                 return -ENOMEM;
1457         }
1458
1459         txq->skb = kcalloc(MWL8K_TX_DESCS, sizeof(*txq->skb), GFP_KERNEL);
1460         if (txq->skb == NULL) {
1461                 pci_free_consistent(priv->pdev, size, txq->txd, txq->txd_dma);
1462                 return -ENOMEM;
1463         }
1464
1465         for (i = 0; i < MWL8K_TX_DESCS; i++) {
1466                 struct mwl8k_tx_desc *tx_desc;
1467                 int nexti;
1468
1469                 tx_desc = txq->txd + i;
1470                 nexti = (i + 1) % MWL8K_TX_DESCS;
1471
1472                 tx_desc->status = 0;
1473                 tx_desc->next_txd_phys_addr =
1474                         cpu_to_le32(txq->txd_dma + nexti * sizeof(*tx_desc));
1475         }
1476
1477         return 0;
1478 }
1479
1480 static inline void mwl8k_tx_start(struct mwl8k_priv *priv)
1481 {
1482         iowrite32(MWL8K_H2A_INT_PPA_READY,
1483                 priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
1484         iowrite32(MWL8K_H2A_INT_DUMMY,
1485                 priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
1486         ioread32(priv->regs + MWL8K_HIU_INT_CODE);
1487 }
1488
1489 static void mwl8k_dump_tx_rings(struct ieee80211_hw *hw)
1490 {
1491         struct mwl8k_priv *priv = hw->priv;
1492         int i;
1493
1494         for (i = 0; i < mwl8k_tx_queues(priv); i++) {
1495                 struct mwl8k_tx_queue *txq = priv->txq + i;
1496                 int fw_owned = 0;
1497                 int drv_owned = 0;
1498                 int unused = 0;
1499                 int desc;
1500
1501                 for (desc = 0; desc < MWL8K_TX_DESCS; desc++) {
1502                         struct mwl8k_tx_desc *tx_desc = txq->txd + desc;
1503                         u32 status;
1504
1505                         status = le32_to_cpu(tx_desc->status);
1506                         if (status & MWL8K_TXD_STATUS_FW_OWNED)
1507                                 fw_owned++;
1508                         else
1509                                 drv_owned++;
1510
1511                         if (tx_desc->pkt_len == 0)
1512                                 unused++;
1513                 }
1514
1515                 wiphy_err(hw->wiphy,
1516                           "txq[%d] len=%d head=%d tail=%d "
1517                           "fw_owned=%d drv_owned=%d unused=%d\n",
1518                           i,
1519                           txq->len, txq->head, txq->tail,
1520                           fw_owned, drv_owned, unused);
1521         }
1522 }
1523
1524 /*
1525  * Must be called with priv->fw_mutex held and tx queues stopped.
1526  */
1527 #define MWL8K_TX_WAIT_TIMEOUT_MS        5000
1528
1529 static int mwl8k_tx_wait_empty(struct ieee80211_hw *hw)
1530 {
1531         struct mwl8k_priv *priv = hw->priv;
1532         DECLARE_COMPLETION_ONSTACK(tx_wait);
1533         int retry;
1534         int rc;
1535
1536         might_sleep();
1537
1538         /* Since fw restart is in progress, allow only the firmware
1539          * commands from the restart code and block the other
1540          * commands since they are going to fail in any case since
1541          * the firmware has crashed
1542          */
1543         if (priv->hw_restart_in_progress) {
1544                 if (priv->hw_restart_owner == current)
1545                         return 0;
1546                 else
1547                         return -EBUSY;
1548         }
1549
1550         if (atomic_read(&priv->watchdog_event_pending))
1551                 return 0;
1552
1553         /*
1554          * The TX queues are stopped at this point, so this test
1555          * doesn't need to take ->tx_lock.
1556          */
1557         if (!priv->pending_tx_pkts)
1558                 return 0;
1559
1560         retry = 1;
1561         rc = 0;
1562
1563         spin_lock_bh(&priv->tx_lock);
1564         priv->tx_wait = &tx_wait;
1565         while (!rc) {
1566                 int oldcount;
1567                 unsigned long timeout;
1568
1569                 oldcount = priv->pending_tx_pkts;
1570
1571                 spin_unlock_bh(&priv->tx_lock);
1572                 timeout = wait_for_completion_timeout(&tx_wait,
1573                             msecs_to_jiffies(MWL8K_TX_WAIT_TIMEOUT_MS));
1574
1575                 if (atomic_read(&priv->watchdog_event_pending)) {
1576                         spin_lock_bh(&priv->tx_lock);
1577                         priv->tx_wait = NULL;
1578                         spin_unlock_bh(&priv->tx_lock);
1579                         return 0;
1580                 }
1581
1582                 spin_lock_bh(&priv->tx_lock);
1583
1584                 if (timeout || !priv->pending_tx_pkts) {
1585                         WARN_ON(priv->pending_tx_pkts);
1586                         if (retry)
1587                                 wiphy_notice(hw->wiphy, "tx rings drained\n");
1588                         break;
1589                 }
1590
1591                 if (retry) {
1592                         mwl8k_tx_start(priv);
1593                         retry = 0;
1594                         continue;
1595                 }
1596
1597                 if (priv->pending_tx_pkts < oldcount) {
1598                         wiphy_notice(hw->wiphy,
1599                                      "waiting for tx rings to drain (%d -> %d pkts)\n",
1600                                      oldcount, priv->pending_tx_pkts);
1601                         retry = 1;
1602                         continue;
1603                 }
1604
1605                 priv->tx_wait = NULL;
1606
1607                 wiphy_err(hw->wiphy, "tx rings stuck for %d ms\n",
1608                           MWL8K_TX_WAIT_TIMEOUT_MS);
1609                 mwl8k_dump_tx_rings(hw);
1610                 priv->hw_restart_in_progress = true;
1611                 ieee80211_queue_work(hw, &priv->fw_reload);
1612
1613                 rc = -ETIMEDOUT;
1614         }
1615         priv->tx_wait = NULL;
1616         spin_unlock_bh(&priv->tx_lock);
1617
1618         return rc;
1619 }
1620
1621 #define MWL8K_TXD_SUCCESS(status)                               \
1622         ((status) & (MWL8K_TXD_STATUS_OK |                      \
1623                      MWL8K_TXD_STATUS_OK_RETRY |                \
1624                      MWL8K_TXD_STATUS_OK_MORE_RETRY))
1625
1626 static int mwl8k_tid_queue_mapping(u8 tid)
1627 {
1628         BUG_ON(tid > 7);
1629
1630         switch (tid) {
1631         case 0:
1632         case 3:
1633                 return IEEE80211_AC_BE;
1634         case 1:
1635         case 2:
1636                 return IEEE80211_AC_BK;
1637         case 4:
1638         case 5:
1639                 return IEEE80211_AC_VI;
1640         case 6:
1641         case 7:
1642                 return IEEE80211_AC_VO;
1643         default:
1644                 return -1;
1645         }
1646 }
1647
1648 /* The firmware will fill in the rate information
1649  * for each packet that gets queued in the hardware
1650  * and these macros will interpret that info.
1651  */
1652
1653 #define RI_FORMAT(a)              (a & 0x0001)
1654 #define RI_RATE_ID_MCS(a)        ((a & 0x01f8) >> 3)
1655
1656 static int
1657 mwl8k_txq_reclaim(struct ieee80211_hw *hw, int index, int limit, int force)
1658 {
1659         struct mwl8k_priv *priv = hw->priv;
1660         struct mwl8k_tx_queue *txq = priv->txq + index;
1661         int processed;
1662
1663         processed = 0;
1664         while (txq->len > 0 && limit--) {
1665                 int tx;
1666                 struct mwl8k_tx_desc *tx_desc;
1667                 unsigned long addr;
1668                 int size;
1669                 struct sk_buff *skb;
1670                 struct ieee80211_tx_info *info;
1671                 u32 status;
1672                 struct ieee80211_sta *sta;
1673                 struct mwl8k_sta *sta_info = NULL;
1674                 u16 rate_info;
1675                 struct ieee80211_hdr *wh;
1676
1677                 tx = txq->head;
1678                 tx_desc = txq->txd + tx;
1679
1680                 status = le32_to_cpu(tx_desc->status);
1681
1682                 if (status & MWL8K_TXD_STATUS_FW_OWNED) {
1683                         if (!force)
1684                                 break;
1685                         tx_desc->status &=
1686                                 ~cpu_to_le32(MWL8K_TXD_STATUS_FW_OWNED);
1687                 }
1688
1689                 txq->head = (tx + 1) % MWL8K_TX_DESCS;
1690                 BUG_ON(txq->len == 0);
1691                 txq->len--;
1692                 priv->pending_tx_pkts--;
1693
1694                 addr = le32_to_cpu(tx_desc->pkt_phys_addr);
1695                 size = le16_to_cpu(tx_desc->pkt_len);
1696                 skb = txq->skb[tx];
1697                 txq->skb[tx] = NULL;
1698
1699                 BUG_ON(skb == NULL);
1700                 pci_unmap_single(priv->pdev, addr, size, PCI_DMA_TODEVICE);
1701
1702                 mwl8k_remove_dma_header(skb, tx_desc->qos_control);
1703
1704                 wh = (struct ieee80211_hdr *) skb->data;
1705
1706                 /* Mark descriptor as unused */
1707                 tx_desc->pkt_phys_addr = 0;
1708                 tx_desc->pkt_len = 0;
1709
1710                 info = IEEE80211_SKB_CB(skb);
1711                 if (ieee80211_is_data(wh->frame_control)) {
1712                         rcu_read_lock();
1713                         sta = ieee80211_find_sta_by_ifaddr(hw, wh->addr1,
1714                                                            wh->addr2);
1715                         if (sta) {
1716                                 sta_info = MWL8K_STA(sta);
1717                                 BUG_ON(sta_info == NULL);
1718                                 rate_info = le16_to_cpu(tx_desc->rate_info);
1719                                 /* If rate is < 6.5 Mpbs for an ht station
1720                                  * do not form an ampdu. If the station is a
1721                                  * legacy station (format = 0), do not form an
1722                                  * ampdu
1723                                  */
1724                                 if (RI_RATE_ID_MCS(rate_info) < 1 ||
1725                                     RI_FORMAT(rate_info) == 0) {
1726                                         sta_info->is_ampdu_allowed = false;
1727                                 } else {
1728                                         sta_info->is_ampdu_allowed = true;
1729                                 }
1730                         }
1731                         rcu_read_unlock();
1732                 }
1733
1734                 ieee80211_tx_info_clear_status(info);
1735
1736                 /* Rate control is happening in the firmware.
1737                  * Ensure no tx rate is being reported.
1738                  */
1739                 info->status.rates[0].idx = -1;
1740                 info->status.rates[0].count = 1;
1741
1742                 if (MWL8K_TXD_SUCCESS(status))
1743                         info->flags |= IEEE80211_TX_STAT_ACK;
1744
1745                 ieee80211_tx_status_irqsafe(hw, skb);
1746
1747                 processed++;
1748         }
1749
1750         return processed;
1751 }
1752
1753 /* must be called only when the card's transmit is completely halted */
1754 static void mwl8k_txq_deinit(struct ieee80211_hw *hw, int index)
1755 {
1756         struct mwl8k_priv *priv = hw->priv;
1757         struct mwl8k_tx_queue *txq = priv->txq + index;
1758
1759         if (txq->txd == NULL)
1760                 return;
1761
1762         mwl8k_txq_reclaim(hw, index, INT_MAX, 1);
1763
1764         kfree(txq->skb);
1765         txq->skb = NULL;
1766
1767         pci_free_consistent(priv->pdev,
1768                             MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc),
1769                             txq->txd, txq->txd_dma);
1770         txq->txd = NULL;
1771 }
1772
1773 /* caller must hold priv->stream_lock when calling the stream functions */
1774 static struct mwl8k_ampdu_stream *
1775 mwl8k_add_stream(struct ieee80211_hw *hw, struct ieee80211_sta *sta, u8 tid)
1776 {
1777         struct mwl8k_ampdu_stream *stream;
1778         struct mwl8k_priv *priv = hw->priv;
1779         int i;
1780
1781         for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
1782                 stream = &priv->ampdu[i];
1783                 if (stream->state == AMPDU_NO_STREAM) {
1784                         stream->sta = sta;
1785                         stream->state = AMPDU_STREAM_NEW;
1786                         stream->tid = tid;
1787                         stream->idx = i;
1788                         wiphy_debug(hw->wiphy, "Added a new stream for %pM %d",
1789                                     sta->addr, tid);
1790                         return stream;
1791                 }
1792         }
1793         return NULL;
1794 }
1795
1796 static int
1797 mwl8k_start_stream(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream)
1798 {
1799         int ret;
1800
1801         /* if the stream has already been started, don't start it again */
1802         if (stream->state != AMPDU_STREAM_NEW)
1803                 return 0;
1804         ret = ieee80211_start_tx_ba_session(stream->sta, stream->tid, 0);
1805         if (ret)
1806                 wiphy_debug(hw->wiphy, "Failed to start stream for %pM %d: "
1807                             "%d\n", stream->sta->addr, stream->tid, ret);
1808         else
1809                 wiphy_debug(hw->wiphy, "Started stream for %pM %d\n",
1810                             stream->sta->addr, stream->tid);
1811         return ret;
1812 }
1813
1814 static void
1815 mwl8k_remove_stream(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream)
1816 {
1817         wiphy_debug(hw->wiphy, "Remove stream for %pM %d\n", stream->sta->addr,
1818                     stream->tid);
1819         memset(stream, 0, sizeof(*stream));
1820 }
1821
1822 static struct mwl8k_ampdu_stream *
1823 mwl8k_lookup_stream(struct ieee80211_hw *hw, u8 *addr, u8 tid)
1824 {
1825         struct mwl8k_priv *priv = hw->priv;
1826         int i;
1827
1828         for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
1829                 struct mwl8k_ampdu_stream *stream;
1830                 stream = &priv->ampdu[i];
1831                 if (stream->state == AMPDU_NO_STREAM)
1832                         continue;
1833                 if (!memcmp(stream->sta->addr, addr, ETH_ALEN) &&
1834                     stream->tid == tid)
1835                         return stream;
1836         }
1837         return NULL;
1838 }
1839
1840 #define MWL8K_AMPDU_PACKET_THRESHOLD 64
1841 static inline bool mwl8k_ampdu_allowed(struct ieee80211_sta *sta, u8 tid)
1842 {
1843         struct mwl8k_sta *sta_info = MWL8K_STA(sta);
1844         struct tx_traffic_info *tx_stats;
1845
1846         BUG_ON(tid >= MWL8K_MAX_TID);
1847         tx_stats = &sta_info->tx_stats[tid];
1848
1849         return sta_info->is_ampdu_allowed &&
1850                 tx_stats->pkts > MWL8K_AMPDU_PACKET_THRESHOLD;
1851 }
1852
1853 static inline void mwl8k_tx_count_packet(struct ieee80211_sta *sta, u8 tid)
1854 {
1855         struct mwl8k_sta *sta_info = MWL8K_STA(sta);
1856         struct tx_traffic_info *tx_stats;
1857
1858         BUG_ON(tid >= MWL8K_MAX_TID);
1859         tx_stats = &sta_info->tx_stats[tid];
1860
1861         if (tx_stats->start_time == 0)
1862                 tx_stats->start_time = jiffies;
1863
1864         /* reset the packet count after each second elapses.  If the number of
1865          * packets ever exceeds the ampdu_min_traffic threshold, we will allow
1866          * an ampdu stream to be started.
1867          */
1868         if (jiffies - tx_stats->start_time > HZ) {
1869                 tx_stats->pkts = 0;
1870                 tx_stats->start_time = 0;
1871         } else
1872                 tx_stats->pkts++;
1873 }
1874
1875 /* The hardware ampdu queues start from 5.
1876  * txpriorities for ampdu queues are
1877  * 5 6 7 0 1 2 3 4 ie., queue 5 is highest
1878  * and queue 3 is lowest (queue 4 is reserved)
1879  */
1880 #define BA_QUEUE                5
1881
1882 static void
1883 mwl8k_txq_xmit(struct ieee80211_hw *hw,
1884                int index,
1885                struct ieee80211_sta *sta,
1886                struct sk_buff *skb)
1887 {
1888         struct mwl8k_priv *priv = hw->priv;
1889         struct ieee80211_tx_info *tx_info;
1890         struct mwl8k_vif *mwl8k_vif;
1891         struct ieee80211_hdr *wh;
1892         struct mwl8k_tx_queue *txq;
1893         struct mwl8k_tx_desc *tx;
1894         dma_addr_t dma;
1895         u32 txstatus;
1896         u8 txdatarate;
1897         u16 qos;
1898         int txpriority;
1899         u8 tid = 0;
1900         struct mwl8k_ampdu_stream *stream = NULL;
1901         bool start_ba_session = false;
1902         bool mgmtframe = false;
1903         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
1904         bool eapol_frame = false;
1905
1906         wh = (struct ieee80211_hdr *)skb->data;
1907         if (ieee80211_is_data_qos(wh->frame_control))
1908                 qos = le16_to_cpu(*((__le16 *)ieee80211_get_qos_ctl(wh)));
1909         else
1910                 qos = 0;
1911
1912         if (skb->protocol == cpu_to_be16(ETH_P_PAE))
1913                 eapol_frame = true;
1914
1915         if (ieee80211_is_mgmt(wh->frame_control))
1916                 mgmtframe = true;
1917
1918         if (priv->ap_fw)
1919                 mwl8k_encapsulate_tx_frame(priv, skb);
1920         else
1921                 mwl8k_add_dma_header(priv, skb, 0, 0);
1922
1923         wh = &((struct mwl8k_dma_data *)skb->data)->wh;
1924
1925         tx_info = IEEE80211_SKB_CB(skb);
1926         mwl8k_vif = MWL8K_VIF(tx_info->control.vif);
1927
1928         if (tx_info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
1929                 wh->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1930                 wh->seq_ctrl |= cpu_to_le16(mwl8k_vif->seqno);
1931                 mwl8k_vif->seqno += 0x10;
1932         }
1933
1934         /* Setup firmware control bit fields for each frame type.  */
1935         txstatus = 0;
1936         txdatarate = 0;
1937         if (ieee80211_is_mgmt(wh->frame_control) ||
1938             ieee80211_is_ctl(wh->frame_control)) {
1939                 txdatarate = 0;
1940                 qos |= MWL8K_QOS_QLEN_UNSPEC | MWL8K_QOS_EOSP;
1941         } else if (ieee80211_is_data(wh->frame_control)) {
1942                 txdatarate = 1;
1943                 if (is_multicast_ether_addr(wh->addr1))
1944                         txstatus |= MWL8K_TXD_STATUS_MULTICAST_TX;
1945
1946                 qos &= ~MWL8K_QOS_ACK_POLICY_MASK;
1947                 if (tx_info->flags & IEEE80211_TX_CTL_AMPDU)
1948                         qos |= MWL8K_QOS_ACK_POLICY_BLOCKACK;
1949                 else
1950                         qos |= MWL8K_QOS_ACK_POLICY_NORMAL;
1951         }
1952
1953         /* Queue ADDBA request in the respective data queue.  While setting up
1954          * the ampdu stream, mac80211 queues further packets for that
1955          * particular ra/tid pair.  However, packets piled up in the hardware
1956          * for that ra/tid pair will still go out. ADDBA request and the
1957          * related data packets going out from different queues asynchronously
1958          * will cause a shift in the receiver window which might result in
1959          * ampdu packets getting dropped at the receiver after the stream has
1960          * been setup.
1961          */
1962         if (unlikely(ieee80211_is_action(wh->frame_control) &&
1963             mgmt->u.action.category == WLAN_CATEGORY_BACK &&
1964             mgmt->u.action.u.addba_req.action_code == WLAN_ACTION_ADDBA_REQ &&
1965             priv->ap_fw)) {
1966                 u16 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1967                 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1968                 index = mwl8k_tid_queue_mapping(tid);
1969         }
1970
1971         txpriority = index;
1972
1973         if (priv->ap_fw && sta && sta->ht_cap.ht_supported && !eapol_frame &&
1974             ieee80211_is_data_qos(wh->frame_control)) {
1975                 tid = qos & 0xf;
1976                 mwl8k_tx_count_packet(sta, tid);
1977                 spin_lock(&priv->stream_lock);
1978                 stream = mwl8k_lookup_stream(hw, sta->addr, tid);
1979                 if (stream != NULL) {
1980                         if (stream->state == AMPDU_STREAM_ACTIVE) {
1981                                 WARN_ON(!(qos & MWL8K_QOS_ACK_POLICY_BLOCKACK));
1982                                 txpriority = (BA_QUEUE + stream->idx) %
1983                                              TOTAL_HW_TX_QUEUES;
1984                                 if (stream->idx <= 1)
1985                                         index = stream->idx +
1986                                                 MWL8K_TX_WMM_QUEUES;
1987
1988                         } else if (stream->state == AMPDU_STREAM_NEW) {
1989                                 /* We get here if the driver sends us packets
1990                                  * after we've initiated a stream, but before
1991                                  * our ampdu_action routine has been called
1992                                  * with IEEE80211_AMPDU_TX_START to get the SSN
1993                                  * for the ADDBA request.  So this packet can
1994                                  * go out with no risk of sequence number
1995                                  * mismatch.  No special handling is required.
1996                                  */
1997                         } else {
1998                                 /* Drop packets that would go out after the
1999                                  * ADDBA request was sent but before the ADDBA
2000                                  * response is received.  If we don't do this,
2001                                  * the recipient would probably receive it
2002                                  * after the ADDBA request with SSN 0.  This
2003                                  * will cause the recipient's BA receive window
2004                                  * to shift, which would cause the subsequent
2005                                  * packets in the BA stream to be discarded.
2006                                  * mac80211 queues our packets for us in this
2007                                  * case, so this is really just a safety check.
2008                                  */
2009                                 wiphy_warn(hw->wiphy,
2010                                            "Cannot send packet while ADDBA "
2011                                            "dialog is underway.\n");
2012                                 spin_unlock(&priv->stream_lock);
2013                                 dev_kfree_skb(skb);
2014                                 return;
2015                         }
2016                 } else {
2017                         /* Defer calling mwl8k_start_stream so that the current
2018                          * skb can go out before the ADDBA request.  This
2019                          * prevents sequence number mismatch at the recepient
2020                          * as described above.
2021                          */
2022                         if (mwl8k_ampdu_allowed(sta, tid)) {
2023                                 stream = mwl8k_add_stream(hw, sta, tid);
2024                                 if (stream != NULL)
2025                                         start_ba_session = true;
2026                         }
2027                 }
2028                 spin_unlock(&priv->stream_lock);
2029         } else {
2030                 qos &= ~MWL8K_QOS_ACK_POLICY_MASK;
2031                 qos |= MWL8K_QOS_ACK_POLICY_NORMAL;
2032         }
2033
2034         dma = pci_map_single(priv->pdev, skb->data,
2035                                 skb->len, PCI_DMA_TODEVICE);
2036
2037         if (pci_dma_mapping_error(priv->pdev, dma)) {
2038                 wiphy_debug(hw->wiphy,
2039                             "failed to dma map skb, dropping TX frame.\n");
2040                 if (start_ba_session) {
2041                         spin_lock(&priv->stream_lock);
2042                         mwl8k_remove_stream(hw, stream);
2043                         spin_unlock(&priv->stream_lock);
2044                 }
2045                 dev_kfree_skb(skb);
2046                 return;
2047         }
2048
2049         spin_lock_bh(&priv->tx_lock);
2050
2051         txq = priv->txq + index;
2052
2053         /* Mgmt frames that go out frequently are probe
2054          * responses. Other mgmt frames got out relatively
2055          * infrequently. Hence reserve 2 buffers so that
2056          * other mgmt frames do not get dropped due to an
2057          * already queued probe response in one of the
2058          * reserved buffers.
2059          */
2060
2061         if (txq->len >= MWL8K_TX_DESCS - 2) {
2062                 if (!mgmtframe || txq->len == MWL8K_TX_DESCS) {
2063                         if (start_ba_session) {
2064                                 spin_lock(&priv->stream_lock);
2065                                 mwl8k_remove_stream(hw, stream);
2066                                 spin_unlock(&priv->stream_lock);
2067                         }
2068                         mwl8k_tx_start(priv);
2069                         spin_unlock_bh(&priv->tx_lock);
2070                         pci_unmap_single(priv->pdev, dma, skb->len,
2071                                          PCI_DMA_TODEVICE);
2072                         dev_kfree_skb(skb);
2073                         return;
2074                 }
2075         }
2076
2077         BUG_ON(txq->skb[txq->tail] != NULL);
2078         txq->skb[txq->tail] = skb;
2079
2080         tx = txq->txd + txq->tail;
2081         tx->data_rate = txdatarate;
2082         tx->tx_priority = txpriority;
2083         tx->qos_control = cpu_to_le16(qos);
2084         tx->pkt_phys_addr = cpu_to_le32(dma);
2085         tx->pkt_len = cpu_to_le16(skb->len);
2086         tx->rate_info = 0;
2087         if (!priv->ap_fw && sta != NULL)
2088                 tx->peer_id = MWL8K_STA(sta)->peer_id;
2089         else
2090                 tx->peer_id = 0;
2091
2092         if (priv->ap_fw && ieee80211_is_data(wh->frame_control) && !eapol_frame)
2093                 tx->timestamp = cpu_to_le32(ioread32(priv->regs +
2094                                                 MWL8K_HW_TIMER_REGISTER));
2095         else
2096                 tx->timestamp = 0;
2097
2098         wmb();
2099         tx->status = cpu_to_le32(MWL8K_TXD_STATUS_FW_OWNED | txstatus);
2100
2101         txq->len++;
2102         priv->pending_tx_pkts++;
2103
2104         txq->tail++;
2105         if (txq->tail == MWL8K_TX_DESCS)
2106                 txq->tail = 0;
2107
2108         mwl8k_tx_start(priv);
2109
2110         spin_unlock_bh(&priv->tx_lock);
2111
2112         /* Initiate the ampdu session here */
2113         if (start_ba_session) {
2114                 spin_lock(&priv->stream_lock);
2115                 if (mwl8k_start_stream(hw, stream))
2116                         mwl8k_remove_stream(hw, stream);
2117                 spin_unlock(&priv->stream_lock);
2118         }
2119 }
2120
2121
2122 /*
2123  * Firmware access.
2124  *
2125  * We have the following requirements for issuing firmware commands:
2126  * - Some commands require that the packet transmit path is idle when
2127  *   the command is issued.  (For simplicity, we'll just quiesce the
2128  *   transmit path for every command.)
2129  * - There are certain sequences of commands that need to be issued to
2130  *   the hardware sequentially, with no other intervening commands.
2131  *
2132  * This leads to an implementation of a "firmware lock" as a mutex that
2133  * can be taken recursively, and which is taken by both the low-level
2134  * command submission function (mwl8k_post_cmd) as well as any users of
2135  * that function that require issuing of an atomic sequence of commands,
2136  * and quiesces the transmit path whenever it's taken.
2137  */
2138 static int mwl8k_fw_lock(struct ieee80211_hw *hw)
2139 {
2140         struct mwl8k_priv *priv = hw->priv;
2141
2142         if (priv->fw_mutex_owner != current) {
2143                 int rc;
2144
2145                 mutex_lock(&priv->fw_mutex);
2146                 ieee80211_stop_queues(hw);
2147
2148                 rc = mwl8k_tx_wait_empty(hw);
2149                 if (rc) {
2150                         if (!priv->hw_restart_in_progress)
2151                                 ieee80211_wake_queues(hw);
2152
2153                         mutex_unlock(&priv->fw_mutex);
2154
2155                         return rc;
2156                 }
2157
2158                 priv->fw_mutex_owner = current;
2159         }
2160
2161         priv->fw_mutex_depth++;
2162
2163         return 0;
2164 }
2165
2166 static void mwl8k_fw_unlock(struct ieee80211_hw *hw)
2167 {
2168         struct mwl8k_priv *priv = hw->priv;
2169
2170         if (!--priv->fw_mutex_depth) {
2171                 if (!priv->hw_restart_in_progress)
2172                         ieee80211_wake_queues(hw);
2173
2174                 priv->fw_mutex_owner = NULL;
2175                 mutex_unlock(&priv->fw_mutex);
2176         }
2177 }
2178
2179 static void mwl8k_enable_bsses(struct ieee80211_hw *hw, bool enable,
2180                                u32 bitmap);
2181
2182 /*
2183  * Command processing.
2184  */
2185
2186 /* Timeout firmware commands after 10s */
2187 #define MWL8K_CMD_TIMEOUT_MS    10000
2188
2189 static int mwl8k_post_cmd(struct ieee80211_hw *hw, struct mwl8k_cmd_pkt *cmd)
2190 {
2191         DECLARE_COMPLETION_ONSTACK(cmd_wait);
2192         struct mwl8k_priv *priv = hw->priv;
2193         void __iomem *regs = priv->regs;
2194         dma_addr_t dma_addr;
2195         unsigned int dma_size;
2196         int rc;
2197         unsigned long timeout = 0;
2198         u8 buf[32];
2199         u32 bitmap = 0;
2200
2201         wiphy_dbg(hw->wiphy, "Posting %s [%d]\n",
2202                   mwl8k_cmd_name(cmd->code, buf, sizeof(buf)), cmd->macid);
2203
2204         /* Before posting firmware commands that could change the hardware
2205          * characteristics, make sure that all BSSes are stopped temporary.
2206          * Enable these stopped BSSes after completion of the commands
2207          */
2208
2209         rc = mwl8k_fw_lock(hw);
2210         if (rc)
2211                 return rc;
2212
2213         if (priv->ap_fw && priv->running_bsses) {
2214                 switch (le16_to_cpu(cmd->code)) {
2215                 case MWL8K_CMD_SET_RF_CHANNEL:
2216                 case MWL8K_CMD_RADIO_CONTROL:
2217                 case MWL8K_CMD_RF_TX_POWER:
2218                 case MWL8K_CMD_TX_POWER:
2219                 case MWL8K_CMD_RF_ANTENNA:
2220                 case MWL8K_CMD_RTS_THRESHOLD:
2221                 case MWL8K_CMD_MIMO_CONFIG:
2222                         bitmap = priv->running_bsses;
2223                         mwl8k_enable_bsses(hw, false, bitmap);
2224                         break;
2225                 }
2226         }
2227
2228         cmd->result = (__force __le16) 0xffff;
2229         dma_size = le16_to_cpu(cmd->length);
2230         dma_addr = pci_map_single(priv->pdev, cmd, dma_size,
2231                                   PCI_DMA_BIDIRECTIONAL);
2232         if (pci_dma_mapping_error(priv->pdev, dma_addr))
2233                 return -ENOMEM;
2234
2235         priv->hostcmd_wait = &cmd_wait;
2236         iowrite32(dma_addr, regs + MWL8K_HIU_GEN_PTR);
2237         iowrite32(MWL8K_H2A_INT_DOORBELL,
2238                 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
2239         iowrite32(MWL8K_H2A_INT_DUMMY,
2240                 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
2241
2242         timeout = wait_for_completion_timeout(&cmd_wait,
2243                                 msecs_to_jiffies(MWL8K_CMD_TIMEOUT_MS));
2244
2245         priv->hostcmd_wait = NULL;
2246
2247
2248         pci_unmap_single(priv->pdev, dma_addr, dma_size,
2249                                         PCI_DMA_BIDIRECTIONAL);
2250
2251         if (!timeout) {
2252                 wiphy_err(hw->wiphy, "Command %s timeout after %u ms\n",
2253                           mwl8k_cmd_name(cmd->code, buf, sizeof(buf)),
2254                           MWL8K_CMD_TIMEOUT_MS);
2255                 rc = -ETIMEDOUT;
2256         } else {
2257                 int ms;
2258
2259                 ms = MWL8K_CMD_TIMEOUT_MS - jiffies_to_msecs(timeout);
2260
2261                 rc = cmd->result ? -EINVAL : 0;
2262                 if (rc)
2263                         wiphy_err(hw->wiphy, "Command %s error 0x%x\n",
2264                                   mwl8k_cmd_name(cmd->code, buf, sizeof(buf)),
2265                                   le16_to_cpu(cmd->result));
2266                 else if (ms > 2000)
2267                         wiphy_notice(hw->wiphy, "Command %s took %d ms\n",
2268                                      mwl8k_cmd_name(cmd->code,
2269                                                     buf, sizeof(buf)),
2270                                      ms);
2271         }
2272
2273         if (bitmap)
2274                 mwl8k_enable_bsses(hw, true, bitmap);
2275
2276         mwl8k_fw_unlock(hw);
2277
2278         return rc;
2279 }
2280
2281 static int mwl8k_post_pervif_cmd(struct ieee80211_hw *hw,
2282                                  struct ieee80211_vif *vif,
2283                                  struct mwl8k_cmd_pkt *cmd)
2284 {
2285         if (vif != NULL)
2286                 cmd->macid = MWL8K_VIF(vif)->macid;
2287         return mwl8k_post_cmd(hw, cmd);
2288 }
2289
2290 /*
2291  * Setup code shared between STA and AP firmware images.
2292  */
2293 static void mwl8k_setup_2ghz_band(struct ieee80211_hw *hw)
2294 {
2295         struct mwl8k_priv *priv = hw->priv;
2296
2297         BUILD_BUG_ON(sizeof(priv->channels_24) != sizeof(mwl8k_channels_24));
2298         memcpy(priv->channels_24, mwl8k_channels_24, sizeof(mwl8k_channels_24));
2299
2300         BUILD_BUG_ON(sizeof(priv->rates_24) != sizeof(mwl8k_rates_24));
2301         memcpy(priv->rates_24, mwl8k_rates_24, sizeof(mwl8k_rates_24));
2302
2303         priv->band_24.band = IEEE80211_BAND_2GHZ;
2304         priv->band_24.channels = priv->channels_24;
2305         priv->band_24.n_channels = ARRAY_SIZE(mwl8k_channels_24);
2306         priv->band_24.bitrates = priv->rates_24;
2307         priv->band_24.n_bitrates = ARRAY_SIZE(mwl8k_rates_24);
2308
2309         hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &priv->band_24;
2310 }
2311
2312 static void mwl8k_setup_5ghz_band(struct ieee80211_hw *hw)
2313 {
2314         struct mwl8k_priv *priv = hw->priv;
2315
2316         BUILD_BUG_ON(sizeof(priv->channels_50) != sizeof(mwl8k_channels_50));
2317         memcpy(priv->channels_50, mwl8k_channels_50, sizeof(mwl8k_channels_50));
2318
2319         BUILD_BUG_ON(sizeof(priv->rates_50) != sizeof(mwl8k_rates_50));
2320         memcpy(priv->rates_50, mwl8k_rates_50, sizeof(mwl8k_rates_50));
2321
2322         priv->band_50.band = IEEE80211_BAND_5GHZ;
2323         priv->band_50.channels = priv->channels_50;
2324         priv->band_50.n_channels = ARRAY_SIZE(mwl8k_channels_50);
2325         priv->band_50.bitrates = priv->rates_50;
2326         priv->band_50.n_bitrates = ARRAY_SIZE(mwl8k_rates_50);
2327
2328         hw->wiphy->bands[IEEE80211_BAND_5GHZ] = &priv->band_50;
2329 }
2330
2331 /*
2332  * CMD_GET_HW_SPEC (STA version).
2333  */
2334 struct mwl8k_cmd_get_hw_spec_sta {
2335         struct mwl8k_cmd_pkt header;
2336         __u8 hw_rev;
2337         __u8 host_interface;
2338         __le16 num_mcaddrs;
2339         __u8 perm_addr[ETH_ALEN];
2340         __le16 region_code;
2341         __le32 fw_rev;
2342         __le32 ps_cookie;
2343         __le32 caps;
2344         __u8 mcs_bitmap[16];
2345         __le32 rx_queue_ptr;
2346         __le32 num_tx_queues;
2347         __le32 tx_queue_ptrs[MWL8K_TX_WMM_QUEUES];
2348         __le32 caps2;
2349         __le32 num_tx_desc_per_queue;
2350         __le32 total_rxd;
2351 } __packed;
2352
2353 #define MWL8K_CAP_MAX_AMSDU             0x20000000
2354 #define MWL8K_CAP_GREENFIELD            0x08000000
2355 #define MWL8K_CAP_AMPDU                 0x04000000
2356 #define MWL8K_CAP_RX_STBC               0x01000000
2357 #define MWL8K_CAP_TX_STBC               0x00800000
2358 #define MWL8K_CAP_SHORTGI_40MHZ         0x00400000
2359 #define MWL8K_CAP_SHORTGI_20MHZ         0x00200000
2360 #define MWL8K_CAP_RX_ANTENNA_MASK       0x000e0000
2361 #define MWL8K_CAP_TX_ANTENNA_MASK       0x0001c000
2362 #define MWL8K_CAP_DELAY_BA              0x00003000
2363 #define MWL8K_CAP_MIMO                  0x00000200
2364 #define MWL8K_CAP_40MHZ                 0x00000100
2365 #define MWL8K_CAP_BAND_MASK             0x00000007
2366 #define MWL8K_CAP_5GHZ                  0x00000004
2367 #define MWL8K_CAP_2GHZ4                 0x00000001
2368
2369 static void
2370 mwl8k_set_ht_caps(struct ieee80211_hw *hw,
2371                   struct ieee80211_supported_band *band, u32 cap)
2372 {
2373         int rx_streams;
2374         int tx_streams;
2375
2376         band->ht_cap.ht_supported = 1;
2377
2378         if (cap & MWL8K_CAP_MAX_AMSDU)
2379                 band->ht_cap.cap |= IEEE80211_HT_CAP_MAX_AMSDU;
2380         if (cap & MWL8K_CAP_GREENFIELD)
2381                 band->ht_cap.cap |= IEEE80211_HT_CAP_GRN_FLD;
2382         if (cap & MWL8K_CAP_AMPDU) {
2383                 hw->flags |= IEEE80211_HW_AMPDU_AGGREGATION;
2384                 band->ht_cap.ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
2385                 band->ht_cap.ampdu_density = IEEE80211_HT_MPDU_DENSITY_NONE;
2386         }
2387         if (cap & MWL8K_CAP_RX_STBC)
2388                 band->ht_cap.cap |= IEEE80211_HT_CAP_RX_STBC;
2389         if (cap & MWL8K_CAP_TX_STBC)
2390                 band->ht_cap.cap |= IEEE80211_HT_CAP_TX_STBC;
2391         if (cap & MWL8K_CAP_SHORTGI_40MHZ)
2392                 band->ht_cap.cap |= IEEE80211_HT_CAP_SGI_40;
2393         if (cap & MWL8K_CAP_SHORTGI_20MHZ)
2394                 band->ht_cap.cap |= IEEE80211_HT_CAP_SGI_20;
2395         if (cap & MWL8K_CAP_DELAY_BA)
2396                 band->ht_cap.cap |= IEEE80211_HT_CAP_DELAY_BA;
2397         if (cap & MWL8K_CAP_40MHZ)
2398                 band->ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2399
2400         rx_streams = hweight32(cap & MWL8K_CAP_RX_ANTENNA_MASK);
2401         tx_streams = hweight32(cap & MWL8K_CAP_TX_ANTENNA_MASK);
2402
2403         band->ht_cap.mcs.rx_mask[0] = 0xff;
2404         if (rx_streams >= 2)
2405                 band->ht_cap.mcs.rx_mask[1] = 0xff;
2406         if (rx_streams >= 3)
2407                 band->ht_cap.mcs.rx_mask[2] = 0xff;
2408         band->ht_cap.mcs.rx_mask[4] = 0x01;
2409         band->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
2410
2411         if (rx_streams != tx_streams) {
2412                 band->ht_cap.mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
2413                 band->ht_cap.mcs.tx_params |= (tx_streams - 1) <<
2414                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
2415         }
2416 }
2417
2418 static void
2419 mwl8k_set_caps(struct ieee80211_hw *hw, u32 caps)
2420 {
2421         struct mwl8k_priv *priv = hw->priv;
2422
2423         if (priv->caps)
2424                 return;
2425
2426         if ((caps & MWL8K_CAP_2GHZ4) || !(caps & MWL8K_CAP_BAND_MASK)) {
2427                 mwl8k_setup_2ghz_band(hw);
2428                 if (caps & MWL8K_CAP_MIMO)
2429                         mwl8k_set_ht_caps(hw, &priv->band_24, caps);
2430         }
2431
2432         if (caps & MWL8K_CAP_5GHZ) {
2433                 mwl8k_setup_5ghz_band(hw);
2434                 if (caps & MWL8K_CAP_MIMO)
2435                         mwl8k_set_ht_caps(hw, &priv->band_50, caps);
2436         }
2437
2438         priv->caps = caps;
2439 }
2440
2441 static int mwl8k_cmd_get_hw_spec_sta(struct ieee80211_hw *hw)
2442 {
2443         struct mwl8k_priv *priv = hw->priv;
2444         struct mwl8k_cmd_get_hw_spec_sta *cmd;
2445         int rc;
2446         int i;
2447
2448         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2449         if (cmd == NULL)
2450                 return -ENOMEM;
2451
2452         cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_HW_SPEC);
2453         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2454
2455         memset(cmd->perm_addr, 0xff, sizeof(cmd->perm_addr));
2456         cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
2457         cmd->rx_queue_ptr = cpu_to_le32(priv->rxq[0].rxd_dma);
2458         cmd->num_tx_queues = cpu_to_le32(mwl8k_tx_queues(priv));
2459         for (i = 0; i < mwl8k_tx_queues(priv); i++)
2460                 cmd->tx_queue_ptrs[i] = cpu_to_le32(priv->txq[i].txd_dma);
2461         cmd->num_tx_desc_per_queue = cpu_to_le32(MWL8K_TX_DESCS);
2462         cmd->total_rxd = cpu_to_le32(MWL8K_RX_DESCS);
2463
2464         rc = mwl8k_post_cmd(hw, &cmd->header);
2465
2466         if (!rc) {
2467                 SET_IEEE80211_PERM_ADDR(hw, cmd->perm_addr);
2468                 priv->num_mcaddrs = le16_to_cpu(cmd->num_mcaddrs);
2469                 priv->fw_rev = le32_to_cpu(cmd->fw_rev);
2470                 priv->hw_rev = cmd->hw_rev;
2471                 mwl8k_set_caps(hw, le32_to_cpu(cmd->caps));
2472                 priv->ap_macids_supported = 0x00000000;
2473                 priv->sta_macids_supported = 0x00000001;
2474         }
2475
2476         kfree(cmd);
2477         return rc;
2478 }
2479
2480 /*
2481  * CMD_GET_HW_SPEC (AP version).
2482  */
2483 struct mwl8k_cmd_get_hw_spec_ap {
2484         struct mwl8k_cmd_pkt header;
2485         __u8 hw_rev;
2486         __u8 host_interface;
2487         __le16 num_wcb;
2488         __le16 num_mcaddrs;
2489         __u8 perm_addr[ETH_ALEN];
2490         __le16 region_code;
2491         __le16 num_antenna;
2492         __le32 fw_rev;
2493         __le32 wcbbase0;
2494         __le32 rxwrptr;
2495         __le32 rxrdptr;
2496         __le32 ps_cookie;
2497         __le32 wcbbase1;
2498         __le32 wcbbase2;
2499         __le32 wcbbase3;
2500         __le32 fw_api_version;
2501         __le32 caps;
2502         __le32 num_of_ampdu_queues;
2503         __le32 wcbbase_ampdu[MWL8K_MAX_AMPDU_QUEUES];
2504 } __packed;
2505
2506 static int mwl8k_cmd_get_hw_spec_ap(struct ieee80211_hw *hw)
2507 {
2508         struct mwl8k_priv *priv = hw->priv;
2509         struct mwl8k_cmd_get_hw_spec_ap *cmd;
2510         int rc, i;
2511         u32 api_version;
2512
2513         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2514         if (cmd == NULL)
2515                 return -ENOMEM;
2516
2517         cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_HW_SPEC);
2518         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2519
2520         memset(cmd->perm_addr, 0xff, sizeof(cmd->perm_addr));
2521         cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
2522
2523         rc = mwl8k_post_cmd(hw, &cmd->header);
2524
2525         if (!rc) {
2526                 int off;
2527
2528                 api_version = le32_to_cpu(cmd->fw_api_version);
2529                 if (priv->device_info->fw_api_ap != api_version) {
2530                         printk(KERN_ERR "%s: Unsupported fw API version for %s."
2531                                "  Expected %d got %d.\n", MWL8K_NAME,
2532                                priv->device_info->part_name,
2533                                priv->device_info->fw_api_ap,
2534                                api_version);
2535                         rc = -EINVAL;
2536                         goto done;
2537                 }
2538                 SET_IEEE80211_PERM_ADDR(hw, cmd->perm_addr);
2539                 priv->num_mcaddrs = le16_to_cpu(cmd->num_mcaddrs);
2540                 priv->fw_rev = le32_to_cpu(cmd->fw_rev);
2541                 priv->hw_rev = cmd->hw_rev;
2542                 mwl8k_set_caps(hw, le32_to_cpu(cmd->caps));
2543                 priv->ap_macids_supported = 0x000000ff;
2544                 priv->sta_macids_supported = 0x00000100;
2545                 priv->num_ampdu_queues = le32_to_cpu(cmd->num_of_ampdu_queues);
2546                 if (priv->num_ampdu_queues > MWL8K_MAX_AMPDU_QUEUES) {
2547                         wiphy_warn(hw->wiphy, "fw reported %d ampdu queues"
2548                                    " but we only support %d.\n",
2549                                    priv->num_ampdu_queues,
2550                                    MWL8K_MAX_AMPDU_QUEUES);
2551                         priv->num_ampdu_queues = MWL8K_MAX_AMPDU_QUEUES;
2552                 }
2553                 off = le32_to_cpu(cmd->rxwrptr) & 0xffff;
2554                 iowrite32(priv->rxq[0].rxd_dma, priv->sram + off);
2555
2556                 off = le32_to_cpu(cmd->rxrdptr) & 0xffff;
2557                 iowrite32(priv->rxq[0].rxd_dma, priv->sram + off);
2558
2559                 priv->txq_offset[0] = le32_to_cpu(cmd->wcbbase0) & 0xffff;
2560                 priv->txq_offset[1] = le32_to_cpu(cmd->wcbbase1) & 0xffff;
2561                 priv->txq_offset[2] = le32_to_cpu(cmd->wcbbase2) & 0xffff;
2562                 priv->txq_offset[3] = le32_to_cpu(cmd->wcbbase3) & 0xffff;
2563
2564                 for (i = 0; i < priv->num_ampdu_queues; i++)
2565                         priv->txq_offset[i + MWL8K_TX_WMM_QUEUES] =
2566                                 le32_to_cpu(cmd->wcbbase_ampdu[i]) & 0xffff;
2567         }
2568
2569 done:
2570         kfree(cmd);
2571         return rc;
2572 }
2573
2574 /*
2575  * CMD_SET_HW_SPEC.
2576  */
2577 struct mwl8k_cmd_set_hw_spec {
2578         struct mwl8k_cmd_pkt header;
2579         __u8 hw_rev;
2580         __u8 host_interface;
2581         __le16 num_mcaddrs;
2582         __u8 perm_addr[ETH_ALEN];
2583         __le16 region_code;
2584         __le32 fw_rev;
2585         __le32 ps_cookie;
2586         __le32 caps;
2587         __le32 rx_queue_ptr;
2588         __le32 num_tx_queues;
2589         __le32 tx_queue_ptrs[MWL8K_MAX_TX_QUEUES];
2590         __le32 flags;
2591         __le32 num_tx_desc_per_queue;
2592         __le32 total_rxd;
2593 } __packed;
2594
2595 /* If enabled, MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY will cause
2596  * packets to expire 500 ms after the timestamp in the tx descriptor.  That is,
2597  * the packets that are queued for more than 500ms, will be dropped in the
2598  * hardware. This helps minimizing the issues caused due to head-of-line
2599  * blocking where a slow client can hog the bandwidth and affect traffic to a
2600  * faster client.
2601  */
2602 #define MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY  0x00000400
2603 #define MWL8K_SET_HW_SPEC_FLAG_GENERATE_CCMP_HDR        0x00000200
2604 #define MWL8K_SET_HW_SPEC_FLAG_HOST_DECR_MGMT           0x00000080
2605 #define MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_PROBERESP       0x00000020
2606 #define MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_BEACON          0x00000010
2607
2608 static int mwl8k_cmd_set_hw_spec(struct ieee80211_hw *hw)
2609 {
2610         struct mwl8k_priv *priv = hw->priv;
2611         struct mwl8k_cmd_set_hw_spec *cmd;
2612         int rc;
2613         int i;
2614
2615         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2616         if (cmd == NULL)
2617                 return -ENOMEM;
2618
2619         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_HW_SPEC);
2620         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2621
2622         cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
2623         cmd->rx_queue_ptr = cpu_to_le32(priv->rxq[0].rxd_dma);
2624         cmd->num_tx_queues = cpu_to_le32(mwl8k_tx_queues(priv));
2625
2626         /*
2627          * Mac80211 stack has Q0 as highest priority and Q3 as lowest in
2628          * that order. Firmware has Q3 as highest priority and Q0 as lowest
2629          * in that order. Map Q3 of mac80211 to Q0 of firmware so that the
2630          * priority is interpreted the right way in firmware.
2631          */
2632         for (i = 0; i < mwl8k_tx_queues(priv); i++) {
2633                 int j = mwl8k_tx_queues(priv) - 1 - i;
2634                 cmd->tx_queue_ptrs[i] = cpu_to_le32(priv->txq[j].txd_dma);
2635         }
2636
2637         cmd->flags = cpu_to_le32(MWL8K_SET_HW_SPEC_FLAG_HOST_DECR_MGMT |
2638                                  MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_PROBERESP |
2639                                  MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_BEACON |
2640                                  MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY |
2641                                  MWL8K_SET_HW_SPEC_FLAG_GENERATE_CCMP_HDR);
2642         cmd->num_tx_desc_per_queue = cpu_to_le32(MWL8K_TX_DESCS);
2643         cmd->total_rxd = cpu_to_le32(MWL8K_RX_DESCS);
2644
2645         rc = mwl8k_post_cmd(hw, &cmd->header);
2646         kfree(cmd);
2647
2648         return rc;
2649 }
2650
2651 /*
2652  * CMD_MAC_MULTICAST_ADR.
2653  */
2654 struct mwl8k_cmd_mac_multicast_adr {
2655         struct mwl8k_cmd_pkt header;
2656         __le16 action;
2657         __le16 numaddr;
2658         __u8 addr[0][ETH_ALEN];
2659 };
2660
2661 #define MWL8K_ENABLE_RX_DIRECTED        0x0001
2662 #define MWL8K_ENABLE_RX_MULTICAST       0x0002
2663 #define MWL8K_ENABLE_RX_ALL_MULTICAST   0x0004
2664 #define MWL8K_ENABLE_RX_BROADCAST       0x0008
2665
2666 static struct mwl8k_cmd_pkt *
2667 __mwl8k_cmd_mac_multicast_adr(struct ieee80211_hw *hw, int allmulti,
2668                               struct netdev_hw_addr_list *mc_list)
2669 {
2670         struct mwl8k_priv *priv = hw->priv;
2671         struct mwl8k_cmd_mac_multicast_adr *cmd;
2672         int size;
2673         int mc_count = 0;
2674
2675         if (mc_list)
2676                 mc_count = netdev_hw_addr_list_count(mc_list);
2677
2678         if (allmulti || mc_count > priv->num_mcaddrs) {
2679                 allmulti = 1;
2680                 mc_count = 0;
2681         }
2682
2683         size = sizeof(*cmd) + mc_count * ETH_ALEN;
2684
2685         cmd = kzalloc(size, GFP_ATOMIC);
2686         if (cmd == NULL)
2687                 return NULL;
2688
2689         cmd->header.code = cpu_to_le16(MWL8K_CMD_MAC_MULTICAST_ADR);
2690         cmd->header.length = cpu_to_le16(size);
2691         cmd->action = cpu_to_le16(MWL8K_ENABLE_RX_DIRECTED |
2692                                   MWL8K_ENABLE_RX_BROADCAST);
2693
2694         if (allmulti) {
2695                 cmd->action |= cpu_to_le16(MWL8K_ENABLE_RX_ALL_MULTICAST);
2696         } else if (mc_count) {
2697                 struct netdev_hw_addr *ha;
2698                 int i = 0;
2699
2700                 cmd->action |= cpu_to_le16(MWL8K_ENABLE_RX_MULTICAST);
2701                 cmd->numaddr = cpu_to_le16(mc_count);
2702                 netdev_hw_addr_list_for_each(ha, mc_list) {
2703                         memcpy(cmd->addr[i], ha->addr, ETH_ALEN);
2704                 }
2705         }
2706
2707         return &cmd->header;
2708 }
2709
2710 /*
2711  * CMD_GET_STAT.
2712  */
2713 struct mwl8k_cmd_get_stat {
2714         struct mwl8k_cmd_pkt header;
2715         __le32 stats[64];
2716 } __packed;
2717
2718 #define MWL8K_STAT_ACK_FAILURE  9
2719 #define MWL8K_STAT_RTS_FAILURE  12
2720 #define MWL8K_STAT_FCS_ERROR    24
2721 #define MWL8K_STAT_RTS_SUCCESS  11
2722
2723 static int mwl8k_cmd_get_stat(struct ieee80211_hw *hw,
2724                               struct ieee80211_low_level_stats *stats)
2725 {
2726         struct mwl8k_cmd_get_stat *cmd;
2727         int rc;
2728
2729         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2730         if (cmd == NULL)
2731                 return -ENOMEM;
2732
2733         cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_STAT);
2734         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2735
2736         rc = mwl8k_post_cmd(hw, &cmd->header);
2737         if (!rc) {
2738                 stats->dot11ACKFailureCount =
2739                         le32_to_cpu(cmd->stats[MWL8K_STAT_ACK_FAILURE]);
2740                 stats->dot11RTSFailureCount =
2741                         le32_to_cpu(cmd->stats[MWL8K_STAT_RTS_FAILURE]);
2742                 stats->dot11FCSErrorCount =
2743                         le32_to_cpu(cmd->stats[MWL8K_STAT_FCS_ERROR]);
2744                 stats->dot11RTSSuccessCount =
2745                         le32_to_cpu(cmd->stats[MWL8K_STAT_RTS_SUCCESS]);
2746         }
2747         kfree(cmd);
2748
2749         return rc;
2750 }
2751
2752 /*
2753  * CMD_RADIO_CONTROL.
2754  */
2755 struct mwl8k_cmd_radio_control {
2756         struct mwl8k_cmd_pkt header;
2757         __le16 action;
2758         __le16 control;
2759         __le16 radio_on;
2760 } __packed;
2761
2762 static int
2763 mwl8k_cmd_radio_control(struct ieee80211_hw *hw, bool enable, bool force)
2764 {
2765         struct mwl8k_priv *priv = hw->priv;
2766         struct mwl8k_cmd_radio_control *cmd;
2767         int rc;
2768
2769         if (enable == priv->radio_on && !force)
2770                 return 0;
2771
2772         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2773         if (cmd == NULL)
2774                 return -ENOMEM;
2775
2776         cmd->header.code = cpu_to_le16(MWL8K_CMD_RADIO_CONTROL);
2777         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2778         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
2779         cmd->control = cpu_to_le16(priv->radio_short_preamble ? 3 : 1);
2780         cmd->radio_on = cpu_to_le16(enable ? 0x0001 : 0x0000);
2781
2782         rc = mwl8k_post_cmd(hw, &cmd->header);
2783         kfree(cmd);
2784
2785         if (!rc)
2786                 priv->radio_on = enable;
2787
2788         return rc;
2789 }
2790
2791 static int mwl8k_cmd_radio_disable(struct ieee80211_hw *hw)
2792 {
2793         return mwl8k_cmd_radio_control(hw, 0, 0);
2794 }
2795
2796 static int mwl8k_cmd_radio_enable(struct ieee80211_hw *hw)
2797 {
2798         return mwl8k_cmd_radio_control(hw, 1, 0);
2799 }
2800
2801 static int
2802 mwl8k_set_radio_preamble(struct ieee80211_hw *hw, bool short_preamble)
2803 {
2804         struct mwl8k_priv *priv = hw->priv;
2805
2806         priv->radio_short_preamble = short_preamble;
2807
2808         return mwl8k_cmd_radio_control(hw, 1, 1);
2809 }
2810
2811 /*
2812  * CMD_RF_TX_POWER.
2813  */
2814 #define MWL8K_RF_TX_POWER_LEVEL_TOTAL   8
2815
2816 struct mwl8k_cmd_rf_tx_power {
2817         struct mwl8k_cmd_pkt header;
2818         __le16 action;
2819         __le16 support_level;
2820         __le16 current_level;
2821         __le16 reserved;
2822         __le16 power_level_list[MWL8K_RF_TX_POWER_LEVEL_TOTAL];
2823 } __packed;
2824
2825 static int mwl8k_cmd_rf_tx_power(struct ieee80211_hw *hw, int dBm)
2826 {
2827         struct mwl8k_cmd_rf_tx_power *cmd;
2828         int rc;
2829
2830         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2831         if (cmd == NULL)
2832                 return -ENOMEM;
2833
2834         cmd->header.code = cpu_to_le16(MWL8K_CMD_RF_TX_POWER);
2835         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2836         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
2837         cmd->support_level = cpu_to_le16(dBm);
2838
2839         rc = mwl8k_post_cmd(hw, &cmd->header);
2840         kfree(cmd);
2841
2842         return rc;
2843 }
2844
2845 /*
2846  * CMD_TX_POWER.
2847  */
2848 #define MWL8K_TX_POWER_LEVEL_TOTAL      12
2849
2850 struct mwl8k_cmd_tx_power {
2851         struct mwl8k_cmd_pkt header;
2852         __le16 action;
2853         __le16 band;
2854         __le16 channel;
2855         __le16 bw;
2856         __le16 sub_ch;
2857         __le16 power_level_list[MWL8K_TX_POWER_LEVEL_TOTAL];
2858 } __packed;
2859
2860 static int mwl8k_cmd_tx_power(struct ieee80211_hw *hw,
2861                                      struct ieee80211_conf *conf,
2862                                      unsigned short pwr)
2863 {
2864         struct ieee80211_channel *channel = conf->chandef.chan;
2865         enum nl80211_channel_type channel_type =
2866                 cfg80211_get_chandef_type(&conf->chandef);
2867         struct mwl8k_cmd_tx_power *cmd;
2868         int rc;
2869         int i;
2870
2871         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2872         if (cmd == NULL)
2873                 return -ENOMEM;
2874
2875         cmd->header.code = cpu_to_le16(MWL8K_CMD_TX_POWER);
2876         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2877         cmd->action = cpu_to_le16(MWL8K_CMD_SET_LIST);
2878
2879         if (channel->band == IEEE80211_BAND_2GHZ)
2880                 cmd->band = cpu_to_le16(0x1);
2881         else if (channel->band == IEEE80211_BAND_5GHZ)
2882                 cmd->band = cpu_to_le16(0x4);
2883
2884         cmd->channel = cpu_to_le16(channel->hw_value);
2885
2886         if (channel_type == NL80211_CHAN_NO_HT ||
2887             channel_type == NL80211_CHAN_HT20) {
2888                 cmd->bw = cpu_to_le16(0x2);
2889         } else {
2890                 cmd->bw = cpu_to_le16(0x4);
2891                 if (channel_type == NL80211_CHAN_HT40MINUS)
2892                         cmd->sub_ch = cpu_to_le16(0x3);
2893                 else if (channel_type == NL80211_CHAN_HT40PLUS)
2894                         cmd->sub_ch = cpu_to_le16(0x1);
2895         }
2896
2897         for (i = 0; i < MWL8K_TX_POWER_LEVEL_TOTAL; i++)
2898                 cmd->power_level_list[i] = cpu_to_le16(pwr);
2899
2900         rc = mwl8k_post_cmd(hw, &cmd->header);
2901         kfree(cmd);
2902
2903         return rc;
2904 }
2905
2906 /*
2907  * CMD_RF_ANTENNA.
2908  */
2909 struct mwl8k_cmd_rf_antenna {
2910         struct mwl8k_cmd_pkt header;
2911         __le16 antenna;
2912         __le16 mode;
2913 } __packed;
2914
2915 #define MWL8K_RF_ANTENNA_RX             1
2916 #define MWL8K_RF_ANTENNA_TX             2
2917
2918 static int
2919 mwl8k_cmd_rf_antenna(struct ieee80211_hw *hw, int antenna, int mask)
2920 {
2921         struct mwl8k_cmd_rf_antenna *cmd;
2922         int rc;
2923
2924         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2925         if (cmd == NULL)
2926                 return -ENOMEM;
2927
2928         cmd->header.code = cpu_to_le16(MWL8K_CMD_RF_ANTENNA);
2929         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2930         cmd->antenna = cpu_to_le16(antenna);
2931         cmd->mode = cpu_to_le16(mask);
2932
2933         rc = mwl8k_post_cmd(hw, &cmd->header);
2934         kfree(cmd);
2935
2936         return rc;
2937 }
2938
2939 /*
2940  * CMD_SET_BEACON.
2941  */
2942 struct mwl8k_cmd_set_beacon {
2943         struct mwl8k_cmd_pkt header;
2944         __le16 beacon_len;
2945         __u8 beacon[0];
2946 };
2947
2948 static int mwl8k_cmd_set_beacon(struct ieee80211_hw *hw,
2949                                 struct ieee80211_vif *vif, u8 *beacon, int len)
2950 {
2951         struct mwl8k_cmd_set_beacon *cmd;
2952         int rc;
2953
2954         cmd = kzalloc(sizeof(*cmd) + len, GFP_KERNEL);
2955         if (cmd == NULL)
2956                 return -ENOMEM;
2957
2958         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_BEACON);
2959         cmd->header.length = cpu_to_le16(sizeof(*cmd) + len);
2960         cmd->beacon_len = cpu_to_le16(len);
2961         memcpy(cmd->beacon, beacon, len);
2962
2963         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
2964         kfree(cmd);
2965
2966         return rc;
2967 }
2968
2969 /*
2970  * CMD_SET_PRE_SCAN.
2971  */
2972 struct mwl8k_cmd_set_pre_scan {
2973         struct mwl8k_cmd_pkt header;
2974 } __packed;
2975
2976 static int mwl8k_cmd_set_pre_scan(struct ieee80211_hw *hw)
2977 {
2978         struct mwl8k_cmd_set_pre_scan *cmd;
2979         int rc;
2980
2981         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2982         if (cmd == NULL)
2983                 return -ENOMEM;
2984
2985         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_PRE_SCAN);
2986         cmd->header.length = cpu_to_le16(sizeof(*cmd));
2987
2988         rc = mwl8k_post_cmd(hw, &cmd->header);
2989         kfree(cmd);
2990
2991         return rc;
2992 }
2993
2994 /*
2995  * CMD_BBP_REG_ACCESS.
2996  */
2997 struct mwl8k_cmd_bbp_reg_access {
2998         struct mwl8k_cmd_pkt header;
2999         __le16 action;
3000         __le16 offset;
3001         u8 value;
3002         u8 rsrv[3];
3003 } __packed;
3004
3005 static int
3006 mwl8k_cmd_bbp_reg_access(struct ieee80211_hw *hw,
3007                          u16 action,
3008                          u16 offset,
3009                          u8 *value)
3010 {
3011         struct mwl8k_cmd_bbp_reg_access *cmd;
3012         int rc;
3013
3014         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3015         if (cmd == NULL)
3016                 return -ENOMEM;
3017
3018         cmd->header.code = cpu_to_le16(MWL8K_CMD_BBP_REG_ACCESS);
3019         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3020         cmd->action = cpu_to_le16(action);
3021         cmd->offset = cpu_to_le16(offset);
3022
3023         rc = mwl8k_post_cmd(hw, &cmd->header);
3024
3025         if (!rc)
3026                 *value = cmd->value;
3027         else
3028                 *value = 0;
3029
3030         kfree(cmd);
3031
3032         return rc;
3033 }
3034
3035 /*
3036  * CMD_SET_POST_SCAN.
3037  */
3038 struct mwl8k_cmd_set_post_scan {
3039         struct mwl8k_cmd_pkt header;
3040         __le32 isibss;
3041         __u8 bssid[ETH_ALEN];
3042 } __packed;
3043
3044 static int
3045 mwl8k_cmd_set_post_scan(struct ieee80211_hw *hw, const __u8 *mac)
3046 {
3047         struct mwl8k_cmd_set_post_scan *cmd;
3048         int rc;
3049
3050         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3051         if (cmd == NULL)
3052                 return -ENOMEM;
3053
3054         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_POST_SCAN);
3055         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3056         cmd->isibss = 0;
3057         memcpy(cmd->bssid, mac, ETH_ALEN);
3058
3059         rc = mwl8k_post_cmd(hw, &cmd->header);
3060         kfree(cmd);
3061
3062         return rc;
3063 }
3064
3065 static int freq_to_idx(struct mwl8k_priv *priv, int freq)
3066 {
3067         struct ieee80211_supported_band *sband;
3068         int band, ch, idx = 0;
3069
3070         for (band = IEEE80211_BAND_2GHZ; band < IEEE80211_NUM_BANDS; band++) {
3071                 sband = priv->hw->wiphy->bands[band];
3072                 if (!sband)
3073                         continue;
3074
3075                 for (ch = 0; ch < sband->n_channels; ch++, idx++)
3076                         if (sband->channels[ch].center_freq == freq)
3077                                 goto exit;
3078         }
3079
3080 exit:
3081         return idx;
3082 }
3083
3084 static void mwl8k_update_survey(struct mwl8k_priv *priv,
3085                                 struct ieee80211_channel *channel)
3086 {
3087         u32 cca_cnt, rx_rdy;
3088         s8 nf = 0, idx;
3089         struct survey_info *survey;
3090
3091         idx = freq_to_idx(priv, priv->acs_chan->center_freq);
3092         if (idx >= MWL8K_NUM_CHANS) {
3093                 wiphy_err(priv->hw->wiphy, "Failed to update survey\n");
3094                 return;
3095         }
3096
3097         survey = &priv->survey[idx];
3098
3099         cca_cnt = ioread32(priv->regs + NOK_CCA_CNT_REG);
3100         cca_cnt /= 1000; /* uSecs to mSecs */
3101         survey->channel_time_busy = (u64) cca_cnt;
3102
3103         rx_rdy = ioread32(priv->regs + BBU_RXRDY_CNT_REG);
3104         rx_rdy /= 1000; /* uSecs to mSecs */
3105         survey->channel_time_rx = (u64) rx_rdy;
3106
3107         priv->channel_time = jiffies - priv->channel_time;
3108         survey->channel_time = jiffies_to_msecs(priv->channel_time);
3109
3110         survey->channel = channel;
3111
3112         mwl8k_cmd_bbp_reg_access(priv->hw, 0, BBU_AVG_NOISE_VAL, &nf);
3113
3114         /* Make sure sign is negative else ACS  at hostapd fails */
3115         survey->noise = nf * -1;
3116
3117         survey->filled = SURVEY_INFO_NOISE_DBM |
3118                          SURVEY_INFO_CHANNEL_TIME |
3119                          SURVEY_INFO_CHANNEL_TIME_BUSY |
3120                          SURVEY_INFO_CHANNEL_TIME_RX;
3121 }
3122
3123 /*
3124  * CMD_SET_RF_CHANNEL.
3125  */
3126 struct mwl8k_cmd_set_rf_channel {
3127         struct mwl8k_cmd_pkt header;
3128         __le16 action;
3129         __u8 current_channel;
3130         __le32 channel_flags;
3131 } __packed;
3132
3133 static int mwl8k_cmd_set_rf_channel(struct ieee80211_hw *hw,
3134                                     struct ieee80211_conf *conf)
3135 {
3136         struct ieee80211_channel *channel = conf->chandef.chan;
3137         enum nl80211_channel_type channel_type =
3138                 cfg80211_get_chandef_type(&conf->chandef);
3139         struct mwl8k_cmd_set_rf_channel *cmd;
3140         struct mwl8k_priv *priv = hw->priv;
3141         int rc;
3142
3143         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3144         if (cmd == NULL)
3145                 return -ENOMEM;
3146
3147         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RF_CHANNEL);
3148         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3149         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3150         cmd->current_channel = channel->hw_value;
3151
3152         if (channel->band == IEEE80211_BAND_2GHZ)
3153                 cmd->channel_flags |= cpu_to_le32(0x00000001);
3154         else if (channel->band == IEEE80211_BAND_5GHZ)
3155                 cmd->channel_flags |= cpu_to_le32(0x00000004);
3156
3157         if (!priv->sw_scan_start) {
3158                 if (channel_type == NL80211_CHAN_NO_HT ||
3159                     channel_type == NL80211_CHAN_HT20)
3160                         cmd->channel_flags |= cpu_to_le32(0x00000080);
3161                 else if (channel_type == NL80211_CHAN_HT40MINUS)
3162                         cmd->channel_flags |= cpu_to_le32(0x000001900);
3163                 else if (channel_type == NL80211_CHAN_HT40PLUS)
3164                         cmd->channel_flags |= cpu_to_le32(0x000000900);
3165         } else {
3166                 cmd->channel_flags |= cpu_to_le32(0x00000080);
3167         }
3168
3169         if (priv->sw_scan_start) {
3170                 /* Store current channel stats
3171                  * before switching to newer one.
3172                  * This will be processed only for AP fw.
3173                  */
3174                 if (priv->channel_time != 0)
3175                         mwl8k_update_survey(priv, priv->acs_chan);
3176
3177                 priv->channel_time = jiffies;
3178                 priv->acs_chan =  channel;
3179         }
3180
3181         rc = mwl8k_post_cmd(hw, &cmd->header);
3182         kfree(cmd);
3183
3184         return rc;
3185 }
3186
3187 /*
3188  * CMD_SET_AID.
3189  */
3190 #define MWL8K_FRAME_PROT_DISABLED                       0x00
3191 #define MWL8K_FRAME_PROT_11G                            0x07
3192 #define MWL8K_FRAME_PROT_11N_HT_40MHZ_ONLY              0x02
3193 #define MWL8K_FRAME_PROT_11N_HT_ALL                     0x06
3194
3195 struct mwl8k_cmd_update_set_aid {
3196         struct  mwl8k_cmd_pkt header;
3197         __le16  aid;
3198
3199          /* AP's MAC address (BSSID) */
3200         __u8    bssid[ETH_ALEN];
3201         __le16  protection_mode;
3202         __u8    supp_rates[14];
3203 } __packed;
3204
3205 static void legacy_rate_mask_to_array(u8 *rates, u32 mask)
3206 {
3207         int i;
3208         int j;
3209
3210         /*
3211          * Clear nonstandard rate 4.
3212          */
3213         mask &= 0x1fef;
3214
3215         for (i = 0, j = 0; i < 13; i++) {
3216                 if (mask & (1 << i))
3217                         rates[j++] = mwl8k_rates_24[i].hw_value;
3218         }
3219 }
3220
3221 static int
3222 mwl8k_cmd_set_aid(struct ieee80211_hw *hw,
3223                   struct ieee80211_vif *vif, u32 legacy_rate_mask)
3224 {
3225         struct mwl8k_cmd_update_set_aid *cmd;
3226         u16 prot_mode;
3227         int rc;
3228
3229         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3230         if (cmd == NULL)
3231                 return -ENOMEM;
3232
3233         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_AID);
3234         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3235         cmd->aid = cpu_to_le16(vif->bss_conf.aid);
3236         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
3237
3238         if (vif->bss_conf.use_cts_prot) {
3239                 prot_mode = MWL8K_FRAME_PROT_11G;
3240         } else {
3241                 switch (vif->bss_conf.ht_operation_mode &
3242                         IEEE80211_HT_OP_MODE_PROTECTION) {
3243                 case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
3244                         prot_mode = MWL8K_FRAME_PROT_11N_HT_40MHZ_ONLY;
3245                         break;
3246                 case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
3247                         prot_mode = MWL8K_FRAME_PROT_11N_HT_ALL;
3248                         break;
3249                 default:
3250                         prot_mode = MWL8K_FRAME_PROT_DISABLED;
3251                         break;
3252                 }
3253         }
3254         cmd->protection_mode = cpu_to_le16(prot_mode);
3255
3256         legacy_rate_mask_to_array(cmd->supp_rates, legacy_rate_mask);
3257
3258         rc = mwl8k_post_cmd(hw, &cmd->header);
3259         kfree(cmd);
3260
3261         return rc;
3262 }
3263
3264 /*
3265  * CMD_SET_RATE.
3266  */
3267 struct mwl8k_cmd_set_rate {
3268         struct  mwl8k_cmd_pkt header;
3269         __u8    legacy_rates[14];
3270
3271         /* Bitmap for supported MCS codes.  */
3272         __u8    mcs_set[16];
3273         __u8    reserved[16];
3274 } __packed;
3275
3276 static int
3277 mwl8k_cmd_set_rate(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
3278                    u32 legacy_rate_mask, u8 *mcs_rates)
3279 {
3280         struct mwl8k_cmd_set_rate *cmd;
3281         int rc;
3282
3283         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3284         if (cmd == NULL)
3285                 return -ENOMEM;
3286
3287         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RATE);
3288         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3289         legacy_rate_mask_to_array(cmd->legacy_rates, legacy_rate_mask);
3290         memcpy(cmd->mcs_set, mcs_rates, 16);
3291
3292         rc = mwl8k_post_cmd(hw, &cmd->header);
3293         kfree(cmd);
3294
3295         return rc;
3296 }
3297
3298 /*
3299  * CMD_FINALIZE_JOIN.
3300  */
3301 #define MWL8K_FJ_BEACON_MAXLEN  128
3302
3303 struct mwl8k_cmd_finalize_join {
3304         struct mwl8k_cmd_pkt header;
3305         __le32 sleep_interval;  /* Number of beacon periods to sleep */
3306         __u8 beacon_data[MWL8K_FJ_BEACON_MAXLEN];
3307 } __packed;
3308
3309 static int mwl8k_cmd_finalize_join(struct ieee80211_hw *hw, void *frame,
3310                                    int framelen, int dtim)
3311 {
3312         struct mwl8k_cmd_finalize_join *cmd;
3313         struct ieee80211_mgmt *payload = frame;
3314         int payload_len;
3315         int rc;
3316
3317         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3318         if (cmd == NULL)
3319                 return -ENOMEM;
3320
3321         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_FINALIZE_JOIN);
3322         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3323         cmd->sleep_interval = cpu_to_le32(dtim ? dtim : 1);
3324
3325         payload_len = framelen - ieee80211_hdrlen(payload->frame_control);
3326         if (payload_len < 0)
3327                 payload_len = 0;
3328         else if (payload_len > MWL8K_FJ_BEACON_MAXLEN)
3329                 payload_len = MWL8K_FJ_BEACON_MAXLEN;
3330
3331         memcpy(cmd->beacon_data, &payload->u.beacon, payload_len);
3332
3333         rc = mwl8k_post_cmd(hw, &cmd->header);
3334         kfree(cmd);
3335
3336         return rc;
3337 }
3338
3339 /*
3340  * CMD_SET_RTS_THRESHOLD.
3341  */
3342 struct mwl8k_cmd_set_rts_threshold {
3343         struct mwl8k_cmd_pkt header;
3344         __le16 action;
3345         __le16 threshold;
3346 } __packed;
3347
3348 static int
3349 mwl8k_cmd_set_rts_threshold(struct ieee80211_hw *hw, int rts_thresh)
3350 {
3351         struct mwl8k_cmd_set_rts_threshold *cmd;
3352         int rc;
3353
3354         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3355         if (cmd == NULL)
3356                 return -ENOMEM;
3357
3358         cmd->header.code = cpu_to_le16(MWL8K_CMD_RTS_THRESHOLD);
3359         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3360         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3361         cmd->threshold = cpu_to_le16(rts_thresh);
3362
3363         rc = mwl8k_post_cmd(hw, &cmd->header);
3364         kfree(cmd);
3365
3366         return rc;
3367 }
3368
3369 /*
3370  * CMD_SET_SLOT.
3371  */
3372 struct mwl8k_cmd_set_slot {
3373         struct mwl8k_cmd_pkt header;
3374         __le16 action;
3375         __u8 short_slot;
3376 } __packed;
3377
3378 static int mwl8k_cmd_set_slot(struct ieee80211_hw *hw, bool short_slot_time)
3379 {
3380         struct mwl8k_cmd_set_slot *cmd;
3381         int rc;
3382
3383         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3384         if (cmd == NULL)
3385                 return -ENOMEM;
3386
3387         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_SLOT);
3388         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3389         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3390         cmd->short_slot = short_slot_time;
3391
3392         rc = mwl8k_post_cmd(hw, &cmd->header);
3393         kfree(cmd);
3394
3395         return rc;
3396 }
3397
3398 /*
3399  * CMD_SET_EDCA_PARAMS.
3400  */
3401 struct mwl8k_cmd_set_edca_params {
3402         struct mwl8k_cmd_pkt header;
3403
3404         /* See MWL8K_SET_EDCA_XXX below */
3405         __le16 action;
3406
3407         /* TX opportunity in units of 32 us */
3408         __le16 txop;
3409
3410         union {
3411                 struct {
3412                         /* Log exponent of max contention period: 0...15 */
3413                         __le32 log_cw_max;
3414
3415                         /* Log exponent of min contention period: 0...15 */
3416                         __le32 log_cw_min;
3417
3418                         /* Adaptive interframe spacing in units of 32us */
3419                         __u8 aifs;
3420
3421                         /* TX queue to configure */
3422                         __u8 txq;
3423                 } ap;
3424                 struct {
3425                         /* Log exponent of max contention period: 0...15 */
3426                         __u8 log_cw_max;
3427
3428                         /* Log exponent of min contention period: 0...15 */
3429                         __u8 log_cw_min;
3430
3431                         /* Adaptive interframe spacing in units of 32us */
3432                         __u8 aifs;
3433
3434                         /* TX queue to configure */
3435                         __u8 txq;
3436                 } sta;
3437         };
3438 } __packed;
3439
3440 #define MWL8K_SET_EDCA_CW       0x01
3441 #define MWL8K_SET_EDCA_TXOP     0x02
3442 #define MWL8K_SET_EDCA_AIFS     0x04
3443
3444 #define MWL8K_SET_EDCA_ALL      (MWL8K_SET_EDCA_CW | \
3445                                  MWL8K_SET_EDCA_TXOP | \
3446                                  MWL8K_SET_EDCA_AIFS)
3447
3448 static int
3449 mwl8k_cmd_set_edca_params(struct ieee80211_hw *hw, __u8 qnum,
3450                           __u16 cw_min, __u16 cw_max,
3451                           __u8 aifs, __u16 txop)
3452 {
3453         struct mwl8k_priv *priv = hw->priv;
3454         struct mwl8k_cmd_set_edca_params *cmd;
3455         int rc;
3456
3457         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3458         if (cmd == NULL)
3459                 return -ENOMEM;
3460
3461         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_EDCA_PARAMS);
3462         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3463         cmd->action = cpu_to_le16(MWL8K_SET_EDCA_ALL);
3464         cmd->txop = cpu_to_le16(txop);
3465         if (priv->ap_fw) {
3466                 cmd->ap.log_cw_max = cpu_to_le32(ilog2(cw_max + 1));
3467                 cmd->ap.log_cw_min = cpu_to_le32(ilog2(cw_min + 1));
3468                 cmd->ap.aifs = aifs;
3469                 cmd->ap.txq = qnum;
3470         } else {
3471                 cmd->sta.log_cw_max = (u8)ilog2(cw_max + 1);
3472                 cmd->sta.log_cw_min = (u8)ilog2(cw_min + 1);
3473                 cmd->sta.aifs = aifs;
3474                 cmd->sta.txq = qnum;
3475         }
3476
3477         rc = mwl8k_post_cmd(hw, &cmd->header);
3478         kfree(cmd);
3479
3480         return rc;
3481 }
3482
3483 /*
3484  * CMD_SET_WMM_MODE.
3485  */
3486 struct mwl8k_cmd_set_wmm_mode {
3487         struct mwl8k_cmd_pkt header;
3488         __le16 action;
3489 } __packed;
3490
3491 static int mwl8k_cmd_set_wmm_mode(struct ieee80211_hw *hw, bool enable)
3492 {
3493         struct mwl8k_priv *priv = hw->priv;
3494         struct mwl8k_cmd_set_wmm_mode *cmd;
3495         int rc;
3496
3497         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3498         if (cmd == NULL)
3499                 return -ENOMEM;
3500
3501         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_WMM_MODE);
3502         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3503         cmd->action = cpu_to_le16(!!enable);
3504
3505         rc = mwl8k_post_cmd(hw, &cmd->header);
3506         kfree(cmd);
3507
3508         if (!rc)
3509                 priv->wmm_enabled = enable;
3510
3511         return rc;
3512 }
3513
3514 /*
3515  * CMD_MIMO_CONFIG.
3516  */
3517 struct mwl8k_cmd_mimo_config {
3518         struct mwl8k_cmd_pkt header;
3519         __le32 action;
3520         __u8 rx_antenna_map;
3521         __u8 tx_antenna_map;
3522 } __packed;
3523
3524 static int mwl8k_cmd_mimo_config(struct ieee80211_hw *hw, __u8 rx, __u8 tx)
3525 {
3526         struct mwl8k_cmd_mimo_config *cmd;
3527         int rc;
3528
3529         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3530         if (cmd == NULL)
3531                 return -ENOMEM;
3532
3533         cmd->header.code = cpu_to_le16(MWL8K_CMD_MIMO_CONFIG);
3534         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3535         cmd->action = cpu_to_le32((u32)MWL8K_CMD_SET);
3536         cmd->rx_antenna_map = rx;
3537         cmd->tx_antenna_map = tx;
3538
3539         rc = mwl8k_post_cmd(hw, &cmd->header);
3540         kfree(cmd);
3541
3542         return rc;
3543 }
3544
3545 /*
3546  * CMD_USE_FIXED_RATE (STA version).
3547  */
3548 struct mwl8k_cmd_use_fixed_rate_sta {
3549         struct mwl8k_cmd_pkt header;
3550         __le32 action;
3551         __le32 allow_rate_drop;
3552         __le32 num_rates;
3553         struct {
3554                 __le32 is_ht_rate;
3555                 __le32 enable_retry;
3556                 __le32 rate;
3557                 __le32 retry_count;
3558         } rate_entry[8];
3559         __le32 rate_type;
3560         __le32 reserved1;
3561         __le32 reserved2;
3562 } __packed;
3563
3564 #define MWL8K_USE_AUTO_RATE     0x0002
3565 #define MWL8K_UCAST_RATE        0
3566
3567 static int mwl8k_cmd_use_fixed_rate_sta(struct ieee80211_hw *hw)
3568 {
3569         struct mwl8k_cmd_use_fixed_rate_sta *cmd;
3570         int rc;
3571
3572         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3573         if (cmd == NULL)
3574                 return -ENOMEM;
3575
3576         cmd->header.code = cpu_to_le16(MWL8K_CMD_USE_FIXED_RATE);
3577         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3578         cmd->action = cpu_to_le32(MWL8K_USE_AUTO_RATE);
3579         cmd->rate_type = cpu_to_le32(MWL8K_UCAST_RATE);
3580
3581         rc = mwl8k_post_cmd(hw, &cmd->header);
3582         kfree(cmd);
3583
3584         return rc;
3585 }
3586
3587 /*
3588  * CMD_USE_FIXED_RATE (AP version).
3589  */
3590 struct mwl8k_cmd_use_fixed_rate_ap {
3591         struct mwl8k_cmd_pkt header;
3592         __le32 action;
3593         __le32 allow_rate_drop;
3594         __le32 num_rates;
3595         struct mwl8k_rate_entry_ap {
3596                 __le32 is_ht_rate;
3597                 __le32 enable_retry;
3598                 __le32 rate;
3599                 __le32 retry_count;
3600         } rate_entry[4];
3601         u8 multicast_rate;
3602         u8 multicast_rate_type;
3603         u8 management_rate;
3604 } __packed;
3605
3606 static int
3607 mwl8k_cmd_use_fixed_rate_ap(struct ieee80211_hw *hw, int mcast, int mgmt)
3608 {
3609         struct mwl8k_cmd_use_fixed_rate_ap *cmd;
3610         int rc;
3611
3612         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3613         if (cmd == NULL)
3614                 return -ENOMEM;
3615
3616         cmd->header.code = cpu_to_le16(MWL8K_CMD_USE_FIXED_RATE);
3617         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3618         cmd->action = cpu_to_le32(MWL8K_USE_AUTO_RATE);
3619         cmd->multicast_rate = mcast;
3620         cmd->management_rate = mgmt;
3621
3622         rc = mwl8k_post_cmd(hw, &cmd->header);
3623         kfree(cmd);
3624
3625         return rc;
3626 }
3627
3628 /*
3629  * CMD_ENABLE_SNIFFER.
3630  */
3631 struct mwl8k_cmd_enable_sniffer {
3632         struct mwl8k_cmd_pkt header;
3633         __le32 action;
3634 } __packed;
3635
3636 static int mwl8k_cmd_enable_sniffer(struct ieee80211_hw *hw, bool enable)
3637 {
3638         struct mwl8k_cmd_enable_sniffer *cmd;
3639         int rc;
3640
3641         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3642         if (cmd == NULL)
3643                 return -ENOMEM;
3644
3645         cmd->header.code = cpu_to_le16(MWL8K_CMD_ENABLE_SNIFFER);
3646         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3647         cmd->action = cpu_to_le32(!!enable);
3648
3649         rc = mwl8k_post_cmd(hw, &cmd->header);
3650         kfree(cmd);
3651
3652         return rc;
3653 }
3654
3655 struct mwl8k_cmd_update_mac_addr {
3656         struct mwl8k_cmd_pkt header;
3657         union {
3658                 struct {
3659                         __le16 mac_type;
3660                         __u8 mac_addr[ETH_ALEN];
3661                 } mbss;
3662                 __u8 mac_addr[ETH_ALEN];
3663         };
3664 } __packed;
3665
3666 #define MWL8K_MAC_TYPE_PRIMARY_CLIENT           0
3667 #define MWL8K_MAC_TYPE_SECONDARY_CLIENT         1
3668 #define MWL8K_MAC_TYPE_PRIMARY_AP               2
3669 #define MWL8K_MAC_TYPE_SECONDARY_AP             3
3670
3671 static int mwl8k_cmd_update_mac_addr(struct ieee80211_hw *hw,
3672                                   struct ieee80211_vif *vif, u8 *mac, bool set)
3673 {
3674         struct mwl8k_priv *priv = hw->priv;
3675         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
3676         struct mwl8k_cmd_update_mac_addr *cmd;
3677         int mac_type;
3678         int rc;
3679
3680         mac_type = MWL8K_MAC_TYPE_PRIMARY_AP;
3681         if (vif != NULL && vif->type == NL80211_IFTYPE_STATION) {
3682                 if (mwl8k_vif->macid + 1 == ffs(priv->sta_macids_supported))
3683                         if (priv->ap_fw)
3684                                 mac_type = MWL8K_MAC_TYPE_SECONDARY_CLIENT;
3685                         else
3686                                 mac_type = MWL8K_MAC_TYPE_PRIMARY_CLIENT;
3687                 else
3688                         mac_type = MWL8K_MAC_TYPE_SECONDARY_CLIENT;
3689         } else if (vif != NULL && vif->type == NL80211_IFTYPE_AP) {
3690                 if (mwl8k_vif->macid + 1 == ffs(priv->ap_macids_supported))
3691                         mac_type = MWL8K_MAC_TYPE_PRIMARY_AP;
3692                 else
3693                         mac_type = MWL8K_MAC_TYPE_SECONDARY_AP;
3694         }
3695
3696         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3697         if (cmd == NULL)
3698                 return -ENOMEM;
3699
3700         if (set)
3701                 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_MAC_ADDR);
3702         else
3703                 cmd->header.code = cpu_to_le16(MWL8K_CMD_DEL_MAC_ADDR);
3704
3705         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3706         if (priv->ap_fw) {
3707                 cmd->mbss.mac_type = cpu_to_le16(mac_type);
3708                 memcpy(cmd->mbss.mac_addr, mac, ETH_ALEN);
3709         } else {
3710                 memcpy(cmd->mac_addr, mac, ETH_ALEN);
3711         }
3712
3713         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3714         kfree(cmd);
3715
3716         return rc;
3717 }
3718
3719 /*
3720  * MWL8K_CMD_SET_MAC_ADDR.
3721  */
3722 static inline int mwl8k_cmd_set_mac_addr(struct ieee80211_hw *hw,
3723                                   struct ieee80211_vif *vif, u8 *mac)
3724 {
3725         return mwl8k_cmd_update_mac_addr(hw, vif, mac, true);
3726 }
3727
3728 /*
3729  * MWL8K_CMD_DEL_MAC_ADDR.
3730  */
3731 static inline int mwl8k_cmd_del_mac_addr(struct ieee80211_hw *hw,
3732                                   struct ieee80211_vif *vif, u8 *mac)
3733 {
3734         return mwl8k_cmd_update_mac_addr(hw, vif, mac, false);
3735 }
3736
3737 /*
3738  * CMD_SET_RATEADAPT_MODE.
3739  */
3740 struct mwl8k_cmd_set_rate_adapt_mode {
3741         struct mwl8k_cmd_pkt header;
3742         __le16 action;
3743         __le16 mode;
3744 } __packed;
3745
3746 static int mwl8k_cmd_set_rateadapt_mode(struct ieee80211_hw *hw, __u16 mode)
3747 {
3748         struct mwl8k_cmd_set_rate_adapt_mode *cmd;
3749         int rc;
3750
3751         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3752         if (cmd == NULL)
3753                 return -ENOMEM;
3754
3755         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RATEADAPT_MODE);
3756         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3757         cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3758         cmd->mode = cpu_to_le16(mode);
3759
3760         rc = mwl8k_post_cmd(hw, &cmd->header);
3761         kfree(cmd);
3762
3763         return rc;
3764 }
3765
3766 /*
3767  * CMD_GET_WATCHDOG_BITMAP.
3768  */
3769 struct mwl8k_cmd_get_watchdog_bitmap {
3770         struct mwl8k_cmd_pkt header;
3771         u8      bitmap;
3772 } __packed;
3773
3774 static int mwl8k_cmd_get_watchdog_bitmap(struct ieee80211_hw *hw, u8 *bitmap)
3775 {
3776         struct mwl8k_cmd_get_watchdog_bitmap *cmd;
3777         int rc;
3778
3779         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3780         if (cmd == NULL)
3781                 return -ENOMEM;
3782
3783         cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_WATCHDOG_BITMAP);
3784         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3785
3786         rc = mwl8k_post_cmd(hw, &cmd->header);
3787         if (!rc)
3788                 *bitmap = cmd->bitmap;
3789
3790         kfree(cmd);
3791
3792         return rc;
3793 }
3794
3795 #define MWL8K_WMM_QUEUE_NUMBER  3
3796
3797 static void mwl8k_destroy_ba(struct ieee80211_hw *hw,
3798                              u8 idx);
3799
3800 static void mwl8k_watchdog_ba_events(struct work_struct *work)
3801 {
3802         int rc;
3803         u8 bitmap = 0, stream_index;
3804         struct mwl8k_ampdu_stream *streams;
3805         struct mwl8k_priv *priv =
3806                 container_of(work, struct mwl8k_priv, watchdog_ba_handle);
3807         struct ieee80211_hw *hw = priv->hw;
3808         int i;
3809         u32 status = 0;
3810
3811         mwl8k_fw_lock(hw);
3812
3813         rc = mwl8k_cmd_get_watchdog_bitmap(priv->hw, &bitmap);
3814         if (rc)
3815                 goto done;
3816
3817         spin_lock(&priv->stream_lock);
3818
3819         /* the bitmap is the hw queue number.  Map it to the ampdu queue. */
3820         for (i = 0; i < TOTAL_HW_TX_QUEUES; i++) {
3821                 if (bitmap & (1 << i)) {
3822                         stream_index = (i + MWL8K_WMM_QUEUE_NUMBER) %
3823                                        TOTAL_HW_TX_QUEUES;
3824                         streams = &priv->ampdu[stream_index];
3825                         if (streams->state == AMPDU_STREAM_ACTIVE) {
3826                                 ieee80211_stop_tx_ba_session(streams->sta,
3827                                                              streams->tid);
3828                                 spin_unlock(&priv->stream_lock);
3829                                 mwl8k_destroy_ba(hw, stream_index);
3830                                 spin_lock(&priv->stream_lock);
3831                         }
3832                 }
3833         }
3834
3835         spin_unlock(&priv->stream_lock);
3836 done:
3837         atomic_dec(&priv->watchdog_event_pending);
3838         status = ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
3839         iowrite32((status | MWL8K_A2H_INT_BA_WATCHDOG),
3840                   priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
3841         mwl8k_fw_unlock(hw);
3842         return;
3843 }
3844
3845
3846 /*
3847  * CMD_BSS_START.
3848  */
3849 struct mwl8k_cmd_bss_start {
3850         struct mwl8k_cmd_pkt header;
3851         __le32 enable;
3852 } __packed;
3853
3854 static int mwl8k_cmd_bss_start(struct ieee80211_hw *hw,
3855                                struct ieee80211_vif *vif, int enable)
3856 {
3857         struct mwl8k_cmd_bss_start *cmd;
3858         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
3859         struct mwl8k_priv *priv = hw->priv;
3860         int rc;
3861
3862         if (enable && (priv->running_bsses & (1 << mwl8k_vif->macid)))
3863                 return 0;
3864
3865         if (!enable && !(priv->running_bsses & (1 << mwl8k_vif->macid)))
3866                 return 0;
3867
3868         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3869         if (cmd == NULL)
3870                 return -ENOMEM;
3871
3872         cmd->header.code = cpu_to_le16(MWL8K_CMD_BSS_START);
3873         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3874         cmd->enable = cpu_to_le32(enable);
3875
3876         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3877         kfree(cmd);
3878
3879         if (!rc) {
3880                 if (enable)
3881                         priv->running_bsses |= (1 << mwl8k_vif->macid);
3882                 else
3883                         priv->running_bsses &= ~(1 << mwl8k_vif->macid);
3884         }
3885         return rc;
3886 }
3887
3888 static void mwl8k_enable_bsses(struct ieee80211_hw *hw, bool enable, u32 bitmap)
3889 {
3890         struct mwl8k_priv *priv = hw->priv;
3891         struct mwl8k_vif *mwl8k_vif, *tmp_vif;
3892         struct ieee80211_vif *vif;
3893
3894         list_for_each_entry_safe(mwl8k_vif, tmp_vif, &priv->vif_list, list) {
3895                 vif = mwl8k_vif->vif;
3896
3897                 if (!(bitmap & (1 << mwl8k_vif->macid)))
3898                         continue;
3899
3900                 if (vif->type == NL80211_IFTYPE_AP)
3901                         mwl8k_cmd_bss_start(hw, vif, enable);
3902         }
3903 }
3904 /*
3905  * CMD_BASTREAM.
3906  */
3907
3908 /*
3909  * UPSTREAM is tx direction
3910  */
3911 #define BASTREAM_FLAG_DIRECTION_UPSTREAM        0x00
3912 #define BASTREAM_FLAG_IMMEDIATE_TYPE            0x01
3913
3914 enum ba_stream_action_type {
3915         MWL8K_BA_CREATE,
3916         MWL8K_BA_UPDATE,
3917         MWL8K_BA_DESTROY,
3918         MWL8K_BA_FLUSH,
3919         MWL8K_BA_CHECK,
3920 };
3921
3922
3923 struct mwl8k_create_ba_stream {
3924         __le32  flags;
3925         __le32  idle_thrs;
3926         __le32  bar_thrs;
3927         __le32  window_size;
3928         u8      peer_mac_addr[6];
3929         u8      dialog_token;
3930         u8      tid;
3931         u8      queue_id;
3932         u8      param_info;
3933         __le32  ba_context;
3934         u8      reset_seq_no_flag;
3935         __le16  curr_seq_no;
3936         u8      sta_src_mac_addr[6];
3937 } __packed;
3938
3939 struct mwl8k_destroy_ba_stream {
3940         __le32  flags;
3941         __le32  ba_context;
3942 } __packed;
3943
3944 struct mwl8k_cmd_bastream {
3945         struct mwl8k_cmd_pkt    header;
3946         __le32  action;
3947         union {
3948                 struct mwl8k_create_ba_stream   create_params;
3949                 struct mwl8k_destroy_ba_stream  destroy_params;
3950         };
3951 } __packed;
3952
3953 static int
3954 mwl8k_check_ba(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream,
3955                struct ieee80211_vif *vif)
3956 {
3957         struct mwl8k_cmd_bastream *cmd;
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_BASTREAM);
3965         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3966
3967         cmd->action = cpu_to_le32(MWL8K_BA_CHECK);
3968
3969         cmd->create_params.queue_id = stream->idx;
3970         memcpy(&cmd->create_params.peer_mac_addr[0], stream->sta->addr,
3971                ETH_ALEN);
3972         cmd->create_params.tid = stream->tid;
3973
3974         cmd->create_params.flags =
3975                 cpu_to_le32(BASTREAM_FLAG_IMMEDIATE_TYPE) |
3976                 cpu_to_le32(BASTREAM_FLAG_DIRECTION_UPSTREAM);
3977
3978         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3979
3980         kfree(cmd);
3981
3982         return rc;
3983 }
3984
3985 static int
3986 mwl8k_create_ba(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream,
3987                 u8 buf_size, struct ieee80211_vif *vif)
3988 {
3989         struct mwl8k_cmd_bastream *cmd;
3990         int rc;
3991
3992         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3993         if (cmd == NULL)
3994                 return -ENOMEM;
3995
3996
3997         cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
3998         cmd->header.length = cpu_to_le16(sizeof(*cmd));
3999
4000         cmd->action = cpu_to_le32(MWL8K_BA_CREATE);
4001
4002         cmd->create_params.bar_thrs = cpu_to_le32((u32)buf_size);
4003         cmd->create_params.window_size = cpu_to_le32((u32)buf_size);
4004         cmd->create_params.queue_id = stream->idx;
4005
4006         memcpy(cmd->create_params.peer_mac_addr, stream->sta->addr, ETH_ALEN);
4007         cmd->create_params.tid = stream->tid;
4008         cmd->create_params.curr_seq_no = cpu_to_le16(0);
4009         cmd->create_params.reset_seq_no_flag = 1;
4010
4011         cmd->create_params.param_info =
4012                 (stream->sta->ht_cap.ampdu_factor &
4013                  IEEE80211_HT_AMPDU_PARM_FACTOR) |
4014                 ((stream->sta->ht_cap.ampdu_density << 2) &
4015                  IEEE80211_HT_AMPDU_PARM_DENSITY);
4016
4017         cmd->create_params.flags =
4018                 cpu_to_le32(BASTREAM_FLAG_IMMEDIATE_TYPE |
4019                                         BASTREAM_FLAG_DIRECTION_UPSTREAM);
4020
4021         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4022
4023         wiphy_debug(hw->wiphy, "Created a BA stream for %pM : tid %d\n",
4024                 stream->sta->addr, stream->tid);
4025         kfree(cmd);
4026
4027         return rc;
4028 }
4029
4030 static void mwl8k_destroy_ba(struct ieee80211_hw *hw,
4031                              u8 idx)
4032 {
4033         struct mwl8k_cmd_bastream *cmd;
4034
4035         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4036         if (cmd == NULL)
4037                 return;
4038
4039         cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
4040         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4041         cmd->action = cpu_to_le32(MWL8K_BA_DESTROY);
4042
4043         cmd->destroy_params.ba_context = cpu_to_le32(idx);
4044         mwl8k_post_cmd(hw, &cmd->header);
4045
4046         wiphy_debug(hw->wiphy, "Deleted BA stream index %d\n", idx);
4047
4048         kfree(cmd);
4049 }
4050
4051 /*
4052  * CMD_SET_NEW_STN.
4053  */
4054 struct mwl8k_cmd_set_new_stn {
4055         struct mwl8k_cmd_pkt header;
4056         __le16 aid;
4057         __u8 mac_addr[6];
4058         __le16 stn_id;
4059         __le16 action;
4060         __le16 rsvd;
4061         __le32 legacy_rates;
4062         __u8 ht_rates[4];
4063         __le16 cap_info;
4064         __le16 ht_capabilities_info;
4065         __u8 mac_ht_param_info;
4066         __u8 rev;
4067         __u8 control_channel;
4068         __u8 add_channel;
4069         __le16 op_mode;
4070         __le16 stbc;
4071         __u8 add_qos_info;
4072         __u8 is_qos_sta;
4073         __le32 fw_sta_ptr;
4074 } __packed;
4075
4076 #define MWL8K_STA_ACTION_ADD            0
4077 #define MWL8K_STA_ACTION_REMOVE         2
4078
4079 static int mwl8k_cmd_set_new_stn_add(struct ieee80211_hw *hw,
4080                                      struct ieee80211_vif *vif,
4081                                      struct ieee80211_sta *sta)
4082 {
4083         struct mwl8k_cmd_set_new_stn *cmd;
4084         u32 rates;
4085         int rc;
4086
4087         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4088         if (cmd == NULL)
4089                 return -ENOMEM;
4090
4091         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
4092         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4093         cmd->aid = cpu_to_le16(sta->aid);
4094         memcpy(cmd->mac_addr, sta->addr, ETH_ALEN);
4095         cmd->stn_id = cpu_to_le16(sta->aid);
4096         cmd->action = cpu_to_le16(MWL8K_STA_ACTION_ADD);
4097         if (hw->conf.chandef.chan->band == IEEE80211_BAND_2GHZ)
4098                 rates = sta->supp_rates[IEEE80211_BAND_2GHZ];
4099         else
4100                 rates = sta->supp_rates[IEEE80211_BAND_5GHZ] << 5;
4101         cmd->legacy_rates = cpu_to_le32(rates);
4102         if (sta->ht_cap.ht_supported) {
4103                 cmd->ht_rates[0] = sta->ht_cap.mcs.rx_mask[0];
4104                 cmd->ht_rates[1] = sta->ht_cap.mcs.rx_mask[1];
4105                 cmd->ht_rates[2] = sta->ht_cap.mcs.rx_mask[2];
4106                 cmd->ht_rates[3] = sta->ht_cap.mcs.rx_mask[3];
4107                 cmd->ht_capabilities_info = cpu_to_le16(sta->ht_cap.cap);
4108                 cmd->mac_ht_param_info = (sta->ht_cap.ampdu_factor & 3) |
4109                         ((sta->ht_cap.ampdu_density & 7) << 2);
4110                 cmd->is_qos_sta = 1;
4111         }
4112
4113         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4114         kfree(cmd);
4115
4116         return rc;
4117 }
4118
4119 static int mwl8k_cmd_set_new_stn_add_self(struct ieee80211_hw *hw,
4120                                           struct ieee80211_vif *vif)
4121 {
4122         struct mwl8k_cmd_set_new_stn *cmd;
4123         int rc;
4124
4125         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4126         if (cmd == NULL)
4127                 return -ENOMEM;
4128
4129         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
4130         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4131         memcpy(cmd->mac_addr, vif->addr, ETH_ALEN);
4132
4133         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4134         kfree(cmd);
4135
4136         return rc;
4137 }
4138
4139 static int mwl8k_cmd_set_new_stn_del(struct ieee80211_hw *hw,
4140                                      struct ieee80211_vif *vif, u8 *addr)
4141 {
4142         struct mwl8k_cmd_set_new_stn *cmd;
4143         struct mwl8k_priv *priv = hw->priv;
4144         int rc, i;
4145         u8 idx;
4146
4147         spin_lock(&priv->stream_lock);
4148         /* Destroy any active ampdu streams for this sta */
4149         for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
4150                 struct mwl8k_ampdu_stream *s;
4151                 s = &priv->ampdu[i];
4152                 if (s->state != AMPDU_NO_STREAM) {
4153                         if (memcmp(s->sta->addr, addr, ETH_ALEN) == 0) {
4154                                 if (s->state == AMPDU_STREAM_ACTIVE) {
4155                                         idx = s->idx;
4156                                         spin_unlock(&priv->stream_lock);
4157                                         mwl8k_destroy_ba(hw, idx);
4158                                         spin_lock(&priv->stream_lock);
4159                                 } else if (s->state == AMPDU_STREAM_NEW) {
4160                                         mwl8k_remove_stream(hw, s);
4161                                 }
4162                         }
4163                 }
4164         }
4165
4166         spin_unlock(&priv->stream_lock);
4167
4168         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4169         if (cmd == NULL)
4170                 return -ENOMEM;
4171
4172         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
4173         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4174         memcpy(cmd->mac_addr, addr, ETH_ALEN);
4175         cmd->action = cpu_to_le16(MWL8K_STA_ACTION_REMOVE);
4176
4177         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4178         kfree(cmd);
4179
4180         return rc;
4181 }
4182
4183 /*
4184  * CMD_UPDATE_ENCRYPTION.
4185  */
4186
4187 #define MAX_ENCR_KEY_LENGTH     16
4188 #define MIC_KEY_LENGTH          8
4189
4190 struct mwl8k_cmd_update_encryption {
4191         struct mwl8k_cmd_pkt header;
4192
4193         __le32 action;
4194         __le32 reserved;
4195         __u8 mac_addr[6];
4196         __u8 encr_type;
4197
4198 } __packed;
4199
4200 struct mwl8k_cmd_set_key {
4201         struct mwl8k_cmd_pkt header;
4202
4203         __le32 action;
4204         __le32 reserved;
4205         __le16 length;
4206         __le16 key_type_id;
4207         __le32 key_info;
4208         __le32 key_id;
4209         __le16 key_len;
4210         __u8 key_material[MAX_ENCR_KEY_LENGTH];
4211         __u8 tkip_tx_mic_key[MIC_KEY_LENGTH];
4212         __u8 tkip_rx_mic_key[MIC_KEY_LENGTH];
4213         __le16 tkip_rsc_low;
4214         __le32 tkip_rsc_high;
4215         __le16 tkip_tsc_low;
4216         __le32 tkip_tsc_high;
4217         __u8 mac_addr[6];
4218 } __packed;
4219
4220 enum {
4221         MWL8K_ENCR_ENABLE,
4222         MWL8K_ENCR_SET_KEY,
4223         MWL8K_ENCR_REMOVE_KEY,
4224         MWL8K_ENCR_SET_GROUP_KEY,
4225 };
4226
4227 #define MWL8K_UPDATE_ENCRYPTION_TYPE_WEP        0
4228 #define MWL8K_UPDATE_ENCRYPTION_TYPE_DISABLE    1
4229 #define MWL8K_UPDATE_ENCRYPTION_TYPE_TKIP       4
4230 #define MWL8K_UPDATE_ENCRYPTION_TYPE_MIXED      7
4231 #define MWL8K_UPDATE_ENCRYPTION_TYPE_AES        8
4232
4233 enum {
4234         MWL8K_ALG_WEP,
4235         MWL8K_ALG_TKIP,
4236         MWL8K_ALG_CCMP,
4237 };
4238
4239 #define MWL8K_KEY_FLAG_TXGROUPKEY       0x00000004
4240 #define MWL8K_KEY_FLAG_PAIRWISE         0x00000008
4241 #define MWL8K_KEY_FLAG_TSC_VALID        0x00000040
4242 #define MWL8K_KEY_FLAG_WEP_TXKEY        0x01000000
4243 #define MWL8K_KEY_FLAG_MICKEY_VALID     0x02000000
4244
4245 static int mwl8k_cmd_update_encryption_enable(struct ieee80211_hw *hw,
4246                                               struct ieee80211_vif *vif,
4247                                               u8 *addr,
4248                                               u8 encr_type)
4249 {
4250         struct mwl8k_cmd_update_encryption *cmd;
4251         int rc;
4252
4253         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4254         if (cmd == NULL)
4255                 return -ENOMEM;
4256
4257         cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_ENCRYPTION);
4258         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4259         cmd->action = cpu_to_le32(MWL8K_ENCR_ENABLE);
4260         memcpy(cmd->mac_addr, addr, ETH_ALEN);
4261         cmd->encr_type = encr_type;
4262
4263         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4264         kfree(cmd);
4265
4266         return rc;
4267 }
4268
4269 static int mwl8k_encryption_set_cmd_info(struct mwl8k_cmd_set_key *cmd,
4270                                                 u8 *addr,
4271                                                 struct ieee80211_key_conf *key)
4272 {
4273         cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_ENCRYPTION);
4274         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4275         cmd->length = cpu_to_le16(sizeof(*cmd) -
4276                                 offsetof(struct mwl8k_cmd_set_key, length));
4277         cmd->key_id = cpu_to_le32(key->keyidx);
4278         cmd->key_len = cpu_to_le16(key->keylen);
4279         memcpy(cmd->mac_addr, addr, ETH_ALEN);
4280
4281         switch (key->cipher) {
4282         case WLAN_CIPHER_SUITE_WEP40:
4283         case WLAN_CIPHER_SUITE_WEP104:
4284                 cmd->key_type_id = cpu_to_le16(MWL8K_ALG_WEP);
4285                 if (key->keyidx == 0)
4286                         cmd->key_info = cpu_to_le32(MWL8K_KEY_FLAG_WEP_TXKEY);
4287
4288                 break;
4289         case WLAN_CIPHER_SUITE_TKIP:
4290                 cmd->key_type_id = cpu_to_le16(MWL8K_ALG_TKIP);
4291                 cmd->key_info = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
4292                         ? cpu_to_le32(MWL8K_KEY_FLAG_PAIRWISE)
4293                         : cpu_to_le32(MWL8K_KEY_FLAG_TXGROUPKEY);
4294                 cmd->key_info |= cpu_to_le32(MWL8K_KEY_FLAG_MICKEY_VALID
4295                                                 | MWL8K_KEY_FLAG_TSC_VALID);
4296                 break;
4297         case WLAN_CIPHER_SUITE_CCMP:
4298                 cmd->key_type_id = cpu_to_le16(MWL8K_ALG_CCMP);
4299                 cmd->key_info = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
4300                         ? cpu_to_le32(MWL8K_KEY_FLAG_PAIRWISE)
4301                         : cpu_to_le32(MWL8K_KEY_FLAG_TXGROUPKEY);
4302                 break;
4303         default:
4304                 return -ENOTSUPP;
4305         }
4306
4307         return 0;
4308 }
4309
4310 static int mwl8k_cmd_encryption_set_key(struct ieee80211_hw *hw,
4311                                                 struct ieee80211_vif *vif,
4312                                                 u8 *addr,
4313                                                 struct ieee80211_key_conf *key)
4314 {
4315         struct mwl8k_cmd_set_key *cmd;
4316         int rc;
4317         int keymlen;
4318         u32 action;
4319         u8 idx;
4320         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4321
4322         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4323         if (cmd == NULL)
4324                 return -ENOMEM;
4325
4326         rc = mwl8k_encryption_set_cmd_info(cmd, addr, key);
4327         if (rc < 0)
4328                 goto done;
4329
4330         idx = key->keyidx;
4331
4332         if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
4333                 action = MWL8K_ENCR_SET_KEY;
4334         else
4335                 action = MWL8K_ENCR_SET_GROUP_KEY;
4336
4337         switch (key->cipher) {
4338         case WLAN_CIPHER_SUITE_WEP40:
4339         case WLAN_CIPHER_SUITE_WEP104:
4340                 if (!mwl8k_vif->wep_key_conf[idx].enabled) {
4341                         memcpy(mwl8k_vif->wep_key_conf[idx].key, key,
4342                                                 sizeof(*key) + key->keylen);
4343                         mwl8k_vif->wep_key_conf[idx].enabled = 1;
4344                 }
4345
4346                 keymlen = key->keylen;
4347                 action = MWL8K_ENCR_SET_KEY;
4348                 break;
4349         case WLAN_CIPHER_SUITE_TKIP:
4350                 keymlen = MAX_ENCR_KEY_LENGTH + 2 * MIC_KEY_LENGTH;
4351                 break;
4352         case WLAN_CIPHER_SUITE_CCMP:
4353                 keymlen = key->keylen;
4354                 break;
4355         default:
4356                 rc = -ENOTSUPP;
4357                 goto done;
4358         }
4359
4360         memcpy(cmd->key_material, key->key, keymlen);
4361         cmd->action = cpu_to_le32(action);
4362
4363         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4364 done:
4365         kfree(cmd);
4366
4367         return rc;
4368 }
4369
4370 static int mwl8k_cmd_encryption_remove_key(struct ieee80211_hw *hw,
4371                                                 struct ieee80211_vif *vif,
4372                                                 u8 *addr,
4373                                                 struct ieee80211_key_conf *key)
4374 {
4375         struct mwl8k_cmd_set_key *cmd;
4376         int rc;
4377         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4378
4379         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4380         if (cmd == NULL)
4381                 return -ENOMEM;
4382
4383         rc = mwl8k_encryption_set_cmd_info(cmd, addr, key);
4384         if (rc < 0)
4385                 goto done;
4386
4387         if (key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
4388                         key->cipher == WLAN_CIPHER_SUITE_WEP104)
4389                 mwl8k_vif->wep_key_conf[key->keyidx].enabled = 0;
4390
4391         cmd->action = cpu_to_le32(MWL8K_ENCR_REMOVE_KEY);
4392
4393         rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4394 done:
4395         kfree(cmd);
4396
4397         return rc;
4398 }
4399
4400 static int mwl8k_set_key(struct ieee80211_hw *hw,
4401                          enum set_key_cmd cmd_param,
4402                          struct ieee80211_vif *vif,
4403                          struct ieee80211_sta *sta,
4404                          struct ieee80211_key_conf *key)
4405 {
4406         int rc = 0;
4407         u8 encr_type;
4408         u8 *addr;
4409         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4410         struct mwl8k_priv *priv = hw->priv;
4411
4412         if (vif->type == NL80211_IFTYPE_STATION && !priv->ap_fw)
4413                 return -EOPNOTSUPP;
4414
4415         if (sta == NULL)
4416                 addr = vif->addr;
4417         else
4418                 addr = sta->addr;
4419
4420         if (cmd_param == SET_KEY) {
4421                 rc = mwl8k_cmd_encryption_set_key(hw, vif, addr, key);
4422                 if (rc)
4423                         goto out;
4424
4425                 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40)
4426                                 || (key->cipher == WLAN_CIPHER_SUITE_WEP104))
4427                         encr_type = MWL8K_UPDATE_ENCRYPTION_TYPE_WEP;
4428                 else
4429                         encr_type = MWL8K_UPDATE_ENCRYPTION_TYPE_MIXED;
4430
4431                 rc = mwl8k_cmd_update_encryption_enable(hw, vif, addr,
4432                                                                 encr_type);
4433                 if (rc)
4434                         goto out;
4435
4436                 mwl8k_vif->is_hw_crypto_enabled = true;
4437
4438         } else {
4439                 rc = mwl8k_cmd_encryption_remove_key(hw, vif, addr, key);
4440
4441                 if (rc)
4442                         goto out;
4443         }
4444 out:
4445         return rc;
4446 }
4447
4448 /*
4449  * CMD_UPDATE_STADB.
4450  */
4451 struct ewc_ht_info {
4452         __le16  control1;
4453         __le16  control2;
4454         __le16  control3;
4455 } __packed;
4456
4457 struct peer_capability_info {
4458         /* Peer type - AP vs. STA.  */
4459         __u8    peer_type;
4460
4461         /* Basic 802.11 capabilities from assoc resp.  */
4462         __le16  basic_caps;
4463
4464         /* Set if peer supports 802.11n high throughput (HT).  */
4465         __u8    ht_support;
4466
4467         /* Valid if HT is supported.  */
4468         __le16  ht_caps;
4469         __u8    extended_ht_caps;
4470         struct ewc_ht_info      ewc_info;
4471
4472         /* Legacy rate table. Intersection of our rates and peer rates.  */
4473         __u8    legacy_rates[12];
4474
4475         /* HT rate table. Intersection of our rates and peer rates.  */
4476         __u8    ht_rates[16];
4477         __u8    pad[16];
4478
4479         /* If set, interoperability mode, no proprietary extensions.  */
4480         __u8    interop;
4481         __u8    pad2;
4482         __u8    station_id;
4483         __le16  amsdu_enabled;
4484 } __packed;
4485
4486 struct mwl8k_cmd_update_stadb {
4487         struct mwl8k_cmd_pkt header;
4488
4489         /* See STADB_ACTION_TYPE */
4490         __le32  action;
4491
4492         /* Peer MAC address */
4493         __u8    peer_addr[ETH_ALEN];
4494
4495         __le32  reserved;
4496
4497         /* Peer info - valid during add/update.  */
4498         struct peer_capability_info     peer_info;
4499 } __packed;
4500
4501 #define MWL8K_STA_DB_MODIFY_ENTRY       1
4502 #define MWL8K_STA_DB_DEL_ENTRY          2
4503
4504 /* Peer Entry flags - used to define the type of the peer node */
4505 #define MWL8K_PEER_TYPE_ACCESSPOINT     2
4506
4507 static int mwl8k_cmd_update_stadb_add(struct ieee80211_hw *hw,
4508                                       struct ieee80211_vif *vif,
4509                                       struct ieee80211_sta *sta)
4510 {
4511         struct mwl8k_cmd_update_stadb *cmd;
4512         struct peer_capability_info *p;
4513         u32 rates;
4514         int rc;
4515
4516         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4517         if (cmd == NULL)
4518                 return -ENOMEM;
4519
4520         cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_STADB);
4521         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4522         cmd->action = cpu_to_le32(MWL8K_STA_DB_MODIFY_ENTRY);
4523         memcpy(cmd->peer_addr, sta->addr, ETH_ALEN);
4524
4525         p = &cmd->peer_info;
4526         p->peer_type = MWL8K_PEER_TYPE_ACCESSPOINT;
4527         p->basic_caps = cpu_to_le16(vif->bss_conf.assoc_capability);
4528         p->ht_support = sta->ht_cap.ht_supported;
4529         p->ht_caps = cpu_to_le16(sta->ht_cap.cap);
4530         p->extended_ht_caps = (sta->ht_cap.ampdu_factor & 3) |
4531                 ((sta->ht_cap.ampdu_density & 7) << 2);
4532         if (hw->conf.chandef.chan->band == IEEE80211_BAND_2GHZ)
4533                 rates = sta->supp_rates[IEEE80211_BAND_2GHZ];
4534         else
4535                 rates = sta->supp_rates[IEEE80211_BAND_5GHZ] << 5;
4536         legacy_rate_mask_to_array(p->legacy_rates, rates);
4537         memcpy(p->ht_rates, sta->ht_cap.mcs.rx_mask, 16);
4538         p->interop = 1;
4539         p->amsdu_enabled = 0;
4540
4541         rc = mwl8k_post_cmd(hw, &cmd->header);
4542         if (!rc)
4543                 rc = p->station_id;
4544         kfree(cmd);
4545
4546         return rc;
4547 }
4548
4549 static int mwl8k_cmd_update_stadb_del(struct ieee80211_hw *hw,
4550                                       struct ieee80211_vif *vif, u8 *addr)
4551 {
4552         struct mwl8k_cmd_update_stadb *cmd;
4553         int rc;
4554
4555         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4556         if (cmd == NULL)
4557                 return -ENOMEM;
4558
4559         cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_STADB);
4560         cmd->header.length = cpu_to_le16(sizeof(*cmd));
4561         cmd->action = cpu_to_le32(MWL8K_STA_DB_DEL_ENTRY);
4562         memcpy(cmd->peer_addr, addr, ETH_ALEN);
4563
4564         rc = mwl8k_post_cmd(hw, &cmd->header);
4565         kfree(cmd);
4566
4567         return rc;
4568 }
4569
4570
4571 /*
4572  * Interrupt handling.
4573  */
4574 static irqreturn_t mwl8k_interrupt(int irq, void *dev_id)
4575 {
4576         struct ieee80211_hw *hw = dev_id;
4577         struct mwl8k_priv *priv = hw->priv;
4578         u32 status;
4579
4580         status = ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4581         if (!status)
4582                 return IRQ_NONE;
4583
4584         if (status & MWL8K_A2H_INT_TX_DONE) {
4585                 status &= ~MWL8K_A2H_INT_TX_DONE;
4586                 tasklet_schedule(&priv->poll_tx_task);
4587         }
4588
4589         if (status & MWL8K_A2H_INT_RX_READY) {
4590                 status &= ~MWL8K_A2H_INT_RX_READY;
4591                 tasklet_schedule(&priv->poll_rx_task);
4592         }
4593
4594         if (status & MWL8K_A2H_INT_BA_WATCHDOG) {
4595                 iowrite32(~MWL8K_A2H_INT_BA_WATCHDOG,
4596                           priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
4597
4598                 atomic_inc(&priv->watchdog_event_pending);
4599                 status &= ~MWL8K_A2H_INT_BA_WATCHDOG;
4600                 ieee80211_queue_work(hw, &priv->watchdog_ba_handle);
4601         }
4602
4603         if (status)
4604                 iowrite32(~status, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4605
4606         if (status & MWL8K_A2H_INT_OPC_DONE) {
4607                 if (priv->hostcmd_wait != NULL)
4608                         complete(priv->hostcmd_wait);
4609         }
4610
4611         if (status & MWL8K_A2H_INT_QUEUE_EMPTY) {
4612                 if (!mutex_is_locked(&priv->fw_mutex) &&
4613                     priv->radio_on && priv->pending_tx_pkts)
4614                         mwl8k_tx_start(priv);
4615         }
4616
4617         return IRQ_HANDLED;
4618 }
4619
4620 static void mwl8k_tx_poll(unsigned long data)
4621 {
4622         struct ieee80211_hw *hw = (struct ieee80211_hw *)data;
4623         struct mwl8k_priv *priv = hw->priv;
4624         int limit;
4625         int i;
4626
4627         limit = 32;
4628
4629         spin_lock_bh(&priv->tx_lock);
4630
4631         for (i = 0; i < mwl8k_tx_queues(priv); i++)
4632                 limit -= mwl8k_txq_reclaim(hw, i, limit, 0);
4633
4634         if (!priv->pending_tx_pkts && priv->tx_wait != NULL) {
4635                 complete(priv->tx_wait);
4636                 priv->tx_wait = NULL;
4637         }
4638
4639         spin_unlock_bh(&priv->tx_lock);
4640
4641         if (limit) {
4642                 writel(~MWL8K_A2H_INT_TX_DONE,
4643                        priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4644         } else {
4645                 tasklet_schedule(&priv->poll_tx_task);
4646         }
4647 }
4648
4649 static void mwl8k_rx_poll(unsigned long data)
4650 {
4651         struct ieee80211_hw *hw = (struct ieee80211_hw *)data;
4652         struct mwl8k_priv *priv = hw->priv;
4653         int limit;
4654
4655         limit = 32;
4656         limit -= rxq_process(hw, 0, limit);
4657         limit -= rxq_refill(hw, 0, limit);
4658
4659         if (limit) {
4660                 writel(~MWL8K_A2H_INT_RX_READY,
4661                        priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4662         } else {
4663                 tasklet_schedule(&priv->poll_rx_task);
4664         }
4665 }
4666
4667
4668 /*
4669  * Core driver operations.
4670  */
4671 static void mwl8k_tx(struct ieee80211_hw *hw,
4672                      struct ieee80211_tx_control *control,
4673                      struct sk_buff *skb)
4674 {
4675         struct mwl8k_priv *priv = hw->priv;
4676         int index = skb_get_queue_mapping(skb);
4677
4678         if (!priv->radio_on) {
4679                 wiphy_debug(hw->wiphy,
4680                             "dropped TX frame since radio disabled\n");
4681                 dev_kfree_skb(skb);
4682                 return;
4683         }
4684
4685         mwl8k_txq_xmit(hw, index, control->sta, skb);
4686 }
4687
4688 static int mwl8k_start(struct ieee80211_hw *hw)
4689 {
4690         struct mwl8k_priv *priv = hw->priv;
4691         int rc;
4692
4693         rc = request_irq(priv->pdev->irq, mwl8k_interrupt,
4694                          IRQF_SHARED, MWL8K_NAME, hw);
4695         if (rc) {
4696                 priv->irq = -1;
4697                 wiphy_err(hw->wiphy, "failed to register IRQ handler\n");
4698                 return -EIO;
4699         }
4700         priv->irq = priv->pdev->irq;
4701
4702         /* Enable TX reclaim and RX tasklets.  */
4703         tasklet_enable(&priv->poll_tx_task);
4704         tasklet_enable(&priv->poll_rx_task);
4705
4706         /* Enable interrupts */
4707         iowrite32(MWL8K_A2H_EVENTS, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
4708         iowrite32(MWL8K_A2H_EVENTS,
4709                   priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
4710
4711         rc = mwl8k_fw_lock(hw);
4712         if (!rc) {
4713                 rc = mwl8k_cmd_radio_enable(hw);
4714
4715                 if (!priv->ap_fw) {
4716                         if (!rc)
4717                                 rc = mwl8k_cmd_enable_sniffer(hw, 0);
4718
4719                         if (!rc)
4720                                 rc = mwl8k_cmd_set_pre_scan(hw);
4721
4722                         if (!rc)
4723                                 rc = mwl8k_cmd_set_post_scan(hw,
4724                                                 "\x00\x00\x00\x00\x00\x00");
4725                 }
4726
4727                 if (!rc)
4728                         rc = mwl8k_cmd_set_rateadapt_mode(hw, 0);
4729
4730                 if (!rc)
4731                         rc = mwl8k_cmd_set_wmm_mode(hw, 0);
4732
4733                 mwl8k_fw_unlock(hw);
4734         }
4735
4736         if (rc) {
4737                 iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
4738                 free_irq(priv->pdev->irq, hw);
4739                 priv->irq = -1;
4740                 tasklet_disable(&priv->poll_tx_task);
4741                 tasklet_disable(&priv->poll_rx_task);
4742         } else {
4743                 ieee80211_wake_queues(hw);
4744         }
4745
4746         return rc;
4747 }
4748
4749 static void mwl8k_stop(struct ieee80211_hw *hw)
4750 {
4751         struct mwl8k_priv *priv = hw->priv;
4752         int i;
4753
4754         if (!priv->hw_restart_in_progress)
4755                 mwl8k_cmd_radio_disable(hw);
4756
4757         ieee80211_stop_queues(hw);
4758
4759         /* Disable interrupts */
4760         iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
4761         if (priv->irq != -1) {
4762                 free_irq(priv->pdev->irq, hw);
4763                 priv->irq = -1;
4764         }
4765
4766         /* Stop finalize join worker */
4767         cancel_work_sync(&priv->finalize_join_worker);
4768         cancel_work_sync(&priv->watchdog_ba_handle);
4769         if (priv->beacon_skb != NULL)
4770                 dev_kfree_skb(priv->beacon_skb);
4771
4772         /* Stop TX reclaim and RX tasklets.  */
4773         tasklet_disable(&priv->poll_tx_task);
4774         tasklet_disable(&priv->poll_rx_task);
4775
4776         /* Return all skbs to mac80211 */
4777         for (i = 0; i < mwl8k_tx_queues(priv); i++)
4778                 mwl8k_txq_reclaim(hw, i, INT_MAX, 1);
4779 }
4780
4781 static int mwl8k_reload_firmware(struct ieee80211_hw *hw, char *fw_image);
4782
4783 static int mwl8k_add_interface(struct ieee80211_hw *hw,
4784                                struct ieee80211_vif *vif)
4785 {
4786         struct mwl8k_priv *priv = hw->priv;
4787         struct mwl8k_vif *mwl8k_vif;
4788         u32 macids_supported;
4789         int macid, rc;
4790         struct mwl8k_device_info *di;
4791
4792         /*
4793          * Reject interface creation if sniffer mode is active, as
4794          * STA operation is mutually exclusive with hardware sniffer
4795          * mode.  (Sniffer mode is only used on STA firmware.)
4796          */
4797         if (priv->sniffer_enabled) {
4798                 wiphy_info(hw->wiphy,
4799                            "unable to create STA interface because sniffer mode is enabled\n");
4800                 return -EINVAL;
4801         }
4802
4803         di = priv->device_info;
4804         switch (vif->type) {
4805         case NL80211_IFTYPE_AP:
4806                 if (!priv->ap_fw && di->fw_image_ap) {
4807                         /* we must load the ap fw to meet this request */
4808                         if (!list_empty(&priv->vif_list))
4809                                 return -EBUSY;
4810                         rc = mwl8k_reload_firmware(hw, di->fw_image_ap);
4811                         if (rc)
4812                                 return rc;
4813                 }
4814                 macids_supported = priv->ap_macids_supported;
4815                 break;
4816         case NL80211_IFTYPE_STATION:
4817                 if (priv->ap_fw && di->fw_image_sta) {
4818                         if (!list_empty(&priv->vif_list)) {
4819                                 wiphy_warn(hw->wiphy, "AP interface is running.\n"
4820                                            "Adding STA interface for WDS");
4821                         } else {
4822                                 /* we must load the sta fw to
4823                                  * meet this request.
4824                                  */
4825                                 rc = mwl8k_reload_firmware(hw,
4826                                                            di->fw_image_sta);
4827                                 if (rc)
4828                                         return rc;
4829                         }
4830                 }
4831                 macids_supported = priv->sta_macids_supported;
4832                 break;
4833         default:
4834                 return -EINVAL;
4835         }
4836
4837         macid = ffs(macids_supported & ~priv->macids_used);
4838         if (!macid--)
4839                 return -EBUSY;
4840
4841         /* Setup driver private area. */
4842         mwl8k_vif = MWL8K_VIF(vif);
4843         memset(mwl8k_vif, 0, sizeof(*mwl8k_vif));
4844         mwl8k_vif->vif = vif;
4845         mwl8k_vif->macid = macid;
4846         mwl8k_vif->seqno = 0;
4847         memcpy(mwl8k_vif->bssid, vif->addr, ETH_ALEN);
4848         mwl8k_vif->is_hw_crypto_enabled = false;
4849
4850         /* Set the mac address.  */
4851         mwl8k_cmd_set_mac_addr(hw, vif, vif->addr);
4852
4853         if (vif->type == NL80211_IFTYPE_AP)
4854                 mwl8k_cmd_set_new_stn_add_self(hw, vif);
4855
4856         priv->macids_used |= 1 << mwl8k_vif->macid;
4857         list_add_tail(&mwl8k_vif->list, &priv->vif_list);
4858
4859         return 0;
4860 }
4861
4862 static void mwl8k_remove_vif(struct mwl8k_priv *priv, struct mwl8k_vif *vif)
4863 {
4864         /* Has ieee80211_restart_hw re-added the removed interfaces? */
4865         if (!priv->macids_used)
4866                 return;
4867
4868         priv->macids_used &= ~(1 << vif->macid);
4869         list_del(&vif->list);
4870 }
4871
4872 static void mwl8k_remove_interface(struct ieee80211_hw *hw,
4873                                    struct ieee80211_vif *vif)
4874 {
4875         struct mwl8k_priv *priv = hw->priv;
4876         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4877
4878         if (vif->type == NL80211_IFTYPE_AP)
4879                 mwl8k_cmd_set_new_stn_del(hw, vif, vif->addr);
4880
4881         mwl8k_cmd_del_mac_addr(hw, vif, vif->addr);
4882
4883         mwl8k_remove_vif(priv, mwl8k_vif);
4884 }
4885
4886 static void mwl8k_hw_restart_work(struct work_struct *work)
4887 {
4888         struct mwl8k_priv *priv =
4889                 container_of(work, struct mwl8k_priv, fw_reload);
4890         struct ieee80211_hw *hw = priv->hw;
4891         struct mwl8k_device_info *di;
4892         int rc;
4893
4894         /* If some command is waiting for a response, clear it */
4895         if (priv->hostcmd_wait != NULL) {
4896                 complete(priv->hostcmd_wait);
4897                 priv->hostcmd_wait = NULL;
4898         }
4899
4900         priv->hw_restart_owner = current;
4901         di = priv->device_info;
4902         mwl8k_fw_lock(hw);
4903
4904         if (priv->ap_fw)
4905                 rc = mwl8k_reload_firmware(hw, di->fw_image_ap);
4906         else
4907                 rc = mwl8k_reload_firmware(hw, di->fw_image_sta);
4908
4909         if (rc)
4910                 goto fail;
4911
4912         priv->hw_restart_owner = NULL;
4913         priv->hw_restart_in_progress = false;
4914
4915         /*
4916          * This unlock will wake up the queues and
4917          * also opens the command path for other
4918          * commands
4919          */
4920         mwl8k_fw_unlock(hw);
4921
4922         ieee80211_restart_hw(hw);
4923
4924         wiphy_err(hw->wiphy, "Firmware restarted successfully\n");
4925
4926         return;
4927 fail:
4928         mwl8k_fw_unlock(hw);
4929
4930         wiphy_err(hw->wiphy, "Firmware restart failed\n");
4931 }
4932
4933 static int mwl8k_config(struct ieee80211_hw *hw, u32 changed)
4934 {
4935         struct ieee80211_conf *conf = &hw->conf;
4936         struct mwl8k_priv *priv = hw->priv;
4937         int rc;
4938
4939         rc = mwl8k_fw_lock(hw);
4940         if (rc)
4941                 return rc;
4942
4943         if (conf->flags & IEEE80211_CONF_IDLE)
4944                 rc = mwl8k_cmd_radio_disable(hw);
4945         else
4946                 rc = mwl8k_cmd_radio_enable(hw);
4947         if (rc)
4948                 goto out;
4949
4950         if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
4951                 rc = mwl8k_cmd_set_rf_channel(hw, conf);
4952                 if (rc)
4953                         goto out;
4954         }
4955
4956         if (conf->power_level > 18)
4957                 conf->power_level = 18;
4958
4959         if (priv->ap_fw) {
4960
4961                 if (conf->flags & IEEE80211_CONF_CHANGE_POWER) {
4962                         rc = mwl8k_cmd_tx_power(hw, conf, conf->power_level);
4963                         if (rc)
4964                                 goto out;
4965                 }
4966
4967
4968         } else {
4969                 rc = mwl8k_cmd_rf_tx_power(hw, conf->power_level);
4970                 if (rc)
4971                         goto out;
4972                 rc = mwl8k_cmd_mimo_config(hw, 0x7, 0x7);
4973         }
4974
4975 out:
4976         mwl8k_fw_unlock(hw);
4977
4978         return rc;
4979 }
4980
4981 static void
4982 mwl8k_bss_info_changed_sta(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4983                            struct ieee80211_bss_conf *info, u32 changed)
4984 {
4985         struct mwl8k_priv *priv = hw->priv;
4986         u32 ap_legacy_rates = 0;
4987         u8 ap_mcs_rates[16];
4988         int rc;
4989
4990         if (mwl8k_fw_lock(hw))
4991                 return;
4992
4993         /*
4994          * No need to capture a beacon if we're no longer associated.
4995          */
4996         if ((changed & BSS_CHANGED_ASSOC) && !vif->bss_conf.assoc)
4997                 priv->capture_beacon = false;
4998
4999         /*
5000          * Get the AP's legacy and MCS rates.
5001          */
5002         if (vif->bss_conf.assoc) {
5003                 struct ieee80211_sta *ap;
5004
5005                 rcu_read_lock();
5006
5007                 ap = ieee80211_find_sta(vif, vif->bss_conf.bssid);
5008                 if (ap == NULL) {
5009                         rcu_read_unlock();
5010                         goto out;
5011                 }
5012
5013                 if (hw->conf.chandef.chan->band == IEEE80211_BAND_2GHZ) {
5014                         ap_legacy_rates = ap->supp_rates[IEEE80211_BAND_2GHZ];
5015                 } else {
5016                         ap_legacy_rates =
5017                                 ap->supp_rates[IEEE80211_BAND_5GHZ] << 5;
5018                 }
5019                 memcpy(ap_mcs_rates, ap->ht_cap.mcs.rx_mask, 16);
5020
5021                 rcu_read_unlock();
5022         }
5023
5024         if ((changed & BSS_CHANGED_ASSOC) && vif->bss_conf.assoc &&
5025             !priv->ap_fw) {
5026                 rc = mwl8k_cmd_set_rate(hw, vif, ap_legacy_rates, ap_mcs_rates);
5027                 if (rc)
5028                         goto out;
5029
5030                 rc = mwl8k_cmd_use_fixed_rate_sta(hw);
5031                 if (rc)
5032                         goto out;
5033         } else {
5034                 if ((changed & BSS_CHANGED_ASSOC) && vif->bss_conf.assoc &&
5035                     priv->ap_fw) {
5036                         int idx;
5037                         int rate;
5038
5039                         /* Use AP firmware specific rate command.
5040                          */
5041                         idx = ffs(vif->bss_conf.basic_rates);
5042                         if (idx)
5043                                 idx--;
5044
5045                         if (hw->conf.chandef.chan->band == IEEE80211_BAND_2GHZ)
5046                                 rate = mwl8k_rates_24[idx].hw_value;
5047                         else
5048                                 rate = mwl8k_rates_50[idx].hw_value;
5049
5050                         mwl8k_cmd_use_fixed_rate_ap(hw, rate, rate);
5051                 }
5052         }
5053
5054         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
5055                 rc = mwl8k_set_radio_preamble(hw,
5056                                 vif->bss_conf.use_short_preamble);
5057                 if (rc)
5058                         goto out;
5059         }
5060
5061         if ((changed & BSS_CHANGED_ERP_SLOT) && !priv->ap_fw)  {
5062                 rc = mwl8k_cmd_set_slot(hw, vif->bss_conf.use_short_slot);
5063                 if (rc)
5064                         goto out;
5065         }
5066
5067         if (vif->bss_conf.assoc && !priv->ap_fw &&
5068             (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_ERP_CTS_PROT |
5069                         BSS_CHANGED_HT))) {
5070                 rc = mwl8k_cmd_set_aid(hw, vif, ap_legacy_rates);
5071                 if (rc)
5072                         goto out;
5073         }
5074
5075         if (vif->bss_conf.assoc &&
5076             (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_BEACON_INT))) {
5077                 /*
5078                  * Finalize the join.  Tell rx handler to process
5079                  * next beacon from our BSSID.
5080                  */
5081                 memcpy(priv->capture_bssid, vif->bss_conf.bssid, ETH_ALEN);
5082                 priv->capture_beacon = true;
5083         }
5084
5085 out:
5086         mwl8k_fw_unlock(hw);
5087 }
5088
5089 static void
5090 mwl8k_bss_info_changed_ap(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5091                           struct ieee80211_bss_conf *info, u32 changed)
5092 {
5093         int rc;
5094
5095         if (mwl8k_fw_lock(hw))
5096                 return;
5097
5098         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
5099                 rc = mwl8k_set_radio_preamble(hw,
5100                                 vif->bss_conf.use_short_preamble);
5101                 if (rc)
5102                         goto out;
5103         }
5104
5105         if (changed & BSS_CHANGED_BASIC_RATES) {
5106                 int idx;
5107                 int rate;
5108
5109                 /*
5110                  * Use lowest supported basic rate for multicasts
5111                  * and management frames (such as probe responses --
5112                  * beacons will always go out at 1 Mb/s).
5113                  */
5114                 idx = ffs(vif->bss_conf.basic_rates);
5115                 if (idx)
5116                         idx--;
5117
5118                 if (hw->conf.chandef.chan->band == IEEE80211_BAND_2GHZ)
5119                         rate = mwl8k_rates_24[idx].hw_value;
5120                 else
5121                         rate = mwl8k_rates_50[idx].hw_value;
5122
5123                 mwl8k_cmd_use_fixed_rate_ap(hw, rate, rate);
5124         }
5125
5126         if (changed & (BSS_CHANGED_BEACON_INT | BSS_CHANGED_BEACON)) {
5127                 struct sk_buff *skb;
5128
5129                 skb = ieee80211_beacon_get(hw, vif);
5130                 if (skb != NULL) {
5131                         mwl8k_cmd_set_beacon(hw, vif, skb->data, skb->len);
5132                         kfree_skb(skb);
5133                 }
5134         }
5135
5136         if (changed & BSS_CHANGED_BEACON_ENABLED)
5137                 mwl8k_cmd_bss_start(hw, vif, info->enable_beacon);
5138
5139 out:
5140         mwl8k_fw_unlock(hw);
5141 }
5142
5143 static void
5144 mwl8k_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5145                        struct ieee80211_bss_conf *info, u32 changed)
5146 {
5147         if (vif->type == NL80211_IFTYPE_STATION)
5148                 mwl8k_bss_info_changed_sta(hw, vif, info, changed);
5149         if (vif->type == NL80211_IFTYPE_AP)
5150                 mwl8k_bss_info_changed_ap(hw, vif, info, changed);
5151 }
5152
5153 static u64 mwl8k_prepare_multicast(struct ieee80211_hw *hw,
5154                                    struct netdev_hw_addr_list *mc_list)
5155 {
5156         struct mwl8k_cmd_pkt *cmd;
5157
5158         /*
5159          * Synthesize and return a command packet that programs the
5160          * hardware multicast address filter.  At this point we don't
5161          * know whether FIF_ALLMULTI is being requested, but if it is,
5162          * we'll end up throwing this packet away and creating a new
5163          * one in mwl8k_configure_filter().
5164          */
5165         cmd = __mwl8k_cmd_mac_multicast_adr(hw, 0, mc_list);
5166
5167         return (unsigned long)cmd;
5168 }
5169
5170 static int
5171 mwl8k_configure_filter_sniffer(struct ieee80211_hw *hw,
5172                                unsigned int changed_flags,
5173                                unsigned int *total_flags)
5174 {
5175         struct mwl8k_priv *priv = hw->priv;
5176
5177         /*
5178          * Hardware sniffer mode is mutually exclusive with STA
5179          * operation, so refuse to enable sniffer mode if a STA
5180          * interface is active.
5181          */
5182         if (!list_empty(&priv->vif_list)) {
5183                 if (net_ratelimit())
5184                         wiphy_info(hw->wiphy,
5185                                    "not enabling sniffer mode because STA interface is active\n");
5186                 return 0;
5187         }
5188
5189         if (!priv->sniffer_enabled) {
5190                 if (mwl8k_cmd_enable_sniffer(hw, 1))
5191                         return 0;
5192                 priv->sniffer_enabled = true;
5193         }
5194
5195         *total_flags &= FIF_PROMISC_IN_BSS | FIF_ALLMULTI |
5196                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL |
5197                         FIF_OTHER_BSS;
5198
5199         return 1;
5200 }
5201
5202 static struct mwl8k_vif *mwl8k_first_vif(struct mwl8k_priv *priv)
5203 {
5204         if (!list_empty(&priv->vif_list))
5205                 return list_entry(priv->vif_list.next, struct mwl8k_vif, list);
5206
5207         return NULL;
5208 }
5209
5210 static void mwl8k_configure_filter(struct ieee80211_hw *hw,
5211                                    unsigned int changed_flags,
5212                                    unsigned int *total_flags,
5213                                    u64 multicast)
5214 {
5215         struct mwl8k_priv *priv = hw->priv;
5216         struct mwl8k_cmd_pkt *cmd = (void *)(unsigned long)multicast;
5217
5218         /*
5219          * AP firmware doesn't allow fine-grained control over
5220          * the receive filter.
5221          */
5222         if (priv->ap_fw) {
5223                 *total_flags &= FIF_ALLMULTI | FIF_BCN_PRBRESP_PROMISC;
5224                 kfree(cmd);
5225                 return;
5226         }
5227
5228         /*
5229          * Enable hardware sniffer mode if FIF_CONTROL or
5230          * FIF_OTHER_BSS is requested.
5231          */
5232         if (*total_flags & (FIF_CONTROL | FIF_OTHER_BSS) &&
5233             mwl8k_configure_filter_sniffer(hw, changed_flags, total_flags)) {
5234                 kfree(cmd);
5235                 return;
5236         }
5237
5238         /* Clear unsupported feature flags */
5239         *total_flags &= FIF_ALLMULTI | FIF_BCN_PRBRESP_PROMISC;
5240
5241         if (mwl8k_fw_lock(hw)) {
5242                 kfree(cmd);
5243                 return;
5244         }
5245
5246         if (priv->sniffer_enabled) {
5247                 mwl8k_cmd_enable_sniffer(hw, 0);
5248                 priv->sniffer_enabled = false;
5249         }
5250
5251         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
5252                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC) {
5253                         /*
5254                          * Disable the BSS filter.
5255                          */
5256                         mwl8k_cmd_set_pre_scan(hw);
5257                 } else {
5258                         struct mwl8k_vif *mwl8k_vif;
5259                         const u8 *bssid;
5260
5261                         /*
5262                          * Enable the BSS filter.
5263                          *
5264                          * If there is an active STA interface, use that
5265                          * interface's BSSID, otherwise use a dummy one
5266                          * (where the OUI part needs to be nonzero for
5267                          * the BSSID to be accepted by POST_SCAN).
5268                          */
5269                         mwl8k_vif = mwl8k_first_vif(priv);
5270                         if (mwl8k_vif != NULL)
5271                                 bssid = mwl8k_vif->vif->bss_conf.bssid;
5272                         else
5273                                 bssid = "\x01\x00\x00\x00\x00\x00";
5274
5275                         mwl8k_cmd_set_post_scan(hw, bssid);
5276                 }
5277         }
5278
5279         /*
5280          * If FIF_ALLMULTI is being requested, throw away the command
5281          * packet that ->prepare_multicast() built and replace it with
5282          * a command packet that enables reception of all multicast
5283          * packets.
5284          */
5285         if (*total_flags & FIF_ALLMULTI) {
5286                 kfree(cmd);
5287                 cmd = __mwl8k_cmd_mac_multicast_adr(hw, 1, NULL);
5288         }
5289
5290         if (cmd != NULL) {
5291                 mwl8k_post_cmd(hw, cmd);
5292                 kfree(cmd);
5293         }
5294
5295         mwl8k_fw_unlock(hw);
5296 }
5297
5298 static int mwl8k_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
5299 {
5300         return mwl8k_cmd_set_rts_threshold(hw, value);
5301 }
5302
5303 static int mwl8k_sta_remove(struct ieee80211_hw *hw,
5304                             struct ieee80211_vif *vif,
5305                             struct ieee80211_sta *sta)
5306 {
5307         struct mwl8k_priv *priv = hw->priv;
5308
5309         if (priv->ap_fw)
5310                 return mwl8k_cmd_set_new_stn_del(hw, vif, sta->addr);
5311         else
5312                 return mwl8k_cmd_update_stadb_del(hw, vif, sta->addr);
5313 }
5314
5315 static int mwl8k_sta_add(struct ieee80211_hw *hw,
5316                          struct ieee80211_vif *vif,
5317                          struct ieee80211_sta *sta)
5318 {
5319         struct mwl8k_priv *priv = hw->priv;
5320         int ret;
5321         int i;
5322         struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
5323         struct ieee80211_key_conf *key;
5324
5325         if (!priv->ap_fw) {
5326                 ret = mwl8k_cmd_update_stadb_add(hw, vif, sta);
5327                 if (ret >= 0) {
5328                         MWL8K_STA(sta)->peer_id = ret;
5329                         if (sta->ht_cap.ht_supported)
5330                                 MWL8K_STA(sta)->is_ampdu_allowed = true;
5331                         ret = 0;
5332                 }
5333
5334         } else {
5335                 ret = mwl8k_cmd_set_new_stn_add(hw, vif, sta);
5336         }
5337
5338         for (i = 0; i < NUM_WEP_KEYS; i++) {
5339                 key = IEEE80211_KEY_CONF(mwl8k_vif->wep_key_conf[i].key);
5340                 if (mwl8k_vif->wep_key_conf[i].enabled)
5341                         mwl8k_set_key(hw, SET_KEY, vif, sta, key);
5342         }
5343         return ret;
5344 }
5345
5346 static int mwl8k_conf_tx(struct ieee80211_hw *hw,
5347                          struct ieee80211_vif *vif, u16 queue,
5348                          const struct ieee80211_tx_queue_params *params)
5349 {
5350         struct mwl8k_priv *priv = hw->priv;
5351         int rc;
5352
5353         rc = mwl8k_fw_lock(hw);
5354         if (!rc) {
5355                 BUG_ON(queue > MWL8K_TX_WMM_QUEUES - 1);
5356                 memcpy(&priv->wmm_params[queue], params, sizeof(*params));
5357
5358                 if (!priv->wmm_enabled)
5359                         rc = mwl8k_cmd_set_wmm_mode(hw, 1);
5360
5361                 if (!rc) {
5362                         int q = MWL8K_TX_WMM_QUEUES - 1 - queue;
5363                         rc = mwl8k_cmd_set_edca_params(hw, q,
5364                                                        params->cw_min,
5365                                                        params->cw_max,
5366                                                        params->aifs,
5367                                                        params->txop);
5368                 }
5369
5370                 mwl8k_fw_unlock(hw);
5371         }
5372
5373         return rc;
5374 }
5375
5376 static int mwl8k_get_stats(struct ieee80211_hw *hw,
5377                            struct ieee80211_low_level_stats *stats)
5378 {
5379         return mwl8k_cmd_get_stat(hw, stats);
5380 }
5381
5382 static int mwl8k_get_survey(struct ieee80211_hw *hw, int idx,
5383                                 struct survey_info *survey)
5384 {
5385         struct mwl8k_priv *priv = hw->priv;
5386         struct ieee80211_conf *conf = &hw->conf;
5387         struct ieee80211_supported_band *sband;
5388
5389         if (priv->ap_fw) {
5390                 sband = hw->wiphy->bands[IEEE80211_BAND_2GHZ];
5391
5392                 if (sband && idx >= sband->n_channels) {
5393                         idx -= sband->n_channels;
5394                         sband = NULL;
5395                 }
5396
5397                 if (!sband)
5398                         sband = hw->wiphy->bands[IEEE80211_BAND_5GHZ];
5399
5400                 if (!sband || idx >= sband->n_channels)
5401                         return -ENOENT;
5402
5403                 memcpy(survey, &priv->survey[idx], sizeof(*survey));
5404                 survey->channel = &sband->channels[idx];
5405
5406                 return 0;
5407         }
5408
5409         if (idx != 0)
5410                 return -ENOENT;
5411
5412         survey->channel = conf->chandef.chan;
5413         survey->filled = SURVEY_INFO_NOISE_DBM;
5414         survey->noise = priv->noise;
5415
5416         return 0;
5417 }
5418
5419 #define MAX_AMPDU_ATTEMPTS 5
5420
5421 static int
5422 mwl8k_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5423                    enum ieee80211_ampdu_mlme_action action,
5424                    struct ieee80211_sta *sta, u16 tid, u16 *ssn,
5425                    u8 buf_size)
5426 {
5427
5428         int i, rc = 0;
5429         struct mwl8k_priv *priv = hw->priv;
5430         struct mwl8k_ampdu_stream *stream;
5431         u8 *addr = sta->addr, idx;
5432         struct mwl8k_sta *sta_info = MWL8K_STA(sta);
5433
5434         if (!(hw->flags & IEEE80211_HW_AMPDU_AGGREGATION))
5435                 return -ENOTSUPP;
5436
5437         spin_lock(&priv->stream_lock);
5438         stream = mwl8k_lookup_stream(hw, addr, tid);
5439
5440         switch (action) {
5441         case IEEE80211_AMPDU_RX_START:
5442         case IEEE80211_AMPDU_RX_STOP:
5443                 break;
5444         case IEEE80211_AMPDU_TX_START:
5445                 /* By the time we get here the hw queues may contain outgoing
5446                  * packets for this RA/TID that are not part of this BA
5447                  * session.  The hw will assign sequence numbers to these
5448                  * packets as they go out.  So if we query the hw for its next
5449                  * sequence number and use that for the SSN here, it may end up
5450                  * being wrong, which will lead to sequence number mismatch at
5451                  * the recipient.  To avoid this, we reset the sequence number
5452                  * to O for the first MPDU in this BA stream.
5453                  */
5454                 *ssn = 0;
5455                 if (stream == NULL) {
5456                         /* This means that somebody outside this driver called
5457                          * ieee80211_start_tx_ba_session.  This is unexpected
5458                          * because we do our own rate control.  Just warn and
5459                          * move on.
5460                          */
5461                         wiphy_warn(hw->wiphy, "Unexpected call to %s.  "
5462                                    "Proceeding anyway.\n", __func__);
5463                         stream = mwl8k_add_stream(hw, sta, tid);
5464                 }
5465                 if (stream == NULL) {
5466                         wiphy_debug(hw->wiphy, "no free AMPDU streams\n");
5467                         rc = -EBUSY;
5468                         break;
5469                 }
5470                 stream->state = AMPDU_STREAM_IN_PROGRESS;
5471
5472                 /* Release the lock before we do the time consuming stuff */
5473                 spin_unlock(&priv->stream_lock);
5474                 for (i = 0; i < MAX_AMPDU_ATTEMPTS; i++) {
5475
5476                         /* Check if link is still valid */
5477                         if (!sta_info->is_ampdu_allowed) {
5478                                 spin_lock(&priv->stream_lock);
5479                                 mwl8k_remove_stream(hw, stream);
5480                                 spin_unlock(&priv->stream_lock);
5481                                 return -EBUSY;
5482                         }
5483
5484                         rc = mwl8k_check_ba(hw, stream, vif);
5485
5486                         /* If HW restart is in progress mwl8k_post_cmd will
5487                          * return -EBUSY. Avoid retrying mwl8k_check_ba in
5488                          * such cases
5489                          */
5490                         if (!rc || rc == -EBUSY)
5491                                 break;
5492                         /*
5493                          * HW queues take time to be flushed, give them
5494                          * sufficient time
5495                          */
5496
5497                         msleep(1000);
5498                 }
5499                 spin_lock(&priv->stream_lock);
5500                 if (rc) {
5501                         wiphy_err(hw->wiphy, "Stream for tid %d busy after %d"
5502                                 " attempts\n", tid, MAX_AMPDU_ATTEMPTS);
5503                         mwl8k_remove_stream(hw, stream);
5504                         rc = -EBUSY;
5505                         break;
5506                 }
5507                 ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid);
5508                 break;
5509         case IEEE80211_AMPDU_TX_STOP_CONT:
5510         case IEEE80211_AMPDU_TX_STOP_FLUSH:
5511         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
5512                 if (stream) {
5513                         if (stream->state == AMPDU_STREAM_ACTIVE) {
5514                                 idx = stream->idx;
5515                                 spin_unlock(&priv->stream_lock);
5516                                 mwl8k_destroy_ba(hw, idx);
5517                                 spin_lock(&priv->stream_lock);
5518                         }
5519                         mwl8k_remove_stream(hw, stream);
5520                 }
5521                 ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
5522                 break;
5523         case IEEE80211_AMPDU_TX_OPERATIONAL:
5524                 BUG_ON(stream == NULL);
5525                 BUG_ON(stream->state != AMPDU_STREAM_IN_PROGRESS);
5526                 spin_unlock(&priv->stream_lock);
5527                 rc = mwl8k_create_ba(hw, stream, buf_size, vif);
5528                 spin_lock(&priv->stream_lock);
5529                 if (!rc)
5530                         stream->state = AMPDU_STREAM_ACTIVE;
5531                 else {
5532                         idx = stream->idx;
5533                         spin_unlock(&priv->stream_lock);
5534                         mwl8k_destroy_ba(hw, idx);
5535                         spin_lock(&priv->stream_lock);
5536                         wiphy_debug(hw->wiphy,
5537                                 "Failed adding stream for sta %pM tid %d\n",
5538                                 addr, tid);
5539                         mwl8k_remove_stream(hw, stream);
5540                 }
5541                 break;
5542
5543         default:
5544                 rc = -ENOTSUPP;
5545         }
5546
5547         spin_unlock(&priv->stream_lock);
5548         return rc;
5549 }
5550
5551 static void mwl8k_sw_scan_start(struct ieee80211_hw *hw,
5552                                 struct ieee80211_vif *vif,
5553                                 const u8 *mac_addr)
5554 {
5555         struct mwl8k_priv *priv = hw->priv;
5556         u8 tmp;
5557
5558         if (!priv->ap_fw)
5559                 return;
5560
5561         /* clear all stats */
5562         priv->channel_time = 0;
5563         ioread32(priv->regs + BBU_RXRDY_CNT_REG);
5564         ioread32(priv->regs + NOK_CCA_CNT_REG);
5565         mwl8k_cmd_bbp_reg_access(priv->hw, 0, BBU_AVG_NOISE_VAL, &tmp);
5566
5567         priv->sw_scan_start = true;
5568 }
5569
5570 static void mwl8k_sw_scan_complete(struct ieee80211_hw *hw,
5571                                    struct ieee80211_vif *vif)
5572 {
5573         struct mwl8k_priv *priv = hw->priv;
5574         u8 tmp;
5575
5576         if (!priv->ap_fw)
5577                 return;
5578
5579         priv->sw_scan_start = false;
5580
5581         /* clear all stats */
5582         priv->channel_time = 0;
5583         ioread32(priv->regs + BBU_RXRDY_CNT_REG);
5584         ioread32(priv->regs + NOK_CCA_CNT_REG);
5585         mwl8k_cmd_bbp_reg_access(priv->hw, 0, BBU_AVG_NOISE_VAL, &tmp);
5586 }
5587
5588 static const struct ieee80211_ops mwl8k_ops = {
5589         .tx                     = mwl8k_tx,
5590         .start                  = mwl8k_start,
5591         .stop                   = mwl8k_stop,
5592         .add_interface          = mwl8k_add_interface,
5593         .remove_interface       = mwl8k_remove_interface,
5594         .config                 = mwl8k_config,
5595         .bss_info_changed       = mwl8k_bss_info_changed,
5596         .prepare_multicast      = mwl8k_prepare_multicast,
5597         .configure_filter       = mwl8k_configure_filter,
5598         .set_key                = mwl8k_set_key,
5599         .set_rts_threshold      = mwl8k_set_rts_threshold,
5600         .sta_add                = mwl8k_sta_add,
5601         .sta_remove             = mwl8k_sta_remove,
5602         .conf_tx                = mwl8k_conf_tx,
5603         .get_stats              = mwl8k_get_stats,
5604         .get_survey             = mwl8k_get_survey,
5605         .ampdu_action           = mwl8k_ampdu_action,
5606         .sw_scan_start          = mwl8k_sw_scan_start,
5607         .sw_scan_complete       = mwl8k_sw_scan_complete,
5608 };
5609
5610 static void mwl8k_finalize_join_worker(struct work_struct *work)
5611 {
5612         struct mwl8k_priv *priv =
5613                 container_of(work, struct mwl8k_priv, finalize_join_worker);
5614         struct sk_buff *skb = priv->beacon_skb;
5615         struct ieee80211_mgmt *mgmt = (void *)skb->data;
5616         int len = skb->len - offsetof(struct ieee80211_mgmt, u.beacon.variable);
5617         const u8 *tim = cfg80211_find_ie(WLAN_EID_TIM,
5618                                          mgmt->u.beacon.variable, len);
5619         int dtim_period = 1;
5620
5621         if (tim && tim[1] >= 2)
5622                 dtim_period = tim[3];
5623
5624         mwl8k_cmd_finalize_join(priv->hw, skb->data, skb->len, dtim_period);
5625
5626         dev_kfree_skb(skb);
5627         priv->beacon_skb = NULL;
5628 }
5629
5630 enum {
5631         MWL8363 = 0,
5632         MWL8687,
5633         MWL8366,
5634         MWL8764,
5635 };
5636
5637 #define MWL8K_8366_AP_FW_API 3
5638 #define _MWL8K_8366_AP_FW(api) "mwl8k/fmimage_8366_ap-" #api ".fw"
5639 #define MWL8K_8366_AP_FW(api) _MWL8K_8366_AP_FW(api)
5640
5641 #define MWL8K_8764_AP_FW_API 1
5642 #define _MWL8K_8764_AP_FW(api) "mwl8k/fmimage_8764_ap-" #api ".fw"
5643 #define MWL8K_8764_AP_FW(api) _MWL8K_8764_AP_FW(api)
5644
5645 static struct mwl8k_device_info mwl8k_info_tbl[] = {
5646         [MWL8363] = {
5647                 .part_name      = "88w8363",
5648                 .helper_image   = "mwl8k/helper_8363.fw",
5649                 .fw_image_sta   = "mwl8k/fmimage_8363.fw",
5650         },
5651         [MWL8687] = {
5652                 .part_name      = "88w8687",
5653                 .helper_image   = "mwl8k/helper_8687.fw",
5654                 .fw_image_sta   = "mwl8k/fmimage_8687.fw",
5655         },
5656         [MWL8366] = {
5657                 .part_name      = "88w8366",
5658                 .helper_image   = "mwl8k/helper_8366.fw",
5659                 .fw_image_sta   = "mwl8k/fmimage_8366.fw",
5660                 .fw_image_ap    = MWL8K_8366_AP_FW(MWL8K_8366_AP_FW_API),
5661                 .fw_api_ap      = MWL8K_8366_AP_FW_API,
5662                 .ap_rxd_ops     = &rxd_ap_ops,
5663         },
5664         [MWL8764] = {
5665                 .part_name      = "88w8764",
5666                 .fw_image_ap    = MWL8K_8764_AP_FW(MWL8K_8764_AP_FW_API),
5667                 .fw_api_ap      = MWL8K_8764_AP_FW_API,
5668                 .ap_rxd_ops     = &rxd_ap_ops,
5669         },
5670 };
5671
5672 MODULE_FIRMWARE("mwl8k/helper_8363.fw");
5673 MODULE_FIRMWARE("mwl8k/fmimage_8363.fw");
5674 MODULE_FIRMWARE("mwl8k/helper_8687.fw");
5675 MODULE_FIRMWARE("mwl8k/fmimage_8687.fw");
5676 MODULE_FIRMWARE("mwl8k/helper_8366.fw");
5677 MODULE_FIRMWARE("mwl8k/fmimage_8366.fw");
5678 MODULE_FIRMWARE(MWL8K_8366_AP_FW(MWL8K_8366_AP_FW_API));
5679
5680 static const struct pci_device_id mwl8k_pci_id_table[] = {
5681         { PCI_VDEVICE(MARVELL, 0x2a0a), .driver_data = MWL8363, },
5682         { PCI_VDEVICE(MARVELL, 0x2a0c), .driver_data = MWL8363, },
5683         { PCI_VDEVICE(MARVELL, 0x2a24), .driver_data = MWL8363, },
5684         { PCI_VDEVICE(MARVELL, 0x2a2b), .driver_data = MWL8687, },
5685         { PCI_VDEVICE(MARVELL, 0x2a30), .driver_data = MWL8687, },
5686         { PCI_VDEVICE(MARVELL, 0x2a40), .driver_data = MWL8366, },
5687         { PCI_VDEVICE(MARVELL, 0x2a41), .driver_data = MWL8366, },
5688         { PCI_VDEVICE(MARVELL, 0x2a42), .driver_data = MWL8366, },
5689         { PCI_VDEVICE(MARVELL, 0x2a43), .driver_data = MWL8366, },
5690         { PCI_VDEVICE(MARVELL, 0x2b36), .driver_data = MWL8764, },
5691         { },
5692 };
5693 MODULE_DEVICE_TABLE(pci, mwl8k_pci_id_table);
5694
5695 static int mwl8k_request_alt_fw(struct mwl8k_priv *priv)
5696 {
5697         int rc;
5698         printk(KERN_ERR "%s: Error requesting preferred fw %s.\n"
5699                "Trying alternative firmware %s\n", pci_name(priv->pdev),
5700                priv->fw_pref, priv->fw_alt);
5701         rc = mwl8k_request_fw(priv, priv->fw_alt, &priv->fw_ucode, true);
5702         if (rc) {
5703                 printk(KERN_ERR "%s: Error requesting alt fw %s\n",
5704                        pci_name(priv->pdev), priv->fw_alt);
5705                 return rc;
5706         }
5707         return 0;
5708 }
5709
5710 static int mwl8k_firmware_load_success(struct mwl8k_priv *priv);
5711 static void mwl8k_fw_state_machine(const struct firmware *fw, void *context)
5712 {
5713         struct mwl8k_priv *priv = context;
5714         struct mwl8k_device_info *di = priv->device_info;
5715         int rc;
5716
5717         switch (priv->fw_state) {
5718         case FW_STATE_INIT:
5719                 if (!fw) {
5720                         printk(KERN_ERR "%s: Error requesting helper fw %s\n",
5721                                pci_name(priv->pdev), di->helper_image);
5722                         goto fail;
5723                 }
5724                 priv->fw_helper = fw;
5725                 rc = mwl8k_request_fw(priv, priv->fw_pref, &priv->fw_ucode,
5726                                       true);
5727                 if (rc && priv->fw_alt) {
5728                         rc = mwl8k_request_alt_fw(priv);
5729                         if (rc)
5730                                 goto fail;
5731                         priv->fw_state = FW_STATE_LOADING_ALT;
5732                 } else if (rc)
5733                         goto fail;
5734                 else
5735                         priv->fw_state = FW_STATE_LOADING_PREF;
5736                 break;
5737
5738         case FW_STATE_LOADING_PREF:
5739                 if (!fw) {
5740                         if (priv->fw_alt) {
5741                                 rc = mwl8k_request_alt_fw(priv);
5742                                 if (rc)
5743                                         goto fail;
5744                                 priv->fw_state = FW_STATE_LOADING_ALT;
5745                         } else
5746                                 goto fail;
5747                 } else {
5748                         priv->fw_ucode = fw;
5749                         rc = mwl8k_firmware_load_success(priv);
5750                         if (rc)
5751                                 goto fail;
5752                         else
5753                                 complete(&priv->firmware_loading_complete);
5754                 }
5755                 break;
5756
5757         case FW_STATE_LOADING_ALT:
5758                 if (!fw) {
5759                         printk(KERN_ERR "%s: Error requesting alt fw %s\n",
5760                                pci_name(priv->pdev), di->helper_image);
5761                         goto fail;
5762                 }
5763                 priv->fw_ucode = fw;
5764                 rc = mwl8k_firmware_load_success(priv);
5765                 if (rc)
5766                         goto fail;
5767                 else
5768                         complete(&priv->firmware_loading_complete);
5769                 break;
5770
5771         default:
5772                 printk(KERN_ERR "%s: Unexpected firmware loading state: %d\n",
5773                        MWL8K_NAME, priv->fw_state);
5774                 BUG_ON(1);
5775         }
5776
5777         return;
5778
5779 fail:
5780         priv->fw_state = FW_STATE_ERROR;
5781         complete(&priv->firmware_loading_complete);
5782         device_release_driver(&priv->pdev->dev);
5783         mwl8k_release_firmware(priv);
5784 }
5785
5786 #define MAX_RESTART_ATTEMPTS 1
5787 static int mwl8k_init_firmware(struct ieee80211_hw *hw, char *fw_image,
5788                                bool nowait)
5789 {
5790         struct mwl8k_priv *priv = hw->priv;
5791         int rc;
5792         int count = MAX_RESTART_ATTEMPTS;
5793
5794 retry:
5795         /* Reset firmware and hardware */
5796         mwl8k_hw_reset(priv);
5797
5798         /* Ask userland hotplug daemon for the device firmware */
5799         rc = mwl8k_request_firmware(priv, fw_image, nowait);
5800         if (rc) {
5801                 wiphy_err(hw->wiphy, "Firmware files not found\n");
5802                 return rc;
5803         }
5804
5805         if (nowait)
5806                 return rc;
5807
5808         /* Load firmware into hardware */
5809         rc = mwl8k_load_firmware(hw);
5810         if (rc)
5811                 wiphy_err(hw->wiphy, "Cannot start firmware\n");
5812
5813         /* Reclaim memory once firmware is successfully loaded */
5814         mwl8k_release_firmware(priv);
5815
5816         if (rc && count) {
5817                 /* FW did not start successfully;
5818                  * lets try one more time
5819                  */
5820                 count--;
5821                 wiphy_err(hw->wiphy, "Trying to reload the firmware again\n");
5822                 msleep(20);
5823                 goto retry;
5824         }
5825
5826         return rc;
5827 }
5828
5829 static int mwl8k_init_txqs(struct ieee80211_hw *hw)
5830 {
5831         struct mwl8k_priv *priv = hw->priv;
5832         int rc = 0;
5833         int i;
5834
5835         for (i = 0; i < mwl8k_tx_queues(priv); i++) {
5836                 rc = mwl8k_txq_init(hw, i);
5837                 if (rc)
5838                         break;
5839                 if (priv->ap_fw)
5840                         iowrite32(priv->txq[i].txd_dma,
5841                                   priv->sram + priv->txq_offset[i]);
5842         }
5843         return rc;
5844 }
5845
5846 /* initialize hw after successfully loading a firmware image */
5847 static int mwl8k_probe_hw(struct ieee80211_hw *hw)
5848 {
5849         struct mwl8k_priv *priv = hw->priv;
5850         int rc = 0;
5851         int i;
5852
5853         if (priv->ap_fw) {
5854                 priv->rxd_ops = priv->device_info->ap_rxd_ops;
5855                 if (priv->rxd_ops == NULL) {
5856                         wiphy_err(hw->wiphy,
5857                                   "Driver does not have AP firmware image support for this hardware\n");
5858                         rc = -ENOENT;
5859                         goto err_stop_firmware;
5860                 }
5861         } else {
5862                 priv->rxd_ops = &rxd_sta_ops;
5863         }
5864
5865         priv->sniffer_enabled = false;
5866         priv->wmm_enabled = false;
5867         priv->pending_tx_pkts = 0;
5868         atomic_set(&priv->watchdog_event_pending, 0);
5869
5870         rc = mwl8k_rxq_init(hw, 0);
5871         if (rc)
5872                 goto err_stop_firmware;
5873         rxq_refill(hw, 0, INT_MAX);
5874
5875         /* For the sta firmware, we need to know the dma addresses of tx queues
5876          * before sending MWL8K_CMD_GET_HW_SPEC.  So we must initialize them
5877          * prior to issuing this command.  But for the AP case, we learn the
5878          * total number of queues from the result CMD_GET_HW_SPEC, so for this
5879          * case we must initialize the tx queues after.
5880          */
5881         priv->num_ampdu_queues = 0;
5882         if (!priv->ap_fw) {
5883                 rc = mwl8k_init_txqs(hw);
5884                 if (rc)
5885                         goto err_free_queues;
5886         }
5887
5888         iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
5889         iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5890         iowrite32(MWL8K_A2H_INT_TX_DONE|MWL8K_A2H_INT_RX_READY|
5891                   MWL8K_A2H_INT_BA_WATCHDOG,
5892                   priv->regs + MWL8K_HIU_A2H_INTERRUPT_CLEAR_SEL);
5893         iowrite32(MWL8K_A2H_INT_OPC_DONE,
5894                   priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
5895
5896         rc = request_irq(priv->pdev->irq, mwl8k_interrupt,
5897                          IRQF_SHARED, MWL8K_NAME, hw);
5898         if (rc) {
5899                 wiphy_err(hw->wiphy, "failed to register IRQ handler\n");
5900                 goto err_free_queues;
5901         }
5902
5903         /*
5904          * When hw restart is requested,
5905          * mac80211 will take care of clearing
5906          * the ampdu streams, so do not clear
5907          * the ampdu state here
5908          */
5909         if (!priv->hw_restart_in_progress)
5910                 memset(priv->ampdu, 0, sizeof(priv->ampdu));
5911
5912         /*
5913          * Temporarily enable interrupts.  Initial firmware host
5914          * commands use interrupts and avoid polling.  Disable
5915          * interrupts when done.
5916          */
5917         iowrite32(MWL8K_A2H_EVENTS, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5918
5919         /* Get config data, mac addrs etc */
5920         if (priv->ap_fw) {
5921                 rc = mwl8k_cmd_get_hw_spec_ap(hw);
5922                 if (!rc)
5923                         rc = mwl8k_init_txqs(hw);
5924                 if (!rc)
5925                         rc = mwl8k_cmd_set_hw_spec(hw);
5926         } else {
5927                 rc = mwl8k_cmd_get_hw_spec_sta(hw);
5928         }
5929         if (rc) {
5930                 wiphy_err(hw->wiphy, "Cannot initialise firmware\n");
5931                 goto err_free_irq;
5932         }
5933
5934         /* Turn radio off */
5935         rc = mwl8k_cmd_radio_disable(hw);
5936         if (rc) {
5937                 wiphy_err(hw->wiphy, "Cannot disable\n");
5938                 goto err_free_irq;
5939         }
5940
5941         /* Clear MAC address */
5942         rc = mwl8k_cmd_set_mac_addr(hw, NULL, "\x00\x00\x00\x00\x00\x00");
5943         if (rc) {
5944                 wiphy_err(hw->wiphy, "Cannot clear MAC address\n");
5945                 goto err_free_irq;
5946         }
5947
5948         /* Configure Antennas */
5949         rc = mwl8k_cmd_rf_antenna(hw, MWL8K_RF_ANTENNA_RX, 0x3);
5950         if (rc)
5951                 wiphy_warn(hw->wiphy, "failed to set # of RX antennas");
5952         rc = mwl8k_cmd_rf_antenna(hw, MWL8K_RF_ANTENNA_TX, 0x7);
5953         if (rc)
5954                 wiphy_warn(hw->wiphy, "failed to set # of TX antennas");
5955
5956
5957         /* Disable interrupts */
5958         iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5959         free_irq(priv->pdev->irq, hw);
5960
5961         wiphy_info(hw->wiphy, "%s v%d, %pm, %s firmware %u.%u.%u.%u\n",
5962                    priv->device_info->part_name,
5963                    priv->hw_rev, hw->wiphy->perm_addr,
5964                    priv->ap_fw ? "AP" : "STA",
5965                    (priv->fw_rev >> 24) & 0xff, (priv->fw_rev >> 16) & 0xff,
5966                    (priv->fw_rev >> 8) & 0xff, priv->fw_rev & 0xff);
5967
5968         return 0;
5969
5970 err_free_irq:
5971         iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5972         free_irq(priv->pdev->irq, hw);
5973
5974 err_free_queues:
5975         for (i = 0; i < mwl8k_tx_queues(priv); i++)
5976                 mwl8k_txq_deinit(hw, i);
5977         mwl8k_rxq_deinit(hw, 0);
5978
5979 err_stop_firmware:
5980         mwl8k_hw_reset(priv);
5981
5982         return rc;
5983 }
5984
5985 /*
5986  * invoke mwl8k_reload_firmware to change the firmware image after the device
5987  * has already been registered
5988  */
5989 static int mwl8k_reload_firmware(struct ieee80211_hw *hw, char *fw_image)
5990 {
5991         int i, rc = 0;
5992         struct mwl8k_priv *priv = hw->priv;
5993         struct mwl8k_vif *vif, *tmp_vif;
5994
5995         mwl8k_stop(hw);
5996         mwl8k_rxq_deinit(hw, 0);
5997
5998         /*
5999          * All the existing interfaces are re-added by the ieee80211_reconfig;
6000          * which means driver should remove existing interfaces before calling
6001          * ieee80211_restart_hw
6002          */
6003         if (priv->hw_restart_in_progress)
6004                 list_for_each_entry_safe(vif, tmp_vif, &priv->vif_list, list)
6005                         mwl8k_remove_vif(priv, vif);
6006
6007         for (i = 0; i < mwl8k_tx_queues(priv); i++)
6008                 mwl8k_txq_deinit(hw, i);
6009
6010         rc = mwl8k_init_firmware(hw, fw_image, false);
6011         if (rc)
6012                 goto fail;
6013
6014         rc = mwl8k_probe_hw(hw);
6015         if (rc)
6016                 goto fail;
6017
6018         if (priv->hw_restart_in_progress)
6019                 return rc;
6020
6021         rc = mwl8k_start(hw);
6022         if (rc)
6023                 goto fail;
6024
6025         rc = mwl8k_config(hw, ~0);
6026         if (rc)
6027                 goto fail;
6028
6029         for (i = 0; i < MWL8K_TX_WMM_QUEUES; i++) {
6030                 rc = mwl8k_conf_tx(hw, NULL, i, &priv->wmm_params[i]);
6031                 if (rc)
6032                         goto fail;
6033         }
6034
6035         return rc;
6036
6037 fail:
6038         printk(KERN_WARNING "mwl8k: Failed to reload firmware image.\n");
6039         return rc;
6040 }
6041
6042 static const struct ieee80211_iface_limit ap_if_limits[] = {
6043         { .max = 8,     .types = BIT(NL80211_IFTYPE_AP) },
6044         { .max = 1,     .types = BIT(NL80211_IFTYPE_STATION) },
6045 };
6046
6047 static const struct ieee80211_iface_combination ap_if_comb = {
6048         .limits = ap_if_limits,
6049         .n_limits = ARRAY_SIZE(ap_if_limits),
6050         .max_interfaces = 8,
6051         .num_different_channels = 1,
6052 };
6053
6054
6055 static int mwl8k_firmware_load_success(struct mwl8k_priv *priv)
6056 {
6057         struct ieee80211_hw *hw = priv->hw;
6058         int i, rc;
6059
6060         rc = mwl8k_load_firmware(hw);
6061         mwl8k_release_firmware(priv);
6062         if (rc) {
6063                 wiphy_err(hw->wiphy, "Cannot start firmware\n");
6064                 return rc;
6065         }
6066
6067         /*
6068          * Extra headroom is the size of the required DMA header
6069          * minus the size of the smallest 802.11 frame (CTS frame).
6070          */
6071         hw->extra_tx_headroom =
6072                 sizeof(struct mwl8k_dma_data) - sizeof(struct ieee80211_cts);
6073
6074         hw->extra_tx_headroom -= priv->ap_fw ? REDUCED_TX_HEADROOM : 0;
6075
6076         hw->queues = MWL8K_TX_WMM_QUEUES;
6077
6078         /* Set rssi values to dBm */
6079         hw->flags |= IEEE80211_HW_SIGNAL_DBM | IEEE80211_HW_HAS_RATE_CONTROL;
6080
6081         /*
6082          * Ask mac80211 to not to trigger PS mode
6083          * based on PM bit of incoming frames.
6084          */
6085         if (priv->ap_fw)
6086                 hw->flags |= IEEE80211_HW_AP_LINK_PS;
6087
6088         hw->vif_data_size = sizeof(struct mwl8k_vif);
6089         hw->sta_data_size = sizeof(struct mwl8k_sta);
6090
6091         priv->macids_used = 0;
6092         INIT_LIST_HEAD(&priv->vif_list);
6093
6094         /* Set default radio state and preamble */
6095         priv->radio_on = false;
6096         priv->radio_short_preamble = false;
6097
6098         /* Finalize join worker */
6099         INIT_WORK(&priv->finalize_join_worker, mwl8k_finalize_join_worker);
6100         /* Handle watchdog ba events */
6101         INIT_WORK(&priv->watchdog_ba_handle, mwl8k_watchdog_ba_events);
6102         /* To reload the firmware if it crashes */
6103         INIT_WORK(&priv->fw_reload, mwl8k_hw_restart_work);
6104
6105         /* TX reclaim and RX tasklets.  */
6106         tasklet_init(&priv->poll_tx_task, mwl8k_tx_poll, (unsigned long)hw);
6107         tasklet_disable(&priv->poll_tx_task);
6108         tasklet_init(&priv->poll_rx_task, mwl8k_rx_poll, (unsigned long)hw);
6109         tasklet_disable(&priv->poll_rx_task);
6110
6111         /* Power management cookie */
6112         priv->cookie = pci_alloc_consistent(priv->pdev, 4, &priv->cookie_dma);
6113         if (priv->cookie == NULL)
6114                 return -ENOMEM;
6115
6116         mutex_init(&priv->fw_mutex);
6117         priv->fw_mutex_owner = NULL;
6118         priv->fw_mutex_depth = 0;
6119         priv->hostcmd_wait = NULL;
6120
6121         spin_lock_init(&priv->tx_lock);
6122
6123         spin_lock_init(&priv->stream_lock);
6124
6125         priv->tx_wait = NULL;
6126
6127         rc = mwl8k_probe_hw(hw);
6128         if (rc)
6129                 goto err_free_cookie;
6130
6131         hw->wiphy->interface_modes = 0;
6132
6133         if (priv->ap_macids_supported || priv->device_info->fw_image_ap) {
6134                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP);
6135                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_STATION);
6136                 hw->wiphy->iface_combinations = &ap_if_comb;
6137                 hw->wiphy->n_iface_combinations = 1;
6138         }
6139
6140         if (priv->sta_macids_supported || priv->device_info->fw_image_sta)
6141                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_STATION);
6142
6143         rc = ieee80211_register_hw(hw);
6144         if (rc) {
6145                 wiphy_err(hw->wiphy, "Cannot register device\n");
6146                 goto err_unprobe_hw;
6147         }
6148
6149         return 0;
6150
6151 err_unprobe_hw:
6152         for (i = 0; i < mwl8k_tx_queues(priv); i++)
6153                 mwl8k_txq_deinit(hw, i);
6154         mwl8k_rxq_deinit(hw, 0);
6155
6156 err_free_cookie:
6157         if (priv->cookie != NULL)
6158                 pci_free_consistent(priv->pdev, 4,
6159                                 priv->cookie, priv->cookie_dma);
6160
6161         return rc;
6162 }
6163 static int mwl8k_probe(struct pci_dev *pdev,
6164                                  const struct pci_device_id *id)
6165 {
6166         static int printed_version;
6167         struct ieee80211_hw *hw;
6168         struct mwl8k_priv *priv;
6169         struct mwl8k_device_info *di;
6170         int rc;
6171
6172         if (!printed_version) {
6173                 printk(KERN_INFO "%s version %s\n", MWL8K_DESC, MWL8K_VERSION);
6174                 printed_version = 1;
6175         }
6176
6177
6178         rc = pci_enable_device(pdev);
6179         if (rc) {
6180                 printk(KERN_ERR "%s: Cannot enable new PCI device\n",
6181                        MWL8K_NAME);
6182                 return rc;
6183         }
6184
6185         rc = pci_request_regions(pdev, MWL8K_NAME);
6186         if (rc) {
6187                 printk(KERN_ERR "%s: Cannot obtain PCI resources\n",
6188                        MWL8K_NAME);
6189                 goto err_disable_device;
6190         }
6191
6192         pci_set_master(pdev);
6193
6194
6195         hw = ieee80211_alloc_hw(sizeof(*priv), &mwl8k_ops);
6196         if (hw == NULL) {
6197                 printk(KERN_ERR "%s: ieee80211 alloc failed\n", MWL8K_NAME);
6198                 rc = -ENOMEM;
6199                 goto err_free_reg;
6200         }
6201
6202         SET_IEEE80211_DEV(hw, &pdev->dev);
6203         pci_set_drvdata(pdev, hw);
6204
6205         priv = hw->priv;
6206         priv->hw = hw;
6207         priv->pdev = pdev;
6208         priv->device_info = &mwl8k_info_tbl[id->driver_data];
6209
6210         if (id->driver_data == MWL8764)
6211                 priv->is_8764 = true;
6212
6213         priv->sram = pci_iomap(pdev, 0, 0x10000);
6214         if (priv->sram == NULL) {
6215                 wiphy_err(hw->wiphy, "Cannot map device SRAM\n");
6216                 rc = -EIO;
6217                 goto err_iounmap;
6218         }
6219
6220         /*
6221          * If BAR0 is a 32 bit BAR, the register BAR will be BAR1.
6222          * If BAR0 is a 64 bit BAR, the register BAR will be BAR2.
6223          */
6224         priv->regs = pci_iomap(pdev, 1, 0x10000);
6225         if (priv->regs == NULL) {
6226                 priv->regs = pci_iomap(pdev, 2, 0x10000);
6227                 if (priv->regs == NULL) {
6228                         wiphy_err(hw->wiphy, "Cannot map device registers\n");
6229                         rc = -EIO;
6230                         goto err_iounmap;
6231                 }
6232         }
6233
6234         /*
6235          * Choose the initial fw image depending on user input.  If a second
6236          * image is available, make it the alternative image that will be
6237          * loaded if the first one fails.
6238          */
6239         init_completion(&priv->firmware_loading_complete);
6240         di = priv->device_info;
6241         if (ap_mode_default && di->fw_image_ap) {
6242                 priv->fw_pref = di->fw_image_ap;
6243                 priv->fw_alt = di->fw_image_sta;
6244         } else if (!ap_mode_default && di->fw_image_sta) {
6245                 priv->fw_pref = di->fw_image_sta;
6246                 priv->fw_alt = di->fw_image_ap;
6247         } else if (ap_mode_default && !di->fw_image_ap && di->fw_image_sta) {
6248                 printk(KERN_WARNING "AP fw is unavailable.  Using STA fw.");
6249                 priv->fw_pref = di->fw_image_sta;
6250         } else if (!ap_mode_default && !di->fw_image_sta && di->fw_image_ap) {
6251                 printk(KERN_WARNING "STA fw is unavailable.  Using AP fw.");
6252                 priv->fw_pref = di->fw_image_ap;
6253         }
6254         rc = mwl8k_init_firmware(hw, priv->fw_pref, true);
6255         if (rc)
6256                 goto err_stop_firmware;
6257
6258         priv->hw_restart_in_progress = false;
6259
6260         priv->running_bsses = 0;
6261
6262         return rc;
6263
6264 err_stop_firmware:
6265         mwl8k_hw_reset(priv);
6266
6267 err_iounmap:
6268         if (priv->regs != NULL)
6269                 pci_iounmap(pdev, priv->regs);
6270
6271         if (priv->sram != NULL)
6272                 pci_iounmap(pdev, priv->sram);
6273
6274         ieee80211_free_hw(hw);
6275
6276 err_free_reg:
6277         pci_release_regions(pdev);
6278
6279 err_disable_device:
6280         pci_disable_device(pdev);
6281
6282         return rc;
6283 }
6284
6285 static void mwl8k_remove(struct pci_dev *pdev)
6286 {
6287         struct ieee80211_hw *hw = pci_get_drvdata(pdev);
6288         struct mwl8k_priv *priv;
6289         int i;
6290
6291         if (hw == NULL)
6292                 return;
6293         priv = hw->priv;
6294
6295         wait_for_completion(&priv->firmware_loading_complete);
6296
6297         if (priv->fw_state == FW_STATE_ERROR) {
6298                 mwl8k_hw_reset(priv);
6299                 goto unmap;
6300         }
6301
6302         ieee80211_stop_queues(hw);
6303
6304         ieee80211_unregister_hw(hw);
6305
6306         /* Remove TX reclaim and RX tasklets.  */
6307         tasklet_kill(&priv->poll_tx_task);
6308         tasklet_kill(&priv->poll_rx_task);
6309
6310         /* Stop hardware */
6311         mwl8k_hw_reset(priv);
6312
6313         /* Return all skbs to mac80211 */
6314         for (i = 0; i < mwl8k_tx_queues(priv); i++)
6315                 mwl8k_txq_reclaim(hw, i, INT_MAX, 1);
6316
6317         for (i = 0; i < mwl8k_tx_queues(priv); i++)
6318                 mwl8k_txq_deinit(hw, i);
6319
6320         mwl8k_rxq_deinit(hw, 0);
6321
6322         pci_free_consistent(priv->pdev, 4, priv->cookie, priv->cookie_dma);
6323
6324 unmap:
6325         pci_iounmap(pdev, priv->regs);
6326         pci_iounmap(pdev, priv->sram);
6327         ieee80211_free_hw(hw);
6328         pci_release_regions(pdev);
6329         pci_disable_device(pdev);
6330 }
6331
6332 static struct pci_driver mwl8k_driver = {
6333         .name           = MWL8K_NAME,
6334         .id_table       = mwl8k_pci_id_table,
6335         .probe          = mwl8k_probe,
6336         .remove         = mwl8k_remove,
6337 };
6338
6339 module_pci_driver(mwl8k_driver);
6340
6341 MODULE_DESCRIPTION(MWL8K_DESC);
6342 MODULE_VERSION(MWL8K_VERSION);
6343 MODULE_AUTHOR("Lennert Buytenhek <buytenh@marvell.com>");
6344 MODULE_LICENSE("GPL");