Back to home page

OSCL-LXR
 
 

     

0001 /*
0002  * drivers/net/wireless/mwl8k.c
0003  * Driver for Marvell TOPDOG 802.11 Wireless cards
0004  *
0005  * Copyright (C) 2008, 2009, 2010 Marvell Semiconductor Inc.
0006  *
0007  * This file is licensed under the terms of the GNU General Public
0008  * License version 2.  This program is licensed "as is" without any
0009  * warranty of any kind, whether express or implied.
0010  */
0011 
0012 #include <linux/interrupt.h>
0013 #include <linux/module.h>
0014 #include <linux/kernel.h>
0015 #include <linux/sched.h>
0016 #include <linux/spinlock.h>
0017 #include <linux/list.h>
0018 #include <linux/pci.h>
0019 #include <linux/delay.h>
0020 #include <linux/completion.h>
0021 #include <linux/etherdevice.h>
0022 #include <linux/slab.h>
0023 #include <net/mac80211.h>
0024 #include <linux/moduleparam.h>
0025 #include <linux/firmware.h>
0026 #include <linux/workqueue.h>
0027 
0028 #define MWL8K_DESC  "Marvell TOPDOG(R) 802.11 Wireless Network Driver"
0029 #define MWL8K_NAME  KBUILD_MODNAME
0030 #define MWL8K_VERSION   "0.13"
0031 
0032 /* Module parameters */
0033 static bool ap_mode_default;
0034 module_param(ap_mode_default, bool, 0);
0035 MODULE_PARM_DESC(ap_mode_default,
0036          "Set to 1 to make ap mode the default instead of sta mode");
0037 
0038 /* Register definitions */
0039 #define MWL8K_HIU_GEN_PTR           0x00000c10
0040 #define  MWL8K_MODE_STA              0x0000005a
0041 #define  MWL8K_MODE_AP               0x000000a5
0042 #define MWL8K_HIU_INT_CODE          0x00000c14
0043 #define  MWL8K_FWSTA_READY           0xf0f1f2f4
0044 #define  MWL8K_FWAP_READY            0xf1f2f4a5
0045 #define  MWL8K_INT_CODE_CMD_FINISHED         0x00000005
0046 #define MWL8K_HIU_SCRATCH           0x00000c40
0047 
0048 /* Host->device communications */
0049 #define MWL8K_HIU_H2A_INTERRUPT_EVENTS      0x00000c18
0050 #define MWL8K_HIU_H2A_INTERRUPT_STATUS      0x00000c1c
0051 #define MWL8K_HIU_H2A_INTERRUPT_MASK        0x00000c20
0052 #define MWL8K_HIU_H2A_INTERRUPT_CLEAR_SEL   0x00000c24
0053 #define MWL8K_HIU_H2A_INTERRUPT_STATUS_MASK 0x00000c28
0054 #define  MWL8K_H2A_INT_DUMMY             (1 << 20)
0055 #define  MWL8K_H2A_INT_RESET             (1 << 15)
0056 #define  MWL8K_H2A_INT_DOORBELL          (1 << 1)
0057 #define  MWL8K_H2A_INT_PPA_READY         (1 << 0)
0058 
0059 /* Device->host communications */
0060 #define MWL8K_HIU_A2H_INTERRUPT_EVENTS      0x00000c2c
0061 #define MWL8K_HIU_A2H_INTERRUPT_STATUS      0x00000c30
0062 #define MWL8K_HIU_A2H_INTERRUPT_MASK        0x00000c34
0063 #define MWL8K_HIU_A2H_INTERRUPT_CLEAR_SEL   0x00000c38
0064 #define MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK 0x00000c3c
0065 #define  MWL8K_A2H_INT_DUMMY             (1 << 20)
0066 #define  MWL8K_A2H_INT_BA_WATCHDOG       (1 << 14)
0067 #define  MWL8K_A2H_INT_CHNL_SWITCHED         (1 << 11)
0068 #define  MWL8K_A2H_INT_QUEUE_EMPTY       (1 << 10)
0069 #define  MWL8K_A2H_INT_RADAR_DETECT      (1 << 7)
0070 #define  MWL8K_A2H_INT_RADIO_ON          (1 << 6)
0071 #define  MWL8K_A2H_INT_RADIO_OFF         (1 << 5)
0072 #define  MWL8K_A2H_INT_MAC_EVENT         (1 << 3)
0073 #define  MWL8K_A2H_INT_OPC_DONE          (1 << 2)
0074 #define  MWL8K_A2H_INT_RX_READY          (1 << 1)
0075 #define  MWL8K_A2H_INT_TX_DONE           (1 << 0)
0076 
0077 /* HW micro second timer register
0078  * located at offset 0xA600. This
0079  * will be used to timestamp tx
0080  * packets.
0081  */
0082 
0083 #define MWL8K_HW_TIMER_REGISTER         0x0000a600
0084 #define BBU_RXRDY_CNT_REG           0x0000a860
0085 #define NOK_CCA_CNT_REG             0x0000a6a0
0086 #define BBU_AVG_NOISE_VAL           0x67
0087 
0088 #define MWL8K_A2H_EVENTS    (MWL8K_A2H_INT_DUMMY | \
0089                  MWL8K_A2H_INT_CHNL_SWITCHED | \
0090                  MWL8K_A2H_INT_QUEUE_EMPTY | \
0091                  MWL8K_A2H_INT_RADAR_DETECT | \
0092                  MWL8K_A2H_INT_RADIO_ON | \
0093                  MWL8K_A2H_INT_RADIO_OFF | \
0094                  MWL8K_A2H_INT_MAC_EVENT | \
0095                  MWL8K_A2H_INT_OPC_DONE | \
0096                  MWL8K_A2H_INT_RX_READY | \
0097                  MWL8K_A2H_INT_TX_DONE | \
0098                  MWL8K_A2H_INT_BA_WATCHDOG)
0099 
0100 #define MWL8K_RX_QUEUES     1
0101 #define MWL8K_TX_WMM_QUEUES 4
0102 #define MWL8K_MAX_AMPDU_QUEUES  8
0103 #define MWL8K_MAX_TX_QUEUES (MWL8K_TX_WMM_QUEUES + MWL8K_MAX_AMPDU_QUEUES)
0104 #define mwl8k_tx_queues(priv)   (MWL8K_TX_WMM_QUEUES + (priv)->num_ampdu_queues)
0105 
0106 /* txpriorities are mapped with hw queues.
0107  * Each hw queue has a txpriority.
0108  */
0109 #define TOTAL_HW_TX_QUEUES  8
0110 
0111 /* Each HW queue can have one AMPDU stream.
0112  * But, because one of the hw queue is reserved,
0113  * maximum AMPDU queues that can be created are
0114  * one short of total tx queues.
0115  */
0116 #define MWL8K_NUM_AMPDU_STREAMS (TOTAL_HW_TX_QUEUES - 1)
0117 
0118 #define MWL8K_NUM_CHANS 18
0119 
0120 struct rxd_ops {
0121     int rxd_size;
0122     void (*rxd_init)(void *rxd, dma_addr_t next_dma_addr);
0123     void (*rxd_refill)(void *rxd, dma_addr_t addr, int len);
0124     int (*rxd_process)(void *rxd, struct ieee80211_rx_status *status,
0125                __le16 *qos, s8 *noise);
0126 };
0127 
0128 struct mwl8k_device_info {
0129     char *part_name;
0130     char *helper_image;
0131     char *fw_image_sta;
0132     char *fw_image_ap;
0133     struct rxd_ops *ap_rxd_ops;
0134     u32 fw_api_ap;
0135 };
0136 
0137 struct mwl8k_rx_queue {
0138     int rxd_count;
0139 
0140     /* hw receives here */
0141     int head;
0142 
0143     /* refill descs here */
0144     int tail;
0145 
0146     void *rxd;
0147     dma_addr_t rxd_dma;
0148     struct {
0149         struct sk_buff *skb;
0150         DEFINE_DMA_UNMAP_ADDR(dma);
0151     } *buf;
0152 };
0153 
0154 struct mwl8k_tx_queue {
0155     /* hw transmits here */
0156     int head;
0157 
0158     /* sw appends here */
0159     int tail;
0160 
0161     unsigned int len;
0162     struct mwl8k_tx_desc *txd;
0163     dma_addr_t txd_dma;
0164     struct sk_buff **skb;
0165 };
0166 
0167 enum {
0168     AMPDU_NO_STREAM,
0169     AMPDU_STREAM_NEW,
0170     AMPDU_STREAM_IN_PROGRESS,
0171     AMPDU_STREAM_ACTIVE,
0172 };
0173 
0174 struct mwl8k_ampdu_stream {
0175     struct ieee80211_sta *sta;
0176     u8 tid;
0177     u8 state;
0178     u8 idx;
0179 };
0180 
0181 struct mwl8k_priv {
0182     struct ieee80211_hw *hw;
0183     struct pci_dev *pdev;
0184     int irq;
0185 
0186     struct mwl8k_device_info *device_info;
0187 
0188     void __iomem *sram;
0189     void __iomem *regs;
0190 
0191     /* firmware */
0192     const struct firmware *fw_helper;
0193     const struct firmware *fw_ucode;
0194 
0195     /* hardware/firmware parameters */
0196     bool ap_fw;
0197     struct rxd_ops *rxd_ops;
0198     struct ieee80211_supported_band band_24;
0199     struct ieee80211_channel channels_24[14];
0200     struct ieee80211_rate rates_24[13];
0201     struct ieee80211_supported_band band_50;
0202     struct ieee80211_channel channels_50[9];
0203     struct ieee80211_rate rates_50[8];
0204     u32 ap_macids_supported;
0205     u32 sta_macids_supported;
0206 
0207     /* Ampdu stream information */
0208     u8 num_ampdu_queues;
0209     spinlock_t stream_lock;
0210     struct mwl8k_ampdu_stream ampdu[MWL8K_MAX_AMPDU_QUEUES];
0211     struct work_struct watchdog_ba_handle;
0212 
0213     /* firmware access */
0214     struct mutex fw_mutex;
0215     struct task_struct *fw_mutex_owner;
0216     struct task_struct *hw_restart_owner;
0217     int fw_mutex_depth;
0218     struct completion *hostcmd_wait;
0219 
0220     atomic_t watchdog_event_pending;
0221 
0222     /* lock held over TX and TX reap */
0223     spinlock_t tx_lock;
0224 
0225     /* TX quiesce completion, protected by fw_mutex and tx_lock */
0226     struct completion *tx_wait;
0227 
0228     /* List of interfaces.  */
0229     u32 macids_used;
0230     struct list_head vif_list;
0231 
0232     /* power management status cookie from firmware */
0233     u32 *cookie;
0234     dma_addr_t cookie_dma;
0235 
0236     u16 num_mcaddrs;
0237     u8 hw_rev;
0238     u32 fw_rev;
0239     u32 caps;
0240 
0241     /*
0242      * Running count of TX packets in flight, to avoid
0243      * iterating over the transmit rings each time.
0244      */
0245     int pending_tx_pkts;
0246 
0247     struct mwl8k_rx_queue rxq[MWL8K_RX_QUEUES];
0248     struct mwl8k_tx_queue txq[MWL8K_MAX_TX_QUEUES];
0249     u32 txq_offset[MWL8K_MAX_TX_QUEUES];
0250 
0251     bool radio_on;
0252     bool radio_short_preamble;
0253     bool sniffer_enabled;
0254     bool wmm_enabled;
0255 
0256     /* XXX need to convert this to handle multiple interfaces */
0257     bool capture_beacon;
0258     u8 capture_bssid[ETH_ALEN];
0259     struct sk_buff *beacon_skb;
0260 
0261     /*
0262      * This FJ worker has to be global as it is scheduled from the
0263      * RX handler.  At this point we don't know which interface it
0264      * belongs to until the list of bssids waiting to complete join
0265      * is checked.
0266      */
0267     struct work_struct finalize_join_worker;
0268 
0269     /* Tasklet to perform TX reclaim.  */
0270     struct tasklet_struct poll_tx_task;
0271 
0272     /* Tasklet to perform RX.  */
0273     struct tasklet_struct poll_rx_task;
0274 
0275     /* Most recently reported noise in dBm */
0276     s8 noise;
0277 
0278     /*
0279      * preserve the queue configurations so they can be restored if/when
0280      * the firmware image is swapped.
0281      */
0282     struct ieee80211_tx_queue_params wmm_params[MWL8K_TX_WMM_QUEUES];
0283 
0284     /* To perform the task of reloading the firmware */
0285     struct work_struct fw_reload;
0286     bool hw_restart_in_progress;
0287 
0288     /* async firmware loading state */
0289     unsigned fw_state;
0290     char *fw_pref;
0291     char *fw_alt;
0292     bool is_8764;
0293     struct completion firmware_loading_complete;
0294 
0295     /* bitmap of running BSSes */
0296     u32 running_bsses;
0297 
0298     /* ACS related */
0299     bool sw_scan_start;
0300     struct ieee80211_channel *acs_chan;
0301     unsigned long channel_time;
0302     struct survey_info survey[MWL8K_NUM_CHANS];
0303 };
0304 
0305 #define MAX_WEP_KEY_LEN         13
0306 #define NUM_WEP_KEYS            4
0307 
0308 /* Per interface specific private data */
0309 struct mwl8k_vif {
0310     struct list_head list;
0311     struct ieee80211_vif *vif;
0312 
0313     /* Firmware macid for this vif.  */
0314     int macid;
0315 
0316     /* Non AMPDU sequence number assigned by driver.  */
0317     u16 seqno;
0318 
0319     /* Saved WEP keys */
0320     struct {
0321         u8 enabled;
0322         u8 key[sizeof(struct ieee80211_key_conf) + MAX_WEP_KEY_LEN];
0323     } wep_key_conf[NUM_WEP_KEYS];
0324 
0325     /* BSSID */
0326     u8 bssid[ETH_ALEN];
0327 
0328     /* A flag to indicate is HW crypto is enabled for this bssid */
0329     bool is_hw_crypto_enabled;
0330 };
0331 #define MWL8K_VIF(_vif) ((struct mwl8k_vif *)&((_vif)->drv_priv))
0332 #define IEEE80211_KEY_CONF(_u8) ((struct ieee80211_key_conf *)(_u8))
0333 
0334 struct tx_traffic_info {
0335     u32 start_time;
0336     u32 pkts;
0337 };
0338 
0339 #define MWL8K_MAX_TID 8
0340 struct mwl8k_sta {
0341     /* Index into station database. Returned by UPDATE_STADB.  */
0342     u8 peer_id;
0343     u8 is_ampdu_allowed;
0344     struct tx_traffic_info tx_stats[MWL8K_MAX_TID];
0345 };
0346 #define MWL8K_STA(_sta) ((struct mwl8k_sta *)&((_sta)->drv_priv))
0347 
0348 static const struct ieee80211_channel mwl8k_channels_24[] = {
0349     { .band = NL80211_BAND_2GHZ, .center_freq = 2412, .hw_value = 1, },
0350     { .band = NL80211_BAND_2GHZ, .center_freq = 2417, .hw_value = 2, },
0351     { .band = NL80211_BAND_2GHZ, .center_freq = 2422, .hw_value = 3, },
0352     { .band = NL80211_BAND_2GHZ, .center_freq = 2427, .hw_value = 4, },
0353     { .band = NL80211_BAND_2GHZ, .center_freq = 2432, .hw_value = 5, },
0354     { .band = NL80211_BAND_2GHZ, .center_freq = 2437, .hw_value = 6, },
0355     { .band = NL80211_BAND_2GHZ, .center_freq = 2442, .hw_value = 7, },
0356     { .band = NL80211_BAND_2GHZ, .center_freq = 2447, .hw_value = 8, },
0357     { .band = NL80211_BAND_2GHZ, .center_freq = 2452, .hw_value = 9, },
0358     { .band = NL80211_BAND_2GHZ, .center_freq = 2457, .hw_value = 10, },
0359     { .band = NL80211_BAND_2GHZ, .center_freq = 2462, .hw_value = 11, },
0360     { .band = NL80211_BAND_2GHZ, .center_freq = 2467, .hw_value = 12, },
0361     { .band = NL80211_BAND_2GHZ, .center_freq = 2472, .hw_value = 13, },
0362     { .band = NL80211_BAND_2GHZ, .center_freq = 2484, .hw_value = 14, },
0363 };
0364 
0365 static const struct ieee80211_rate mwl8k_rates_24[] = {
0366     { .bitrate = 10, .hw_value = 2, },
0367     { .bitrate = 20, .hw_value = 4, },
0368     { .bitrate = 55, .hw_value = 11, },
0369     { .bitrate = 110, .hw_value = 22, },
0370     { .bitrate = 220, .hw_value = 44, },
0371     { .bitrate = 60, .hw_value = 12, },
0372     { .bitrate = 90, .hw_value = 18, },
0373     { .bitrate = 120, .hw_value = 24, },
0374     { .bitrate = 180, .hw_value = 36, },
0375     { .bitrate = 240, .hw_value = 48, },
0376     { .bitrate = 360, .hw_value = 72, },
0377     { .bitrate = 480, .hw_value = 96, },
0378     { .bitrate = 540, .hw_value = 108, },
0379 };
0380 
0381 static const struct ieee80211_channel mwl8k_channels_50[] = {
0382     { .band = NL80211_BAND_5GHZ, .center_freq = 5180, .hw_value = 36, },
0383     { .band = NL80211_BAND_5GHZ, .center_freq = 5200, .hw_value = 40, },
0384     { .band = NL80211_BAND_5GHZ, .center_freq = 5220, .hw_value = 44, },
0385     { .band = NL80211_BAND_5GHZ, .center_freq = 5240, .hw_value = 48, },
0386     { .band = NL80211_BAND_5GHZ, .center_freq = 5745, .hw_value = 149, },
0387     { .band = NL80211_BAND_5GHZ, .center_freq = 5765, .hw_value = 153, },
0388     { .band = NL80211_BAND_5GHZ, .center_freq = 5785, .hw_value = 157, },
0389     { .band = NL80211_BAND_5GHZ, .center_freq = 5805, .hw_value = 161, },
0390     { .band = NL80211_BAND_5GHZ, .center_freq = 5825, .hw_value = 165, },
0391 };
0392 
0393 static const struct ieee80211_rate mwl8k_rates_50[] = {
0394     { .bitrate = 60, .hw_value = 12, },
0395     { .bitrate = 90, .hw_value = 18, },
0396     { .bitrate = 120, .hw_value = 24, },
0397     { .bitrate = 180, .hw_value = 36, },
0398     { .bitrate = 240, .hw_value = 48, },
0399     { .bitrate = 360, .hw_value = 72, },
0400     { .bitrate = 480, .hw_value = 96, },
0401     { .bitrate = 540, .hw_value = 108, },
0402 };
0403 
0404 /* Set or get info from Firmware */
0405 #define MWL8K_CMD_GET           0x0000
0406 #define MWL8K_CMD_SET           0x0001
0407 #define MWL8K_CMD_SET_LIST      0x0002
0408 
0409 /* Firmware command codes */
0410 #define MWL8K_CMD_CODE_DNLD     0x0001
0411 #define MWL8K_CMD_GET_HW_SPEC       0x0003
0412 #define MWL8K_CMD_SET_HW_SPEC       0x0004
0413 #define MWL8K_CMD_MAC_MULTICAST_ADR 0x0010
0414 #define MWL8K_CMD_GET_STAT      0x0014
0415 #define MWL8K_CMD_BBP_REG_ACCESS    0x001a
0416 #define MWL8K_CMD_RADIO_CONTROL     0x001c
0417 #define MWL8K_CMD_RF_TX_POWER       0x001e
0418 #define MWL8K_CMD_TX_POWER      0x001f
0419 #define MWL8K_CMD_RF_ANTENNA        0x0020
0420 #define MWL8K_CMD_SET_BEACON        0x0100      /* per-vif */
0421 #define MWL8K_CMD_SET_PRE_SCAN      0x0107
0422 #define MWL8K_CMD_SET_POST_SCAN     0x0108
0423 #define MWL8K_CMD_SET_RF_CHANNEL    0x010a
0424 #define MWL8K_CMD_SET_AID       0x010d
0425 #define MWL8K_CMD_SET_RATE      0x0110
0426 #define MWL8K_CMD_SET_FINALIZE_JOIN 0x0111
0427 #define MWL8K_CMD_RTS_THRESHOLD     0x0113
0428 #define MWL8K_CMD_SET_SLOT      0x0114
0429 #define MWL8K_CMD_SET_EDCA_PARAMS   0x0115
0430 #define MWL8K_CMD_SET_WMM_MODE      0x0123
0431 #define MWL8K_CMD_MIMO_CONFIG       0x0125
0432 #define MWL8K_CMD_USE_FIXED_RATE    0x0126
0433 #define MWL8K_CMD_ENABLE_SNIFFER    0x0150
0434 #define MWL8K_CMD_SET_MAC_ADDR      0x0202      /* per-vif */
0435 #define MWL8K_CMD_SET_RATEADAPT_MODE    0x0203
0436 #define MWL8K_CMD_GET_WATCHDOG_BITMAP   0x0205
0437 #define MWL8K_CMD_DEL_MAC_ADDR      0x0206      /* per-vif */
0438 #define MWL8K_CMD_BSS_START     0x1100      /* per-vif */
0439 #define MWL8K_CMD_SET_NEW_STN       0x1111      /* per-vif */
0440 #define MWL8K_CMD_UPDATE_ENCRYPTION 0x1122      /* per-vif */
0441 #define MWL8K_CMD_UPDATE_STADB      0x1123
0442 #define MWL8K_CMD_BASTREAM      0x1125
0443 
0444 #define MWL8K_LEGACY_5G_RATE_OFFSET \
0445     (ARRAY_SIZE(mwl8k_rates_24) - ARRAY_SIZE(mwl8k_rates_50))
0446 
0447 static const char *mwl8k_cmd_name(__le16 cmd, char *buf, int bufsize)
0448 {
0449     u16 command = le16_to_cpu(cmd);
0450 
0451 #define MWL8K_CMDNAME(x)    case MWL8K_CMD_##x: do {\
0452                     snprintf(buf, bufsize, "%s", #x);\
0453                     return buf;\
0454                     } while (0)
0455     switch (command & ~0x8000) {
0456         MWL8K_CMDNAME(CODE_DNLD);
0457         MWL8K_CMDNAME(GET_HW_SPEC);
0458         MWL8K_CMDNAME(SET_HW_SPEC);
0459         MWL8K_CMDNAME(MAC_MULTICAST_ADR);
0460         MWL8K_CMDNAME(GET_STAT);
0461         MWL8K_CMDNAME(RADIO_CONTROL);
0462         MWL8K_CMDNAME(RF_TX_POWER);
0463         MWL8K_CMDNAME(TX_POWER);
0464         MWL8K_CMDNAME(RF_ANTENNA);
0465         MWL8K_CMDNAME(SET_BEACON);
0466         MWL8K_CMDNAME(SET_PRE_SCAN);
0467         MWL8K_CMDNAME(SET_POST_SCAN);
0468         MWL8K_CMDNAME(SET_RF_CHANNEL);
0469         MWL8K_CMDNAME(SET_AID);
0470         MWL8K_CMDNAME(SET_RATE);
0471         MWL8K_CMDNAME(SET_FINALIZE_JOIN);
0472         MWL8K_CMDNAME(RTS_THRESHOLD);
0473         MWL8K_CMDNAME(SET_SLOT);
0474         MWL8K_CMDNAME(SET_EDCA_PARAMS);
0475         MWL8K_CMDNAME(SET_WMM_MODE);
0476         MWL8K_CMDNAME(MIMO_CONFIG);
0477         MWL8K_CMDNAME(USE_FIXED_RATE);
0478         MWL8K_CMDNAME(ENABLE_SNIFFER);
0479         MWL8K_CMDNAME(SET_MAC_ADDR);
0480         MWL8K_CMDNAME(SET_RATEADAPT_MODE);
0481         MWL8K_CMDNAME(BSS_START);
0482         MWL8K_CMDNAME(SET_NEW_STN);
0483         MWL8K_CMDNAME(UPDATE_ENCRYPTION);
0484         MWL8K_CMDNAME(UPDATE_STADB);
0485         MWL8K_CMDNAME(BASTREAM);
0486         MWL8K_CMDNAME(GET_WATCHDOG_BITMAP);
0487     default:
0488         snprintf(buf, bufsize, "0x%x", cmd);
0489     }
0490 #undef MWL8K_CMDNAME
0491 
0492     return buf;
0493 }
0494 
0495 /* Hardware and firmware reset */
0496 static void mwl8k_hw_reset(struct mwl8k_priv *priv)
0497 {
0498     iowrite32(MWL8K_H2A_INT_RESET,
0499         priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
0500     iowrite32(MWL8K_H2A_INT_RESET,
0501         priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
0502     msleep(20);
0503 }
0504 
0505 /* Release fw image */
0506 static void mwl8k_release_fw(const struct firmware **fw)
0507 {
0508     if (*fw == NULL)
0509         return;
0510     release_firmware(*fw);
0511     *fw = NULL;
0512 }
0513 
0514 static void mwl8k_release_firmware(struct mwl8k_priv *priv)
0515 {
0516     mwl8k_release_fw(&priv->fw_ucode);
0517     mwl8k_release_fw(&priv->fw_helper);
0518 }
0519 
0520 /* states for asynchronous f/w loading */
0521 static void mwl8k_fw_state_machine(const struct firmware *fw, void *context);
0522 enum {
0523     FW_STATE_INIT = 0,
0524     FW_STATE_LOADING_PREF,
0525     FW_STATE_LOADING_ALT,
0526     FW_STATE_ERROR,
0527 };
0528 
0529 /* Request fw image */
0530 static int mwl8k_request_fw(struct mwl8k_priv *priv,
0531                 const char *fname, const struct firmware **fw,
0532                 bool nowait)
0533 {
0534     /* release current image */
0535     if (*fw != NULL)
0536         mwl8k_release_fw(fw);
0537 
0538     if (nowait)
0539         return request_firmware_nowait(THIS_MODULE, 1, fname,
0540                            &priv->pdev->dev, GFP_KERNEL,
0541                            priv, mwl8k_fw_state_machine);
0542     else
0543         return request_firmware(fw, fname, &priv->pdev->dev);
0544 }
0545 
0546 static int mwl8k_request_firmware(struct mwl8k_priv *priv, char *fw_image,
0547                   bool nowait)
0548 {
0549     struct mwl8k_device_info *di = priv->device_info;
0550     int rc;
0551 
0552     if (di->helper_image != NULL) {
0553         if (nowait)
0554             rc = mwl8k_request_fw(priv, di->helper_image,
0555                           &priv->fw_helper, true);
0556         else
0557             rc = mwl8k_request_fw(priv, di->helper_image,
0558                           &priv->fw_helper, false);
0559         if (rc)
0560             printk(KERN_ERR "%s: Error requesting helper fw %s\n",
0561                    pci_name(priv->pdev), di->helper_image);
0562 
0563         if (rc || nowait)
0564             return rc;
0565     }
0566 
0567     if (nowait) {
0568         /*
0569          * if we get here, no helper image is needed.  Skip the
0570          * FW_STATE_INIT state.
0571          */
0572         priv->fw_state = FW_STATE_LOADING_PREF;
0573         rc = mwl8k_request_fw(priv, fw_image,
0574                       &priv->fw_ucode,
0575                       true);
0576     } else
0577         rc = mwl8k_request_fw(priv, fw_image,
0578                       &priv->fw_ucode, false);
0579     if (rc) {
0580         printk(KERN_ERR "%s: Error requesting firmware file %s\n",
0581                pci_name(priv->pdev), fw_image);
0582         mwl8k_release_fw(&priv->fw_helper);
0583         return rc;
0584     }
0585 
0586     return 0;
0587 }
0588 
0589 struct mwl8k_cmd_pkt {
0590     __le16  code;
0591     __le16  length;
0592     __u8    seq_num;
0593     __u8    macid;
0594     __le16  result;
0595     char    payload[];
0596 } __packed;
0597 
0598 /*
0599  * Firmware loading.
0600  */
0601 static int
0602 mwl8k_send_fw_load_cmd(struct mwl8k_priv *priv, void *data, int length)
0603 {
0604     void __iomem *regs = priv->regs;
0605     dma_addr_t dma_addr;
0606     int loops;
0607 
0608     dma_addr = dma_map_single(&priv->pdev->dev, data, length,
0609                   DMA_TO_DEVICE);
0610     if (dma_mapping_error(&priv->pdev->dev, dma_addr))
0611         return -ENOMEM;
0612 
0613     iowrite32(dma_addr, regs + MWL8K_HIU_GEN_PTR);
0614     iowrite32(0, regs + MWL8K_HIU_INT_CODE);
0615     iowrite32(MWL8K_H2A_INT_DOORBELL,
0616         regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
0617     iowrite32(MWL8K_H2A_INT_DUMMY,
0618         regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
0619 
0620     loops = 1000;
0621     do {
0622         u32 int_code;
0623         if (priv->is_8764) {
0624             int_code = ioread32(regs +
0625                         MWL8K_HIU_H2A_INTERRUPT_STATUS);
0626             if (int_code == 0)
0627                 break;
0628         } else {
0629             int_code = ioread32(regs + MWL8K_HIU_INT_CODE);
0630             if (int_code == MWL8K_INT_CODE_CMD_FINISHED) {
0631                 iowrite32(0, regs + MWL8K_HIU_INT_CODE);
0632                 break;
0633             }
0634         }
0635         cond_resched();
0636         udelay(1);
0637     } while (--loops);
0638 
0639     dma_unmap_single(&priv->pdev->dev, dma_addr, length, DMA_TO_DEVICE);
0640 
0641     return loops ? 0 : -ETIMEDOUT;
0642 }
0643 
0644 static int mwl8k_load_fw_image(struct mwl8k_priv *priv,
0645                 const u8 *data, size_t length)
0646 {
0647     struct mwl8k_cmd_pkt *cmd;
0648     int done;
0649     int rc = 0;
0650 
0651     cmd = kmalloc(sizeof(*cmd) + 256, GFP_KERNEL);
0652     if (cmd == NULL)
0653         return -ENOMEM;
0654 
0655     cmd->code = cpu_to_le16(MWL8K_CMD_CODE_DNLD);
0656     cmd->seq_num = 0;
0657     cmd->macid = 0;
0658     cmd->result = 0;
0659 
0660     done = 0;
0661     while (length) {
0662         int block_size = length > 256 ? 256 : length;
0663 
0664         memcpy(cmd->payload, data + done, block_size);
0665         cmd->length = cpu_to_le16(block_size);
0666 
0667         rc = mwl8k_send_fw_load_cmd(priv, cmd,
0668                         sizeof(*cmd) + block_size);
0669         if (rc)
0670             break;
0671 
0672         done += block_size;
0673         length -= block_size;
0674     }
0675 
0676     if (!rc) {
0677         cmd->length = 0;
0678         rc = mwl8k_send_fw_load_cmd(priv, cmd, sizeof(*cmd));
0679     }
0680 
0681     kfree(cmd);
0682 
0683     return rc;
0684 }
0685 
0686 static int mwl8k_feed_fw_image(struct mwl8k_priv *priv,
0687                 const u8 *data, size_t length)
0688 {
0689     unsigned char *buffer;
0690     int may_continue, rc = 0;
0691     u32 done, prev_block_size;
0692 
0693     buffer = kmalloc(1024, GFP_KERNEL);
0694     if (buffer == NULL)
0695         return -ENOMEM;
0696 
0697     done = 0;
0698     prev_block_size = 0;
0699     may_continue = 1000;
0700     while (may_continue > 0) {
0701         u32 block_size;
0702 
0703         block_size = ioread32(priv->regs + MWL8K_HIU_SCRATCH);
0704         if (block_size & 1) {
0705             block_size &= ~1;
0706             may_continue--;
0707         } else {
0708             done += prev_block_size;
0709             length -= prev_block_size;
0710         }
0711 
0712         if (block_size > 1024 || block_size > length) {
0713             rc = -EOVERFLOW;
0714             break;
0715         }
0716 
0717         if (length == 0) {
0718             rc = 0;
0719             break;
0720         }
0721 
0722         if (block_size == 0) {
0723             rc = -EPROTO;
0724             may_continue--;
0725             udelay(1);
0726             continue;
0727         }
0728 
0729         prev_block_size = block_size;
0730         memcpy(buffer, data + done, block_size);
0731 
0732         rc = mwl8k_send_fw_load_cmd(priv, buffer, block_size);
0733         if (rc)
0734             break;
0735     }
0736 
0737     if (!rc && length != 0)
0738         rc = -EREMOTEIO;
0739 
0740     kfree(buffer);
0741 
0742     return rc;
0743 }
0744 
0745 static int mwl8k_load_firmware(struct ieee80211_hw *hw)
0746 {
0747     struct mwl8k_priv *priv = hw->priv;
0748     const struct firmware *fw = priv->fw_ucode;
0749     int rc;
0750     int loops;
0751 
0752     if (!memcmp(fw->data, "\x01\x00\x00\x00", 4) && !priv->is_8764) {
0753         const struct firmware *helper = priv->fw_helper;
0754 
0755         if (helper == NULL) {
0756             printk(KERN_ERR "%s: helper image needed but none "
0757                    "given\n", pci_name(priv->pdev));
0758             return -EINVAL;
0759         }
0760 
0761         rc = mwl8k_load_fw_image(priv, helper->data, helper->size);
0762         if (rc) {
0763             printk(KERN_ERR "%s: unable to load firmware "
0764                    "helper image\n", pci_name(priv->pdev));
0765             return rc;
0766         }
0767         msleep(20);
0768 
0769         rc = mwl8k_feed_fw_image(priv, fw->data, fw->size);
0770     } else {
0771         if (priv->is_8764)
0772             rc = mwl8k_feed_fw_image(priv, fw->data, fw->size);
0773         else
0774             rc = mwl8k_load_fw_image(priv, fw->data, fw->size);
0775     }
0776 
0777     if (rc) {
0778         printk(KERN_ERR "%s: unable to load firmware image\n",
0779                pci_name(priv->pdev));
0780         return rc;
0781     }
0782 
0783     iowrite32(MWL8K_MODE_STA, priv->regs + MWL8K_HIU_GEN_PTR);
0784 
0785     loops = 500000;
0786     do {
0787         u32 ready_code;
0788 
0789         ready_code = ioread32(priv->regs + MWL8K_HIU_INT_CODE);
0790         if (ready_code == MWL8K_FWAP_READY) {
0791             priv->ap_fw = true;
0792             break;
0793         } else if (ready_code == MWL8K_FWSTA_READY) {
0794             priv->ap_fw = false;
0795             break;
0796         }
0797 
0798         cond_resched();
0799         udelay(1);
0800     } while (--loops);
0801 
0802     return loops ? 0 : -ETIMEDOUT;
0803 }
0804 
0805 
0806 /* DMA header used by firmware and hardware.  */
0807 struct mwl8k_dma_data {
0808     __le16 fwlen;
0809     struct ieee80211_hdr wh;
0810     char data[];
0811 } __packed __aligned(2);
0812 
0813 /* Routines to add/remove DMA header from skb.  */
0814 static inline void mwl8k_remove_dma_header(struct sk_buff *skb, __le16 qos)
0815 {
0816     struct mwl8k_dma_data *tr;
0817     int hdrlen;
0818 
0819     tr = (struct mwl8k_dma_data *)skb->data;
0820     hdrlen = ieee80211_hdrlen(tr->wh.frame_control);
0821 
0822     if (hdrlen != sizeof(tr->wh)) {
0823         if (ieee80211_is_data_qos(tr->wh.frame_control)) {
0824             memmove(tr->data - hdrlen, &tr->wh, hdrlen - 2);
0825             *((__le16 *)(tr->data - 2)) = qos;
0826         } else {
0827             memmove(tr->data - hdrlen, &tr->wh, hdrlen);
0828         }
0829     }
0830 
0831     if (hdrlen != sizeof(*tr))
0832         skb_pull(skb, sizeof(*tr) - hdrlen);
0833 }
0834 
0835 #define REDUCED_TX_HEADROOM 8
0836 
0837 static void
0838 mwl8k_add_dma_header(struct mwl8k_priv *priv, struct sk_buff *skb,
0839                         int head_pad, int tail_pad)
0840 {
0841     struct ieee80211_hdr *wh;
0842     int hdrlen;
0843     int reqd_hdrlen;
0844     struct mwl8k_dma_data *tr;
0845 
0846     /*
0847      * Add a firmware DMA header; the firmware requires that we
0848      * present a 2-byte payload length followed by a 4-address
0849      * header (without QoS field), followed (optionally) by any
0850      * WEP/ExtIV header (but only filled in for CCMP).
0851      */
0852     wh = (struct ieee80211_hdr *)skb->data;
0853 
0854     hdrlen = ieee80211_hdrlen(wh->frame_control);
0855 
0856     /*
0857      * Check if skb_resize is required because of
0858      * tx_headroom adjustment.
0859      */
0860     if (priv->ap_fw && (hdrlen < (sizeof(struct ieee80211_cts)
0861                         + REDUCED_TX_HEADROOM))) {
0862         if (pskb_expand_head(skb, REDUCED_TX_HEADROOM, 0, GFP_ATOMIC)) {
0863 
0864             wiphy_err(priv->hw->wiphy,
0865                     "Failed to reallocate TX buffer\n");
0866             return;
0867         }
0868         skb->truesize += REDUCED_TX_HEADROOM;
0869     }
0870 
0871     reqd_hdrlen = sizeof(*tr) + head_pad;
0872 
0873     if (hdrlen != reqd_hdrlen)
0874         skb_push(skb, reqd_hdrlen - hdrlen);
0875 
0876     if (ieee80211_is_data_qos(wh->frame_control))
0877         hdrlen -= IEEE80211_QOS_CTL_LEN;
0878 
0879     tr = (struct mwl8k_dma_data *)skb->data;
0880     if (wh != &tr->wh)
0881         memmove(&tr->wh, wh, hdrlen);
0882     if (hdrlen != sizeof(tr->wh))
0883         memset(((void *)&tr->wh) + hdrlen, 0, sizeof(tr->wh) - hdrlen);
0884 
0885     /*
0886      * Firmware length is the length of the fully formed "802.11
0887      * payload".  That is, everything except for the 802.11 header.
0888      * This includes all crypto material including the MIC.
0889      */
0890     tr->fwlen = cpu_to_le16(skb->len - sizeof(*tr) + tail_pad);
0891 }
0892 
0893 static void mwl8k_encapsulate_tx_frame(struct mwl8k_priv *priv,
0894         struct sk_buff *skb)
0895 {
0896     struct ieee80211_hdr *wh;
0897     struct ieee80211_tx_info *tx_info;
0898     struct ieee80211_key_conf *key_conf;
0899     int data_pad;
0900     int head_pad = 0;
0901 
0902     wh = (struct ieee80211_hdr *)skb->data;
0903 
0904     tx_info = IEEE80211_SKB_CB(skb);
0905 
0906     key_conf = NULL;
0907     if (ieee80211_is_data(wh->frame_control))
0908         key_conf = tx_info->control.hw_key;
0909 
0910     /*
0911      * Make sure the packet header is in the DMA header format (4-address
0912      * without QoS), and add head & tail padding when HW crypto is enabled.
0913      *
0914      * We have the following trailer padding requirements:
0915      * - WEP: 4 trailer bytes (ICV)
0916      * - TKIP: 12 trailer bytes (8 MIC + 4 ICV)
0917      * - CCMP: 8 trailer bytes (MIC)
0918      */
0919     data_pad = 0;
0920     if (key_conf != NULL) {
0921         head_pad = key_conf->iv_len;
0922         switch (key_conf->cipher) {
0923         case WLAN_CIPHER_SUITE_WEP40:
0924         case WLAN_CIPHER_SUITE_WEP104:
0925             data_pad = 4;
0926             break;
0927         case WLAN_CIPHER_SUITE_TKIP:
0928             data_pad = 12;
0929             break;
0930         case WLAN_CIPHER_SUITE_CCMP:
0931             data_pad = 8;
0932             break;
0933         }
0934     }
0935     mwl8k_add_dma_header(priv, skb, head_pad, data_pad);
0936 }
0937 
0938 /*
0939  * Packet reception for 88w8366/88w8764 AP firmware.
0940  */
0941 struct mwl8k_rxd_ap {
0942     __le16 pkt_len;
0943     __u8 sq2;
0944     __u8 rate;
0945     __le32 pkt_phys_addr;
0946     __le32 next_rxd_phys_addr;
0947     __le16 qos_control;
0948     __le16 htsig2;
0949     __le32 hw_rssi_info;
0950     __le32 hw_noise_floor_info;
0951     __u8 noise_floor;
0952     __u8 pad0[3];
0953     __u8 rssi;
0954     __u8 rx_status;
0955     __u8 channel;
0956     __u8 rx_ctrl;
0957 } __packed;
0958 
0959 #define MWL8K_AP_RATE_INFO_MCS_FORMAT       0x80
0960 #define MWL8K_AP_RATE_INFO_40MHZ        0x40
0961 #define MWL8K_AP_RATE_INFO_RATEID(x)        ((x) & 0x3f)
0962 
0963 #define MWL8K_AP_RX_CTRL_OWNED_BY_HOST      0x80
0964 
0965 /* 8366/8764 AP rx_status bits */
0966 #define MWL8K_AP_RXSTAT_DECRYPT_ERR_MASK        0x80
0967 #define MWL8K_AP_RXSTAT_GENERAL_DECRYPT_ERR     0xFF
0968 #define MWL8K_AP_RXSTAT_TKIP_DECRYPT_MIC_ERR        0x02
0969 #define MWL8K_AP_RXSTAT_WEP_DECRYPT_ICV_ERR     0x04
0970 #define MWL8K_AP_RXSTAT_TKIP_DECRYPT_ICV_ERR        0x08
0971 
0972 static void mwl8k_rxd_ap_init(void *_rxd, dma_addr_t next_dma_addr)
0973 {
0974     struct mwl8k_rxd_ap *rxd = _rxd;
0975 
0976     rxd->next_rxd_phys_addr = cpu_to_le32(next_dma_addr);
0977     rxd->rx_ctrl = MWL8K_AP_RX_CTRL_OWNED_BY_HOST;
0978 }
0979 
0980 static void mwl8k_rxd_ap_refill(void *_rxd, dma_addr_t addr, int len)
0981 {
0982     struct mwl8k_rxd_ap *rxd = _rxd;
0983 
0984     rxd->pkt_len = cpu_to_le16(len);
0985     rxd->pkt_phys_addr = cpu_to_le32(addr);
0986     wmb();
0987     rxd->rx_ctrl = 0;
0988 }
0989 
0990 static int
0991 mwl8k_rxd_ap_process(void *_rxd, struct ieee80211_rx_status *status,
0992              __le16 *qos, s8 *noise)
0993 {
0994     struct mwl8k_rxd_ap *rxd = _rxd;
0995 
0996     if (!(rxd->rx_ctrl & MWL8K_AP_RX_CTRL_OWNED_BY_HOST))
0997         return -1;
0998     rmb();
0999 
1000     memset(status, 0, sizeof(*status));
1001 
1002     status->signal = -rxd->rssi;
1003     *noise = -rxd->noise_floor;
1004 
1005     if (rxd->rate & MWL8K_AP_RATE_INFO_MCS_FORMAT) {
1006         status->encoding = RX_ENC_HT;
1007         if (rxd->rate & MWL8K_AP_RATE_INFO_40MHZ)
1008             status->bw = RATE_INFO_BW_40;
1009         status->rate_idx = MWL8K_AP_RATE_INFO_RATEID(rxd->rate);
1010     } else {
1011         int i;
1012 
1013         for (i = 0; i < ARRAY_SIZE(mwl8k_rates_24); i++) {
1014             if (mwl8k_rates_24[i].hw_value == rxd->rate) {
1015                 status->rate_idx = i;
1016                 break;
1017             }
1018         }
1019     }
1020 
1021     if (rxd->channel > 14) {
1022         status->band = NL80211_BAND_5GHZ;
1023         if (!(status->encoding == RX_ENC_HT) &&
1024             status->rate_idx >= MWL8K_LEGACY_5G_RATE_OFFSET)
1025             status->rate_idx -= MWL8K_LEGACY_5G_RATE_OFFSET;
1026     } else {
1027         status->band = NL80211_BAND_2GHZ;
1028     }
1029     status->freq = ieee80211_channel_to_frequency(rxd->channel,
1030                               status->band);
1031 
1032     *qos = rxd->qos_control;
1033 
1034     if ((rxd->rx_status != MWL8K_AP_RXSTAT_GENERAL_DECRYPT_ERR) &&
1035         (rxd->rx_status & MWL8K_AP_RXSTAT_DECRYPT_ERR_MASK) &&
1036         (rxd->rx_status & MWL8K_AP_RXSTAT_TKIP_DECRYPT_MIC_ERR))
1037         status->flag |= RX_FLAG_MMIC_ERROR;
1038 
1039     return le16_to_cpu(rxd->pkt_len);
1040 }
1041 
1042 static struct rxd_ops rxd_ap_ops = {
1043     .rxd_size   = sizeof(struct mwl8k_rxd_ap),
1044     .rxd_init   = mwl8k_rxd_ap_init,
1045     .rxd_refill = mwl8k_rxd_ap_refill,
1046     .rxd_process    = mwl8k_rxd_ap_process,
1047 };
1048 
1049 /*
1050  * Packet reception for STA firmware.
1051  */
1052 struct mwl8k_rxd_sta {
1053     __le16 pkt_len;
1054     __u8 link_quality;
1055     __u8 noise_level;
1056     __le32 pkt_phys_addr;
1057     __le32 next_rxd_phys_addr;
1058     __le16 qos_control;
1059     __le16 rate_info;
1060     __le32 pad0[4];
1061     __u8 rssi;
1062     __u8 channel;
1063     __le16 pad1;
1064     __u8 rx_ctrl;
1065     __u8 rx_status;
1066     __u8 pad2[2];
1067 } __packed;
1068 
1069 #define MWL8K_STA_RATE_INFO_SHORTPRE        0x8000
1070 #define MWL8K_STA_RATE_INFO_ANTSELECT(x)    (((x) >> 11) & 0x3)
1071 #define MWL8K_STA_RATE_INFO_RATEID(x)       (((x) >> 3) & 0x3f)
1072 #define MWL8K_STA_RATE_INFO_40MHZ       0x0004
1073 #define MWL8K_STA_RATE_INFO_SHORTGI     0x0002
1074 #define MWL8K_STA_RATE_INFO_MCS_FORMAT      0x0001
1075 
1076 #define MWL8K_STA_RX_CTRL_OWNED_BY_HOST     0x02
1077 #define MWL8K_STA_RX_CTRL_DECRYPT_ERROR     0x04
1078 /* ICV=0 or MIC=1 */
1079 #define MWL8K_STA_RX_CTRL_DEC_ERR_TYPE      0x08
1080 /* Key is uploaded only in failure case */
1081 #define MWL8K_STA_RX_CTRL_KEY_INDEX         0x30
1082 
1083 static void mwl8k_rxd_sta_init(void *_rxd, dma_addr_t next_dma_addr)
1084 {
1085     struct mwl8k_rxd_sta *rxd = _rxd;
1086 
1087     rxd->next_rxd_phys_addr = cpu_to_le32(next_dma_addr);
1088     rxd->rx_ctrl = MWL8K_STA_RX_CTRL_OWNED_BY_HOST;
1089 }
1090 
1091 static void mwl8k_rxd_sta_refill(void *_rxd, dma_addr_t addr, int len)
1092 {
1093     struct mwl8k_rxd_sta *rxd = _rxd;
1094 
1095     rxd->pkt_len = cpu_to_le16(len);
1096     rxd->pkt_phys_addr = cpu_to_le32(addr);
1097     wmb();
1098     rxd->rx_ctrl = 0;
1099 }
1100 
1101 static int
1102 mwl8k_rxd_sta_process(void *_rxd, struct ieee80211_rx_status *status,
1103                __le16 *qos, s8 *noise)
1104 {
1105     struct mwl8k_rxd_sta *rxd = _rxd;
1106     u16 rate_info;
1107 
1108     if (!(rxd->rx_ctrl & MWL8K_STA_RX_CTRL_OWNED_BY_HOST))
1109         return -1;
1110     rmb();
1111 
1112     rate_info = le16_to_cpu(rxd->rate_info);
1113 
1114     memset(status, 0, sizeof(*status));
1115 
1116     status->signal = -rxd->rssi;
1117     *noise = -rxd->noise_level;
1118     status->antenna = MWL8K_STA_RATE_INFO_ANTSELECT(rate_info);
1119     status->rate_idx = MWL8K_STA_RATE_INFO_RATEID(rate_info);
1120 
1121     if (rate_info & MWL8K_STA_RATE_INFO_SHORTPRE)
1122         status->enc_flags |= RX_ENC_FLAG_SHORTPRE;
1123     if (rate_info & MWL8K_STA_RATE_INFO_40MHZ)
1124         status->bw = RATE_INFO_BW_40;
1125     if (rate_info & MWL8K_STA_RATE_INFO_SHORTGI)
1126         status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
1127     if (rate_info & MWL8K_STA_RATE_INFO_MCS_FORMAT)
1128         status->encoding = RX_ENC_HT;
1129 
1130     if (rxd->channel > 14) {
1131         status->band = NL80211_BAND_5GHZ;
1132         if (!(status->encoding == RX_ENC_HT) &&
1133             status->rate_idx >= MWL8K_LEGACY_5G_RATE_OFFSET)
1134             status->rate_idx -= MWL8K_LEGACY_5G_RATE_OFFSET;
1135     } else {
1136         status->band = NL80211_BAND_2GHZ;
1137     }
1138     status->freq = ieee80211_channel_to_frequency(rxd->channel,
1139                               status->band);
1140 
1141     *qos = rxd->qos_control;
1142     if ((rxd->rx_ctrl & MWL8K_STA_RX_CTRL_DECRYPT_ERROR) &&
1143         (rxd->rx_ctrl & MWL8K_STA_RX_CTRL_DEC_ERR_TYPE))
1144         status->flag |= RX_FLAG_MMIC_ERROR;
1145 
1146     return le16_to_cpu(rxd->pkt_len);
1147 }
1148 
1149 static struct rxd_ops rxd_sta_ops = {
1150     .rxd_size   = sizeof(struct mwl8k_rxd_sta),
1151     .rxd_init   = mwl8k_rxd_sta_init,
1152     .rxd_refill = mwl8k_rxd_sta_refill,
1153     .rxd_process    = mwl8k_rxd_sta_process,
1154 };
1155 
1156 
1157 #define MWL8K_RX_DESCS      256
1158 #define MWL8K_RX_MAXSZ      3800
1159 
1160 static int mwl8k_rxq_init(struct ieee80211_hw *hw, int index)
1161 {
1162     struct mwl8k_priv *priv = hw->priv;
1163     struct mwl8k_rx_queue *rxq = priv->rxq + index;
1164     int size;
1165     int i;
1166 
1167     rxq->rxd_count = 0;
1168     rxq->head = 0;
1169     rxq->tail = 0;
1170 
1171     size = MWL8K_RX_DESCS * priv->rxd_ops->rxd_size;
1172 
1173     rxq->rxd = dma_alloc_coherent(&priv->pdev->dev, size, &rxq->rxd_dma,
1174                       GFP_KERNEL);
1175     if (rxq->rxd == NULL) {
1176         wiphy_err(hw->wiphy, "failed to alloc RX descriptors\n");
1177         return -ENOMEM;
1178     }
1179 
1180     rxq->buf = kcalloc(MWL8K_RX_DESCS, sizeof(*rxq->buf), GFP_KERNEL);
1181     if (rxq->buf == NULL) {
1182         dma_free_coherent(&priv->pdev->dev, size, rxq->rxd,
1183                   rxq->rxd_dma);
1184         return -ENOMEM;
1185     }
1186 
1187     for (i = 0; i < MWL8K_RX_DESCS; i++) {
1188         int desc_size;
1189         void *rxd;
1190         int nexti;
1191         dma_addr_t next_dma_addr;
1192 
1193         desc_size = priv->rxd_ops->rxd_size;
1194         rxd = rxq->rxd + (i * priv->rxd_ops->rxd_size);
1195 
1196         nexti = i + 1;
1197         if (nexti == MWL8K_RX_DESCS)
1198             nexti = 0;
1199         next_dma_addr = rxq->rxd_dma + (nexti * desc_size);
1200 
1201         priv->rxd_ops->rxd_init(rxd, next_dma_addr);
1202     }
1203 
1204     return 0;
1205 }
1206 
1207 static int rxq_refill(struct ieee80211_hw *hw, int index, int limit)
1208 {
1209     struct mwl8k_priv *priv = hw->priv;
1210     struct mwl8k_rx_queue *rxq = priv->rxq + index;
1211     int refilled = 0;
1212 
1213     while (rxq->rxd_count < MWL8K_RX_DESCS && limit--) {
1214         struct sk_buff *skb;
1215         dma_addr_t addr;
1216         int rx;
1217         void *rxd;
1218 
1219         skb = dev_alloc_skb(MWL8K_RX_MAXSZ);
1220         if (skb == NULL)
1221             break;
1222 
1223         addr = dma_map_single(&priv->pdev->dev, skb->data,
1224                       MWL8K_RX_MAXSZ, DMA_FROM_DEVICE);
1225 
1226         rxq->rxd_count++;
1227         rx = rxq->tail++;
1228         if (rxq->tail == MWL8K_RX_DESCS)
1229             rxq->tail = 0;
1230         rxq->buf[rx].skb = skb;
1231         dma_unmap_addr_set(&rxq->buf[rx], dma, addr);
1232 
1233         rxd = rxq->rxd + (rx * priv->rxd_ops->rxd_size);
1234         priv->rxd_ops->rxd_refill(rxd, addr, MWL8K_RX_MAXSZ);
1235 
1236         refilled++;
1237     }
1238 
1239     return refilled;
1240 }
1241 
1242 /* Must be called only when the card's reception is completely halted */
1243 static void mwl8k_rxq_deinit(struct ieee80211_hw *hw, int index)
1244 {
1245     struct mwl8k_priv *priv = hw->priv;
1246     struct mwl8k_rx_queue *rxq = priv->rxq + index;
1247     int i;
1248 
1249     if (rxq->rxd == NULL)
1250         return;
1251 
1252     for (i = 0; i < MWL8K_RX_DESCS; i++) {
1253         if (rxq->buf[i].skb != NULL) {
1254             dma_unmap_single(&priv->pdev->dev,
1255                      dma_unmap_addr(&rxq->buf[i], dma),
1256                      MWL8K_RX_MAXSZ, DMA_FROM_DEVICE);
1257             dma_unmap_addr_set(&rxq->buf[i], dma, 0);
1258 
1259             kfree_skb(rxq->buf[i].skb);
1260             rxq->buf[i].skb = NULL;
1261         }
1262     }
1263 
1264     kfree(rxq->buf);
1265     rxq->buf = NULL;
1266 
1267     dma_free_coherent(&priv->pdev->dev,
1268               MWL8K_RX_DESCS * priv->rxd_ops->rxd_size, rxq->rxd,
1269               rxq->rxd_dma);
1270     rxq->rxd = NULL;
1271 }
1272 
1273 
1274 /*
1275  * Scan a list of BSSIDs to process for finalize join.
1276  * Allows for extension to process multiple BSSIDs.
1277  */
1278 static inline int
1279 mwl8k_capture_bssid(struct mwl8k_priv *priv, struct ieee80211_hdr *wh)
1280 {
1281     return priv->capture_beacon &&
1282         ieee80211_is_beacon(wh->frame_control) &&
1283         ether_addr_equal_64bits(wh->addr3, priv->capture_bssid);
1284 }
1285 
1286 static inline void mwl8k_save_beacon(struct ieee80211_hw *hw,
1287                      struct sk_buff *skb)
1288 {
1289     struct mwl8k_priv *priv = hw->priv;
1290 
1291     priv->capture_beacon = false;
1292     eth_zero_addr(priv->capture_bssid);
1293 
1294     /*
1295      * Use GFP_ATOMIC as rxq_process is called from
1296      * the primary interrupt handler, memory allocation call
1297      * must not sleep.
1298      */
1299     priv->beacon_skb = skb_copy(skb, GFP_ATOMIC);
1300     if (priv->beacon_skb != NULL)
1301         ieee80211_queue_work(hw, &priv->finalize_join_worker);
1302 }
1303 
1304 static inline struct mwl8k_vif *mwl8k_find_vif_bss(struct list_head *vif_list,
1305                            u8 *bssid)
1306 {
1307     struct mwl8k_vif *mwl8k_vif;
1308 
1309     list_for_each_entry(mwl8k_vif,
1310                 vif_list, list) {
1311         if (memcmp(bssid, mwl8k_vif->bssid,
1312                ETH_ALEN) == 0)
1313             return mwl8k_vif;
1314     }
1315 
1316     return NULL;
1317 }
1318 
1319 static int rxq_process(struct ieee80211_hw *hw, int index, int limit)
1320 {
1321     struct mwl8k_priv *priv = hw->priv;
1322     struct mwl8k_vif *mwl8k_vif = NULL;
1323     struct mwl8k_rx_queue *rxq = priv->rxq + index;
1324     int processed;
1325 
1326     processed = 0;
1327     while (rxq->rxd_count && limit--) {
1328         struct sk_buff *skb;
1329         void *rxd;
1330         int pkt_len;
1331         struct ieee80211_rx_status status;
1332         struct ieee80211_hdr *wh;
1333         __le16 qos;
1334 
1335         skb = rxq->buf[rxq->head].skb;
1336         if (skb == NULL)
1337             break;
1338 
1339         rxd = rxq->rxd + (rxq->head * priv->rxd_ops->rxd_size);
1340 
1341         pkt_len = priv->rxd_ops->rxd_process(rxd, &status, &qos,
1342                             &priv->noise);
1343         if (pkt_len < 0)
1344             break;
1345 
1346         rxq->buf[rxq->head].skb = NULL;
1347 
1348         dma_unmap_single(&priv->pdev->dev,
1349                  dma_unmap_addr(&rxq->buf[rxq->head], dma),
1350                  MWL8K_RX_MAXSZ, DMA_FROM_DEVICE);
1351         dma_unmap_addr_set(&rxq->buf[rxq->head], dma, 0);
1352 
1353         rxq->head++;
1354         if (rxq->head == MWL8K_RX_DESCS)
1355             rxq->head = 0;
1356 
1357         rxq->rxd_count--;
1358 
1359         wh = &((struct mwl8k_dma_data *)skb->data)->wh;
1360 
1361         /*
1362          * Check for a pending join operation.  Save a
1363          * copy of the beacon and schedule a tasklet to
1364          * send a FINALIZE_JOIN command to the firmware.
1365          */
1366         if (mwl8k_capture_bssid(priv, (void *)skb->data))
1367             mwl8k_save_beacon(hw, skb);
1368 
1369         if (ieee80211_has_protected(wh->frame_control)) {
1370 
1371             /* Check if hw crypto has been enabled for
1372              * this bss. If yes, set the status flags
1373              * accordingly
1374              */
1375             mwl8k_vif = mwl8k_find_vif_bss(&priv->vif_list,
1376                                 wh->addr1);
1377 
1378             if (mwl8k_vif != NULL &&
1379                 mwl8k_vif->is_hw_crypto_enabled) {
1380                 /*
1381                  * When MMIC ERROR is encountered
1382                  * by the firmware, payload is
1383                  * dropped and only 32 bytes of
1384                  * mwl8k Firmware header is sent
1385                  * to the host.
1386                  *
1387                  * We need to add four bytes of
1388                  * key information.  In it
1389                  * MAC80211 expects keyidx set to
1390                  * 0 for triggering Counter
1391                  * Measure of MMIC failure.
1392                  */
1393                 if (status.flag & RX_FLAG_MMIC_ERROR) {
1394                     struct mwl8k_dma_data *tr;
1395                     tr = (struct mwl8k_dma_data *)skb->data;
1396                     memset((void *)&(tr->data), 0, 4);
1397                     pkt_len += 4;
1398                 }
1399 
1400                 if (!ieee80211_is_auth(wh->frame_control))
1401                     status.flag |= RX_FLAG_IV_STRIPPED |
1402                                RX_FLAG_DECRYPTED |
1403                                RX_FLAG_MMIC_STRIPPED;
1404             }
1405         }
1406 
1407         skb_put(skb, pkt_len);
1408         mwl8k_remove_dma_header(skb, qos);
1409         memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
1410         ieee80211_rx_irqsafe(hw, skb);
1411 
1412         processed++;
1413     }
1414 
1415     return processed;
1416 }
1417 
1418 
1419 /*
1420  * Packet transmission.
1421  */
1422 
1423 #define MWL8K_TXD_STATUS_OK         0x00000001
1424 #define MWL8K_TXD_STATUS_OK_RETRY       0x00000002
1425 #define MWL8K_TXD_STATUS_OK_MORE_RETRY      0x00000004
1426 #define MWL8K_TXD_STATUS_MULTICAST_TX       0x00000008
1427 #define MWL8K_TXD_STATUS_FW_OWNED       0x80000000
1428 
1429 #define MWL8K_QOS_QLEN_UNSPEC           0xff00
1430 #define MWL8K_QOS_ACK_POLICY_MASK       0x0060
1431 #define MWL8K_QOS_ACK_POLICY_NORMAL     0x0000
1432 #define MWL8K_QOS_ACK_POLICY_BLOCKACK       0x0060
1433 #define MWL8K_QOS_EOSP              0x0010
1434 
1435 struct mwl8k_tx_desc {
1436     __le32 status;
1437     __u8 data_rate;
1438     __u8 tx_priority;
1439     __le16 qos_control;
1440     __le32 pkt_phys_addr;
1441     __le16 pkt_len;
1442     __u8 dest_MAC_addr[ETH_ALEN];
1443     __le32 next_txd_phys_addr;
1444     __le32 timestamp;
1445     __le16 rate_info;
1446     __u8 peer_id;
1447     __u8 tx_frag_cnt;
1448 } __packed;
1449 
1450 #define MWL8K_TX_DESCS      128
1451 
1452 static int mwl8k_txq_init(struct ieee80211_hw *hw, int index)
1453 {
1454     struct mwl8k_priv *priv = hw->priv;
1455     struct mwl8k_tx_queue *txq = priv->txq + index;
1456     int size;
1457     int i;
1458 
1459     txq->len = 0;
1460     txq->head = 0;
1461     txq->tail = 0;
1462 
1463     size = MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc);
1464 
1465     txq->txd = dma_alloc_coherent(&priv->pdev->dev, size, &txq->txd_dma,
1466                       GFP_KERNEL);
1467     if (txq->txd == NULL) {
1468         wiphy_err(hw->wiphy, "failed to alloc TX descriptors\n");
1469         return -ENOMEM;
1470     }
1471 
1472     txq->skb = kcalloc(MWL8K_TX_DESCS, sizeof(*txq->skb), GFP_KERNEL);
1473     if (txq->skb == NULL) {
1474         dma_free_coherent(&priv->pdev->dev, size, txq->txd,
1475                   txq->txd_dma);
1476         txq->txd = NULL;
1477         return -ENOMEM;
1478     }
1479 
1480     for (i = 0; i < MWL8K_TX_DESCS; i++) {
1481         struct mwl8k_tx_desc *tx_desc;
1482         int nexti;
1483 
1484         tx_desc = txq->txd + i;
1485         nexti = (i + 1) % MWL8K_TX_DESCS;
1486 
1487         tx_desc->status = 0;
1488         tx_desc->next_txd_phys_addr =
1489             cpu_to_le32(txq->txd_dma + nexti * sizeof(*tx_desc));
1490     }
1491 
1492     return 0;
1493 }
1494 
1495 static inline void mwl8k_tx_start(struct mwl8k_priv *priv)
1496 {
1497     iowrite32(MWL8K_H2A_INT_PPA_READY,
1498         priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
1499     iowrite32(MWL8K_H2A_INT_DUMMY,
1500         priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
1501     ioread32(priv->regs + MWL8K_HIU_INT_CODE);
1502 }
1503 
1504 static void mwl8k_dump_tx_rings(struct ieee80211_hw *hw)
1505 {
1506     struct mwl8k_priv *priv = hw->priv;
1507     int i;
1508 
1509     for (i = 0; i < mwl8k_tx_queues(priv); i++) {
1510         struct mwl8k_tx_queue *txq = priv->txq + i;
1511         int fw_owned = 0;
1512         int drv_owned = 0;
1513         int unused = 0;
1514         int desc;
1515 
1516         for (desc = 0; desc < MWL8K_TX_DESCS; desc++) {
1517             struct mwl8k_tx_desc *tx_desc = txq->txd + desc;
1518             u32 status;
1519 
1520             status = le32_to_cpu(tx_desc->status);
1521             if (status & MWL8K_TXD_STATUS_FW_OWNED)
1522                 fw_owned++;
1523             else
1524                 drv_owned++;
1525 
1526             if (tx_desc->pkt_len == 0)
1527                 unused++;
1528         }
1529 
1530         wiphy_err(hw->wiphy,
1531               "txq[%d] len=%d head=%d tail=%d "
1532               "fw_owned=%d drv_owned=%d unused=%d\n",
1533               i,
1534               txq->len, txq->head, txq->tail,
1535               fw_owned, drv_owned, unused);
1536     }
1537 }
1538 
1539 /*
1540  * Must be called with priv->fw_mutex held and tx queues stopped.
1541  */
1542 #define MWL8K_TX_WAIT_TIMEOUT_MS    5000
1543 
1544 static int mwl8k_tx_wait_empty(struct ieee80211_hw *hw)
1545 {
1546     struct mwl8k_priv *priv = hw->priv;
1547     DECLARE_COMPLETION_ONSTACK(tx_wait);
1548     int retry;
1549     int rc;
1550 
1551     might_sleep();
1552 
1553     /* Since fw restart is in progress, allow only the firmware
1554      * commands from the restart code and block the other
1555      * commands since they are going to fail in any case since
1556      * the firmware has crashed
1557      */
1558     if (priv->hw_restart_in_progress) {
1559         if (priv->hw_restart_owner == current)
1560             return 0;
1561         else
1562             return -EBUSY;
1563     }
1564 
1565     if (atomic_read(&priv->watchdog_event_pending))
1566         return 0;
1567 
1568     /*
1569      * The TX queues are stopped at this point, so this test
1570      * doesn't need to take ->tx_lock.
1571      */
1572     if (!priv->pending_tx_pkts)
1573         return 0;
1574 
1575     retry = 1;
1576     rc = 0;
1577 
1578     spin_lock_bh(&priv->tx_lock);
1579     priv->tx_wait = &tx_wait;
1580     while (!rc) {
1581         int oldcount;
1582         unsigned long timeout;
1583 
1584         oldcount = priv->pending_tx_pkts;
1585 
1586         spin_unlock_bh(&priv->tx_lock);
1587         timeout = wait_for_completion_timeout(&tx_wait,
1588                 msecs_to_jiffies(MWL8K_TX_WAIT_TIMEOUT_MS));
1589 
1590         if (atomic_read(&priv->watchdog_event_pending)) {
1591             spin_lock_bh(&priv->tx_lock);
1592             priv->tx_wait = NULL;
1593             spin_unlock_bh(&priv->tx_lock);
1594             return 0;
1595         }
1596 
1597         spin_lock_bh(&priv->tx_lock);
1598 
1599         if (timeout || !priv->pending_tx_pkts) {
1600             WARN_ON(priv->pending_tx_pkts);
1601             if (retry)
1602                 wiphy_notice(hw->wiphy, "tx rings drained\n");
1603             break;
1604         }
1605 
1606         if (retry) {
1607             mwl8k_tx_start(priv);
1608             retry = 0;
1609             continue;
1610         }
1611 
1612         if (priv->pending_tx_pkts < oldcount) {
1613             wiphy_notice(hw->wiphy,
1614                      "waiting for tx rings to drain (%d -> %d pkts)\n",
1615                      oldcount, priv->pending_tx_pkts);
1616             retry = 1;
1617             continue;
1618         }
1619 
1620         priv->tx_wait = NULL;
1621 
1622         wiphy_err(hw->wiphy, "tx rings stuck for %d ms\n",
1623               MWL8K_TX_WAIT_TIMEOUT_MS);
1624         mwl8k_dump_tx_rings(hw);
1625         priv->hw_restart_in_progress = true;
1626         ieee80211_queue_work(hw, &priv->fw_reload);
1627 
1628         rc = -ETIMEDOUT;
1629     }
1630     priv->tx_wait = NULL;
1631     spin_unlock_bh(&priv->tx_lock);
1632 
1633     return rc;
1634 }
1635 
1636 #define MWL8K_TXD_SUCCESS(status)               \
1637     ((status) & (MWL8K_TXD_STATUS_OK |          \
1638              MWL8K_TXD_STATUS_OK_RETRY |        \
1639              MWL8K_TXD_STATUS_OK_MORE_RETRY))
1640 
1641 static int mwl8k_tid_queue_mapping(u8 tid)
1642 {
1643     BUG_ON(tid > 7);
1644 
1645     switch (tid) {
1646     case 0:
1647     case 3:
1648         return IEEE80211_AC_BE;
1649     case 1:
1650     case 2:
1651         return IEEE80211_AC_BK;
1652     case 4:
1653     case 5:
1654         return IEEE80211_AC_VI;
1655     case 6:
1656     case 7:
1657         return IEEE80211_AC_VO;
1658     default:
1659         return -1;
1660     }
1661 }
1662 
1663 /* The firmware will fill in the rate information
1664  * for each packet that gets queued in the hardware
1665  * and these macros will interpret that info.
1666  */
1667 
1668 #define RI_FORMAT(a)          (a & 0x0001)
1669 #define RI_RATE_ID_MCS(a)    ((a & 0x01f8) >> 3)
1670 
1671 static int
1672 mwl8k_txq_reclaim(struct ieee80211_hw *hw, int index, int limit, int force)
1673 {
1674     struct mwl8k_priv *priv = hw->priv;
1675     struct mwl8k_tx_queue *txq = priv->txq + index;
1676     int processed;
1677 
1678     processed = 0;
1679     while (txq->len > 0 && limit--) {
1680         int tx;
1681         struct mwl8k_tx_desc *tx_desc;
1682         unsigned long addr;
1683         int size;
1684         struct sk_buff *skb;
1685         struct ieee80211_tx_info *info;
1686         u32 status;
1687         struct ieee80211_sta *sta;
1688         struct mwl8k_sta *sta_info = NULL;
1689         u16 rate_info;
1690         struct ieee80211_hdr *wh;
1691 
1692         tx = txq->head;
1693         tx_desc = txq->txd + tx;
1694 
1695         status = le32_to_cpu(tx_desc->status);
1696 
1697         if (status & MWL8K_TXD_STATUS_FW_OWNED) {
1698             if (!force)
1699                 break;
1700             tx_desc->status &=
1701                 ~cpu_to_le32(MWL8K_TXD_STATUS_FW_OWNED);
1702         }
1703 
1704         txq->head = (tx + 1) % MWL8K_TX_DESCS;
1705         BUG_ON(txq->len == 0);
1706         txq->len--;
1707         priv->pending_tx_pkts--;
1708 
1709         addr = le32_to_cpu(tx_desc->pkt_phys_addr);
1710         size = le16_to_cpu(tx_desc->pkt_len);
1711         skb = txq->skb[tx];
1712         txq->skb[tx] = NULL;
1713 
1714         BUG_ON(skb == NULL);
1715         dma_unmap_single(&priv->pdev->dev, addr, size, DMA_TO_DEVICE);
1716 
1717         mwl8k_remove_dma_header(skb, tx_desc->qos_control);
1718 
1719         wh = (struct ieee80211_hdr *) skb->data;
1720 
1721         /* Mark descriptor as unused */
1722         tx_desc->pkt_phys_addr = 0;
1723         tx_desc->pkt_len = 0;
1724 
1725         info = IEEE80211_SKB_CB(skb);
1726         if (ieee80211_is_data(wh->frame_control)) {
1727             rcu_read_lock();
1728             sta = ieee80211_find_sta_by_ifaddr(hw, wh->addr1,
1729                                wh->addr2);
1730             if (sta) {
1731                 sta_info = MWL8K_STA(sta);
1732                 BUG_ON(sta_info == NULL);
1733                 rate_info = le16_to_cpu(tx_desc->rate_info);
1734                 /* If rate is < 6.5 Mpbs for an ht station
1735                  * do not form an ampdu. If the station is a
1736                  * legacy station (format = 0), do not form an
1737                  * ampdu
1738                  */
1739                 if (RI_RATE_ID_MCS(rate_info) < 1 ||
1740                     RI_FORMAT(rate_info) == 0) {
1741                     sta_info->is_ampdu_allowed = false;
1742                 } else {
1743                     sta_info->is_ampdu_allowed = true;
1744                 }
1745             }
1746             rcu_read_unlock();
1747         }
1748 
1749         ieee80211_tx_info_clear_status(info);
1750 
1751         /* Rate control is happening in the firmware.
1752          * Ensure no tx rate is being reported.
1753          */
1754         info->status.rates[0].idx = -1;
1755         info->status.rates[0].count = 1;
1756 
1757         if (MWL8K_TXD_SUCCESS(status))
1758             info->flags |= IEEE80211_TX_STAT_ACK;
1759 
1760         ieee80211_tx_status_irqsafe(hw, skb);
1761 
1762         processed++;
1763     }
1764 
1765     return processed;
1766 }
1767 
1768 /* must be called only when the card's transmit is completely halted */
1769 static void mwl8k_txq_deinit(struct ieee80211_hw *hw, int index)
1770 {
1771     struct mwl8k_priv *priv = hw->priv;
1772     struct mwl8k_tx_queue *txq = priv->txq + index;
1773 
1774     if (txq->txd == NULL)
1775         return;
1776 
1777     mwl8k_txq_reclaim(hw, index, INT_MAX, 1);
1778 
1779     kfree(txq->skb);
1780     txq->skb = NULL;
1781 
1782     dma_free_coherent(&priv->pdev->dev,
1783               MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc),
1784               txq->txd, txq->txd_dma);
1785     txq->txd = NULL;
1786 }
1787 
1788 /* caller must hold priv->stream_lock when calling the stream functions */
1789 static struct mwl8k_ampdu_stream *
1790 mwl8k_add_stream(struct ieee80211_hw *hw, struct ieee80211_sta *sta, u8 tid)
1791 {
1792     struct mwl8k_ampdu_stream *stream;
1793     struct mwl8k_priv *priv = hw->priv;
1794     int i;
1795 
1796     for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
1797         stream = &priv->ampdu[i];
1798         if (stream->state == AMPDU_NO_STREAM) {
1799             stream->sta = sta;
1800             stream->state = AMPDU_STREAM_NEW;
1801             stream->tid = tid;
1802             stream->idx = i;
1803             wiphy_debug(hw->wiphy, "Added a new stream for %pM %d",
1804                     sta->addr, tid);
1805             return stream;
1806         }
1807     }
1808     return NULL;
1809 }
1810 
1811 static int
1812 mwl8k_start_stream(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream)
1813 {
1814     int ret;
1815 
1816     /* if the stream has already been started, don't start it again */
1817     if (stream->state != AMPDU_STREAM_NEW)
1818         return 0;
1819     ret = ieee80211_start_tx_ba_session(stream->sta, stream->tid, 0);
1820     if (ret)
1821         wiphy_debug(hw->wiphy, "Failed to start stream for %pM %d: "
1822                 "%d\n", stream->sta->addr, stream->tid, ret);
1823     else
1824         wiphy_debug(hw->wiphy, "Started stream for %pM %d\n",
1825                 stream->sta->addr, stream->tid);
1826     return ret;
1827 }
1828 
1829 static void
1830 mwl8k_remove_stream(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream)
1831 {
1832     wiphy_debug(hw->wiphy, "Remove stream for %pM %d\n", stream->sta->addr,
1833             stream->tid);
1834     memset(stream, 0, sizeof(*stream));
1835 }
1836 
1837 static struct mwl8k_ampdu_stream *
1838 mwl8k_lookup_stream(struct ieee80211_hw *hw, u8 *addr, u8 tid)
1839 {
1840     struct mwl8k_priv *priv = hw->priv;
1841     int i;
1842 
1843     for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
1844         struct mwl8k_ampdu_stream *stream;
1845         stream = &priv->ampdu[i];
1846         if (stream->state == AMPDU_NO_STREAM)
1847             continue;
1848         if (!memcmp(stream->sta->addr, addr, ETH_ALEN) &&
1849             stream->tid == tid)
1850             return stream;
1851     }
1852     return NULL;
1853 }
1854 
1855 #define MWL8K_AMPDU_PACKET_THRESHOLD 64
1856 static inline bool mwl8k_ampdu_allowed(struct ieee80211_sta *sta, u8 tid)
1857 {
1858     struct mwl8k_sta *sta_info = MWL8K_STA(sta);
1859     struct tx_traffic_info *tx_stats;
1860 
1861     BUG_ON(tid >= MWL8K_MAX_TID);
1862     tx_stats = &sta_info->tx_stats[tid];
1863 
1864     return sta_info->is_ampdu_allowed &&
1865         tx_stats->pkts > MWL8K_AMPDU_PACKET_THRESHOLD;
1866 }
1867 
1868 static inline void mwl8k_tx_count_packet(struct ieee80211_sta *sta, u8 tid)
1869 {
1870     struct mwl8k_sta *sta_info = MWL8K_STA(sta);
1871     struct tx_traffic_info *tx_stats;
1872 
1873     BUG_ON(tid >= MWL8K_MAX_TID);
1874     tx_stats = &sta_info->tx_stats[tid];
1875 
1876     if (tx_stats->start_time == 0)
1877         tx_stats->start_time = jiffies;
1878 
1879     /* reset the packet count after each second elapses.  If the number of
1880      * packets ever exceeds the ampdu_min_traffic threshold, we will allow
1881      * an ampdu stream to be started.
1882      */
1883     if (time_after(jiffies, (unsigned long)tx_stats->start_time + HZ)) {
1884         tx_stats->pkts = 0;
1885         tx_stats->start_time = 0;
1886     } else
1887         tx_stats->pkts++;
1888 }
1889 
1890 /* The hardware ampdu queues start from 5.
1891  * txpriorities for ampdu queues are
1892  * 5 6 7 0 1 2 3 4 ie., queue 5 is highest
1893  * and queue 3 is lowest (queue 4 is reserved)
1894  */
1895 #define BA_QUEUE        5
1896 
1897 static void
1898 mwl8k_txq_xmit(struct ieee80211_hw *hw,
1899            int index,
1900            struct ieee80211_sta *sta,
1901            struct sk_buff *skb)
1902 {
1903     struct mwl8k_priv *priv = hw->priv;
1904     struct ieee80211_tx_info *tx_info;
1905     struct mwl8k_vif *mwl8k_vif;
1906     struct ieee80211_hdr *wh;
1907     struct mwl8k_tx_queue *txq;
1908     struct mwl8k_tx_desc *tx;
1909     dma_addr_t dma;
1910     u32 txstatus;
1911     u8 txdatarate;
1912     u16 qos;
1913     int txpriority;
1914     u8 tid = 0;
1915     struct mwl8k_ampdu_stream *stream = NULL;
1916     bool start_ba_session = false;
1917     bool mgmtframe = false;
1918     struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
1919     bool eapol_frame = false;
1920 
1921     wh = (struct ieee80211_hdr *)skb->data;
1922     if (ieee80211_is_data_qos(wh->frame_control))
1923         qos = le16_to_cpu(*((__le16 *)ieee80211_get_qos_ctl(wh)));
1924     else
1925         qos = 0;
1926 
1927     if (skb->protocol == cpu_to_be16(ETH_P_PAE))
1928         eapol_frame = true;
1929 
1930     if (ieee80211_is_mgmt(wh->frame_control))
1931         mgmtframe = true;
1932 
1933     if (priv->ap_fw)
1934         mwl8k_encapsulate_tx_frame(priv, skb);
1935     else
1936         mwl8k_add_dma_header(priv, skb, 0, 0);
1937 
1938     wh = &((struct mwl8k_dma_data *)skb->data)->wh;
1939 
1940     tx_info = IEEE80211_SKB_CB(skb);
1941     mwl8k_vif = MWL8K_VIF(tx_info->control.vif);
1942 
1943     if (tx_info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
1944         wh->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1945         wh->seq_ctrl |= cpu_to_le16(mwl8k_vif->seqno);
1946         mwl8k_vif->seqno += 0x10;
1947     }
1948 
1949     /* Setup firmware control bit fields for each frame type.  */
1950     txstatus = 0;
1951     txdatarate = 0;
1952     if (ieee80211_is_mgmt(wh->frame_control) ||
1953         ieee80211_is_ctl(wh->frame_control)) {
1954         txdatarate = 0;
1955         qos |= MWL8K_QOS_QLEN_UNSPEC | MWL8K_QOS_EOSP;
1956     } else if (ieee80211_is_data(wh->frame_control)) {
1957         txdatarate = 1;
1958         if (is_multicast_ether_addr(wh->addr1))
1959             txstatus |= MWL8K_TXD_STATUS_MULTICAST_TX;
1960 
1961         qos &= ~MWL8K_QOS_ACK_POLICY_MASK;
1962         if (tx_info->flags & IEEE80211_TX_CTL_AMPDU)
1963             qos |= MWL8K_QOS_ACK_POLICY_BLOCKACK;
1964         else
1965             qos |= MWL8K_QOS_ACK_POLICY_NORMAL;
1966     }
1967 
1968     /* Queue ADDBA request in the respective data queue.  While setting up
1969      * the ampdu stream, mac80211 queues further packets for that
1970      * particular ra/tid pair.  However, packets piled up in the hardware
1971      * for that ra/tid pair will still go out. ADDBA request and the
1972      * related data packets going out from different queues asynchronously
1973      * will cause a shift in the receiver window which might result in
1974      * ampdu packets getting dropped at the receiver after the stream has
1975      * been setup.
1976      */
1977     if (unlikely(ieee80211_is_action(wh->frame_control) &&
1978         mgmt->u.action.category == WLAN_CATEGORY_BACK &&
1979         mgmt->u.action.u.addba_req.action_code == WLAN_ACTION_ADDBA_REQ &&
1980         priv->ap_fw)) {
1981         u16 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1982         tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1983         index = mwl8k_tid_queue_mapping(tid);
1984     }
1985 
1986     txpriority = index;
1987 
1988     if (priv->ap_fw && sta && sta->deflink.ht_cap.ht_supported && !eapol_frame &&
1989         ieee80211_is_data_qos(wh->frame_control)) {
1990         tid = qos & 0xf;
1991         mwl8k_tx_count_packet(sta, tid);
1992         spin_lock(&priv->stream_lock);
1993         stream = mwl8k_lookup_stream(hw, sta->addr, tid);
1994         if (stream != NULL) {
1995             if (stream->state == AMPDU_STREAM_ACTIVE) {
1996                 WARN_ON(!(qos & MWL8K_QOS_ACK_POLICY_BLOCKACK));
1997                 txpriority = (BA_QUEUE + stream->idx) %
1998                          TOTAL_HW_TX_QUEUES;
1999                 if (stream->idx <= 1)
2000                     index = stream->idx +
2001                         MWL8K_TX_WMM_QUEUES;
2002 
2003             } else if (stream->state == AMPDU_STREAM_NEW) {
2004                 /* We get here if the driver sends us packets
2005                  * after we've initiated a stream, but before
2006                  * our ampdu_action routine has been called
2007                  * with IEEE80211_AMPDU_TX_START to get the SSN
2008                  * for the ADDBA request.  So this packet can
2009                  * go out with no risk of sequence number
2010                  * mismatch.  No special handling is required.
2011                  */
2012             } else {
2013                 /* Drop packets that would go out after the
2014                  * ADDBA request was sent but before the ADDBA
2015                  * response is received.  If we don't do this,
2016                  * the recipient would probably receive it
2017                  * after the ADDBA request with SSN 0.  This
2018                  * will cause the recipient's BA receive window
2019                  * to shift, which would cause the subsequent
2020                  * packets in the BA stream to be discarded.
2021                  * mac80211 queues our packets for us in this
2022                  * case, so this is really just a safety check.
2023                  */
2024                 wiphy_warn(hw->wiphy,
2025                        "Cannot send packet while ADDBA "
2026                        "dialog is underway.\n");
2027                 spin_unlock(&priv->stream_lock);
2028                 dev_kfree_skb(skb);
2029                 return;
2030             }
2031         } else {
2032             /* Defer calling mwl8k_start_stream so that the current
2033              * skb can go out before the ADDBA request.  This
2034              * prevents sequence number mismatch at the recepient
2035              * as described above.
2036              */
2037             if (mwl8k_ampdu_allowed(sta, tid)) {
2038                 stream = mwl8k_add_stream(hw, sta, tid);
2039                 if (stream != NULL)
2040                     start_ba_session = true;
2041             }
2042         }
2043         spin_unlock(&priv->stream_lock);
2044     } else {
2045         qos &= ~MWL8K_QOS_ACK_POLICY_MASK;
2046         qos |= MWL8K_QOS_ACK_POLICY_NORMAL;
2047     }
2048 
2049     dma = dma_map_single(&priv->pdev->dev, skb->data, skb->len,
2050                  DMA_TO_DEVICE);
2051 
2052     if (dma_mapping_error(&priv->pdev->dev, dma)) {
2053         wiphy_debug(hw->wiphy,
2054                 "failed to dma map skb, dropping TX frame.\n");
2055         if (start_ba_session) {
2056             spin_lock(&priv->stream_lock);
2057             mwl8k_remove_stream(hw, stream);
2058             spin_unlock(&priv->stream_lock);
2059         }
2060         dev_kfree_skb(skb);
2061         return;
2062     }
2063 
2064     spin_lock_bh(&priv->tx_lock);
2065 
2066     txq = priv->txq + index;
2067 
2068     /* Mgmt frames that go out frequently are probe
2069      * responses. Other mgmt frames got out relatively
2070      * infrequently. Hence reserve 2 buffers so that
2071      * other mgmt frames do not get dropped due to an
2072      * already queued probe response in one of the
2073      * reserved buffers.
2074      */
2075 
2076     if (txq->len >= MWL8K_TX_DESCS - 2) {
2077         if (!mgmtframe || txq->len == MWL8K_TX_DESCS) {
2078             if (start_ba_session) {
2079                 spin_lock(&priv->stream_lock);
2080                 mwl8k_remove_stream(hw, stream);
2081                 spin_unlock(&priv->stream_lock);
2082             }
2083             mwl8k_tx_start(priv);
2084             spin_unlock_bh(&priv->tx_lock);
2085             dma_unmap_single(&priv->pdev->dev, dma, skb->len,
2086                      DMA_TO_DEVICE);
2087             dev_kfree_skb(skb);
2088             return;
2089         }
2090     }
2091 
2092     BUG_ON(txq->skb[txq->tail] != NULL);
2093     txq->skb[txq->tail] = skb;
2094 
2095     tx = txq->txd + txq->tail;
2096     tx->data_rate = txdatarate;
2097     tx->tx_priority = txpriority;
2098     tx->qos_control = cpu_to_le16(qos);
2099     tx->pkt_phys_addr = cpu_to_le32(dma);
2100     tx->pkt_len = cpu_to_le16(skb->len);
2101     tx->rate_info = 0;
2102     if (!priv->ap_fw && sta != NULL)
2103         tx->peer_id = MWL8K_STA(sta)->peer_id;
2104     else
2105         tx->peer_id = 0;
2106 
2107     if (priv->ap_fw && ieee80211_is_data(wh->frame_control) && !eapol_frame)
2108         tx->timestamp = cpu_to_le32(ioread32(priv->regs +
2109                         MWL8K_HW_TIMER_REGISTER));
2110     else
2111         tx->timestamp = 0;
2112 
2113     wmb();
2114     tx->status = cpu_to_le32(MWL8K_TXD_STATUS_FW_OWNED | txstatus);
2115 
2116     txq->len++;
2117     priv->pending_tx_pkts++;
2118 
2119     txq->tail++;
2120     if (txq->tail == MWL8K_TX_DESCS)
2121         txq->tail = 0;
2122 
2123     mwl8k_tx_start(priv);
2124 
2125     spin_unlock_bh(&priv->tx_lock);
2126 
2127     /* Initiate the ampdu session here */
2128     if (start_ba_session) {
2129         spin_lock(&priv->stream_lock);
2130         if (mwl8k_start_stream(hw, stream))
2131             mwl8k_remove_stream(hw, stream);
2132         spin_unlock(&priv->stream_lock);
2133     }
2134 }
2135 
2136 
2137 /*
2138  * Firmware access.
2139  *
2140  * We have the following requirements for issuing firmware commands:
2141  * - Some commands require that the packet transmit path is idle when
2142  *   the command is issued.  (For simplicity, we'll just quiesce the
2143  *   transmit path for every command.)
2144  * - There are certain sequences of commands that need to be issued to
2145  *   the hardware sequentially, with no other intervening commands.
2146  *
2147  * This leads to an implementation of a "firmware lock" as a mutex that
2148  * can be taken recursively, and which is taken by both the low-level
2149  * command submission function (mwl8k_post_cmd) as well as any users of
2150  * that function that require issuing of an atomic sequence of commands,
2151  * and quiesces the transmit path whenever it's taken.
2152  */
2153 static int mwl8k_fw_lock(struct ieee80211_hw *hw)
2154 {
2155     struct mwl8k_priv *priv = hw->priv;
2156 
2157     if (priv->fw_mutex_owner != current) {
2158         int rc;
2159 
2160         mutex_lock(&priv->fw_mutex);
2161         ieee80211_stop_queues(hw);
2162 
2163         rc = mwl8k_tx_wait_empty(hw);
2164         if (rc) {
2165             if (!priv->hw_restart_in_progress)
2166                 ieee80211_wake_queues(hw);
2167 
2168             mutex_unlock(&priv->fw_mutex);
2169 
2170             return rc;
2171         }
2172 
2173         priv->fw_mutex_owner = current;
2174     }
2175 
2176     priv->fw_mutex_depth++;
2177 
2178     return 0;
2179 }
2180 
2181 static void mwl8k_fw_unlock(struct ieee80211_hw *hw)
2182 {
2183     struct mwl8k_priv *priv = hw->priv;
2184 
2185     if (!--priv->fw_mutex_depth) {
2186         if (!priv->hw_restart_in_progress)
2187             ieee80211_wake_queues(hw);
2188 
2189         priv->fw_mutex_owner = NULL;
2190         mutex_unlock(&priv->fw_mutex);
2191     }
2192 }
2193 
2194 static void mwl8k_enable_bsses(struct ieee80211_hw *hw, bool enable,
2195                    u32 bitmap);
2196 
2197 /*
2198  * Command processing.
2199  */
2200 
2201 /* Timeout firmware commands after 10s */
2202 #define MWL8K_CMD_TIMEOUT_MS    10000
2203 
2204 static int mwl8k_post_cmd(struct ieee80211_hw *hw, struct mwl8k_cmd_pkt *cmd)
2205 {
2206     DECLARE_COMPLETION_ONSTACK(cmd_wait);
2207     struct mwl8k_priv *priv = hw->priv;
2208     void __iomem *regs = priv->regs;
2209     dma_addr_t dma_addr;
2210     unsigned int dma_size;
2211     int rc;
2212     unsigned long timeout = 0;
2213     u8 buf[32];
2214     u32 bitmap = 0;
2215 
2216     wiphy_dbg(hw->wiphy, "Posting %s [%d]\n",
2217           mwl8k_cmd_name(cmd->code, buf, sizeof(buf)), cmd->macid);
2218 
2219     /* Before posting firmware commands that could change the hardware
2220      * characteristics, make sure that all BSSes are stopped temporary.
2221      * Enable these stopped BSSes after completion of the commands
2222      */
2223 
2224     rc = mwl8k_fw_lock(hw);
2225     if (rc)
2226         return rc;
2227 
2228     if (priv->ap_fw && priv->running_bsses) {
2229         switch (le16_to_cpu(cmd->code)) {
2230         case MWL8K_CMD_SET_RF_CHANNEL:
2231         case MWL8K_CMD_RADIO_CONTROL:
2232         case MWL8K_CMD_RF_TX_POWER:
2233         case MWL8K_CMD_TX_POWER:
2234         case MWL8K_CMD_RF_ANTENNA:
2235         case MWL8K_CMD_RTS_THRESHOLD:
2236         case MWL8K_CMD_MIMO_CONFIG:
2237             bitmap = priv->running_bsses;
2238             mwl8k_enable_bsses(hw, false, bitmap);
2239             break;
2240         }
2241     }
2242 
2243     cmd->result = (__force __le16) 0xffff;
2244     dma_size = le16_to_cpu(cmd->length);
2245     dma_addr = dma_map_single(&priv->pdev->dev, cmd, dma_size,
2246                   DMA_BIDIRECTIONAL);
2247     if (dma_mapping_error(&priv->pdev->dev, dma_addr)) {
2248         rc = -ENOMEM;
2249         goto exit;
2250     }
2251 
2252     priv->hostcmd_wait = &cmd_wait;
2253     iowrite32(dma_addr, regs + MWL8K_HIU_GEN_PTR);
2254     iowrite32(MWL8K_H2A_INT_DOORBELL,
2255         regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
2256     iowrite32(MWL8K_H2A_INT_DUMMY,
2257         regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
2258 
2259     timeout = wait_for_completion_timeout(&cmd_wait,
2260                 msecs_to_jiffies(MWL8K_CMD_TIMEOUT_MS));
2261 
2262     priv->hostcmd_wait = NULL;
2263 
2264 
2265     dma_unmap_single(&priv->pdev->dev, dma_addr, dma_size,
2266              DMA_BIDIRECTIONAL);
2267 
2268     if (!timeout) {
2269         wiphy_err(hw->wiphy, "Command %s timeout after %u ms\n",
2270               mwl8k_cmd_name(cmd->code, buf, sizeof(buf)),
2271               MWL8K_CMD_TIMEOUT_MS);
2272         rc = -ETIMEDOUT;
2273     } else {
2274         int ms;
2275 
2276         ms = MWL8K_CMD_TIMEOUT_MS - jiffies_to_msecs(timeout);
2277 
2278         rc = cmd->result ? -EINVAL : 0;
2279         if (rc)
2280             wiphy_err(hw->wiphy, "Command %s error 0x%x\n",
2281                   mwl8k_cmd_name(cmd->code, buf, sizeof(buf)),
2282                   le16_to_cpu(cmd->result));
2283         else if (ms > 2000)
2284             wiphy_notice(hw->wiphy, "Command %s took %d ms\n",
2285                      mwl8k_cmd_name(cmd->code,
2286                             buf, sizeof(buf)),
2287                      ms);
2288     }
2289 
2290 exit:
2291     if (bitmap)
2292         mwl8k_enable_bsses(hw, true, bitmap);
2293 
2294     mwl8k_fw_unlock(hw);
2295 
2296     return rc;
2297 }
2298 
2299 static int mwl8k_post_pervif_cmd(struct ieee80211_hw *hw,
2300                  struct ieee80211_vif *vif,
2301                  struct mwl8k_cmd_pkt *cmd)
2302 {
2303     if (vif != NULL)
2304         cmd->macid = MWL8K_VIF(vif)->macid;
2305     return mwl8k_post_cmd(hw, cmd);
2306 }
2307 
2308 /*
2309  * Setup code shared between STA and AP firmware images.
2310  */
2311 static void mwl8k_setup_2ghz_band(struct ieee80211_hw *hw)
2312 {
2313     struct mwl8k_priv *priv = hw->priv;
2314 
2315     BUILD_BUG_ON(sizeof(priv->channels_24) != sizeof(mwl8k_channels_24));
2316     memcpy(priv->channels_24, mwl8k_channels_24, sizeof(mwl8k_channels_24));
2317 
2318     BUILD_BUG_ON(sizeof(priv->rates_24) != sizeof(mwl8k_rates_24));
2319     memcpy(priv->rates_24, mwl8k_rates_24, sizeof(mwl8k_rates_24));
2320 
2321     priv->band_24.band = NL80211_BAND_2GHZ;
2322     priv->band_24.channels = priv->channels_24;
2323     priv->band_24.n_channels = ARRAY_SIZE(mwl8k_channels_24);
2324     priv->band_24.bitrates = priv->rates_24;
2325     priv->band_24.n_bitrates = ARRAY_SIZE(mwl8k_rates_24);
2326 
2327     hw->wiphy->bands[NL80211_BAND_2GHZ] = &priv->band_24;
2328 }
2329 
2330 static void mwl8k_setup_5ghz_band(struct ieee80211_hw *hw)
2331 {
2332     struct mwl8k_priv *priv = hw->priv;
2333 
2334     BUILD_BUG_ON(sizeof(priv->channels_50) != sizeof(mwl8k_channels_50));
2335     memcpy(priv->channels_50, mwl8k_channels_50, sizeof(mwl8k_channels_50));
2336 
2337     BUILD_BUG_ON(sizeof(priv->rates_50) != sizeof(mwl8k_rates_50));
2338     memcpy(priv->rates_50, mwl8k_rates_50, sizeof(mwl8k_rates_50));
2339 
2340     priv->band_50.band = NL80211_BAND_5GHZ;
2341     priv->band_50.channels = priv->channels_50;
2342     priv->band_50.n_channels = ARRAY_SIZE(mwl8k_channels_50);
2343     priv->band_50.bitrates = priv->rates_50;
2344     priv->band_50.n_bitrates = ARRAY_SIZE(mwl8k_rates_50);
2345 
2346     hw->wiphy->bands[NL80211_BAND_5GHZ] = &priv->band_50;
2347 }
2348 
2349 /*
2350  * CMD_GET_HW_SPEC (STA version).
2351  */
2352 struct mwl8k_cmd_get_hw_spec_sta {
2353     struct mwl8k_cmd_pkt header;
2354     __u8 hw_rev;
2355     __u8 host_interface;
2356     __le16 num_mcaddrs;
2357     __u8 perm_addr[ETH_ALEN];
2358     __le16 region_code;
2359     __le32 fw_rev;
2360     __le32 ps_cookie;
2361     __le32 caps;
2362     __u8 mcs_bitmap[16];
2363     __le32 rx_queue_ptr;
2364     __le32 num_tx_queues;
2365     __le32 tx_queue_ptrs[MWL8K_TX_WMM_QUEUES];
2366     __le32 caps2;
2367     __le32 num_tx_desc_per_queue;
2368     __le32 total_rxd;
2369 } __packed;
2370 
2371 #define MWL8K_CAP_MAX_AMSDU     0x20000000
2372 #define MWL8K_CAP_GREENFIELD        0x08000000
2373 #define MWL8K_CAP_AMPDU         0x04000000
2374 #define MWL8K_CAP_RX_STBC       0x01000000
2375 #define MWL8K_CAP_TX_STBC       0x00800000
2376 #define MWL8K_CAP_SHORTGI_40MHZ     0x00400000
2377 #define MWL8K_CAP_SHORTGI_20MHZ     0x00200000
2378 #define MWL8K_CAP_RX_ANTENNA_MASK   0x000e0000
2379 #define MWL8K_CAP_TX_ANTENNA_MASK   0x0001c000
2380 #define MWL8K_CAP_DELAY_BA      0x00003000
2381 #define MWL8K_CAP_MIMO          0x00000200
2382 #define MWL8K_CAP_40MHZ         0x00000100
2383 #define MWL8K_CAP_BAND_MASK     0x00000007
2384 #define MWL8K_CAP_5GHZ          0x00000004
2385 #define MWL8K_CAP_2GHZ4         0x00000001
2386 
2387 static void
2388 mwl8k_set_ht_caps(struct ieee80211_hw *hw,
2389           struct ieee80211_supported_band *band, u32 cap)
2390 {
2391     int rx_streams;
2392     int tx_streams;
2393 
2394     band->ht_cap.ht_supported = 1;
2395 
2396     if (cap & MWL8K_CAP_MAX_AMSDU)
2397         band->ht_cap.cap |= IEEE80211_HT_CAP_MAX_AMSDU;
2398     if (cap & MWL8K_CAP_GREENFIELD)
2399         band->ht_cap.cap |= IEEE80211_HT_CAP_GRN_FLD;
2400     if (cap & MWL8K_CAP_AMPDU) {
2401         ieee80211_hw_set(hw, AMPDU_AGGREGATION);
2402         band->ht_cap.ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
2403         band->ht_cap.ampdu_density = IEEE80211_HT_MPDU_DENSITY_NONE;
2404     }
2405     if (cap & MWL8K_CAP_RX_STBC)
2406         band->ht_cap.cap |= IEEE80211_HT_CAP_RX_STBC;
2407     if (cap & MWL8K_CAP_TX_STBC)
2408         band->ht_cap.cap |= IEEE80211_HT_CAP_TX_STBC;
2409     if (cap & MWL8K_CAP_SHORTGI_40MHZ)
2410         band->ht_cap.cap |= IEEE80211_HT_CAP_SGI_40;
2411     if (cap & MWL8K_CAP_SHORTGI_20MHZ)
2412         band->ht_cap.cap |= IEEE80211_HT_CAP_SGI_20;
2413     if (cap & MWL8K_CAP_DELAY_BA)
2414         band->ht_cap.cap |= IEEE80211_HT_CAP_DELAY_BA;
2415     if (cap & MWL8K_CAP_40MHZ)
2416         band->ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2417 
2418     rx_streams = hweight32(cap & MWL8K_CAP_RX_ANTENNA_MASK);
2419     tx_streams = hweight32(cap & MWL8K_CAP_TX_ANTENNA_MASK);
2420 
2421     band->ht_cap.mcs.rx_mask[0] = 0xff;
2422     if (rx_streams >= 2)
2423         band->ht_cap.mcs.rx_mask[1] = 0xff;
2424     if (rx_streams >= 3)
2425         band->ht_cap.mcs.rx_mask[2] = 0xff;
2426     band->ht_cap.mcs.rx_mask[4] = 0x01;
2427     band->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
2428 
2429     if (rx_streams != tx_streams) {
2430         band->ht_cap.mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
2431         band->ht_cap.mcs.tx_params |= (tx_streams - 1) <<
2432                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
2433     }
2434 }
2435 
2436 static void
2437 mwl8k_set_caps(struct ieee80211_hw *hw, u32 caps)
2438 {
2439     struct mwl8k_priv *priv = hw->priv;
2440 
2441     if (priv->caps)
2442         return;
2443 
2444     if ((caps & MWL8K_CAP_2GHZ4) || !(caps & MWL8K_CAP_BAND_MASK)) {
2445         mwl8k_setup_2ghz_band(hw);
2446         if (caps & MWL8K_CAP_MIMO)
2447             mwl8k_set_ht_caps(hw, &priv->band_24, caps);
2448     }
2449 
2450     if (caps & MWL8K_CAP_5GHZ) {
2451         mwl8k_setup_5ghz_band(hw);
2452         if (caps & MWL8K_CAP_MIMO)
2453             mwl8k_set_ht_caps(hw, &priv->band_50, caps);
2454     }
2455 
2456     priv->caps = caps;
2457 }
2458 
2459 static int mwl8k_cmd_get_hw_spec_sta(struct ieee80211_hw *hw)
2460 {
2461     struct mwl8k_priv *priv = hw->priv;
2462     struct mwl8k_cmd_get_hw_spec_sta *cmd;
2463     int rc;
2464     int i;
2465 
2466     cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2467     if (cmd == NULL)
2468         return -ENOMEM;
2469 
2470     cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_HW_SPEC);
2471     cmd->header.length = cpu_to_le16(sizeof(*cmd));
2472 
2473     memset(cmd->perm_addr, 0xff, sizeof(cmd->perm_addr));
2474     cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
2475     cmd->rx_queue_ptr = cpu_to_le32(priv->rxq[0].rxd_dma);
2476     cmd->num_tx_queues = cpu_to_le32(mwl8k_tx_queues(priv));
2477     for (i = 0; i < mwl8k_tx_queues(priv); i++)
2478         cmd->tx_queue_ptrs[i] = cpu_to_le32(priv->txq[i].txd_dma);
2479     cmd->num_tx_desc_per_queue = cpu_to_le32(MWL8K_TX_DESCS);
2480     cmd->total_rxd = cpu_to_le32(MWL8K_RX_DESCS);
2481 
2482     rc = mwl8k_post_cmd(hw, &cmd->header);
2483 
2484     if (!rc) {
2485         SET_IEEE80211_PERM_ADDR(hw, cmd->perm_addr);
2486         priv->num_mcaddrs = le16_to_cpu(cmd->num_mcaddrs);
2487         priv->fw_rev = le32_to_cpu(cmd->fw_rev);
2488         priv->hw_rev = cmd->hw_rev;
2489         mwl8k_set_caps(hw, le32_to_cpu(cmd->caps));
2490         priv->ap_macids_supported = 0x00000000;
2491         priv->sta_macids_supported = 0x00000001;
2492     }
2493 
2494     kfree(cmd);
2495     return rc;
2496 }
2497 
2498 /*
2499  * CMD_GET_HW_SPEC (AP version).
2500  */
2501 struct mwl8k_cmd_get_hw_spec_ap {
2502     struct mwl8k_cmd_pkt header;
2503     __u8 hw_rev;
2504     __u8 host_interface;
2505     __le16 num_wcb;
2506     __le16 num_mcaddrs;
2507     __u8 perm_addr[ETH_ALEN];
2508     __le16 region_code;
2509     __le16 num_antenna;
2510     __le32 fw_rev;
2511     __le32 wcbbase0;
2512     __le32 rxwrptr;
2513     __le32 rxrdptr;
2514     __le32 ps_cookie;
2515     __le32 wcbbase1;
2516     __le32 wcbbase2;
2517     __le32 wcbbase3;
2518     __le32 fw_api_version;
2519     __le32 caps;
2520     __le32 num_of_ampdu_queues;
2521     __le32 wcbbase_ampdu[MWL8K_MAX_AMPDU_QUEUES];
2522 } __packed;
2523 
2524 static int mwl8k_cmd_get_hw_spec_ap(struct ieee80211_hw *hw)
2525 {
2526     struct mwl8k_priv *priv = hw->priv;
2527     struct mwl8k_cmd_get_hw_spec_ap *cmd;
2528     int rc, i;
2529     u32 api_version;
2530 
2531     cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2532     if (cmd == NULL)
2533         return -ENOMEM;
2534 
2535     cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_HW_SPEC);
2536     cmd->header.length = cpu_to_le16(sizeof(*cmd));
2537 
2538     memset(cmd->perm_addr, 0xff, sizeof(cmd->perm_addr));
2539     cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
2540 
2541     rc = mwl8k_post_cmd(hw, &cmd->header);
2542 
2543     if (!rc) {
2544         int off;
2545 
2546         api_version = le32_to_cpu(cmd->fw_api_version);
2547         if (priv->device_info->fw_api_ap != api_version) {
2548             printk(KERN_ERR "%s: Unsupported fw API version for %s."
2549                    "  Expected %d got %d.\n", MWL8K_NAME,
2550                    priv->device_info->part_name,
2551                    priv->device_info->fw_api_ap,
2552                    api_version);
2553             rc = -EINVAL;
2554             goto done;
2555         }
2556         SET_IEEE80211_PERM_ADDR(hw, cmd->perm_addr);
2557         priv->num_mcaddrs = le16_to_cpu(cmd->num_mcaddrs);
2558         priv->fw_rev = le32_to_cpu(cmd->fw_rev);
2559         priv->hw_rev = cmd->hw_rev;
2560         mwl8k_set_caps(hw, le32_to_cpu(cmd->caps));
2561         priv->ap_macids_supported = 0x000000ff;
2562         priv->sta_macids_supported = 0x00000100;
2563         priv->num_ampdu_queues = le32_to_cpu(cmd->num_of_ampdu_queues);
2564         if (priv->num_ampdu_queues > MWL8K_MAX_AMPDU_QUEUES) {
2565             wiphy_warn(hw->wiphy, "fw reported %d ampdu queues"
2566                    " but we only support %d.\n",
2567                    priv->num_ampdu_queues,
2568                    MWL8K_MAX_AMPDU_QUEUES);
2569             priv->num_ampdu_queues = MWL8K_MAX_AMPDU_QUEUES;
2570         }
2571         off = le32_to_cpu(cmd->rxwrptr) & 0xffff;
2572         iowrite32(priv->rxq[0].rxd_dma, priv->sram + off);
2573 
2574         off = le32_to_cpu(cmd->rxrdptr) & 0xffff;
2575         iowrite32(priv->rxq[0].rxd_dma, priv->sram + off);
2576 
2577         priv->txq_offset[0] = le32_to_cpu(cmd->wcbbase0) & 0xffff;
2578         priv->txq_offset[1] = le32_to_cpu(cmd->wcbbase1) & 0xffff;
2579         priv->txq_offset[2] = le32_to_cpu(cmd->wcbbase2) & 0xffff;
2580         priv->txq_offset[3] = le32_to_cpu(cmd->wcbbase3) & 0xffff;
2581 
2582         for (i = 0; i < priv->num_ampdu_queues; i++)
2583             priv->txq_offset[i + MWL8K_TX_WMM_QUEUES] =
2584                 le32_to_cpu(cmd->wcbbase_ampdu[i]) & 0xffff;
2585     }
2586 
2587 done:
2588     kfree(cmd);
2589     return rc;
2590 }
2591 
2592 /*
2593  * CMD_SET_HW_SPEC.
2594  */
2595 struct mwl8k_cmd_set_hw_spec {
2596     struct mwl8k_cmd_pkt header;
2597     __u8 hw_rev;
2598     __u8 host_interface;
2599     __le16 num_mcaddrs;
2600     __u8 perm_addr[ETH_ALEN];
2601     __le16 region_code;
2602     __le32 fw_rev;
2603     __le32 ps_cookie;
2604     __le32 caps;
2605     __le32 rx_queue_ptr;
2606     __le32 num_tx_queues;
2607     __le32 tx_queue_ptrs[MWL8K_MAX_TX_QUEUES];
2608     __le32 flags;
2609     __le32 num_tx_desc_per_queue;
2610     __le32 total_rxd;
2611 } __packed;
2612 
2613 /* If enabled, MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY will cause
2614  * packets to expire 500 ms after the timestamp in the tx descriptor.  That is,
2615  * the packets that are queued for more than 500ms, will be dropped in the
2616  * hardware. This helps minimizing the issues caused due to head-of-line
2617  * blocking where a slow client can hog the bandwidth and affect traffic to a
2618  * faster client.
2619  */
2620 #define MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY  0x00000400
2621 #define MWL8K_SET_HW_SPEC_FLAG_GENERATE_CCMP_HDR    0x00000200
2622 #define MWL8K_SET_HW_SPEC_FLAG_HOST_DECR_MGMT       0x00000080
2623 #define MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_PROBERESP   0x00000020
2624 #define MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_BEACON      0x00000010
2625 
2626 static int mwl8k_cmd_set_hw_spec(struct ieee80211_hw *hw)
2627 {
2628     struct mwl8k_priv *priv = hw->priv;
2629     struct mwl8k_cmd_set_hw_spec *cmd;
2630     int rc;
2631     int i;
2632 
2633     cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2634     if (cmd == NULL)
2635         return -ENOMEM;
2636 
2637     cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_HW_SPEC);
2638     cmd->header.length = cpu_to_le16(sizeof(*cmd));
2639 
2640     cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
2641     cmd->rx_queue_ptr = cpu_to_le32(priv->rxq[0].rxd_dma);
2642     cmd->num_tx_queues = cpu_to_le32(mwl8k_tx_queues(priv));
2643 
2644     /*
2645      * Mac80211 stack has Q0 as highest priority and Q3 as lowest in
2646      * that order. Firmware has Q3 as highest priority and Q0 as lowest
2647      * in that order. Map Q3 of mac80211 to Q0 of firmware so that the
2648      * priority is interpreted the right way in firmware.
2649      */
2650     for (i = 0; i < mwl8k_tx_queues(priv); i++) {
2651         int j = mwl8k_tx_queues(priv) - 1 - i;
2652         cmd->tx_queue_ptrs[i] = cpu_to_le32(priv->txq[j].txd_dma);
2653     }
2654 
2655     cmd->flags = cpu_to_le32(MWL8K_SET_HW_SPEC_FLAG_HOST_DECR_MGMT |
2656                  MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_PROBERESP |
2657                  MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_BEACON |
2658                  MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY |
2659                  MWL8K_SET_HW_SPEC_FLAG_GENERATE_CCMP_HDR);
2660     cmd->num_tx_desc_per_queue = cpu_to_le32(MWL8K_TX_DESCS);
2661     cmd->total_rxd = cpu_to_le32(MWL8K_RX_DESCS);
2662 
2663     rc = mwl8k_post_cmd(hw, &cmd->header);
2664     kfree(cmd);
2665 
2666     return rc;
2667 }
2668 
2669 /*
2670  * CMD_MAC_MULTICAST_ADR.
2671  */
2672 struct mwl8k_cmd_mac_multicast_adr {
2673     struct mwl8k_cmd_pkt header;
2674     __le16 action;
2675     __le16 numaddr;
2676     __u8 addr[][ETH_ALEN];
2677 };
2678 
2679 #define MWL8K_ENABLE_RX_DIRECTED    0x0001
2680 #define MWL8K_ENABLE_RX_MULTICAST   0x0002
2681 #define MWL8K_ENABLE_RX_ALL_MULTICAST   0x0004
2682 #define MWL8K_ENABLE_RX_BROADCAST   0x0008
2683 
2684 static struct mwl8k_cmd_pkt *
2685 __mwl8k_cmd_mac_multicast_adr(struct ieee80211_hw *hw, int allmulti,
2686                   struct netdev_hw_addr_list *mc_list)
2687 {
2688     struct mwl8k_priv *priv = hw->priv;
2689     struct mwl8k_cmd_mac_multicast_adr *cmd;
2690     int size;
2691     int mc_count = 0;
2692 
2693     if (mc_list)
2694         mc_count = netdev_hw_addr_list_count(mc_list);
2695 
2696     if (allmulti || mc_count > priv->num_mcaddrs) {
2697         allmulti = 1;
2698         mc_count = 0;
2699     }
2700 
2701     size = sizeof(*cmd) + mc_count * ETH_ALEN;
2702 
2703     cmd = kzalloc(size, GFP_ATOMIC);
2704     if (cmd == NULL)
2705         return NULL;
2706 
2707     cmd->header.code = cpu_to_le16(MWL8K_CMD_MAC_MULTICAST_ADR);
2708     cmd->header.length = cpu_to_le16(size);
2709     cmd->action = cpu_to_le16(MWL8K_ENABLE_RX_DIRECTED |
2710                   MWL8K_ENABLE_RX_BROADCAST);
2711 
2712     if (allmulti) {
2713         cmd->action |= cpu_to_le16(MWL8K_ENABLE_RX_ALL_MULTICAST);
2714     } else if (mc_count) {
2715         struct netdev_hw_addr *ha;
2716         int i = 0;
2717 
2718         cmd->action |= cpu_to_le16(MWL8K_ENABLE_RX_MULTICAST);
2719         cmd->numaddr = cpu_to_le16(mc_count);
2720         netdev_hw_addr_list_for_each(ha, mc_list) {
2721             memcpy(cmd->addr[i], ha->addr, ETH_ALEN);
2722         }
2723     }
2724 
2725     return &cmd->header;
2726 }
2727 
2728 /*
2729  * CMD_GET_STAT.
2730  */
2731 struct mwl8k_cmd_get_stat {
2732     struct mwl8k_cmd_pkt header;
2733     __le32 stats[64];
2734 } __packed;
2735 
2736 #define MWL8K_STAT_ACK_FAILURE  9
2737 #define MWL8K_STAT_RTS_FAILURE  12
2738 #define MWL8K_STAT_FCS_ERROR    24
2739 #define MWL8K_STAT_RTS_SUCCESS  11
2740 
2741 static int mwl8k_cmd_get_stat(struct ieee80211_hw *hw,
2742                   struct ieee80211_low_level_stats *stats)
2743 {
2744     struct mwl8k_cmd_get_stat *cmd;
2745     int rc;
2746 
2747     cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2748     if (cmd == NULL)
2749         return -ENOMEM;
2750 
2751     cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_STAT);
2752     cmd->header.length = cpu_to_le16(sizeof(*cmd));
2753 
2754     rc = mwl8k_post_cmd(hw, &cmd->header);
2755     if (!rc) {
2756         stats->dot11ACKFailureCount =
2757             le32_to_cpu(cmd->stats[MWL8K_STAT_ACK_FAILURE]);
2758         stats->dot11RTSFailureCount =
2759             le32_to_cpu(cmd->stats[MWL8K_STAT_RTS_FAILURE]);
2760         stats->dot11FCSErrorCount =
2761             le32_to_cpu(cmd->stats[MWL8K_STAT_FCS_ERROR]);
2762         stats->dot11RTSSuccessCount =
2763             le32_to_cpu(cmd->stats[MWL8K_STAT_RTS_SUCCESS]);
2764     }
2765     kfree(cmd);
2766 
2767     return rc;
2768 }
2769 
2770 /*
2771  * CMD_RADIO_CONTROL.
2772  */
2773 struct mwl8k_cmd_radio_control {
2774     struct mwl8k_cmd_pkt header;
2775     __le16 action;
2776     __le16 control;
2777     __le16 radio_on;
2778 } __packed;
2779 
2780 static int
2781 mwl8k_cmd_radio_control(struct ieee80211_hw *hw, bool enable, bool force)
2782 {
2783     struct mwl8k_priv *priv = hw->priv;
2784     struct mwl8k_cmd_radio_control *cmd;
2785     int rc;
2786 
2787     if (enable == priv->radio_on && !force)
2788         return 0;
2789 
2790     cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2791     if (cmd == NULL)
2792         return -ENOMEM;
2793 
2794     cmd->header.code = cpu_to_le16(MWL8K_CMD_RADIO_CONTROL);
2795     cmd->header.length = cpu_to_le16(sizeof(*cmd));
2796     cmd->action = cpu_to_le16(MWL8K_CMD_SET);
2797     cmd->control = cpu_to_le16(priv->radio_short_preamble ? 3 : 1);
2798     cmd->radio_on = cpu_to_le16(enable ? 0x0001 : 0x0000);
2799 
2800     rc = mwl8k_post_cmd(hw, &cmd->header);
2801     kfree(cmd);
2802 
2803     if (!rc)
2804         priv->radio_on = enable;
2805 
2806     return rc;
2807 }
2808 
2809 static int mwl8k_cmd_radio_disable(struct ieee80211_hw *hw)
2810 {
2811     return mwl8k_cmd_radio_control(hw, 0, 0);
2812 }
2813 
2814 static int mwl8k_cmd_radio_enable(struct ieee80211_hw *hw)
2815 {
2816     return mwl8k_cmd_radio_control(hw, 1, 0);
2817 }
2818 
2819 static int
2820 mwl8k_set_radio_preamble(struct ieee80211_hw *hw, bool short_preamble)
2821 {
2822     struct mwl8k_priv *priv = hw->priv;
2823 
2824     priv->radio_short_preamble = short_preamble;
2825 
2826     return mwl8k_cmd_radio_control(hw, 1, 1);
2827 }
2828 
2829 /*
2830  * CMD_RF_TX_POWER.
2831  */
2832 #define MWL8K_RF_TX_POWER_LEVEL_TOTAL   8
2833 
2834 struct mwl8k_cmd_rf_tx_power {
2835     struct mwl8k_cmd_pkt header;
2836     __le16 action;
2837     __le16 support_level;
2838     __le16 current_level;
2839     __le16 reserved;
2840     __le16 power_level_list[MWL8K_RF_TX_POWER_LEVEL_TOTAL];
2841 } __packed;
2842 
2843 static int mwl8k_cmd_rf_tx_power(struct ieee80211_hw *hw, int dBm)
2844 {
2845     struct mwl8k_cmd_rf_tx_power *cmd;
2846     int rc;
2847 
2848     cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2849     if (cmd == NULL)
2850         return -ENOMEM;
2851 
2852     cmd->header.code = cpu_to_le16(MWL8K_CMD_RF_TX_POWER);
2853     cmd->header.length = cpu_to_le16(sizeof(*cmd));
2854     cmd->action = cpu_to_le16(MWL8K_CMD_SET);
2855     cmd->support_level = cpu_to_le16(dBm);
2856 
2857     rc = mwl8k_post_cmd(hw, &cmd->header);
2858     kfree(cmd);
2859 
2860     return rc;
2861 }
2862 
2863 /*
2864  * CMD_TX_POWER.
2865  */
2866 #define MWL8K_TX_POWER_LEVEL_TOTAL      12
2867 
2868 struct mwl8k_cmd_tx_power {
2869     struct mwl8k_cmd_pkt header;
2870     __le16 action;
2871     __le16 band;
2872     __le16 channel;
2873     __le16 bw;
2874     __le16 sub_ch;
2875     __le16 power_level_list[MWL8K_TX_POWER_LEVEL_TOTAL];
2876 } __packed;
2877 
2878 static int mwl8k_cmd_tx_power(struct ieee80211_hw *hw,
2879                      struct ieee80211_conf *conf,
2880                      unsigned short pwr)
2881 {
2882     struct ieee80211_channel *channel = conf->chandef.chan;
2883     enum nl80211_channel_type channel_type =
2884         cfg80211_get_chandef_type(&conf->chandef);
2885     struct mwl8k_cmd_tx_power *cmd;
2886     int rc;
2887     int i;
2888 
2889     cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2890     if (cmd == NULL)
2891         return -ENOMEM;
2892 
2893     cmd->header.code = cpu_to_le16(MWL8K_CMD_TX_POWER);
2894     cmd->header.length = cpu_to_le16(sizeof(*cmd));
2895     cmd->action = cpu_to_le16(MWL8K_CMD_SET_LIST);
2896 
2897     if (channel->band == NL80211_BAND_2GHZ)
2898         cmd->band = cpu_to_le16(0x1);
2899     else if (channel->band == NL80211_BAND_5GHZ)
2900         cmd->band = cpu_to_le16(0x4);
2901 
2902     cmd->channel = cpu_to_le16(channel->hw_value);
2903 
2904     if (channel_type == NL80211_CHAN_NO_HT ||
2905         channel_type == NL80211_CHAN_HT20) {
2906         cmd->bw = cpu_to_le16(0x2);
2907     } else {
2908         cmd->bw = cpu_to_le16(0x4);
2909         if (channel_type == NL80211_CHAN_HT40MINUS)
2910             cmd->sub_ch = cpu_to_le16(0x3);
2911         else if (channel_type == NL80211_CHAN_HT40PLUS)
2912             cmd->sub_ch = cpu_to_le16(0x1);
2913     }
2914 
2915     for (i = 0; i < MWL8K_TX_POWER_LEVEL_TOTAL; i++)
2916         cmd->power_level_list[i] = cpu_to_le16(pwr);
2917 
2918     rc = mwl8k_post_cmd(hw, &cmd->header);
2919     kfree(cmd);
2920 
2921     return rc;
2922 }
2923 
2924 /*
2925  * CMD_RF_ANTENNA.
2926  */
2927 struct mwl8k_cmd_rf_antenna {
2928     struct mwl8k_cmd_pkt header;
2929     __le16 antenna;
2930     __le16 mode;
2931 } __packed;
2932 
2933 #define MWL8K_RF_ANTENNA_RX     1
2934 #define MWL8K_RF_ANTENNA_TX     2
2935 
2936 static int
2937 mwl8k_cmd_rf_antenna(struct ieee80211_hw *hw, int antenna, int mask)
2938 {
2939     struct mwl8k_cmd_rf_antenna *cmd;
2940     int rc;
2941 
2942     cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2943     if (cmd == NULL)
2944         return -ENOMEM;
2945 
2946     cmd->header.code = cpu_to_le16(MWL8K_CMD_RF_ANTENNA);
2947     cmd->header.length = cpu_to_le16(sizeof(*cmd));
2948     cmd->antenna = cpu_to_le16(antenna);
2949     cmd->mode = cpu_to_le16(mask);
2950 
2951     rc = mwl8k_post_cmd(hw, &cmd->header);
2952     kfree(cmd);
2953 
2954     return rc;
2955 }
2956 
2957 /*
2958  * CMD_SET_BEACON.
2959  */
2960 struct mwl8k_cmd_set_beacon {
2961     struct mwl8k_cmd_pkt header;
2962     __le16 beacon_len;
2963     __u8 beacon[];
2964 };
2965 
2966 static int mwl8k_cmd_set_beacon(struct ieee80211_hw *hw,
2967                 struct ieee80211_vif *vif, u8 *beacon, int len)
2968 {
2969     struct mwl8k_cmd_set_beacon *cmd;
2970     int rc;
2971 
2972     cmd = kzalloc(sizeof(*cmd) + len, GFP_KERNEL);
2973     if (cmd == NULL)
2974         return -ENOMEM;
2975 
2976     cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_BEACON);
2977     cmd->header.length = cpu_to_le16(sizeof(*cmd) + len);
2978     cmd->beacon_len = cpu_to_le16(len);
2979     memcpy(cmd->beacon, beacon, len);
2980 
2981     rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
2982     kfree(cmd);
2983 
2984     return rc;
2985 }
2986 
2987 /*
2988  * CMD_SET_PRE_SCAN.
2989  */
2990 struct mwl8k_cmd_set_pre_scan {
2991     struct mwl8k_cmd_pkt header;
2992 } __packed;
2993 
2994 static int mwl8k_cmd_set_pre_scan(struct ieee80211_hw *hw)
2995 {
2996     struct mwl8k_cmd_set_pre_scan *cmd;
2997     int rc;
2998 
2999     cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3000     if (cmd == NULL)
3001         return -ENOMEM;
3002 
3003     cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_PRE_SCAN);
3004     cmd->header.length = cpu_to_le16(sizeof(*cmd));
3005 
3006     rc = mwl8k_post_cmd(hw, &cmd->header);
3007     kfree(cmd);
3008 
3009     return rc;
3010 }
3011 
3012 /*
3013  * CMD_BBP_REG_ACCESS.
3014  */
3015 struct mwl8k_cmd_bbp_reg_access {
3016     struct mwl8k_cmd_pkt header;
3017     __le16 action;
3018     __le16 offset;
3019     u8 value;
3020     u8 rsrv[3];
3021 } __packed;
3022 
3023 static int
3024 mwl8k_cmd_bbp_reg_access(struct ieee80211_hw *hw,
3025              u16 action,
3026              u16 offset,
3027              u8 *value)
3028 {
3029     struct mwl8k_cmd_bbp_reg_access *cmd;
3030     int rc;
3031 
3032     cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3033     if (cmd == NULL)
3034         return -ENOMEM;
3035 
3036     cmd->header.code = cpu_to_le16(MWL8K_CMD_BBP_REG_ACCESS);
3037     cmd->header.length = cpu_to_le16(sizeof(*cmd));
3038     cmd->action = cpu_to_le16(action);
3039     cmd->offset = cpu_to_le16(offset);
3040 
3041     rc = mwl8k_post_cmd(hw, &cmd->header);
3042 
3043     if (!rc)
3044         *value = cmd->value;
3045     else
3046         *value = 0;
3047 
3048     kfree(cmd);
3049 
3050     return rc;
3051 }
3052 
3053 /*
3054  * CMD_SET_POST_SCAN.
3055  */
3056 struct mwl8k_cmd_set_post_scan {
3057     struct mwl8k_cmd_pkt header;
3058     __le32 isibss;
3059     __u8 bssid[ETH_ALEN];
3060 } __packed;
3061 
3062 static int
3063 mwl8k_cmd_set_post_scan(struct ieee80211_hw *hw, const __u8 *mac)
3064 {
3065     struct mwl8k_cmd_set_post_scan *cmd;
3066     int rc;
3067 
3068     cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3069     if (cmd == NULL)
3070         return -ENOMEM;
3071 
3072     cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_POST_SCAN);
3073     cmd->header.length = cpu_to_le16(sizeof(*cmd));
3074     cmd->isibss = 0;
3075     memcpy(cmd->bssid, mac, ETH_ALEN);
3076 
3077     rc = mwl8k_post_cmd(hw, &cmd->header);
3078     kfree(cmd);
3079 
3080     return rc;
3081 }
3082 
3083 static int freq_to_idx(struct mwl8k_priv *priv, int freq)
3084 {
3085     struct ieee80211_supported_band *sband;
3086     int band, ch, idx = 0;
3087 
3088     for (band = NL80211_BAND_2GHZ; band < NUM_NL80211_BANDS; band++) {
3089         sband = priv->hw->wiphy->bands[band];
3090         if (!sband)
3091             continue;
3092 
3093         for (ch = 0; ch < sband->n_channels; ch++, idx++)
3094             if (sband->channels[ch].center_freq == freq)
3095                 goto exit;
3096     }
3097 
3098 exit:
3099     return idx;
3100 }
3101 
3102 static void mwl8k_update_survey(struct mwl8k_priv *priv,
3103                 struct ieee80211_channel *channel)
3104 {
3105     u32 cca_cnt, rx_rdy;
3106     s8 nf = 0, idx;
3107     struct survey_info *survey;
3108 
3109     idx = freq_to_idx(priv, priv->acs_chan->center_freq);
3110     if (idx >= MWL8K_NUM_CHANS) {
3111         wiphy_err(priv->hw->wiphy, "Failed to update survey\n");
3112         return;
3113     }
3114 
3115     survey = &priv->survey[idx];
3116 
3117     cca_cnt = ioread32(priv->regs + NOK_CCA_CNT_REG);
3118     cca_cnt /= 1000; /* uSecs to mSecs */
3119     survey->time_busy = (u64) cca_cnt;
3120 
3121     rx_rdy = ioread32(priv->regs + BBU_RXRDY_CNT_REG);
3122     rx_rdy /= 1000; /* uSecs to mSecs */
3123     survey->time_rx = (u64) rx_rdy;
3124 
3125     priv->channel_time = jiffies - priv->channel_time;
3126     survey->time = jiffies_to_msecs(priv->channel_time);
3127 
3128     survey->channel = channel;
3129 
3130     mwl8k_cmd_bbp_reg_access(priv->hw, 0, BBU_AVG_NOISE_VAL, &nf);
3131 
3132     /* Make sure sign is negative else ACS  at hostapd fails */
3133     survey->noise = nf * -1;
3134 
3135     survey->filled = SURVEY_INFO_NOISE_DBM |
3136              SURVEY_INFO_TIME |
3137              SURVEY_INFO_TIME_BUSY |
3138              SURVEY_INFO_TIME_RX;
3139 }
3140 
3141 /*
3142  * CMD_SET_RF_CHANNEL.
3143  */
3144 struct mwl8k_cmd_set_rf_channel {
3145     struct mwl8k_cmd_pkt header;
3146     __le16 action;
3147     __u8 current_channel;
3148     __le32 channel_flags;
3149 } __packed;
3150 
3151 static int mwl8k_cmd_set_rf_channel(struct ieee80211_hw *hw,
3152                     struct ieee80211_conf *conf)
3153 {
3154     struct ieee80211_channel *channel = conf->chandef.chan;
3155     enum nl80211_channel_type channel_type =
3156         cfg80211_get_chandef_type(&conf->chandef);
3157     struct mwl8k_cmd_set_rf_channel *cmd;
3158     struct mwl8k_priv *priv = hw->priv;
3159     int rc;
3160 
3161     cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3162     if (cmd == NULL)
3163         return -ENOMEM;
3164 
3165     cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RF_CHANNEL);
3166     cmd->header.length = cpu_to_le16(sizeof(*cmd));
3167     cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3168     cmd->current_channel = channel->hw_value;
3169 
3170     if (channel->band == NL80211_BAND_2GHZ)
3171         cmd->channel_flags |= cpu_to_le32(0x00000001);
3172     else if (channel->band == NL80211_BAND_5GHZ)
3173         cmd->channel_flags |= cpu_to_le32(0x00000004);
3174 
3175     if (!priv->sw_scan_start) {
3176         if (channel_type == NL80211_CHAN_NO_HT ||
3177             channel_type == NL80211_CHAN_HT20)
3178             cmd->channel_flags |= cpu_to_le32(0x00000080);
3179         else if (channel_type == NL80211_CHAN_HT40MINUS)
3180             cmd->channel_flags |= cpu_to_le32(0x000001900);
3181         else if (channel_type == NL80211_CHAN_HT40PLUS)
3182             cmd->channel_flags |= cpu_to_le32(0x000000900);
3183     } else {
3184         cmd->channel_flags |= cpu_to_le32(0x00000080);
3185     }
3186 
3187     if (priv->sw_scan_start) {
3188         /* Store current channel stats
3189          * before switching to newer one.
3190          * This will be processed only for AP fw.
3191          */
3192         if (priv->channel_time != 0)
3193             mwl8k_update_survey(priv, priv->acs_chan);
3194 
3195         priv->channel_time = jiffies;
3196         priv->acs_chan =  channel;
3197     }
3198 
3199     rc = mwl8k_post_cmd(hw, &cmd->header);
3200     kfree(cmd);
3201 
3202     return rc;
3203 }
3204 
3205 /*
3206  * CMD_SET_AID.
3207  */
3208 #define MWL8K_FRAME_PROT_DISABLED           0x00
3209 #define MWL8K_FRAME_PROT_11G                0x07
3210 #define MWL8K_FRAME_PROT_11N_HT_40MHZ_ONLY      0x02
3211 #define MWL8K_FRAME_PROT_11N_HT_ALL         0x06
3212 
3213 struct mwl8k_cmd_update_set_aid {
3214     struct  mwl8k_cmd_pkt header;
3215     __le16  aid;
3216 
3217      /* AP's MAC address (BSSID) */
3218     __u8    bssid[ETH_ALEN];
3219     __le16  protection_mode;
3220     __u8    supp_rates[14];
3221 } __packed;
3222 
3223 static void legacy_rate_mask_to_array(u8 *rates, u32 mask)
3224 {
3225     int i;
3226     int j;
3227 
3228     /*
3229      * Clear nonstandard rate 4.
3230      */
3231     mask &= 0x1fef;
3232 
3233     for (i = 0, j = 0; i < 13; i++) {
3234         if (mask & (1 << i))
3235             rates[j++] = mwl8k_rates_24[i].hw_value;
3236     }
3237 }
3238 
3239 static int
3240 mwl8k_cmd_set_aid(struct ieee80211_hw *hw,
3241           struct ieee80211_vif *vif, u32 legacy_rate_mask)
3242 {
3243     struct mwl8k_cmd_update_set_aid *cmd;
3244     u16 prot_mode;
3245     int rc;
3246 
3247     cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3248     if (cmd == NULL)
3249         return -ENOMEM;
3250 
3251     cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_AID);
3252     cmd->header.length = cpu_to_le16(sizeof(*cmd));
3253     cmd->aid = cpu_to_le16(vif->cfg.aid);
3254     memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
3255 
3256     if (vif->bss_conf.use_cts_prot) {
3257         prot_mode = MWL8K_FRAME_PROT_11G;
3258     } else {
3259         switch (vif->bss_conf.ht_operation_mode &
3260             IEEE80211_HT_OP_MODE_PROTECTION) {
3261         case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
3262             prot_mode = MWL8K_FRAME_PROT_11N_HT_40MHZ_ONLY;
3263             break;
3264         case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
3265             prot_mode = MWL8K_FRAME_PROT_11N_HT_ALL;
3266             break;
3267         default:
3268             prot_mode = MWL8K_FRAME_PROT_DISABLED;
3269             break;
3270         }
3271     }
3272     cmd->protection_mode = cpu_to_le16(prot_mode);
3273 
3274     legacy_rate_mask_to_array(cmd->supp_rates, legacy_rate_mask);
3275 
3276     rc = mwl8k_post_cmd(hw, &cmd->header);
3277     kfree(cmd);
3278 
3279     return rc;
3280 }
3281 
3282 /*
3283  * CMD_SET_RATE.
3284  */
3285 struct mwl8k_cmd_set_rate {
3286     struct  mwl8k_cmd_pkt header;
3287     __u8    legacy_rates[14];
3288 
3289     /* Bitmap for supported MCS codes.  */
3290     __u8    mcs_set[16];
3291     __u8    reserved[16];
3292 } __packed;
3293 
3294 static int
3295 mwl8k_cmd_set_rate(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
3296            u32 legacy_rate_mask, u8 *mcs_rates)
3297 {
3298     struct mwl8k_cmd_set_rate *cmd;
3299     int rc;
3300 
3301     cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3302     if (cmd == NULL)
3303         return -ENOMEM;
3304 
3305     cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RATE);
3306     cmd->header.length = cpu_to_le16(sizeof(*cmd));
3307     legacy_rate_mask_to_array(cmd->legacy_rates, legacy_rate_mask);
3308     memcpy(cmd->mcs_set, mcs_rates, 16);
3309 
3310     rc = mwl8k_post_cmd(hw, &cmd->header);
3311     kfree(cmd);
3312 
3313     return rc;
3314 }
3315 
3316 /*
3317  * CMD_FINALIZE_JOIN.
3318  */
3319 #define MWL8K_FJ_BEACON_MAXLEN  128
3320 
3321 struct mwl8k_cmd_finalize_join {
3322     struct mwl8k_cmd_pkt header;
3323     __le32 sleep_interval;  /* Number of beacon periods to sleep */
3324     __u8 beacon_data[MWL8K_FJ_BEACON_MAXLEN];
3325 } __packed;
3326 
3327 static int mwl8k_cmd_finalize_join(struct ieee80211_hw *hw, void *frame,
3328                    int framelen, int dtim)
3329 {
3330     struct mwl8k_cmd_finalize_join *cmd;
3331     struct ieee80211_mgmt *payload = frame;
3332     int payload_len;
3333     int rc;
3334 
3335     cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3336     if (cmd == NULL)
3337         return -ENOMEM;
3338 
3339     cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_FINALIZE_JOIN);
3340     cmd->header.length = cpu_to_le16(sizeof(*cmd));
3341     cmd->sleep_interval = cpu_to_le32(dtim ? dtim : 1);
3342 
3343     payload_len = framelen - ieee80211_hdrlen(payload->frame_control);
3344     if (payload_len < 0)
3345         payload_len = 0;
3346     else if (payload_len > MWL8K_FJ_BEACON_MAXLEN)
3347         payload_len = MWL8K_FJ_BEACON_MAXLEN;
3348 
3349     memcpy(cmd->beacon_data, &payload->u.beacon, payload_len);
3350 
3351     rc = mwl8k_post_cmd(hw, &cmd->header);
3352     kfree(cmd);
3353 
3354     return rc;
3355 }
3356 
3357 /*
3358  * CMD_SET_RTS_THRESHOLD.
3359  */
3360 struct mwl8k_cmd_set_rts_threshold {
3361     struct mwl8k_cmd_pkt header;
3362     __le16 action;
3363     __le16 threshold;
3364 } __packed;
3365 
3366 static int
3367 mwl8k_cmd_set_rts_threshold(struct ieee80211_hw *hw, int rts_thresh)
3368 {
3369     struct mwl8k_cmd_set_rts_threshold *cmd;
3370     int rc;
3371 
3372     cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3373     if (cmd == NULL)
3374         return -ENOMEM;
3375 
3376     cmd->header.code = cpu_to_le16(MWL8K_CMD_RTS_THRESHOLD);
3377     cmd->header.length = cpu_to_le16(sizeof(*cmd));
3378     cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3379     cmd->threshold = cpu_to_le16(rts_thresh);
3380 
3381     rc = mwl8k_post_cmd(hw, &cmd->header);
3382     kfree(cmd);
3383 
3384     return rc;
3385 }
3386 
3387 /*
3388  * CMD_SET_SLOT.
3389  */
3390 struct mwl8k_cmd_set_slot {
3391     struct mwl8k_cmd_pkt header;
3392     __le16 action;
3393     __u8 short_slot;
3394 } __packed;
3395 
3396 static int mwl8k_cmd_set_slot(struct ieee80211_hw *hw, bool short_slot_time)
3397 {
3398     struct mwl8k_cmd_set_slot *cmd;
3399     int rc;
3400 
3401     cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3402     if (cmd == NULL)
3403         return -ENOMEM;
3404 
3405     cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_SLOT);
3406     cmd->header.length = cpu_to_le16(sizeof(*cmd));
3407     cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3408     cmd->short_slot = short_slot_time;
3409 
3410     rc = mwl8k_post_cmd(hw, &cmd->header);
3411     kfree(cmd);
3412 
3413     return rc;
3414 }
3415 
3416 /*
3417  * CMD_SET_EDCA_PARAMS.
3418  */
3419 struct mwl8k_cmd_set_edca_params {
3420     struct mwl8k_cmd_pkt header;
3421 
3422     /* See MWL8K_SET_EDCA_XXX below */
3423     __le16 action;
3424 
3425     /* TX opportunity in units of 32 us */
3426     __le16 txop;
3427 
3428     union {
3429         struct {
3430             /* Log exponent of max contention period: 0...15 */
3431             __le32 log_cw_max;
3432 
3433             /* Log exponent of min contention period: 0...15 */
3434             __le32 log_cw_min;
3435 
3436             /* Adaptive interframe spacing in units of 32us */
3437             __u8 aifs;
3438 
3439             /* TX queue to configure */
3440             __u8 txq;
3441         } ap;
3442         struct {
3443             /* Log exponent of max contention period: 0...15 */
3444             __u8 log_cw_max;
3445 
3446             /* Log exponent of min contention period: 0...15 */
3447             __u8 log_cw_min;
3448 
3449             /* Adaptive interframe spacing in units of 32us */
3450             __u8 aifs;
3451 
3452             /* TX queue to configure */
3453             __u8 txq;
3454         } sta;
3455     };
3456 } __packed;
3457 
3458 #define MWL8K_SET_EDCA_CW   0x01
3459 #define MWL8K_SET_EDCA_TXOP 0x02
3460 #define MWL8K_SET_EDCA_AIFS 0x04
3461 
3462 #define MWL8K_SET_EDCA_ALL  (MWL8K_SET_EDCA_CW | \
3463                  MWL8K_SET_EDCA_TXOP | \
3464                  MWL8K_SET_EDCA_AIFS)
3465 
3466 static int
3467 mwl8k_cmd_set_edca_params(struct ieee80211_hw *hw, __u8 qnum,
3468               __u16 cw_min, __u16 cw_max,
3469               __u8 aifs, __u16 txop)
3470 {
3471     struct mwl8k_priv *priv = hw->priv;
3472     struct mwl8k_cmd_set_edca_params *cmd;
3473     int rc;
3474 
3475     cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3476     if (cmd == NULL)
3477         return -ENOMEM;
3478 
3479     cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_EDCA_PARAMS);
3480     cmd->header.length = cpu_to_le16(sizeof(*cmd));
3481     cmd->action = cpu_to_le16(MWL8K_SET_EDCA_ALL);
3482     cmd->txop = cpu_to_le16(txop);
3483     if (priv->ap_fw) {
3484         cmd->ap.log_cw_max = cpu_to_le32(ilog2(cw_max + 1));
3485         cmd->ap.log_cw_min = cpu_to_le32(ilog2(cw_min + 1));
3486         cmd->ap.aifs = aifs;
3487         cmd->ap.txq = qnum;
3488     } else {
3489         cmd->sta.log_cw_max = (u8)ilog2(cw_max + 1);
3490         cmd->sta.log_cw_min = (u8)ilog2(cw_min + 1);
3491         cmd->sta.aifs = aifs;
3492         cmd->sta.txq = qnum;
3493     }
3494 
3495     rc = mwl8k_post_cmd(hw, &cmd->header);
3496     kfree(cmd);
3497 
3498     return rc;
3499 }
3500 
3501 /*
3502  * CMD_SET_WMM_MODE.
3503  */
3504 struct mwl8k_cmd_set_wmm_mode {
3505     struct mwl8k_cmd_pkt header;
3506     __le16 action;
3507 } __packed;
3508 
3509 static int mwl8k_cmd_set_wmm_mode(struct ieee80211_hw *hw, bool enable)
3510 {
3511     struct mwl8k_priv *priv = hw->priv;
3512     struct mwl8k_cmd_set_wmm_mode *cmd;
3513     int rc;
3514 
3515     cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3516     if (cmd == NULL)
3517         return -ENOMEM;
3518 
3519     cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_WMM_MODE);
3520     cmd->header.length = cpu_to_le16(sizeof(*cmd));
3521     cmd->action = cpu_to_le16(!!enable);
3522 
3523     rc = mwl8k_post_cmd(hw, &cmd->header);
3524     kfree(cmd);
3525 
3526     if (!rc)
3527         priv->wmm_enabled = enable;
3528 
3529     return rc;
3530 }
3531 
3532 /*
3533  * CMD_MIMO_CONFIG.
3534  */
3535 struct mwl8k_cmd_mimo_config {
3536     struct mwl8k_cmd_pkt header;
3537     __le32 action;
3538     __u8 rx_antenna_map;
3539     __u8 tx_antenna_map;
3540 } __packed;
3541 
3542 static int mwl8k_cmd_mimo_config(struct ieee80211_hw *hw, __u8 rx, __u8 tx)
3543 {
3544     struct mwl8k_cmd_mimo_config *cmd;
3545     int rc;
3546 
3547     cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3548     if (cmd == NULL)
3549         return -ENOMEM;
3550 
3551     cmd->header.code = cpu_to_le16(MWL8K_CMD_MIMO_CONFIG);
3552     cmd->header.length = cpu_to_le16(sizeof(*cmd));
3553     cmd->action = cpu_to_le32((u32)MWL8K_CMD_SET);
3554     cmd->rx_antenna_map = rx;
3555     cmd->tx_antenna_map = tx;
3556 
3557     rc = mwl8k_post_cmd(hw, &cmd->header);
3558     kfree(cmd);
3559 
3560     return rc;
3561 }
3562 
3563 /*
3564  * CMD_USE_FIXED_RATE (STA version).
3565  */
3566 struct mwl8k_cmd_use_fixed_rate_sta {
3567     struct mwl8k_cmd_pkt header;
3568     __le32 action;
3569     __le32 allow_rate_drop;
3570     __le32 num_rates;
3571     struct {
3572         __le32 is_ht_rate;
3573         __le32 enable_retry;
3574         __le32 rate;
3575         __le32 retry_count;
3576     } rate_entry[8];
3577     __le32 rate_type;
3578     __le32 reserved1;
3579     __le32 reserved2;
3580 } __packed;
3581 
3582 #define MWL8K_USE_AUTO_RATE 0x0002
3583 #define MWL8K_UCAST_RATE    0
3584 
3585 static int mwl8k_cmd_use_fixed_rate_sta(struct ieee80211_hw *hw)
3586 {
3587     struct mwl8k_cmd_use_fixed_rate_sta *cmd;
3588     int rc;
3589 
3590     cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3591     if (cmd == NULL)
3592         return -ENOMEM;
3593 
3594     cmd->header.code = cpu_to_le16(MWL8K_CMD_USE_FIXED_RATE);
3595     cmd->header.length = cpu_to_le16(sizeof(*cmd));
3596     cmd->action = cpu_to_le32(MWL8K_USE_AUTO_RATE);
3597     cmd->rate_type = cpu_to_le32(MWL8K_UCAST_RATE);
3598 
3599     rc = mwl8k_post_cmd(hw, &cmd->header);
3600     kfree(cmd);
3601 
3602     return rc;
3603 }
3604 
3605 /*
3606  * CMD_USE_FIXED_RATE (AP version).
3607  */
3608 struct mwl8k_cmd_use_fixed_rate_ap {
3609     struct mwl8k_cmd_pkt header;
3610     __le32 action;
3611     __le32 allow_rate_drop;
3612     __le32 num_rates;
3613     struct mwl8k_rate_entry_ap {
3614         __le32 is_ht_rate;
3615         __le32 enable_retry;
3616         __le32 rate;
3617         __le32 retry_count;
3618     } rate_entry[4];
3619     u8 multicast_rate;
3620     u8 multicast_rate_type;
3621     u8 management_rate;
3622 } __packed;
3623 
3624 static int
3625 mwl8k_cmd_use_fixed_rate_ap(struct ieee80211_hw *hw, int mcast, int mgmt)
3626 {
3627     struct mwl8k_cmd_use_fixed_rate_ap *cmd;
3628     int rc;
3629 
3630     cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3631     if (cmd == NULL)
3632         return -ENOMEM;
3633 
3634     cmd->header.code = cpu_to_le16(MWL8K_CMD_USE_FIXED_RATE);
3635     cmd->header.length = cpu_to_le16(sizeof(*cmd));
3636     cmd->action = cpu_to_le32(MWL8K_USE_AUTO_RATE);
3637     cmd->multicast_rate = mcast;
3638     cmd->management_rate = mgmt;
3639 
3640     rc = mwl8k_post_cmd(hw, &cmd->header);
3641     kfree(cmd);
3642 
3643     return rc;
3644 }
3645 
3646 /*
3647  * CMD_ENABLE_SNIFFER.
3648  */
3649 struct mwl8k_cmd_enable_sniffer {
3650     struct mwl8k_cmd_pkt header;
3651     __le32 action;
3652 } __packed;
3653 
3654 static int mwl8k_cmd_enable_sniffer(struct ieee80211_hw *hw, bool enable)
3655 {
3656     struct mwl8k_cmd_enable_sniffer *cmd;
3657     int rc;
3658 
3659     cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3660     if (cmd == NULL)
3661         return -ENOMEM;
3662 
3663     cmd->header.code = cpu_to_le16(MWL8K_CMD_ENABLE_SNIFFER);
3664     cmd->header.length = cpu_to_le16(sizeof(*cmd));
3665     cmd->action = cpu_to_le32(!!enable);
3666 
3667     rc = mwl8k_post_cmd(hw, &cmd->header);
3668     kfree(cmd);
3669 
3670     return rc;
3671 }
3672 
3673 struct mwl8k_cmd_update_mac_addr {
3674     struct mwl8k_cmd_pkt header;
3675     union {
3676         struct {
3677             __le16 mac_type;
3678             __u8 mac_addr[ETH_ALEN];
3679         } mbss;
3680         __u8 mac_addr[ETH_ALEN];
3681     };
3682 } __packed;
3683 
3684 #define MWL8K_MAC_TYPE_PRIMARY_CLIENT       0
3685 #define MWL8K_MAC_TYPE_SECONDARY_CLIENT     1
3686 #define MWL8K_MAC_TYPE_PRIMARY_AP       2
3687 #define MWL8K_MAC_TYPE_SECONDARY_AP     3
3688 
3689 static int mwl8k_cmd_update_mac_addr(struct ieee80211_hw *hw,
3690                   struct ieee80211_vif *vif, u8 *mac, bool set)
3691 {
3692     struct mwl8k_priv *priv = hw->priv;
3693     struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
3694     struct mwl8k_cmd_update_mac_addr *cmd;
3695     int mac_type;
3696     int rc;
3697 
3698     mac_type = MWL8K_MAC_TYPE_PRIMARY_AP;
3699     if (vif != NULL && vif->type == NL80211_IFTYPE_STATION) {
3700         if (mwl8k_vif->macid + 1 == ffs(priv->sta_macids_supported))
3701             if (priv->ap_fw)
3702                 mac_type = MWL8K_MAC_TYPE_SECONDARY_CLIENT;
3703             else
3704                 mac_type = MWL8K_MAC_TYPE_PRIMARY_CLIENT;
3705         else
3706             mac_type = MWL8K_MAC_TYPE_SECONDARY_CLIENT;
3707     } else if (vif != NULL && vif->type == NL80211_IFTYPE_AP) {
3708         if (mwl8k_vif->macid + 1 == ffs(priv->ap_macids_supported))
3709             mac_type = MWL8K_MAC_TYPE_PRIMARY_AP;
3710         else
3711             mac_type = MWL8K_MAC_TYPE_SECONDARY_AP;
3712     }
3713 
3714     cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3715     if (cmd == NULL)
3716         return -ENOMEM;
3717 
3718     if (set)
3719         cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_MAC_ADDR);
3720     else
3721         cmd->header.code = cpu_to_le16(MWL8K_CMD_DEL_MAC_ADDR);
3722 
3723     cmd->header.length = cpu_to_le16(sizeof(*cmd));
3724     if (priv->ap_fw) {
3725         cmd->mbss.mac_type = cpu_to_le16(mac_type);
3726         memcpy(cmd->mbss.mac_addr, mac, ETH_ALEN);
3727     } else {
3728         memcpy(cmd->mac_addr, mac, ETH_ALEN);
3729     }
3730 
3731     rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3732     kfree(cmd);
3733 
3734     return rc;
3735 }
3736 
3737 /*
3738  * MWL8K_CMD_SET_MAC_ADDR.
3739  */
3740 static inline int mwl8k_cmd_set_mac_addr(struct ieee80211_hw *hw,
3741                   struct ieee80211_vif *vif, u8 *mac)
3742 {
3743     return mwl8k_cmd_update_mac_addr(hw, vif, mac, true);
3744 }
3745 
3746 /*
3747  * MWL8K_CMD_DEL_MAC_ADDR.
3748  */
3749 static inline int mwl8k_cmd_del_mac_addr(struct ieee80211_hw *hw,
3750                   struct ieee80211_vif *vif, u8 *mac)
3751 {
3752     return mwl8k_cmd_update_mac_addr(hw, vif, mac, false);
3753 }
3754 
3755 /*
3756  * CMD_SET_RATEADAPT_MODE.
3757  */
3758 struct mwl8k_cmd_set_rate_adapt_mode {
3759     struct mwl8k_cmd_pkt header;
3760     __le16 action;
3761     __le16 mode;
3762 } __packed;
3763 
3764 static int mwl8k_cmd_set_rateadapt_mode(struct ieee80211_hw *hw, __u16 mode)
3765 {
3766     struct mwl8k_cmd_set_rate_adapt_mode *cmd;
3767     int rc;
3768 
3769     cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3770     if (cmd == NULL)
3771         return -ENOMEM;
3772 
3773     cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RATEADAPT_MODE);
3774     cmd->header.length = cpu_to_le16(sizeof(*cmd));
3775     cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3776     cmd->mode = cpu_to_le16(mode);
3777 
3778     rc = mwl8k_post_cmd(hw, &cmd->header);
3779     kfree(cmd);
3780 
3781     return rc;
3782 }
3783 
3784 /*
3785  * CMD_GET_WATCHDOG_BITMAP.
3786  */
3787 struct mwl8k_cmd_get_watchdog_bitmap {
3788     struct mwl8k_cmd_pkt header;
3789     u8  bitmap;
3790 } __packed;
3791 
3792 static int mwl8k_cmd_get_watchdog_bitmap(struct ieee80211_hw *hw, u8 *bitmap)
3793 {
3794     struct mwl8k_cmd_get_watchdog_bitmap *cmd;
3795     int rc;
3796 
3797     cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3798     if (cmd == NULL)
3799         return -ENOMEM;
3800 
3801     cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_WATCHDOG_BITMAP);
3802     cmd->header.length = cpu_to_le16(sizeof(*cmd));
3803 
3804     rc = mwl8k_post_cmd(hw, &cmd->header);
3805     if (!rc)
3806         *bitmap = cmd->bitmap;
3807 
3808     kfree(cmd);
3809 
3810     return rc;
3811 }
3812 
3813 #define MWL8K_WMM_QUEUE_NUMBER  3
3814 
3815 static void mwl8k_destroy_ba(struct ieee80211_hw *hw,
3816                  u8 idx);
3817 
3818 static void mwl8k_watchdog_ba_events(struct work_struct *work)
3819 {
3820     int rc;
3821     u8 bitmap = 0, stream_index;
3822     struct mwl8k_ampdu_stream *streams;
3823     struct mwl8k_priv *priv =
3824         container_of(work, struct mwl8k_priv, watchdog_ba_handle);
3825     struct ieee80211_hw *hw = priv->hw;
3826     int i;
3827     u32 status = 0;
3828 
3829     mwl8k_fw_lock(hw);
3830 
3831     rc = mwl8k_cmd_get_watchdog_bitmap(priv->hw, &bitmap);
3832     if (rc)
3833         goto done;
3834 
3835     spin_lock(&priv->stream_lock);
3836 
3837     /* the bitmap is the hw queue number.  Map it to the ampdu queue. */
3838     for (i = 0; i < TOTAL_HW_TX_QUEUES; i++) {
3839         if (bitmap & (1 << i)) {
3840             stream_index = (i + MWL8K_WMM_QUEUE_NUMBER) %
3841                        TOTAL_HW_TX_QUEUES;
3842             streams = &priv->ampdu[stream_index];
3843             if (streams->state == AMPDU_STREAM_ACTIVE) {
3844                 ieee80211_stop_tx_ba_session(streams->sta,
3845                                  streams->tid);
3846                 spin_unlock(&priv->stream_lock);
3847                 mwl8k_destroy_ba(hw, stream_index);
3848                 spin_lock(&priv->stream_lock);
3849             }
3850         }
3851     }
3852 
3853     spin_unlock(&priv->stream_lock);
3854 done:
3855     atomic_dec(&priv->watchdog_event_pending);
3856     status = ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
3857     iowrite32((status | MWL8K_A2H_INT_BA_WATCHDOG),
3858           priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
3859     mwl8k_fw_unlock(hw);
3860     return;
3861 }
3862 
3863 
3864 /*
3865  * CMD_BSS_START.
3866  */
3867 struct mwl8k_cmd_bss_start {
3868     struct mwl8k_cmd_pkt header;
3869     __le32 enable;
3870 } __packed;
3871 
3872 static int mwl8k_cmd_bss_start(struct ieee80211_hw *hw,
3873                    struct ieee80211_vif *vif, int enable)
3874 {
3875     struct mwl8k_cmd_bss_start *cmd;
3876     struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
3877     struct mwl8k_priv *priv = hw->priv;
3878     int rc;
3879 
3880     if (enable && (priv->running_bsses & (1 << mwl8k_vif->macid)))
3881         return 0;
3882 
3883     if (!enable && !(priv->running_bsses & (1 << mwl8k_vif->macid)))
3884         return 0;
3885 
3886     cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3887     if (cmd == NULL)
3888         return -ENOMEM;
3889 
3890     cmd->header.code = cpu_to_le16(MWL8K_CMD_BSS_START);
3891     cmd->header.length = cpu_to_le16(sizeof(*cmd));
3892     cmd->enable = cpu_to_le32(enable);
3893 
3894     rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3895     kfree(cmd);
3896 
3897     if (!rc) {
3898         if (enable)
3899             priv->running_bsses |= (1 << mwl8k_vif->macid);
3900         else
3901             priv->running_bsses &= ~(1 << mwl8k_vif->macid);
3902     }
3903     return rc;
3904 }
3905 
3906 static void mwl8k_enable_bsses(struct ieee80211_hw *hw, bool enable, u32 bitmap)
3907 {
3908     struct mwl8k_priv *priv = hw->priv;
3909     struct mwl8k_vif *mwl8k_vif, *tmp_vif;
3910     struct ieee80211_vif *vif;
3911 
3912     list_for_each_entry_safe(mwl8k_vif, tmp_vif, &priv->vif_list, list) {
3913         vif = mwl8k_vif->vif;
3914 
3915         if (!(bitmap & (1 << mwl8k_vif->macid)))
3916             continue;
3917 
3918         if (vif->type == NL80211_IFTYPE_AP)
3919             mwl8k_cmd_bss_start(hw, vif, enable);
3920     }
3921 }
3922 /*
3923  * CMD_BASTREAM.
3924  */
3925 
3926 /*
3927  * UPSTREAM is tx direction
3928  */
3929 #define BASTREAM_FLAG_DIRECTION_UPSTREAM    0x00
3930 #define BASTREAM_FLAG_IMMEDIATE_TYPE        0x01
3931 
3932 enum ba_stream_action_type {
3933     MWL8K_BA_CREATE,
3934     MWL8K_BA_UPDATE,
3935     MWL8K_BA_DESTROY,
3936     MWL8K_BA_FLUSH,
3937     MWL8K_BA_CHECK,
3938 };
3939 
3940 
3941 struct mwl8k_create_ba_stream {
3942     __le32  flags;
3943     __le32  idle_thrs;
3944     __le32  bar_thrs;
3945     __le32  window_size;
3946     u8  peer_mac_addr[6];
3947     u8  dialog_token;
3948     u8  tid;
3949     u8  queue_id;
3950     u8  param_info;
3951     __le32  ba_context;
3952     u8  reset_seq_no_flag;
3953     __le16  curr_seq_no;
3954     u8  sta_src_mac_addr[6];
3955 } __packed;
3956 
3957 struct mwl8k_destroy_ba_stream {
3958     __le32  flags;
3959     __le32  ba_context;
3960 } __packed;
3961 
3962 struct mwl8k_cmd_bastream {
3963     struct mwl8k_cmd_pkt    header;
3964     __le32  action;
3965     union {
3966         struct mwl8k_create_ba_stream   create_params;
3967         struct mwl8k_destroy_ba_stream  destroy_params;
3968     };
3969 } __packed;
3970 
3971 static int
3972 mwl8k_check_ba(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream,
3973            struct ieee80211_vif *vif)
3974 {
3975     struct mwl8k_cmd_bastream *cmd;
3976     int rc;
3977 
3978     cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3979     if (cmd == NULL)
3980         return -ENOMEM;
3981 
3982     cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
3983     cmd->header.length = cpu_to_le16(sizeof(*cmd));
3984 
3985     cmd->action = cpu_to_le32(MWL8K_BA_CHECK);
3986 
3987     cmd->create_params.queue_id = stream->idx;
3988     memcpy(&cmd->create_params.peer_mac_addr[0], stream->sta->addr,
3989            ETH_ALEN);
3990     cmd->create_params.tid = stream->tid;
3991 
3992     cmd->create_params.flags =
3993         cpu_to_le32(BASTREAM_FLAG_IMMEDIATE_TYPE) |
3994         cpu_to_le32(BASTREAM_FLAG_DIRECTION_UPSTREAM);
3995 
3996     rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3997 
3998     kfree(cmd);
3999 
4000     return rc;
4001 }
4002 
4003 static int
4004 mwl8k_create_ba(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream,
4005         u8 buf_size, struct ieee80211_vif *vif)
4006 {
4007     struct mwl8k_cmd_bastream *cmd;
4008     int rc;
4009 
4010     cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4011     if (cmd == NULL)
4012         return -ENOMEM;
4013 
4014 
4015     cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
4016     cmd->header.length = cpu_to_le16(sizeof(*cmd));
4017 
4018     cmd->action = cpu_to_le32(MWL8K_BA_CREATE);
4019 
4020     cmd->create_params.bar_thrs = cpu_to_le32((u32)buf_size);
4021     cmd->create_params.window_size = cpu_to_le32((u32)buf_size);
4022     cmd->create_params.queue_id = stream->idx;
4023 
4024     memcpy(cmd->create_params.peer_mac_addr, stream->sta->addr, ETH_ALEN);
4025     cmd->create_params.tid = stream->tid;
4026     cmd->create_params.curr_seq_no = cpu_to_le16(0);
4027     cmd->create_params.reset_seq_no_flag = 1;
4028 
4029     cmd->create_params.param_info =
4030         (stream->sta->deflink.ht_cap.ampdu_factor &
4031          IEEE80211_HT_AMPDU_PARM_FACTOR) |
4032         ((stream->sta->deflink.ht_cap.ampdu_density << 2) &
4033          IEEE80211_HT_AMPDU_PARM_DENSITY);
4034 
4035     cmd->create_params.flags =
4036         cpu_to_le32(BASTREAM_FLAG_IMMEDIATE_TYPE |
4037                     BASTREAM_FLAG_DIRECTION_UPSTREAM);
4038 
4039     rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4040 
4041     wiphy_debug(hw->wiphy, "Created a BA stream for %pM : tid %d\n",
4042         stream->sta->addr, stream->tid);
4043     kfree(cmd);
4044 
4045     return rc;
4046 }
4047 
4048 static void mwl8k_destroy_ba(struct ieee80211_hw *hw,
4049                  u8 idx)
4050 {
4051     struct mwl8k_cmd_bastream *cmd;
4052 
4053     cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4054     if (cmd == NULL)
4055         return;
4056 
4057     cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
4058     cmd->header.length = cpu_to_le16(sizeof(*cmd));
4059     cmd->action = cpu_to_le32(MWL8K_BA_DESTROY);
4060 
4061     cmd->destroy_params.ba_context = cpu_to_le32(idx);
4062     mwl8k_post_cmd(hw, &cmd->header);
4063 
4064     wiphy_debug(hw->wiphy, "Deleted BA stream index %d\n", idx);
4065 
4066     kfree(cmd);
4067 }
4068 
4069 /*
4070  * CMD_SET_NEW_STN.
4071  */
4072 struct mwl8k_cmd_set_new_stn {
4073     struct mwl8k_cmd_pkt header;
4074     __le16 aid;
4075     __u8 mac_addr[6];
4076     __le16 stn_id;
4077     __le16 action;
4078     __le16 rsvd;
4079     __le32 legacy_rates;
4080     __u8 ht_rates[4];
4081     __le16 cap_info;
4082     __le16 ht_capabilities_info;
4083     __u8 mac_ht_param_info;
4084     __u8 rev;
4085     __u8 control_channel;
4086     __u8 add_channel;
4087     __le16 op_mode;
4088     __le16 stbc;
4089     __u8 add_qos_info;
4090     __u8 is_qos_sta;
4091     __le32 fw_sta_ptr;
4092 } __packed;
4093 
4094 #define MWL8K_STA_ACTION_ADD        0
4095 #define MWL8K_STA_ACTION_REMOVE     2
4096 
4097 static int mwl8k_cmd_set_new_stn_add(struct ieee80211_hw *hw,
4098                      struct ieee80211_vif *vif,
4099                      struct ieee80211_sta *sta)
4100 {
4101     struct mwl8k_cmd_set_new_stn *cmd;
4102     u32 rates;
4103     int rc;
4104 
4105     cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4106     if (cmd == NULL)
4107         return -ENOMEM;
4108 
4109     cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
4110     cmd->header.length = cpu_to_le16(sizeof(*cmd));
4111     cmd->aid = cpu_to_le16(sta->aid);
4112     memcpy(cmd->mac_addr, sta->addr, ETH_ALEN);
4113     cmd->stn_id = cpu_to_le16(sta->aid);
4114     cmd->action = cpu_to_le16(MWL8K_STA_ACTION_ADD);
4115     if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ)
4116         rates = sta->deflink.supp_rates[NL80211_BAND_2GHZ];
4117     else
4118         rates = sta->deflink.supp_rates[NL80211_BAND_5GHZ] << 5;
4119     cmd->legacy_rates = cpu_to_le32(rates);
4120     if (sta->deflink.ht_cap.ht_supported) {
4121         cmd->ht_rates[0] = sta->deflink.ht_cap.mcs.rx_mask[0];
4122         cmd->ht_rates[1] = sta->deflink.ht_cap.mcs.rx_mask[1];
4123         cmd->ht_rates[2] = sta->deflink.ht_cap.mcs.rx_mask[2];
4124         cmd->ht_rates[3] = sta->deflink.ht_cap.mcs.rx_mask[3];
4125         cmd->ht_capabilities_info = cpu_to_le16(sta->deflink.ht_cap.cap);
4126         cmd->mac_ht_param_info = (sta->deflink.ht_cap.ampdu_factor & 3) |
4127             ((sta->deflink.ht_cap.ampdu_density & 7) << 2);
4128         cmd->is_qos_sta = 1;
4129     }
4130 
4131     rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4132     kfree(cmd);
4133 
4134     return rc;
4135 }
4136 
4137 static int mwl8k_cmd_set_new_stn_add_self(struct ieee80211_hw *hw,
4138                       struct ieee80211_vif *vif)
4139 {
4140     struct mwl8k_cmd_set_new_stn *cmd;
4141     int rc;
4142 
4143     cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4144     if (cmd == NULL)
4145         return -ENOMEM;
4146 
4147     cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
4148     cmd->header.length = cpu_to_le16(sizeof(*cmd));
4149     memcpy(cmd->mac_addr, vif->addr, ETH_ALEN);
4150 
4151     rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4152     kfree(cmd);
4153 
4154     return rc;
4155 }
4156 
4157 static int mwl8k_cmd_set_new_stn_del(struct ieee80211_hw *hw,
4158                      struct ieee80211_vif *vif, u8 *addr)
4159 {
4160     struct mwl8k_cmd_set_new_stn *cmd;
4161     struct mwl8k_priv *priv = hw->priv;
4162     int rc, i;
4163     u8 idx;
4164 
4165     spin_lock(&priv->stream_lock);
4166     /* Destroy any active ampdu streams for this sta */
4167     for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
4168         struct mwl8k_ampdu_stream *s;
4169         s = &priv->ampdu[i];
4170         if (s->state != AMPDU_NO_STREAM) {
4171             if (memcmp(s->sta->addr, addr, ETH_ALEN) == 0) {
4172                 if (s->state == AMPDU_STREAM_ACTIVE) {
4173                     idx = s->idx;
4174                     spin_unlock(&priv->stream_lock);
4175                     mwl8k_destroy_ba(hw, idx);
4176                     spin_lock(&priv->stream_lock);
4177                 } else if (s->state == AMPDU_STREAM_NEW) {
4178                     mwl8k_remove_stream(hw, s);
4179                 }
4180             }
4181         }
4182     }
4183 
4184     spin_unlock(&priv->stream_lock);
4185 
4186     cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4187     if (cmd == NULL)
4188         return -ENOMEM;
4189 
4190     cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
4191     cmd->header.length = cpu_to_le16(sizeof(*cmd));
4192     memcpy(cmd->mac_addr, addr, ETH_ALEN);
4193     cmd->action = cpu_to_le16(MWL8K_STA_ACTION_REMOVE);
4194 
4195     rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4196     kfree(cmd);
4197 
4198     return rc;
4199 }
4200 
4201 /*
4202  * CMD_UPDATE_ENCRYPTION.
4203  */
4204 
4205 #define MAX_ENCR_KEY_LENGTH 16
4206 #define MIC_KEY_LENGTH      8
4207 
4208 struct mwl8k_cmd_update_encryption {
4209     struct mwl8k_cmd_pkt header;
4210 
4211     __le32 action;
4212     __le32 reserved;
4213     __u8 mac_addr[6];
4214     __u8 encr_type;
4215 
4216 } __packed;
4217 
4218 struct mwl8k_cmd_set_key {
4219     struct mwl8k_cmd_pkt header;
4220 
4221     __le32 action;
4222     __le32 reserved;
4223     __le16 length;
4224     __le16 key_type_id;
4225     __le32 key_info;
4226     __le32 key_id;
4227     __le16 key_len;
4228     struct {
4229         __u8 key_material[MAX_ENCR_KEY_LENGTH];
4230         __u8 tkip_tx_mic_key[MIC_KEY_LENGTH];
4231         __u8 tkip_rx_mic_key[MIC_KEY_LENGTH];
4232     } tkip;
4233     __le16 tkip_rsc_low;
4234     __le32 tkip_rsc_high;
4235     __le16 tkip_tsc_low;
4236     __le32 tkip_tsc_high;
4237     __u8 mac_addr[6];
4238 } __packed;
4239 
4240 enum {
4241     MWL8K_ENCR_ENABLE,
4242     MWL8K_ENCR_SET_KEY,
4243     MWL8K_ENCR_REMOVE_KEY,
4244     MWL8K_ENCR_SET_GROUP_KEY,
4245 };
4246 
4247 #define MWL8K_UPDATE_ENCRYPTION_TYPE_WEP    0
4248 #define MWL8K_UPDATE_ENCRYPTION_TYPE_DISABLE    1
4249 #define MWL8K_UPDATE_ENCRYPTION_TYPE_TKIP   4
4250 #define MWL8K_UPDATE_ENCRYPTION_TYPE_MIXED  7
4251 #define MWL8K_UPDATE_ENCRYPTION_TYPE_AES    8
4252 
4253 enum {
4254     MWL8K_ALG_WEP,
4255     MWL8K_ALG_TKIP,
4256     MWL8K_ALG_CCMP,
4257 };
4258 
4259 #define MWL8K_KEY_FLAG_TXGROUPKEY   0x00000004
4260 #define MWL8K_KEY_FLAG_PAIRWISE     0x00000008
4261 #define MWL8K_KEY_FLAG_TSC_VALID    0x00000040
4262 #define MWL8K_KEY_FLAG_WEP_TXKEY    0x01000000
4263 #define MWL8K_KEY_FLAG_MICKEY_VALID 0x02000000
4264 
4265 static int mwl8k_cmd_update_encryption_enable(struct ieee80211_hw *hw,
4266                           struct ieee80211_vif *vif,
4267                           u8 *addr,
4268                           u8 encr_type)
4269 {
4270     struct mwl8k_cmd_update_encryption *cmd;
4271     int rc;
4272 
4273     cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4274     if (cmd == NULL)
4275         return -ENOMEM;
4276 
4277     cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_ENCRYPTION);
4278     cmd->header.length = cpu_to_le16(sizeof(*cmd));
4279     cmd->action = cpu_to_le32(MWL8K_ENCR_ENABLE);
4280     memcpy(cmd->mac_addr, addr, ETH_ALEN);
4281     cmd->encr_type = encr_type;
4282 
4283     rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4284     kfree(cmd);
4285 
4286     return rc;
4287 }
4288 
4289 static int mwl8k_encryption_set_cmd_info(struct mwl8k_cmd_set_key *cmd,
4290                         u8 *addr,
4291                         struct ieee80211_key_conf *key)
4292 {
4293     cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_ENCRYPTION);
4294     cmd->header.length = cpu_to_le16(sizeof(*cmd));
4295     cmd->length = cpu_to_le16(sizeof(*cmd) -
4296                 offsetof(struct mwl8k_cmd_set_key, length));
4297     cmd->key_id = cpu_to_le32(key->keyidx);
4298     cmd->key_len = cpu_to_le16(key->keylen);
4299     memcpy(cmd->mac_addr, addr, ETH_ALEN);
4300 
4301     switch (key->cipher) {
4302     case WLAN_CIPHER_SUITE_WEP40:
4303     case WLAN_CIPHER_SUITE_WEP104:
4304         cmd->key_type_id = cpu_to_le16(MWL8K_ALG_WEP);
4305         if (key->keyidx == 0)
4306             cmd->key_info = cpu_to_le32(MWL8K_KEY_FLAG_WEP_TXKEY);
4307 
4308         break;
4309     case WLAN_CIPHER_SUITE_TKIP:
4310         cmd->key_type_id = cpu_to_le16(MWL8K_ALG_TKIP);
4311         cmd->key_info = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
4312             ? cpu_to_le32(MWL8K_KEY_FLAG_PAIRWISE)
4313             : cpu_to_le32(MWL8K_KEY_FLAG_TXGROUPKEY);
4314         cmd->key_info |= cpu_to_le32(MWL8K_KEY_FLAG_MICKEY_VALID
4315                         | MWL8K_KEY_FLAG_TSC_VALID);
4316         break;
4317     case WLAN_CIPHER_SUITE_CCMP:
4318         cmd->key_type_id = cpu_to_le16(MWL8K_ALG_CCMP);
4319         cmd->key_info = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
4320             ? cpu_to_le32(MWL8K_KEY_FLAG_PAIRWISE)
4321             : cpu_to_le32(MWL8K_KEY_FLAG_TXGROUPKEY);
4322         break;
4323     default:
4324         return -ENOTSUPP;
4325     }
4326 
4327     return 0;
4328 }
4329 
4330 static int mwl8k_cmd_encryption_set_key(struct ieee80211_hw *hw,
4331                         struct ieee80211_vif *vif,
4332                         u8 *addr,
4333                         struct ieee80211_key_conf *key)
4334 {
4335     struct mwl8k_cmd_set_key *cmd;
4336     int rc;
4337     int keymlen;
4338     u32 action;
4339     u8 idx;
4340     struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4341 
4342     cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4343     if (cmd == NULL)
4344         return -ENOMEM;
4345 
4346     rc = mwl8k_encryption_set_cmd_info(cmd, addr, key);
4347     if (rc < 0)
4348         goto done;
4349 
4350     idx = key->keyidx;
4351 
4352     if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
4353         action = MWL8K_ENCR_SET_KEY;
4354     else
4355         action = MWL8K_ENCR_SET_GROUP_KEY;
4356 
4357     switch (key->cipher) {
4358     case WLAN_CIPHER_SUITE_WEP40:
4359     case WLAN_CIPHER_SUITE_WEP104:
4360         if (!mwl8k_vif->wep_key_conf[idx].enabled) {
4361             memcpy(mwl8k_vif->wep_key_conf[idx].key, key,
4362                         sizeof(*key) + key->keylen);
4363             mwl8k_vif->wep_key_conf[idx].enabled = 1;
4364         }
4365 
4366         keymlen = key->keylen;
4367         action = MWL8K_ENCR_SET_KEY;
4368         break;
4369     case WLAN_CIPHER_SUITE_TKIP:
4370         keymlen = MAX_ENCR_KEY_LENGTH + 2 * MIC_KEY_LENGTH;
4371         break;
4372     case WLAN_CIPHER_SUITE_CCMP:
4373         keymlen = key->keylen;
4374         break;
4375     default:
4376         rc = -ENOTSUPP;
4377         goto done;
4378     }
4379 
4380     memcpy(&cmd->tkip, key->key, keymlen);
4381     cmd->action = cpu_to_le32(action);
4382 
4383     rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4384 done:
4385     kfree(cmd);
4386 
4387     return rc;
4388 }
4389 
4390 static int mwl8k_cmd_encryption_remove_key(struct ieee80211_hw *hw,
4391                         struct ieee80211_vif *vif,
4392                         u8 *addr,
4393                         struct ieee80211_key_conf *key)
4394 {
4395     struct mwl8k_cmd_set_key *cmd;
4396     int rc;
4397     struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4398 
4399     cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4400     if (cmd == NULL)
4401         return -ENOMEM;
4402 
4403     rc = mwl8k_encryption_set_cmd_info(cmd, addr, key);
4404     if (rc < 0)
4405         goto done;
4406 
4407     if (key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
4408             key->cipher == WLAN_CIPHER_SUITE_WEP104)
4409         mwl8k_vif->wep_key_conf[key->keyidx].enabled = 0;
4410 
4411     cmd->action = cpu_to_le32(MWL8K_ENCR_REMOVE_KEY);
4412 
4413     rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4414 done:
4415     kfree(cmd);
4416 
4417     return rc;
4418 }
4419 
4420 static int mwl8k_set_key(struct ieee80211_hw *hw,
4421              enum set_key_cmd cmd_param,
4422              struct ieee80211_vif *vif,
4423              struct ieee80211_sta *sta,
4424              struct ieee80211_key_conf *key)
4425 {
4426     int rc = 0;
4427     u8 encr_type;
4428     u8 *addr;
4429     struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4430     struct mwl8k_priv *priv = hw->priv;
4431 
4432     if (vif->type == NL80211_IFTYPE_STATION && !priv->ap_fw)
4433         return -EOPNOTSUPP;
4434 
4435     if (sta == NULL)
4436         addr = vif->addr;
4437     else
4438         addr = sta->addr;
4439 
4440     if (cmd_param == SET_KEY) {
4441         rc = mwl8k_cmd_encryption_set_key(hw, vif, addr, key);
4442         if (rc)
4443             goto out;
4444 
4445         if ((key->cipher == WLAN_CIPHER_SUITE_WEP40)
4446                 || (key->cipher == WLAN_CIPHER_SUITE_WEP104))
4447             encr_type = MWL8K_UPDATE_ENCRYPTION_TYPE_WEP;
4448         else
4449             encr_type = MWL8K_UPDATE_ENCRYPTION_TYPE_MIXED;
4450 
4451         rc = mwl8k_cmd_update_encryption_enable(hw, vif, addr,
4452                                 encr_type);
4453         if (rc)
4454             goto out;
4455 
4456         mwl8k_vif->is_hw_crypto_enabled = true;
4457 
4458     } else {
4459         rc = mwl8k_cmd_encryption_remove_key(hw, vif, addr, key);
4460 
4461         if (rc)
4462             goto out;
4463     }
4464 out:
4465     return rc;
4466 }
4467 
4468 /*
4469  * CMD_UPDATE_STADB.
4470  */
4471 struct ewc_ht_info {
4472     __le16  control1;
4473     __le16  control2;
4474     __le16  control3;
4475 } __packed;
4476 
4477 struct peer_capability_info {
4478     /* Peer type - AP vs. STA.  */
4479     __u8    peer_type;
4480 
4481     /* Basic 802.11 capabilities from assoc resp.  */
4482     __le16  basic_caps;
4483 
4484     /* Set if peer supports 802.11n high throughput (HT).  */
4485     __u8    ht_support;
4486 
4487     /* Valid if HT is supported.  */
4488     __le16  ht_caps;
4489     __u8    extended_ht_caps;
4490     struct ewc_ht_info  ewc_info;
4491 
4492     /* Legacy rate table. Intersection of our rates and peer rates.  */
4493     __u8    legacy_rates[12];
4494 
4495     /* HT rate table. Intersection of our rates and peer rates.  */
4496     __u8    ht_rates[16];
4497     __u8    pad[16];
4498 
4499     /* If set, interoperability mode, no proprietary extensions.  */
4500     __u8    interop;
4501     __u8    pad2;
4502     __u8    station_id;
4503     __le16  amsdu_enabled;
4504 } __packed;
4505 
4506 struct mwl8k_cmd_update_stadb {
4507     struct mwl8k_cmd_pkt header;
4508 
4509     /* See STADB_ACTION_TYPE */
4510     __le32  action;
4511 
4512     /* Peer MAC address */
4513     __u8    peer_addr[ETH_ALEN];
4514 
4515     __le32  reserved;
4516 
4517     /* Peer info - valid during add/update.  */
4518     struct peer_capability_info peer_info;
4519 } __packed;
4520 
4521 #define MWL8K_STA_DB_MODIFY_ENTRY   1
4522 #define MWL8K_STA_DB_DEL_ENTRY      2
4523 
4524 /* Peer Entry flags - used to define the type of the peer node */
4525 #define MWL8K_PEER_TYPE_ACCESSPOINT 2
4526 
4527 static int mwl8k_cmd_update_stadb_add(struct ieee80211_hw *hw,
4528                       struct ieee80211_vif *vif,
4529                       struct ieee80211_sta *sta)
4530 {
4531     struct mwl8k_cmd_update_stadb *cmd;
4532     struct peer_capability_info *p;
4533     u32 rates;
4534     int rc;
4535 
4536     cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4537     if (cmd == NULL)
4538         return -ENOMEM;
4539 
4540     cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_STADB);
4541     cmd->header.length = cpu_to_le16(sizeof(*cmd));
4542     cmd->action = cpu_to_le32(MWL8K_STA_DB_MODIFY_ENTRY);
4543     memcpy(cmd->peer_addr, sta->addr, ETH_ALEN);
4544 
4545     p = &cmd->peer_info;
4546     p->peer_type = MWL8K_PEER_TYPE_ACCESSPOINT;
4547     p->basic_caps = cpu_to_le16(vif->bss_conf.assoc_capability);
4548     p->ht_support = sta->deflink.ht_cap.ht_supported;
4549     p->ht_caps = cpu_to_le16(sta->deflink.ht_cap.cap);
4550     p->extended_ht_caps = (sta->deflink.ht_cap.ampdu_factor & 3) |
4551         ((sta->deflink.ht_cap.ampdu_density & 7) << 2);
4552     if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ)
4553         rates = sta->deflink.supp_rates[NL80211_BAND_2GHZ];
4554     else
4555         rates = sta->deflink.supp_rates[NL80211_BAND_5GHZ] << 5;
4556     legacy_rate_mask_to_array(p->legacy_rates, rates);
4557     memcpy(p->ht_rates, &sta->deflink.ht_cap.mcs, 16);
4558     p->interop = 1;
4559     p->amsdu_enabled = 0;
4560 
4561     rc = mwl8k_post_cmd(hw, &cmd->header);
4562     if (!rc)
4563         rc = p->station_id;
4564     kfree(cmd);
4565 
4566     return rc;
4567 }
4568 
4569 static int mwl8k_cmd_update_stadb_del(struct ieee80211_hw *hw,
4570                       struct ieee80211_vif *vif, u8 *addr)
4571 {
4572     struct mwl8k_cmd_update_stadb *cmd;
4573     int rc;
4574 
4575     cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4576     if (cmd == NULL)
4577         return -ENOMEM;
4578 
4579     cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_STADB);
4580     cmd->header.length = cpu_to_le16(sizeof(*cmd));
4581     cmd->action = cpu_to_le32(MWL8K_STA_DB_DEL_ENTRY);
4582     memcpy(cmd->peer_addr, addr, ETH_ALEN);
4583 
4584     rc = mwl8k_post_cmd(hw, &cmd->header);
4585     kfree(cmd);
4586 
4587     return rc;
4588 }
4589 
4590 
4591 /*
4592  * Interrupt handling.
4593  */
4594 static irqreturn_t mwl8k_interrupt(int irq, void *dev_id)
4595 {
4596     struct ieee80211_hw *hw = dev_id;
4597     struct mwl8k_priv *priv = hw->priv;
4598     u32 status;
4599 
4600     status = ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4601     if (!status)
4602         return IRQ_NONE;
4603 
4604     if (status & MWL8K_A2H_INT_TX_DONE) {
4605         status &= ~MWL8K_A2H_INT_TX_DONE;
4606         tasklet_schedule(&priv->poll_tx_task);
4607     }
4608 
4609     if (status & MWL8K_A2H_INT_RX_READY) {
4610         status &= ~MWL8K_A2H_INT_RX_READY;
4611         tasklet_schedule(&priv->poll_rx_task);
4612     }
4613 
4614     if (status & MWL8K_A2H_INT_BA_WATCHDOG) {
4615         iowrite32(~MWL8K_A2H_INT_BA_WATCHDOG,
4616               priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
4617 
4618         atomic_inc(&priv->watchdog_event_pending);
4619         status &= ~MWL8K_A2H_INT_BA_WATCHDOG;
4620         ieee80211_queue_work(hw, &priv->watchdog_ba_handle);
4621     }
4622 
4623     if (status)
4624         iowrite32(~status, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4625 
4626     if (status & MWL8K_A2H_INT_OPC_DONE) {
4627         if (priv->hostcmd_wait != NULL)
4628             complete(priv->hostcmd_wait);
4629     }
4630 
4631     if (status & MWL8K_A2H_INT_QUEUE_EMPTY) {
4632         if (!mutex_is_locked(&priv->fw_mutex) &&
4633             priv->radio_on && priv->pending_tx_pkts)
4634             mwl8k_tx_start(priv);
4635     }
4636 
4637     return IRQ_HANDLED;
4638 }
4639 
4640 static void mwl8k_tx_poll(struct tasklet_struct *t)
4641 {
4642     struct mwl8k_priv *priv = from_tasklet(priv, t, poll_tx_task);
4643     struct ieee80211_hw *hw = pci_get_drvdata(priv->pdev);
4644     int limit;
4645     int i;
4646 
4647     limit = 32;
4648 
4649     spin_lock(&priv->tx_lock);
4650 
4651     for (i = 0; i < mwl8k_tx_queues(priv); i++)
4652         limit -= mwl8k_txq_reclaim(hw, i, limit, 0);
4653 
4654     if (!priv->pending_tx_pkts && priv->tx_wait != NULL) {
4655         complete(priv->tx_wait);
4656         priv->tx_wait = NULL;
4657     }
4658 
4659     spin_unlock(&priv->tx_lock);
4660 
4661     if (limit) {
4662         writel(~MWL8K_A2H_INT_TX_DONE,
4663                priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4664     } else {
4665         tasklet_schedule(&priv->poll_tx_task);
4666     }
4667 }
4668 
4669 static void mwl8k_rx_poll(struct tasklet_struct *t)
4670 {
4671     struct mwl8k_priv *priv = from_tasklet(priv, t, poll_rx_task);
4672     struct ieee80211_hw *hw = pci_get_drvdata(priv->pdev);
4673     int limit;
4674 
4675     limit = 32;
4676     limit -= rxq_process(hw, 0, limit);
4677     limit -= rxq_refill(hw, 0, limit);
4678 
4679     if (limit) {
4680         writel(~MWL8K_A2H_INT_RX_READY,
4681                priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4682     } else {
4683         tasklet_schedule(&priv->poll_rx_task);
4684     }
4685 }
4686 
4687 
4688 /*
4689  * Core driver operations.
4690  */
4691 static void mwl8k_tx(struct ieee80211_hw *hw,
4692              struct ieee80211_tx_control *control,
4693              struct sk_buff *skb)
4694 {
4695     struct mwl8k_priv *priv = hw->priv;
4696     int index = skb_get_queue_mapping(skb);
4697 
4698     if (!priv->radio_on) {
4699         wiphy_debug(hw->wiphy,
4700                 "dropped TX frame since radio disabled\n");
4701         dev_kfree_skb(skb);
4702         return;
4703     }
4704 
4705     mwl8k_txq_xmit(hw, index, control->sta, skb);
4706 }
4707 
4708 static int mwl8k_start(struct ieee80211_hw *hw)
4709 {
4710     struct mwl8k_priv *priv = hw->priv;
4711     int rc;
4712 
4713     rc = request_irq(priv->pdev->irq, mwl8k_interrupt,
4714              IRQF_SHARED, MWL8K_NAME, hw);
4715     if (rc) {
4716         priv->irq = -1;
4717         wiphy_err(hw->wiphy, "failed to register IRQ handler\n");
4718         return -EIO;
4719     }
4720     priv->irq = priv->pdev->irq;
4721 
4722     /* Enable TX reclaim and RX tasklets.  */
4723     tasklet_enable(&priv->poll_tx_task);
4724     tasklet_enable(&priv->poll_rx_task);
4725 
4726     /* Enable interrupts */
4727     iowrite32(MWL8K_A2H_EVENTS, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
4728     iowrite32(MWL8K_A2H_EVENTS,
4729           priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
4730 
4731     rc = mwl8k_fw_lock(hw);
4732     if (!rc) {
4733         rc = mwl8k_cmd_radio_enable(hw);
4734 
4735         if (!priv->ap_fw) {
4736             if (!rc)
4737                 rc = mwl8k_cmd_enable_sniffer(hw, 0);
4738 
4739             if (!rc)
4740                 rc = mwl8k_cmd_set_pre_scan(hw);
4741 
4742             if (!rc)
4743                 rc = mwl8k_cmd_set_post_scan(hw,
4744                         "\x00\x00\x00\x00\x00\x00");
4745         }
4746 
4747         if (!rc)
4748             rc = mwl8k_cmd_set_rateadapt_mode(hw, 0);
4749 
4750         if (!rc)
4751             rc = mwl8k_cmd_set_wmm_mode(hw, 0);
4752 
4753         mwl8k_fw_unlock(hw);
4754     }
4755 
4756     if (rc) {
4757         iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
4758         free_irq(priv->pdev->irq, hw);
4759         priv->irq = -1;
4760         tasklet_disable(&priv->poll_tx_task);
4761         tasklet_disable(&priv->poll_rx_task);
4762     } else {
4763         ieee80211_wake_queues(hw);
4764     }
4765 
4766     return rc;
4767 }
4768 
4769 static void mwl8k_stop(struct ieee80211_hw *hw)
4770 {
4771     struct mwl8k_priv *priv = hw->priv;
4772     int i;
4773 
4774     if (!priv->hw_restart_in_progress)
4775         mwl8k_cmd_radio_disable(hw);
4776 
4777     ieee80211_stop_queues(hw);
4778 
4779     /* Disable interrupts */
4780     iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
4781     if (priv->irq != -1) {
4782         free_irq(priv->pdev->irq, hw);
4783         priv->irq = -1;
4784     }
4785 
4786     /* Stop finalize join worker */
4787     cancel_work_sync(&priv->finalize_join_worker);
4788     cancel_work_sync(&priv->watchdog_ba_handle);
4789     if (priv->beacon_skb != NULL)
4790         dev_kfree_skb(priv->beacon_skb);
4791 
4792     /* Stop TX reclaim and RX tasklets.  */
4793     tasklet_disable(&priv->poll_tx_task);
4794     tasklet_disable(&priv->poll_rx_task);
4795 
4796     /* Return all skbs to mac80211 */
4797     for (i = 0; i < mwl8k_tx_queues(priv); i++)
4798         mwl8k_txq_reclaim(hw, i, INT_MAX, 1);
4799 }
4800 
4801 static int mwl8k_reload_firmware(struct ieee80211_hw *hw, char *fw_image);
4802 
4803 static int mwl8k_add_interface(struct ieee80211_hw *hw,
4804                    struct ieee80211_vif *vif)
4805 {
4806     struct mwl8k_priv *priv = hw->priv;
4807     struct mwl8k_vif *mwl8k_vif;
4808     u32 macids_supported;
4809     int macid, rc;
4810     struct mwl8k_device_info *di;
4811 
4812     /*
4813      * Reject interface creation if sniffer mode is active, as
4814      * STA operation is mutually exclusive with hardware sniffer
4815      * mode.  (Sniffer mode is only used on STA firmware.)
4816      */
4817     if (priv->sniffer_enabled) {
4818         wiphy_info(hw->wiphy,
4819                "unable to create STA interface because sniffer mode is enabled\n");
4820         return -EINVAL;
4821     }
4822 
4823     di = priv->device_info;
4824     switch (vif->type) {
4825     case NL80211_IFTYPE_AP:
4826         if (!priv->ap_fw && di->fw_image_ap) {
4827             /* we must load the ap fw to meet this request */
4828             if (!list_empty(&priv->vif_list))
4829                 return -EBUSY;
4830             rc = mwl8k_reload_firmware(hw, di->fw_image_ap);
4831             if (rc)
4832                 return rc;
4833         }
4834         macids_supported = priv->ap_macids_supported;
4835         break;
4836     case NL80211_IFTYPE_STATION:
4837         if (priv->ap_fw && di->fw_image_sta) {
4838             if (!list_empty(&priv->vif_list)) {
4839                 wiphy_warn(hw->wiphy, "AP interface is running.\n"
4840                        "Adding STA interface for WDS");
4841             } else {
4842                 /* we must load the sta fw to
4843                  * meet this request.
4844                  */
4845                 rc = mwl8k_reload_firmware(hw,
4846                                di->fw_image_sta);
4847                 if (rc)
4848                     return rc;
4849             }
4850         }
4851         macids_supported = priv->sta_macids_supported;
4852         break;
4853     default:
4854         return -EINVAL;
4855     }
4856 
4857     macid = ffs(macids_supported & ~priv->macids_used);
4858     if (!macid--)
4859         return -EBUSY;
4860 
4861     /* Setup driver private area. */
4862     mwl8k_vif = MWL8K_VIF(vif);
4863     memset(mwl8k_vif, 0, sizeof(*mwl8k_vif));
4864     mwl8k_vif->vif = vif;
4865     mwl8k_vif->macid = macid;
4866     mwl8k_vif->seqno = 0;
4867     memcpy(mwl8k_vif->bssid, vif->addr, ETH_ALEN);
4868     mwl8k_vif->is_hw_crypto_enabled = false;
4869 
4870     /* Set the mac address.  */
4871     mwl8k_cmd_set_mac_addr(hw, vif, vif->addr);
4872 
4873     if (vif->type == NL80211_IFTYPE_AP)
4874         mwl8k_cmd_set_new_stn_add_self(hw, vif);
4875 
4876     priv->macids_used |= 1 << mwl8k_vif->macid;
4877     list_add_tail(&mwl8k_vif->list, &priv->vif_list);
4878 
4879     return 0;
4880 }
4881 
4882 static void mwl8k_remove_vif(struct mwl8k_priv *priv, struct mwl8k_vif *vif)
4883 {
4884     /* Has ieee80211_restart_hw re-added the removed interfaces? */
4885     if (!priv->macids_used)
4886         return;
4887 
4888     priv->macids_used &= ~(1 << vif->macid);
4889     list_del(&vif->list);
4890 }
4891 
4892 static void mwl8k_remove_interface(struct ieee80211_hw *hw,
4893                    struct ieee80211_vif *vif)
4894 {
4895     struct mwl8k_priv *priv = hw->priv;
4896     struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4897 
4898     if (vif->type == NL80211_IFTYPE_AP)
4899         mwl8k_cmd_set_new_stn_del(hw, vif, vif->addr);
4900 
4901     mwl8k_cmd_del_mac_addr(hw, vif, vif->addr);
4902 
4903     mwl8k_remove_vif(priv, mwl8k_vif);
4904 }
4905 
4906 static void mwl8k_hw_restart_work(struct work_struct *work)
4907 {
4908     struct mwl8k_priv *priv =
4909         container_of(work, struct mwl8k_priv, fw_reload);
4910     struct ieee80211_hw *hw = priv->hw;
4911     struct mwl8k_device_info *di;
4912     int rc;
4913 
4914     /* If some command is waiting for a response, clear it */
4915     if (priv->hostcmd_wait != NULL) {
4916         complete(priv->hostcmd_wait);
4917         priv->hostcmd_wait = NULL;
4918     }
4919 
4920     priv->hw_restart_owner = current;
4921     di = priv->device_info;
4922     mwl8k_fw_lock(hw);
4923 
4924     if (priv->ap_fw)
4925         rc = mwl8k_reload_firmware(hw, di->fw_image_ap);
4926     else
4927         rc = mwl8k_reload_firmware(hw, di->fw_image_sta);
4928 
4929     if (rc)
4930         goto fail;
4931 
4932     priv->hw_restart_owner = NULL;
4933     priv->hw_restart_in_progress = false;
4934 
4935     /*
4936      * This unlock will wake up the queues and
4937      * also opens the command path for other
4938      * commands
4939      */
4940     mwl8k_fw_unlock(hw);
4941 
4942     ieee80211_restart_hw(hw);
4943 
4944     wiphy_err(hw->wiphy, "Firmware restarted successfully\n");
4945 
4946     return;
4947 fail:
4948     mwl8k_fw_unlock(hw);
4949 
4950     wiphy_err(hw->wiphy, "Firmware restart failed\n");
4951 }
4952 
4953 static int mwl8k_config(struct ieee80211_hw *hw, u32 changed)
4954 {
4955     struct ieee80211_conf *conf = &hw->conf;
4956     struct mwl8k_priv *priv = hw->priv;
4957     int rc;
4958 
4959     rc = mwl8k_fw_lock(hw);
4960     if (rc)
4961         return rc;
4962 
4963     if (conf->flags & IEEE80211_CONF_IDLE)
4964         rc = mwl8k_cmd_radio_disable(hw);
4965     else
4966         rc = mwl8k_cmd_radio_enable(hw);
4967     if (rc)
4968         goto out;
4969 
4970     if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
4971         rc = mwl8k_cmd_set_rf_channel(hw, conf);
4972         if (rc)
4973             goto out;
4974     }
4975 
4976     if (conf->power_level > 18)
4977         conf->power_level = 18;
4978 
4979     if (priv->ap_fw) {
4980 
4981         if (conf->flags & IEEE80211_CONF_CHANGE_POWER) {
4982             rc = mwl8k_cmd_tx_power(hw, conf, conf->power_level);
4983             if (rc)
4984                 goto out;
4985         }
4986 
4987 
4988     } else {
4989         rc = mwl8k_cmd_rf_tx_power(hw, conf->power_level);
4990         if (rc)
4991             goto out;
4992         rc = mwl8k_cmd_mimo_config(hw, 0x7, 0x7);
4993     }
4994 
4995 out:
4996     mwl8k_fw_unlock(hw);
4997 
4998     return rc;
4999 }
5000 
5001 static void
5002 mwl8k_bss_info_changed_sta(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5003                struct ieee80211_bss_conf *info, u32 changed)
5004 {
5005     struct mwl8k_priv *priv = hw->priv;
5006     u32 ap_legacy_rates = 0;
5007     u8 ap_mcs_rates[16];
5008     int rc;
5009 
5010     if (mwl8k_fw_lock(hw))
5011         return;
5012 
5013     /*
5014      * No need to capture a beacon if we're no longer associated.
5015      */
5016     if ((changed & BSS_CHANGED_ASSOC) && !vif->cfg.assoc)
5017         priv->capture_beacon = false;
5018 
5019     /*
5020      * Get the AP's legacy and MCS rates.
5021      */
5022     if (vif->cfg.assoc) {
5023         struct ieee80211_sta *ap;
5024 
5025         rcu_read_lock();
5026 
5027         ap = ieee80211_find_sta(vif, vif->bss_conf.bssid);
5028         if (ap == NULL) {
5029             rcu_read_unlock();
5030             goto out;
5031         }
5032 
5033         if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ) {
5034             ap_legacy_rates = ap->deflink.supp_rates[NL80211_BAND_2GHZ];
5035         } else {
5036             ap_legacy_rates =
5037                 ap->deflink.supp_rates[NL80211_BAND_5GHZ] << 5;
5038         }
5039         memcpy(ap_mcs_rates, &ap->deflink.ht_cap.mcs, 16);
5040 
5041         rcu_read_unlock();
5042 
5043         if (changed & BSS_CHANGED_ASSOC) {
5044             if (!priv->ap_fw) {
5045                 rc = mwl8k_cmd_set_rate(hw, vif,
5046                             ap_legacy_rates,
5047                             ap_mcs_rates);
5048                 if (rc)
5049                     goto out;
5050 
5051                 rc = mwl8k_cmd_use_fixed_rate_sta(hw);
5052                 if (rc)
5053                     goto out;
5054             } else {
5055                 int idx;
5056                 int rate;
5057 
5058                 /* Use AP firmware specific rate command.
5059                  */
5060                 idx = ffs(vif->bss_conf.basic_rates);
5061                 if (idx)
5062                     idx--;
5063 
5064                 if (hw->conf.chandef.chan->band ==
5065                     NL80211_BAND_2GHZ)
5066                     rate = mwl8k_rates_24[idx].hw_value;
5067                 else
5068                     rate = mwl8k_rates_50[idx].hw_value;
5069 
5070                 mwl8k_cmd_use_fixed_rate_ap(hw, rate, rate);
5071             }
5072         }
5073     }
5074 
5075     if (changed & BSS_CHANGED_ERP_PREAMBLE) {
5076         rc = mwl8k_set_radio_preamble(hw,
5077                 vif->bss_conf.use_short_preamble);
5078         if (rc)
5079             goto out;
5080     }
5081 
5082     if ((changed & BSS_CHANGED_ERP_SLOT) && !priv->ap_fw)  {
5083         rc = mwl8k_cmd_set_slot(hw, vif->bss_conf.use_short_slot);
5084         if (rc)
5085             goto out;
5086     }
5087 
5088     if (vif->cfg.assoc && !priv->ap_fw &&
5089         (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_ERP_CTS_PROT |
5090             BSS_CHANGED_HT))) {
5091         rc = mwl8k_cmd_set_aid(hw, vif, ap_legacy_rates);
5092         if (rc)
5093             goto out;
5094     }
5095 
5096     if (vif->cfg.assoc &&
5097         (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_BEACON_INT))) {
5098         /*
5099          * Finalize the join.  Tell rx handler to process
5100          * next beacon from our BSSID.
5101          */
5102         memcpy(priv->capture_bssid, vif->bss_conf.bssid, ETH_ALEN);
5103         priv->capture_beacon = true;
5104     }
5105 
5106 out:
5107     mwl8k_fw_unlock(hw);
5108 }
5109 
5110 static void
5111 mwl8k_bss_info_changed_ap(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5112               struct ieee80211_bss_conf *info, u32 changed)
5113 {
5114     int rc;
5115 
5116     if (mwl8k_fw_lock(hw))
5117         return;
5118 
5119     if (changed & BSS_CHANGED_ERP_PREAMBLE) {
5120         rc = mwl8k_set_radio_preamble(hw,
5121                 vif->bss_conf.use_short_preamble);
5122         if (rc)
5123             goto out;
5124     }
5125 
5126     if (changed & BSS_CHANGED_BASIC_RATES) {
5127         int idx;
5128         int rate;
5129 
5130         /*
5131          * Use lowest supported basic rate for multicasts
5132          * and management frames (such as probe responses --
5133          * beacons will always go out at 1 Mb/s).
5134          */
5135         idx = ffs(vif->bss_conf.basic_rates);
5136         if (idx)
5137             idx--;
5138 
5139         if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ)
5140             rate = mwl8k_rates_24[idx].hw_value;
5141         else
5142             rate = mwl8k_rates_50[idx].hw_value;
5143 
5144         mwl8k_cmd_use_fixed_rate_ap(hw, rate, rate);
5145     }
5146 
5147     if (changed & (BSS_CHANGED_BEACON_INT | BSS_CHANGED_BEACON)) {
5148         struct sk_buff *skb;
5149 
5150         skb = ieee80211_beacon_get(hw, vif, 0);
5151         if (skb != NULL) {
5152             mwl8k_cmd_set_beacon(hw, vif, skb->data, skb->len);
5153             kfree_skb(skb);
5154         }
5155     }
5156 
5157     if (changed & BSS_CHANGED_BEACON_ENABLED)
5158         mwl8k_cmd_bss_start(hw, vif, info->enable_beacon);
5159 
5160 out:
5161     mwl8k_fw_unlock(hw);
5162 }
5163 
5164 static void
5165 mwl8k_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5166                struct ieee80211_bss_conf *info, u64 changed)
5167 {
5168     if (vif->type == NL80211_IFTYPE_STATION)
5169         mwl8k_bss_info_changed_sta(hw, vif, info, changed);
5170     if (vif->type == NL80211_IFTYPE_AP)
5171         mwl8k_bss_info_changed_ap(hw, vif, info, changed);
5172 }
5173 
5174 static u64 mwl8k_prepare_multicast(struct ieee80211_hw *hw,
5175                    struct netdev_hw_addr_list *mc_list)
5176 {
5177     struct mwl8k_cmd_pkt *cmd;
5178 
5179     /*
5180      * Synthesize and return a command packet that programs the
5181      * hardware multicast address filter.  At this point we don't
5182      * know whether FIF_ALLMULTI is being requested, but if it is,
5183      * we'll end up throwing this packet away and creating a new
5184      * one in mwl8k_configure_filter().
5185      */
5186     cmd = __mwl8k_cmd_mac_multicast_adr(hw, 0, mc_list);
5187 
5188     return (unsigned long)cmd;
5189 }
5190 
5191 static int
5192 mwl8k_configure_filter_sniffer(struct ieee80211_hw *hw,
5193                    unsigned int changed_flags,
5194                    unsigned int *total_flags)
5195 {
5196     struct mwl8k_priv *priv = hw->priv;
5197 
5198     /*
5199      * Hardware sniffer mode is mutually exclusive with STA
5200      * operation, so refuse to enable sniffer mode if a STA
5201      * interface is active.
5202      */
5203     if (!list_empty(&priv->vif_list)) {
5204         if (net_ratelimit())
5205             wiphy_info(hw->wiphy,
5206                    "not enabling sniffer mode because STA interface is active\n");
5207         return 0;
5208     }
5209 
5210     if (!priv->sniffer_enabled) {
5211         if (mwl8k_cmd_enable_sniffer(hw, 1))
5212             return 0;
5213         priv->sniffer_enabled = true;
5214     }
5215 
5216     *total_flags &= FIF_ALLMULTI |
5217             FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL |
5218             FIF_OTHER_BSS;
5219 
5220     return 1;
5221 }
5222 
5223 static struct mwl8k_vif *mwl8k_first_vif(struct mwl8k_priv *priv)
5224 {
5225     if (!list_empty(&priv->vif_list))
5226         return list_entry(priv->vif_list.next, struct mwl8k_vif, list);
5227 
5228     return NULL;
5229 }
5230 
5231 static void mwl8k_configure_filter(struct ieee80211_hw *hw,
5232                    unsigned int changed_flags,
5233                    unsigned int *total_flags,
5234                    u64 multicast)
5235 {
5236     struct mwl8k_priv *priv = hw->priv;
5237     struct mwl8k_cmd_pkt *cmd = (void *)(unsigned long)multicast;
5238 
5239     /*
5240      * AP firmware doesn't allow fine-grained control over
5241      * the receive filter.
5242      */
5243     if (priv->ap_fw) {
5244         *total_flags &= FIF_ALLMULTI | FIF_BCN_PRBRESP_PROMISC;
5245         kfree(cmd);
5246         return;
5247     }
5248 
5249     /*
5250      * Enable hardware sniffer mode if FIF_CONTROL or
5251      * FIF_OTHER_BSS is requested.
5252      */
5253     if (*total_flags & (FIF_CONTROL | FIF_OTHER_BSS) &&
5254         mwl8k_configure_filter_sniffer(hw, changed_flags, total_flags)) {
5255         kfree(cmd);
5256         return;
5257     }
5258 
5259     /* Clear unsupported feature flags */
5260     *total_flags &= FIF_ALLMULTI | FIF_BCN_PRBRESP_PROMISC;
5261 
5262     if (mwl8k_fw_lock(hw)) {
5263         kfree(cmd);
5264         return;
5265     }
5266 
5267     if (priv->sniffer_enabled) {
5268         mwl8k_cmd_enable_sniffer(hw, 0);
5269         priv->sniffer_enabled = false;
5270     }
5271 
5272     if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
5273         if (*total_flags & FIF_BCN_PRBRESP_PROMISC) {
5274             /*
5275              * Disable the BSS filter.
5276              */
5277             mwl8k_cmd_set_pre_scan(hw);
5278         } else {
5279             struct mwl8k_vif *mwl8k_vif;
5280             const u8 *bssid;
5281 
5282             /*
5283              * Enable the BSS filter.
5284              *
5285              * If there is an active STA interface, use that
5286              * interface's BSSID, otherwise use a dummy one
5287              * (where the OUI part needs to be nonzero for
5288              * the BSSID to be accepted by POST_SCAN).
5289              */
5290             mwl8k_vif = mwl8k_first_vif(priv);
5291             if (mwl8k_vif != NULL)
5292                 bssid = mwl8k_vif->vif->bss_conf.bssid;
5293             else
5294                 bssid = "\x01\x00\x00\x00\x00\x00";
5295 
5296             mwl8k_cmd_set_post_scan(hw, bssid);
5297         }
5298     }
5299 
5300     /*
5301      * If FIF_ALLMULTI is being requested, throw away the command
5302      * packet that ->prepare_multicast() built and replace it with
5303      * a command packet that enables reception of all multicast
5304      * packets.
5305      */
5306     if (*total_flags & FIF_ALLMULTI) {
5307         kfree(cmd);
5308         cmd = __mwl8k_cmd_mac_multicast_adr(hw, 1, NULL);
5309     }
5310 
5311     if (cmd != NULL) {
5312         mwl8k_post_cmd(hw, cmd);
5313         kfree(cmd);
5314     }
5315 
5316     mwl8k_fw_unlock(hw);
5317 }
5318 
5319 static int mwl8k_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
5320 {
5321     return mwl8k_cmd_set_rts_threshold(hw, value);
5322 }
5323 
5324 static int mwl8k_sta_remove(struct ieee80211_hw *hw,
5325                 struct ieee80211_vif *vif,
5326                 struct ieee80211_sta *sta)
5327 {
5328     struct mwl8k_priv *priv = hw->priv;
5329 
5330     if (priv->ap_fw)
5331         return mwl8k_cmd_set_new_stn_del(hw, vif, sta->addr);
5332     else
5333         return mwl8k_cmd_update_stadb_del(hw, vif, sta->addr);
5334 }
5335 
5336 static int mwl8k_sta_add(struct ieee80211_hw *hw,
5337              struct ieee80211_vif *vif,
5338              struct ieee80211_sta *sta)
5339 {
5340     struct mwl8k_priv *priv = hw->priv;
5341     int ret;
5342     int i;
5343     struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
5344     struct ieee80211_key_conf *key;
5345 
5346     if (!priv->ap_fw) {
5347         ret = mwl8k_cmd_update_stadb_add(hw, vif, sta);
5348         if (ret >= 0) {
5349             MWL8K_STA(sta)->peer_id = ret;
5350             if (sta->deflink.ht_cap.ht_supported)
5351                 MWL8K_STA(sta)->is_ampdu_allowed = true;
5352             ret = 0;
5353         }
5354 
5355     } else {
5356         ret = mwl8k_cmd_set_new_stn_add(hw, vif, sta);
5357     }
5358 
5359     for (i = 0; i < NUM_WEP_KEYS; i++) {
5360         key = IEEE80211_KEY_CONF(mwl8k_vif->wep_key_conf[i].key);
5361         if (mwl8k_vif->wep_key_conf[i].enabled)
5362             mwl8k_set_key(hw, SET_KEY, vif, sta, key);
5363     }
5364     return ret;
5365 }
5366 
5367 static int mwl8k_conf_tx(struct ieee80211_hw *hw,
5368              struct ieee80211_vif *vif,
5369              unsigned int link_id, u16 queue,
5370              const struct ieee80211_tx_queue_params *params)
5371 {
5372     struct mwl8k_priv *priv = hw->priv;
5373     int rc;
5374 
5375     rc = mwl8k_fw_lock(hw);
5376     if (!rc) {
5377         BUG_ON(queue > MWL8K_TX_WMM_QUEUES - 1);
5378         memcpy(&priv->wmm_params[queue], params, sizeof(*params));
5379 
5380         if (!priv->wmm_enabled)
5381             rc = mwl8k_cmd_set_wmm_mode(hw, 1);
5382 
5383         if (!rc) {
5384             int q = MWL8K_TX_WMM_QUEUES - 1 - queue;
5385             rc = mwl8k_cmd_set_edca_params(hw, q,
5386                                params->cw_min,
5387                                params->cw_max,
5388                                params->aifs,
5389                                params->txop);
5390         }
5391 
5392         mwl8k_fw_unlock(hw);
5393     }
5394 
5395     return rc;
5396 }
5397 
5398 static int mwl8k_get_stats(struct ieee80211_hw *hw,
5399                struct ieee80211_low_level_stats *stats)
5400 {
5401     return mwl8k_cmd_get_stat(hw, stats);
5402 }
5403 
5404 static int mwl8k_get_survey(struct ieee80211_hw *hw, int idx,
5405                 struct survey_info *survey)
5406 {
5407     struct mwl8k_priv *priv = hw->priv;
5408     struct ieee80211_conf *conf = &hw->conf;
5409     struct ieee80211_supported_band *sband;
5410 
5411     if (priv->ap_fw) {
5412         sband = hw->wiphy->bands[NL80211_BAND_2GHZ];
5413 
5414         if (sband && idx >= sband->n_channels) {
5415             idx -= sband->n_channels;
5416             sband = NULL;
5417         }
5418 
5419         if (!sband)
5420             sband = hw->wiphy->bands[NL80211_BAND_5GHZ];
5421 
5422         if (!sband || idx >= sband->n_channels)
5423             return -ENOENT;
5424 
5425         memcpy(survey, &priv->survey[idx], sizeof(*survey));
5426         survey->channel = &sband->channels[idx];
5427 
5428         return 0;
5429     }
5430 
5431     if (idx != 0)
5432         return -ENOENT;
5433 
5434     survey->channel = conf->chandef.chan;
5435     survey->filled = SURVEY_INFO_NOISE_DBM;
5436     survey->noise = priv->noise;
5437 
5438     return 0;
5439 }
5440 
5441 #define MAX_AMPDU_ATTEMPTS 5
5442 
5443 static int
5444 mwl8k_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5445            struct ieee80211_ampdu_params *params)
5446 {
5447     struct ieee80211_sta *sta = params->sta;
5448     enum ieee80211_ampdu_mlme_action action = params->action;
5449     u16 tid = params->tid;
5450     u16 *ssn = &params->ssn;
5451     u8 buf_size = params->buf_size;
5452     int i, rc = 0;
5453     struct mwl8k_priv *priv = hw->priv;
5454     struct mwl8k_ampdu_stream *stream;
5455     u8 *addr = sta->addr, idx;
5456     struct mwl8k_sta *sta_info = MWL8K_STA(sta);
5457 
5458     if (!ieee80211_hw_check(hw, AMPDU_AGGREGATION))
5459         return -ENOTSUPP;
5460 
5461     spin_lock(&priv->stream_lock);
5462     stream = mwl8k_lookup_stream(hw, addr, tid);
5463 
5464     switch (action) {
5465     case IEEE80211_AMPDU_RX_START:
5466     case IEEE80211_AMPDU_RX_STOP:
5467         break;
5468     case IEEE80211_AMPDU_TX_START:
5469         /* By the time we get here the hw queues may contain outgoing
5470          * packets for this RA/TID that are not part of this BA
5471          * session.  The hw will assign sequence numbers to these
5472          * packets as they go out.  So if we query the hw for its next
5473          * sequence number and use that for the SSN here, it may end up
5474          * being wrong, which will lead to sequence number mismatch at
5475          * the recipient.  To avoid this, we reset the sequence number
5476          * to O for the first MPDU in this BA stream.
5477          */
5478         *ssn = 0;
5479         if (stream == NULL) {
5480             /* This means that somebody outside this driver called
5481              * ieee80211_start_tx_ba_session.  This is unexpected
5482              * because we do our own rate control.  Just warn and
5483              * move on.
5484              */
5485             wiphy_warn(hw->wiphy, "Unexpected call to %s.  "
5486                    "Proceeding anyway.\n", __func__);
5487             stream = mwl8k_add_stream(hw, sta, tid);
5488         }
5489         if (stream == NULL) {
5490             wiphy_debug(hw->wiphy, "no free AMPDU streams\n");
5491             rc = -EBUSY;
5492             break;
5493         }
5494         stream->state = AMPDU_STREAM_IN_PROGRESS;
5495 
5496         /* Release the lock before we do the time consuming stuff */
5497         spin_unlock(&priv->stream_lock);
5498         for (i = 0; i < MAX_AMPDU_ATTEMPTS; i++) {
5499 
5500             /* Check if link is still valid */
5501             if (!sta_info->is_ampdu_allowed) {
5502                 spin_lock(&priv->stream_lock);
5503                 mwl8k_remove_stream(hw, stream);
5504                 spin_unlock(&priv->stream_lock);
5505                 return -EBUSY;
5506             }
5507 
5508             rc = mwl8k_check_ba(hw, stream, vif);
5509 
5510             /* If HW restart is in progress mwl8k_post_cmd will
5511              * return -EBUSY. Avoid retrying mwl8k_check_ba in
5512              * such cases
5513              */
5514             if (!rc || rc == -EBUSY)
5515                 break;
5516             /*
5517              * HW queues take time to be flushed, give them
5518              * sufficient time
5519              */
5520 
5521             msleep(1000);
5522         }
5523         spin_lock(&priv->stream_lock);
5524         if (rc) {
5525             wiphy_err(hw->wiphy, "Stream for tid %d busy after %d"
5526                 " attempts\n", tid, MAX_AMPDU_ATTEMPTS);
5527             mwl8k_remove_stream(hw, stream);
5528             rc = -EBUSY;
5529             break;
5530         }
5531         rc = IEEE80211_AMPDU_TX_START_IMMEDIATE;
5532         break;
5533     case IEEE80211_AMPDU_TX_STOP_CONT:
5534     case IEEE80211_AMPDU_TX_STOP_FLUSH:
5535     case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
5536         if (stream) {
5537             if (stream->state == AMPDU_STREAM_ACTIVE) {
5538                 idx = stream->idx;
5539                 spin_unlock(&priv->stream_lock);
5540                 mwl8k_destroy_ba(hw, idx);
5541                 spin_lock(&priv->stream_lock);
5542             }
5543             mwl8k_remove_stream(hw, stream);
5544         }
5545         ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
5546         break;
5547     case IEEE80211_AMPDU_TX_OPERATIONAL:
5548         BUG_ON(stream == NULL);
5549         BUG_ON(stream->state != AMPDU_STREAM_IN_PROGRESS);
5550         spin_unlock(&priv->stream_lock);
5551         rc = mwl8k_create_ba(hw, stream, buf_size, vif);
5552         spin_lock(&priv->stream_lock);
5553         if (!rc)
5554             stream->state = AMPDU_STREAM_ACTIVE;
5555         else {
5556             idx = stream->idx;
5557             spin_unlock(&priv->stream_lock);
5558             mwl8k_destroy_ba(hw, idx);
5559             spin_lock(&priv->stream_lock);
5560             wiphy_debug(hw->wiphy,
5561                 "Failed adding stream for sta %pM tid %d\n",
5562                 addr, tid);
5563             mwl8k_remove_stream(hw, stream);
5564         }
5565         break;
5566 
5567     default:
5568         rc = -ENOTSUPP;
5569     }
5570 
5571     spin_unlock(&priv->stream_lock);
5572     return rc;
5573 }
5574 
5575 static void mwl8k_sw_scan_start(struct ieee80211_hw *hw,
5576                 struct ieee80211_vif *vif,
5577                 const u8 *mac_addr)
5578 {
5579     struct mwl8k_priv *priv = hw->priv;
5580     u8 tmp;
5581 
5582     if (!priv->ap_fw)
5583         return;
5584 
5585     /* clear all stats */
5586     priv->channel_time = 0;
5587     ioread32(priv->regs + BBU_RXRDY_CNT_REG);
5588     ioread32(priv->regs + NOK_CCA_CNT_REG);
5589     mwl8k_cmd_bbp_reg_access(priv->hw, 0, BBU_AVG_NOISE_VAL, &tmp);
5590 
5591     priv->sw_scan_start = true;
5592 }
5593 
5594 static void mwl8k_sw_scan_complete(struct ieee80211_hw *hw,
5595                    struct ieee80211_vif *vif)
5596 {
5597     struct mwl8k_priv *priv = hw->priv;
5598     u8 tmp;
5599 
5600     if (!priv->ap_fw)
5601         return;
5602 
5603     priv->sw_scan_start = false;
5604 
5605     /* clear all stats */
5606     priv->channel_time = 0;
5607     ioread32(priv->regs + BBU_RXRDY_CNT_REG);
5608     ioread32(priv->regs + NOK_CCA_CNT_REG);
5609     mwl8k_cmd_bbp_reg_access(priv->hw, 0, BBU_AVG_NOISE_VAL, &tmp);
5610 }
5611 
5612 static const struct ieee80211_ops mwl8k_ops = {
5613     .tx         = mwl8k_tx,
5614     .start          = mwl8k_start,
5615     .stop           = mwl8k_stop,
5616     .add_interface      = mwl8k_add_interface,
5617     .remove_interface   = mwl8k_remove_interface,
5618     .config         = mwl8k_config,
5619     .bss_info_changed   = mwl8k_bss_info_changed,
5620     .prepare_multicast  = mwl8k_prepare_multicast,
5621     .configure_filter   = mwl8k_configure_filter,
5622     .set_key                = mwl8k_set_key,
5623     .set_rts_threshold  = mwl8k_set_rts_threshold,
5624     .sta_add        = mwl8k_sta_add,
5625     .sta_remove     = mwl8k_sta_remove,
5626     .conf_tx        = mwl8k_conf_tx,
5627     .get_stats      = mwl8k_get_stats,
5628     .get_survey     = mwl8k_get_survey,
5629     .ampdu_action       = mwl8k_ampdu_action,
5630     .sw_scan_start      = mwl8k_sw_scan_start,
5631     .sw_scan_complete   = mwl8k_sw_scan_complete,
5632 };
5633 
5634 static void mwl8k_finalize_join_worker(struct work_struct *work)
5635 {
5636     struct mwl8k_priv *priv =
5637         container_of(work, struct mwl8k_priv, finalize_join_worker);
5638     struct sk_buff *skb = priv->beacon_skb;
5639     struct ieee80211_mgmt *mgmt = (void *)skb->data;
5640     int len = skb->len - offsetof(struct ieee80211_mgmt, u.beacon.variable);
5641     const u8 *tim = cfg80211_find_ie(WLAN_EID_TIM,
5642                      mgmt->u.beacon.variable, len);
5643     int dtim_period = 1;
5644 
5645     if (tim && tim[1] >= 2)
5646         dtim_period = tim[3];
5647 
5648     mwl8k_cmd_finalize_join(priv->hw, skb->data, skb->len, dtim_period);
5649 
5650     dev_kfree_skb(skb);
5651     priv->beacon_skb = NULL;
5652 }
5653 
5654 enum {
5655     MWL8363 = 0,
5656     MWL8687,
5657     MWL8366,
5658     MWL8764,
5659 };
5660 
5661 #define MWL8K_8366_AP_FW_API 3
5662 #define _MWL8K_8366_AP_FW(api) "mwl8k/fmimage_8366_ap-" #api ".fw"
5663 #define MWL8K_8366_AP_FW(api) _MWL8K_8366_AP_FW(api)
5664 
5665 #define MWL8K_8764_AP_FW_API 1
5666 #define _MWL8K_8764_AP_FW(api) "mwl8k/fmimage_8764_ap-" #api ".fw"
5667 #define MWL8K_8764_AP_FW(api) _MWL8K_8764_AP_FW(api)
5668 
5669 static struct mwl8k_device_info mwl8k_info_tbl[] = {
5670     [MWL8363] = {
5671         .part_name  = "88w8363",
5672         .helper_image   = "mwl8k/helper_8363.fw",
5673         .fw_image_sta   = "mwl8k/fmimage_8363.fw",
5674     },
5675     [MWL8687] = {
5676         .part_name  = "88w8687",
5677         .helper_image   = "mwl8k/helper_8687.fw",
5678         .fw_image_sta   = "mwl8k/fmimage_8687.fw",
5679     },
5680     [MWL8366] = {
5681         .part_name  = "88w8366",
5682         .helper_image   = "mwl8k/helper_8366.fw",
5683         .fw_image_sta   = "mwl8k/fmimage_8366.fw",
5684         .fw_image_ap    = MWL8K_8366_AP_FW(MWL8K_8366_AP_FW_API),
5685         .fw_api_ap  = MWL8K_8366_AP_FW_API,
5686         .ap_rxd_ops = &rxd_ap_ops,
5687     },
5688     [MWL8764] = {
5689         .part_name  = "88w8764",
5690         .fw_image_ap    = MWL8K_8764_AP_FW(MWL8K_8764_AP_FW_API),
5691         .fw_api_ap  = MWL8K_8764_AP_FW_API,
5692         .ap_rxd_ops = &rxd_ap_ops,
5693     },
5694 };
5695 
5696 MODULE_FIRMWARE("mwl8k/helper_8363.fw");
5697 MODULE_FIRMWARE("mwl8k/fmimage_8363.fw");
5698 MODULE_FIRMWARE("mwl8k/helper_8687.fw");
5699 MODULE_FIRMWARE("mwl8k/fmimage_8687.fw");
5700 MODULE_FIRMWARE("mwl8k/helper_8366.fw");
5701 MODULE_FIRMWARE("mwl8k/fmimage_8366.fw");
5702 MODULE_FIRMWARE(MWL8K_8366_AP_FW(MWL8K_8366_AP_FW_API));
5703 
5704 static const struct pci_device_id mwl8k_pci_id_table[] = {
5705     { PCI_VDEVICE(MARVELL, 0x2a0a), .driver_data = MWL8363, },
5706     { PCI_VDEVICE(MARVELL, 0x2a0c), .driver_data = MWL8363, },
5707     { PCI_VDEVICE(MARVELL, 0x2a24), .driver_data = MWL8363, },
5708     { PCI_VDEVICE(MARVELL, 0x2a2b), .driver_data = MWL8687, },
5709     { PCI_VDEVICE(MARVELL, 0x2a30), .driver_data = MWL8687, },
5710     { PCI_VDEVICE(MARVELL, 0x2a40), .driver_data = MWL8366, },
5711     { PCI_VDEVICE(MARVELL, 0x2a41), .driver_data = MWL8366, },
5712     { PCI_VDEVICE(MARVELL, 0x2a42), .driver_data = MWL8366, },
5713     { PCI_VDEVICE(MARVELL, 0x2a43), .driver_data = MWL8366, },
5714     { PCI_VDEVICE(MARVELL, 0x2b36), .driver_data = MWL8764, },
5715     { },
5716 };
5717 MODULE_DEVICE_TABLE(pci, mwl8k_pci_id_table);
5718 
5719 static int mwl8k_request_alt_fw(struct mwl8k_priv *priv)
5720 {
5721     int rc;
5722     printk(KERN_ERR "%s: Error requesting preferred fw %s.\n"
5723            "Trying alternative firmware %s\n", pci_name(priv->pdev),
5724            priv->fw_pref, priv->fw_alt);
5725     rc = mwl8k_request_fw(priv, priv->fw_alt, &priv->fw_ucode, true);
5726     if (rc) {
5727         printk(KERN_ERR "%s: Error requesting alt fw %s\n",
5728                pci_name(priv->pdev), priv->fw_alt);
5729         return rc;
5730     }
5731     return 0;
5732 }
5733 
5734 static int mwl8k_firmware_load_success(struct mwl8k_priv *priv);
5735 static void mwl8k_fw_state_machine(const struct firmware *fw, void *context)
5736 {
5737     struct mwl8k_priv *priv = context;
5738     struct mwl8k_device_info *di = priv->device_info;
5739     int rc;
5740 
5741     switch (priv->fw_state) {
5742     case FW_STATE_INIT:
5743         if (!fw) {
5744             printk(KERN_ERR "%s: Error requesting helper fw %s\n",
5745                    pci_name(priv->pdev), di->helper_image);
5746             goto fail;
5747         }
5748         priv->fw_helper = fw;
5749         rc = mwl8k_request_fw(priv, priv->fw_pref, &priv->fw_ucode,
5750                       true);
5751         if (rc && priv->fw_alt) {
5752             rc = mwl8k_request_alt_fw(priv);
5753             if (rc)
5754                 goto fail;
5755             priv->fw_state = FW_STATE_LOADING_ALT;
5756         } else if (rc)
5757             goto fail;
5758         else
5759             priv->fw_state = FW_STATE_LOADING_PREF;
5760         break;
5761 
5762     case FW_STATE_LOADING_PREF:
5763         if (!fw) {
5764             if (priv->fw_alt) {
5765                 rc = mwl8k_request_alt_fw(priv);
5766                 if (rc)
5767                     goto fail;
5768                 priv->fw_state = FW_STATE_LOADING_ALT;
5769             } else
5770                 goto fail;
5771         } else {
5772             priv->fw_ucode = fw;
5773             rc = mwl8k_firmware_load_success(priv);
5774             if (rc)
5775                 goto fail;
5776             else
5777                 complete(&priv->firmware_loading_complete);
5778         }
5779         break;
5780 
5781     case FW_STATE_LOADING_ALT:
5782         if (!fw) {
5783             printk(KERN_ERR "%s: Error requesting alt fw %s\n",
5784                    pci_name(priv->pdev), di->helper_image);
5785             goto fail;
5786         }
5787         priv->fw_ucode = fw;
5788         rc = mwl8k_firmware_load_success(priv);
5789         if (rc)
5790             goto fail;
5791         else
5792             complete(&priv->firmware_loading_complete);
5793         break;
5794 
5795     default:
5796         printk(KERN_ERR "%s: Unexpected firmware loading state: %d\n",
5797                MWL8K_NAME, priv->fw_state);
5798         BUG_ON(1);
5799     }
5800 
5801     return;
5802 
5803 fail:
5804     priv->fw_state = FW_STATE_ERROR;
5805     complete(&priv->firmware_loading_complete);
5806     mwl8k_release_firmware(priv);
5807     device_release_driver(&priv->pdev->dev);
5808 }
5809 
5810 #define MAX_RESTART_ATTEMPTS 1
5811 static int mwl8k_init_firmware(struct ieee80211_hw *hw, char *fw_image,
5812                    bool nowait)
5813 {
5814     struct mwl8k_priv *priv = hw->priv;
5815     int rc;
5816     int count = MAX_RESTART_ATTEMPTS;
5817 
5818 retry:
5819     /* Reset firmware and hardware */
5820     mwl8k_hw_reset(priv);
5821 
5822     /* Ask userland hotplug daemon for the device firmware */
5823     rc = mwl8k_request_firmware(priv, fw_image, nowait);
5824     if (rc) {
5825         wiphy_err(hw->wiphy, "Firmware files not found\n");
5826         return rc;
5827     }
5828 
5829     if (nowait)
5830         return rc;
5831 
5832     /* Load firmware into hardware */
5833     rc = mwl8k_load_firmware(hw);
5834     if (rc)
5835         wiphy_err(hw->wiphy, "Cannot start firmware\n");
5836 
5837     /* Reclaim memory once firmware is successfully loaded */
5838     mwl8k_release_firmware(priv);
5839 
5840     if (rc && count) {
5841         /* FW did not start successfully;
5842          * lets try one more time
5843          */
5844         count--;
5845         wiphy_err(hw->wiphy, "Trying to reload the firmware again\n");
5846         msleep(20);
5847         goto retry;
5848     }
5849 
5850     return rc;
5851 }
5852 
5853 static int mwl8k_init_txqs(struct ieee80211_hw *hw)
5854 {
5855     struct mwl8k_priv *priv = hw->priv;
5856     int rc = 0;
5857     int i;
5858 
5859     for (i = 0; i < mwl8k_tx_queues(priv); i++) {
5860         rc = mwl8k_txq_init(hw, i);
5861         if (rc)
5862             break;
5863         if (priv->ap_fw)
5864             iowrite32(priv->txq[i].txd_dma,
5865                   priv->sram + priv->txq_offset[i]);
5866     }
5867     return rc;
5868 }
5869 
5870 /* initialize hw after successfully loading a firmware image */
5871 static int mwl8k_probe_hw(struct ieee80211_hw *hw)
5872 {
5873     struct mwl8k_priv *priv = hw->priv;
5874     int rc = 0;
5875     int i;
5876 
5877     if (priv->ap_fw) {
5878         priv->rxd_ops = priv->device_info->ap_rxd_ops;
5879         if (priv->rxd_ops == NULL) {
5880             wiphy_err(hw->wiphy,
5881                   "Driver does not have AP firmware image support for this hardware\n");
5882             rc = -ENOENT;
5883             goto err_stop_firmware;
5884         }
5885     } else {
5886         priv->rxd_ops = &rxd_sta_ops;
5887     }
5888 
5889     priv->sniffer_enabled = false;
5890     priv->wmm_enabled = false;
5891     priv->pending_tx_pkts = 0;
5892     atomic_set(&priv->watchdog_event_pending, 0);
5893 
5894     rc = mwl8k_rxq_init(hw, 0);
5895     if (rc)
5896         goto err_stop_firmware;
5897     rxq_refill(hw, 0, INT_MAX);
5898 
5899     /* For the sta firmware, we need to know the dma addresses of tx queues
5900      * before sending MWL8K_CMD_GET_HW_SPEC.  So we must initialize them
5901      * prior to issuing this command.  But for the AP case, we learn the
5902      * total number of queues from the result CMD_GET_HW_SPEC, so for this
5903      * case we must initialize the tx queues after.
5904      */
5905     priv->num_ampdu_queues = 0;
5906     if (!priv->ap_fw) {
5907         rc = mwl8k_init_txqs(hw);
5908         if (rc)
5909             goto err_free_queues;
5910     }
5911 
5912     iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
5913     iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5914     iowrite32(MWL8K_A2H_INT_TX_DONE|MWL8K_A2H_INT_RX_READY|
5915           MWL8K_A2H_INT_BA_WATCHDOG,
5916           priv->regs + MWL8K_HIU_A2H_INTERRUPT_CLEAR_SEL);
5917     iowrite32(MWL8K_A2H_INT_OPC_DONE,
5918           priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
5919 
5920     rc = request_irq(priv->pdev->irq, mwl8k_interrupt,
5921              IRQF_SHARED, MWL8K_NAME, hw);
5922     if (rc) {
5923         wiphy_err(hw->wiphy, "failed to register IRQ handler\n");
5924         goto err_free_queues;
5925     }
5926 
5927     /*
5928      * When hw restart is requested,
5929      * mac80211 will take care of clearing
5930      * the ampdu streams, so do not clear
5931      * the ampdu state here
5932      */
5933     if (!priv->hw_restart_in_progress)
5934         memset(priv->ampdu, 0, sizeof(priv->ampdu));
5935 
5936     /*
5937      * Temporarily enable interrupts.  Initial firmware host
5938      * commands use interrupts and avoid polling.  Disable
5939      * interrupts when done.
5940      */
5941     iowrite32(MWL8K_A2H_EVENTS, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5942 
5943     /* Get config data, mac addrs etc */
5944     if (priv->ap_fw) {
5945         rc = mwl8k_cmd_get_hw_spec_ap(hw);
5946         if (!rc)
5947             rc = mwl8k_init_txqs(hw);
5948         if (!rc)
5949             rc = mwl8k_cmd_set_hw_spec(hw);
5950     } else {
5951         rc = mwl8k_cmd_get_hw_spec_sta(hw);
5952     }
5953     if (rc) {
5954         wiphy_err(hw->wiphy, "Cannot initialise firmware\n");
5955         goto err_free_irq;
5956     }
5957 
5958     /* Turn radio off */
5959     rc = mwl8k_cmd_radio_disable(hw);
5960     if (rc) {
5961         wiphy_err(hw->wiphy, "Cannot disable\n");
5962         goto err_free_irq;
5963     }
5964 
5965     /* Clear MAC address */
5966     rc = mwl8k_cmd_set_mac_addr(hw, NULL, "\x00\x00\x00\x00\x00\x00");
5967     if (rc) {
5968         wiphy_err(hw->wiphy, "Cannot clear MAC address\n");
5969         goto err_free_irq;
5970     }
5971 
5972     /* Configure Antennas */
5973     rc = mwl8k_cmd_rf_antenna(hw, MWL8K_RF_ANTENNA_RX, 0x3);
5974     if (rc)
5975         wiphy_warn(hw->wiphy, "failed to set # of RX antennas");
5976     rc = mwl8k_cmd_rf_antenna(hw, MWL8K_RF_ANTENNA_TX, 0x7);
5977     if (rc)
5978         wiphy_warn(hw->wiphy, "failed to set # of TX antennas");
5979 
5980 
5981     /* Disable interrupts */
5982     iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5983     free_irq(priv->pdev->irq, hw);
5984 
5985     wiphy_info(hw->wiphy, "%s v%d, %pm, %s firmware %u.%u.%u.%u\n",
5986            priv->device_info->part_name,
5987            priv->hw_rev, hw->wiphy->perm_addr,
5988            priv->ap_fw ? "AP" : "STA",
5989            (priv->fw_rev >> 24) & 0xff, (priv->fw_rev >> 16) & 0xff,
5990            (priv->fw_rev >> 8) & 0xff, priv->fw_rev & 0xff);
5991 
5992     return 0;
5993 
5994 err_free_irq:
5995     iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5996     free_irq(priv->pdev->irq, hw);
5997 
5998 err_free_queues:
5999     for (i = 0; i < mwl8k_tx_queues(priv); i++)
6000         mwl8k_txq_deinit(hw, i);
6001     mwl8k_rxq_deinit(hw, 0);
6002 
6003 err_stop_firmware:
6004     mwl8k_hw_reset(priv);
6005 
6006     return rc;
6007 }
6008 
6009 /*
6010  * invoke mwl8k_reload_firmware to change the firmware image after the device
6011  * has already been registered
6012  */
6013 static int mwl8k_reload_firmware(struct ieee80211_hw *hw, char *fw_image)
6014 {
6015     int i, rc = 0;
6016     struct mwl8k_priv *priv = hw->priv;
6017     struct mwl8k_vif *vif, *tmp_vif;
6018 
6019     mwl8k_stop(hw);
6020     mwl8k_rxq_deinit(hw, 0);
6021 
6022     /*
6023      * All the existing interfaces are re-added by the ieee80211_reconfig;
6024      * which means driver should remove existing interfaces before calling
6025      * ieee80211_restart_hw
6026      */
6027     if (priv->hw_restart_in_progress)
6028         list_for_each_entry_safe(vif, tmp_vif, &priv->vif_list, list)
6029             mwl8k_remove_vif(priv, vif);
6030 
6031     for (i = 0; i < mwl8k_tx_queues(priv); i++)
6032         mwl8k_txq_deinit(hw, i);
6033 
6034     rc = mwl8k_init_firmware(hw, fw_image, false);
6035     if (rc)
6036         goto fail;
6037 
6038     rc = mwl8k_probe_hw(hw);
6039     if (rc)
6040         goto fail;
6041 
6042     if (priv->hw_restart_in_progress)
6043         return rc;
6044 
6045     rc = mwl8k_start(hw);
6046     if (rc)
6047         goto fail;
6048 
6049     rc = mwl8k_config(hw, ~0);
6050     if (rc)
6051         goto fail;
6052 
6053     for (i = 0; i < MWL8K_TX_WMM_QUEUES; i++) {
6054         rc = mwl8k_conf_tx(hw, NULL, 0, i, &priv->wmm_params[i]);
6055         if (rc)
6056             goto fail;
6057     }
6058 
6059     return rc;
6060 
6061 fail:
6062     printk(KERN_WARNING "mwl8k: Failed to reload firmware image.\n");
6063     return rc;
6064 }
6065 
6066 static const struct ieee80211_iface_limit ap_if_limits[] = {
6067     { .max = 8, .types = BIT(NL80211_IFTYPE_AP) },
6068     { .max = 1, .types = BIT(NL80211_IFTYPE_STATION) },
6069 };
6070 
6071 static const struct ieee80211_iface_combination ap_if_comb = {
6072     .limits = ap_if_limits,
6073     .n_limits = ARRAY_SIZE(ap_if_limits),
6074     .max_interfaces = 8,
6075     .num_different_channels = 1,
6076 };
6077 
6078 
6079 static int mwl8k_firmware_load_success(struct mwl8k_priv *priv)
6080 {
6081     struct ieee80211_hw *hw = priv->hw;
6082     int i, rc;
6083 
6084     rc = mwl8k_load_firmware(hw);
6085     mwl8k_release_firmware(priv);
6086     if (rc) {
6087         wiphy_err(hw->wiphy, "Cannot start firmware\n");
6088         return rc;
6089     }
6090 
6091     /*
6092      * Extra headroom is the size of the required DMA header
6093      * minus the size of the smallest 802.11 frame (CTS frame).
6094      */
6095     hw->extra_tx_headroom =
6096         sizeof(struct mwl8k_dma_data) - sizeof(struct ieee80211_cts);
6097 
6098     hw->extra_tx_headroom -= priv->ap_fw ? REDUCED_TX_HEADROOM : 0;
6099 
6100     hw->queues = MWL8K_TX_WMM_QUEUES;
6101 
6102     /* Set rssi values to dBm */
6103     ieee80211_hw_set(hw, SIGNAL_DBM);
6104     ieee80211_hw_set(hw, HAS_RATE_CONTROL);
6105 
6106     /*
6107      * Ask mac80211 to not to trigger PS mode
6108      * based on PM bit of incoming frames.
6109      */
6110     if (priv->ap_fw)
6111         ieee80211_hw_set(hw, AP_LINK_PS);
6112 
6113     hw->vif_data_size = sizeof(struct mwl8k_vif);
6114     hw->sta_data_size = sizeof(struct mwl8k_sta);
6115 
6116     priv->macids_used = 0;
6117     INIT_LIST_HEAD(&priv->vif_list);
6118 
6119     /* Set default radio state and preamble */
6120     priv->radio_on = false;
6121     priv->radio_short_preamble = false;
6122 
6123     /* Finalize join worker */
6124     INIT_WORK(&priv->finalize_join_worker, mwl8k_finalize_join_worker);
6125     /* Handle watchdog ba events */
6126     INIT_WORK(&priv->watchdog_ba_handle, mwl8k_watchdog_ba_events);
6127     /* To reload the firmware if it crashes */
6128     INIT_WORK(&priv->fw_reload, mwl8k_hw_restart_work);
6129 
6130     /* TX reclaim and RX tasklets.  */
6131     tasklet_setup(&priv->poll_tx_task, mwl8k_tx_poll);
6132     tasklet_disable(&priv->poll_tx_task);
6133     tasklet_setup(&priv->poll_rx_task, mwl8k_rx_poll);
6134     tasklet_disable(&priv->poll_rx_task);
6135 
6136     /* Power management cookie */
6137     priv->cookie = dma_alloc_coherent(&priv->pdev->dev, 4,
6138                       &priv->cookie_dma, GFP_KERNEL);
6139     if (priv->cookie == NULL)
6140         return -ENOMEM;
6141 
6142     mutex_init(&priv->fw_mutex);
6143     priv->fw_mutex_owner = NULL;
6144     priv->fw_mutex_depth = 0;
6145     priv->hostcmd_wait = NULL;
6146 
6147     spin_lock_init(&priv->tx_lock);
6148 
6149     spin_lock_init(&priv->stream_lock);
6150 
6151     priv->tx_wait = NULL;
6152 
6153     rc = mwl8k_probe_hw(hw);
6154     if (rc)
6155         goto err_free_cookie;
6156 
6157     hw->wiphy->interface_modes = 0;
6158 
6159     if (priv->ap_macids_supported || priv->device_info->fw_image_ap) {
6160         hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP);
6161         hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_STATION);
6162         hw->wiphy->iface_combinations = &ap_if_comb;
6163         hw->wiphy->n_iface_combinations = 1;
6164     }
6165 
6166     if (priv->sta_macids_supported || priv->device_info->fw_image_sta)
6167         hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_STATION);
6168 
6169     wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
6170 
6171     rc = ieee80211_register_hw(hw);
6172     if (rc) {
6173         wiphy_err(hw->wiphy, "Cannot register device\n");
6174         goto err_unprobe_hw;
6175     }
6176 
6177     return 0;
6178 
6179 err_unprobe_hw:
6180     for (i = 0; i < mwl8k_tx_queues(priv); i++)
6181         mwl8k_txq_deinit(hw, i);
6182     mwl8k_rxq_deinit(hw, 0);
6183 
6184 err_free_cookie:
6185     if (priv->cookie != NULL)
6186         dma_free_coherent(&priv->pdev->dev, 4, priv->cookie,
6187                   priv->cookie_dma);
6188 
6189     return rc;
6190 }
6191 static int mwl8k_probe(struct pci_dev *pdev,
6192                  const struct pci_device_id *id)
6193 {
6194     static int printed_version;
6195     struct ieee80211_hw *hw;
6196     struct mwl8k_priv *priv;
6197     struct mwl8k_device_info *di;
6198     int rc;
6199 
6200     if (!printed_version) {
6201         printk(KERN_INFO "%s version %s\n", MWL8K_DESC, MWL8K_VERSION);
6202         printed_version = 1;
6203     }
6204 
6205 
6206     rc = pci_enable_device(pdev);
6207     if (rc) {
6208         printk(KERN_ERR "%s: Cannot enable new PCI device\n",
6209                MWL8K_NAME);
6210         return rc;
6211     }
6212 
6213     rc = pci_request_regions(pdev, MWL8K_NAME);
6214     if (rc) {
6215         printk(KERN_ERR "%s: Cannot obtain PCI resources\n",
6216                MWL8K_NAME);
6217         goto err_disable_device;
6218     }
6219 
6220     pci_set_master(pdev);
6221 
6222 
6223     hw = ieee80211_alloc_hw(sizeof(*priv), &mwl8k_ops);
6224     if (hw == NULL) {
6225         printk(KERN_ERR "%s: ieee80211 alloc failed\n", MWL8K_NAME);
6226         rc = -ENOMEM;
6227         goto err_free_reg;
6228     }
6229 
6230     SET_IEEE80211_DEV(hw, &pdev->dev);
6231     pci_set_drvdata(pdev, hw);
6232 
6233     priv = hw->priv;
6234     priv->hw = hw;
6235     priv->pdev = pdev;
6236     priv->device_info = &mwl8k_info_tbl[id->driver_data];
6237 
6238     if (id->driver_data == MWL8764)
6239         priv->is_8764 = true;
6240 
6241     priv->sram = pci_iomap(pdev, 0, 0x10000);
6242     if (priv->sram == NULL) {
6243         wiphy_err(hw->wiphy, "Cannot map device SRAM\n");
6244         rc = -EIO;
6245         goto err_iounmap;
6246     }
6247 
6248     /*
6249      * If BAR0 is a 32 bit BAR, the register BAR will be BAR1.
6250      * If BAR0 is a 64 bit BAR, the register BAR will be BAR2.
6251      */
6252     priv->regs = pci_iomap(pdev, 1, 0x10000);
6253     if (priv->regs == NULL) {
6254         priv->regs = pci_iomap(pdev, 2, 0x10000);
6255         if (priv->regs == NULL) {
6256             wiphy_err(hw->wiphy, "Cannot map device registers\n");
6257             rc = -EIO;
6258             goto err_iounmap;
6259         }
6260     }
6261 
6262     /*
6263      * Choose the initial fw image depending on user input.  If a second
6264      * image is available, make it the alternative image that will be
6265      * loaded if the first one fails.
6266      */
6267     init_completion(&priv->firmware_loading_complete);
6268     di = priv->device_info;
6269     if (ap_mode_default && di->fw_image_ap) {
6270         priv->fw_pref = di->fw_image_ap;
6271         priv->fw_alt = di->fw_image_sta;
6272     } else if (!ap_mode_default && di->fw_image_sta) {
6273         priv->fw_pref = di->fw_image_sta;
6274         priv->fw_alt = di->fw_image_ap;
6275     } else if (ap_mode_default && !di->fw_image_ap && di->fw_image_sta) {
6276         printk(KERN_WARNING "AP fw is unavailable.  Using STA fw.");
6277         priv->fw_pref = di->fw_image_sta;
6278     } else if (!ap_mode_default && !di->fw_image_sta && di->fw_image_ap) {
6279         printk(KERN_WARNING "STA fw is unavailable.  Using AP fw.");
6280         priv->fw_pref = di->fw_image_ap;
6281     }
6282     rc = mwl8k_init_firmware(hw, priv->fw_pref, true);
6283     if (rc)
6284         goto err_stop_firmware;
6285 
6286     priv->hw_restart_in_progress = false;
6287 
6288     priv->running_bsses = 0;
6289 
6290     return rc;
6291 
6292 err_stop_firmware:
6293     mwl8k_hw_reset(priv);
6294 
6295 err_iounmap:
6296     if (priv->regs != NULL)
6297         pci_iounmap(pdev, priv->regs);
6298 
6299     if (priv->sram != NULL)
6300         pci_iounmap(pdev, priv->sram);
6301 
6302     ieee80211_free_hw(hw);
6303 
6304 err_free_reg:
6305     pci_release_regions(pdev);
6306 
6307 err_disable_device:
6308     pci_disable_device(pdev);
6309 
6310     return rc;
6311 }
6312 
6313 static void mwl8k_remove(struct pci_dev *pdev)
6314 {
6315     struct ieee80211_hw *hw = pci_get_drvdata(pdev);
6316     struct mwl8k_priv *priv;
6317     int i;
6318 
6319     if (hw == NULL)
6320         return;
6321     priv = hw->priv;
6322 
6323     wait_for_completion(&priv->firmware_loading_complete);
6324 
6325     if (priv->fw_state == FW_STATE_ERROR) {
6326         mwl8k_hw_reset(priv);
6327         goto unmap;
6328     }
6329 
6330     ieee80211_stop_queues(hw);
6331 
6332     ieee80211_unregister_hw(hw);
6333 
6334     /* Remove TX reclaim and RX tasklets.  */
6335     tasklet_kill(&priv->poll_tx_task);
6336     tasklet_kill(&priv->poll_rx_task);
6337 
6338     /* Stop hardware */
6339     mwl8k_hw_reset(priv);
6340 
6341     /* Return all skbs to mac80211 */
6342     for (i = 0; i < mwl8k_tx_queues(priv); i++)
6343         mwl8k_txq_reclaim(hw, i, INT_MAX, 1);
6344 
6345     for (i = 0; i < mwl8k_tx_queues(priv); i++)
6346         mwl8k_txq_deinit(hw, i);
6347 
6348     mwl8k_rxq_deinit(hw, 0);
6349 
6350     dma_free_coherent(&priv->pdev->dev, 4, priv->cookie, priv->cookie_dma);
6351 
6352 unmap:
6353     pci_iounmap(pdev, priv->regs);
6354     pci_iounmap(pdev, priv->sram);
6355     ieee80211_free_hw(hw);
6356     pci_release_regions(pdev);
6357     pci_disable_device(pdev);
6358 }
6359 
6360 static struct pci_driver mwl8k_driver = {
6361     .name       = MWL8K_NAME,
6362     .id_table   = mwl8k_pci_id_table,
6363     .probe      = mwl8k_probe,
6364     .remove     = mwl8k_remove,
6365 };
6366 
6367 module_pci_driver(mwl8k_driver);
6368 
6369 MODULE_DESCRIPTION(MWL8K_DESC);
6370 MODULE_VERSION(MWL8K_VERSION);
6371 MODULE_AUTHOR("Lennert Buytenhek <buytenh@marvell.com>");
6372 MODULE_LICENSE("GPL");
[ Source navigation ] [ Diff markup ] [ Identifier search ] [ general search ]

This page was automatically generated by the 2.1.0 LXR engine.

The LXR team
Valid CSS 2.1! Valid HTML 4.01!