diff options
Diffstat (limited to 'drivers/net/wireless/marvell/mwl8k.c')
| -rw-r--r-- | drivers/net/wireless/marvell/mwl8k.c | 6355 |
1 files changed, 6355 insertions, 0 deletions
diff --git a/drivers/net/wireless/marvell/mwl8k.c b/drivers/net/wireless/marvell/mwl8k.c new file mode 100644 index 0000000..8e4e9b6 --- /dev/null +++ b/drivers/net/wireless/marvell/mwl8k.c @@ -0,0 +1,6355 @@ +/* + * drivers/net/wireless/mwl8k.c + * Driver for Marvell TOPDOG 802.11 Wireless cards + * + * Copyright (C) 2008, 2009, 2010 Marvell Semiconductor Inc. + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#include <linux/interrupt.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/spinlock.h> +#include <linux/list.h> +#include <linux/pci.h> +#include <linux/delay.h> +#include <linux/completion.h> +#include <linux/etherdevice.h> +#include <linux/slab.h> +#include <net/mac80211.h> +#include <linux/moduleparam.h> +#include <linux/firmware.h> +#include <linux/workqueue.h> + +#define MWL8K_DESC "Marvell TOPDOG(R) 802.11 Wireless Network Driver" +#define MWL8K_NAME KBUILD_MODNAME +#define MWL8K_VERSION "0.13" + +/* Module parameters */ +static bool ap_mode_default; +module_param(ap_mode_default, bool, 0); +MODULE_PARM_DESC(ap_mode_default, + "Set to 1 to make ap mode the default instead of sta mode"); + +/* Register definitions */ +#define MWL8K_HIU_GEN_PTR 0x00000c10 +#define MWL8K_MODE_STA 0x0000005a +#define MWL8K_MODE_AP 0x000000a5 +#define MWL8K_HIU_INT_CODE 0x00000c14 +#define MWL8K_FWSTA_READY 0xf0f1f2f4 +#define MWL8K_FWAP_READY 0xf1f2f4a5 +#define MWL8K_INT_CODE_CMD_FINISHED 0x00000005 +#define MWL8K_HIU_SCRATCH 0x00000c40 + +/* Host->device communications */ +#define MWL8K_HIU_H2A_INTERRUPT_EVENTS 0x00000c18 +#define MWL8K_HIU_H2A_INTERRUPT_STATUS 0x00000c1c +#define MWL8K_HIU_H2A_INTERRUPT_MASK 0x00000c20 +#define MWL8K_HIU_H2A_INTERRUPT_CLEAR_SEL 0x00000c24 +#define MWL8K_HIU_H2A_INTERRUPT_STATUS_MASK 0x00000c28 +#define MWL8K_H2A_INT_DUMMY (1 << 20) +#define MWL8K_H2A_INT_RESET (1 << 15) +#define MWL8K_H2A_INT_DOORBELL (1 << 1) +#define MWL8K_H2A_INT_PPA_READY (1 << 0) + +/* Device->host communications */ +#define MWL8K_HIU_A2H_INTERRUPT_EVENTS 0x00000c2c +#define MWL8K_HIU_A2H_INTERRUPT_STATUS 0x00000c30 +#define MWL8K_HIU_A2H_INTERRUPT_MASK 0x00000c34 +#define MWL8K_HIU_A2H_INTERRUPT_CLEAR_SEL 0x00000c38 +#define MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK 0x00000c3c +#define MWL8K_A2H_INT_DUMMY (1 << 20) +#define MWL8K_A2H_INT_BA_WATCHDOG (1 << 14) +#define MWL8K_A2H_INT_CHNL_SWITCHED (1 << 11) +#define MWL8K_A2H_INT_QUEUE_EMPTY (1 << 10) +#define MWL8K_A2H_INT_RADAR_DETECT (1 << 7) +#define MWL8K_A2H_INT_RADIO_ON (1 << 6) +#define MWL8K_A2H_INT_RADIO_OFF (1 << 5) +#define MWL8K_A2H_INT_MAC_EVENT (1 << 3) +#define MWL8K_A2H_INT_OPC_DONE (1 << 2) +#define MWL8K_A2H_INT_RX_READY (1 << 1) +#define MWL8K_A2H_INT_TX_DONE (1 << 0) + +/* HW micro second timer register + * located at offset 0xA600. This + * will be used to timestamp tx + * packets. + */ + +#define MWL8K_HW_TIMER_REGISTER 0x0000a600 +#define BBU_RXRDY_CNT_REG 0x0000a860 +#define NOK_CCA_CNT_REG 0x0000a6a0 +#define BBU_AVG_NOISE_VAL 0x67 + +#define MWL8K_A2H_EVENTS (MWL8K_A2H_INT_DUMMY | \ + MWL8K_A2H_INT_CHNL_SWITCHED | \ + MWL8K_A2H_INT_QUEUE_EMPTY | \ + MWL8K_A2H_INT_RADAR_DETECT | \ + MWL8K_A2H_INT_RADIO_ON | \ + MWL8K_A2H_INT_RADIO_OFF | \ + MWL8K_A2H_INT_MAC_EVENT | \ + MWL8K_A2H_INT_OPC_DONE | \ + MWL8K_A2H_INT_RX_READY | \ + MWL8K_A2H_INT_TX_DONE | \ + MWL8K_A2H_INT_BA_WATCHDOG) + +#define MWL8K_RX_QUEUES 1 +#define MWL8K_TX_WMM_QUEUES 4 +#define MWL8K_MAX_AMPDU_QUEUES 8 +#define MWL8K_MAX_TX_QUEUES (MWL8K_TX_WMM_QUEUES + MWL8K_MAX_AMPDU_QUEUES) +#define mwl8k_tx_queues(priv) (MWL8K_TX_WMM_QUEUES + (priv)->num_ampdu_queues) + +/* txpriorities are mapped with hw queues. + * Each hw queue has a txpriority. + */ +#define TOTAL_HW_TX_QUEUES 8 + +/* Each HW queue can have one AMPDU stream. + * But, because one of the hw queue is reserved, + * maximum AMPDU queues that can be created are + * one short of total tx queues. + */ +#define MWL8K_NUM_AMPDU_STREAMS (TOTAL_HW_TX_QUEUES - 1) + +#define MWL8K_NUM_CHANS 18 + +struct rxd_ops { + int rxd_size; + void (*rxd_init)(void *rxd, dma_addr_t next_dma_addr); + void (*rxd_refill)(void *rxd, dma_addr_t addr, int len); + int (*rxd_process)(void *rxd, struct ieee80211_rx_status *status, + __le16 *qos, s8 *noise); +}; + +struct mwl8k_device_info { + char *part_name; + char *helper_image; + char *fw_image_sta; + char *fw_image_ap; + struct rxd_ops *ap_rxd_ops; + u32 fw_api_ap; +}; + +struct mwl8k_rx_queue { + int rxd_count; + + /* hw receives here */ + int head; + + /* refill descs here */ + int tail; + + void *rxd; + dma_addr_t rxd_dma; + struct { + struct sk_buff *skb; + DEFINE_DMA_UNMAP_ADDR(dma); + } *buf; +}; + +struct mwl8k_tx_queue { + /* hw transmits here */ + int head; + + /* sw appends here */ + int tail; + + unsigned int len; + struct mwl8k_tx_desc *txd; + dma_addr_t txd_dma; + struct sk_buff **skb; +}; + +enum { + AMPDU_NO_STREAM, + AMPDU_STREAM_NEW, + AMPDU_STREAM_IN_PROGRESS, + AMPDU_STREAM_ACTIVE, +}; + +struct mwl8k_ampdu_stream { + struct ieee80211_sta *sta; + u8 tid; + u8 state; + u8 idx; +}; + +struct mwl8k_priv { + struct ieee80211_hw *hw; + struct pci_dev *pdev; + int irq; + + struct mwl8k_device_info *device_info; + + void __iomem *sram; + void __iomem *regs; + + /* firmware */ + const struct firmware *fw_helper; + const struct firmware *fw_ucode; + + /* hardware/firmware parameters */ + bool ap_fw; + struct rxd_ops *rxd_ops; + struct ieee80211_supported_band band_24; + struct ieee80211_channel channels_24[14]; + struct ieee80211_rate rates_24[13]; + struct ieee80211_supported_band band_50; + struct ieee80211_channel channels_50[9]; + struct ieee80211_rate rates_50[8]; + u32 ap_macids_supported; + u32 sta_macids_supported; + + /* Ampdu stream information */ + u8 num_ampdu_queues; + spinlock_t stream_lock; + struct mwl8k_ampdu_stream ampdu[MWL8K_MAX_AMPDU_QUEUES]; + struct work_struct watchdog_ba_handle; + + /* firmware access */ + struct mutex fw_mutex; + struct task_struct *fw_mutex_owner; + struct task_struct *hw_restart_owner; + int fw_mutex_depth; + struct completion *hostcmd_wait; + + atomic_t watchdog_event_pending; + + /* lock held over TX and TX reap */ + spinlock_t tx_lock; + + /* TX quiesce completion, protected by fw_mutex and tx_lock */ + struct completion *tx_wait; + + /* List of interfaces. */ + u32 macids_used; + struct list_head vif_list; + + /* power management status cookie from firmware */ + u32 *cookie; + dma_addr_t cookie_dma; + + u16 num_mcaddrs; + u8 hw_rev; + u32 fw_rev; + u32 caps; + + /* + * Running count of TX packets in flight, to avoid + * iterating over the transmit rings each time. + */ + int pending_tx_pkts; + + struct mwl8k_rx_queue rxq[MWL8K_RX_QUEUES]; + struct mwl8k_tx_queue txq[MWL8K_MAX_TX_QUEUES]; + u32 txq_offset[MWL8K_MAX_TX_QUEUES]; + + bool radio_on; + bool radio_short_preamble; + bool sniffer_enabled; + bool wmm_enabled; + + /* XXX need to convert this to handle multiple interfaces */ + bool capture_beacon; + u8 capture_bssid[ETH_ALEN]; + struct sk_buff *beacon_skb; + + /* + * This FJ worker has to be global as it is scheduled from the + * RX handler. At this point we don't know which interface it + * belongs to until the list of bssids waiting to complete join + * is checked. + */ + struct work_struct finalize_join_worker; + + /* Tasklet to perform TX reclaim. */ + struct tasklet_struct poll_tx_task; + + /* Tasklet to perform RX. */ + struct tasklet_struct poll_rx_task; + + /* Most recently reported noise in dBm */ + s8 noise; + + /* + * preserve the queue configurations so they can be restored if/when + * the firmware image is swapped. + */ + struct ieee80211_tx_queue_params wmm_params[MWL8K_TX_WMM_QUEUES]; + + /* To perform the task of reloading the firmware */ + struct work_struct fw_reload; + bool hw_restart_in_progress; + + /* async firmware loading state */ + unsigned fw_state; + char *fw_pref; + char *fw_alt; + bool is_8764; + struct completion firmware_loading_complete; + + /* bitmap of running BSSes */ + u32 running_bsses; + + /* ACS related */ + bool sw_scan_start; + struct ieee80211_channel *acs_chan; + unsigned long channel_time; + struct survey_info survey[MWL8K_NUM_CHANS]; +}; + +#define MAX_WEP_KEY_LEN 13 +#define NUM_WEP_KEYS 4 + +/* Per interface specific private data */ +struct mwl8k_vif { + struct list_head list; + struct ieee80211_vif *vif; + + /* Firmware macid for this vif. */ + int macid; + + /* Non AMPDU sequence number assigned by driver. */ + u16 seqno; + + /* Saved WEP keys */ + struct { + u8 enabled; + u8 key[sizeof(struct ieee80211_key_conf) + MAX_WEP_KEY_LEN]; + } wep_key_conf[NUM_WEP_KEYS]; + + /* BSSID */ + u8 bssid[ETH_ALEN]; + + /* A flag to indicate is HW crypto is enabled for this bssid */ + bool is_hw_crypto_enabled; +}; +#define MWL8K_VIF(_vif) ((struct mwl8k_vif *)&((_vif)->drv_priv)) +#define IEEE80211_KEY_CONF(_u8) ((struct ieee80211_key_conf *)(_u8)) + +struct tx_traffic_info { + u32 start_time; + u32 pkts; +}; + +#define MWL8K_MAX_TID 8 +struct mwl8k_sta { + /* Index into station database. Returned by UPDATE_STADB. */ + u8 peer_id; + u8 is_ampdu_allowed; + struct tx_traffic_info tx_stats[MWL8K_MAX_TID]; +}; +#define MWL8K_STA(_sta) ((struct mwl8k_sta *)&((_sta)->drv_priv)) + +static const struct ieee80211_channel mwl8k_channels_24[] = { + { .band = NL80211_BAND_2GHZ, .center_freq = 2412, .hw_value = 1, }, + { .band = NL80211_BAND_2GHZ, .center_freq = 2417, .hw_value = 2, }, + { .band = NL80211_BAND_2GHZ, .center_freq = 2422, .hw_value = 3, }, + { .band = NL80211_BAND_2GHZ, .center_freq = 2427, .hw_value = 4, }, + { .band = NL80211_BAND_2GHZ, .center_freq = 2432, .hw_value = 5, }, + { .band = NL80211_BAND_2GHZ, .center_freq = 2437, .hw_value = 6, }, + { .band = NL80211_BAND_2GHZ, .center_freq = 2442, .hw_value = 7, }, + { .band = NL80211_BAND_2GHZ, .center_freq = 2447, .hw_value = 8, }, + { .band = NL80211_BAND_2GHZ, .center_freq = 2452, .hw_value = 9, }, + { .band = NL80211_BAND_2GHZ, .center_freq = 2457, .hw_value = 10, }, + { .band = NL80211_BAND_2GHZ, .center_freq = 2462, .hw_value = 11, }, + { .band = NL80211_BAND_2GHZ, .center_freq = 2467, .hw_value = 12, }, + { .band = NL80211_BAND_2GHZ, .center_freq = 2472, .hw_value = 13, }, + { .band = NL80211_BAND_2GHZ, .center_freq = 2484, .hw_value = 14, }, +}; + +static const struct ieee80211_rate mwl8k_rates_24[] = { + { .bitrate = 10, .hw_value = 2, }, + { .bitrate = 20, .hw_value = 4, }, + { .bitrate = 55, .hw_value = 11, }, + { .bitrate = 110, .hw_value = 22, }, + { .bitrate = 220, .hw_value = 44, }, + { .bitrate = 60, .hw_value = 12, }, + { .bitrate = 90, .hw_value = 18, }, + { .bitrate = 120, .hw_value = 24, }, + { .bitrate = 180, .hw_value = 36, }, + { .bitrate = 240, .hw_value = 48, }, + { .bitrate = 360, .hw_value = 72, }, + { .bitrate = 480, .hw_value = 96, }, + { .bitrate = 540, .hw_value = 108, }, +}; + +static const struct ieee80211_channel mwl8k_channels_50[] = { + { .band = NL80211_BAND_5GHZ, .center_freq = 5180, .hw_value = 36, }, + { .band = NL80211_BAND_5GHZ, .center_freq = 5200, .hw_value = 40, }, + { .band = NL80211_BAND_5GHZ, .center_freq = 5220, .hw_value = 44, }, + { .band = NL80211_BAND_5GHZ, .center_freq = 5240, .hw_value = 48, }, + { .band = NL80211_BAND_5GHZ, .center_freq = 5745, .hw_value = 149, }, + { .band = NL80211_BAND_5GHZ, .center_freq = 5765, .hw_value = 153, }, + { .band = NL80211_BAND_5GHZ, .center_freq = 5785, .hw_value = 157, }, + { .band = NL80211_BAND_5GHZ, .center_freq = 5805, .hw_value = 161, }, + { .band = NL80211_BAND_5GHZ, .center_freq = 5825, .hw_value = 165, }, +}; + +static const struct ieee80211_rate mwl8k_rates_50[] = { + { .bitrate = 60, .hw_value = 12, }, + { .bitrate = 90, .hw_value = 18, }, + { .bitrate = 120, .hw_value = 24, }, + { .bitrate = 180, .hw_value = 36, }, + { .bitrate = 240, .hw_value = 48, }, + { .bitrate = 360, .hw_value = 72, }, + { .bitrate = 480, .hw_value = 96, }, + { .bitrate = 540, .hw_value = 108, }, +}; + +/* Set or get info from Firmware */ +#define MWL8K_CMD_GET 0x0000 +#define MWL8K_CMD_SET 0x0001 +#define MWL8K_CMD_SET_LIST 0x0002 + +/* Firmware command codes */ +#define MWL8K_CMD_CODE_DNLD 0x0001 +#define MWL8K_CMD_GET_HW_SPEC 0x0003 +#define MWL8K_CMD_SET_HW_SPEC 0x0004 +#define MWL8K_CMD_MAC_MULTICAST_ADR 0x0010 +#define MWL8K_CMD_GET_STAT 0x0014 +#define MWL8K_CMD_BBP_REG_ACCESS 0x001a +#define MWL8K_CMD_RADIO_CONTROL 0x001c +#define MWL8K_CMD_RF_TX_POWER 0x001e +#define MWL8K_CMD_TX_POWER 0x001f +#define MWL8K_CMD_RF_ANTENNA 0x0020 +#define MWL8K_CMD_SET_BEACON 0x0100 /* per-vif */ +#define MWL8K_CMD_SET_PRE_SCAN 0x0107 +#define MWL8K_CMD_SET_POST_SCAN 0x0108 +#define MWL8K_CMD_SET_RF_CHANNEL 0x010a +#define MWL8K_CMD_SET_AID 0x010d +#define MWL8K_CMD_SET_RATE 0x0110 +#define MWL8K_CMD_SET_FINALIZE_JOIN 0x0111 +#define MWL8K_CMD_RTS_THRESHOLD 0x0113 +#define MWL8K_CMD_SET_SLOT 0x0114 +#define MWL8K_CMD_SET_EDCA_PARAMS 0x0115 +#define MWL8K_CMD_SET_WMM_MODE 0x0123 +#define MWL8K_CMD_MIMO_CONFIG 0x0125 +#define MWL8K_CMD_USE_FIXED_RATE 0x0126 +#define MWL8K_CMD_ENABLE_SNIFFER 0x0150 +#define MWL8K_CMD_SET_MAC_ADDR 0x0202 /* per-vif */ +#define MWL8K_CMD_SET_RATEADAPT_MODE 0x0203 +#define MWL8K_CMD_GET_WATCHDOG_BITMAP 0x0205 +#define MWL8K_CMD_DEL_MAC_ADDR 0x0206 /* per-vif */ +#define MWL8K_CMD_BSS_START 0x1100 /* per-vif */ +#define MWL8K_CMD_SET_NEW_STN 0x1111 /* per-vif */ +#define MWL8K_CMD_UPDATE_ENCRYPTION 0x1122 /* per-vif */ +#define MWL8K_CMD_UPDATE_STADB 0x1123 +#define MWL8K_CMD_BASTREAM 0x1125 + +static const char *mwl8k_cmd_name(__le16 cmd, char *buf, int bufsize) +{ + u16 command = le16_to_cpu(cmd); + +#define MWL8K_CMDNAME(x) case MWL8K_CMD_##x: do {\ + snprintf(buf, bufsize, "%s", #x);\ + return buf;\ + } while (0) + switch (command & ~0x8000) { + MWL8K_CMDNAME(CODE_DNLD); + MWL8K_CMDNAME(GET_HW_SPEC); + MWL8K_CMDNAME(SET_HW_SPEC); + MWL8K_CMDNAME(MAC_MULTICAST_ADR); + MWL8K_CMDNAME(GET_STAT); + MWL8K_CMDNAME(RADIO_CONTROL); + MWL8K_CMDNAME(RF_TX_POWER); + MWL8K_CMDNAME(TX_POWER); + MWL8K_CMDNAME(RF_ANTENNA); + MWL8K_CMDNAME(SET_BEACON); + MWL8K_CMDNAME(SET_PRE_SCAN); + MWL8K_CMDNAME(SET_POST_SCAN); + MWL8K_CMDNAME(SET_RF_CHANNEL); + MWL8K_CMDNAME(SET_AID); + MWL8K_CMDNAME(SET_RATE); + MWL8K_CMDNAME(SET_FINALIZE_JOIN); + MWL8K_CMDNAME(RTS_THRESHOLD); + MWL8K_CMDNAME(SET_SLOT); + MWL8K_CMDNAME(SET_EDCA_PARAMS); + MWL8K_CMDNAME(SET_WMM_MODE); + MWL8K_CMDNAME(MIMO_CONFIG); + MWL8K_CMDNAME(USE_FIXED_RATE); + MWL8K_CMDNAME(ENABLE_SNIFFER); + MWL8K_CMDNAME(SET_MAC_ADDR); + MWL8K_CMDNAME(SET_RATEADAPT_MODE); + MWL8K_CMDNAME(BSS_START); + MWL8K_CMDNAME(SET_NEW_STN); + MWL8K_CMDNAME(UPDATE_ENCRYPTION); + MWL8K_CMDNAME(UPDATE_STADB); + MWL8K_CMDNAME(BASTREAM); + MWL8K_CMDNAME(GET_WATCHDOG_BITMAP); + default: + snprintf(buf, bufsize, "0x%x", cmd); + } +#undef MWL8K_CMDNAME + + return buf; +} + +/* Hardware and firmware reset */ +static void mwl8k_hw_reset(struct mwl8k_priv *priv) +{ + iowrite32(MWL8K_H2A_INT_RESET, + priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS); + iowrite32(MWL8K_H2A_INT_RESET, + priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS); + msleep(20); +} + +/* Release fw image */ +static void mwl8k_release_fw(const struct firmware **fw) +{ + if (*fw == NULL) + return; + release_firmware(*fw); + *fw = NULL; +} + +static void mwl8k_release_firmware(struct mwl8k_priv *priv) +{ + mwl8k_release_fw(&priv->fw_ucode); + mwl8k_release_fw(&priv->fw_helper); +} + +/* states for asynchronous f/w loading */ +static void mwl8k_fw_state_machine(const struct firmware *fw, void *context); +enum { + FW_STATE_INIT = 0, + FW_STATE_LOADING_PREF, + FW_STATE_LOADING_ALT, + FW_STATE_ERROR, +}; + +/* Request fw image */ +static int mwl8k_request_fw(struct mwl8k_priv *priv, + const char *fname, const struct firmware **fw, + bool nowait) +{ + /* release current image */ + if (*fw != NULL) + mwl8k_release_fw(fw); + + if (nowait) + return request_firmware_nowait(THIS_MODULE, 1, fname, + &priv->pdev->dev, GFP_KERNEL, + priv, mwl8k_fw_state_machine); + else + return request_firmware(fw, fname, &priv->pdev->dev); +} + +static int mwl8k_request_firmware(struct mwl8k_priv *priv, char *fw_image, + bool nowait) +{ + struct mwl8k_device_info *di = priv->device_info; + int rc; + + if (di->helper_image != NULL) { + if (nowait) + rc = mwl8k_request_fw(priv, di->helper_image, + &priv->fw_helper, true); + else + rc = mwl8k_request_fw(priv, di->helper_image, + &priv->fw_helper, false); + if (rc) + printk(KERN_ERR "%s: Error requesting helper fw %s\n", + pci_name(priv->pdev), di->helper_image); + + if (rc || nowait) + return rc; + } + + if (nowait) { + /* + * if we get here, no helper image is needed. Skip the + * FW_STATE_INIT state. + */ + priv->fw_state = FW_STATE_LOADING_PREF; + rc = mwl8k_request_fw(priv, fw_image, + &priv->fw_ucode, + true); + } else + rc = mwl8k_request_fw(priv, fw_image, + &priv->fw_ucode, false); + if (rc) { + printk(KERN_ERR "%s: Error requesting firmware file %s\n", + pci_name(priv->pdev), fw_image); + mwl8k_release_fw(&priv->fw_helper); + return rc; + } + + return 0; +} + +struct mwl8k_cmd_pkt { + __le16 code; + __le16 length; + __u8 seq_num; + __u8 macid; + __le16 result; + char payload[0]; +} __packed; + +/* + * Firmware loading. + */ +static int +mwl8k_send_fw_load_cmd(struct mwl8k_priv *priv, void *data, int length) +{ + void __iomem *regs = priv->regs; + dma_addr_t dma_addr; + int loops; + + dma_addr = pci_map_single(priv->pdev, data, length, PCI_DMA_TODEVICE); + if (pci_dma_mapping_error(priv->pdev, dma_addr)) + return -ENOMEM; + + iowrite32(dma_addr, regs + MWL8K_HIU_GEN_PTR); + iowrite32(0, regs + MWL8K_HIU_INT_CODE); + iowrite32(MWL8K_H2A_INT_DOORBELL, + regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS); + iowrite32(MWL8K_H2A_INT_DUMMY, + regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS); + + loops = 1000; + do { + u32 int_code; + if (priv->is_8764) { + int_code = ioread32(regs + + MWL8K_HIU_H2A_INTERRUPT_STATUS); + if (int_code == 0) + break; + } else { + int_code = ioread32(regs + MWL8K_HIU_INT_CODE); + if (int_code == MWL8K_INT_CODE_CMD_FINISHED) { + iowrite32(0, regs + MWL8K_HIU_INT_CODE); + break; + } + } + cond_resched(); + udelay(1); + } while (--loops); + + pci_unmap_single(priv->pdev, dma_addr, length, PCI_DMA_TODEVICE); + + return loops ? 0 : -ETIMEDOUT; +} + +static int mwl8k_load_fw_image(struct mwl8k_priv *priv, + const u8 *data, size_t length) +{ + struct mwl8k_cmd_pkt *cmd; + int done; + int rc = 0; + + cmd = kmalloc(sizeof(*cmd) + 256, GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->code = cpu_to_le16(MWL8K_CMD_CODE_DNLD); + cmd->seq_num = 0; + cmd->macid = 0; + cmd->result = 0; + + done = 0; + while (length) { + int block_size = length > 256 ? 256 : length; + + memcpy(cmd->payload, data + done, block_size); + cmd->length = cpu_to_le16(block_size); + + rc = mwl8k_send_fw_load_cmd(priv, cmd, + sizeof(*cmd) + block_size); + if (rc) + break; + + done += block_size; + length -= block_size; + } + + if (!rc) { + cmd->length = 0; + rc = mwl8k_send_fw_load_cmd(priv, cmd, sizeof(*cmd)); + } + + kfree(cmd); + + return rc; +} + +static int mwl8k_feed_fw_image(struct mwl8k_priv *priv, + const u8 *data, size_t length) +{ + unsigned char *buffer; + int may_continue, rc = 0; + u32 done, prev_block_size; + + buffer = kmalloc(1024, GFP_KERNEL); + if (buffer == NULL) + return -ENOMEM; + + done = 0; + prev_block_size = 0; + may_continue = 1000; + while (may_continue > 0) { + u32 block_size; + + block_size = ioread32(priv->regs + MWL8K_HIU_SCRATCH); + if (block_size & 1) { + block_size &= ~1; + may_continue--; + } else { + done += prev_block_size; + length -= prev_block_size; + } + + if (block_size > 1024 || block_size > length) { + rc = -EOVERFLOW; + break; + } + + if (length == 0) { + rc = 0; + break; + } + + if (block_size == 0) { + rc = -EPROTO; + may_continue--; + udelay(1); + continue; + } + + prev_block_size = block_size; + memcpy(buffer, data + done, block_size); + + rc = mwl8k_send_fw_load_cmd(priv, buffer, block_size); + if (rc) + break; + } + + if (!rc && length != 0) + rc = -EREMOTEIO; + + kfree(buffer); + + return rc; +} + +static int mwl8k_load_firmware(struct ieee80211_hw *hw) +{ + struct mwl8k_priv *priv = hw->priv; + const struct firmware *fw = priv->fw_ucode; + int rc; + int loops; + + if (!memcmp(fw->data, "\x01\x00\x00\x00", 4) && !priv->is_8764) { + const struct firmware *helper = priv->fw_helper; + + if (helper == NULL) { + printk(KERN_ERR "%s: helper image needed but none " + "given\n", pci_name(priv->pdev)); + return -EINVAL; + } + + rc = mwl8k_load_fw_image(priv, helper->data, helper->size); + if (rc) { + printk(KERN_ERR "%s: unable to load firmware " + "helper image\n", pci_name(priv->pdev)); + return rc; + } + msleep(20); + + rc = mwl8k_feed_fw_image(priv, fw->data, fw->size); + } else { + if (priv->is_8764) + rc = mwl8k_feed_fw_image(priv, fw->data, fw->size); + else + rc = mwl8k_load_fw_image(priv, fw->data, fw->size); + } + + if (rc) { + printk(KERN_ERR "%s: unable to load firmware image\n", + pci_name(priv->pdev)); + return rc; + } + + iowrite32(MWL8K_MODE_STA, priv->regs + MWL8K_HIU_GEN_PTR); + + loops = 500000; + do { + u32 ready_code; + + ready_code = ioread32(priv->regs + MWL8K_HIU_INT_CODE); + if (ready_code == MWL8K_FWAP_READY) { + priv->ap_fw = true; + break; + } else if (ready_code == MWL8K_FWSTA_READY) { + priv->ap_fw = false; + break; + } + + cond_resched(); + udelay(1); + } while (--loops); + + return loops ? 0 : -ETIMEDOUT; +} + + +/* DMA header used by firmware and hardware. */ +struct mwl8k_dma_data { + __le16 fwlen; + struct ieee80211_hdr wh; + char data[0]; +} __packed; + +/* Routines to add/remove DMA header from skb. */ +static inline void mwl8k_remove_dma_header(struct sk_buff *skb, __le16 qos) +{ + struct mwl8k_dma_data *tr; + int hdrlen; + + tr = (struct mwl8k_dma_data *)skb->data; + hdrlen = ieee80211_hdrlen(tr->wh.frame_control); + + if (hdrlen != sizeof(tr->wh)) { + if (ieee80211_is_data_qos(tr->wh.frame_control)) { + memmove(tr->data - hdrlen, &tr->wh, hdrlen - 2); + *((__le16 *)(tr->data - 2)) = qos; + } else { + memmove(tr->data - hdrlen, &tr->wh, hdrlen); + } + } + + if (hdrlen != sizeof(*tr)) + skb_pull(skb, sizeof(*tr) - hdrlen); +} + +#define REDUCED_TX_HEADROOM 8 + +static void +mwl8k_add_dma_header(struct mwl8k_priv *priv, struct sk_buff *skb, + int head_pad, int tail_pad) +{ + struct ieee80211_hdr *wh; + int hdrlen; + int reqd_hdrlen; + struct mwl8k_dma_data *tr; + + /* + * Add a firmware DMA header; the firmware requires that we + * present a 2-byte payload length followed by a 4-address + * header (without QoS field), followed (optionally) by any + * WEP/ExtIV header (but only filled in for CCMP). + */ + wh = (struct ieee80211_hdr *)skb->data; + + hdrlen = ieee80211_hdrlen(wh->frame_control); + + /* + * Check if skb_resize is required because of + * tx_headroom adjustment. + */ + if (priv->ap_fw && (hdrlen < (sizeof(struct ieee80211_cts) + + REDUCED_TX_HEADROOM))) { + if (pskb_expand_head(skb, REDUCED_TX_HEADROOM, 0, GFP_ATOMIC)) { + + wiphy_err(priv->hw->wiphy, + "Failed to reallocate TX buffer\n"); + return; + } + skb->truesize += REDUCED_TX_HEADROOM; + } + + reqd_hdrlen = sizeof(*tr) + head_pad; + + if (hdrlen != reqd_hdrlen) + skb_push(skb, reqd_hdrlen - hdrlen); + + if (ieee80211_is_data_qos(wh->frame_control)) + hdrlen -= IEEE80211_QOS_CTL_LEN; + + tr = (struct mwl8k_dma_data *)skb->data; + if (wh != &tr->wh) + memmove(&tr->wh, wh, hdrlen); + if (hdrlen != sizeof(tr->wh)) + memset(((void *)&tr->wh) + hdrlen, 0, sizeof(tr->wh) - hdrlen); + + /* + * Firmware length is the length of the fully formed "802.11 + * payload". That is, everything except for the 802.11 header. + * This includes all crypto material including the MIC. + */ + tr->fwlen = cpu_to_le16(skb->len - sizeof(*tr) + tail_pad); +} + +static void mwl8k_encapsulate_tx_frame(struct mwl8k_priv *priv, + struct sk_buff *skb) +{ + struct ieee80211_hdr *wh; + struct ieee80211_tx_info *tx_info; + struct ieee80211_key_conf *key_conf; + int data_pad; + int head_pad = 0; + + wh = (struct ieee80211_hdr *)skb->data; + + tx_info = IEEE80211_SKB_CB(skb); + + key_conf = NULL; + if (ieee80211_is_data(wh->frame_control)) + key_conf = tx_info->control.hw_key; + + /* + * Make sure the packet header is in the DMA header format (4-address + * without QoS), and add head & tail padding when HW crypto is enabled. + * + * We have the following trailer padding requirements: + * - WEP: 4 trailer bytes (ICV) + * - TKIP: 12 trailer bytes (8 MIC + 4 ICV) + * - CCMP: 8 trailer bytes (MIC) + */ + data_pad = 0; + if (key_conf != NULL) { + head_pad = key_conf->iv_len; + switch (key_conf->cipher) { + case WLAN_CIPHER_SUITE_WEP40: + case WLAN_CIPHER_SUITE_WEP104: + data_pad = 4; + break; + case WLAN_CIPHER_SUITE_TKIP: + data_pad = 12; + break; + case WLAN_CIPHER_SUITE_CCMP: + data_pad = 8; + break; + } + } + mwl8k_add_dma_header(priv, skb, head_pad, data_pad); +} + +/* + * Packet reception for 88w8366/88w8764 AP firmware. + */ +struct mwl8k_rxd_ap { + __le16 pkt_len; + __u8 sq2; + __u8 rate; + __le32 pkt_phys_addr; + __le32 next_rxd_phys_addr; + __le16 qos_control; + __le16 htsig2; + __le32 hw_rssi_info; + __le32 hw_noise_floor_info; + __u8 noise_floor; + __u8 pad0[3]; + __u8 rssi; + __u8 rx_status; + __u8 channel; + __u8 rx_ctrl; +} __packed; + +#define MWL8K_AP_RATE_INFO_MCS_FORMAT 0x80 +#define MWL8K_AP_RATE_INFO_40MHZ 0x40 +#define MWL8K_AP_RATE_INFO_RATEID(x) ((x) & 0x3f) + +#define MWL8K_AP_RX_CTRL_OWNED_BY_HOST 0x80 + +/* 8366/8764 AP rx_status bits */ +#define MWL8K_AP_RXSTAT_DECRYPT_ERR_MASK 0x80 +#define MWL8K_AP_RXSTAT_GENERAL_DECRYPT_ERR 0xFF +#define MWL8K_AP_RXSTAT_TKIP_DECRYPT_MIC_ERR 0x02 +#define MWL8K_AP_RXSTAT_WEP_DECRYPT_ICV_ERR 0x04 +#define MWL8K_AP_RXSTAT_TKIP_DECRYPT_ICV_ERR 0x08 + +static void mwl8k_rxd_ap_init(void *_rxd, dma_addr_t next_dma_addr) +{ + struct mwl8k_rxd_ap *rxd = _rxd; + + rxd->next_rxd_phys_addr = cpu_to_le32(next_dma_addr); + rxd->rx_ctrl = MWL8K_AP_RX_CTRL_OWNED_BY_HOST; +} + +static void mwl8k_rxd_ap_refill(void *_rxd, dma_addr_t addr, int len) +{ + struct mwl8k_rxd_ap *rxd = _rxd; + + rxd->pkt_len = cpu_to_le16(len); + rxd->pkt_phys_addr = cpu_to_le32(addr); + wmb(); + rxd->rx_ctrl = 0; +} + +static int +mwl8k_rxd_ap_process(void *_rxd, struct ieee80211_rx_status *status, + __le16 *qos, s8 *noise) +{ + struct mwl8k_rxd_ap *rxd = _rxd; + + if (!(rxd->rx_ctrl & MWL8K_AP_RX_CTRL_OWNED_BY_HOST)) + return -1; + rmb(); + + memset(status, 0, sizeof(*status)); + + status->signal = -rxd->rssi; + *noise = -rxd->noise_floor; + + if (rxd->rate & MWL8K_AP_RATE_INFO_MCS_FORMAT) { + status->encoding = RX_ENC_HT; + if (rxd->rate & MWL8K_AP_RATE_INFO_40MHZ) + status->bw = RATE_INFO_BW_40; + status->rate_idx = MWL8K_AP_RATE_INFO_RATEID(rxd->rate); + } else { + int i; + + for (i = 0; i < ARRAY_SIZE(mwl8k_rates_24); i++) { + if (mwl8k_rates_24[i].hw_value == rxd->rate) { + status->rate_idx = i; + break; + } + } + } + + if (rxd->channel > 14) { + status->band = NL80211_BAND_5GHZ; + if (!(status->encoding == RX_ENC_HT)) + status->rate_idx -= 5; + } else { + status->band = NL80211_BAND_2GHZ; + } + status->freq = ieee80211_channel_to_frequency(rxd->channel, + status->band); + + *qos = rxd->qos_control; + + if ((rxd->rx_status != MWL8K_AP_RXSTAT_GENERAL_DECRYPT_ERR) && + (rxd->rx_status & MWL8K_AP_RXSTAT_DECRYPT_ERR_MASK) && + (rxd->rx_status & MWL8K_AP_RXSTAT_TKIP_DECRYPT_MIC_ERR)) + status->flag |= RX_FLAG_MMIC_ERROR; + + return le16_to_cpu(rxd->pkt_len); +} + +static struct rxd_ops rxd_ap_ops = { + .rxd_size = sizeof(struct mwl8k_rxd_ap), + .rxd_init = mwl8k_rxd_ap_init, + .rxd_refill = mwl8k_rxd_ap_refill, + .rxd_process = mwl8k_rxd_ap_process, +}; + +/* + * Packet reception for STA firmware. + */ +struct mwl8k_rxd_sta { + __le16 pkt_len; + __u8 link_quality; + __u8 noise_level; + __le32 pkt_phys_addr; + __le32 next_rxd_phys_addr; + __le16 qos_control; + __le16 rate_info; + __le32 pad0[4]; + __u8 rssi; + __u8 channel; + __le16 pad1; + __u8 rx_ctrl; + __u8 rx_status; + __u8 pad2[2]; +} __packed; + +#define MWL8K_STA_RATE_INFO_SHORTPRE 0x8000 +#define MWL8K_STA_RATE_INFO_ANTSELECT(x) (((x) >> 11) & 0x3) +#define MWL8K_STA_RATE_INFO_RATEID(x) (((x) >> 3) & 0x3f) +#define MWL8K_STA_RATE_INFO_40MHZ 0x0004 +#define MWL8K_STA_RATE_INFO_SHORTGI 0x0002 +#define MWL8K_STA_RATE_INFO_MCS_FORMAT 0x0001 + +#define MWL8K_STA_RX_CTRL_OWNED_BY_HOST 0x02 +#define MWL8K_STA_RX_CTRL_DECRYPT_ERROR 0x04 +/* ICV=0 or MIC=1 */ +#define MWL8K_STA_RX_CTRL_DEC_ERR_TYPE 0x08 +/* Key is uploaded only in failure case */ +#define MWL8K_STA_RX_CTRL_KEY_INDEX 0x30 + +static void mwl8k_rxd_sta_init(void *_rxd, dma_addr_t next_dma_addr) +{ + struct mwl8k_rxd_sta *rxd = _rxd; + + rxd->next_rxd_phys_addr = cpu_to_le32(next_dma_addr); + rxd->rx_ctrl = MWL8K_STA_RX_CTRL_OWNED_BY_HOST; +} + +static void mwl8k_rxd_sta_refill(void *_rxd, dma_addr_t addr, int len) +{ + struct mwl8k_rxd_sta *rxd = _rxd; + + rxd->pkt_len = cpu_to_le16(len); + rxd->pkt_phys_addr = cpu_to_le32(addr); + wmb(); + rxd->rx_ctrl = 0; +} + +static int +mwl8k_rxd_sta_process(void *_rxd, struct ieee80211_rx_status *status, + __le16 *qos, s8 *noise) +{ + struct mwl8k_rxd_sta *rxd = _rxd; + u16 rate_info; + + if (!(rxd->rx_ctrl & MWL8K_STA_RX_CTRL_OWNED_BY_HOST)) + return -1; + rmb(); + + rate_info = le16_to_cpu(rxd->rate_info); + + memset(status, 0, sizeof(*status)); + + status->signal = -rxd->rssi; + *noise = -rxd->noise_level; + status->antenna = MWL8K_STA_RATE_INFO_ANTSELECT(rate_info); + status->rate_idx = MWL8K_STA_RATE_INFO_RATEID(rate_info); + + if (rate_info & MWL8K_STA_RATE_INFO_SHORTPRE) + status->enc_flags |= RX_ENC_FLAG_SHORTPRE; + if (rate_info & MWL8K_STA_RATE_INFO_40MHZ) + status->bw = RATE_INFO_BW_40; + if (rate_info & MWL8K_STA_RATE_INFO_SHORTGI) + status->enc_flags |= RX_ENC_FLAG_SHORT_GI; + if (rate_info & MWL8K_STA_RATE_INFO_MCS_FORMAT) + status->encoding = RX_ENC_HT; + + if (rxd->channel > 14) { + status->band = NL80211_BAND_5GHZ; + if (!(status->encoding == RX_ENC_HT)) + status->rate_idx -= 5; + } else { + status->band = NL80211_BAND_2GHZ; + } + status->freq = ieee80211_channel_to_frequency(rxd->channel, + status->band); + + *qos = rxd->qos_control; + if ((rxd->rx_ctrl & MWL8K_STA_RX_CTRL_DECRYPT_ERROR) && + (rxd->rx_ctrl & MWL8K_STA_RX_CTRL_DEC_ERR_TYPE)) + status->flag |= RX_FLAG_MMIC_ERROR; + + return le16_to_cpu(rxd->pkt_len); +} + +static struct rxd_ops rxd_sta_ops = { + .rxd_size = sizeof(struct mwl8k_rxd_sta), + .rxd_init = mwl8k_rxd_sta_init, + .rxd_refill = mwl8k_rxd_sta_refill, + .rxd_process = mwl8k_rxd_sta_process, +}; + + +#define MWL8K_RX_DESCS 256 +#define MWL8K_RX_MAXSZ 3800 + +static int mwl8k_rxq_init(struct ieee80211_hw *hw, int index) +{ + struct mwl8k_priv *priv = hw->priv; + struct mwl8k_rx_queue *rxq = priv->rxq + index; + int size; + int i; + + rxq->rxd_count = 0; + rxq->head = 0; + rxq->tail = 0; + + size = MWL8K_RX_DESCS * priv->rxd_ops->rxd_size; + + rxq->rxd = pci_zalloc_consistent(priv->pdev, size, &rxq->rxd_dma); + if (rxq->rxd == NULL) { + wiphy_err(hw->wiphy, "failed to alloc RX descriptors\n"); + return -ENOMEM; + } + + rxq->buf = kcalloc(MWL8K_RX_DESCS, sizeof(*rxq->buf), GFP_KERNEL); + if (rxq->buf == NULL) { + pci_free_consistent(priv->pdev, size, rxq->rxd, rxq->rxd_dma); + return -ENOMEM; + } + + for (i = 0; i < MWL8K_RX_DESCS; i++) { + int desc_size; + void *rxd; + int nexti; + dma_addr_t next_dma_addr; + + desc_size = priv->rxd_ops->rxd_size; + rxd = rxq->rxd + (i * priv->rxd_ops->rxd_size); + + nexti = i + 1; + if (nexti == MWL8K_RX_DESCS) + nexti = 0; + next_dma_addr = rxq->rxd_dma + (nexti * desc_size); + + priv->rxd_ops->rxd_init(rxd, next_dma_addr); + } + + return 0; +} + +static int rxq_refill(struct ieee80211_hw *hw, int index, int limit) +{ + struct mwl8k_priv *priv = hw->priv; + struct mwl8k_rx_queue *rxq = priv->rxq + index; + int refilled; + + refilled = 0; + while (rxq->rxd_count < MWL8K_RX_DESCS && limit--) { + struct sk_buff *skb; + dma_addr_t addr; + int rx; + void *rxd; + + skb = dev_alloc_skb(MWL8K_RX_MAXSZ); + if (skb == NULL) + break; + + addr = pci_map_single(priv->pdev, skb->data, + MWL8K_RX_MAXSZ, DMA_FROM_DEVICE); + + rxq->rxd_count++; + rx = rxq->tail++; + if (rxq->tail == MWL8K_RX_DESCS) + rxq->tail = 0; + rxq->buf[rx].skb = skb; + dma_unmap_addr_set(&rxq->buf[rx], dma, addr); + + rxd = rxq->rxd + (rx * priv->rxd_ops->rxd_size); + priv->rxd_ops->rxd_refill(rxd, addr, MWL8K_RX_MAXSZ); + + refilled++; + } + + return refilled; +} + +/* Must be called only when the card's reception is completely halted */ +static void mwl8k_rxq_deinit(struct ieee80211_hw *hw, int index) +{ + struct mwl8k_priv *priv = hw->priv; + struct mwl8k_rx_queue *rxq = priv->rxq + index; + int i; + + if (rxq->rxd == NULL) + return; + + for (i = 0; i < MWL8K_RX_DESCS; i++) { + if (rxq->buf[i].skb != NULL) { + pci_unmap_single(priv->pdev, + dma_unmap_addr(&rxq->buf[i], dma), + MWL8K_RX_MAXSZ, PCI_DMA_FROMDEVICE); + dma_unmap_addr_set(&rxq->buf[i], dma, 0); + + kfree_skb(rxq->buf[i].skb); + rxq->buf[i].skb = NULL; + } + } + + kfree(rxq->buf); + rxq->buf = NULL; + + pci_free_consistent(priv->pdev, + MWL8K_RX_DESCS * priv->rxd_ops->rxd_size, + rxq->rxd, rxq->rxd_dma); + rxq->rxd = NULL; +} + + +/* + * Scan a list of BSSIDs to process for finalize join. + * Allows for extension to process multiple BSSIDs. + */ +static inline int +mwl8k_capture_bssid(struct mwl8k_priv *priv, struct ieee80211_hdr *wh) +{ + return priv->capture_beacon && + ieee80211_is_beacon(wh->frame_control) && + ether_addr_equal_64bits(wh->addr3, priv->capture_bssid); +} + +static inline void mwl8k_save_beacon(struct ieee80211_hw *hw, + struct sk_buff *skb) +{ + struct mwl8k_priv *priv = hw->priv; + + priv->capture_beacon = false; + eth_zero_addr(priv->capture_bssid); + + /* + * Use GFP_ATOMIC as rxq_process is called from + * the primary interrupt handler, memory allocation call + * must not sleep. + */ + priv->beacon_skb = skb_copy(skb, GFP_ATOMIC); + if (priv->beacon_skb != NULL) + ieee80211_queue_work(hw, &priv->finalize_join_worker); +} + +static inline struct mwl8k_vif *mwl8k_find_vif_bss(struct list_head *vif_list, + u8 *bssid) +{ + struct mwl8k_vif *mwl8k_vif; + + list_for_each_entry(mwl8k_vif, + vif_list, list) { + if (memcmp(bssid, mwl8k_vif->bssid, + ETH_ALEN) == 0) + return mwl8k_vif; + } + + return NULL; +} + +static int rxq_process(struct ieee80211_hw *hw, int index, int limit) +{ + struct mwl8k_priv *priv = hw->priv; + struct mwl8k_vif *mwl8k_vif = NULL; + struct mwl8k_rx_queue *rxq = priv->rxq + index; + int processed; + + processed = 0; + while (rxq->rxd_count && limit--) { + struct sk_buff *skb; + void *rxd; + int pkt_len; + struct ieee80211_rx_status status; + struct ieee80211_hdr *wh; + __le16 qos; + + skb = rxq->buf[rxq->head].skb; + if (skb == NULL) + break; + + rxd = rxq->rxd + (rxq->head * priv->rxd_ops->rxd_size); + + pkt_len = priv->rxd_ops->rxd_process(rxd, &status, &qos, + &priv->noise); + if (pkt_len < 0) + break; + + rxq->buf[rxq->head].skb = NULL; + + pci_unmap_single(priv->pdev, + dma_unmap_addr(&rxq->buf[rxq->head], dma), + MWL8K_RX_MAXSZ, PCI_DMA_FROMDEVICE); + dma_unmap_addr_set(&rxq->buf[rxq->head], dma, 0); + + rxq->head++; + if (rxq->head == MWL8K_RX_DESCS) + rxq->head = 0; + + rxq->rxd_count--; + + wh = &((struct mwl8k_dma_data *)skb->data)->wh; + + /* + * Check for a pending join operation. Save a + * copy of the beacon and schedule a tasklet to + * send a FINALIZE_JOIN command to the firmware. + */ + if (mwl8k_capture_bssid(priv, (void *)skb->data)) + mwl8k_save_beacon(hw, skb); + + if (ieee80211_has_protected(wh->frame_control)) { + + /* Check if hw crypto has been enabled for + * this bss. If yes, set the status flags + * accordingly + */ + mwl8k_vif = mwl8k_find_vif_bss(&priv->vif_list, + wh->addr1); + + if (mwl8k_vif != NULL && + mwl8k_vif->is_hw_crypto_enabled) { + /* + * When MMIC ERROR is encountered + * by the firmware, payload is + * dropped and only 32 bytes of + * mwl8k Firmware header is sent + * to the host. + * + * We need to add four bytes of + * key information. In it + * MAC80211 expects keyidx set to + * 0 for triggering Counter + * Measure of MMIC failure. + */ + if (status.flag & RX_FLAG_MMIC_ERROR) { + struct mwl8k_dma_data *tr; + tr = (struct mwl8k_dma_data *)skb->data; + memset((void *)&(tr->data), 0, 4); + pkt_len += 4; + } + + if (!ieee80211_is_auth(wh->frame_control)) + status.flag |= RX_FLAG_IV_STRIPPED | + RX_FLAG_DECRYPTED | + RX_FLAG_MMIC_STRIPPED; + } + } + + skb_put(skb, pkt_len); + mwl8k_remove_dma_header(skb, qos); + memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status)); + ieee80211_rx_irqsafe(hw, skb); + + processed++; + } + + return processed; +} + + +/* + * Packet transmission. + */ + +#define MWL8K_TXD_STATUS_OK 0x00000001 +#define MWL8K_TXD_STATUS_OK_RETRY 0x00000002 +#define MWL8K_TXD_STATUS_OK_MORE_RETRY 0x00000004 +#define MWL8K_TXD_STATUS_MULTICAST_TX 0x00000008 +#define MWL8K_TXD_STATUS_FW_OWNED 0x80000000 + +#define MWL8K_QOS_QLEN_UNSPEC 0xff00 +#define MWL8K_QOS_ACK_POLICY_MASK 0x0060 +#define MWL8K_QOS_ACK_POLICY_NORMAL 0x0000 +#define MWL8K_QOS_ACK_POLICY_BLOCKACK 0x0060 +#define MWL8K_QOS_EOSP 0x0010 + +struct mwl8k_tx_desc { + __le32 status; + __u8 data_rate; + __u8 tx_priority; + __le16 qos_control; + __le32 pkt_phys_addr; + __le16 pkt_len; + __u8 dest_MAC_addr[ETH_ALEN]; + __le32 next_txd_phys_addr; + __le32 timestamp; + __le16 rate_info; + __u8 peer_id; + __u8 tx_frag_cnt; +} __packed; + +#define MWL8K_TX_DESCS 128 + +static int mwl8k_txq_init(struct ieee80211_hw *hw, int index) +{ + struct mwl8k_priv *priv = hw->priv; + struct mwl8k_tx_queue *txq = priv->txq + index; + int size; + int i; + + txq->len = 0; + txq->head = 0; + txq->tail = 0; + + size = MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc); + + txq->txd = pci_zalloc_consistent(priv->pdev, size, &txq->txd_dma); + if (txq->txd == NULL) { + wiphy_err(hw->wiphy, "failed to alloc TX descriptors\n"); + return -ENOMEM; + } + + txq->skb = kcalloc(MWL8K_TX_DESCS, sizeof(*txq->skb), GFP_KERNEL); + if (txq->skb == NULL) { + pci_free_consistent(priv->pdev, size, txq->txd, txq->txd_dma); + return -ENOMEM; + } + + for (i = 0; i < MWL8K_TX_DESCS; i++) { + struct mwl8k_tx_desc *tx_desc; + int nexti; + + tx_desc = txq->txd + i; + nexti = (i + 1) % MWL8K_TX_DESCS; + + tx_desc->status = 0; + tx_desc->next_txd_phys_addr = + cpu_to_le32(txq->txd_dma + nexti * sizeof(*tx_desc)); + } + + return 0; +} + +static inline void mwl8k_tx_start(struct mwl8k_priv *priv) +{ + iowrite32(MWL8K_H2A_INT_PPA_READY, + priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS); + iowrite32(MWL8K_H2A_INT_DUMMY, + priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS); + ioread32(priv->regs + MWL8K_HIU_INT_CODE); +} + +static void mwl8k_dump_tx_rings(struct ieee80211_hw *hw) +{ + struct mwl8k_priv *priv = hw->priv; + int i; + + for (i = 0; i < mwl8k_tx_queues(priv); i++) { + struct mwl8k_tx_queue *txq = priv->txq + i; + int fw_owned = 0; + int drv_owned = 0; + int unused = 0; + int desc; + + for (desc = 0; desc < MWL8K_TX_DESCS; desc++) { + struct mwl8k_tx_desc *tx_desc = txq->txd + desc; + u32 status; + + status = le32_to_cpu(tx_desc->status); + if (status & MWL8K_TXD_STATUS_FW_OWNED) + fw_owned++; + else + drv_owned++; + + if (tx_desc->pkt_len == 0) + unused++; + } + + wiphy_err(hw->wiphy, + "txq[%d] len=%d head=%d tail=%d " + "fw_owned=%d drv_owned=%d unused=%d\n", + i, + txq->len, txq->head, txq->tail, + fw_owned, drv_owned, unused); + } +} + +/* + * Must be called with priv->fw_mutex held and tx queues stopped. + */ +#define MWL8K_TX_WAIT_TIMEOUT_MS 5000 + +static int mwl8k_tx_wait_empty(struct ieee80211_hw *hw) +{ + struct mwl8k_priv *priv = hw->priv; + DECLARE_COMPLETION_ONSTACK(tx_wait); + int retry; + int rc; + + might_sleep(); + + /* Since fw restart is in progress, allow only the firmware + * commands from the restart code and block the other + * commands since they are going to fail in any case since + * the firmware has crashed + */ + if (priv->hw_restart_in_progress) { + if (priv->hw_restart_owner == current) + return 0; + else + return -EBUSY; + } + + if (atomic_read(&priv->watchdog_event_pending)) + return 0; + + /* + * The TX queues are stopped at this point, so this test + * doesn't need to take ->tx_lock. + */ + if (!priv->pending_tx_pkts) + return 0; + + retry = 1; + rc = 0; + + spin_lock_bh(&priv->tx_lock); + priv->tx_wait = &tx_wait; + while (!rc) { + int oldcount; + unsigned long timeout; + + oldcount = priv->pending_tx_pkts; + + spin_unlock_bh(&priv->tx_lock); + timeout = wait_for_completion_timeout(&tx_wait, + msecs_to_jiffies(MWL8K_TX_WAIT_TIMEOUT_MS)); + + if (atomic_read(&priv->watchdog_event_pending)) { + spin_lock_bh(&priv->tx_lock); + priv->tx_wait = NULL; + spin_unlock_bh(&priv->tx_lock); + return 0; + } + + spin_lock_bh(&priv->tx_lock); + + if (timeout || !priv->pending_tx_pkts) { + WARN_ON(priv->pending_tx_pkts); + if (retry) + wiphy_notice(hw->wiphy, "tx rings drained\n"); + break; + } + + if (retry) { + mwl8k_tx_start(priv); + retry = 0; + continue; + } + + if (priv->pending_tx_pkts < oldcount) { + wiphy_notice(hw->wiphy, + "waiting for tx rings to drain (%d -> %d pkts)\n", + oldcount, priv->pending_tx_pkts); + retry = 1; + continue; + } + + priv->tx_wait = NULL; + + wiphy_err(hw->wiphy, "tx rings stuck for %d ms\n", + MWL8K_TX_WAIT_TIMEOUT_MS); + mwl8k_dump_tx_rings(hw); + priv->hw_restart_in_progress = true; + ieee80211_queue_work(hw, &priv->fw_reload); + + rc = -ETIMEDOUT; + } + priv->tx_wait = NULL; + spin_unlock_bh(&priv->tx_lock); + + return rc; +} + +#define MWL8K_TXD_SUCCESS(status) \ + ((status) & (MWL8K_TXD_STATUS_OK | \ + MWL8K_TXD_STATUS_OK_RETRY | \ + MWL8K_TXD_STATUS_OK_MORE_RETRY)) + +static int mwl8k_tid_queue_mapping(u8 tid) +{ + BUG_ON(tid > 7); + + switch (tid) { + case 0: + case 3: + return IEEE80211_AC_BE; + case 1: + case 2: + return IEEE80211_AC_BK; + case 4: + case 5: + return IEEE80211_AC_VI; + case 6: + case 7: + return IEEE80211_AC_VO; + default: + return -1; + } +} + +/* The firmware will fill in the rate information + * for each packet that gets queued in the hardware + * and these macros will interpret that info. + */ + +#define RI_FORMAT(a) (a & 0x0001) +#define RI_RATE_ID_MCS(a) ((a & 0x01f8) >> 3) + +static int +mwl8k_txq_reclaim(struct ieee80211_hw *hw, int index, int limit, int force) +{ + struct mwl8k_priv *priv = hw->priv; + struct mwl8k_tx_queue *txq = priv->txq + index; + int processed; + + processed = 0; + while (txq->len > 0 && limit--) { + int tx; + struct mwl8k_tx_desc *tx_desc; + unsigned long addr; + int size; + struct sk_buff *skb; + struct ieee80211_tx_info *info; + u32 status; + struct ieee80211_sta *sta; + struct mwl8k_sta *sta_info = NULL; + u16 rate_info; + struct ieee80211_hdr *wh; + + tx = txq->head; + tx_desc = txq->txd + tx; + + status = le32_to_cpu(tx_desc->status); + + if (status & MWL8K_TXD_STATUS_FW_OWNED) { + if (!force) + break; + tx_desc->status &= + ~cpu_to_le32(MWL8K_TXD_STATUS_FW_OWNED); + } + + txq->head = (tx + 1) % MWL8K_TX_DESCS; + BUG_ON(txq->len == 0); + txq->len--; + priv->pending_tx_pkts--; + + addr = le32_to_cpu(tx_desc->pkt_phys_addr); + size = le16_to_cpu(tx_desc->pkt_len); + skb = txq->skb[tx]; + txq->skb[tx] = NULL; + + BUG_ON(skb == NULL); + pci_unmap_single(priv->pdev, addr, size, PCI_DMA_TODEVICE); + + mwl8k_remove_dma_header(skb, tx_desc->qos_control); + + wh = (struct ieee80211_hdr *) skb->data; + + /* Mark descriptor as unused */ + tx_desc->pkt_phys_addr = 0; + tx_desc->pkt_len = 0; + + info = IEEE80211_SKB_CB(skb); + if (ieee80211_is_data(wh->frame_control)) { + rcu_read_lock(); + sta = ieee80211_find_sta_by_ifaddr(hw, wh->addr1, + wh->addr2); + if (sta) { + sta_info = MWL8K_STA(sta); + BUG_ON(sta_info == NULL); + rate_info = le16_to_cpu(tx_desc->rate_info); + /* If rate is < 6.5 Mpbs for an ht station + * do not form an ampdu. If the station is a + * legacy station (format = 0), do not form an + * ampdu + */ + if (RI_RATE_ID_MCS(rate_info) < 1 || + RI_FORMAT(rate_info) == 0) { + sta_info->is_ampdu_allowed = false; + } else { + sta_info->is_ampdu_allowed = true; + } + } + rcu_read_unlock(); + } + + ieee80211_tx_info_clear_status(info); + + /* Rate control is happening in the firmware. + * Ensure no tx rate is being reported. + */ + info->status.rates[0].idx = -1; + info->status.rates[0].count = 1; + + if (MWL8K_TXD_SUCCESS(status)) + info->flags |= IEEE80211_TX_STAT_ACK; + + ieee80211_tx_status_irqsafe(hw, skb); + + processed++; + } + + return processed; +} + +/* must be called only when the card's transmit is completely halted */ +static void mwl8k_txq_deinit(struct ieee80211_hw *hw, int index) +{ + struct mwl8k_priv *priv = hw->priv; + struct mwl8k_tx_queue *txq = priv->txq + index; + + if (txq->txd == NULL) + return; + + mwl8k_txq_reclaim(hw, index, INT_MAX, 1); + + kfree(txq->skb); + txq->skb = NULL; + + pci_free_consistent(priv->pdev, + MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc), + txq->txd, txq->txd_dma); + txq->txd = NULL; +} + +/* caller must hold priv->stream_lock when calling the stream functions */ +static struct mwl8k_ampdu_stream * +mwl8k_add_stream(struct ieee80211_hw *hw, struct ieee80211_sta *sta, u8 tid) +{ + struct mwl8k_ampdu_stream *stream; + struct mwl8k_priv *priv = hw->priv; + int i; + + for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) { + stream = &priv->ampdu[i]; + if (stream->state == AMPDU_NO_STREAM) { + stream->sta = sta; + stream->state = AMPDU_STREAM_NEW; + stream->tid = tid; + stream->idx = i; + wiphy_debug(hw->wiphy, "Added a new stream for %pM %d", + sta->addr, tid); + return stream; + } + } + return NULL; +} + +static int +mwl8k_start_stream(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream) +{ + int ret; + + /* if the stream has already been started, don't start it again */ + if (stream->state != AMPDU_STREAM_NEW) + return 0; + ret = ieee80211_start_tx_ba_session(stream->sta, stream->tid, 0); + if (ret) + wiphy_debug(hw->wiphy, "Failed to start stream for %pM %d: " + "%d\n", stream->sta->addr, stream->tid, ret); + else + wiphy_debug(hw->wiphy, "Started stream for %pM %d\n", + stream->sta->addr, stream->tid); + return ret; +} + +static void +mwl8k_remove_stream(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream) +{ + wiphy_debug(hw->wiphy, "Remove stream for %pM %d\n", stream->sta->addr, + stream->tid); + memset(stream, 0, sizeof(*stream)); +} + +static struct mwl8k_ampdu_stream * +mwl8k_lookup_stream(struct ieee80211_hw *hw, u8 *addr, u8 tid) +{ + struct mwl8k_priv *priv = hw->priv; + int i; + + for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) { + struct mwl8k_ampdu_stream *stream; + stream = &priv->ampdu[i]; + if (stream->state == AMPDU_NO_STREAM) + continue; + if (!memcmp(stream->sta->addr, addr, ETH_ALEN) && + stream->tid == tid) + return stream; + } + return NULL; +} + +#define MWL8K_AMPDU_PACKET_THRESHOLD 64 +static inline bool mwl8k_ampdu_allowed(struct ieee80211_sta *sta, u8 tid) +{ + struct mwl8k_sta *sta_info = MWL8K_STA(sta); + struct tx_traffic_info *tx_stats; + + BUG_ON(tid >= MWL8K_MAX_TID); + tx_stats = &sta_info->tx_stats[tid]; + + return sta_info->is_ampdu_allowed && + tx_stats->pkts > MWL8K_AMPDU_PACKET_THRESHOLD; +} + +static inline void mwl8k_tx_count_packet(struct ieee80211_sta *sta, u8 tid) +{ + struct mwl8k_sta *sta_info = MWL8K_STA(sta); + struct tx_traffic_info *tx_stats; + + BUG_ON(tid >= MWL8K_MAX_TID); + tx_stats = &sta_info->tx_stats[tid]; + + if (tx_stats->start_time == 0) + tx_stats->start_time = jiffies; + + /* reset the packet count after each second elapses. If the number of + * packets ever exceeds the ampdu_min_traffic threshold, we will allow + * an ampdu stream to be started. + */ + if (jiffies - tx_stats->start_time > HZ) { + tx_stats->pkts = 0; + tx_stats->start_time = 0; + } else + tx_stats->pkts++; +} + +/* The hardware ampdu queues start from 5. + * txpriorities for ampdu queues are + * 5 6 7 0 1 2 3 4 ie., queue 5 is highest + * and queue 3 is lowest (queue 4 is reserved) + */ +#define BA_QUEUE 5 + +static void +mwl8k_txq_xmit(struct ieee80211_hw *hw, + int index, + struct ieee80211_sta *sta, + struct sk_buff *skb) +{ + struct mwl8k_priv *priv = hw->priv; + struct ieee80211_tx_info *tx_info; + struct mwl8k_vif *mwl8k_vif; + struct ieee80211_hdr *wh; + struct mwl8k_tx_queue *txq; + struct mwl8k_tx_desc *tx; + dma_addr_t dma; + u32 txstatus; + u8 txdatarate; + u16 qos; + int txpriority; + u8 tid = 0; + struct mwl8k_ampdu_stream *stream = NULL; + bool start_ba_session = false; + bool mgmtframe = false; + struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data; + bool eapol_frame = false; + + wh = (struct ieee80211_hdr *)skb->data; + if (ieee80211_is_data_qos(wh->frame_control)) + qos = le16_to_cpu(*((__le16 *)ieee80211_get_qos_ctl(wh))); + else + qos = 0; + + if (skb->protocol == cpu_to_be16(ETH_P_PAE)) + eapol_frame = true; + + if (ieee80211_is_mgmt(wh->frame_control)) + mgmtframe = true; + + if (priv->ap_fw) + mwl8k_encapsulate_tx_frame(priv, skb); + else + mwl8k_add_dma_header(priv, skb, 0, 0); + + wh = &((struct mwl8k_dma_data *)skb->data)->wh; + + tx_info = IEEE80211_SKB_CB(skb); + mwl8k_vif = MWL8K_VIF(tx_info->control.vif); + + if (tx_info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) { + wh->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); + wh->seq_ctrl |= cpu_to_le16(mwl8k_vif->seqno); + mwl8k_vif->seqno += 0x10; + } + + /* Setup firmware control bit fields for each frame type. */ + txstatus = 0; + txdatarate = 0; + if (ieee80211_is_mgmt(wh->frame_control) || + ieee80211_is_ctl(wh->frame_control)) { + txdatarate = 0; + qos |= MWL8K_QOS_QLEN_UNSPEC | MWL8K_QOS_EOSP; + } else if (ieee80211_is_data(wh->frame_control)) { + txdatarate = 1; + if (is_multicast_ether_addr(wh->addr1)) + txstatus |= MWL8K_TXD_STATUS_MULTICAST_TX; + + qos &= ~MWL8K_QOS_ACK_POLICY_MASK; + if (tx_info->flags & IEEE80211_TX_CTL_AMPDU) + qos |= MWL8K_QOS_ACK_POLICY_BLOCKACK; + else + qos |= MWL8K_QOS_ACK_POLICY_NORMAL; + } + + /* Queue ADDBA request in the respective data queue. While setting up + * the ampdu stream, mac80211 queues further packets for that + * particular ra/tid pair. However, packets piled up in the hardware + * for that ra/tid pair will still go out. ADDBA request and the + * related data packets going out from different queues asynchronously + * will cause a shift in the receiver window which might result in + * ampdu packets getting dropped at the receiver after the stream has + * been setup. + */ + if (unlikely(ieee80211_is_action(wh->frame_control) && + mgmt->u.action.category == WLAN_CATEGORY_BACK && + mgmt->u.action.u.addba_req.action_code == WLAN_ACTION_ADDBA_REQ && + priv->ap_fw)) { + u16 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab); + tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2; + index = mwl8k_tid_queue_mapping(tid); + } + + txpriority = index; + + if (priv->ap_fw && sta && sta->ht_cap.ht_supported && !eapol_frame && + ieee80211_is_data_qos(wh->frame_control)) { + tid = qos & 0xf; + mwl8k_tx_count_packet(sta, tid); + spin_lock(&priv->stream_lock); + stream = mwl8k_lookup_stream(hw, sta->addr, tid); + if (stream != NULL) { + if (stream->state == AMPDU_STREAM_ACTIVE) { + WARN_ON(!(qos & MWL8K_QOS_ACK_POLICY_BLOCKACK)); + txpriority = (BA_QUEUE + stream->idx) % + TOTAL_HW_TX_QUEUES; + if (stream->idx <= 1) + index = stream->idx + + MWL8K_TX_WMM_QUEUES; + + } else if (stream->state == AMPDU_STREAM_NEW) { + /* We get here if the driver sends us packets + * after we've initiated a stream, but before + * our ampdu_action routine has been called + * with IEEE80211_AMPDU_TX_START to get the SSN + * for the ADDBA request. So this packet can + * go out with no risk of sequence number + * mismatch. No special handling is required. + */ + } else { + /* Drop packets that would go out after the + * ADDBA request was sent but before the ADDBA + * response is received. If we don't do this, + * the recipient would probably receive it + * after the ADDBA request with SSN 0. This + * will cause the recipient's BA receive window + * to shift, which would cause the subsequent + * packets in the BA stream to be discarded. + * mac80211 queues our packets for us in this + * case, so this is really just a safety check. + */ + wiphy_warn(hw->wiphy, + "Cannot send packet while ADDBA " + "dialog is underway.\n"); + spin_unlock(&priv->stream_lock); + dev_kfree_skb(skb); + return; + } + } else { + /* Defer calling mwl8k_start_stream so that the current + * skb can go out before the ADDBA request. This + * prevents sequence number mismatch at the recepient + * as described above. + */ + if (mwl8k_ampdu_allowed(sta, tid)) { + stream = mwl8k_add_stream(hw, sta, tid); + if (stream != NULL) + start_ba_session = true; + } + } + spin_unlock(&priv->stream_lock); + } else { + qos &= ~MWL8K_QOS_ACK_POLICY_MASK; + qos |= MWL8K_QOS_ACK_POLICY_NORMAL; + } + + dma = pci_map_single(priv->pdev, skb->data, + skb->len, PCI_DMA_TODEVICE); + + if (pci_dma_mapping_error(priv->pdev, dma)) { + wiphy_debug(hw->wiphy, + "failed to dma map skb, dropping TX frame.\n"); + if (start_ba_session) { + spin_lock(&priv->stream_lock); + mwl8k_remove_stream(hw, stream); + spin_unlock(&priv->stream_lock); + } + dev_kfree_skb(skb); + return; + } + + spin_lock_bh(&priv->tx_lock); + + txq = priv->txq + index; + + /* Mgmt frames that go out frequently are probe + * responses. Other mgmt frames got out relatively + * infrequently. Hence reserve 2 buffers so that + * other mgmt frames do not get dropped due to an + * already queued probe response in one of the + * reserved buffers. + */ + + if (txq->len >= MWL8K_TX_DESCS - 2) { + if (!mgmtframe || txq->len == MWL8K_TX_DESCS) { + if (start_ba_session) { + spin_lock(&priv->stream_lock); + mwl8k_remove_stream(hw, stream); + spin_unlock(&priv->stream_lock); + } + mwl8k_tx_start(priv); + spin_unlock_bh(&priv->tx_lock); + pci_unmap_single(priv->pdev, dma, skb->len, + PCI_DMA_TODEVICE); + dev_kfree_skb(skb); + return; + } + } + + BUG_ON(txq->skb[txq->tail] != NULL); + txq->skb[txq->tail] = skb; + + tx = txq->txd + txq->tail; + tx->data_rate = txdatarate; + tx->tx_priority = txpriority; + tx->qos_control = cpu_to_le16(qos); + tx->pkt_phys_addr = cpu_to_le32(dma); + tx->pkt_len = cpu_to_le16(skb->len); + tx->rate_info = 0; + if (!priv->ap_fw && sta != NULL) + tx->peer_id = MWL8K_STA(sta)->peer_id; + else + tx->peer_id = 0; + + if (priv->ap_fw && ieee80211_is_data(wh->frame_control) && !eapol_frame) + tx->timestamp = cpu_to_le32(ioread32(priv->regs + + MWL8K_HW_TIMER_REGISTER)); + else + tx->timestamp = 0; + + wmb(); + tx->status = cpu_to_le32(MWL8K_TXD_STATUS_FW_OWNED | txstatus); + + txq->len++; + priv->pending_tx_pkts++; + + txq->tail++; + if (txq->tail == MWL8K_TX_DESCS) + txq->tail = 0; + + mwl8k_tx_start(priv); + + spin_unlock_bh(&priv->tx_lock); + + /* Initiate the ampdu session here */ + if (start_ba_session) { + spin_lock(&priv->stream_lock); + if (mwl8k_start_stream(hw, stream)) + mwl8k_remove_stream(hw, stream); + spin_unlock(&priv->stream_lock); + } +} + + +/* + * Firmware access. + * + * We have the following requirements for issuing firmware commands: + * - Some commands require that the packet transmit path is idle when + * the command is issued. (For simplicity, we'll just quiesce the + * transmit path for every command.) + * - There are certain sequences of commands that need to be issued to + * the hardware sequentially, with no other intervening commands. + * + * This leads to an implementation of a "firmware lock" as a mutex that + * can be taken recursively, and which is taken by both the low-level + * command submission function (mwl8k_post_cmd) as well as any users of + * that function that require issuing of an atomic sequence of commands, + * and quiesces the transmit path whenever it's taken. + */ +static int mwl8k_fw_lock(struct ieee80211_hw *hw) +{ + struct mwl8k_priv *priv = hw->priv; + + if (priv->fw_mutex_owner != current) { + int rc; + + mutex_lock(&priv->fw_mutex); + ieee80211_stop_queues(hw); + + rc = mwl8k_tx_wait_empty(hw); + if (rc) { + if (!priv->hw_restart_in_progress) + ieee80211_wake_queues(hw); + + mutex_unlock(&priv->fw_mutex); + + return rc; + } + + priv->fw_mutex_owner = current; + } + + priv->fw_mutex_depth++; + + return 0; +} + +static void mwl8k_fw_unlock(struct ieee80211_hw *hw) +{ + struct mwl8k_priv *priv = hw->priv; + + if (!--priv->fw_mutex_depth) { + if (!priv->hw_restart_in_progress) + ieee80211_wake_queues(hw); + + priv->fw_mutex_owner = NULL; + mutex_unlock(&priv->fw_mutex); + } +} + +static void mwl8k_enable_bsses(struct ieee80211_hw *hw, bool enable, + u32 bitmap); + +/* + * Command processing. + */ + +/* Timeout firmware commands after 10s */ +#define MWL8K_CMD_TIMEOUT_MS 10000 + +static int mwl8k_post_cmd(struct ieee80211_hw *hw, struct mwl8k_cmd_pkt *cmd) +{ + DECLARE_COMPLETION_ONSTACK(cmd_wait); + struct mwl8k_priv *priv = hw->priv; + void __iomem *regs = priv->regs; + dma_addr_t dma_addr; + unsigned int dma_size; + int rc; + unsigned long timeout = 0; + u8 buf[32]; + u32 bitmap = 0; + + wiphy_dbg(hw->wiphy, "Posting %s [%d]\n", + mwl8k_cmd_name(cmd->code, buf, sizeof(buf)), cmd->macid); + + /* Before posting firmware commands that could change the hardware + * characteristics, make sure that all BSSes are stopped temporary. + * Enable these stopped BSSes after completion of the commands + */ + + rc = mwl8k_fw_lock(hw); + if (rc) + return rc; + + if (priv->ap_fw && priv->running_bsses) { + switch (le16_to_cpu(cmd->code)) { + case MWL8K_CMD_SET_RF_CHANNEL: + case MWL8K_CMD_RADIO_CONTROL: + case MWL8K_CMD_RF_TX_POWER: + case MWL8K_CMD_TX_POWER: + case MWL8K_CMD_RF_ANTENNA: + case MWL8K_CMD_RTS_THRESHOLD: + case MWL8K_CMD_MIMO_CONFIG: + bitmap = priv->running_bsses; + mwl8k_enable_bsses(hw, false, bitmap); + break; + } + } + + cmd->result = (__force __le16) 0xffff; + dma_size = le16_to_cpu(cmd->length); + dma_addr = pci_map_single(priv->pdev, cmd, dma_size, + PCI_DMA_BIDIRECTIONAL); + if (pci_dma_mapping_error(priv->pdev, dma_addr)) + return -ENOMEM; + + priv->hostcmd_wait = &cmd_wait; + iowrite32(dma_addr, regs + MWL8K_HIU_GEN_PTR); + iowrite32(MWL8K_H2A_INT_DOORBELL, + regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS); + iowrite32(MWL8K_H2A_INT_DUMMY, + regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS); + + timeout = wait_for_completion_timeout(&cmd_wait, + msecs_to_jiffies(MWL8K_CMD_TIMEOUT_MS)); + + priv->hostcmd_wait = NULL; + + + pci_unmap_single(priv->pdev, dma_addr, dma_size, + PCI_DMA_BIDIRECTIONAL); + + if (!timeout) { + wiphy_err(hw->wiphy, "Command %s timeout after %u ms\n", + mwl8k_cmd_name(cmd->code, buf, sizeof(buf)), + MWL8K_CMD_TIMEOUT_MS); + rc = -ETIMEDOUT; + } else { + int ms; + + ms = MWL8K_CMD_TIMEOUT_MS - jiffies_to_msecs(timeout); + + rc = cmd->result ? -EINVAL : 0; + if (rc) + wiphy_err(hw->wiphy, "Command %s error 0x%x\n", + mwl8k_cmd_name(cmd->code, buf, sizeof(buf)), + le16_to_cpu(cmd->result)); + else if (ms > 2000) + wiphy_notice(hw->wiphy, "Command %s took %d ms\n", + mwl8k_cmd_name(cmd->code, + buf, sizeof(buf)), + ms); + } + + if (bitmap) + mwl8k_enable_bsses(hw, true, bitmap); + + mwl8k_fw_unlock(hw); + + return rc; +} + +static int mwl8k_post_pervif_cmd(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + struct mwl8k_cmd_pkt *cmd) +{ + if (vif != NULL) + cmd->macid = MWL8K_VIF(vif)->macid; + return mwl8k_post_cmd(hw, cmd); +} + +/* + * Setup code shared between STA and AP firmware images. + */ +static void mwl8k_setup_2ghz_band(struct ieee80211_hw *hw) +{ + struct mwl8k_priv *priv = hw->priv; + + BUILD_BUG_ON(sizeof(priv->channels_24) != sizeof(mwl8k_channels_24)); + memcpy(priv->channels_24, mwl8k_channels_24, sizeof(mwl8k_channels_24)); + + BUILD_BUG_ON(sizeof(priv->rates_24) != sizeof(mwl8k_rates_24)); + memcpy(priv->rates_24, mwl8k_rates_24, sizeof(mwl8k_rates_24)); + + priv->band_24.band = NL80211_BAND_2GHZ; + priv->band_24.channels = priv->channels_24; + priv->band_24.n_channels = ARRAY_SIZE(mwl8k_channels_24); + priv->band_24.bitrates = priv->rates_24; + priv->band_24.n_bitrates = ARRAY_SIZE(mwl8k_rates_24); + + hw->wiphy->bands[NL80211_BAND_2GHZ] = &priv->band_24; +} + +static void mwl8k_setup_5ghz_band(struct ieee80211_hw *hw) +{ + struct mwl8k_priv *priv = hw->priv; + + BUILD_BUG_ON(sizeof(priv->channels_50) != sizeof(mwl8k_channels_50)); + memcpy(priv->channels_50, mwl8k_channels_50, sizeof(mwl8k_channels_50)); + + BUILD_BUG_ON(sizeof(priv->rates_50) != sizeof(mwl8k_rates_50)); + memcpy(priv->rates_50, mwl8k_rates_50, sizeof(mwl8k_rates_50)); + + priv->band_50.band = NL80211_BAND_5GHZ; + priv->band_50.channels = priv->channels_50; + priv->band_50.n_channels = ARRAY_SIZE(mwl8k_channels_50); + priv->band_50.bitrates = priv->rates_50; + priv->band_50.n_bitrates = ARRAY_SIZE(mwl8k_rates_50); + + hw->wiphy->bands[NL80211_BAND_5GHZ] = &priv->band_50; +} + +/* + * CMD_GET_HW_SPEC (STA version). + */ +struct mwl8k_cmd_get_hw_spec_sta { + struct mwl8k_cmd_pkt header; + __u8 hw_rev; + __u8 host_interface; + __le16 num_mcaddrs; + __u8 perm_addr[ETH_ALEN]; + __le16 region_code; + __le32 fw_rev; + __le32 ps_cookie; + __le32 caps; + __u8 mcs_bitmap[16]; + __le32 rx_queue_ptr; + __le32 num_tx_queues; + __le32 tx_queue_ptrs[MWL8K_TX_WMM_QUEUES]; + __le32 caps2; + __le32 num_tx_desc_per_queue; + __le32 total_rxd; +} __packed; + +#define MWL8K_CAP_MAX_AMSDU 0x20000000 +#define MWL8K_CAP_GREENFIELD 0x08000000 +#define MWL8K_CAP_AMPDU 0x04000000 +#define MWL8K_CAP_RX_STBC 0x01000000 +#define MWL8K_CAP_TX_STBC 0x00800000 +#define MWL8K_CAP_SHORTGI_40MHZ 0x00400000 +#define MWL8K_CAP_SHORTGI_20MHZ 0x00200000 +#define MWL8K_CAP_RX_ANTENNA_MASK 0x000e0000 +#define MWL8K_CAP_TX_ANTENNA_MASK 0x0001c000 +#define MWL8K_CAP_DELAY_BA 0x00003000 +#define MWL8K_CAP_MIMO 0x00000200 +#define MWL8K_CAP_40MHZ 0x00000100 +#define MWL8K_CAP_BAND_MASK 0x00000007 +#define MWL8K_CAP_5GHZ 0x00000004 +#define MWL8K_CAP_2GHZ4 0x00000001 + +static void +mwl8k_set_ht_caps(struct ieee80211_hw *hw, + struct ieee80211_supported_band *band, u32 cap) +{ + int rx_streams; + int tx_streams; + + band->ht_cap.ht_supported = 1; + + if (cap & MWL8K_CAP_MAX_AMSDU) + band->ht_cap.cap |= IEEE80211_HT_CAP_MAX_AMSDU; + if (cap & MWL8K_CAP_GREENFIELD) + band->ht_cap.cap |= IEEE80211_HT_CAP_GRN_FLD; + if (cap & MWL8K_CAP_AMPDU) { + ieee80211_hw_set(hw, AMPDU_AGGREGATION); + band->ht_cap.ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K; + band->ht_cap.ampdu_density = IEEE80211_HT_MPDU_DENSITY_NONE; + } + if (cap & MWL8K_CAP_RX_STBC) + band->ht_cap.cap |= IEEE80211_HT_CAP_RX_STBC; + if (cap & MWL8K_CAP_TX_STBC) + band->ht_cap.cap |= IEEE80211_HT_CAP_TX_STBC; + if (cap & MWL8K_CAP_SHORTGI_40MHZ) + band->ht_cap.cap |= IEEE80211_HT_CAP_SGI_40; + if (cap & MWL8K_CAP_SHORTGI_20MHZ) + band->ht_cap.cap |= IEEE80211_HT_CAP_SGI_20; + if (cap & MWL8K_CAP_DELAY_BA) + band->ht_cap.cap |= IEEE80211_HT_CAP_DELAY_BA; + if (cap & MWL8K_CAP_40MHZ) + band->ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40; + + rx_streams = hweight32(cap & MWL8K_CAP_RX_ANTENNA_MASK); + tx_streams = hweight32(cap & MWL8K_CAP_TX_ANTENNA_MASK); + + band->ht_cap.mcs.rx_mask[0] = 0xff; + if (rx_streams >= 2) + band->ht_cap.mcs.rx_mask[1] = 0xff; + if (rx_streams >= 3) + band->ht_cap.mcs.rx_mask[2] = 0xff; + band->ht_cap.mcs.rx_mask[4] = 0x01; + band->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED; + + if (rx_streams != tx_streams) { + band->ht_cap.mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF; + band->ht_cap.mcs.tx_params |= (tx_streams - 1) << + IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT; + } +} + +static void +mwl8k_set_caps(struct ieee80211_hw *hw, u32 caps) +{ + struct mwl8k_priv *priv = hw->priv; + + if (priv->caps) + return; + + if ((caps & MWL8K_CAP_2GHZ4) || !(caps & MWL8K_CAP_BAND_MASK)) { + mwl8k_setup_2ghz_band(hw); + if (caps & MWL8K_CAP_MIMO) + mwl8k_set_ht_caps(hw, &priv->band_24, caps); + } + + if (caps & MWL8K_CAP_5GHZ) { + mwl8k_setup_5ghz_band(hw); + if (caps & MWL8K_CAP_MIMO) + mwl8k_set_ht_caps(hw, &priv->band_50, caps); + } + + priv->caps = caps; +} + +static int mwl8k_cmd_get_hw_spec_sta(struct ieee80211_hw *hw) +{ + struct mwl8k_priv *priv = hw->priv; + struct mwl8k_cmd_get_hw_spec_sta *cmd; + int rc; + int i; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_HW_SPEC); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + + memset(cmd->perm_addr, 0xff, sizeof(cmd->perm_addr)); + cmd->ps_cookie = cpu_to_le32(priv->cookie_dma); + cmd->rx_queue_ptr = cpu_to_le32(priv->rxq[0].rxd_dma); + cmd->num_tx_queues = cpu_to_le32(mwl8k_tx_queues(priv)); + for (i = 0; i < mwl8k_tx_queues(priv); i++) + cmd->tx_queue_ptrs[i] = cpu_to_le32(priv->txq[i].txd_dma); + cmd->num_tx_desc_per_queue = cpu_to_le32(MWL8K_TX_DESCS); + cmd->total_rxd = cpu_to_le32(MWL8K_RX_DESCS); + + rc = mwl8k_post_cmd(hw, &cmd->header); + + if (!rc) { + SET_IEEE80211_PERM_ADDR(hw, cmd->perm_addr); + priv->num_mcaddrs = le16_to_cpu(cmd->num_mcaddrs); + priv->fw_rev = le32_to_cpu(cmd->fw_rev); + priv->hw_rev = cmd->hw_rev; + mwl8k_set_caps(hw, le32_to_cpu(cmd->caps)); + priv->ap_macids_supported = 0x00000000; + priv->sta_macids_supported = 0x00000001; + } + + kfree(cmd); + return rc; +} + +/* + * CMD_GET_HW_SPEC (AP version). + */ +struct mwl8k_cmd_get_hw_spec_ap { + struct mwl8k_cmd_pkt header; + __u8 hw_rev; + __u8 host_interface; + __le16 num_wcb; + __le16 num_mcaddrs; + __u8 perm_addr[ETH_ALEN]; + __le16 region_code; + __le16 num_antenna; + __le32 fw_rev; + __le32 wcbbase0; + __le32 rxwrptr; + __le32 rxrdptr; + __le32 ps_cookie; + __le32 wcbbase1; + __le32 wcbbase2; + __le32 wcbbase3; + __le32 fw_api_version; + __le32 caps; + __le32 num_of_ampdu_queues; + __le32 wcbbase_ampdu[MWL8K_MAX_AMPDU_QUEUES]; +} __packed; + +static int mwl8k_cmd_get_hw_spec_ap(struct ieee80211_hw *hw) +{ + struct mwl8k_priv *priv = hw->priv; + struct mwl8k_cmd_get_hw_spec_ap *cmd; + int rc, i; + u32 api_version; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_HW_SPEC); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + + memset(cmd->perm_addr, 0xff, sizeof(cmd->perm_addr)); + cmd->ps_cookie = cpu_to_le32(priv->cookie_dma); + + rc = mwl8k_post_cmd(hw, &cmd->header); + + if (!rc) { + int off; + + api_version = le32_to_cpu(cmd->fw_api_version); + if (priv->device_info->fw_api_ap != api_version) { + printk(KERN_ERR "%s: Unsupported fw API version for %s." + " Expected %d got %d.\n", MWL8K_NAME, + priv->device_info->part_name, + priv->device_info->fw_api_ap, + api_version); + rc = -EINVAL; + goto done; + } + SET_IEEE80211_PERM_ADDR(hw, cmd->perm_addr); + priv->num_mcaddrs = le16_to_cpu(cmd->num_mcaddrs); + priv->fw_rev = le32_to_cpu(cmd->fw_rev); + priv->hw_rev = cmd->hw_rev; + mwl8k_set_caps(hw, le32_to_cpu(cmd->caps)); + priv->ap_macids_supported = 0x000000ff; + priv->sta_macids_supported = 0x00000100; + priv->num_ampdu_queues = le32_to_cpu(cmd->num_of_ampdu_queues); + if (priv->num_ampdu_queues > MWL8K_MAX_AMPDU_QUEUES) { + wiphy_warn(hw->wiphy, "fw reported %d ampdu queues" + " but we only support %d.\n", + priv->num_ampdu_queues, + MWL8K_MAX_AMPDU_QUEUES); + priv->num_ampdu_queues = MWL8K_MAX_AMPDU_QUEUES; + } + off = le32_to_cpu(cmd->rxwrptr) & 0xffff; + iowrite32(priv->rxq[0].rxd_dma, priv->sram + off); + + off = le32_to_cpu(cmd->rxrdptr) & 0xffff; + iowrite32(priv->rxq[0].rxd_dma, priv->sram + off); + + priv->txq_offset[0] = le32_to_cpu(cmd->wcbbase0) & 0xffff; + priv->txq_offset[1] = le32_to_cpu(cmd->wcbbase1) & 0xffff; + priv->txq_offset[2] = le32_to_cpu(cmd->wcbbase2) & 0xffff; + priv->txq_offset[3] = le32_to_cpu(cmd->wcbbase3) & 0xffff; + + for (i = 0; i < priv->num_ampdu_queues; i++) + priv->txq_offset[i + MWL8K_TX_WMM_QUEUES] = + le32_to_cpu(cmd->wcbbase_ampdu[i]) & 0xffff; + } + +done: + kfree(cmd); + return rc; +} + +/* + * CMD_SET_HW_SPEC. + */ +struct mwl8k_cmd_set_hw_spec { + struct mwl8k_cmd_pkt header; + __u8 hw_rev; + __u8 host_interface; + __le16 num_mcaddrs; + __u8 perm_addr[ETH_ALEN]; + __le16 region_code; + __le32 fw_rev; + __le32 ps_cookie; + __le32 caps; + __le32 rx_queue_ptr; + __le32 num_tx_queues; + __le32 tx_queue_ptrs[MWL8K_MAX_TX_QUEUES]; + __le32 flags; + __le32 num_tx_desc_per_queue; + __le32 total_rxd; +} __packed; + +/* If enabled, MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY will cause + * packets to expire 500 ms after the timestamp in the tx descriptor. That is, + * the packets that are queued for more than 500ms, will be dropped in the + * hardware. This helps minimizing the issues caused due to head-of-line + * blocking where a slow client can hog the bandwidth and affect traffic to a + * faster client. + */ +#define MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY 0x00000400 +#define MWL8K_SET_HW_SPEC_FLAG_GENERATE_CCMP_HDR 0x00000200 +#define MWL8K_SET_HW_SPEC_FLAG_HOST_DECR_MGMT 0x00000080 +#define MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_PROBERESP 0x00000020 +#define MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_BEACON 0x00000010 + +static int mwl8k_cmd_set_hw_spec(struct ieee80211_hw *hw) +{ + struct mwl8k_priv *priv = hw->priv; + struct mwl8k_cmd_set_hw_spec *cmd; + int rc; + int i; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_HW_SPEC); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + + cmd->ps_cookie = cpu_to_le32(priv->cookie_dma); + cmd->rx_queue_ptr = cpu_to_le32(priv->rxq[0].rxd_dma); + cmd->num_tx_queues = cpu_to_le32(mwl8k_tx_queues(priv)); + + /* + * Mac80211 stack has Q0 as highest priority and Q3 as lowest in + * that order. Firmware has Q3 as highest priority and Q0 as lowest + * in that order. Map Q3 of mac80211 to Q0 of firmware so that the + * priority is interpreted the right way in firmware. + */ + for (i = 0; i < mwl8k_tx_queues(priv); i++) { + int j = mwl8k_tx_queues(priv) - 1 - i; + cmd->tx_queue_ptrs[i] = cpu_to_le32(priv->txq[j].txd_dma); + } + + cmd->flags = cpu_to_le32(MWL8K_SET_HW_SPEC_FLAG_HOST_DECR_MGMT | + MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_PROBERESP | + MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_BEACON | + MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY | + MWL8K_SET_HW_SPEC_FLAG_GENERATE_CCMP_HDR); + cmd->num_tx_desc_per_queue = cpu_to_le32(MWL8K_TX_DESCS); + cmd->total_rxd = cpu_to_le32(MWL8K_RX_DESCS); + + rc = mwl8k_post_cmd(hw, &cmd->header); + kfree(cmd); + + return rc; +} + +/* + * CMD_MAC_MULTICAST_ADR. + */ +struct mwl8k_cmd_mac_multicast_adr { + struct mwl8k_cmd_pkt header; + __le16 action; + __le16 numaddr; + __u8 addr[0][ETH_ALEN]; +}; + +#define MWL8K_ENABLE_RX_DIRECTED 0x0001 +#define MWL8K_ENABLE_RX_MULTICAST 0x0002 +#define MWL8K_ENABLE_RX_ALL_MULTICAST 0x0004 +#define MWL8K_ENABLE_RX_BROADCAST 0x0008 + +static struct mwl8k_cmd_pkt * +__mwl8k_cmd_mac_multicast_adr(struct ieee80211_hw *hw, int allmulti, + struct netdev_hw_addr_list *mc_list) +{ + struct mwl8k_priv *priv = hw->priv; + struct mwl8k_cmd_mac_multicast_adr *cmd; + int size; + int mc_count = 0; + + if (mc_list) + mc_count = netdev_hw_addr_list_count(mc_list); + + if (allmulti || mc_count > priv->num_mcaddrs) { + allmulti = 1; + mc_count = 0; + } + + size = sizeof(*cmd) + mc_count * ETH_ALEN; + + cmd = kzalloc(size, GFP_ATOMIC); + if (cmd == NULL) + return NULL; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_MAC_MULTICAST_ADR); + cmd->header.length = cpu_to_le16(size); + cmd->action = cpu_to_le16(MWL8K_ENABLE_RX_DIRECTED | + MWL8K_ENABLE_RX_BROADCAST); + + if (allmulti) { + cmd->action |= cpu_to_le16(MWL8K_ENABLE_RX_ALL_MULTICAST); + } else if (mc_count) { + struct netdev_hw_addr *ha; + int i = 0; + + cmd->action |= cpu_to_le16(MWL8K_ENABLE_RX_MULTICAST); + cmd->numaddr = cpu_to_le16(mc_count); + netdev_hw_addr_list_for_each(ha, mc_list) { + memcpy(cmd->addr[i], ha->addr, ETH_ALEN); + } + } + + return &cmd->header; +} + +/* + * CMD_GET_STAT. + */ +struct mwl8k_cmd_get_stat { + struct mwl8k_cmd_pkt header; + __le32 stats[64]; +} __packed; + +#define MWL8K_STAT_ACK_FAILURE 9 +#define MWL8K_STAT_RTS_FAILURE 12 +#define MWL8K_STAT_FCS_ERROR 24 +#define MWL8K_STAT_RTS_SUCCESS 11 + +static int mwl8k_cmd_get_stat(struct ieee80211_hw *hw, + struct ieee80211_low_level_stats *stats) +{ + struct mwl8k_cmd_get_stat *cmd; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_STAT); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + + rc = mwl8k_post_cmd(hw, &cmd->header); + if (!rc) { + stats->dot11ACKFailureCount = + le32_to_cpu(cmd->stats[MWL8K_STAT_ACK_FAILURE]); + stats->dot11RTSFailureCount = + le32_to_cpu(cmd->stats[MWL8K_STAT_RTS_FAILURE]); + stats->dot11FCSErrorCount = + le32_to_cpu(cmd->stats[MWL8K_STAT_FCS_ERROR]); + stats->dot11RTSSuccessCount = + le32_to_cpu(cmd->stats[MWL8K_STAT_RTS_SUCCESS]); + } + kfree(cmd); + + return rc; +} + +/* + * CMD_RADIO_CONTROL. + */ +struct mwl8k_cmd_radio_control { + struct mwl8k_cmd_pkt header; + __le16 action; + __le16 control; + __le16 radio_on; +} __packed; + +static int +mwl8k_cmd_radio_control(struct ieee80211_hw *hw, bool enable, bool force) +{ + struct mwl8k_priv *priv = hw->priv; + struct mwl8k_cmd_radio_control *cmd; + int rc; + + if (enable == priv->radio_on && !force) + return 0; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_RADIO_CONTROL); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + cmd->action = cpu_to_le16(MWL8K_CMD_SET); + cmd->control = cpu_to_le16(priv->radio_short_preamble ? 3 : 1); + cmd->radio_on = cpu_to_le16(enable ? 0x0001 : 0x0000); + + rc = mwl8k_post_cmd(hw, &cmd->header); + kfree(cmd); + + if (!rc) + priv->radio_on = enable; + + return rc; +} + +static int mwl8k_cmd_radio_disable(struct ieee80211_hw *hw) +{ + return mwl8k_cmd_radio_control(hw, 0, 0); +} + +static int mwl8k_cmd_radio_enable(struct ieee80211_hw *hw) +{ + return mwl8k_cmd_radio_control(hw, 1, 0); +} + +static int +mwl8k_set_radio_preamble(struct ieee80211_hw *hw, bool short_preamble) +{ + struct mwl8k_priv *priv = hw->priv; + + priv->radio_short_preamble = short_preamble; + + return mwl8k_cmd_radio_control(hw, 1, 1); +} + +/* + * CMD_RF_TX_POWER. + */ +#define MWL8K_RF_TX_POWER_LEVEL_TOTAL 8 + +struct mwl8k_cmd_rf_tx_power { + struct mwl8k_cmd_pkt header; + __le16 action; + __le16 support_level; + __le16 current_level; + __le16 reserved; + __le16 power_level_list[MWL8K_RF_TX_POWER_LEVEL_TOTAL]; +} __packed; + +static int mwl8k_cmd_rf_tx_power(struct ieee80211_hw *hw, int dBm) +{ + struct mwl8k_cmd_rf_tx_power *cmd; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_RF_TX_POWER); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + cmd->action = cpu_to_le16(MWL8K_CMD_SET); + cmd->support_level = cpu_to_le16(dBm); + + rc = mwl8k_post_cmd(hw, &cmd->header); + kfree(cmd); + + return rc; +} + +/* + * CMD_TX_POWER. + */ +#define MWL8K_TX_POWER_LEVEL_TOTAL 12 + +struct mwl8k_cmd_tx_power { + struct mwl8k_cmd_pkt header; + __le16 action; + __le16 band; + __le16 channel; + __le16 bw; + __le16 sub_ch; + __le16 power_level_list[MWL8K_TX_POWER_LEVEL_TOTAL]; +} __packed; + +static int mwl8k_cmd_tx_power(struct ieee80211_hw *hw, + struct ieee80211_conf *conf, + unsigned short pwr) +{ + struct ieee80211_channel *channel = conf->chandef.chan; + enum nl80211_channel_type channel_type = + cfg80211_get_chandef_type(&conf->chandef); + struct mwl8k_cmd_tx_power *cmd; + int rc; + int i; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_TX_POWER); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + cmd->action = cpu_to_le16(MWL8K_CMD_SET_LIST); + + if (channel->band == NL80211_BAND_2GHZ) + cmd->band = cpu_to_le16(0x1); + else if (channel->band == NL80211_BAND_5GHZ) + cmd->band = cpu_to_le16(0x4); + + cmd->channel = cpu_to_le16(channel->hw_value); + + if (channel_type == NL80211_CHAN_NO_HT || + channel_type == NL80211_CHAN_HT20) { + cmd->bw = cpu_to_le16(0x2); + } else { + cmd->bw = cpu_to_le16(0x4); + if (channel_type == NL80211_CHAN_HT40MINUS) + cmd->sub_ch = cpu_to_le16(0x3); + else if (channel_type == NL80211_CHAN_HT40PLUS) + cmd->sub_ch = cpu_to_le16(0x1); + } + + for (i = 0; i < MWL8K_TX_POWER_LEVEL_TOTAL; i++) + cmd->power_level_list[i] = cpu_to_le16(pwr); + + rc = mwl8k_post_cmd(hw, &cmd->header); + kfree(cmd); + + return rc; +} + +/* + * CMD_RF_ANTENNA. + */ +struct mwl8k_cmd_rf_antenna { + struct mwl8k_cmd_pkt header; + __le16 antenna; + __le16 mode; +} __packed; + +#define MWL8K_RF_ANTENNA_RX 1 +#define MWL8K_RF_ANTENNA_TX 2 + +static int +mwl8k_cmd_rf_antenna(struct ieee80211_hw *hw, int antenna, int mask) +{ + struct mwl8k_cmd_rf_antenna *cmd; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_RF_ANTENNA); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + cmd->antenna = cpu_to_le16(antenna); + cmd->mode = cpu_to_le16(mask); + + rc = mwl8k_post_cmd(hw, &cmd->header); + kfree(cmd); + + return rc; +} + +/* + * CMD_SET_BEACON. + */ +struct mwl8k_cmd_set_beacon { + struct mwl8k_cmd_pkt header; + __le16 beacon_len; + __u8 beacon[0]; +}; + +static int mwl8k_cmd_set_beacon(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, u8 *beacon, int len) +{ + struct mwl8k_cmd_set_beacon *cmd; + int rc; + + cmd = kzalloc(sizeof(*cmd) + len, GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_BEACON); + cmd->header.length = cpu_to_le16(sizeof(*cmd) + len); + cmd->beacon_len = cpu_to_le16(len); + memcpy(cmd->beacon, beacon, len); + + rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header); + kfree(cmd); + + return rc; +} + +/* + * CMD_SET_PRE_SCAN. + */ +struct mwl8k_cmd_set_pre_scan { + struct mwl8k_cmd_pkt header; +} __packed; + +static int mwl8k_cmd_set_pre_scan(struct ieee80211_hw *hw) +{ + struct mwl8k_cmd_set_pre_scan *cmd; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_PRE_SCAN); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + + rc = mwl8k_post_cmd(hw, &cmd->header); + kfree(cmd); + + return rc; +} + +/* + * CMD_BBP_REG_ACCESS. + */ +struct mwl8k_cmd_bbp_reg_access { + struct mwl8k_cmd_pkt header; + __le16 action; + __le16 offset; + u8 value; + u8 rsrv[3]; +} __packed; + +static int +mwl8k_cmd_bbp_reg_access(struct ieee80211_hw *hw, + u16 action, + u16 offset, + u8 *value) +{ + struct mwl8k_cmd_bbp_reg_access *cmd; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_BBP_REG_ACCESS); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + cmd->action = cpu_to_le16(action); + cmd->offset = cpu_to_le16(offset); + + rc = mwl8k_post_cmd(hw, &cmd->header); + + if (!rc) + *value = cmd->value; + else + *value = 0; + + kfree(cmd); + + return rc; +} + +/* + * CMD_SET_POST_SCAN. + */ +struct mwl8k_cmd_set_post_scan { + struct mwl8k_cmd_pkt header; + __le32 isibss; + __u8 bssid[ETH_ALEN]; +} __packed; + +static int +mwl8k_cmd_set_post_scan(struct ieee80211_hw *hw, const __u8 *mac) +{ + struct mwl8k_cmd_set_post_scan *cmd; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_POST_SCAN); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + cmd->isibss = 0; + memcpy(cmd->bssid, mac, ETH_ALEN); + + rc = mwl8k_post_cmd(hw, &cmd->header); + kfree(cmd); + + return rc; +} + +static int freq_to_idx(struct mwl8k_priv *priv, int freq) +{ + struct ieee80211_supported_band *sband; + int band, ch, idx = 0; + + for (band = NL80211_BAND_2GHZ; band < NUM_NL80211_BANDS; band++) { + sband = priv->hw->wiphy->bands[band]; + if (!sband) + continue; + + for (ch = 0; ch < sband->n_channels; ch++, idx++) + if (sband->channels[ch].center_freq == freq) + goto exit; + } + +exit: + return idx; +} + +static void mwl8k_update_survey(struct mwl8k_priv *priv, + struct ieee80211_channel *channel) +{ + u32 cca_cnt, rx_rdy; + s8 nf = 0, idx; + struct survey_info *survey; + + idx = freq_to_idx(priv, priv->acs_chan->center_freq); + if (idx >= MWL8K_NUM_CHANS) { + wiphy_err(priv->hw->wiphy, "Failed to update survey\n"); + return; + } + + survey = &priv->survey[idx]; + + cca_cnt = ioread32(priv->regs + NOK_CCA_CNT_REG); + cca_cnt /= 1000; /* uSecs to mSecs */ + survey->time_busy = (u64) cca_cnt; + + rx_rdy = ioread32(priv->regs + BBU_RXRDY_CNT_REG); + rx_rdy /= 1000; /* uSecs to mSecs */ + survey->time_rx = (u64) rx_rdy; + + priv->channel_time = jiffies - priv->channel_time; + survey->time = jiffies_to_msecs(priv->channel_time); + + survey->channel = channel; + + mwl8k_cmd_bbp_reg_access(priv->hw, 0, BBU_AVG_NOISE_VAL, &nf); + + /* Make sure sign is negative else ACS at hostapd fails */ + survey->noise = nf * -1; + + survey->filled = SURVEY_INFO_NOISE_DBM | + SURVEY_INFO_TIME | + SURVEY_INFO_TIME_BUSY | + SURVEY_INFO_TIME_RX; +} + +/* + * CMD_SET_RF_CHANNEL. + */ +struct mwl8k_cmd_set_rf_channel { + struct mwl8k_cmd_pkt header; + __le16 action; + __u8 current_channel; + __le32 channel_flags; +} __packed; + +static int mwl8k_cmd_set_rf_channel(struct ieee80211_hw *hw, + struct ieee80211_conf *conf) +{ + struct ieee80211_channel *channel = conf->chandef.chan; + enum nl80211_channel_type channel_type = + cfg80211_get_chandef_type(&conf->chandef); + struct mwl8k_cmd_set_rf_channel *cmd; + struct mwl8k_priv *priv = hw->priv; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RF_CHANNEL); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + cmd->action = cpu_to_le16(MWL8K_CMD_SET); + cmd->current_channel = channel->hw_value; + + if (channel->band == NL80211_BAND_2GHZ) + cmd->channel_flags |= cpu_to_le32(0x00000001); + else if (channel->band == NL80211_BAND_5GHZ) + cmd->channel_flags |= cpu_to_le32(0x00000004); + + if (!priv->sw_scan_start) { + if (channel_type == NL80211_CHAN_NO_HT || + channel_type == NL80211_CHAN_HT20) + cmd->channel_flags |= cpu_to_le32(0x00000080); + else if (channel_type == NL80211_CHAN_HT40MINUS) + cmd->channel_flags |= cpu_to_le32(0x000001900); + else if (channel_type == NL80211_CHAN_HT40PLUS) + cmd->channel_flags |= cpu_to_le32(0x000000900); + } else { + cmd->channel_flags |= cpu_to_le32(0x00000080); + } + + if (priv->sw_scan_start) { + /* Store current channel stats + * before switching to newer one. + * This will be processed only for AP fw. + */ + if (priv->channel_time != 0) + mwl8k_update_survey(priv, priv->acs_chan); + + priv->channel_time = jiffies; + priv->acs_chan = channel; + } + + rc = mwl8k_post_cmd(hw, &cmd->header); + kfree(cmd); + + return rc; +} + +/* + * CMD_SET_AID. + */ +#define MWL8K_FRAME_PROT_DISABLED 0x00 +#define MWL8K_FRAME_PROT_11G 0x07 +#define MWL8K_FRAME_PROT_11N_HT_40MHZ_ONLY 0x02 +#define MWL8K_FRAME_PROT_11N_HT_ALL 0x06 + +struct mwl8k_cmd_update_set_aid { + struct mwl8k_cmd_pkt header; + __le16 aid; + + /* AP's MAC address (BSSID) */ + __u8 bssid[ETH_ALEN]; + __le16 protection_mode; + __u8 supp_rates[14]; +} __packed; + +static void legacy_rate_mask_to_array(u8 *rates, u32 mask) +{ + int i; + int j; + + /* + * Clear nonstandard rate 4. + */ + mask &= 0x1fef; + + for (i = 0, j = 0; i < 13; i++) { + if (mask & (1 << i)) + rates[j++] = mwl8k_rates_24[i].hw_value; + } +} + +static int +mwl8k_cmd_set_aid(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, u32 legacy_rate_mask) +{ + struct mwl8k_cmd_update_set_aid *cmd; + u16 prot_mode; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_AID); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + cmd->aid = cpu_to_le16(vif->bss_conf.aid); + memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN); + + if (vif->bss_conf.use_cts_prot) { + prot_mode = MWL8K_FRAME_PROT_11G; + } else { + switch (vif->bss_conf.ht_operation_mode & + IEEE80211_HT_OP_MODE_PROTECTION) { + case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ: + prot_mode = MWL8K_FRAME_PROT_11N_HT_40MHZ_ONLY; + break; + case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED: + prot_mode = MWL8K_FRAME_PROT_11N_HT_ALL; + break; + default: + prot_mode = MWL8K_FRAME_PROT_DISABLED; + break; + } + } + cmd->protection_mode = cpu_to_le16(prot_mode); + + legacy_rate_mask_to_array(cmd->supp_rates, legacy_rate_mask); + + rc = mwl8k_post_cmd(hw, &cmd->header); + kfree(cmd); + + return rc; +} + +/* + * CMD_SET_RATE. + */ +struct mwl8k_cmd_set_rate { + struct mwl8k_cmd_pkt header; + __u8 legacy_rates[14]; + + /* Bitmap for supported MCS codes. */ + __u8 mcs_set[16]; + __u8 reserved[16]; +} __packed; + +static int +mwl8k_cmd_set_rate(struct ieee80211_hw *hw, struct ieee80211_vif *vif, + u32 legacy_rate_mask, u8 *mcs_rates) +{ + struct mwl8k_cmd_set_rate *cmd; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RATE); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + legacy_rate_mask_to_array(cmd->legacy_rates, legacy_rate_mask); + memcpy(cmd->mcs_set, mcs_rates, 16); + + rc = mwl8k_post_cmd(hw, &cmd->header); + kfree(cmd); + + return rc; +} + +/* + * CMD_FINALIZE_JOIN. + */ +#define MWL8K_FJ_BEACON_MAXLEN 128 + +struct mwl8k_cmd_finalize_join { + struct mwl8k_cmd_pkt header; + __le32 sleep_interval; /* Number of beacon periods to sleep */ + __u8 beacon_data[MWL8K_FJ_BEACON_MAXLEN]; +} __packed; + +static int mwl8k_cmd_finalize_join(struct ieee80211_hw *hw, void *frame, + int framelen, int dtim) +{ + struct mwl8k_cmd_finalize_join *cmd; + struct ieee80211_mgmt *payload = frame; + int payload_len; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_FINALIZE_JOIN); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + cmd->sleep_interval = cpu_to_le32(dtim ? dtim : 1); + + payload_len = framelen - ieee80211_hdrlen(payload->frame_control); + if (payload_len < 0) + payload_len = 0; + else if (payload_len > MWL8K_FJ_BEACON_MAXLEN) + payload_len = MWL8K_FJ_BEACON_MAXLEN; + + memcpy(cmd->beacon_data, &payload->u.beacon, payload_len); + + rc = mwl8k_post_cmd(hw, &cmd->header); + kfree(cmd); + + return rc; +} + +/* + * CMD_SET_RTS_THRESHOLD. + */ +struct mwl8k_cmd_set_rts_threshold { + struct mwl8k_cmd_pkt header; + __le16 action; + __le16 threshold; +} __packed; + +static int +mwl8k_cmd_set_rts_threshold(struct ieee80211_hw *hw, int rts_thresh) +{ + struct mwl8k_cmd_set_rts_threshold *cmd; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_RTS_THRESHOLD); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + cmd->action = cpu_to_le16(MWL8K_CMD_SET); + cmd->threshold = cpu_to_le16(rts_thresh); + + rc = mwl8k_post_cmd(hw, &cmd->header); + kfree(cmd); + + return rc; +} + +/* + * CMD_SET_SLOT. + */ +struct mwl8k_cmd_set_slot { + struct mwl8k_cmd_pkt header; + __le16 action; + __u8 short_slot; +} __packed; + +static int mwl8k_cmd_set_slot(struct ieee80211_hw *hw, bool short_slot_time) +{ + struct mwl8k_cmd_set_slot *cmd; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_SLOT); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + cmd->action = cpu_to_le16(MWL8K_CMD_SET); + cmd->short_slot = short_slot_time; + + rc = mwl8k_post_cmd(hw, &cmd->header); + kfree(cmd); + + return rc; +} + +/* + * CMD_SET_EDCA_PARAMS. + */ +struct mwl8k_cmd_set_edca_params { + struct mwl8k_cmd_pkt header; + + /* See MWL8K_SET_EDCA_XXX below */ + __le16 action; + + /* TX opportunity in units of 32 us */ + __le16 txop; + + union { + struct { + /* Log exponent of max contention period: 0...15 */ + __le32 log_cw_max; + + /* Log exponent of min contention period: 0...15 */ + __le32 log_cw_min; + + /* Adaptive interframe spacing in units of 32us */ + __u8 aifs; + + /* TX queue to configure */ + __u8 txq; + } ap; + struct { + /* Log exponent of max contention period: 0...15 */ + __u8 log_cw_max; + + /* Log exponent of min contention period: 0...15 */ + __u8 log_cw_min; + + /* Adaptive interframe spacing in units of 32us */ + __u8 aifs; + + /* TX queue to configure */ + __u8 txq; + } sta; + }; +} __packed; + +#define MWL8K_SET_EDCA_CW 0x01 +#define MWL8K_SET_EDCA_TXOP 0x02 +#define MWL8K_SET_EDCA_AIFS 0x04 + +#define MWL8K_SET_EDCA_ALL (MWL8K_SET_EDCA_CW | \ + MWL8K_SET_EDCA_TXOP | \ + MWL8K_SET_EDCA_AIFS) + +static int +mwl8k_cmd_set_edca_params(struct ieee80211_hw *hw, __u8 qnum, + __u16 cw_min, __u16 cw_max, + __u8 aifs, __u16 txop) +{ + struct mwl8k_priv *priv = hw->priv; + struct mwl8k_cmd_set_edca_params *cmd; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_EDCA_PARAMS); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + cmd->action = cpu_to_le16(MWL8K_SET_EDCA_ALL); + cmd->txop = cpu_to_le16(txop); + if (priv->ap_fw) { + cmd->ap.log_cw_max = cpu_to_le32(ilog2(cw_max + 1)); + cmd->ap.log_cw_min = cpu_to_le32(ilog2(cw_min + 1)); + cmd->ap.aifs = aifs; + cmd->ap.txq = qnum; + } else { + cmd->sta.log_cw_max = (u8)ilog2(cw_max + 1); + cmd->sta.log_cw_min = (u8)ilog2(cw_min + 1); + cmd->sta.aifs = aifs; + cmd->sta.txq = qnum; + } + + rc = mwl8k_post_cmd(hw, &cmd->header); + kfree(cmd); + + return rc; +} + +/* + * CMD_SET_WMM_MODE. + */ +struct mwl8k_cmd_set_wmm_mode { + struct mwl8k_cmd_pkt header; + __le16 action; +} __packed; + +static int mwl8k_cmd_set_wmm_mode(struct ieee80211_hw *hw, bool enable) +{ + struct mwl8k_priv *priv = hw->priv; + struct mwl8k_cmd_set_wmm_mode *cmd; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_WMM_MODE); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + cmd->action = cpu_to_le16(!!enable); + + rc = mwl8k_post_cmd(hw, &cmd->header); + kfree(cmd); + + if (!rc) + priv->wmm_enabled = enable; + + return rc; +} + +/* + * CMD_MIMO_CONFIG. + */ +struct mwl8k_cmd_mimo_config { + struct mwl8k_cmd_pkt header; + __le32 action; + __u8 rx_antenna_map; + __u8 tx_antenna_map; +} __packed; + +static int mwl8k_cmd_mimo_config(struct ieee80211_hw *hw, __u8 rx, __u8 tx) +{ + struct mwl8k_cmd_mimo_config *cmd; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_MIMO_CONFIG); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + cmd->action = cpu_to_le32((u32)MWL8K_CMD_SET); + cmd->rx_antenna_map = rx; + cmd->tx_antenna_map = tx; + + rc = mwl8k_post_cmd(hw, &cmd->header); + kfree(cmd); + + return rc; +} + +/* + * CMD_USE_FIXED_RATE (STA version). + */ +struct mwl8k_cmd_use_fixed_rate_sta { + struct mwl8k_cmd_pkt header; + __le32 action; + __le32 allow_rate_drop; + __le32 num_rates; + struct { + __le32 is_ht_rate; + __le32 enable_retry; + __le32 rate; + __le32 retry_count; + } rate_entry[8]; + __le32 rate_type; + __le32 reserved1; + __le32 reserved2; +} __packed; + +#define MWL8K_USE_AUTO_RATE 0x0002 +#define MWL8K_UCAST_RATE 0 + +static int mwl8k_cmd_use_fixed_rate_sta(struct ieee80211_hw *hw) +{ + struct mwl8k_cmd_use_fixed_rate_sta *cmd; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_USE_FIXED_RATE); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + cmd->action = cpu_to_le32(MWL8K_USE_AUTO_RATE); + cmd->rate_type = cpu_to_le32(MWL8K_UCAST_RATE); + + rc = mwl8k_post_cmd(hw, &cmd->header); + kfree(cmd); + + return rc; +} + +/* + * CMD_USE_FIXED_RATE (AP version). + */ +struct mwl8k_cmd_use_fixed_rate_ap { + struct mwl8k_cmd_pkt header; + __le32 action; + __le32 allow_rate_drop; + __le32 num_rates; + struct mwl8k_rate_entry_ap { + __le32 is_ht_rate; + __le32 enable_retry; + __le32 rate; + __le32 retry_count; + } rate_entry[4]; + u8 multicast_rate; + u8 multicast_rate_type; + u8 management_rate; +} __packed; + +static int +mwl8k_cmd_use_fixed_rate_ap(struct ieee80211_hw *hw, int mcast, int mgmt) +{ + struct mwl8k_cmd_use_fixed_rate_ap *cmd; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_USE_FIXED_RATE); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + cmd->action = cpu_to_le32(MWL8K_USE_AUTO_RATE); + cmd->multicast_rate = mcast; + cmd->management_rate = mgmt; + + rc = mwl8k_post_cmd(hw, &cmd->header); + kfree(cmd); + + return rc; +} + +/* + * CMD_ENABLE_SNIFFER. + */ +struct mwl8k_cmd_enable_sniffer { + struct mwl8k_cmd_pkt header; + __le32 action; +} __packed; + +static int mwl8k_cmd_enable_sniffer(struct ieee80211_hw *hw, bool enable) +{ + struct mwl8k_cmd_enable_sniffer *cmd; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_ENABLE_SNIFFER); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + cmd->action = cpu_to_le32(!!enable); + + rc = mwl8k_post_cmd(hw, &cmd->header); + kfree(cmd); + + return rc; +} + +struct mwl8k_cmd_update_mac_addr { + struct mwl8k_cmd_pkt header; + union { + struct { + __le16 mac_type; + __u8 mac_addr[ETH_ALEN]; + } mbss; + __u8 mac_addr[ETH_ALEN]; + }; +} __packed; + +#define MWL8K_MAC_TYPE_PRIMARY_CLIENT 0 +#define MWL8K_MAC_TYPE_SECONDARY_CLIENT 1 +#define MWL8K_MAC_TYPE_PRIMARY_AP 2 +#define MWL8K_MAC_TYPE_SECONDARY_AP 3 + +static int mwl8k_cmd_update_mac_addr(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, u8 *mac, bool set) +{ + struct mwl8k_priv *priv = hw->priv; + struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif); + struct mwl8k_cmd_update_mac_addr *cmd; + int mac_type; + int rc; + + mac_type = MWL8K_MAC_TYPE_PRIMARY_AP; + if (vif != NULL && vif->type == NL80211_IFTYPE_STATION) { + if (mwl8k_vif->macid + 1 == ffs(priv->sta_macids_supported)) + if (priv->ap_fw) + mac_type = MWL8K_MAC_TYPE_SECONDARY_CLIENT; + else + mac_type = MWL8K_MAC_TYPE_PRIMARY_CLIENT; + else + mac_type = MWL8K_MAC_TYPE_SECONDARY_CLIENT; + } else if (vif != NULL && vif->type == NL80211_IFTYPE_AP) { + if (mwl8k_vif->macid + 1 == ffs(priv->ap_macids_supported)) + mac_type = MWL8K_MAC_TYPE_PRIMARY_AP; + else + mac_type = MWL8K_MAC_TYPE_SECONDARY_AP; + } + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + if (set) + cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_MAC_ADDR); + else + cmd->header.code = cpu_to_le16(MWL8K_CMD_DEL_MAC_ADDR); + + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + if (priv->ap_fw) { + cmd->mbss.mac_type = cpu_to_le16(mac_type); + memcpy(cmd->mbss.mac_addr, mac, ETH_ALEN); + } else { + memcpy(cmd->mac_addr, mac, ETH_ALEN); + } + + rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header); + kfree(cmd); + + return rc; +} + +/* + * MWL8K_CMD_SET_MAC_ADDR. + */ +static inline int mwl8k_cmd_set_mac_addr(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, u8 *mac) +{ + return mwl8k_cmd_update_mac_addr(hw, vif, mac, true); +} + +/* + * MWL8K_CMD_DEL_MAC_ADDR. + */ +static inline int mwl8k_cmd_del_mac_addr(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, u8 *mac) +{ + return mwl8k_cmd_update_mac_addr(hw, vif, mac, false); +} + +/* + * CMD_SET_RATEADAPT_MODE. + */ +struct mwl8k_cmd_set_rate_adapt_mode { + struct mwl8k_cmd_pkt header; + __le16 action; + __le16 mode; +} __packed; + +static int mwl8k_cmd_set_rateadapt_mode(struct ieee80211_hw *hw, __u16 mode) +{ + struct mwl8k_cmd_set_rate_adapt_mode *cmd; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RATEADAPT_MODE); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + cmd->action = cpu_to_le16(MWL8K_CMD_SET); + cmd->mode = cpu_to_le16(mode); + + rc = mwl8k_post_cmd(hw, &cmd->header); + kfree(cmd); + + return rc; +} + +/* + * CMD_GET_WATCHDOG_BITMAP. + */ +struct mwl8k_cmd_get_watchdog_bitmap { + struct mwl8k_cmd_pkt header; + u8 bitmap; +} __packed; + +static int mwl8k_cmd_get_watchdog_bitmap(struct ieee80211_hw *hw, u8 *bitmap) +{ + struct mwl8k_cmd_get_watchdog_bitmap *cmd; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_WATCHDOG_BITMAP); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + + rc = mwl8k_post_cmd(hw, &cmd->header); + if (!rc) + *bitmap = cmd->bitmap; + + kfree(cmd); + + return rc; +} + +#define MWL8K_WMM_QUEUE_NUMBER 3 + +static void mwl8k_destroy_ba(struct ieee80211_hw *hw, + u8 idx); + +static void mwl8k_watchdog_ba_events(struct work_struct *work) +{ + int rc; + u8 bitmap = 0, stream_index; + struct mwl8k_ampdu_stream *streams; + struct mwl8k_priv *priv = + container_of(work, struct mwl8k_priv, watchdog_ba_handle); + struct ieee80211_hw *hw = priv->hw; + int i; + u32 status = 0; + + mwl8k_fw_lock(hw); + + rc = mwl8k_cmd_get_watchdog_bitmap(priv->hw, &bitmap); + if (rc) + goto done; + + spin_lock(&priv->stream_lock); + + /* the bitmap is the hw queue number. Map it to the ampdu queue. */ + for (i = 0; i < TOTAL_HW_TX_QUEUES; i++) { + if (bitmap & (1 << i)) { + stream_index = (i + MWL8K_WMM_QUEUE_NUMBER) % + TOTAL_HW_TX_QUEUES; + streams = &priv->ampdu[stream_index]; + if (streams->state == AMPDU_STREAM_ACTIVE) { + ieee80211_stop_tx_ba_session(streams->sta, + streams->tid); + spin_unlock(&priv->stream_lock); + mwl8k_destroy_ba(hw, stream_index); + spin_lock(&priv->stream_lock); + } + } + } + + spin_unlock(&priv->stream_lock); +done: + atomic_dec(&priv->watchdog_event_pending); + status = ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK); + iowrite32((status | MWL8K_A2H_INT_BA_WATCHDOG), + priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK); + mwl8k_fw_unlock(hw); + return; +} + + +/* + * CMD_BSS_START. + */ +struct mwl8k_cmd_bss_start { + struct mwl8k_cmd_pkt header; + __le32 enable; +} __packed; + +static int mwl8k_cmd_bss_start(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, int enable) +{ + struct mwl8k_cmd_bss_start *cmd; + struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif); + struct mwl8k_priv *priv = hw->priv; + int rc; + + if (enable && (priv->running_bsses & (1 << mwl8k_vif->macid))) + return 0; + + if (!enable && !(priv->running_bsses & (1 << mwl8k_vif->macid))) + return 0; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_BSS_START); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + cmd->enable = cpu_to_le32(enable); + + rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header); + kfree(cmd); + + if (!rc) { + if (enable) + priv->running_bsses |= (1 << mwl8k_vif->macid); + else + priv->running_bsses &= ~(1 << mwl8k_vif->macid); + } + return rc; +} + +static void mwl8k_enable_bsses(struct ieee80211_hw *hw, bool enable, u32 bitmap) +{ + struct mwl8k_priv *priv = hw->priv; + struct mwl8k_vif *mwl8k_vif, *tmp_vif; + struct ieee80211_vif *vif; + + list_for_each_entry_safe(mwl8k_vif, tmp_vif, &priv->vif_list, list) { + vif = mwl8k_vif->vif; + + if (!(bitmap & (1 << mwl8k_vif->macid))) + continue; + + if (vif->type == NL80211_IFTYPE_AP) + mwl8k_cmd_bss_start(hw, vif, enable); + } +} +/* + * CMD_BASTREAM. + */ + +/* + * UPSTREAM is tx direction + */ +#define BASTREAM_FLAG_DIRECTION_UPSTREAM 0x00 +#define BASTREAM_FLAG_IMMEDIATE_TYPE 0x01 + +enum ba_stream_action_type { + MWL8K_BA_CREATE, + MWL8K_BA_UPDATE, + MWL8K_BA_DESTROY, + MWL8K_BA_FLUSH, + MWL8K_BA_CHECK, +}; + + +struct mwl8k_create_ba_stream { + __le32 flags; + __le32 idle_thrs; + __le32 bar_thrs; + __le32 window_size; + u8 peer_mac_addr[6]; + u8 dialog_token; + u8 tid; + u8 queue_id; + u8 param_info; + __le32 ba_context; + u8 reset_seq_no_flag; + __le16 curr_seq_no; + u8 sta_src_mac_addr[6]; +} __packed; + +struct mwl8k_destroy_ba_stream { + __le32 flags; + __le32 ba_context; +} __packed; + +struct mwl8k_cmd_bastream { + struct mwl8k_cmd_pkt header; + __le32 action; + union { + struct mwl8k_create_ba_stream create_params; + struct mwl8k_destroy_ba_stream destroy_params; + }; +} __packed; + +static int +mwl8k_check_ba(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream, + struct ieee80211_vif *vif) +{ + struct mwl8k_cmd_bastream *cmd; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + + cmd->action = cpu_to_le32(MWL8K_BA_CHECK); + + cmd->create_params.queue_id = stream->idx; + memcpy(&cmd->create_params.peer_mac_addr[0], stream->sta->addr, + ETH_ALEN); + cmd->create_params.tid = stream->tid; + + cmd->create_params.flags = + cpu_to_le32(BASTREAM_FLAG_IMMEDIATE_TYPE) | + cpu_to_le32(BASTREAM_FLAG_DIRECTION_UPSTREAM); + + rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header); + + kfree(cmd); + + return rc; +} + +static int +mwl8k_create_ba(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream, + u8 buf_size, struct ieee80211_vif *vif) +{ + struct mwl8k_cmd_bastream *cmd; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + + cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + + cmd->action = cpu_to_le32(MWL8K_BA_CREATE); + + cmd->create_params.bar_thrs = cpu_to_le32((u32)buf_size); + cmd->create_params.window_size = cpu_to_le32((u32)buf_size); + cmd->create_params.queue_id = stream->idx; + + memcpy(cmd->create_params.peer_mac_addr, stream->sta->addr, ETH_ALEN); + cmd->create_params.tid = stream->tid; + cmd->create_params.curr_seq_no = cpu_to_le16(0); + cmd->create_params.reset_seq_no_flag = 1; + + cmd->create_params.param_info = + (stream->sta->ht_cap.ampdu_factor & + IEEE80211_HT_AMPDU_PARM_FACTOR) | + ((stream->sta->ht_cap.ampdu_density << 2) & + IEEE80211_HT_AMPDU_PARM_DENSITY); + + cmd->create_params.flags = + cpu_to_le32(BASTREAM_FLAG_IMMEDIATE_TYPE | + BASTREAM_FLAG_DIRECTION_UPSTREAM); + + rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header); + + wiphy_debug(hw->wiphy, "Created a BA stream for %pM : tid %d\n", + stream->sta->addr, stream->tid); + kfree(cmd); + + return rc; +} + +static void mwl8k_destroy_ba(struct ieee80211_hw *hw, + u8 idx) +{ + struct mwl8k_cmd_bastream *cmd; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + cmd->action = cpu_to_le32(MWL8K_BA_DESTROY); + + cmd->destroy_params.ba_context = cpu_to_le32(idx); + mwl8k_post_cmd(hw, &cmd->header); + + wiphy_debug(hw->wiphy, "Deleted BA stream index %d\n", idx); + + kfree(cmd); +} + +/* + * CMD_SET_NEW_STN. + */ +struct mwl8k_cmd_set_new_stn { + struct mwl8k_cmd_pkt header; + __le16 aid; + __u8 mac_addr[6]; + __le16 stn_id; + __le16 action; + __le16 rsvd; + __le32 legacy_rates; + __u8 ht_rates[4]; + __le16 cap_info; + __le16 ht_capabilities_info; + __u8 mac_ht_param_info; + __u8 rev; + __u8 control_channel; + __u8 add_channel; + __le16 op_mode; + __le16 stbc; + __u8 add_qos_info; + __u8 is_qos_sta; + __le32 fw_sta_ptr; +} __packed; + +#define MWL8K_STA_ACTION_ADD 0 +#define MWL8K_STA_ACTION_REMOVE 2 + +static int mwl8k_cmd_set_new_stn_add(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + struct ieee80211_sta *sta) +{ + struct mwl8k_cmd_set_new_stn *cmd; + u32 rates; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + cmd->aid = cpu_to_le16(sta->aid); + memcpy(cmd->mac_addr, sta->addr, ETH_ALEN); + cmd->stn_id = cpu_to_le16(sta->aid); + cmd->action = cpu_to_le16(MWL8K_STA_ACTION_ADD); + if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ) + rates = sta->supp_rates[NL80211_BAND_2GHZ]; + else + rates = sta->supp_rates[NL80211_BAND_5GHZ] << 5; + cmd->legacy_rates = cpu_to_le32(rates); + if (sta->ht_cap.ht_supported) { + cmd->ht_rates[0] = sta->ht_cap.mcs.rx_mask[0]; + cmd->ht_rates[1] = sta->ht_cap.mcs.rx_mask[1]; + cmd->ht_rates[2] = sta->ht_cap.mcs.rx_mask[2]; + cmd->ht_rates[3] = sta->ht_cap.mcs.rx_mask[3]; + cmd->ht_capabilities_info = cpu_to_le16(sta->ht_cap.cap); + cmd->mac_ht_param_info = (sta->ht_cap.ampdu_factor & 3) | + ((sta->ht_cap.ampdu_density & 7) << 2); + cmd->is_qos_sta = 1; + } + + rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header); + kfree(cmd); + + return rc; +} + +static int mwl8k_cmd_set_new_stn_add_self(struct ieee80211_hw *hw, + struct ieee80211_vif *vif) +{ + struct mwl8k_cmd_set_new_stn *cmd; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + memcpy(cmd->mac_addr, vif->addr, ETH_ALEN); + + rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header); + kfree(cmd); + + return rc; +} + +static int mwl8k_cmd_set_new_stn_del(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, u8 *addr) +{ + struct mwl8k_cmd_set_new_stn *cmd; + struct mwl8k_priv *priv = hw->priv; + int rc, i; + u8 idx; + + spin_lock(&priv->stream_lock); + /* Destroy any active ampdu streams for this sta */ + for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) { + struct mwl8k_ampdu_stream *s; + s = &priv->ampdu[i]; + if (s->state != AMPDU_NO_STREAM) { + if (memcmp(s->sta->addr, addr, ETH_ALEN) == 0) { + if (s->state == AMPDU_STREAM_ACTIVE) { + idx = s->idx; + spin_unlock(&priv->stream_lock); + mwl8k_destroy_ba(hw, idx); + spin_lock(&priv->stream_lock); + } else if (s->state == AMPDU_STREAM_NEW) { + mwl8k_remove_stream(hw, s); + } + } + } + } + + spin_unlock(&priv->stream_lock); + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + memcpy(cmd->mac_addr, addr, ETH_ALEN); + cmd->action = cpu_to_le16(MWL8K_STA_ACTION_REMOVE); + + rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header); + kfree(cmd); + + return rc; +} + +/* + * CMD_UPDATE_ENCRYPTION. + */ + +#define MAX_ENCR_KEY_LENGTH 16 +#define MIC_KEY_LENGTH 8 + +struct mwl8k_cmd_update_encryption { + struct mwl8k_cmd_pkt header; + + __le32 action; + __le32 reserved; + __u8 mac_addr[6]; + __u8 encr_type; + +} __packed; + +struct mwl8k_cmd_set_key { + struct mwl8k_cmd_pkt header; + + __le32 action; + __le32 reserved; + __le16 length; + __le16 key_type_id; + __le32 key_info; + __le32 key_id; + __le16 key_len; + __u8 key_material[MAX_ENCR_KEY_LENGTH]; + __u8 tkip_tx_mic_key[MIC_KEY_LENGTH]; + __u8 tkip_rx_mic_key[MIC_KEY_LENGTH]; + __le16 tkip_rsc_low; + __le32 tkip_rsc_high; + __le16 tkip_tsc_low; + __le32 tkip_tsc_high; + __u8 mac_addr[6]; +} __packed; + +enum { + MWL8K_ENCR_ENABLE, + MWL8K_ENCR_SET_KEY, + MWL8K_ENCR_REMOVE_KEY, + MWL8K_ENCR_SET_GROUP_KEY, +}; + +#define MWL8K_UPDATE_ENCRYPTION_TYPE_WEP 0 +#define MWL8K_UPDATE_ENCRYPTION_TYPE_DISABLE 1 +#define MWL8K_UPDATE_ENCRYPTION_TYPE_TKIP 4 +#define MWL8K_UPDATE_ENCRYPTION_TYPE_MIXED 7 +#define MWL8K_UPDATE_ENCRYPTION_TYPE_AES 8 + +enum { + MWL8K_ALG_WEP, + MWL8K_ALG_TKIP, + MWL8K_ALG_CCMP, +}; + +#define MWL8K_KEY_FLAG_TXGROUPKEY 0x00000004 +#define MWL8K_KEY_FLAG_PAIRWISE 0x00000008 +#define MWL8K_KEY_FLAG_TSC_VALID 0x00000040 +#define MWL8K_KEY_FLAG_WEP_TXKEY 0x01000000 +#define MWL8K_KEY_FLAG_MICKEY_VALID 0x02000000 + +static int mwl8k_cmd_update_encryption_enable(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + u8 *addr, + u8 encr_type) +{ + struct mwl8k_cmd_update_encryption *cmd; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_ENCRYPTION); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + cmd->action = cpu_to_le32(MWL8K_ENCR_ENABLE); + memcpy(cmd->mac_addr, addr, ETH_ALEN); + cmd->encr_type = encr_type; + + rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header); + kfree(cmd); + + return rc; +} + +static int mwl8k_encryption_set_cmd_info(struct mwl8k_cmd_set_key *cmd, + u8 *addr, + struct ieee80211_key_conf *key) +{ + cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_ENCRYPTION); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + cmd->length = cpu_to_le16(sizeof(*cmd) - + offsetof(struct mwl8k_cmd_set_key, length)); + cmd->key_id = cpu_to_le32(key->keyidx); + cmd->key_len = cpu_to_le16(key->keylen); + memcpy(cmd->mac_addr, addr, ETH_ALEN); + + switch (key->cipher) { + case WLAN_CIPHER_SUITE_WEP40: + case WLAN_CIPHER_SUITE_WEP104: + cmd->key_type_id = cpu_to_le16(MWL8K_ALG_WEP); + if (key->keyidx == 0) + cmd->key_info = cpu_to_le32(MWL8K_KEY_FLAG_WEP_TXKEY); + + break; + case WLAN_CIPHER_SUITE_TKIP: + cmd->key_type_id = cpu_to_le16(MWL8K_ALG_TKIP); + cmd->key_info = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) + ? cpu_to_le32(MWL8K_KEY_FLAG_PAIRWISE) + : cpu_to_le32(MWL8K_KEY_FLAG_TXGROUPKEY); + cmd->key_info |= cpu_to_le32(MWL8K_KEY_FLAG_MICKEY_VALID + | MWL8K_KEY_FLAG_TSC_VALID); + break; + case WLAN_CIPHER_SUITE_CCMP: + cmd->key_type_id = cpu_to_le16(MWL8K_ALG_CCMP); + cmd->key_info = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) + ? cpu_to_le32(MWL8K_KEY_FLAG_PAIRWISE) + : cpu_to_le32(MWL8K_KEY_FLAG_TXGROUPKEY); + break; + default: + return -ENOTSUPP; + } + + return 0; +} + +static int mwl8k_cmd_encryption_set_key(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + u8 *addr, + struct ieee80211_key_conf *key) +{ + struct mwl8k_cmd_set_key *cmd; + int rc; + int keymlen; + u32 action; + u8 idx; + struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif); + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + rc = mwl8k_encryption_set_cmd_info(cmd, addr, key); + if (rc < 0) + goto done; + + idx = key->keyidx; + + if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) + action = MWL8K_ENCR_SET_KEY; + else + action = MWL8K_ENCR_SET_GROUP_KEY; + + switch (key->cipher) { + case WLAN_CIPHER_SUITE_WEP40: + case WLAN_CIPHER_SUITE_WEP104: + if (!mwl8k_vif->wep_key_conf[idx].enabled) { + memcpy(mwl8k_vif->wep_key_conf[idx].key, key, + sizeof(*key) + key->keylen); + mwl8k_vif->wep_key_conf[idx].enabled = 1; + } + + keymlen = key->keylen; + action = MWL8K_ENCR_SET_KEY; + break; + case WLAN_CIPHER_SUITE_TKIP: + keymlen = MAX_ENCR_KEY_LENGTH + 2 * MIC_KEY_LENGTH; + break; + case WLAN_CIPHER_SUITE_CCMP: + keymlen = key->keylen; + break; + default: + rc = -ENOTSUPP; + goto done; + } + + memcpy(cmd->key_material, key->key, keymlen); + cmd->action = cpu_to_le32(action); + + rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header); +done: + kfree(cmd); + + return rc; +} + +static int mwl8k_cmd_encryption_remove_key(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + u8 *addr, + struct ieee80211_key_conf *key) +{ + struct mwl8k_cmd_set_key *cmd; + int rc; + struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif); + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + rc = mwl8k_encryption_set_cmd_info(cmd, addr, key); + if (rc < 0) + goto done; + + if (key->cipher == WLAN_CIPHER_SUITE_WEP40 || + key->cipher == WLAN_CIPHER_SUITE_WEP104) + mwl8k_vif->wep_key_conf[key->keyidx].enabled = 0; + + cmd->action = cpu_to_le32(MWL8K_ENCR_REMOVE_KEY); + + rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header); +done: + kfree(cmd); + + return rc; +} + +static int mwl8k_set_key(struct ieee80211_hw *hw, + enum set_key_cmd cmd_param, + struct ieee80211_vif *vif, + struct ieee80211_sta *sta, + struct ieee80211_key_conf *key) +{ + int rc = 0; + u8 encr_type; + u8 *addr; + struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif); + struct mwl8k_priv *priv = hw->priv; + + if (vif->type == NL80211_IFTYPE_STATION && !priv->ap_fw) + return -EOPNOTSUPP; + + if (sta == NULL) + addr = vif->addr; + else + addr = sta->addr; + + if (cmd_param == SET_KEY) { + rc = mwl8k_cmd_encryption_set_key(hw, vif, addr, key); + if (rc) + goto out; + + if ((key->cipher == WLAN_CIPHER_SUITE_WEP40) + || (key->cipher == WLAN_CIPHER_SUITE_WEP104)) + encr_type = MWL8K_UPDATE_ENCRYPTION_TYPE_WEP; + else + encr_type = MWL8K_UPDATE_ENCRYPTION_TYPE_MIXED; + + rc = mwl8k_cmd_update_encryption_enable(hw, vif, addr, + encr_type); + if (rc) + goto out; + + mwl8k_vif->is_hw_crypto_enabled = true; + + } else { + rc = mwl8k_cmd_encryption_remove_key(hw, vif, addr, key); + + if (rc) + goto out; + } +out: + return rc; +} + +/* + * CMD_UPDATE_STADB. + */ +struct ewc_ht_info { + __le16 control1; + __le16 control2; + __le16 control3; +} __packed; + +struct peer_capability_info { + /* Peer type - AP vs. STA. */ + __u8 peer_type; + + /* Basic 802.11 capabilities from assoc resp. */ + __le16 basic_caps; + + /* Set if peer supports 802.11n high throughput (HT). */ + __u8 ht_support; + + /* Valid if HT is supported. */ + __le16 ht_caps; + __u8 extended_ht_caps; + struct ewc_ht_info ewc_info; + + /* Legacy rate table. Intersection of our rates and peer rates. */ + __u8 legacy_rates[12]; + + /* HT rate table. Intersection of our rates and peer rates. */ + __u8 ht_rates[16]; + __u8 pad[16]; + + /* If set, interoperability mode, no proprietary extensions. */ + __u8 interop; + __u8 pad2; + __u8 station_id; + __le16 amsdu_enabled; +} __packed; + +struct mwl8k_cmd_update_stadb { + struct mwl8k_cmd_pkt header; + + /* See STADB_ACTION_TYPE */ + __le32 action; + + /* Peer MAC address */ + __u8 peer_addr[ETH_ALEN]; + + __le32 reserved; + + /* Peer info - valid during add/update. */ + struct peer_capability_info peer_info; +} __packed; + +#define MWL8K_STA_DB_MODIFY_ENTRY 1 +#define MWL8K_STA_DB_DEL_ENTRY 2 + +/* Peer Entry flags - used to define the type of the peer node */ +#define MWL8K_PEER_TYPE_ACCESSPOINT 2 + +static int mwl8k_cmd_update_stadb_add(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + struct ieee80211_sta *sta) +{ + struct mwl8k_cmd_update_stadb *cmd; + struct peer_capability_info *p; + u32 rates; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_STADB); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + cmd->action = cpu_to_le32(MWL8K_STA_DB_MODIFY_ENTRY); + memcpy(cmd->peer_addr, sta->addr, ETH_ALEN); + + p = &cmd->peer_info; + p->peer_type = MWL8K_PEER_TYPE_ACCESSPOINT; + p->basic_caps = cpu_to_le16(vif->bss_conf.assoc_capability); + p->ht_support = sta->ht_cap.ht_supported; + p->ht_caps = cpu_to_le16(sta->ht_cap.cap); + p->extended_ht_caps = (sta->ht_cap.ampdu_factor & 3) | + ((sta->ht_cap.ampdu_density & 7) << 2); + if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ) + rates = sta->supp_rates[NL80211_BAND_2GHZ]; + else + rates = sta->supp_rates[NL80211_BAND_5GHZ] << 5; + legacy_rate_mask_to_array(p->legacy_rates, rates); + memcpy(p->ht_rates, sta->ht_cap.mcs.rx_mask, 16); + p->interop = 1; + p->amsdu_enabled = 0; + + rc = mwl8k_post_cmd(hw, &cmd->header); + if (!rc) + rc = p->station_id; + kfree(cmd); + + return rc; +} + +static int mwl8k_cmd_update_stadb_del(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, u8 *addr) +{ + struct mwl8k_cmd_update_stadb *cmd; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_STADB); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + cmd->action = cpu_to_le32(MWL8K_STA_DB_DEL_ENTRY); + memcpy(cmd->peer_addr, addr, ETH_ALEN); + + rc = mwl8k_post_cmd(hw, &cmd->header); + kfree(cmd); + + return rc; +} + + +/* + * Interrupt handling. + */ +static irqreturn_t mwl8k_interrupt(int irq, void *dev_id) +{ + struct ieee80211_hw *hw = dev_id; + struct mwl8k_priv *priv = hw->priv; + u32 status; + + status = ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS); + if (!status) + return IRQ_NONE; + + if (status & MWL8K_A2H_INT_TX_DONE) { + status &= ~MWL8K_A2H_INT_TX_DONE; + tasklet_schedule(&priv->poll_tx_task); + } + + if (status & MWL8K_A2H_INT_RX_READY) { + status &= ~MWL8K_A2H_INT_RX_READY; + tasklet_schedule(&priv->poll_rx_task); + } + + if (status & MWL8K_A2H_INT_BA_WATCHDOG) { + iowrite32(~MWL8K_A2H_INT_BA_WATCHDOG, + priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK); + + atomic_inc(&priv->watchdog_event_pending); + status &= ~MWL8K_A2H_INT_BA_WATCHDOG; + ieee80211_queue_work(hw, &priv->watchdog_ba_handle); + } + + if (status) + iowrite32(~status, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS); + + if (status & MWL8K_A2H_INT_OPC_DONE) { + if (priv->hostcmd_wait != NULL) + complete(priv->hostcmd_wait); + } + + if (status & MWL8K_A2H_INT_QUEUE_EMPTY) { + if (!mutex_is_locked(&priv->fw_mutex) && + priv->radio_on && priv->pending_tx_pkts) + mwl8k_tx_start(priv); + } + + return IRQ_HANDLED; +} + +static void mwl8k_tx_poll(unsigned long data) +{ + struct ieee80211_hw *hw = (struct ieee80211_hw *)data; + struct mwl8k_priv *priv = hw->priv; + int limit; + int i; + + limit = 32; + + spin_lock_bh(&priv->tx_lock); + + for (i = 0; i < mwl8k_tx_queues(priv); i++) + limit -= mwl8k_txq_reclaim(hw, i, limit, 0); + + if (!priv->pending_tx_pkts && priv->tx_wait != NULL) { + complete(priv->tx_wait); + priv->tx_wait = NULL; + } + + spin_unlock_bh(&priv->tx_lock); + + if (limit) { + writel(~MWL8K_A2H_INT_TX_DONE, + priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS); + } else { + tasklet_schedule(&priv->poll_tx_task); + } +} + +static void mwl8k_rx_poll(unsigned long data) +{ + struct ieee80211_hw *hw = (struct ieee80211_hw *)data; + struct mwl8k_priv *priv = hw->priv; + int limit; + + limit = 32; + limit -= rxq_process(hw, 0, limit); + limit -= rxq_refill(hw, 0, limit); + + if (limit) { + writel(~MWL8K_A2H_INT_RX_READY, + priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS); + } else { + tasklet_schedule(&priv->poll_rx_task); + } +} + + +/* + * Core driver operations. + */ +static void mwl8k_tx(struct ieee80211_hw *hw, + struct ieee80211_tx_control *control, + struct sk_buff *skb) +{ + struct mwl8k_priv *priv = hw->priv; + int index = skb_get_queue_mapping(skb); + + if (!priv->radio_on) { + wiphy_debug(hw->wiphy, + "dropped TX frame since radio disabled\n"); + dev_kfree_skb(skb); + return; + } + + mwl8k_txq_xmit(hw, index, control->sta, skb); +} + +static int mwl8k_start(struct ieee80211_hw *hw) +{ + struct mwl8k_priv *priv = hw->priv; + int rc; + + rc = request_irq(priv->pdev->irq, mwl8k_interrupt, + IRQF_SHARED, MWL8K_NAME, hw); + if (rc) { + priv->irq = -1; + wiphy_err(hw->wiphy, "failed to register IRQ handler\n"); + return -EIO; + } + priv->irq = priv->pdev->irq; + + /* Enable TX reclaim and RX tasklets. */ + tasklet_enable(&priv->poll_tx_task); + tasklet_enable(&priv->poll_rx_task); + + /* Enable interrupts */ + iowrite32(MWL8K_A2H_EVENTS, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK); + iowrite32(MWL8K_A2H_EVENTS, + priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK); + + rc = mwl8k_fw_lock(hw); + if (!rc) { + rc = mwl8k_cmd_radio_enable(hw); + + if (!priv->ap_fw) { + if (!rc) + rc = mwl8k_cmd_enable_sniffer(hw, 0); + + if (!rc) + rc = mwl8k_cmd_set_pre_scan(hw); + + if (!rc) + rc = mwl8k_cmd_set_post_scan(hw, + "\x00\x00\x00\x00\x00\x00"); + } + + if (!rc) + rc = mwl8k_cmd_set_rateadapt_mode(hw, 0); + + if (!rc) + rc = mwl8k_cmd_set_wmm_mode(hw, 0); + + mwl8k_fw_unlock(hw); + } + + if (rc) { + iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK); + free_irq(priv->pdev->irq, hw); + priv->irq = -1; + tasklet_disable(&priv->poll_tx_task); + tasklet_disable(&priv->poll_rx_task); + } else { + ieee80211_wake_queues(hw); + } + + return rc; +} + +static void mwl8k_stop(struct ieee80211_hw *hw) +{ + struct mwl8k_priv *priv = hw->priv; + int i; + + if (!priv->hw_restart_in_progress) + mwl8k_cmd_radio_disable(hw); + + ieee80211_stop_queues(hw); + + /* Disable interrupts */ + iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK); + if (priv->irq != -1) { + free_irq(priv->pdev->irq, hw); + priv->irq = -1; + } + + /* Stop finalize join worker */ + cancel_work_sync(&priv->finalize_join_worker); + cancel_work_sync(&priv->watchdog_ba_handle); + if (priv->beacon_skb != NULL) + dev_kfree_skb(priv->beacon_skb); + + /* Stop TX reclaim and RX tasklets. */ + tasklet_disable(&priv->poll_tx_task); + tasklet_disable(&priv->poll_rx_task); + + /* Return all skbs to mac80211 */ + for (i = 0; i < mwl8k_tx_queues(priv); i++) + mwl8k_txq_reclaim(hw, i, INT_MAX, 1); +} + +static int mwl8k_reload_firmware(struct ieee80211_hw *hw, char *fw_image); + +static int mwl8k_add_interface(struct ieee80211_hw *hw, + struct ieee80211_vif *vif) +{ + struct mwl8k_priv *priv = hw->priv; + struct mwl8k_vif *mwl8k_vif; + u32 macids_supported; + int macid, rc; + struct mwl8k_device_info *di; + + /* + * Reject interface creation if sniffer mode is active, as + * STA operation is mutually exclusive with hardware sniffer + * mode. (Sniffer mode is only used on STA firmware.) + */ + if (priv->sniffer_enabled) { + wiphy_info(hw->wiphy, + "unable to create STA interface because sniffer mode is enabled\n"); + return -EINVAL; + } + + di = priv->device_info; + switch (vif->type) { + case NL80211_IFTYPE_AP: + if (!priv->ap_fw && di->fw_image_ap) { + /* we must load the ap fw to meet this request */ + if (!list_empty(&priv->vif_list)) + return -EBUSY; + rc = mwl8k_reload_firmware(hw, di->fw_image_ap); + if (rc) + return rc; + } + macids_supported = priv->ap_macids_supported; + break; + case NL80211_IFTYPE_STATION: + if (priv->ap_fw && di->fw_image_sta) { + if (!list_empty(&priv->vif_list)) { + wiphy_warn(hw->wiphy, "AP interface is running.\n" + "Adding STA interface for WDS"); + } else { + /* we must load the sta fw to + * meet this request. + */ + rc = mwl8k_reload_firmware(hw, + di->fw_image_sta); + if (rc) + return rc; + } + } + macids_supported = priv->sta_macids_supported; + break; + default: + return -EINVAL; + } + + macid = ffs(macids_supported & ~priv->macids_used); + if (!macid--) + return -EBUSY; + + /* Setup driver private area. */ + mwl8k_vif = MWL8K_VIF(vif); + memset(mwl8k_vif, 0, sizeof(*mwl8k_vif)); + mwl8k_vif->vif = vif; + mwl8k_vif->macid = macid; + mwl8k_vif->seqno = 0; + memcpy(mwl8k_vif->bssid, vif->addr, ETH_ALEN); + mwl8k_vif->is_hw_crypto_enabled = false; + + /* Set the mac address. */ + mwl8k_cmd_set_mac_addr(hw, vif, vif->addr); + + if (vif->type == NL80211_IFTYPE_AP) + mwl8k_cmd_set_new_stn_add_self(hw, vif); + + priv->macids_used |= 1 << mwl8k_vif->macid; + list_add_tail(&mwl8k_vif->list, &priv->vif_list); + + return 0; +} + +static void mwl8k_remove_vif(struct mwl8k_priv *priv, struct mwl8k_vif *vif) +{ + /* Has ieee80211_restart_hw re-added the removed interfaces? */ + if (!priv->macids_used) + return; + + priv->macids_used &= ~(1 << vif->macid); + list_del(&vif->list); +} + +static void mwl8k_remove_interface(struct ieee80211_hw *hw, + struct ieee80211_vif *vif) +{ + struct mwl8k_priv *priv = hw->priv; + struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif); + + if (vif->type == NL80211_IFTYPE_AP) + mwl8k_cmd_set_new_stn_del(hw, vif, vif->addr); + + mwl8k_cmd_del_mac_addr(hw, vif, vif->addr); + + mwl8k_remove_vif(priv, mwl8k_vif); +} + +static void mwl8k_hw_restart_work(struct work_struct *work) +{ + struct mwl8k_priv *priv = + container_of(work, struct mwl8k_priv, fw_reload); + struct ieee80211_hw *hw = priv->hw; + struct mwl8k_device_info *di; + int rc; + + /* If some command is waiting for a response, clear it */ + if (priv->hostcmd_wait != NULL) { + complete(priv->hostcmd_wait); + priv->hostcmd_wait = NULL; + } + + priv->hw_restart_owner = current; + di = priv->device_info; + mwl8k_fw_lock(hw); + + if (priv->ap_fw) + rc = mwl8k_reload_firmware(hw, di->fw_image_ap); + else + rc = mwl8k_reload_firmware(hw, di->fw_image_sta); + + if (rc) + goto fail; + + priv->hw_restart_owner = NULL; + priv->hw_restart_in_progress = false; + + /* + * This unlock will wake up the queues and + * also opens the command path for other + * commands + */ + mwl8k_fw_unlock(hw); + + ieee80211_restart_hw(hw); + + wiphy_err(hw->wiphy, "Firmware restarted successfully\n"); + + return; +fail: + mwl8k_fw_unlock(hw); + + wiphy_err(hw->wiphy, "Firmware restart failed\n"); +} + +static int mwl8k_config(struct ieee80211_hw *hw, u32 changed) +{ + struct ieee80211_conf *conf = &hw->conf; + struct mwl8k_priv *priv = hw->priv; + int rc; + + rc = mwl8k_fw_lock(hw); + if (rc) + return rc; + + if (conf->flags & IEEE80211_CONF_IDLE) + rc = mwl8k_cmd_radio_disable(hw); + else + rc = mwl8k_cmd_radio_enable(hw); + if (rc) + goto out; + + if (changed & IEEE80211_CONF_CHANGE_CHANNEL) { + rc = mwl8k_cmd_set_rf_channel(hw, conf); + if (rc) + goto out; + } + + if (conf->power_level > 18) + conf->power_level = 18; + + if (priv->ap_fw) { + + if (conf->flags & IEEE80211_CONF_CHANGE_POWER) { + rc = mwl8k_cmd_tx_power(hw, conf, conf->power_level); + if (rc) + goto out; + } + + + } else { + rc = mwl8k_cmd_rf_tx_power(hw, conf->power_level); + if (rc) + goto out; + rc = mwl8k_cmd_mimo_config(hw, 0x7, 0x7); + } + +out: + mwl8k_fw_unlock(hw); + + return rc; +} + +static void +mwl8k_bss_info_changed_sta(struct ieee80211_hw *hw, struct ieee80211_vif *vif, + struct ieee80211_bss_conf *info, u32 changed) +{ + struct mwl8k_priv *priv = hw->priv; + u32 ap_legacy_rates = 0; + u8 ap_mcs_rates[16]; + int rc; + + if (mwl8k_fw_lock(hw)) + return; + + /* + * No need to capture a beacon if we're no longer associated. + */ + if ((changed & BSS_CHANGED_ASSOC) && !vif->bss_conf.assoc) + priv->capture_beacon = false; + + /* + * Get the AP's legacy and MCS rates. + */ + if (vif->bss_conf.assoc) { + struct ieee80211_sta *ap; + + rcu_read_lock(); + + ap = ieee80211_find_sta(vif, vif->bss_conf.bssid); + if (ap == NULL) { + rcu_read_unlock(); + goto out; + } + + if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ) { + ap_legacy_rates = ap->supp_rates[NL80211_BAND_2GHZ]; + } else { + ap_legacy_rates = + ap->supp_rates[NL80211_BAND_5GHZ] << 5; + } + memcpy(ap_mcs_rates, ap->ht_cap.mcs.rx_mask, 16); + + rcu_read_unlock(); + + if (changed & BSS_CHANGED_ASSOC) { + if (!priv->ap_fw) { + rc = mwl8k_cmd_set_rate(hw, vif, + ap_legacy_rates, + ap_mcs_rates); + if (rc) + goto out; + + rc = mwl8k_cmd_use_fixed_rate_sta(hw); + if (rc) + goto out; + } else { + int idx; + int rate; + + /* Use AP firmware specific rate command. + */ + idx = ffs(vif->bss_conf.basic_rates); + if (idx) + idx--; + + if (hw->conf.chandef.chan->band == + NL80211_BAND_2GHZ) + rate = mwl8k_rates_24[idx].hw_value; + else + rate = mwl8k_rates_50[idx].hw_value; + + mwl8k_cmd_use_fixed_rate_ap(hw, rate, rate); + } + } + } + + if (changed & BSS_CHANGED_ERP_PREAMBLE) { + rc = mwl8k_set_radio_preamble(hw, + vif->bss_conf.use_short_preamble); + if (rc) + goto out; + } + + if ((changed & BSS_CHANGED_ERP_SLOT) && !priv->ap_fw) { + rc = mwl8k_cmd_set_slot(hw, vif->bss_conf.use_short_slot); + if (rc) + goto out; + } + + if (vif->bss_conf.assoc && !priv->ap_fw && + (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_ERP_CTS_PROT | + BSS_CHANGED_HT))) { + rc = mwl8k_cmd_set_aid(hw, vif, ap_legacy_rates); + if (rc) + goto out; + } + + if (vif->bss_conf.assoc && + (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_BEACON_INT))) { + /* + * Finalize the join. Tell rx handler to process + * next beacon from our BSSID. + */ + memcpy(priv->capture_bssid, vif->bss_conf.bssid, ETH_ALEN); + priv->capture_beacon = true; + } + +out: + mwl8k_fw_unlock(hw); +} + +static void +mwl8k_bss_info_changed_ap(struct ieee80211_hw *hw, struct ieee80211_vif *vif, + struct ieee80211_bss_conf *info, u32 changed) +{ + int rc; + + if (mwl8k_fw_lock(hw)) + return; + + if (changed & BSS_CHANGED_ERP_PREAMBLE) { + rc = mwl8k_set_radio_preamble(hw, + vif->bss_conf.use_short_preamble); + if (rc) + goto out; + } + + if (changed & BSS_CHANGED_BASIC_RATES) { + int idx; + int rate; + + /* + * Use lowest supported basic rate for multicasts + * and management frames (such as probe responses -- + * beacons will always go out at 1 Mb/s). + */ + idx = ffs(vif->bss_conf.basic_rates); + if (idx) + idx--; + + if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ) + rate = mwl8k_rates_24[idx].hw_value; + else + rate = mwl8k_rates_50[idx].hw_value; + + mwl8k_cmd_use_fixed_rate_ap(hw, rate, rate); + } + + if (changed & (BSS_CHANGED_BEACON_INT | BSS_CHANGED_BEACON)) { + struct sk_buff *skb; + + skb = ieee80211_beacon_get(hw, vif); + if (skb != NULL) { + mwl8k_cmd_set_beacon(hw, vif, skb->data, skb->len); + kfree_skb(skb); + } + } + + if (changed & BSS_CHANGED_BEACON_ENABLED) + mwl8k_cmd_bss_start(hw, vif, info->enable_beacon); + +out: + mwl8k_fw_unlock(hw); +} + +static void +mwl8k_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif, + struct ieee80211_bss_conf *info, u32 changed) +{ + if (vif->type == NL80211_IFTYPE_STATION) + mwl8k_bss_info_changed_sta(hw, vif, info, changed); + if (vif->type == NL80211_IFTYPE_AP) + mwl8k_bss_info_changed_ap(hw, vif, info, changed); +} + +static u64 mwl8k_prepare_multicast(struct ieee80211_hw *hw, + struct netdev_hw_addr_list *mc_list) +{ + struct mwl8k_cmd_pkt *cmd; + + /* + * Synthesize and return a command packet that programs the + * hardware multicast address filter. At this point we don't + * know whether FIF_ALLMULTI is being requested, but if it is, + * we'll end up throwing this packet away and creating a new + * one in mwl8k_configure_filter(). + */ + cmd = __mwl8k_cmd_mac_multicast_adr(hw, 0, mc_list); + + return (unsigned long)cmd; +} + +static int +mwl8k_configure_filter_sniffer(struct ieee80211_hw *hw, + unsigned int changed_flags, + unsigned int *total_flags) +{ + struct mwl8k_priv *priv = hw->priv; + + /* + * Hardware sniffer mode is mutually exclusive with STA + * operation, so refuse to enable sniffer mode if a STA + * interface is active. + */ + if (!list_empty(&priv->vif_list)) { + if (net_ratelimit()) + wiphy_info(hw->wiphy, + "not enabling sniffer mode because STA interface is active\n"); + return 0; + } + + if (!priv->sniffer_enabled) { + if (mwl8k_cmd_enable_sniffer(hw, 1)) + return 0; + priv->sniffer_enabled = true; + } + + *total_flags &= FIF_ALLMULTI | + FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL | + FIF_OTHER_BSS; + + return 1; +} + +static struct mwl8k_vif *mwl8k_first_vif(struct mwl8k_priv *priv) +{ + if (!list_empty(&priv->vif_list)) + return list_entry(priv->vif_list.next, struct mwl8k_vif, list); + + return NULL; +} + +static void mwl8k_configure_filter(struct ieee80211_hw *hw, + unsigned int changed_flags, + unsigned int *total_flags, + u64 multicast) +{ + struct mwl8k_priv *priv = hw->priv; + struct mwl8k_cmd_pkt *cmd = (void *)(unsigned long)multicast; + + /* + * AP firmware doesn't allow fine-grained control over + * the receive filter. + */ + if (priv->ap_fw) { + *total_flags &= FIF_ALLMULTI | FIF_BCN_PRBRESP_PROMISC; + kfree(cmd); + return; + } + + /* + * Enable hardware sniffer mode if FIF_CONTROL or + * FIF_OTHER_BSS is requested. + */ + if (*total_flags & (FIF_CONTROL | FIF_OTHER_BSS) && + mwl8k_configure_filter_sniffer(hw, changed_flags, total_flags)) { + kfree(cmd); + return; + } + + /* Clear unsupported feature flags */ + *total_flags &= FIF_ALLMULTI | FIF_BCN_PRBRESP_PROMISC; + + if (mwl8k_fw_lock(hw)) { + kfree(cmd); + return; + } + + if (priv->sniffer_enabled) { + mwl8k_cmd_enable_sniffer(hw, 0); + priv->sniffer_enabled = false; + } + + if (changed_flags & FIF_BCN_PRBRESP_PROMISC) { + if (*total_flags & FIF_BCN_PRBRESP_PROMISC) { + /* + * Disable the BSS filter. + */ + mwl8k_cmd_set_pre_scan(hw); + } else { + struct mwl8k_vif *mwl8k_vif; + const u8 *bssid; + + /* + * Enable the BSS filter. + * + * If there is an active STA interface, use that + * interface's BSSID, otherwise use a dummy one + * (where the OUI part needs to be nonzero for + * the BSSID to be accepted by POST_SCAN). + */ + mwl8k_vif = mwl8k_first_vif(priv); + if (mwl8k_vif != NULL) + bssid = mwl8k_vif->vif->bss_conf.bssid; + else + bssid = "\x01\x00\x00\x00\x00\x00"; + + mwl8k_cmd_set_post_scan(hw, bssid); + } + } + + /* + * If FIF_ALLMULTI is being requested, throw away the command + * packet that ->prepare_multicast() built and replace it with + * a command packet that enables reception of all multicast + * packets. + */ + if (*total_flags & FIF_ALLMULTI) { + kfree(cmd); + cmd = __mwl8k_cmd_mac_multicast_adr(hw, 1, NULL); + } + + if (cmd != NULL) { + mwl8k_post_cmd(hw, cmd); + kfree(cmd); + } + + mwl8k_fw_unlock(hw); +} + +static int mwl8k_set_rts_threshold(struct ieee80211_hw *hw, u32 value) +{ + return mwl8k_cmd_set_rts_threshold(hw, value); +} + +static int mwl8k_sta_remove(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + struct ieee80211_sta *sta) +{ + struct mwl8k_priv *priv = hw->priv; + + if (priv->ap_fw) + return mwl8k_cmd_set_new_stn_del(hw, vif, sta->addr); + else + return mwl8k_cmd_update_stadb_del(hw, vif, sta->addr); +} + +static int mwl8k_sta_add(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + struct ieee80211_sta *sta) +{ + struct mwl8k_priv *priv = hw->priv; + int ret; + int i; + struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif); + struct ieee80211_key_conf *key; + + if (!priv->ap_fw) { + ret = mwl8k_cmd_update_stadb_add(hw, vif, sta); + if (ret >= 0) { + MWL8K_STA(sta)->peer_id = ret; + if (sta->ht_cap.ht_supported) + MWL8K_STA(sta)->is_ampdu_allowed = true; + ret = 0; + } + + } else { + ret = mwl8k_cmd_set_new_stn_add(hw, vif, sta); + } + + for (i = 0; i < NUM_WEP_KEYS; i++) { + key = IEEE80211_KEY_CONF(mwl8k_vif->wep_key_conf[i].key); + if (mwl8k_vif->wep_key_conf[i].enabled) + mwl8k_set_key(hw, SET_KEY, vif, sta, key); + } + return ret; +} + +static int mwl8k_conf_tx(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, u16 queue, + const struct ieee80211_tx_queue_params *params) +{ + struct mwl8k_priv *priv = hw->priv; + int rc; + + rc = mwl8k_fw_lock(hw); + if (!rc) { + BUG_ON(queue > MWL8K_TX_WMM_QUEUES - 1); + memcpy(&priv->wmm_params[queue], params, sizeof(*params)); + + if (!priv->wmm_enabled) + rc = mwl8k_cmd_set_wmm_mode(hw, 1); + + if (!rc) { + int q = MWL8K_TX_WMM_QUEUES - 1 - queue; + rc = mwl8k_cmd_set_edca_params(hw, q, + params->cw_min, + params->cw_max, + params->aifs, + params->txop); + } + + mwl8k_fw_unlock(hw); + } + + return rc; +} + +static int mwl8k_get_stats(struct ieee80211_hw *hw, + struct ieee80211_low_level_stats *stats) +{ + return mwl8k_cmd_get_stat(hw, stats); +} + +static int mwl8k_get_survey(struct ieee80211_hw *hw, int idx, + struct survey_info *survey) +{ + struct mwl8k_priv *priv = hw->priv; + struct ieee80211_conf *conf = &hw->conf; + struct ieee80211_supported_band *sband; + + if (priv->ap_fw) { + sband = hw->wiphy->bands[NL80211_BAND_2GHZ]; + + if (sband && idx >= sband->n_channels) { + idx -= sband->n_channels; + sband = NULL; + } + + if (!sband) + sband = hw->wiphy->bands[NL80211_BAND_5GHZ]; + + if (!sband || idx >= sband->n_channels) + return -ENOENT; + + memcpy(survey, &priv->survey[idx], sizeof(*survey)); + survey->channel = &sband->channels[idx]; + + return 0; + } + + if (idx != 0) + return -ENOENT; + + survey->channel = conf->chandef.chan; + survey->filled = SURVEY_INFO_NOISE_DBM; + survey->noise = priv->noise; + + return 0; +} + +#define MAX_AMPDU_ATTEMPTS 5 + +static int +mwl8k_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif, + struct ieee80211_ampdu_params *params) +{ + struct ieee80211_sta *sta = params->sta; + enum ieee80211_ampdu_mlme_action action = params->action; + u16 tid = params->tid; + u16 *ssn = ¶ms->ssn; + u8 buf_size = params->buf_size; + int i, rc = 0; + struct mwl8k_priv *priv = hw->priv; + struct mwl8k_ampdu_stream *stream; + u8 *addr = sta->addr, idx; + struct mwl8k_sta *sta_info = MWL8K_STA(sta); + + if (!ieee80211_hw_check(hw, AMPDU_AGGREGATION)) + return -ENOTSUPP; + + spin_lock(&priv->stream_lock); + stream = mwl8k_lookup_stream(hw, addr, tid); + + switch (action) { + case IEEE80211_AMPDU_RX_START: + case IEEE80211_AMPDU_RX_STOP: + break; + case IEEE80211_AMPDU_TX_START: + /* By the time we get here the hw queues may contain outgoing + * packets for this RA/TID that are not part of this BA + * session. The hw will assign sequence numbers to these + * packets as they go out. So if we query the hw for its next + * sequence number and use that for the SSN here, it may end up + * being wrong, which will lead to sequence number mismatch at + * the recipient. To avoid this, we reset the sequence number + * to O for the first MPDU in this BA stream. + */ + *ssn = 0; + if (stream == NULL) { + /* This means that somebody outside this driver called + * ieee80211_start_tx_ba_session. This is unexpected + * because we do our own rate control. Just warn and + * move on. + */ + wiphy_warn(hw->wiphy, "Unexpected call to %s. " + "Proceeding anyway.\n", __func__); + stream = mwl8k_add_stream(hw, sta, tid); + } + if (stream == NULL) { + wiphy_debug(hw->wiphy, "no free AMPDU streams\n"); + rc = -EBUSY; + break; + } + stream->state = AMPDU_STREAM_IN_PROGRESS; + + /* Release the lock before we do the time consuming stuff */ + spin_unlock(&priv->stream_lock); + for (i = 0; i < MAX_AMPDU_ATTEMPTS; i++) { + + /* Check if link is still valid */ + if (!sta_info->is_ampdu_allowed) { + spin_lock(&priv->stream_lock); + mwl8k_remove_stream(hw, stream); + spin_unlock(&priv->stream_lock); + return -EBUSY; + } + + rc = mwl8k_check_ba(hw, stream, vif); + + /* If HW restart is in progress mwl8k_post_cmd will + * return -EBUSY. Avoid retrying mwl8k_check_ba in + * such cases + */ + if (!rc || rc == -EBUSY) + break; + /* + * HW queues take time to be flushed, give them + * sufficient time + */ + + msleep(1000); + } + spin_lock(&priv->stream_lock); + if (rc) { + wiphy_err(hw->wiphy, "Stream for tid %d busy after %d" + " attempts\n", tid, MAX_AMPDU_ATTEMPTS); + mwl8k_remove_stream(hw, stream); + rc = -EBUSY; + break; + } + ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid); + break; + case IEEE80211_AMPDU_TX_STOP_CONT: + case IEEE80211_AMPDU_TX_STOP_FLUSH: + case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: + if (stream) { + if (stream->state == AMPDU_STREAM_ACTIVE) { + idx = stream->idx; + spin_unlock(&priv->stream_lock); + mwl8k_destroy_ba(hw, idx); + spin_lock(&priv->stream_lock); + } + mwl8k_remove_stream(hw, stream); + } + ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid); + break; + case IEEE80211_AMPDU_TX_OPERATIONAL: + BUG_ON(stream == NULL); + BUG_ON(stream->state != AMPDU_STREAM_IN_PROGRESS); + spin_unlock(&priv->stream_lock); + rc = mwl8k_create_ba(hw, stream, buf_size, vif); + spin_lock(&priv->stream_lock); + if (!rc) + stream->state = AMPDU_STREAM_ACTIVE; + else { + idx = stream->idx; + spin_unlock(&priv->stream_lock); + mwl8k_destroy_ba(hw, idx); + spin_lock(&priv->stream_lock); + wiphy_debug(hw->wiphy, + "Failed adding stream for sta %pM tid %d\n", + addr, tid); + mwl8k_remove_stream(hw, stream); + } + break; + + default: + rc = -ENOTSUPP; + } + + spin_unlock(&priv->stream_lock); + return rc; +} + +static void mwl8k_sw_scan_start(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + const u8 *mac_addr) +{ + struct mwl8k_priv *priv = hw->priv; + u8 tmp; + + if (!priv->ap_fw) + return; + + /* clear all stats */ + priv->channel_time = 0; + ioread32(priv->regs + BBU_RXRDY_CNT_REG); + ioread32(priv->regs + NOK_CCA_CNT_REG); + mwl8k_cmd_bbp_reg_access(priv->hw, 0, BBU_AVG_NOISE_VAL, &tmp); + + priv->sw_scan_start = true; +} + +static void mwl8k_sw_scan_complete(struct ieee80211_hw *hw, + struct ieee80211_vif *vif) +{ + struct mwl8k_priv *priv = hw->priv; + u8 tmp; + + if (!priv->ap_fw) + return; + + priv->sw_scan_start = false; + + /* clear all stats */ + priv->channel_time = 0; + ioread32(priv->regs + BBU_RXRDY_CNT_REG); + ioread32(priv->regs + NOK_CCA_CNT_REG); + mwl8k_cmd_bbp_reg_access(priv->hw, 0, BBU_AVG_NOISE_VAL, &tmp); +} + +static const struct ieee80211_ops mwl8k_ops = { + .tx = mwl8k_tx, + .start = mwl8k_start, + .stop = mwl8k_stop, + .add_interface = mwl8k_add_interface, + .remove_interface = mwl8k_remove_interface, + .config = mwl8k_config, + .bss_info_changed = mwl8k_bss_info_changed, + .prepare_multicast = mwl8k_prepare_multicast, + .configure_filter = mwl8k_configure_filter, + .set_key = mwl8k_set_key, + .set_rts_threshold = mwl8k_set_rts_threshold, + .sta_add = mwl8k_sta_add, + .sta_remove = mwl8k_sta_remove, + .conf_tx = mwl8k_conf_tx, + .get_stats = mwl8k_get_stats, + .get_survey = mwl8k_get_survey, + .ampdu_action = mwl8k_ampdu_action, + .sw_scan_start = mwl8k_sw_scan_start, + .sw_scan_complete = mwl8k_sw_scan_complete, +}; + +static void mwl8k_finalize_join_worker(struct work_struct *work) +{ + struct mwl8k_priv *priv = + container_of(work, struct mwl8k_priv, finalize_join_worker); + struct sk_buff *skb = priv->beacon_skb; + struct ieee80211_mgmt *mgmt = (void *)skb->data; + int len = skb->len - offsetof(struct ieee80211_mgmt, u.beacon.variable); + const u8 *tim = cfg80211_find_ie(WLAN_EID_TIM, + mgmt->u.beacon.variable, len); + int dtim_period = 1; + + if (tim && tim[1] >= 2) + dtim_period = tim[3]; + + mwl8k_cmd_finalize_join(priv->hw, skb->data, skb->len, dtim_period); + + dev_kfree_skb(skb); + priv->beacon_skb = NULL; +} + +enum { + MWL8363 = 0, + MWL8687, + MWL8366, + MWL8764, +}; + +#define MWL8K_8366_AP_FW_API 3 +#define _MWL8K_8366_AP_FW(api) "mwl8k/fmimage_8366_ap-" #api ".fw" +#define MWL8K_8366_AP_FW(api) _MWL8K_8366_AP_FW(api) + +#define MWL8K_8764_AP_FW_API 1 +#define _MWL8K_8764_AP_FW(api) "mwl8k/fmimage_8764_ap-" #api ".fw" +#define MWL8K_8764_AP_FW(api) _MWL8K_8764_AP_FW(api) + +static struct mwl8k_device_info mwl8k_info_tbl[] = { + [MWL8363] = { + .part_name = "88w8363", + .helper_image = "mwl8k/helper_8363.fw", + .fw_image_sta = "mwl8k/fmimage_8363.fw", + }, + [MWL8687] = { + .part_name = "88w8687", + .helper_image = "mwl8k/helper_8687.fw", + .fw_image_sta = "mwl8k/fmimage_8687.fw", + }, + [MWL8366] = { + .part_name = "88w8366", + .helper_image = "mwl8k/helper_8366.fw", + .fw_image_sta = "mwl8k/fmimage_8366.fw", + .fw_image_ap = MWL8K_8366_AP_FW(MWL8K_8366_AP_FW_API), + .fw_api_ap = MWL8K_8366_AP_FW_API, + .ap_rxd_ops = &rxd_ap_ops, + }, + [MWL8764] = { + .part_name = "88w8764", + .fw_image_ap = MWL8K_8764_AP_FW(MWL8K_8764_AP_FW_API), + .fw_api_ap = MWL8K_8764_AP_FW_API, + .ap_rxd_ops = &rxd_ap_ops, + }, +}; + +MODULE_FIRMWARE("mwl8k/helper_8363.fw"); +MODULE_FIRMWARE("mwl8k/fmimage_8363.fw"); +MODULE_FIRMWARE("mwl8k/helper_8687.fw"); +MODULE_FIRMWARE("mwl8k/fmimage_8687.fw"); +MODULE_FIRMWARE("mwl8k/helper_8366.fw"); +MODULE_FIRMWARE("mwl8k/fmimage_8366.fw"); +MODULE_FIRMWARE(MWL8K_8366_AP_FW(MWL8K_8366_AP_FW_API)); + +static const struct pci_device_id mwl8k_pci_id_table[] = { + { PCI_VDEVICE(MARVELL, 0x2a0a), .driver_data = MWL8363, }, + { PCI_VDEVICE(MARVELL, 0x2a0c), .driver_data = MWL8363, }, + { PCI_VDEVICE(MARVELL, 0x2a24), .driver_data = MWL8363, }, + { PCI_VDEVICE(MARVELL, 0x2a2b), .driver_data = MWL8687, }, + { PCI_VDEVICE(MARVELL, 0x2a30), .driver_data = MWL8687, }, + { PCI_VDEVICE(MARVELL, 0x2a40), .driver_data = MWL8366, }, + { PCI_VDEVICE(MARVELL, 0x2a41), .driver_data = MWL8366, }, + { PCI_VDEVICE(MARVELL, 0x2a42), .driver_data = MWL8366, }, + { PCI_VDEVICE(MARVELL, 0x2a43), .driver_data = MWL8366, }, + { PCI_VDEVICE(MARVELL, 0x2b36), .driver_data = MWL8764, }, + { }, +}; +MODULE_DEVICE_TABLE(pci, mwl8k_pci_id_table); + +static int mwl8k_request_alt_fw(struct mwl8k_priv *priv) +{ + int rc; + printk(KERN_ERR "%s: Error requesting preferred fw %s.\n" + "Trying alternative firmware %s\n", pci_name(priv->pdev), + priv->fw_pref, priv->fw_alt); + rc = mwl8k_request_fw(priv, priv->fw_alt, &priv->fw_ucode, true); + if (rc) { + printk(KERN_ERR "%s: Error requesting alt fw %s\n", + pci_name(priv->pdev), priv->fw_alt); + return rc; + } + return 0; +} + +static int mwl8k_firmware_load_success(struct mwl8k_priv *priv); +static void mwl8k_fw_state_machine(const struct firmware *fw, void *context) +{ + struct mwl8k_priv *priv = context; + struct mwl8k_device_info *di = priv->device_info; + int rc; + + switch (priv->fw_state) { + case FW_STATE_INIT: + if (!fw) { + printk(KERN_ERR "%s: Error requesting helper fw %s\n", + pci_name(priv->pdev), di->helper_image); + goto fail; + } + priv->fw_helper = fw; + rc = mwl8k_request_fw(priv, priv->fw_pref, &priv->fw_ucode, + true); + if (rc && priv->fw_alt) { + rc = mwl8k_request_alt_fw(priv); + if (rc) + goto fail; + priv->fw_state = FW_STATE_LOADING_ALT; + } else if (rc) + goto fail; + else + priv->fw_state = FW_STATE_LOADING_PREF; + break; + + case FW_STATE_LOADING_PREF: + if (!fw) { + if (priv->fw_alt) { + rc = mwl8k_request_alt_fw(priv); + if (rc) + goto fail; + priv->fw_state = FW_STATE_LOADING_ALT; + } else + goto fail; + } else { + priv->fw_ucode = fw; + rc = mwl8k_firmware_load_success(priv); + if (rc) + goto fail; + else + complete(&priv->firmware_loading_complete); + } + break; + + case FW_STATE_LOADING_ALT: + if (!fw) { + printk(KERN_ERR "%s: Error requesting alt fw %s\n", + pci_name(priv->pdev), di->helper_image); + goto fail; + } + priv->fw_ucode = fw; + rc = mwl8k_firmware_load_success(priv); + if (rc) + goto fail; + else + complete(&priv->firmware_loading_complete); + break; + + default: + printk(KERN_ERR "%s: Unexpected firmware loading state: %d\n", + MWL8K_NAME, priv->fw_state); + BUG_ON(1); + } + + return; + +fail: + priv->fw_state = FW_STATE_ERROR; + complete(&priv->firmware_loading_complete); + device_release_driver(&priv->pdev->dev); + mwl8k_release_firmware(priv); +} + +#define MAX_RESTART_ATTEMPTS 1 +static int mwl8k_init_firmware(struct ieee80211_hw *hw, char *fw_image, + bool nowait) +{ + struct mwl8k_priv *priv = hw->priv; + int rc; + int count = MAX_RESTART_ATTEMPTS; + +retry: + /* Reset firmware and hardware */ + mwl8k_hw_reset(priv); + + /* Ask userland hotplug daemon for the device firmware */ + rc = mwl8k_request_firmware(priv, fw_image, nowait); + if (rc) { + wiphy_err(hw->wiphy, "Firmware files not found\n"); + return rc; + } + + if (nowait) + return rc; + + /* Load firmware into hardware */ + rc = mwl8k_load_firmware(hw); + if (rc) + wiphy_err(hw->wiphy, "Cannot start firmware\n"); + + /* Reclaim memory once firmware is successfully loaded */ + mwl8k_release_firmware(priv); + + if (rc && count) { + /* FW did not start successfully; + * lets try one more time + */ + count--; + wiphy_err(hw->wiphy, "Trying to reload the firmware again\n"); + msleep(20); + goto retry; + } + + return rc; +} + +static int mwl8k_init_txqs(struct ieee80211_hw *hw) +{ + struct mwl8k_priv *priv = hw->priv; + int rc = 0; + int i; + + for (i = 0; i < mwl8k_tx_queues(priv); i++) { + rc = mwl8k_txq_init(hw, i); + if (rc) + break; + if (priv->ap_fw) + iowrite32(priv->txq[i].txd_dma, + priv->sram + priv->txq_offset[i]); + } + return rc; +} + +/* initialize hw after successfully loading a firmware image */ +static int mwl8k_probe_hw(struct ieee80211_hw *hw) +{ + struct mwl8k_priv *priv = hw->priv; + int rc = 0; + int i; + + if (priv->ap_fw) { + priv->rxd_ops = priv->device_info->ap_rxd_ops; + if (priv->rxd_ops == NULL) { + wiphy_err(hw->wiphy, + "Driver does not have AP firmware image support for this hardware\n"); + rc = -ENOENT; + goto err_stop_firmware; + } + } else { + priv->rxd_ops = &rxd_sta_ops; + } + + priv->sniffer_enabled = false; + priv->wmm_enabled = false; + priv->pending_tx_pkts = 0; + atomic_set(&priv->watchdog_event_pending, 0); + + rc = mwl8k_rxq_init(hw, 0); + if (rc) + goto err_stop_firmware; + rxq_refill(hw, 0, INT_MAX); + + /* For the sta firmware, we need to know the dma addresses of tx queues + * before sending MWL8K_CMD_GET_HW_SPEC. So we must initialize them + * prior to issuing this command. But for the AP case, we learn the + * total number of queues from the result CMD_GET_HW_SPEC, so for this + * case we must initialize the tx queues after. + */ + priv->num_ampdu_queues = 0; + if (!priv->ap_fw) { + rc = mwl8k_init_txqs(hw); + if (rc) + goto err_free_queues; + } + + iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS); + iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK); + iowrite32(MWL8K_A2H_INT_TX_DONE|MWL8K_A2H_INT_RX_READY| + MWL8K_A2H_INT_BA_WATCHDOG, + priv->regs + MWL8K_HIU_A2H_INTERRUPT_CLEAR_SEL); + iowrite32(MWL8K_A2H_INT_OPC_DONE, + priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK); + + rc = request_irq(priv->pdev->irq, mwl8k_interrupt, + IRQF_SHARED, MWL8K_NAME, hw); + if (rc) { + wiphy_err(hw->wiphy, "failed to register IRQ handler\n"); + goto err_free_queues; + } + + /* + * When hw restart is requested, + * mac80211 will take care of clearing + * the ampdu streams, so do not clear + * the ampdu state here + */ + if (!priv->hw_restart_in_progress) + memset(priv->ampdu, 0, sizeof(priv->ampdu)); + + /* + * Temporarily enable interrupts. Initial firmware host + * commands use interrupts and avoid polling. Disable + * interrupts when done. + */ + iowrite32(MWL8K_A2H_EVENTS, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK); + + /* Get config data, mac addrs etc */ + if (priv->ap_fw) { + rc = mwl8k_cmd_get_hw_spec_ap(hw); + if (!rc) + rc = mwl8k_init_txqs(hw); + if (!rc) + rc = mwl8k_cmd_set_hw_spec(hw); + } else { + rc = mwl8k_cmd_get_hw_spec_sta(hw); + } + if (rc) { + wiphy_err(hw->wiphy, "Cannot initialise firmware\n"); + goto err_free_irq; + } + + /* Turn radio off */ + rc = mwl8k_cmd_radio_disable(hw); + if (rc) { + wiphy_err(hw->wiphy, "Cannot disable\n"); + goto err_free_irq; + } + + /* Clear MAC address */ + rc = mwl8k_cmd_set_mac_addr(hw, NULL, "\x00\x00\x00\x00\x00\x00"); + if (rc) { + wiphy_err(hw->wiphy, "Cannot clear MAC address\n"); + goto err_free_irq; + } + + /* Configure Antennas */ + rc = mwl8k_cmd_rf_antenna(hw, MWL8K_RF_ANTENNA_RX, 0x3); + if (rc) + wiphy_warn(hw->wiphy, "failed to set # of RX antennas"); + rc = mwl8k_cmd_rf_antenna(hw, MWL8K_RF_ANTENNA_TX, 0x7); + if (rc) + wiphy_warn(hw->wiphy, "failed to set # of TX antennas"); + + + /* Disable interrupts */ + iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK); + free_irq(priv->pdev->irq, hw); + + wiphy_info(hw->wiphy, "%s v%d, %pm, %s firmware %u.%u.%u.%u\n", + priv->device_info->part_name, + priv->hw_rev, hw->wiphy->perm_addr, + priv->ap_fw ? "AP" : "STA", + (priv->fw_rev >> 24) & 0xff, (priv->fw_rev >> 16) & 0xff, + (priv->fw_rev >> 8) & 0xff, priv->fw_rev & 0xff); + + return 0; + +err_free_irq: + iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK); + free_irq(priv->pdev->irq, hw); + +err_free_queues: + for (i = 0; i < mwl8k_tx_queues(priv); i++) + mwl8k_txq_deinit(hw, i); + mwl8k_rxq_deinit(hw, 0); + +err_stop_firmware: + mwl8k_hw_reset(priv); + + return rc; +} + +/* + * invoke mwl8k_reload_firmware to change the firmware image after the device + * has already been registered + */ +static int mwl8k_reload_firmware(struct ieee80211_hw *hw, char *fw_image) +{ + int i, rc = 0; + struct mwl8k_priv *priv = hw->priv; + struct mwl8k_vif *vif, *tmp_vif; + + mwl8k_stop(hw); + mwl8k_rxq_deinit(hw, 0); + + /* + * All the existing interfaces are re-added by the ieee80211_reconfig; + * which means driver should remove existing interfaces before calling + * ieee80211_restart_hw + */ + if (priv->hw_restart_in_progress) + list_for_each_entry_safe(vif, tmp_vif, &priv->vif_list, list) + mwl8k_remove_vif(priv, vif); + + for (i = 0; i < mwl8k_tx_queues(priv); i++) + mwl8k_txq_deinit(hw, i); + + rc = mwl8k_init_firmware(hw, fw_image, false); + if (rc) + goto fail; + + rc = mwl8k_probe_hw(hw); + if (rc) + goto fail; + + if (priv->hw_restart_in_progress) + return rc; + + rc = mwl8k_start(hw); + if (rc) + goto fail; + + rc = mwl8k_config(hw, ~0); + if (rc) + goto fail; + + for (i = 0; i < MWL8K_TX_WMM_QUEUES; i++) { + rc = mwl8k_conf_tx(hw, NULL, i, &priv->wmm_params[i]); + if (rc) + goto fail; + } + + return rc; + +fail: + printk(KERN_WARNING "mwl8k: Failed to reload firmware image.\n"); + return rc; +} + +static const struct ieee80211_iface_limit ap_if_limits[] = { + { .max = 8, .types = BIT(NL80211_IFTYPE_AP) }, + { .max = 1, .types = BIT(NL80211_IFTYPE_STATION) }, +}; + +static const struct ieee80211_iface_combination ap_if_comb = { + .limits = ap_if_limits, + .n_limits = ARRAY_SIZE(ap_if_limits), + .max_interfaces = 8, + .num_different_channels = 1, +}; + + +static int mwl8k_firmware_load_success(struct mwl8k_priv *priv) +{ + struct ieee80211_hw *hw = priv->hw; + int i, rc; + + rc = mwl8k_load_firmware(hw); + mwl8k_release_firmware(priv); + if (rc) { + wiphy_err(hw->wiphy, "Cannot start firmware\n"); + return rc; + } + + /* + * Extra headroom is the size of the required DMA header + * minus the size of the smallest 802.11 frame (CTS frame). + */ + hw->extra_tx_headroom = + sizeof(struct mwl8k_dma_data) - sizeof(struct ieee80211_cts); + + hw->extra_tx_headroom -= priv->ap_fw ? REDUCED_TX_HEADROOM : 0; + + hw->queues = MWL8K_TX_WMM_QUEUES; + + /* Set rssi values to dBm */ + ieee80211_hw_set(hw, SIGNAL_DBM); + ieee80211_hw_set(hw, HAS_RATE_CONTROL); + + /* + * Ask mac80211 to not to trigger PS mode + * based on PM bit of incoming frames. + */ + if (priv->ap_fw) + ieee80211_hw_set(hw, AP_LINK_PS); + + hw->vif_data_size = sizeof(struct mwl8k_vif); + hw->sta_data_size = sizeof(struct mwl8k_sta); + + priv->macids_used = 0; + INIT_LIST_HEAD(&priv->vif_list); + + /* Set default radio state and preamble */ + priv->radio_on = false; + priv->radio_short_preamble = false; + + /* Finalize join worker */ + INIT_WORK(&priv->finalize_join_worker, mwl8k_finalize_join_worker); + /* Handle watchdog ba events */ + INIT_WORK(&priv->watchdog_ba_handle, mwl8k_watchdog_ba_events); + /* To reload the firmware if it crashes */ + INIT_WORK(&priv->fw_reload, mwl8k_hw_restart_work); + + /* TX reclaim and RX tasklets. */ + tasklet_init(&priv->poll_tx_task, mwl8k_tx_poll, (unsigned long)hw); + tasklet_disable(&priv->poll_tx_task); + tasklet_init(&priv->poll_rx_task, mwl8k_rx_poll, (unsigned long)hw); + tasklet_disable(&priv->poll_rx_task); + + /* Power management cookie */ + priv->cookie = pci_alloc_consistent(priv->pdev, 4, &priv->cookie_dma); + if (priv->cookie == NULL) + return -ENOMEM; + + mutex_init(&priv->fw_mutex); + priv->fw_mutex_owner = NULL; + priv->fw_mutex_depth = 0; + priv->hostcmd_wait = NULL; + + spin_lock_init(&priv->tx_lock); + + spin_lock_init(&priv->stream_lock); + + priv->tx_wait = NULL; + + rc = mwl8k_probe_hw(hw); + if (rc) + goto err_free_cookie; + + hw->wiphy->interface_modes = 0; + + if (priv->ap_macids_supported || priv->device_info->fw_image_ap) { + hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP); + hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_STATION); + hw->wiphy->iface_combinations = &ap_if_comb; + hw->wiphy->n_iface_combinations = 1; + } + + if (priv->sta_macids_supported || priv->device_info->fw_image_sta) + hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_STATION); + + wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST); + + rc = ieee80211_register_hw(hw); + if (rc) { + wiphy_err(hw->wiphy, "Cannot register device\n"); + goto err_unprobe_hw; + } + + return 0; + +err_unprobe_hw: + for (i = 0; i < mwl8k_tx_queues(priv); i++) + mwl8k_txq_deinit(hw, i); + mwl8k_rxq_deinit(hw, 0); + +err_free_cookie: + if (priv->cookie != NULL) + pci_free_consistent(priv->pdev, 4, + priv->cookie, priv->cookie_dma); + + return rc; +} +static int mwl8k_probe(struct pci_dev *pdev, + const struct pci_device_id *id) +{ + static int printed_version; + struct ieee80211_hw *hw; + struct mwl8k_priv *priv; + struct mwl8k_device_info *di; + int rc; + + if (!printed_version) { + printk(KERN_INFO "%s version %s\n", MWL8K_DESC, MWL8K_VERSION); + printed_version = 1; + } + + + rc = pci_enable_device(pdev); + if (rc) { + printk(KERN_ERR "%s: Cannot enable new PCI device\n", + MWL8K_NAME); + return rc; + } + + rc = pci_request_regions(pdev, MWL8K_NAME); + if (rc) { + printk(KERN_ERR "%s: Cannot obtain PCI resources\n", + MWL8K_NAME); + goto err_disable_device; + } + + pci_set_master(pdev); + + + hw = ieee80211_alloc_hw(sizeof(*priv), &mwl8k_ops); + if (hw == NULL) { + printk(KERN_ERR "%s: ieee80211 alloc failed\n", MWL8K_NAME); + rc = -ENOMEM; + goto err_free_reg; + } + + SET_IEEE80211_DEV(hw, &pdev->dev); + pci_set_drvdata(pdev, hw); + + priv = hw->priv; + priv->hw = hw; + priv->pdev = pdev; + priv->device_info = &mwl8k_info_tbl[id->driver_data]; + + if (id->driver_data == MWL8764) + priv->is_8764 = true; + + priv->sram = pci_iomap(pdev, 0, 0x10000); + if (priv->sram == NULL) { + wiphy_err(hw->wiphy, "Cannot map device SRAM\n"); + rc = -EIO; + goto err_iounmap; + } + + /* + * If BAR0 is a 32 bit BAR, the register BAR will be BAR1. + * If BAR0 is a 64 bit BAR, the register BAR will be BAR2. + */ + priv->regs = pci_iomap(pdev, 1, 0x10000); + if (priv->regs == NULL) { + priv->regs = pci_iomap(pdev, 2, 0x10000); + if (priv->regs == NULL) { + wiphy_err(hw->wiphy, "Cannot map device registers\n"); + rc = -EIO; + goto err_iounmap; + } + } + + /* + * Choose the initial fw image depending on user input. If a second + * image is available, make it the alternative image that will be + * loaded if the first one fails. + */ + init_completion(&priv->firmware_loading_complete); + di = priv->device_info; + if (ap_mode_default && di->fw_image_ap) { + priv->fw_pref = di->fw_image_ap; + priv->fw_alt = di->fw_image_sta; + } else if (!ap_mode_default && di->fw_image_sta) { + priv->fw_pref = di->fw_image_sta; + priv->fw_alt = di->fw_image_ap; + } else if (ap_mode_default && !di->fw_image_ap && di->fw_image_sta) { + printk(KERN_WARNING "AP fw is unavailable. Using STA fw."); + priv->fw_pref = di->fw_image_sta; + } else if (!ap_mode_default && !di->fw_image_sta && di->fw_image_ap) { + printk(KERN_WARNING "STA fw is unavailable. Using AP fw."); + priv->fw_pref = di->fw_image_ap; + } + rc = mwl8k_init_firmware(hw, priv->fw_pref, true); + if (rc) + goto err_stop_firmware; + + priv->hw_restart_in_progress = false; + + priv->running_bsses = 0; + + return rc; + +err_stop_firmware: + mwl8k_hw_reset(priv); + +err_iounmap: + if (priv->regs != NULL) + pci_iounmap(pdev, priv->regs); + + if (priv->sram != NULL) + pci_iounmap(pdev, priv->sram); + + ieee80211_free_hw(hw); + +err_free_reg: + pci_release_regions(pdev); + +err_disable_device: + pci_disable_device(pdev); + + return rc; +} + +static void mwl8k_remove(struct pci_dev *pdev) +{ + struct ieee80211_hw *hw = pci_get_drvdata(pdev); + struct mwl8k_priv *priv; + int i; + + if (hw == NULL) + return; + priv = hw->priv; + + wait_for_completion(&priv->firmware_loading_complete); + + if (priv->fw_state == FW_STATE_ERROR) { + mwl8k_hw_reset(priv); + goto unmap; + } + + ieee80211_stop_queues(hw); + + ieee80211_unregister_hw(hw); + + /* Remove TX reclaim and RX tasklets. */ + tasklet_kill(&priv->poll_tx_task); + tasklet_kill(&priv->poll_rx_task); + + /* Stop hardware */ + mwl8k_hw_reset(priv); + + /* Return all skbs to mac80211 */ + for (i = 0; i < mwl8k_tx_queues(priv); i++) + mwl8k_txq_reclaim(hw, i, INT_MAX, 1); + + for (i = 0; i < mwl8k_tx_queues(priv); i++) + mwl8k_txq_deinit(hw, i); + + mwl8k_rxq_deinit(hw, 0); + + pci_free_consistent(priv->pdev, 4, priv->cookie, priv->cookie_dma); + +unmap: + pci_iounmap(pdev, priv->regs); + pci_iounmap(pdev, priv->sram); + ieee80211_free_hw(hw); + pci_release_regions(pdev); + pci_disable_device(pdev); +} + +static struct pci_driver mwl8k_driver = { + .name = MWL8K_NAME, + .id_table = mwl8k_pci_id_table, + .probe = mwl8k_probe, + .remove = mwl8k_remove, +}; + +module_pci_driver(mwl8k_driver); + +MODULE_DESCRIPTION(MWL8K_DESC); +MODULE_VERSION(MWL8K_VERSION); +MODULE_AUTHOR("Lennert Buytenhek <buytenh@marvell.com>"); +MODULE_LICENSE("GPL"); |