static inline void handle_regs_int(struct urb *urb) { struct zd_usb *usb = urb->context; struct zd_usb_interrupt *intr = &usb->intr; int len; u16 int_num; ZD_ASSERT(in_interrupt()); spin_lock(&intr->lock); int_num = le16_to_cpu(*(__le16 *)(urb->transfer_buffer+2)); if (int_num == CR_INTERRUPT) { struct zd_mac *mac = zd_hw_mac(zd_usb_to_hw(urb->context)); spin_lock(&mac->lock); memcpy(&mac->intr_buffer, urb->transfer_buffer, USB_MAX_EP_INT_BUFFER); spin_unlock(&mac->lock); schedule_work(&mac->process_intr); } else if (intr->read_regs_enabled) { intr->read_regs.length = len = urb->actual_length; if (len > sizeof(intr->read_regs.buffer)) len = sizeof(intr->read_regs.buffer); memcpy(intr->read_regs.buffer, urb->transfer_buffer, len); intr->read_regs_enabled = 0; complete(&intr->read_regs.completion); goto out; } out: spin_unlock(&intr->lock); }
static int zd_op_config_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_if_conf *conf) { struct zd_mac *mac = zd_hw_mac(hw); int associated; if (mac->type == IEEE80211_IF_TYPE_MESH_POINT) { associated = true; if (conf->beacon) { zd_mac_config_beacon(hw, conf->beacon); kfree_skb(conf->beacon); zd_set_beacon_interval(&mac->chip, BCN_MODE_IBSS | hw->conf.beacon_int); } } else associated = is_valid_ether_addr(conf->bssid); spin_lock_irq(&mac->lock); mac->associated = associated; spin_unlock_irq(&mac->lock); /* TODO: do hardware bssid filtering */ return 0; }
/** * zd_mac_tx_to_dev - callback for USB layer * @skb: a &sk_buff pointer * @error: error value, 0 if transmission successful * * Informs the MAC layer that the frame has successfully transferred to the * device. If an ACK is required and the transfer to the device has been * successful, the packets are put on the @ack_wait_queue with * the control set removed. */ void zd_mac_tx_to_dev(struct sk_buff *skb, int error) { struct zd_tx_skb_control_block *cb = (struct zd_tx_skb_control_block *)skb->cb; struct ieee80211_hw *hw = cb->hw; if (likely(cb->control)) { skb_pull(skb, sizeof(struct zd_ctrlset)); if (unlikely(error || (cb->control->flags & IEEE80211_TXCTL_NO_ACK))) { struct ieee80211_tx_status status; memset(&status, 0, sizeof(status)); tx_status(hw, skb, &status, !error); } else { struct sk_buff_head *q = &zd_hw_mac(hw)->ack_wait_queue; skb_queue_tail(q, skb); while (skb_queue_len(q) > ZD_MAC_MAX_ACK_WAITERS) zd_mac_tx_failed(hw); } } else { kfree_tx_skb(skb); } }
struct ieee80211_hw *zd_mac_alloc_hw(struct usb_interface *intf) { struct zd_mac *mac; struct ieee80211_hw *hw; int i; hw = ieee80211_alloc_hw(sizeof(struct zd_mac), &zd_ops); if (!hw) { dev_dbg_f(&intf->dev, "out of memory\n"); return NULL; } mac = zd_hw_mac(hw); memset(mac, 0, sizeof(*mac)); spin_lock_init(&mac->lock); mac->hw = hw; mac->type = IEEE80211_IF_TYPE_INVALID; memcpy(mac->channels, zd_channels, sizeof(zd_channels)); memcpy(mac->rates, zd_rates, sizeof(zd_rates)); mac->modes[0].mode = MODE_IEEE80211G; mac->modes[0].num_rates = ARRAY_SIZE(zd_rates); mac->modes[0].rates = mac->rates; mac->modes[0].num_channels = ARRAY_SIZE(zd_channels); mac->modes[0].channels = mac->channels; mac->modes[1].mode = MODE_IEEE80211B; mac->modes[1].num_rates = 4; mac->modes[1].rates = mac->rates; mac->modes[1].num_channels = ARRAY_SIZE(zd_channels); mac->modes[1].channels = mac->channels; hw->flags = IEEE80211_HW_RX_INCLUDES_FCS | IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED; hw->max_rssi = 100; hw->max_signal = 100; hw->queues = 1; hw->extra_tx_headroom = sizeof(struct zd_ctrlset); skb_queue_head_init(&mac->ack_wait_queue); for (i = 0; i < 2; i++) { if (ieee80211_register_hwmode(hw, &mac->modes[i])) { dev_dbg_f(&intf->dev, "cannot register hwmode\n"); ieee80211_free_hw(hw); return NULL; } } zd_chip_init(&mac->chip, hw, intf); housekeeping_init(mac); INIT_WORK(&mac->set_multicast_hash_work, set_multicast_hash_handler); INIT_WORK(&mac->set_rts_cts_work, set_rts_cts_work); INIT_WORK(&mac->set_rx_filter_work, set_rx_filter_handler); SET_IEEE80211_DEV(hw, &intf->dev); return hw; }
static void zd_op_remove_interface(struct ieee80211_hw *hw, struct ieee80211_if_init_conf *conf) { struct zd_mac *mac = zd_hw_mac(hw); mac->type = IEEE80211_IF_TYPE_INVALID; zd_write_mac_addr(&mac->chip, NULL); }
/** * filter_ack - filters incoming packets for acknowledgements * @dev: the mac80211 device * @rx_hdr: received header * @stats: the status for the received packet * * This functions looks for ACK packets and tries to match them with the * frames in the tx queue. If a match is found the frame will be dequeued and * the upper layers is informed about the successful transmission. If * mac80211 queues have been stopped and the number of frames still to be * transmitted is low the queues will be opened again. * * Returns 1 if the frame was an ACK, 0 if it was ignored. */ static int filter_ack(struct ieee80211_hw *hw, struct ieee80211_hdr *rx_hdr, struct ieee80211_rx_status *stats) { u16 fc = le16_to_cpu(rx_hdr->frame_control); struct sk_buff *skb; struct sk_buff_head *q; unsigned long flags; if ((fc & (IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) != (IEEE80211_FTYPE_CTL | IEEE80211_STYPE_ACK)) return 0; q = &zd_hw_mac(hw)->ack_wait_queue; spin_lock_irqsave(&q->lock, flags); for (skb = q->next; skb != (struct sk_buff *)q; skb = skb->next) { struct ieee80211_hdr *tx_hdr; tx_hdr = (struct ieee80211_hdr *)skb->data; if (likely(!compare_ether_addr(tx_hdr->addr2, rx_hdr->addr1))) { struct ieee80211_tx_status status; memset(&status, 0, sizeof(status)); status.flags = IEEE80211_TX_STATUS_ACK; status.ack_signal = stats->ssi; __skb_unlink(skb, q); tx_status(hw, skb, &status, 1); goto out; } } out: spin_unlock_irqrestore(&q->lock, flags); return 1; }
static void zd_op_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags, unsigned int *new_flags, int mc_count, struct dev_mc_list *mclist) { struct zd_mc_hash hash; struct zd_mac *mac = zd_hw_mac(hw); unsigned long flags; int i; /* Only deal with supported flags */ changed_flags &= SUPPORTED_FIF_FLAGS; *new_flags &= SUPPORTED_FIF_FLAGS; /* changed_flags is always populated but this driver * doesn't support all FIF flags so its possible we don't * need to do anything */ if (!changed_flags) return; if (*new_flags & (FIF_PROMISC_IN_BSS | FIF_ALLMULTI)) { zd_mc_add_all(&hash); } else { DECLARE_MAC_BUF(macbuf); zd_mc_clear(&hash); for (i = 0; i < mc_count; i++) { if (!mclist) break; dev_dbg_f(zd_mac_dev(mac), "mc addr %s\n", print_mac(macbuf, mclist->dmi_addr)); zd_mc_add_addr(&hash, mclist->dmi_addr); mclist = mclist->next; } } spin_lock_irqsave(&mac->lock, flags); mac->pass_failed_fcs = !!(*new_flags & FIF_FCSFAIL); mac->pass_ctrl = !!(*new_flags & FIF_CONTROL); mac->multicast_hash = hash; spin_unlock_irqrestore(&mac->lock, flags); queue_work(zd_workqueue, &mac->set_multicast_hash_work); if (changed_flags & FIF_CONTROL) queue_work(zd_workqueue, &mac->set_rx_filter_work); /* no handling required for FIF_OTHER_BSS as we don't currently * do BSSID filtering */ /* FIXME: in future it would be nice to enable the probe response * filter (so that the driver doesn't see them) until * FIF_BCN_PRBRESP_PROMISC is set. however due to atomicity here, we'd * have to schedule work to enable prbresp reception, which might * happen too late. For now we'll just listen and forward them all the * time. */ }
static int zd_op_config_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_if_conf *conf) { struct zd_mac *mac = zd_hw_mac(hw); spin_lock_irq(&mac->lock); mac->associated = is_valid_ether_addr(conf->bssid); spin_unlock_irq(&mac->lock); /* TODO: do hardware bssid filtering */ return 0; }
/** * zd_mac_tx_failed - callback for failed frames * @dev: the mac80211 wireless device * * This function is called if a frame couldn't be succesfully be * transferred. The first frame from the tx queue, will be selected and * reported as error to the upper layers. */ void zd_mac_tx_failed(struct ieee80211_hw *hw) { struct sk_buff_head *q = &zd_hw_mac(hw)->ack_wait_queue; struct sk_buff *skb; struct ieee80211_tx_status status; skb = skb_dequeue(q); if (skb == NULL) return; memset(&status, 0, sizeof(status)); tx_status(hw, skb, &status, 0); }
int zd_mac_preinit_hw(struct ieee80211_hw *hw) { int r; u8 addr[ETH_ALEN]; struct zd_mac *mac = zd_hw_mac(hw); r = zd_chip_read_mac_addr_fw(&mac->chip, addr); if (r) return r; SET_IEEE80211_PERM_ADDR(hw, addr); return 0; }
struct ieee80211_hw *zd_mac_alloc_hw(struct usb_interface *intf) { struct zd_mac *mac; struct ieee80211_hw *hw; hw = ieee80211_alloc_hw(sizeof(struct zd_mac), &zd_ops); if (!hw) { dev_dbg_f(&intf->dev, "out of memory\n"); return NULL; } mac = zd_hw_mac(hw); memset(mac, 0, sizeof(*mac)); spin_lock_init(&mac->lock); mac->hw = hw; mac->type = IEEE80211_IF_TYPE_INVALID; memcpy(mac->channels, zd_channels, sizeof(zd_channels)); memcpy(mac->rates, zd_rates, sizeof(zd_rates)); mac->band.n_bitrates = ARRAY_SIZE(zd_rates); mac->band.bitrates = mac->rates; mac->band.n_channels = ARRAY_SIZE(zd_channels); mac->band.channels = mac->channels; hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &mac->band; hw->flags = IEEE80211_HW_RX_INCLUDES_FCS | IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE; hw->max_rssi = 100; hw->max_signal = 100; hw->queues = 1; hw->extra_tx_headroom = sizeof(struct zd_ctrlset); skb_queue_head_init(&mac->ack_wait_queue); zd_chip_init(&mac->chip, hw, intf); housekeeping_init(mac); INIT_WORK(&mac->set_multicast_hash_work, set_multicast_hash_handler); INIT_WORK(&mac->set_rts_cts_work, set_rts_cts_work); INIT_WORK(&mac->set_rx_filter_work, set_rx_filter_handler); INIT_WORK(&mac->process_intr, zd_process_intr); SET_IEEE80211_DEV(hw, &intf->dev); return hw; }
static int zd_op_start(struct ieee80211_hw *hw) { struct zd_mac *mac = zd_hw_mac(hw); struct zd_chip *chip = &mac->chip; struct zd_usb *usb = &chip->usb; int r; if (!usb->initialized) { r = zd_usb_init_hw(usb); if (r) goto out; } r = zd_chip_enable_int(chip); if (r < 0) goto out; r = zd_chip_set_basic_rates(chip, CR_RATES_80211B | CR_RATES_80211G); if (r < 0) goto disable_int; r = set_rx_filter(mac); if (r) goto disable_int; r = set_mc_hash(mac); if (r) goto disable_int; r = zd_chip_switch_radio_on(chip); if (r < 0) goto disable_int; r = zd_chip_enable_rxtx(chip); if (r < 0) goto disable_radio; r = zd_chip_enable_hwint(chip); if (r < 0) goto disable_rxtx; housekeeping_enable(mac); return 0; disable_rxtx: zd_chip_disable_rxtx(chip); disable_radio: zd_chip_switch_radio_off(chip); disable_int: zd_chip_disable_int(chip); out: return r; }
/** * tx_urb_complete - completes the execution of an URB * @urb: a URB * * This function is called if the URB has been transferred to a device or an * error has happened. */ static void tx_urb_complete(struct urb *urb) { int r; struct sk_buff *skb; struct ieee80211_tx_info *info; struct zd_usb *usb; struct zd_usb_tx *tx; skb = (struct sk_buff *)urb->context; info = IEEE80211_SKB_CB(skb); /* * grab 'usb' pointer before handing off the skb (since * it might be freed by zd_mac_tx_to_dev or mac80211) */ usb = &zd_hw_mac(info->rate_driver_data[0])->chip.usb; tx = &usb->tx; switch (urb->status) { case 0: break; case -ESHUTDOWN: case -EINVAL: case -ENODEV: case -ENOENT: case -ECONNRESET: case -EPIPE: dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status); break; default: dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status); goto resubmit; } free_urb: skb_unlink(skb, &usb->tx.submitted_skbs); zd_mac_tx_to_dev(skb, urb->status); usb_free_urb(urb); tx_dec_submitted_urbs(usb); return; resubmit: usb_anchor_urb(urb, &tx->submitted); r = usb_submit_urb(urb, GFP_ATOMIC); if (r) { usb_unanchor_urb(urb); dev_dbg_f(urb_dev(urb), "error resubmit urb %p %d\n", urb, r); goto free_urb; } }
/** * zd_op_tx - transmits a network frame to the device * * @dev: mac80211 hardware device * @skb: socket buffer * @control: the control structure * * This function transmit an IEEE 802.11 network frame to the device. The * control block of the skbuff will be initialized. If necessary the incoming * mac80211 queues will be stopped. */ static int zd_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb, struct ieee80211_tx_control *control) { struct zd_mac *mac = zd_hw_mac(hw); int r; r = fill_ctrlset(mac, skb, control); if (r) return r; r = init_tx_skb_control_block(skb, hw, control); if (r) return r; r = zd_usb_tx(&mac->chip.usb, skb); if (r) { clear_tx_skb_control_block(skb); return r; } return 0; }
static int zd_op_add_interface(struct ieee80211_hw *hw, struct ieee80211_if_init_conf *conf) { struct zd_mac *mac = zd_hw_mac(hw); /* using IEEE80211_IF_TYPE_INVALID to indicate no mode selected */ if (mac->type != IEEE80211_IF_TYPE_INVALID) return -EOPNOTSUPP; switch (conf->type) { case IEEE80211_IF_TYPE_MNTR: case IEEE80211_IF_TYPE_STA: mac->type = conf->type; break; default: return -EOPNOTSUPP; } return zd_write_mac_addr(&mac->chip, conf->mac_addr); }
void zd_mac_config_beacon(struct ieee80211_hw *hw, struct sk_buff *beacon) { struct zd_mac *mac = zd_hw_mac(hw); u32 tmp, j = 0; /* 4 more bytes for tail CRC */ u32 full_len = beacon->len + 4; zd_iowrite32(&mac->chip, CR_BCN_FIFO_SEMAPHORE, 0); zd_ioread32(&mac->chip, CR_BCN_FIFO_SEMAPHORE, &tmp); while (tmp & 0x2) { zd_ioread32(&mac->chip, CR_BCN_FIFO_SEMAPHORE, &tmp); if ((++j % 100) == 0) { printk(KERN_ERR "CR_BCN_FIFO_SEMAPHORE not ready\n"); if (j >= 500) { printk(KERN_ERR "Giving up beacon config.\n"); return; } } msleep(1); } zd_iowrite32(&mac->chip, CR_BCN_FIFO, full_len - 1); if (zd_chip_is_zd1211b(&mac->chip)) zd_iowrite32(&mac->chip, CR_BCN_LENGTH, full_len - 1); for (j = 0 ; j < beacon->len; j++) zd_iowrite32(&mac->chip, CR_BCN_FIFO, *((u8 *)(beacon->data + j))); for (j = 0; j < 4; j++) zd_iowrite32(&mac->chip, CR_BCN_FIFO, 0x0); zd_iowrite32(&mac->chip, CR_BCN_FIFO_SEMAPHORE, 1); /* 802.11b/g 2.4G CCK 1Mb * 802.11a, not yet implemented, uses different values (see GPL vendor * driver) */ zd_iowrite32(&mac->chip, CR_BCN_PLCP_CFG, 0x00000400 | (full_len << 19)); }
static void zd_op_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_bss_conf *bss_conf, u32 changes) { struct zd_mac *mac = zd_hw_mac(hw); unsigned long flags; dev_dbg_f(zd_mac_dev(mac), "changes: %x\n", changes); if (changes & BSS_CHANGED_ERP_PREAMBLE) { spin_lock_irqsave(&mac->lock, flags); mac->short_preamble = bss_conf->use_short_preamble; if (!mac->updating_rts_rate) { mac->updating_rts_rate = 1; /* FIXME: should disable TX here, until work has * completed and RTS_CTS reg is updated */ queue_work(zd_workqueue, &mac->set_rts_cts_work); } spin_unlock_irqrestore(&mac->lock, flags); } }
int zd_mac_init_hw(struct ieee80211_hw *hw) { int r; struct zd_mac *mac = zd_hw_mac(hw); struct zd_chip *chip = &mac->chip; u8 default_regdomain; r = zd_chip_enable_int(chip); if (r) goto out; r = zd_chip_init_hw(chip); if (r) goto disable_int; ZD_ASSERT(!irqs_disabled()); r = zd_read_regdomain(chip, &default_regdomain); if (r) goto disable_int; spin_lock_irq(&mac->lock); mac->regdomain = mac->default_regdomain = default_regdomain; spin_unlock_irq(&mac->lock); /* We must inform the device that we are doing encryption/decryption in * software at the moment. */ r = zd_set_encryption_type(chip, ENC_SNIFFER); if (r) goto disable_int; zd_geo_init(hw, mac->regdomain); r = 0; disable_int: zd_chip_disable_int(chip); out: return r; }
static void zd_op_stop(struct ieee80211_hw *hw) { struct zd_mac *mac = zd_hw_mac(hw); struct zd_chip *chip = &mac->chip; struct sk_buff *skb; struct sk_buff_head *ack_wait_queue = &mac->ack_wait_queue; /* The order here deliberately is a little different from the open() * method, since we need to make sure there is no opportunity for RX * frames to be processed by mac80211 after we have stopped it. */ zd_chip_disable_rxtx(chip); housekeeping_disable(mac); flush_workqueue(zd_workqueue); zd_chip_disable_hwint(chip); zd_chip_switch_radio_off(chip); zd_chip_disable_int(chip); while ((skb = skb_dequeue(ack_wait_queue))) kfree_tx_skb(skb); }
int zd_mac_rx(struct ieee80211_hw *hw, const u8 *buffer, unsigned int length) { struct zd_mac *mac = zd_hw_mac(hw); struct ieee80211_rx_status stats; const struct rx_status *status; struct sk_buff *skb; int bad_frame = 0; u16 fc; bool is_qos, is_4addr, need_padding; if (length < ZD_PLCP_HEADER_SIZE + 10 /* IEEE80211_1ADDR_LEN */ + FCS_LEN + sizeof(struct rx_status)) return -EINVAL; memset(&stats, 0, sizeof(stats)); /* Note about pass_failed_fcs and pass_ctrl access below: * mac locking intentionally omitted here, as this is the only unlocked * reader and the only writer is configure_filter. Plus, if there were * any races accessing these variables, it wouldn't really matter. * If mac80211 ever provides a way for us to access filter flags * from outside configure_filter, we could improve on this. Also, this * situation may change once we implement some kind of DMA-into-skb * RX path. */ /* Caller has to ensure that length >= sizeof(struct rx_status). */ status = (struct rx_status *) (buffer + (length - sizeof(struct rx_status))); if (status->frame_status & ZD_RX_ERROR) { if (mac->pass_failed_fcs && (status->frame_status & ZD_RX_CRC32_ERROR)) { stats.flag |= RX_FLAG_FAILED_FCS_CRC; bad_frame = 1; } else { return -EINVAL; } } stats.channel = _zd_chip_get_channel(&mac->chip); stats.freq = zd_channels[stats.channel - 1].freq; stats.phymode = MODE_IEEE80211G; stats.ssi = status->signal_strength; stats.signal = zd_rx_qual_percent(buffer, length - sizeof(struct rx_status), status); stats.rate = zd_rx_rate(buffer, status); length -= ZD_PLCP_HEADER_SIZE + sizeof(struct rx_status); buffer += ZD_PLCP_HEADER_SIZE; /* Except for bad frames, filter each frame to see if it is an ACK, in * which case our internal TX tracking is updated. Normally we then * bail here as there's no need to pass ACKs on up to the stack, but * there is also the case where the stack has requested us to pass * control frames on up (pass_ctrl) which we must consider. */ if (!bad_frame && filter_ack(hw, (struct ieee80211_hdr *)buffer, &stats) && !mac->pass_ctrl) return 0; fc = le16_to_cpu(*((__le16 *) buffer)); is_qos = ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) && ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_QOS_DATA); is_4addr = (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS); need_padding = is_qos ^ is_4addr; skb = dev_alloc_skb(length + (need_padding ? 2 : 0)); if (skb == NULL) return -ENOMEM; if (need_padding) { /* Make sure the the payload data is 4 byte aligned. */ skb_reserve(skb, 2); } memcpy(skb_put(skb, length), buffer, length); ieee80211_rx_irqsafe(hw, skb, &stats); return 0; }
static int zd_op_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf) { struct zd_mac *mac = zd_hw_mac(hw); return zd_chip_set_channel(&mac->chip, conf->channel); }