diff options
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-agn.c')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-agn.c | 354 |
1 files changed, 0 insertions, 354 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.c b/drivers/net/wireless/iwlwifi/iwl-agn.c index c2a124131ef9..bd85af91c58a 100644 --- a/drivers/net/wireless/iwlwifi/iwl-agn.c +++ b/drivers/net/wireless/iwlwifi/iwl-agn.c @@ -457,346 +457,6 @@ static void iwl_bg_tx_flush(struct work_struct *work) iwlagn_dev_txfifo_flush(priv, IWL_DROP_ALL); } -/** - * iwl_rx_handle - Main entry function for receiving responses from uCode - * - * Uses the priv->rx_handlers callback function array to invoke - * the appropriate handlers, including command responses, - * frame-received notifications, and other notifications. - */ -static void iwl_rx_handle(struct iwl_priv *priv) -{ - struct iwl_rx_mem_buffer *rxb; - struct iwl_rx_packet *pkt; - struct iwl_rx_queue *rxq = &priv->rxq; - u32 r, i; - int reclaim; - unsigned long flags; - u8 fill_rx = 0; - u32 count = 8; - int total_empty; - - /* uCode's read index (stored in shared DRAM) indicates the last Rx - * buffer that the driver may process (last buffer filled by ucode). */ - r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF; - i = rxq->read; - - /* Rx interrupt, but nothing sent from uCode */ - if (i == r) - IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i); - - /* calculate total frames need to be restock after handling RX */ - total_empty = r - rxq->write_actual; - if (total_empty < 0) - total_empty += RX_QUEUE_SIZE; - - if (total_empty > (RX_QUEUE_SIZE / 2)) - fill_rx = 1; - - while (i != r) { - int len; - - rxb = rxq->queue[i]; - - /* If an RXB doesn't have a Rx queue slot associated with it, - * then a bug has been introduced in the queue refilling - * routines -- catch it here */ - if (WARN_ON(rxb == NULL)) { - i = (i + 1) & RX_QUEUE_MASK; - continue; - } - - rxq->queue[i] = NULL; - - dma_unmap_page(priv->bus.dev, rxb->page_dma, - PAGE_SIZE << priv->hw_params.rx_page_order, - DMA_FROM_DEVICE); - pkt = rxb_addr(rxb); - - IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r, - i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd); - - len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK; - len += sizeof(u32); /* account for status word */ - trace_iwlwifi_dev_rx(priv, pkt, len); - - /* Reclaim a command buffer only if this packet is a response - * to a (driver-originated) command. - * If the packet (e.g. Rx frame) originated from uCode, - * there is no command buffer to reclaim. - * Ucode should set SEQ_RX_FRAME bit if ucode-originated, - * but apparently a few don't get set; catch them here. */ - reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) && - (pkt->hdr.cmd != REPLY_RX_PHY_CMD) && - (pkt->hdr.cmd != REPLY_RX) && - (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) && - (pkt->hdr.cmd != REPLY_COMPRESSED_BA) && - (pkt->hdr.cmd != STATISTICS_NOTIFICATION) && - (pkt->hdr.cmd != REPLY_TX); - - iwl_rx_dispatch(priv, rxb); - - /* - * XXX: After here, we should always check rxb->page - * against NULL before touching it or its virtual - * memory (pkt). Because some rx_handler might have - * already taken or freed the pages. - */ - - if (reclaim) { - /* Invoke any callbacks, transfer the buffer to caller, - * and fire off the (possibly) blocking - * trans_send_cmd() - * as we reclaim the driver command queue */ - if (rxb->page) - iwl_tx_cmd_complete(priv, rxb); - else - IWL_WARN(priv, "Claim null rxb?\n"); - } - - /* Reuse the page if possible. For notification packets and - * SKBs that fail to Rx correctly, add them back into the - * rx_free list for reuse later. */ - spin_lock_irqsave(&rxq->lock, flags); - if (rxb->page != NULL) { - rxb->page_dma = dma_map_page(priv->bus.dev, rxb->page, - 0, PAGE_SIZE << priv->hw_params.rx_page_order, - DMA_FROM_DEVICE); - list_add_tail(&rxb->list, &rxq->rx_free); - rxq->free_count++; - } else - list_add_tail(&rxb->list, &rxq->rx_used); - - spin_unlock_irqrestore(&rxq->lock, flags); - - i = (i + 1) & RX_QUEUE_MASK; - /* If there are a lot of unused frames, - * restock the Rx queue so ucode wont assert. */ - if (fill_rx) { - count++; - if (count >= 8) { - rxq->read = i; - iwlagn_rx_replenish_now(priv); - count = 0; - } - } - } - - /* Backtrack one entry */ - rxq->read = i; - if (fill_rx) - iwlagn_rx_replenish_now(priv); - else - iwlagn_rx_queue_restock(priv); -} - -/* tasklet for iwlagn interrupt */ -void iwl_irq_tasklet(struct iwl_priv *priv) -{ - u32 inta = 0; - u32 handled = 0; - unsigned long flags; - u32 i; -#ifdef CONFIG_IWLWIFI_DEBUG - u32 inta_mask; -#endif - - spin_lock_irqsave(&priv->lock, flags); - - /* Ack/clear/reset pending uCode interrupts. - * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS, - */ - /* There is a hardware bug in the interrupt mask function that some - * interrupts (i.e. CSR_INT_BIT_SCD) can still be generated even if - * they are disabled in the CSR_INT_MASK register. Furthermore the - * ICT interrupt handling mechanism has another bug that might cause - * these unmasked interrupts fail to be detected. We workaround the - * hardware bugs here by ACKing all the possible interrupts so that - * interrupt coalescing can still be achieved. - */ - iwl_write32(priv, CSR_INT, priv->_agn.inta | ~priv->inta_mask); - - inta = priv->_agn.inta; - -#ifdef CONFIG_IWLWIFI_DEBUG - if (iwl_get_debug_level(priv) & IWL_DL_ISR) { - /* just for debug */ - inta_mask = iwl_read32(priv, CSR_INT_MASK); - IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x\n ", - inta, inta_mask); - } -#endif - - spin_unlock_irqrestore(&priv->lock, flags); - - /* saved interrupt in inta variable now we can reset priv->_agn.inta */ - priv->_agn.inta = 0; - - /* Now service all interrupt bits discovered above. */ - if (inta & CSR_INT_BIT_HW_ERR) { - IWL_ERR(priv, "Hardware error detected. Restarting.\n"); - - /* Tell the device to stop sending interrupts */ - iwl_disable_interrupts(priv); - - priv->isr_stats.hw++; - iwl_irq_handle_error(priv); - - handled |= CSR_INT_BIT_HW_ERR; - - return; - } - -#ifdef CONFIG_IWLWIFI_DEBUG - if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) { - /* NIC fires this, but we don't use it, redundant with WAKEUP */ - if (inta & CSR_INT_BIT_SCD) { - IWL_DEBUG_ISR(priv, "Scheduler finished to transmit " - "the frame/frames.\n"); - priv->isr_stats.sch++; - } - - /* Alive notification via Rx interrupt will do the real work */ - if (inta & CSR_INT_BIT_ALIVE) { - IWL_DEBUG_ISR(priv, "Alive interrupt\n"); - priv->isr_stats.alive++; - } - } -#endif - /* Safely ignore these bits for debug checks below */ - inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE); - - /* HW RF KILL switch toggled */ - if (inta & CSR_INT_BIT_RF_KILL) { - int hw_rf_kill = 0; - if (!(iwl_read32(priv, CSR_GP_CNTRL) & - CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)) - hw_rf_kill = 1; - - IWL_WARN(priv, "RF_KILL bit toggled to %s.\n", - hw_rf_kill ? "disable radio" : "enable radio"); - - priv->isr_stats.rfkill++; - - /* driver only loads ucode once setting the interface up. - * the driver allows loading the ucode even if the radio - * is killed. Hence update the killswitch state here. The - * rfkill handler will care about restarting if needed. - */ - if (!test_bit(STATUS_ALIVE, &priv->status)) { - if (hw_rf_kill) - set_bit(STATUS_RF_KILL_HW, &priv->status); - else - clear_bit(STATUS_RF_KILL_HW, &priv->status); - wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill); - } - - handled |= CSR_INT_BIT_RF_KILL; - } - - /* Chip got too hot and stopped itself */ - if (inta & CSR_INT_BIT_CT_KILL) { - IWL_ERR(priv, "Microcode CT kill error detected.\n"); - priv->isr_stats.ctkill++; - handled |= CSR_INT_BIT_CT_KILL; - } - - /* Error detected by uCode */ - if (inta & CSR_INT_BIT_SW_ERR) { - IWL_ERR(priv, "Microcode SW error detected. " - " Restarting 0x%X.\n", inta); - priv->isr_stats.sw++; - iwl_irq_handle_error(priv); - handled |= CSR_INT_BIT_SW_ERR; - } - - /* uCode wakes up after power-down sleep */ - if (inta & CSR_INT_BIT_WAKEUP) { - IWL_DEBUG_ISR(priv, "Wakeup interrupt\n"); - iwl_rx_queue_update_write_ptr(priv, &priv->rxq); - for (i = 0; i < priv->hw_params.max_txq_num; i++) - iwl_txq_update_write_ptr(priv, &priv->txq[i]); - - priv->isr_stats.wakeup++; - - handled |= CSR_INT_BIT_WAKEUP; - } - - /* All uCode command responses, including Tx command responses, - * Rx "responses" (frame-received notification), and other - * notifications from uCode come through here*/ - if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX | - CSR_INT_BIT_RX_PERIODIC)) { - IWL_DEBUG_ISR(priv, "Rx interrupt\n"); - if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) { - handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX); - iwl_write32(priv, CSR_FH_INT_STATUS, - CSR_FH_INT_RX_MASK); - } - if (inta & CSR_INT_BIT_RX_PERIODIC) { - handled |= CSR_INT_BIT_RX_PERIODIC; - iwl_write32(priv, CSR_INT, CSR_INT_BIT_RX_PERIODIC); - } - /* Sending RX interrupt require many steps to be done in the - * the device: - * 1- write interrupt to current index in ICT table. - * 2- dma RX frame. - * 3- update RX shared data to indicate last write index. - * 4- send interrupt. - * This could lead to RX race, driver could receive RX interrupt - * but the shared data changes does not reflect this; - * periodic interrupt will detect any dangling Rx activity. - */ - - /* Disable periodic interrupt; we use it as just a one-shot. */ - iwl_write8(priv, CSR_INT_PERIODIC_REG, - CSR_INT_PERIODIC_DIS); - iwl_rx_handle(priv); - - /* - * Enable periodic interrupt in 8 msec only if we received - * real RX interrupt (instead of just periodic int), to catch - * any dangling Rx interrupt. If it was just the periodic - * interrupt, there was no dangling Rx activity, and no need - * to extend the periodic interrupt; one-shot is enough. - */ - if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) - iwl_write8(priv, CSR_INT_PERIODIC_REG, - CSR_INT_PERIODIC_ENA); - - priv->isr_stats.rx++; - } - - /* This "Tx" DMA channel is used only for loading uCode */ - if (inta & CSR_INT_BIT_FH_TX) { - iwl_write32(priv, CSR_FH_INT_STATUS, CSR_FH_INT_TX_MASK); - IWL_DEBUG_ISR(priv, "uCode load interrupt\n"); - priv->isr_stats.tx++; - handled |= CSR_INT_BIT_FH_TX; - /* Wake up uCode load routine, now that load is complete */ - priv->ucode_write_complete = 1; - wake_up_interruptible(&priv->wait_command_queue); - } - - if (inta & ~handled) { - IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled); - priv->isr_stats.unhandled++; - } - - if (inta & ~(priv->inta_mask)) { - IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n", - inta & ~priv->inta_mask); - } - - /* Re-enable all interrupts */ - /* only Re-enable if disabled by irq */ - if (test_bit(STATUS_INT_ENABLED, &priv->status)) - iwl_enable_interrupts(priv); - /* Re-enable RF_KILL if it occurred */ - else if (handled & CSR_INT_BIT_RF_KILL) - iwl_enable_rfkill_int(priv); -} - /***************************************************************************** * * sysfs attributes @@ -2321,19 +1981,6 @@ static void iwl_bg_restart(struct work_struct *data) } } -static void iwl_bg_rx_replenish(struct work_struct *data) -{ - struct iwl_priv *priv = - container_of(data, struct iwl_priv, rx_replenish); - - if (test_bit(STATUS_EXIT_PENDING, &priv->status)) - return; - - mutex_lock(&priv->mutex); - iwlagn_rx_replenish(priv); - mutex_unlock(&priv->mutex); -} - static int iwl_mac_offchannel_tx(struct ieee80211_hw *hw, struct sk_buff *skb, struct ieee80211_channel *chan, enum nl80211_channel_type channel_type, @@ -3188,7 +2835,6 @@ static void iwl_setup_deferred_work(struct iwl_priv *priv) init_waitqueue_head(&priv->wait_command_queue); INIT_WORK(&priv->restart, iwl_bg_restart); - INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish); INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update); INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work); INIT_WORK(&priv->tx_flush, iwl_bg_tx_flush); |