diff options
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl3945-base.c')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl3945-base.c | 148 |
1 files changed, 103 insertions, 45 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl3945-base.c b/drivers/net/wireless/iwlwifi/iwl3945-base.c index acefc3721267..617c4235d971 100644 --- a/drivers/net/wireless/iwlwifi/iwl3945-base.c +++ b/drivers/net/wireless/iwlwifi/iwl3945-base.c @@ -972,7 +972,7 @@ static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb) dma_addr_t phys_addr; dma_addr_t txcmd_phys; int txq_id = skb_get_queue_mapping(skb); - u16 len, idx, len_org, hdr_len; + u16 len, idx, len_org, hdr_len; /* TODO: len_org is not used */ u8 id; u8 unicast; u8 sta_id; @@ -1074,6 +1074,40 @@ static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb) /* Copy MAC header from skb into command buffer */ memcpy(tx->hdr, hdr, hdr_len); + + if (info->control.hw_key) + iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id); + + /* TODO need this for burst mode later on */ + iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id); + + /* set is_hcca to 0; it probably will never be implemented */ + iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0); + + /* Total # bytes to be transmitted */ + len = (u16)skb->len; + tx->len = cpu_to_le16(len); + + + tx->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK; + tx->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK; + + if (!ieee80211_has_morefrags(hdr->frame_control)) { + txq->need_update = 1; + if (qc) + priv->stations_39[sta_id].tid[tid].seq_number = seq_number; + } else { + wait_write_ptr = 1; + txq->need_update = 0; + } + + IWL_DEBUG_TX(priv, "sequence nr = 0X%x \n", + le16_to_cpu(out_cmd->hdr.sequence)); + IWL_DEBUG_TX(priv, "tx_flags = 0X%x \n", le32_to_cpu(tx->tx_flags)); + iwl_print_hex_dump(priv, IWL_DL_TX, tx, sizeof(*tx)); + iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx->hdr, + ieee80211_hdrlen(fc)); + /* * Use the first empty entry in this queue's command buffer array * to contain the Tx command and MAC header concatenated together @@ -1096,22 +1130,18 @@ static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb) /* Physical address of this Tx command's header (not MAC header!), * within command buffer array. */ - txcmd_phys = pci_map_single(priv->pci_dev, - out_cmd, sizeof(struct iwl_cmd), - PCI_DMA_TODEVICE); + txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr, + len, PCI_DMA_TODEVICE); + /* we do not map meta data ... so we can safely access address to + * provide to unmap command*/ pci_unmap_addr_set(&out_cmd->meta, mapping, txcmd_phys); - pci_unmap_len_set(&out_cmd->meta, len, sizeof(struct iwl_cmd)); - /* Add buffer containing Tx command and MAC(!) header to TFD's - * first entry */ - txcmd_phys += offsetof(struct iwl_cmd, hdr); + pci_unmap_len_set(&out_cmd->meta, len, len); /* Add buffer containing Tx command and MAC(!) header to TFD's * first entry */ priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq, txcmd_phys, len, 1, 0); - if (info->control.hw_key) - iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id); /* Set up TFD's 2nd entry to point directly to remainder of skb, * if any (802.11 null frames have no payload). */ @@ -1124,34 +1154,6 @@ static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb) 0, U32_PAD(len)); } - /* Total # bytes to be transmitted */ - len = (u16)skb->len; - tx->len = cpu_to_le16(len); - - /* TODO need this for burst mode later on */ - iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id); - - /* set is_hcca to 0; it probably will never be implemented */ - iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0); - - tx->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK; - tx->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK; - - if (!ieee80211_has_morefrags(hdr->frame_control)) { - txq->need_update = 1; - if (qc) - priv->stations_39[sta_id].tid[tid].seq_number = seq_number; - } else { - wait_write_ptr = 1; - txq->need_update = 0; - } - - IWL_DEBUG_TX(priv, "sequence nr = 0X%x \n", - le16_to_cpu(out_cmd->hdr.sequence)); - IWL_DEBUG_TX(priv, "tx_flags = 0X%x \n", le32_to_cpu(tx->tx_flags)); - iwl_print_hex_dump(priv, IWL_DL_TX, tx, sizeof(*tx)); - iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx->hdr, - ieee80211_hdrlen(fc)); /* Tell device the write index *just past* this latest filled TFD */ q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd); @@ -1663,6 +1665,37 @@ static void iwl3945_rx_allocate(struct iwl_priv *priv) spin_unlock_irqrestore(&rxq->lock, flags); } +void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq) +{ + unsigned long flags; + int i; + spin_lock_irqsave(&rxq->lock, flags); + INIT_LIST_HEAD(&rxq->rx_free); + INIT_LIST_HEAD(&rxq->rx_used); + /* Fill the rx_used queue with _all_ of the Rx buffers */ + for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) { + /* In the reset function, these buffers may have been allocated + * to an SKB, so we need to unmap and free potential storage */ + if (rxq->pool[i].skb != NULL) { + pci_unmap_single(priv->pci_dev, + rxq->pool[i].real_dma_addr, + priv->hw_params.rx_buf_size, + PCI_DMA_FROMDEVICE); + priv->alloc_rxb_skb--; + dev_kfree_skb(rxq->pool[i].skb); + rxq->pool[i].skb = NULL; + } + list_add_tail(&rxq->pool[i].list, &rxq->rx_used); + } + + /* Set us so that we have processed and used all buffers, but have + * not restocked the Rx queue with fresh buffers */ + rxq->read = rxq->write = 0; + rxq->free_count = 0; + spin_unlock_irqrestore(&rxq->lock, flags); +} +EXPORT_SYMBOL(iwl3945_rx_queue_reset); + /* * this should be called while priv->lock is locked */ @@ -1687,6 +1720,34 @@ void iwl3945_rx_replenish(void *data) spin_unlock_irqrestore(&priv->lock, flags); } +/* Assumes that the skb field of the buffers in 'pool' is kept accurate. + * If an SKB has been detached, the POOL needs to have its SKB set to NULL + * This free routine walks the list of POOL entries and if SKB is set to + * non NULL it is unmapped and freed + */ +static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq) +{ + int i; + for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) { + if (rxq->pool[i].skb != NULL) { + pci_unmap_single(priv->pci_dev, + rxq->pool[i].real_dma_addr, + priv->hw_params.rx_buf_size, + PCI_DMA_FROMDEVICE); + dev_kfree_skb(rxq->pool[i].skb); + } + } + + pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd, + rxq->dma_addr); + pci_free_consistent(priv->pci_dev, sizeof(struct iwl_rb_status), + rxq->rb_stts, rxq->rb_stts_dma); + rxq->bd = NULL; + rxq->rb_stts = NULL; +} +EXPORT_SYMBOL(iwl3945_rx_queue_free); + + /* Convert linear signal-to-noise ratio into dB */ static u8 ratio2dB[100] = { /* 0 1 2 3 4 5 6 7 8 9 */ @@ -1804,9 +1865,9 @@ static void iwl3945_rx_handle(struct iwl_priv *priv) rxq->queue[i] = NULL; - pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->real_dma_addr, - priv->hw_params.rx_buf_size, - PCI_DMA_FROMDEVICE); + pci_unmap_single(priv->pci_dev, rxb->real_dma_addr, + priv->hw_params.rx_buf_size, + PCI_DMA_FROMDEVICE); pkt = (struct iwl_rx_packet *)rxb->skb->data; /* Reclaim a command buffer only if this packet is a response @@ -1854,9 +1915,6 @@ static void iwl3945_rx_handle(struct iwl_priv *priv) rxb->skb = NULL; } - pci_unmap_single(priv->pci_dev, rxb->real_dma_addr, - priv->hw_params.rx_buf_size, - PCI_DMA_FROMDEVICE); spin_lock_irqsave(&rxq->lock, flags); list_add_tail(&rxb->list, &priv->rxq.rx_used); spin_unlock_irqrestore(&rxq->lock, flags); @@ -5203,7 +5261,7 @@ static void __devexit iwl3945_pci_remove(struct pci_dev *pdev) iwl3945_dealloc_ucode_pci(priv); if (priv->rxq.bd) - iwl_rx_queue_free(priv, &priv->rxq); + iwl3945_rx_queue_free(priv, &priv->rxq); iwl3945_hw_txq_ctx_free(priv); iwl3945_unset_hw_params(priv); |