Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
[linux-2.6.git] / drivers / net / wireless / iwlwifi / iwl3945-base.c
index a5efb3b..6b42ea2 100644 (file)
@@ -690,7 +690,7 @@ 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;
@@ -792,6 +792,40 @@ 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
@@ -814,22 +848,18 @@ 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). */
@@ -842,32 +872,6 @@ 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_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);
@@ -1379,6 +1383,36 @@ 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);
+}
+
 /*
  * this should be called while priv->lock is locked
  */
@@ -1403,6 +1437,33 @@ 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;
+}
+
+
 /* Convert linear signal-to-noise ratio into dB */
 static u8 ratio2dB[100] = {
 /*      0   1   2   3   4   5   6   7   8   9 */
@@ -1520,9 +1581,9 @@ 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
@@ -1571,9 +1632,6 @@ 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);
@@ -4424,12 +4482,12 @@ static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
        sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
 
        iwl_rfkill_unregister(priv);
-       cancel_delayed_work(&priv->rfkill_poll);
+       cancel_delayed_work_sync(&priv->rfkill_poll);
 
        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);