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path: root/drivers/net/wireless/iwlwifi/iwl-tx.c
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Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-tx.c')
-rw-r--r--drivers/net/wireless/iwlwifi/iwl-tx.c68
1 files changed, 36 insertions, 32 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-tx.c b/drivers/net/wireless/iwlwifi/iwl-tx.c
index 277c9175dcf6..565980fbb591 100644
--- a/drivers/net/wireless/iwlwifi/iwl-tx.c
+++ b/drivers/net/wireless/iwlwifi/iwl-tx.c
@@ -1,6 +1,6 @@
/******************************************************************************
*
- * Copyright(c) 2003 - 2010 Intel Corporation. All rights reserved.
+ * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved.
*
* Portions of this file are derived from the ipw3945 project, as well
* as portions of the ieee80211 subsystem header files.
@@ -149,32 +149,31 @@ void iwl_cmd_queue_unmap(struct iwl_priv *priv)
struct iwl_tx_queue *txq = &priv->txq[priv->cmd_queue];
struct iwl_queue *q = &txq->q;
int i;
- bool huge = false;
if (q->n_bd == 0)
return;
while (q->read_ptr != q->write_ptr) {
- /* we have no way to tell if it is a huge cmd ATM */
i = get_cmd_index(q, q->read_ptr, 0);
- if (txq->meta[i].flags & CMD_SIZE_HUGE)
- huge = true;
- else
+ if (txq->meta[i].flags & CMD_MAPPED) {
pci_unmap_single(priv->pci_dev,
dma_unmap_addr(&txq->meta[i], mapping),
dma_unmap_len(&txq->meta[i], len),
PCI_DMA_BIDIRECTIONAL);
+ txq->meta[i].flags = 0;
+ }
- q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd);
+ q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd);
}
- if (huge) {
- i = q->n_window;
+ i = q->n_window;
+ if (txq->meta[i].flags & CMD_MAPPED) {
pci_unmap_single(priv->pci_dev,
dma_unmap_addr(&txq->meta[i], mapping),
dma_unmap_len(&txq->meta[i], len),
PCI_DMA_BIDIRECTIONAL);
+ txq->meta[i].flags = 0;
}
}
@@ -463,7 +462,11 @@ int iwl_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
return -EIO;
}
+ spin_lock_irqsave(&priv->hcmd_lock, flags);
+
if (iwl_queue_space(q) < ((cmd->flags & CMD_ASYNC) ? 2 : 1)) {
+ spin_unlock_irqrestore(&priv->hcmd_lock, flags);
+
IWL_ERR(priv, "No space in command queue\n");
if (priv->cfg->ops->lib->tt_ops.ct_kill_check) {
is_ct_kill =
@@ -471,27 +474,22 @@ int iwl_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
}
if (!is_ct_kill) {
IWL_ERR(priv, "Restarting adapter due to queue full\n");
- queue_work(priv->workqueue, &priv->restart);
+ iwlagn_fw_error(priv, false);
}
return -ENOSPC;
}
- spin_lock_irqsave(&priv->hcmd_lock, flags);
-
- /* If this is a huge cmd, mark the huge flag also on the meta.flags
- * of the _original_ cmd. This is used for DMA mapping clean up.
- */
- if (cmd->flags & CMD_SIZE_HUGE) {
- idx = get_cmd_index(q, q->write_ptr, 0);
- txq->meta[idx].flags = CMD_SIZE_HUGE;
- }
-
idx = get_cmd_index(q, q->write_ptr, cmd->flags & CMD_SIZE_HUGE);
out_cmd = txq->cmd[idx];
out_meta = &txq->meta[idx];
+ if (WARN_ON(out_meta->flags & CMD_MAPPED)) {
+ spin_unlock_irqrestore(&priv->hcmd_lock, flags);
+ return -ENOSPC;
+ }
+
memset(out_meta, 0, sizeof(*out_meta)); /* re-initialize to NULL */
- out_meta->flags = cmd->flags;
+ out_meta->flags = cmd->flags | CMD_MAPPED;
if (cmd->flags & CMD_WANT_SKB)
out_meta->source = cmd;
if (cmd->flags & CMD_ASYNC)
@@ -584,7 +582,7 @@ static void iwl_hcmd_queue_reclaim(struct iwl_priv *priv, int txq_id,
if (nfreed++ > 0) {
IWL_ERR(priv, "HCMD skipped: index (%d) %d %d\n", idx,
q->write_ptr, q->read_ptr);
- queue_work(priv->workqueue, &priv->restart);
+ iwlagn_fw_error(priv, false);
}
}
@@ -609,6 +607,10 @@ void iwl_tx_cmd_complete(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
struct iwl_device_cmd *cmd;
struct iwl_cmd_meta *meta;
struct iwl_tx_queue *txq = &priv->txq[priv->cmd_queue];
+ unsigned long flags;
+ void (*callback) (struct iwl_priv *priv, struct iwl_device_cmd *cmd,
+ struct iwl_rx_packet *pkt);
+
/* If a Tx command is being handled and it isn't in the actual
* command queue then there a command routing bug has been introduced
@@ -622,14 +624,8 @@ void iwl_tx_cmd_complete(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
return;
}
- /* If this is a huge cmd, clear the huge flag on the meta.flags
- * of the _original_ cmd. So that iwl_cmd_queue_free won't unmap
- * the DMA buffer for the scan (huge) command.
- */
- if (huge) {
- cmd_index = get_cmd_index(&txq->q, index, 0);
- txq->meta[cmd_index].flags = 0;
- }
+ spin_lock_irqsave(&priv->hcmd_lock, flags);
+
cmd_index = get_cmd_index(&txq->q, index, huge);
cmd = txq->cmd[cmd_index];
meta = &txq->meta[cmd_index];
@@ -639,12 +635,13 @@ void iwl_tx_cmd_complete(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
dma_unmap_len(meta, len),
PCI_DMA_BIDIRECTIONAL);
+ callback = NULL;
/* Input error checking is done when commands are added to queue. */
if (meta->flags & CMD_WANT_SKB) {
meta->source->reply_page = (unsigned long)rxb_addr(rxb);
rxb->page = NULL;
- } else if (meta->callback)
- meta->callback(priv, cmd, pkt);
+ } else
+ callback = meta->callback;
iwl_hcmd_queue_reclaim(priv, txq_id, index, cmd_index);
@@ -654,5 +651,12 @@ void iwl_tx_cmd_complete(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
get_cmd_string(cmd->hdr.cmd));
wake_up_interruptible(&priv->wait_command_queue);
}
+
+ /* Mark as unmapped */
meta->flags = 0;
+
+ spin_unlock_irqrestore(&priv->hcmd_lock, flags);
+
+ if (callback)
+ callback(priv, cmd, pkt);
}