From da1bc4539f9b10dc30ac1750fbaaf5afae4b3446 Mon Sep 17 00:00:00 2001 From: Tomas Winkler Date: Thu, 29 May 2008 16:35:00 +0800 Subject: iwlwifi: move txq_ctx_stop into iwl-tx.c This patch moves txq_ctx_stop into iwl-tx.c iwlcore module. Signed-off-by: Tomas Winkler Signed-off-by: John W. Linville --- drivers/net/wireless/iwlwifi/iwl-tx.c | 88 ++++++++++++++++++++++++++--------- 1 file changed, 65 insertions(+), 23 deletions(-) (limited to 'drivers/net/wireless/iwlwifi/iwl-tx.c') diff --git a/drivers/net/wireless/iwlwifi/iwl-tx.c b/drivers/net/wireless/iwlwifi/iwl-tx.c index 0ebab967d5e..0b822b5ab52 100644 --- a/drivers/net/wireless/iwlwifi/iwl-tx.c +++ b/drivers/net/wireless/iwlwifi/iwl-tx.c @@ -262,24 +262,6 @@ int iwl_queue_space(const struct iwl_queue *q) EXPORT_SYMBOL(iwl_queue_space); -/** - * iwl_hw_txq_ctx_free - Free TXQ Context - * - * Destroy all TX DMA queues and structures - */ -void iwl_hw_txq_ctx_free(struct iwl_priv *priv) -{ - int txq_id; - - /* Tx queues */ - for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++) - iwl_tx_queue_free(priv, &priv->txq[txq_id]); - - /* Keep-warm buffer */ - iwl_kw_free(priv); -} -EXPORT_SYMBOL(iwl_hw_txq_ctx_free); - /** * iwl_queue_init - Initialize queue's high/low-water and read/write indexes */ @@ -437,6 +419,24 @@ static int iwl_tx_queue_init(struct iwl_priv *priv, return 0; } +/** + * iwl_hw_txq_ctx_free - Free TXQ Context + * + * Destroy all TX DMA queues and structures + */ +void iwl_hw_txq_ctx_free(struct iwl_priv *priv) +{ + int txq_id; + + /* Tx queues */ + for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++) + iwl_tx_queue_free(priv, &priv->txq[txq_id]); + + /* Keep-warm buffer */ + iwl_kw_free(priv); +} +EXPORT_SYMBOL(iwl_hw_txq_ctx_free); + /** * iwl_txq_ctx_reset - Reset TX queue context @@ -449,6 +449,7 @@ int iwl_txq_ctx_reset(struct iwl_priv *priv) { int ret = 0; int txq_id, slots_num; + unsigned long flags; iwl_kw_free(priv); @@ -461,11 +462,19 @@ int iwl_txq_ctx_reset(struct iwl_priv *priv) IWL_ERROR("Keep Warm allocation failed"); goto error_kw; } + spin_lock_irqsave(&priv->lock, flags); + ret = iwl_grab_nic_access(priv); + if (unlikely(ret)) { + spin_unlock_irqrestore(&priv->lock, flags); + goto error_reset; + } /* Turn off all Tx DMA fifos */ - ret = priv->cfg->ops->lib->disable_tx_fifo(priv); - if (unlikely(ret)) - goto error_reset; + priv->cfg->ops->lib->txq_set_sched(priv, 0); + + iwl_release_nic_access(priv); + spin_unlock_irqrestore(&priv->lock, flags); + /* Tell nic where to find the keep-warm buffer */ ret = iwl_kw_init(priv); @@ -474,8 +483,7 @@ int iwl_txq_ctx_reset(struct iwl_priv *priv) goto error_reset; } - /* Alloc and init all (default 16) Tx queues, - * including the command queue (#4) */ + /* Alloc and init all Tx queues, including the command queue (#4) */ for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++) { slots_num = (txq_id == IWL_CMD_QUEUE_NUM) ? TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS; @@ -496,6 +504,40 @@ int iwl_txq_ctx_reset(struct iwl_priv *priv) error_kw: return ret; } +/** + * iwl_txq_ctx_stop - Stop all Tx DMA channels, free Tx queue memory + */ +void iwl_txq_ctx_stop(struct iwl_priv *priv) +{ + + int txq_id; + unsigned long flags; + + + /* Turn off all Tx DMA fifos */ + spin_lock_irqsave(&priv->lock, flags); + if (iwl_grab_nic_access(priv)) { + spin_unlock_irqrestore(&priv->lock, flags); + return; + } + + priv->cfg->ops->lib->txq_set_sched(priv, 0); + + /* Stop each Tx DMA channel, and wait for it to be idle */ + for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++) { + iwl_write_direct32(priv, + FH_TCSR_CHNL_TX_CONFIG_REG(txq_id), 0x0); + iwl_poll_direct_bit(priv, FH_TSSR_TX_STATUS_REG, + FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE + (txq_id), 200); + } + iwl_release_nic_access(priv); + spin_unlock_irqrestore(&priv->lock, flags); + + /* Deallocate memory for all Tx queues */ + iwl_hw_txq_ctx_free(priv); +} +EXPORT_SYMBOL(iwl_txq_ctx_stop); /* * handle build REPLY_TX command notification. -- cgit v1.2.3