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iwlwifi: TX update chicken bits 

This instructs FH to increment the retry count of a packet when
it is brought from the memory to TX-FIFO to save transactions
during aggregation flow.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Winkler, Tomas 2008-11-19 15:32:27 -08:00 committed by John W. Linville
parent 31a73fe4f3
commit 40fc95d57c
3 changed files with 17 additions and 0 deletions
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6
drivers/net/wireless/iwlwifi/iwl-4965.c
View File

@ -695,6 +695,7 @@ static int iwl4965_alive_notify(struct iwl_priv *priv)
unsigned long flags;
int ret;
int i, chan;
u32 reg_val;
spin_lock_irqsave(&priv->lock, flags);
@ -724,6 +725,11 @@ static int iwl4965_alive_notify(struct iwl_priv *priv)
FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE);
/* Update FH chicken bits */
reg_val = iwl_read_direct32(priv, FH_TX_CHICKEN_BITS_REG);
iwl_write_direct32(priv, FH_TX_CHICKEN_BITS_REG,
reg_val | FH_TX_CHICKEN_BITS_SCD_AUTO_RETRY_EN);
/* Disable chain mode for all queues */
iwl_write_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, 0);

6
drivers/net/wireless/iwlwifi/iwl-5000.c
View File

@ -703,6 +703,7 @@ static int iwl5000_alive_notify(struct iwl_priv *priv)
unsigned long flags;
int ret;
int i, chan;
u32 reg_val;
spin_lock_irqsave(&priv->lock, flags);
@ -732,6 +733,11 @@ static int iwl5000_alive_notify(struct iwl_priv *priv)
FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE);
/* Update FH chicken bits */
reg_val = iwl_read_direct32(priv, FH_TX_CHICKEN_BITS_REG);
iwl_write_direct32(priv, FH_TX_CHICKEN_BITS_REG,
reg_val | FH_TX_CHICKEN_BITS_SCD_AUTO_RETRY_EN);
iwl_write_prph(priv, IWL50_SCD_QUEUECHAIN_SEL,
IWL50_SCD_QUEUECHAIN_SEL_ALL(priv->hw_params.max_txq_num));
iwl_write_prph(priv, IWL50_SCD_AGGR_SEL, 0);

5
drivers/net/wireless/iwlwifi/iwl-fh.h
View File

@ -396,6 +396,11 @@
#define FH_SRVC_CHNL_SRAM_ADDR_REG(_chnl) \
(FH_SRVC_LOWER_BOUND + ((_chnl) - 9) * 0x4)
#define FH_TX_CHICKEN_BITS_REG (FH_MEM_LOWER_BOUND + 0xE98)
/* Instruct FH to increment the retry count of a packet when
* it is brought from the memory to TX-FIFO
*/
#define FH_TX_CHICKEN_BITS_SCD_AUTO_RETRY_EN (0x00000002)
/**
* struct iwl_rb_status - reseve buffer status