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>
diff --git a/drivers/net/wireless/iwlwifi/iwl-4965.c b/drivers/net/wireless/iwlwifi/iwl-4965.c
index 60769b1..ab0b4053 100644
--- a/drivers/net/wireless/iwlwifi/iwl-4965.c
+++ b/drivers/net/wireless/iwlwifi/iwl-4965.c
@@ -695,6 +695,7 @@
unsigned long flags;
int ret;
int i, chan;
+ u32 reg_val;
spin_lock_irqsave(&priv->lock, flags);
@@ -724,6 +725,11 @@
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);
diff --git a/drivers/net/wireless/iwlwifi/iwl-5000.c b/drivers/net/wireless/iwlwifi/iwl-5000.c
index d73760c..a738886 100644
--- a/drivers/net/wireless/iwlwifi/iwl-5000.c
+++ b/drivers/net/wireless/iwlwifi/iwl-5000.c
@@ -703,6 +703,7 @@
unsigned long flags;
int ret;
int i, chan;
+ u32 reg_val;
spin_lock_irqsave(&priv->lock, flags);
@@ -732,6 +733,11 @@
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);
diff --git a/drivers/net/wireless/iwlwifi/iwl-fh.h b/drivers/net/wireless/iwlwifi/iwl-fh.h
index bc20acb..c3dadb0 100644
--- a/drivers/net/wireless/iwlwifi/iwl-fh.h
+++ b/drivers/net/wireless/iwlwifi/iwl-fh.h
@@ -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