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authorWey-Yi Guy <wey-yi.w.guy@intel.com>2010-01-15 13:43:37 -0800
committerJohn W. Linville <linville@tuxdriver.com>2010-01-19 16:25:11 -0500
commit2be76703a3afb281155894ac52d34f7f5d736633 (patch)
tree2eccad07339ac4d116cde6d3d9c710ead048b42a /drivers/net/wireless
parent937c397eb633b804d9a806d08c395ecfc42b1fec (diff)
iwlwifi: set interrupt coalescing timer range and default
For interrupt coalescing timer, the CSR_INT_COALESCING is an 8 bit register in 32-usec unit, the range can go from 0x00 - 0xFF. set the range and default timeout value for both calibration mode and operation mode. Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless')
-rw-r--r--drivers/net/wireless/iwlwifi/iwl-core.c4
-rw-r--r--drivers/net/wireless/iwlwifi/iwl-dev.h15
-rw-r--r--drivers/net/wireless/iwlwifi/iwl-rx.c4
3 files changed, 19 insertions, 4 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-core.c b/drivers/net/wireless/iwlwifi/iwl-core.c
index 5b56307a381..29eb7b4dc7d 100644
--- a/drivers/net/wireless/iwlwifi/iwl-core.c
+++ b/drivers/net/wireless/iwlwifi/iwl-core.c
@@ -257,8 +257,8 @@ int iwl_hw_nic_init(struct iwl_priv *priv)
spin_lock_irqsave(&priv->lock, flags);
priv->cfg->ops->lib->apm_ops.init(priv);
- /* Set interrupt coalescing timer to 512 usecs */
- iwl_write8(priv, CSR_INT_COALESCING, 512 / 32);
+ /* Set interrupt coalescing calibration timer to default (512 usecs) */
+ iwl_write8(priv, CSR_INT_COALESCING, IWL_HOST_INT_CALIB_TIMEOUT_DEF);
spin_unlock_irqrestore(&priv->lock, flags);
diff --git a/drivers/net/wireless/iwlwifi/iwl-dev.h b/drivers/net/wireless/iwlwifi/iwl-dev.h
index 63e45cd3f63..251eb737860 100644
--- a/drivers/net/wireless/iwlwifi/iwl-dev.h
+++ b/drivers/net/wireless/iwlwifi/iwl-dev.h
@@ -1011,6 +1011,21 @@ struct iwl_event_log {
int wraps_more_count;
};
+/*
+ * host interrupt timeout value
+ * used with setting interrupt coalescing timer
+ * the CSR_INT_COALESCING is an 8 bit register in 32-usec unit
+ *
+ * default interrupt coalescing timer is 64 x 32 = 2048 usecs
+ * default interrupt coalescing calibration timer is 16 x 32 = 512 usecs
+ */
+#define IWL_HOST_INT_TIMEOUT_MAX (0xFF)
+#define IWL_HOST_INT_TIMEOUT_DEF (0x40)
+#define IWL_HOST_INT_TIMEOUT_MIN (0x0)
+#define IWL_HOST_INT_CALIB_TIMEOUT_MAX (0xFF)
+#define IWL_HOST_INT_CALIB_TIMEOUT_DEF (0x10)
+#define IWL_HOST_INT_CALIB_TIMEOUT_MIN (0x0)
+
struct iwl_priv {
/* ieee device used by generic ieee processing code */
diff --git a/drivers/net/wireless/iwlwifi/iwl-rx.c b/drivers/net/wireless/iwlwifi/iwl-rx.c
index 5bbe5f1f749..07bdba93c17 100644
--- a/drivers/net/wireless/iwlwifi/iwl-rx.c
+++ b/drivers/net/wireless/iwlwifi/iwl-rx.c
@@ -473,8 +473,8 @@ int iwl_rx_init(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
(rb_timeout << FH_RCSR_RX_CONFIG_REG_IRQ_RBTH_POS)|
(rfdnlog << FH_RCSR_RX_CONFIG_RBDCB_SIZE_POS));
- /* Set interrupt coalescing timer to 64 x 32 = 2048 usecs */
- iwl_write8(priv, CSR_INT_COALESCING, 0x40);
+ /* Set interrupt coalescing timer to default (2048 usecs) */
+ iwl_write8(priv, CSR_INT_COALESCING, IWL_HOST_INT_TIMEOUT_DEF);
return 0;
}