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iwlwifi: set interrupt coalescing timer range and default

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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>
This commit is contained in:
Wey-Yi Guy 2010-01-15 13:43:37 -08:00 committed by John W. Linville
parent 937c397eb6
commit 2be76703a3
3 changed files with 19 additions and 4 deletions
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4
drivers/net/wireless/iwlwifi/iwl-core.c
View file

@ -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);

15
drivers/net/wireless/iwlwifi/iwl-dev.h
View file

@ -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 */

4
drivers/net/wireless/iwlwifi/iwl-rx.c
View file

@ -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;
}