iwl3945: use iwl_rb_status

This patch makes use of iwl_rb_status also in 3945. The structure
for 3945 is not the same but since only closed_rb_num filed is used
in both cases there is no reason to duplicate it.
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/iwlwifi/iwl-3945-hw.h

@@ -302,7 +302,6 @@ static inline int iwl3945_hw_valid_rtc_data_addr(u32 addr)
  * and &iwl3945_shared.rx_read_ptr[0] is provided to FH_RCSR_RPTR_ADDR(0) */
 struct iwl3945_shared {
 	__le32 tx_base_ptr[8];
-	__le32 rx_read_ptr[3];
 } __attribute__ ((packed));
 
 struct iwl3945_tfd_frame_data {

drivers/net/wireless/iwlwifi/iwl-3945.c

@@ -974,9 +974,7 @@ static int iwl3945_rx_init(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
 	}
 
 	iwl_write_direct32(priv, FH39_RCSR_RBD_BASE(0), rxq->dma_addr);
-	iwl_write_direct32(priv, FH39_RCSR_RPTR_ADDR(0),
-			     priv->shared_phys +
-			     offsetof(struct iwl3945_shared, rx_read_ptr[0]));
+	iwl_write_direct32(priv, FH39_RCSR_RPTR_ADDR(0), rxq->rb_stts_dma);
 	iwl_write_direct32(priv, FH39_RCSR_WPTR(0), 0);
 	iwl_write_direct32(priv, FH39_RCSR_CONFIG(0),
 		FH39_RCSR_RX_CONFIG_REG_VAL_DMA_CHNL_EN_ENABLE |
@@ -2377,13 +2375,6 @@ int iwl3945_hw_tx_queue_init(struct iwl_priv *priv, struct iwl3945_tx_queue *txq
 	return 0;
 }
 
-int iwl3945_hw_get_rx_read(struct iwl_priv *priv)
-{
-	struct iwl3945_shared *shared_data = priv->shared_virt;
-
-	return le32_to_cpu(shared_data->rx_read_ptr[0]);
-}
-
 /**
  * iwl3945_init_hw_rate_table - Initialize the hardware rate fallback table
  */

drivers/net/wireless/iwlwifi/iwl-3945.h

@@ -282,7 +282,6 @@ extern int iwl3945_hw_tx_queue_init(struct iwl_priv *priv,
 				struct iwl3945_tx_queue *txq);
 extern unsigned int iwl3945_hw_get_beacon_cmd(struct iwl_priv *priv,
 				 struct iwl3945_frame *frame, u8 rate);
-extern int iwl3945_hw_get_rx_read(struct iwl_priv *priv);
 void iwl3945_hw_build_tx_cmd_rate(struct iwl_priv *priv, struct iwl_cmd *cmd,
 				     struct ieee80211_tx_info *info,
 				     struct ieee80211_hdr *hdr,

drivers/net/wireless/iwlwifi/iwl-fh.h

@@ -414,6 +414,7 @@ struct iwl_rb_status {
 	__le16 closed_fr_num;
 	__le16 finished_rb_num;
 	__le16 finished_fr_nam;
+	__le32 __unused; /* 3945 only */
 } __attribute__ ((packed));
 
 

drivers/net/wireless/iwlwifi/iwl3945-base.c

@@ -3588,7 +3588,7 @@ static void iwl3945_rx_handle(struct iwl_priv *priv)
 
 	/* uCode's read index (stored in shared DRAM) indicates the last Rx
 	 * buffer that the driver may process (last buffer filled by ucode). */
-	r = iwl3945_hw_get_rx_read(priv);
+	r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
 	i = rxq->read;
 
 	if (iwl3945_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))