iwlwifi: move rx queue read pointer into rxq

This patch moves rx status/read registers into
iwl_rx_queue structures. This solution is more memory
hungry but is more structured and provides needed RX/TX
separation

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>

1 files changed, 16 insertions, 2 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-rx.c b/drivers/net/wireless/iwlwifi/iwl-rx.c
index b3c35c64d042..48d55741b769 100644
--- a/drivers/net/wireless/iwlwifi/iwl-rx.c
+++ b/drivers/net/wireless/iwlwifi/iwl-rx.c
@@ -317,7 +317,10 @@ void iwl_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
 
         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
                             rxq->dma_addr);
+        pci_free_consistent(priv->pci_dev, sizeof(struct iwl_rb_status),
+                            rxq->rb_stts, rxq->rb_stts_dma);
         rxq->bd = NULL;
+        rxq->rb_stts  = NULL;
 }
 EXPORT_SYMBOL(iwl_rx_queue_free);
 
@@ -334,7 +337,12 @@ int iwl_rx_queue_alloc(struct iwl_priv *priv)
         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
         if (!rxq->bd)
-                return -ENOMEM;
+                goto err_bd;
+
+        rxq->rb_stts = pci_alloc_consistent(dev, sizeof(struct iwl_rb_status),
+                                        &rxq->rb_stts_dma);
+        if (!rxq->rb_stts)
+                goto err_rb;
 
         /* Fill the rx_used queue with _all_ of the Rx buffers */
         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
@@ -346,6 +354,12 @@ int iwl_rx_queue_alloc(struct iwl_priv *priv)
         rxq->free_count = 0;
         rxq->need_update = 0;
         return 0;
+
+err_rb:
+        pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
+                            rxq->dma_addr);
+err_bd:
+        return -ENOMEM;
 }
 EXPORT_SYMBOL(iwl_rx_queue_alloc);
 
@@ -412,7 +426,7 @@ int iwl_rx_init(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
 
         /* Tell device where in DRAM to update its Rx status */
         iwl_write_direct32(priv, FH_RSCSR_CHNL0_STTS_WPTR_REG,
-                           (priv->shared_phys + priv->rb_closed_offset) >> 4);
+                           rxq->rb_stts_dma >> 4);
 
         /* Enable Rx DMA
          * FH_RCSR_CHNL0_RX_IGNORE_RXF_EMPTY is set because of HW bug in