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amd-xgbe: Simplify the Rx desciptor ring tracking

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Make the Rx descriptor ring processing similar to the Tx descriptor
ring processing.  Remove the realloc_index and realloc_threshold
variables and base everything on the current index counter and the
dirty index counter.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Lendacky, Thomas
2015-01-16 12:46:50 -06:00
committed by David S. Miller
parent 916102c666
commit 270894e7dc
3 changed files with 25 additions and 43 deletions
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11
drivers/net/ethernet/amd/xgbe/xgbe.h
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@@ -361,8 +361,7 @@ struct xgbe_ring {
* cur - Tx: index of descriptor to be used for current transfer
* Rx: index of descriptor to check for packet availability
* dirty - Tx: index of descriptor to check for transfer complete
* Rx: count of descriptors in which a packet has been received
* (used with skb_realloc_index to refresh the ring)
* Rx: index of descriptor to check for buffer reallocation
*/
unsigned int cur;
unsigned int dirty;
@@ -377,11 +376,6 @@ struct xgbe_ring {
unsigned short cur_mss;
unsigned short cur_vlan_ctag;
} tx;
struct {
unsigned int realloc_index;
unsigned int realloc_threshold;
} rx;
};
} ____cacheline_aligned;
@@ -596,7 +590,8 @@ struct xgbe_desc_if {
int (*alloc_ring_resources)(struct xgbe_prv_data *);
void (*free_ring_resources)(struct xgbe_prv_data *);
int (*map_tx_skb)(struct xgbe_channel *, struct sk_buff *);
void (*realloc_rx_buffer)(struct xgbe_channel *);
int (*map_rx_buffer)(struct xgbe_prv_data *, struct xgbe_ring *,
struct xgbe_ring_data *);
void (*unmap_rdata)(struct xgbe_prv_data *, struct xgbe_ring_data *);
void (*wrapper_tx_desc_init)(struct xgbe_prv_data *);
void (*wrapper_rx_desc_init)(struct xgbe_prv_data *);