amd-xgbe: Use page allocations for Rx buffers
Use page allocations for Rx buffers instead of pre-allocating skbs
of a set size.
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe.h b/drivers/net/ethernet/amd/xgbe/xgbe.h
index 19f1d90..d3aa055 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe.h
+++ b/drivers/net/ethernet/amd/xgbe/xgbe.h
@@ -142,6 +142,7 @@
#define XGBE_RX_MIN_BUF_SIZE (ETH_FRAME_LEN + ETH_FCS_LEN + VLAN_HLEN)
#define XGBE_RX_BUF_ALIGN 64
+#define XGBE_SKB_ALLOC_SIZE 256
#define XGBE_MAX_DMA_CHANNELS 16
#define XGBE_MAX_QUEUES 16
@@ -240,6 +241,15 @@
u32 desc3;
};
+/* Page allocation related values */
+struct xgbe_page_alloc {
+ struct page *pages;
+ unsigned int pages_len;
+ unsigned int pages_offset;
+
+ dma_addr_t pages_dma;
+};
+
/* Structure used to hold information related to the descriptor
* and the packet associated with the descriptor (always use
* use the XGBE_GET_DESC_DATA macro to access this data from the ring)
@@ -253,6 +263,12 @@
unsigned int skb_dma_len; /* Length of SKB DMA area */
unsigned int tso_header; /* TSO header indicator */
+ struct xgbe_page_alloc rx_pa; /* Rx buffer page allocation */
+ struct xgbe_page_alloc rx_unmap;
+
+ dma_addr_t rx_dma; /* DMA address of Rx buffer */
+ unsigned int rx_dma_len; /* Length of the Rx DMA buffer */
+
unsigned short len; /* Length of received Rx packet */
unsigned int interrupt; /* Interrupt indicator */
@@ -291,6 +307,9 @@
*/
struct xgbe_ring_data *rdata;
+ /* Page allocation for RX buffers */
+ struct xgbe_page_alloc rx_pa;
+
/* Ring index values
* cur - Tx: index of descriptor to be used for current transfer
* Rx: index of descriptor to check for packet availability
@@ -515,8 +534,8 @@
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_skb)(struct xgbe_channel *);
- void (*unmap_skb)(struct xgbe_prv_data *, struct xgbe_ring_data *);
+ void (*realloc_rx_buffer)(struct xgbe_channel *);
+ 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 *);
};
@@ -624,7 +643,7 @@
unsigned int rx_riwt;
unsigned int rx_frames;
- /* Current MTU */
+ /* Current Rx buffer size */
unsigned int rx_buf_size;
/* Flow control settings */