qede: Optimize aggregation information size

Driver needs to maintain a structure per-each concurrent possible
open aggregation, but the structure storing that metadata is far from
being optimized - biggest waste in it is that there are 2 buffer metadata,
one for a replacement buffer when the aggregation begins and the other for
holding the first aggregation's buffer after it begins [as firmware might
still update it]. Those 2 can safely be united into a single metadata
structure.

struct qede_agg_info changes the following:

	/* size: 120, cachelines: 2, members: 9 */
	/* sum members: 114, holes: 1, sum holes: 4 */
	/* padding: 2 */
	/* paddings: 2, sum paddings: 8 */
	/* last cacheline: 56 bytes */
 -->
	/* size: 48, cachelines: 1, members: 9 */
	/* paddings: 1, sum paddings: 4 */
	/* last cacheline: 48 bytes */

Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 22 insertions, 7 deletions

diff --git a/drivers/net/ethernet/qlogic/qede/qede.h b/drivers/net/ethernet/qlogic/qede/qede.h
index 0cba21bf9d5f..efd6cfe741f6 100644
--- a/drivers/net/ethernet/qlogic/qede/qede.h
+++ b/drivers/net/ethernet/qlogic/qede/qede.h
@@ -225,15 +225,30 @@ enum qede_agg_state {
 };
 
 struct qede_agg_info {
-	struct sw_rx_data replace_buf;
-	dma_addr_t replace_buf_mapping;
-	struct sw_rx_data start_buf;
-	dma_addr_t start_buf_mapping;
-	struct eth_fast_path_rx_tpa_start_cqe start_cqe;
-	enum qede_agg_state agg_state;
+	/* rx_buf is a data buffer that can be placed / consumed from rx bd
+	 * chain. It has two purposes: We will preallocate the data buffer
+	 * for each aggregation when we open the interface and will place this
+	 * buffer on the rx-bd-ring when we receive TPA_START. We don't want
+	 * to be in a state where allocation fails, as we can't reuse the
+	 * consumer buffer in the rx-chain since FW may still be writing to it
+	 * (since header needs to be modified for TPA).
+	 * The second purpose is to keep a pointer to the bd buffer during
+	 * aggregation.
+	 */
+	struct sw_rx_data buffer;
+	dma_addr_t buffer_mapping;
+
 	struct sk_buff *skb;
-	int frag_id;
+
+	/* We need some structs from the start cookie until termination */
 	u16 vlan_tag;
+	u16 start_cqe_bd_len;
+	u8 start_cqe_placement_offset;
+
+	u8 state;
+	u8 frag_id;
+
+	u8 tunnel_type;
 };
 
 struct qede_rx_queue {