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Commit 66f9513a authored by Rasesh Mody's avatar Rasesh Mody Committed by David S. Miller
Browse files

bna: RX Processing and Config Changes 



Change Details:
 - Prefetch header in GRO path. This reduces napi_frags_skb time from 9% to 5%.
 - Changed the configurable limit of RxQ depth to 16384 (was 2048).
 - bnad_rx_unmap_q elements are cachealigned.

Signed-off-by: default avatarRasesh Mody <rmody@brocade.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent e29aa339

drivers/net/ethernet/brocade/bna/bnad.c

+5 −0
Original line number Original line Diff line number Diff line
@@ -536,6 +536,11 @@ bnad_cq_setup_skb_frags(struct bna_rcb *rcb, struct sk_buff *skb, 




	unmap_q = rcb->unmap_q;

	unmap_q = rcb->unmap_q;

	bnad = rcb->bnad;

	bnad = rcb->bnad;



	/* prefetch header */

	prefetch(page_address(unmap_q->unmap[sop_ci].page) +

			unmap_q->unmap[sop_ci].page_offset);



	for (vec = 1, ci = sop_ci; vec <= nvecs; vec++) {

	for (vec = 1, ci = sop_ci; vec <= nvecs; vec++) {

		unmap = &unmap_q->unmap[ci];

		unmap = &unmap_q->unmap[ci];

		BNA_QE_INDX_INC(ci, rcb->q_depth);

		BNA_QE_INDX_INC(ci, rcb->q_depth);

drivers/net/ethernet/brocade/bna/bnad.h

+3 −3
Original line number Original line Diff line number Diff line
@@ -84,7 +84,7 @@ struct bnad_rx_ctrl { 
#define BNAD_IOCETH_TIMEOUT	     10000

#define BNAD_IOCETH_TIMEOUT	     10000





#define BNAD_MIN_Q_DEPTH		512

#define BNAD_MIN_Q_DEPTH		512

#define BNAD_MAX_RXQ_DEPTH		2048

#define BNAD_MAX_RXQ_DEPTH		16384

#define BNAD_MAX_TXQ_DEPTH		2048

#define BNAD_MAX_TXQ_DEPTH		2048





#define BNAD_JUMBO_MTU			9000

#define BNAD_JUMBO_MTU			9000
@@ -237,9 +237,9 @@ struct bnad_rx_vector { 




struct bnad_rx_unmap {

struct bnad_rx_unmap {

	struct page		*page;

	struct page		*page;

	u32			page_offset;

	struct sk_buff		*skb;

	struct sk_buff		*skb;

	struct bnad_rx_vector	vector;

	struct bnad_rx_vector	vector;

	u32			page_offset;

};

};





enum bnad_rxbuf_type {

enum bnad_rxbuf_type {
@@ -257,7 +257,7 @@ struct bnad_rx_unmap_q { 
	int			alloc_order;

	int			alloc_order;

	u32			map_size;

	u32			map_size;

	enum bnad_rxbuf_type	type;

	enum bnad_rxbuf_type	type;

	struct bnad_rx_unmap	unmap[0];

	struct bnad_rx_unmap	unmap[0] ____cacheline_aligned;

};

};





#define BNAD_PCI_DEV_IS_CAT2(_bnad) \

#define BNAD_PCI_DEV_IS_CAT2(_bnad) \