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Commit a550c99b authored by Michael Chan's avatar Michael Chan Committed by David S. Miller
Browse files

[BNX2]: Move tx indexes into bnx2_napi struct. 



Tx related fields used in NAPI polling are moved from the main
bnx2 struct to the bnx2_napi struct.

Signed-off-by: default avatarMichael Chan <mchan@broadcom.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 35efa7c1

drivers/net/bnx2.c

+17 −14
Original line number Diff line number Diff line
@@ -226,7 +226,7 @@ static struct flash_spec flash_5709 = { 


MODULE_DEVICE_TABLE(pci, bnx2_pci_tbl);



static inline u32 bnx2_tx_avail(struct bnx2 *bp)

static inline u32 bnx2_tx_avail(struct bnx2 *bp, struct bnx2_napi *bnapi)

{

	u32 diff;
@@ -235,7 +235,7 @@ static inline u32 bnx2_tx_avail(struct bnx2 *bp) 
	/* The ring uses 256 indices for 255 entries, one of them

	 * needs to be skipped.

	 */

	diff = bp->tx_prod - bp->tx_cons;

	diff = bp->tx_prod - bnapi->tx_cons;

	if (unlikely(diff >= TX_DESC_CNT)) {

		diff &= 0xffff;

		if (diff == TX_DESC_CNT)
@@ -2358,7 +2358,7 @@ bnx2_tx_int(struct bnx2 *bp, struct bnx2_napi *bnapi) 
	int tx_free_bd = 0;



	hw_cons = bnx2_get_hw_tx_cons(bnapi);

	sw_cons = bp->tx_cons;

	sw_cons = bnapi->tx_cons;



	while (sw_cons != hw_cons) {

		struct sw_bd *tx_buf;
@@ -2412,8 +2412,8 @@ bnx2_tx_int(struct bnx2 *bp, struct bnx2_napi *bnapi) 
		hw_cons = bnx2_get_hw_tx_cons(bnapi);

	}



	bp->hw_tx_cons = hw_cons;

	bp->tx_cons = sw_cons;

	bnapi->hw_tx_cons = hw_cons;

	bnapi->tx_cons = sw_cons;

	/* Need to make the tx_cons update visible to bnx2_start_xmit()

	 * before checking for netif_queue_stopped().  Without the

	 * memory barrier, there is a small possibility that bnx2_start_xmit()
@@ -2422,10 +2422,10 @@ bnx2_tx_int(struct bnx2 *bp, struct bnx2_napi *bnapi) 
	smp_mb();



	if (unlikely(netif_queue_stopped(bp->dev)) &&

		     (bnx2_tx_avail(bp) > bp->tx_wake_thresh)) {

		     (bnx2_tx_avail(bp, bnapi) > bp->tx_wake_thresh)) {

		netif_tx_lock(bp->dev);

		if ((netif_queue_stopped(bp->dev)) &&

		    (bnx2_tx_avail(bp) > bp->tx_wake_thresh))

		    (bnx2_tx_avail(bp, bnapi) > bp->tx_wake_thresh))

			netif_wake_queue(bp->dev);

		netif_tx_unlock(bp->dev);

	}
@@ -2846,7 +2846,7 @@ bnx2_has_work(struct bnx2_napi *bnapi) 
	struct status_block *sblk = bp->status_blk;



	if ((bnx2_get_hw_rx_cons(bnapi) != bp->rx_cons) ||

	    (bnx2_get_hw_tx_cons(bnapi) != bp->hw_tx_cons))

	    (bnx2_get_hw_tx_cons(bnapi) != bnapi->hw_tx_cons))

		return 1;



	if ((sblk->status_attn_bits & STATUS_ATTN_EVENTS) !=
@@ -2876,7 +2876,7 @@ static int bnx2_poll_work(struct bnx2 *bp, struct bnx2_napi *bnapi, 
		REG_RD(bp, BNX2_HC_COMMAND);

	}



	if (bnx2_get_hw_tx_cons(bnapi) != bp->hw_tx_cons)

	if (bnx2_get_hw_tx_cons(bnapi) != bnapi->hw_tx_cons)

		bnx2_tx_int(bp, bnapi);



	if (bnx2_get_hw_rx_cons(bnapi) != bp->rx_cons)
@@ -4381,6 +4381,7 @@ bnx2_init_tx_ring(struct bnx2 *bp) 
{

	struct tx_bd *txbd;

	u32 cid;

	struct bnx2_napi *bnapi = &bp->bnx2_napi;



	bp->tx_wake_thresh = bp->tx_ring_size / 2;
@@ -4390,8 +4391,8 @@ bnx2_init_tx_ring(struct bnx2 *bp) 
	txbd->tx_bd_haddr_lo = (u64) bp->tx_desc_mapping & 0xffffffff;



	bp->tx_prod = 0;

	bp->tx_cons = 0;

	bp->hw_tx_cons = 0;

	bnapi->tx_cons = 0;

	bnapi->hw_tx_cons = 0;

	bp->tx_prod_bseq = 0;



	cid = TX_CID;
@@ -5440,8 +5441,10 @@ bnx2_start_xmit(struct sk_buff *skb, struct net_device *dev) 
	u32 len, vlan_tag_flags, last_frag, mss;

	u16 prod, ring_prod;

	int i;

	struct bnx2_napi *bnapi = &bp->bnx2_napi;



	if (unlikely(bnx2_tx_avail(bp) < (skb_shinfo(skb)->nr_frags + 1))) {

	if (unlikely(bnx2_tx_avail(bp, bnapi) <

	    (skb_shinfo(skb)->nr_frags + 1))) {

		netif_stop_queue(dev);

		printk(KERN_ERR PFX "%s: BUG! Tx ring full when queue awake!\n",

			dev->name);
@@ -5556,9 +5559,9 @@ bnx2_start_xmit(struct sk_buff *skb, struct net_device *dev) 
	bp->tx_prod = prod;

	dev->trans_start = jiffies;



	if (unlikely(bnx2_tx_avail(bp) <= MAX_SKB_FRAGS)) {

	if (unlikely(bnx2_tx_avail(bp, bnapi) <= MAX_SKB_FRAGS)) {

		netif_stop_queue(dev);

		if (bnx2_tx_avail(bp) > bp->tx_wake_thresh)

		if (bnx2_tx_avail(bp, bnapi) > bp->tx_wake_thresh)

			netif_wake_queue(dev);

	}

drivers/net/bnx2.h

+3 −3
Original line number Diff line number Diff line
@@ -6509,6 +6509,9 @@ struct bnx2_napi { 
	struct status_block	*status_blk;

	u32 			last_status_idx;

	u32			int_num;



	u16			tx_cons;

	u16			hw_tx_cons;

};



struct bnx2 {
@@ -6539,9 +6542,6 @@ struct bnx2 { 
	u32		tx_bidx_addr;

	u32		tx_bseq_addr;



	u16		tx_cons __attribute__((aligned(L1_CACHE_BYTES)));

	u16		hw_tx_cons;



	struct bnx2_napi	bnx2_napi;



#ifdef BCM_VLAN