[BNX2]: Enable S/G for jumbo RX.
If the MTU requires more than 1 page for the SKB, enable the page ring
and calculate the size of the page ring. This will guarantee order-0
allocation regardless of the MTU size.
Fixup loopback test packet size so that we don't deal with the pages
during loopback test.
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/bnx2.c b/drivers/net/bnx2.c
index 6c0fc8a..ae081c8 100644
--- a/drivers/net/bnx2.c
+++ b/drivers/net/bnx2.c
@@ -4493,15 +4493,32 @@
static void
bnx2_set_rx_ring_size(struct bnx2 *bp, u32 size)
{
- u32 rx_size;
+ u32 rx_size, rx_space, jumbo_size;
/* 8 for CRC and VLAN */
rx_size = bp->dev->mtu + ETH_HLEN + bp->rx_offset + 8;
+ rx_space = SKB_DATA_ALIGN(rx_size + BNX2_RX_ALIGN) + NET_SKB_PAD +
+ sizeof(struct skb_shared_info);
+
bp->rx_copy_thresh = RX_COPY_THRESH;
bp->rx_pg_ring_size = 0;
bp->rx_max_pg_ring = 0;
bp->rx_max_pg_ring_idx = 0;
+ if (rx_space > PAGE_SIZE) {
+ int pages = PAGE_ALIGN(bp->dev->mtu - 40) >> PAGE_SHIFT;
+
+ jumbo_size = size * pages;
+ if (jumbo_size > MAX_TOTAL_RX_PG_DESC_CNT)
+ jumbo_size = MAX_TOTAL_RX_PG_DESC_CNT;
+
+ bp->rx_pg_ring_size = jumbo_size;
+ bp->rx_max_pg_ring = bnx2_find_max_ring(jumbo_size,
+ MAX_RX_PG_RINGS);
+ bp->rx_max_pg_ring_idx = (bp->rx_max_pg_ring * RX_DESC_CNT) - 1;
+ rx_size = RX_COPY_THRESH + bp->rx_offset;
+ bp->rx_copy_thresh = 0;
+ }
bp->rx_buf_use_size = rx_size;
/* hw alignment */
@@ -4881,7 +4898,7 @@
else
return -EINVAL;
- pkt_size = 1514;
+ pkt_size = min(bp->dev->mtu + ETH_HLEN, bp->rx_jumbo_thresh - 4);
skb = netdev_alloc_skb(bp->dev, pkt_size);
if (!skb)
return -ENOMEM;