[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>
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@ -4493,15 +4493,32 @@ static u32 bnx2_find_max_ring(u32 ring_size, u32 max_size)
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static void
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bnx2_set_rx_ring_size(struct bnx2 *bp, u32 size)
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{
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u32 rx_size;
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u32 rx_size, rx_space, jumbo_size;
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/* 8 for CRC and VLAN */
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rx_size = bp->dev->mtu + ETH_HLEN + bp->rx_offset + 8;
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rx_space = SKB_DATA_ALIGN(rx_size + BNX2_RX_ALIGN) + NET_SKB_PAD +
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sizeof(struct skb_shared_info);
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bp->rx_copy_thresh = RX_COPY_THRESH;
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bp->rx_pg_ring_size = 0;
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bp->rx_max_pg_ring = 0;
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bp->rx_max_pg_ring_idx = 0;
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if (rx_space > PAGE_SIZE) {
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int pages = PAGE_ALIGN(bp->dev->mtu - 40) >> PAGE_SHIFT;
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jumbo_size = size * pages;
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if (jumbo_size > MAX_TOTAL_RX_PG_DESC_CNT)
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jumbo_size = MAX_TOTAL_RX_PG_DESC_CNT;
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bp->rx_pg_ring_size = jumbo_size;
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bp->rx_max_pg_ring = bnx2_find_max_ring(jumbo_size,
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MAX_RX_PG_RINGS);
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bp->rx_max_pg_ring_idx = (bp->rx_max_pg_ring * RX_DESC_CNT) - 1;
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rx_size = RX_COPY_THRESH + bp->rx_offset;
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bp->rx_copy_thresh = 0;
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}
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bp->rx_buf_use_size = rx_size;
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/* hw alignment */
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@ -4881,7 +4898,7 @@ bnx2_run_loopback(struct bnx2 *bp, int loopback_mode)
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else
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return -EINVAL;
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pkt_size = 1514;
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pkt_size = min(bp->dev->mtu + ETH_HLEN, bp->rx_jumbo_thresh - 4);
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skb = netdev_alloc_skb(bp->dev, pkt_size);
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if (!skb)
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return -ENOMEM;
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