mirror of https://gitee.com/openkylin/linux.git
mlx4: removal of frag_sizes[]
We will soon use order-0 pages, and frag truesize will more precisely match real sizes. In the new model, we prefer to use <= 2048 bytes fragments, so that we can use page-recycle technique on PAGE_SIZE=4096 arches. We will still pack as much frames as possible on arches with big pages, like PowerPC. Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Tariq Toukan <tariqt@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -1181,13 +1181,6 @@ int mlx4_en_poll_rx_cq(struct napi_struct *napi, int budget)
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return done;
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return done;
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}
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}
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static const int frag_sizes[] = {
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FRAG_SZ0,
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FRAG_SZ1,
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FRAG_SZ2,
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FRAG_SZ3
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};
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void mlx4_en_calc_rx_buf(struct net_device *dev)
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void mlx4_en_calc_rx_buf(struct net_device *dev)
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{
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{
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struct mlx4_en_priv *priv = netdev_priv(dev);
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struct mlx4_en_priv *priv = netdev_priv(dev);
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@ -1211,13 +1204,16 @@ void mlx4_en_calc_rx_buf(struct net_device *dev)
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int buf_size = 0;
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int buf_size = 0;
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while (buf_size < eff_mtu) {
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while (buf_size < eff_mtu) {
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priv->frag_info[i].frag_size =
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int frag_size = eff_mtu - buf_size;
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(eff_mtu > buf_size + frag_sizes[i]) ?
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frag_sizes[i] : eff_mtu - buf_size;
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if (i < MLX4_EN_MAX_RX_FRAGS - 1)
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priv->frag_info[i].frag_stride =
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frag_size = min(frag_size, 2048);
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ALIGN(priv->frag_info[i].frag_size,
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SMP_CACHE_BYTES);
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priv->frag_info[i].frag_size = frag_size;
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buf_size += priv->frag_info[i].frag_size;
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priv->frag_info[i].frag_stride = ALIGN(frag_size,
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SMP_CACHE_BYTES);
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buf_size += frag_size;
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i++;
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i++;
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}
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}
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priv->rx_page_order = MLX4_EN_ALLOC_PREFER_ORDER;
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priv->rx_page_order = MLX4_EN_ALLOC_PREFER_ORDER;
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@ -105,14 +105,6 @@
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#define MLX4_EN_ALLOC_PREFER_ORDER min_t(int, get_order(32768), \
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#define MLX4_EN_ALLOC_PREFER_ORDER min_t(int, get_order(32768), \
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PAGE_ALLOC_COSTLY_ORDER)
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PAGE_ALLOC_COSTLY_ORDER)
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/* Receive fragment sizes; we use at most 3 fragments (for 9600 byte MTU
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* and 4K allocations) */
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enum {
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FRAG_SZ0 = 1536 - NET_IP_ALIGN,
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FRAG_SZ1 = 4096,
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FRAG_SZ2 = 4096,
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FRAG_SZ3 = MLX4_EN_ALLOC_SIZE
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};
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#define MLX4_EN_MAX_RX_FRAGS 4
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#define MLX4_EN_MAX_RX_FRAGS 4
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/* Maximum ring sizes */
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/* Maximum ring sizes */
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