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net: macb: Add support for jumbo frames

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Enable jumbo frame support for Zynq Ultrascale+ MPSoC.
Update the NWCFG register and descriptor length masks accordingly.
Jumbo max length register should be set according to support in SoC; it is
set to 10240 for Zynq Ultrascale+ MPSoC.

Signed-off-by: Harini Katakam <harinik@xilinx.com>
Reviewed-by: Punnaiah Choudary Kalluri <punnaia@xilinx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Harini Katakam
2015-05-06 22:27:17 +05:30
committed by David S. Miller
parent 7b61f9c132
commit 98b5a0f4a2
2 changed files with 27 additions and 4 deletions
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22
drivers/net/ethernet/cadence/macb.c
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@@ -782,7 +782,7 @@ static int gem_rx(struct macb *bp, int budget)
}
/* now everything is ready for receiving packet */
bp->rx_skbuff[entry] = NULL;
len = MACB_BFEXT(RX_FRMLEN, ctrl);
len = ctrl & bp->rx_frm_len_mask;
netdev_vdbg(bp->dev, "gem_rx %u (len %u)\n", entry, len);
@@ -828,7 +828,7 @@ static int macb_rx_frame(struct macb *bp, unsigned int first_frag,
struct macb_dma_desc *desc;
desc = macb_rx_desc(bp, last_frag);
len = MACB_BFEXT(RX_FRMLEN, desc->ctrl);
len = desc->ctrl & bp->rx_frm_len_mask;
netdev_vdbg(bp->dev, "macb_rx_frame frags %u - %u (len %u)\n",
macb_rx_ring_wrap(first_frag),
@@ -1633,7 +1633,10 @@ static void macb_init_hw(struct macb *bp)
config |= MACB_BF(RBOF, NET_IP_ALIGN); /* Make eth data aligned */
config |= MACB_BIT(PAE); /* PAuse Enable */
config |= MACB_BIT(DRFCS); /* Discard Rx FCS */
config |= MACB_BIT(BIG); /* Receive oversized frames */
if (bp->caps | MACB_CAPS_JUMBO)
config |= MACB_BIT(JFRAME); /* Enable jumbo frames */
else
config |= MACB_BIT(BIG); /* Receive oversized frames */
if (bp->dev->flags & IFF_PROMISC)
config |= MACB_BIT(CAF); /* Copy All Frames */
else if (macb_is_gem(bp) && bp->dev->features & NETIF_F_RXCSUM)
@@ -1642,8 +1645,13 @@ static void macb_init_hw(struct macb *bp)
config |= MACB_BIT(NBC); /* No BroadCast */
config |= macb_dbw(bp);
macb_writel(bp, NCFGR, config);
if ((bp->caps | MACB_CAPS_JUMBO) && bp->jumbo_max_len)
gem_writel(bp, JML, bp->jumbo_max_len);
bp->speed = SPEED_10;
bp->duplex = DUPLEX_HALF;
bp->rx_frm_len_mask = MACB_RX_FRMLEN_MASK;
if (bp->caps | MACB_CAPS_JUMBO)
bp->rx_frm_len_mask = MACB_RX_JFRMLEN_MASK;
macb_configure_dma(bp);
@@ -2685,10 +2693,12 @@ static const struct macb_config emac_config = {
};
static const struct macb_config zynqmp_config = {
.caps = MACB_CAPS_SG_DISABLED | MACB_CAPS_GIGABIT_MODE_AVAILABLE,
.caps = MACB_CAPS_SG_DISABLED | MACB_CAPS_GIGABIT_MODE_AVAILABLE |
MACB_CAPS_JUMBO,
.dma_burst_length = 16,
.clk_init = macb_clk_init,
.init = macb_init,
.jumbo_max_len = 10240,
};
static const struct of_device_id macb_dt_ids[] = {
@@ -2770,6 +2780,10 @@ static int macb_probe(struct platform_device *pdev)
bp->pclk = pclk;
bp->hclk = hclk;
bp->tx_clk = tx_clk;
if (macb_config->jumbo_max_len) {
bp->jumbo_max_len = macb_config->jumbo_max_len;
}
spin_lock_init(&bp->lock);
/* setup capabilities */