net: macb: Add support for jumbo frames
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>
diff --git a/drivers/net/ethernet/cadence/macb.c b/drivers/net/ethernet/cadence/macb.c
index bbe5656..cb84587 100644
--- a/drivers/net/ethernet/cadence/macb.c
+++ b/drivers/net/ethernet/cadence/macb.c
@@ -782,7 +782,7 @@
}
/* 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 @@
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 @@
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 @@
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 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 @@
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 */