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Message-Id: <20170413043916.7793-4-benh@kernel.crashing.org>
Date: Thu, 13 Apr 2017 14:39:10 +1000
From: Benjamin Herrenschmidt <benh@...nel.crashing.org>
To: netdev@...r.kernel.org
Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Subject: [PATCH v2 3/9] ftgmac100: Add ndo_set_rx_mode() and support for multicast & promisc
This adds the ndo_set_rx_mode() callback to configure the
multicast filters, promisc and allmulti options.
Signed-off-by: Benjamin Herrenschmidt <benh@...nel.crashing.org>
---
drivers/net/ethernet/faraday/ftgmac100.c | 52 ++++++++++++++++++++++++++++++++
1 file changed, 52 insertions(+)
diff --git a/drivers/net/ethernet/faraday/ftgmac100.c b/drivers/net/ethernet/faraday/ftgmac100.c
index 4be8bf9..551ab3e 100644
--- a/drivers/net/ethernet/faraday/ftgmac100.c
+++ b/drivers/net/ethernet/faraday/ftgmac100.c
@@ -30,6 +30,7 @@
#include <linux/netdevice.h>
#include <linux/phy.h>
#include <linux/platform_device.h>
+#include <linux/crc32.h>
#include <net/ip.h>
#include <net/ncsi.h>
@@ -97,6 +98,10 @@ struct ftgmac100 {
int cur_duplex;
bool use_ncsi;
+ /* Multicast filter settings */
+ u32 maht0;
+ u32 maht1;
+
/* Flow control settings */
bool tx_pause;
bool rx_pause;
@@ -264,6 +269,10 @@ static void ftgmac100_init_hw(struct ftgmac100 *priv)
/* Write MAC address */
ftgmac100_write_mac_addr(priv, priv->netdev->dev_addr);
+ /* Write multicast filter */
+ iowrite32(priv->maht0, priv->base + FTGMAC100_OFFSET_MAHT0);
+ iowrite32(priv->maht1, priv->base + FTGMAC100_OFFSET_MAHT1);
+
/* Configure descriptor sizes and increase burst sizes according
* to values in Aspeed SDK. The FIFO arbitration is enabled and
* the thresholds set based on the recommended values in the
@@ -317,6 +326,12 @@ static void ftgmac100_start_hw(struct ftgmac100 *priv)
/* Add other bits as needed */
if (priv->cur_duplex == DUPLEX_FULL)
maccr |= FTGMAC100_MACCR_FULLDUP;
+ if (priv->netdev->flags & IFF_PROMISC)
+ maccr |= FTGMAC100_MACCR_RX_ALL;
+ if (priv->netdev->flags & IFF_ALLMULTI)
+ maccr |= FTGMAC100_MACCR_RX_MULTIPKT;
+ else if (netdev_mc_count(priv->netdev))
+ maccr |= FTGMAC100_MACCR_HT_MULTI_EN;
/* Hit the HW */
iowrite32(maccr, priv->base + FTGMAC100_OFFSET_MACCR);
@@ -327,6 +342,42 @@ static void ftgmac100_stop_hw(struct ftgmac100 *priv)
iowrite32(0, priv->base + FTGMAC100_OFFSET_MACCR);
}
+static void ftgmac100_calc_mc_hash(struct ftgmac100 *priv)
+{
+ struct netdev_hw_addr *ha;
+
+ priv->maht1 = 0;
+ priv->maht0 = 0;
+ netdev_for_each_mc_addr(ha, priv->netdev) {
+ u32 crc_val = ether_crc_le(ETH_ALEN, ha->addr);
+
+ crc_val = (~(crc_val >> 2)) & 0x3f;
+ if (crc_val >= 32)
+ priv->maht1 |= 1ul << (crc_val - 32);
+ else
+ priv->maht0 |= 1ul << (crc_val);
+ }
+}
+
+static void ftgmac100_set_rx_mode(struct net_device *netdev)
+{
+ struct ftgmac100 *priv = netdev_priv(netdev);
+
+ /* Setup the hash filter */
+ ftgmac100_calc_mc_hash(priv);
+
+ /* Interface down ? that's all there is to do */
+ if (!netif_running(netdev))
+ return;
+
+ /* Update the HW */
+ iowrite32(priv->maht0, priv->base + FTGMAC100_OFFSET_MAHT0);
+ iowrite32(priv->maht1, priv->base + FTGMAC100_OFFSET_MAHT1);
+
+ /* Reconfigure MACCR */
+ ftgmac100_start_hw(priv);
+}
+
static int ftgmac100_alloc_rx_buf(struct ftgmac100 *priv, unsigned int entry,
struct ftgmac100_rxdes *rxdes, gfp_t gfp)
{
@@ -1501,6 +1552,7 @@ static const struct net_device_ops ftgmac100_netdev_ops = {
.ndo_validate_addr = eth_validate_addr,
.ndo_do_ioctl = ftgmac100_do_ioctl,
.ndo_tx_timeout = ftgmac100_tx_timeout,
+ .ndo_set_rx_mode = ftgmac100_set_rx_mode,
};
static int ftgmac100_setup_mdio(struct net_device *netdev)
--
2.9.3
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