Re: [PATCH net-next v4 3/6] net: bcmasp: Add support for ASP2.0 Ethernet controller

On Tue, May 23, 2023 at 02:53:44PM -0700, Justin Chen wrote:

Add support for the Broadcom ASP 2.0 Ethernet controller which is first
introduced with 72165. This controller features two distinct Ethernet
ports that can be independently operated.

This patch supports:

- Wake-on-LAN using magic packets
- basic ethtool operations (link, counters, message level)
- MAC destination address filtering (promiscuous, ALL_MULTI, etc.)

Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
Signed-off-by: Justin Chen <justin.chen@broadcom.com>

Hi Justin,

Reviewed-by: Simon Horman <redacted>

As I see there will be a v5 I have added a few nits from my side.
Feel free to ignore them as you see fit.

...

+int bcmasp_netfilt_check_dup(struct bcmasp_intf *intf,
+			     struct ethtool_rx_flow_spec *fs)

nit: the return type of this function could be bool

+{
+	struct bcmasp_priv *priv = intf->parent;
+	struct ethtool_rx_flow_spec *cur;
+	size_t fs_size = 0;
+	int i;
+
+	for (i = 0; i < NUM_NET_FILTERS; i++) {
+		if (!priv->net_filters[i].claimed ||
+		    priv->net_filters[i].port != intf->port)
+			continue;
+
+		cur = &priv->net_filters[i].fs;
+
+		if (cur->flow_type != fs->flow_type ||
+		    cur->ring_cookie != fs->ring_cookie)
+			continue;
+
+		switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT)) {
+		case ETHER_FLOW:
+			fs_size = sizeof(struct ethhdr);
+			break;
+		case IP_USER_FLOW:
+			fs_size = sizeof(struct ethtool_usrip4_spec);
+			break;
+		case TCP_V6_FLOW:
+		case UDP_V6_FLOW:
+			fs_size = sizeof(struct ethtool_tcpip6_spec);
+			break;
+		case TCP_V4_FLOW:
+		case UDP_V4_FLOW:
+			fs_size = sizeof(struct ethtool_tcpip4_spec);
+			break;
+		default:
+			continue;
+		}
+
+		if (memcmp(&cur->h_u, &fs->h_u, fs_size) ||
+		    memcmp(&cur->m_u, &fs->m_u, fs_size))
+			continue;
+
+		if (cur->flow_type & FLOW_EXT) {
+			if (cur->h_ext.vlan_etype != fs->h_ext.vlan_etype ||
+			    cur->m_ext.vlan_etype != fs->m_ext.vlan_etype ||
+			    cur->h_ext.vlan_tci != fs->h_ext.vlan_tci ||
+			    cur->m_ext.vlan_tci != fs->m_ext.vlan_tci ||
+			    cur->h_ext.data[0] != fs->h_ext.data[0])
+				continue;
+		}
+		if (cur->flow_type & FLOW_MAC_EXT) {
+			if (memcmp(&cur->h_ext.h_dest,
+				   &fs->h_ext.h_dest, ETH_ALEN) ||
+			    memcmp(&cur->m_ext.h_dest,
+				   &fs->m_ext.h_dest, ETH_ALEN))
+				continue;
+		}
+
+		return 1;
+	}
+
+	return 0;
+}

...

+static int bcmasp_is_port_valid(struct bcmasp_priv *priv, int port)
+{
+	/* Quick sanity check
+	 *   Ports 0/1 reserved for unimac
+	 *   Max supported ports is 2
+	 */
+	return (port == 0 || port == 1);

nit: unnecessary parentheses

+}

...