Merge branch 'NCSI-vlan-filtering'

Samuel Mendoza-Jonas says:

====================
NCSI VLAN Filtering Support

This series (mainly patch 2) adds VLAN filtering to the NCSI implementation.
A fair amount of code already exists in the NCSI stack for VLAN filtering but
none of it is actually hooked up. This goes the final mile and fixes a few
bugs in the existing code found along the way (patch 1).

Patch 3 adds the appropriate flag and callbacks to the ftgmac100 driver to
enable filtering as it's a large consumer of NCSI (and what I've been
testing on).

v3:	- Add comment describing change to ncsi_find_filter()
	- Catch NULL in clear_one_vid() from ncsi_get_filter()
	- Simplify state changes when kicking updated channel
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/faraday/ftgmac100.c

@@ -1623,6 +1623,8 @@ static const struct net_device_ops ftgmac100_netdev_ops = {
 #ifdef CONFIG_NET_POLL_CONTROLLER
 	.ndo_poll_controller	= ftgmac100_poll_controller,
 #endif
+	.ndo_vlan_rx_add_vid	= ncsi_vlan_rx_add_vid,
+	.ndo_vlan_rx_kill_vid	= ncsi_vlan_rx_kill_vid,
 };
 
 static int ftgmac100_setup_mdio(struct net_device *netdev)
@@ -1837,6 +1839,9 @@ static int ftgmac100_probe(struct platform_device *pdev)
 		NETIF_F_GRO | NETIF_F_SG | NETIF_F_HW_VLAN_CTAG_RX |
 		NETIF_F_HW_VLAN_CTAG_TX;
 
+	if (priv->use_ncsi)
+		netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
+
 	/* AST2400  doesn't have working HW checksum generation */
 	if (np && (of_device_is_compatible(np, "aspeed,ast2400-mac")))
 		netdev->hw_features &= ~NETIF_F_HW_CSUM;

include/net/ncsi.h

@@ -28,6 +28,8 @@ struct ncsi_dev {
 };
 
 #ifdef CONFIG_NET_NCSI
+int ncsi_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid);
+int ncsi_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid);
 struct ncsi_dev *ncsi_register_dev(struct net_device *dev,
 				   void (*notifier)(struct ncsi_dev *nd));
 int ncsi_start_dev(struct ncsi_dev *nd);

net/ncsi/internal.h

@@ -180,6 +180,7 @@ struct ncsi_channel {
 #define NCSI_CHANNEL_INACTIVE		1
 #define NCSI_CHANNEL_ACTIVE		2
 #define NCSI_CHANNEL_INVISIBLE		3
+	bool                        reconfigure_needed;
 	spinlock_t                  lock;	/* Protect filters etc */
 	struct ncsi_package         *package;
 	struct ncsi_channel_version version;
@@ -235,6 +236,9 @@ enum {
 	ncsi_dev_state_probe_dp,
 	ncsi_dev_state_config_sp	= 0x0301,
 	ncsi_dev_state_config_cis,
+	ncsi_dev_state_config_clear_vids,
+	ncsi_dev_state_config_svf,
+	ncsi_dev_state_config_ev,
 	ncsi_dev_state_config_sma,
 	ncsi_dev_state_config_ebf,
 #if IS_ENABLED(CONFIG_IPV6)
@@ -253,6 +257,12 @@ enum {
 	ncsi_dev_state_suspend_done
 };
 
+struct vlan_vid {
+	struct list_head list;
+	__be16 proto;
+	u16 vid;
+};
+
 struct ncsi_dev_priv {
 	struct ncsi_dev     ndev;            /* Associated NCSI device     */
 	unsigned int        flags;           /* NCSI device flags          */
@@ -276,6 +286,7 @@ struct ncsi_dev_priv {
 	struct work_struct  work;            /* For channel management     */
 	struct packet_type  ptype;           /* NCSI packet Rx handler     */
 	struct list_head    node;            /* Form NCSI device list      */
+	struct list_head    vlan_vids;       /* List of active VLAN IDs */
 };
 
 struct ncsi_cmd_arg {

net/ncsi/ncsi-cmd.c

@@ -139,9 +139,9 @@ static int ncsi_cmd_handler_svf(struct sk_buff *skb,
 	struct ncsi_cmd_svf_pkt *cmd;
 
 	cmd = skb_put_zero(skb, sizeof(*cmd));
-	cmd->vlan = htons(nca->words[0]);
-	cmd->index = nca->bytes[2];
-	cmd->enable = nca->bytes[3];
+	cmd->vlan = htons(nca->words[1]);
+	cmd->index = nca->bytes[6];
+	cmd->enable = nca->bytes[7];
 	ncsi_cmd_build_header(&cmd->cmd.common, nca);
 
 	return 0;
@@ -153,7 +153,7 @@ static int ncsi_cmd_handler_ev(struct sk_buff *skb,
 	struct ncsi_cmd_ev_pkt *cmd;
 
 	cmd = skb_put_zero(skb, sizeof(*cmd));
-	cmd->mode = nca->bytes[0];
+	cmd->mode = nca->bytes[3];
 	ncsi_cmd_build_header(&cmd->cmd.common, nca);
 
 	return 0;
@@ -228,7 +228,7 @@ static struct ncsi_cmd_handler {
 	{ NCSI_PKT_CMD_AE,     8, ncsi_cmd_handler_ae      },
 	{ NCSI_PKT_CMD_SL,     8, ncsi_cmd_handler_sl      },
 	{ NCSI_PKT_CMD_GLS,    0, ncsi_cmd_handler_default },
-	{ NCSI_PKT_CMD_SVF,    4, ncsi_cmd_handler_svf     },
+	{ NCSI_PKT_CMD_SVF,    8, ncsi_cmd_handler_svf     },
 	{ NCSI_PKT_CMD_EV,     4, ncsi_cmd_handler_ev      },
 	{ NCSI_PKT_CMD_DV,     0, ncsi_cmd_handler_default },
 	{ NCSI_PKT_CMD_SMA,    8, ncsi_cmd_handler_sma     },

net/ncsi/ncsi-pkt.h

@@ -104,7 +104,7 @@ struct ncsi_cmd_svf_pkt {
 	unsigned char           index;     /* VLAN table index  */
 	unsigned char           enable;    /* Enable or disable */
 	__be32                  checksum;  /* Checksum          */
-	unsigned char           pad[14];
+	unsigned char           pad[18];
 };
 
 /* Enable VLAN */

net/ncsi/ncsi-rsp.c

@@ -354,7 +354,8 @@ static int ncsi_rsp_handler_svf(struct ncsi_request *nr)
 
 	/* Add or remove the VLAN filter */
 	if (!(cmd->enable & 0x1)) {
-		ret = ncsi_remove_filter(nc, NCSI_FILTER_VLAN, cmd->index);
+		/* HW indexes from 1 */
+		ret = ncsi_remove_filter(nc, NCSI_FILTER_VLAN, cmd->index - 1);
 	} else {
 		vlan = ntohs(cmd->vlan);
 		ret = ncsi_add_filter(nc, NCSI_FILTER_VLAN, &vlan);
@@ -693,7 +694,14 @@ static int ncsi_rsp_handler_gc(struct ncsi_request *nr)
 
 		ncf->index = i;
 		ncf->total = cnt;
-		ncf->bitmap = 0x0ul;
+		if (i == NCSI_FILTER_VLAN) {
+			/* Set VLAN filters active so they are cleared in
+			 * first configuration state
+			 */
+			ncf->bitmap = U64_MAX;
+		} else {
+			ncf->bitmap = 0x0ul;
+		}
 		nc->filters[i] = ncf;
 	}