Merge branch 'net-dsa-bcm_sf2-CFP-support'

Florian Fainelli says:

====================
net: dsa: bcm_sf2: CFP support

This patch series adds support for the Broadcom Compact Field Processor (CFP)
which is a classification and matching engine built into most Broadcom switches.

We support that using ethtool::rxnfc because it allows all known uses cases from
the users I support to work, and more importantly, it allows the selection of a
target rule index, which is later used by e.g: offloading hardware, this is an
essential feature that I could not find being supported with cls_* for instance.

Thanks!

Changes in v3:

- rebased against latest net-next/master after Vivien's changes

Changes in v2:

- fixed modular builds reported by kbuild test robot
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/Makefile

@@ -1,5 +1,6 @@
 obj-$(CONFIG_NET_DSA_MV88E6060) += mv88e6060.o
 obj-$(CONFIG_NET_DSA_BCM_SF2)	+= bcm_sf2.o
+bcm_sf2-objs			+= bcm_sf2_cfp.o
 obj-$(CONFIG_NET_DSA_QCA8K)	+= qca8k.o
 
 obj-y				+= b53/

drivers/net/dsa/bcm_sf2.c

@@ -229,6 +229,7 @@ static int bcm_sf2_port_setup(struct dsa_switch *ds, int port,
 {
 	struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
 	s8 cpu_port = ds->dst[ds->index].cpu_port;
+	unsigned int i;
 	u32 reg;
 
 	/* Clear the memory power down */
@@ -240,6 +241,14 @@ static int bcm_sf2_port_setup(struct dsa_switch *ds, int port,
 	if (priv->brcm_tag_mask & BIT(port))
 		bcm_sf2_brcm_hdr_setup(priv, port);
 
+	/* Configure Traffic Class to QoS mapping, allow each priority to map
+	 * to a different queue number
+	 */
+	reg = core_readl(priv, CORE_PORT_TC2_QOS_MAP_PORT(port));
+	for (i = 0; i < 8; i++)
+		reg |= i << (PRT_TO_QID_SHIFT * i);
+	core_writel(priv, reg, CORE_PORT_TC2_QOS_MAP_PORT(port));
+
 	/* Clear the Rx and Tx disable bits and set to no spanning tree */
 	core_writel(priv, 0, CORE_G_PCTL_PORT(port));
 
@@ -1036,6 +1045,8 @@ static const struct dsa_switch_ops bcm_sf2_ops = {
 	.port_fdb_dump		= b53_fdb_dump,
 	.port_fdb_add		= b53_fdb_add,
 	.port_fdb_del		= b53_fdb_del,
+	.get_rxnfc		= bcm_sf2_get_rxnfc,
+	.set_rxnfc		= bcm_sf2_set_rxnfc,
 };
 
 struct bcm_sf2_of_data {
@@ -1159,6 +1170,12 @@ static int bcm_sf2_sw_probe(struct platform_device *pdev)
 
 	spin_lock_init(&priv->indir_lock);
 	mutex_init(&priv->stats_mutex);
+	mutex_init(&priv->cfp.lock);
+
+	/* CFP rule #0 cannot be used for specific classifications, flag it as
+	 * permanently used
+	 */
+	set_bit(0, priv->cfp.used);
 
 	bcm_sf2_identify_ports(priv, dn->child);
 
@@ -1188,6 +1205,12 @@ static int bcm_sf2_sw_probe(struct platform_device *pdev)
 		return ret;
 	}
 
+	ret = bcm_sf2_cfp_rst(priv);
+	if (ret) {
+		pr_err("failed to reset CFP\n");
+		goto out_mdio;
+	}
+
 	/* Disable all interrupts and request them */
 	bcm_sf2_intr_disable(priv);
 

drivers/net/dsa/bcm_sf2.h

@@ -52,6 +52,13 @@ struct bcm_sf2_port_status {
 	struct ethtool_eee eee;
 };
 
+struct bcm_sf2_cfp_priv {
+	/* Mutex protecting concurrent accesses to the CFP registers */
+	struct mutex lock;
+	DECLARE_BITMAP(used, CFP_NUM_RULES);
+	unsigned int rules_cnt;
+};
+
 struct bcm_sf2_priv {
 	/* Base registers, keep those in order with BCM_SF2_REGS_NAME */
 	void __iomem			*core;
@@ -103,6 +110,9 @@ struct bcm_sf2_priv {
 
 	/* Bitmask of ports needing BRCM tags */
 	unsigned int			brcm_tag_mask;
+
+	/* CFP rules context */
+	struct bcm_sf2_cfp_priv		cfp;
 };
 
 static inline struct bcm_sf2_priv *bcm_sf2_to_priv(struct dsa_switch *ds)
@@ -197,4 +207,11 @@ SF2_IO_MACRO(acb);
 SWITCH_INTR_L2(0);
 SWITCH_INTR_L2(1);
 
+/* RXNFC */
+int bcm_sf2_get_rxnfc(struct dsa_switch *ds, int port,
+		      struct ethtool_rxnfc *nfc, u32 *rule_locs);
+int bcm_sf2_set_rxnfc(struct dsa_switch *ds, int port,
+		      struct ethtool_rxnfc *nfc);
+int bcm_sf2_cfp_rst(struct bcm_sf2_priv *priv);
+
 #endif /* __BCM_SF2_H */