Merge branch 'net-dsa-bcm_sf2-Store-rules-in-lists'

Florian Fainelli says:

====================
net: dsa: bcm_sf2: Store rules in lists

This patch series changes the bcm-sf2 driver to keep a copy of the
inserted rules as opposed to using the HW as a storage area for a number
of reasons:

- this helps us with doing duplicate rule detection in a faster way, it
  would have required a full rule read before

- this helps with Pablo's on-going work to convert ethtool_rx_flow_spec
  to a more generic flow rule structure by having fewer code paths to
  convert to the new structure/helpers

- we need to cache copies to restore them during drive resumption,
  because depending on the low power mode the system has entered, the
  switch may have lost all of its context
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/bcm_sf2.c

@@ -710,6 +710,10 @@ static int bcm_sf2_sw_resume(struct dsa_switch *ds)
 		return ret;
 	}
 
+	ret = bcm_sf2_cfp_resume(ds);
+	if (ret)
+		return ret;
+
 	if (priv->hw_params.num_gphy == 1)
 		bcm_sf2_gphy_enable_set(ds, true);
 
@@ -1061,6 +1065,7 @@ 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);
+	INIT_LIST_HEAD(&priv->cfp.rules_list);
 
 	/* CFP rule #0 cannot be used for specific classifications, flag it as
 	 * permanently used
@@ -1166,6 +1171,7 @@ static int bcm_sf2_sw_remove(struct platform_device *pdev)
 
 	priv->wol_ports_mask = 0;
 	dsa_unregister_switch(priv->dev->ds);
+	bcm_sf2_cfp_exit(priv->dev->ds);
 	/* Disable all ports and interrupts */
 	bcm_sf2_sw_suspend(priv->dev->ds);
 	bcm_sf2_mdio_unregister(priv);

drivers/net/dsa/bcm_sf2.h

@@ -56,6 +56,7 @@ struct bcm_sf2_cfp_priv {
 	DECLARE_BITMAP(used, CFP_NUM_RULES);
 	DECLARE_BITMAP(unique, CFP_NUM_RULES);
 	unsigned int rules_cnt;
+	struct list_head rules_list;
 };
 
 struct bcm_sf2_priv {
@@ -213,5 +214,7 @@ int bcm_sf2_get_rxnfc(struct dsa_switch *ds, int port,
 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);
+void bcm_sf2_cfp_exit(struct dsa_switch *ds);
+int bcm_sf2_cfp_resume(struct dsa_switch *ds);
 
 #endif /* __BCM_SF2_H */

drivers/net/ethernet/broadcom/bcmsysport.c

@@ -1068,6 +1068,7 @@ static void mpd_enable_set(struct bcm_sysport_priv *priv, bool enable)
 
 static void bcm_sysport_resume_from_wol(struct bcm_sysport_priv *priv)
 {
+	unsigned int index;
 	u32 reg;
 
 	/* Disable RXCHK, active filters and Broadcom tag matching */
@@ -1076,6 +1077,15 @@ static void bcm_sysport_resume_from_wol(struct bcm_sysport_priv *priv)
 		 RXCHK_BRCM_TAG_MATCH_SHIFT | RXCHK_EN | RXCHK_BRCM_TAG_EN);
 	rxchk_writel(priv, reg, RXCHK_CONTROL);
 
+	/* Make sure we restore correct CID index in case HW lost
+	 * its context during deep idle state
+	 */
+	for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
+		rxchk_writel(priv, priv->filters_loc[index] <<
+			     RXCHK_BRCM_TAG_CID_SHIFT, RXCHK_BRCM_TAG(index));
+		rxchk_writel(priv, 0xff00ffff, RXCHK_BRCM_TAG_MASK(index));
+	}
+
 	/* Clear the MagicPacket detection logic */
 	mpd_enable_set(priv, false);
 
@@ -2189,6 +2199,7 @@ static int bcm_sysport_rule_set(struct bcm_sysport_priv *priv,
 	rxchk_writel(priv, reg, RXCHK_BRCM_TAG(index));
 	rxchk_writel(priv, 0xff00ffff, RXCHK_BRCM_TAG_MASK(index));
 
+	priv->filters_loc[index] = nfc->fs.location;
 	set_bit(index, priv->filters);
 
 	return 0;
@@ -2208,6 +2219,7 @@ static int bcm_sysport_rule_del(struct bcm_sysport_priv *priv,
 	 * be taken care of during suspend time by bcm_sysport_suspend_to_wol
 	 */
 	clear_bit(index, priv->filters);
+	priv->filters_loc[index] = 0;
 
 	return 0;
 }

drivers/net/ethernet/broadcom/bcmsysport.h

@@ -786,6 +786,7 @@ struct bcm_sysport_priv {
 	/* Ethtool */
 	u32			msg_enable;
 	DECLARE_BITMAP(filters, RXCHK_BRCM_TAG_MAX);
+	u32			filters_loc[RXCHK_BRCM_TAG_MAX];
 
 	struct bcm_sysport_stats64	stats64;