net: dsa: bcm_sf2: Fix number of CFP entries for BCM7278

BCM7278 has only 128 entries while BCM7445 has the full 256 entries set,
fix that.

Fixes: 7318166c ("net: dsa: bcm_sf2: Add support for ethtool::rxnfc")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/bcm_sf2.c

@@ -1048,6 +1048,7 @@ struct bcm_sf2_of_data {
 	u32 type;
 	const u16 *reg_offsets;
 	unsigned int core_reg_align;
+	unsigned int num_cfp_rules;
 };
 
 /* Register offsets for the SWITCH_REG_* block */
@@ -1071,6 +1072,7 @@ static const struct bcm_sf2_of_data bcm_sf2_7445_data = {
 	.type		= BCM7445_DEVICE_ID,
 	.core_reg_align	= 0,
 	.reg_offsets	= bcm_sf2_7445_reg_offsets,
+	.num_cfp_rules	= 256,
 };
 
 static const u16 bcm_sf2_7278_reg_offsets[] = {
@@ -1093,6 +1095,7 @@ static const struct bcm_sf2_of_data bcm_sf2_7278_data = {
 	.type		= BCM7278_DEVICE_ID,
 	.core_reg_align	= 1,
 	.reg_offsets	= bcm_sf2_7278_reg_offsets,
+	.num_cfp_rules	= 128,
 };
 
 static const struct of_device_id bcm_sf2_of_match[] = {
@@ -1149,6 +1152,7 @@ static int bcm_sf2_sw_probe(struct platform_device *pdev)
 	priv->type = data->type;
 	priv->reg_offsets = data->reg_offsets;
 	priv->core_reg_align = data->core_reg_align;
+	priv->num_cfp_rules = data->num_cfp_rules;
 
 	/* Auto-detection using standard registers will not work, so
 	 * provide an indication of what kind of device we are for

drivers/net/dsa/bcm_sf2.h

@@ -72,6 +72,7 @@ struct bcm_sf2_priv {
 	u32 				type;
 	const u16			*reg_offsets;
 	unsigned int			core_reg_align;
+	unsigned int			num_cfp_rules;
 
 	/* spinlock protecting access to the indirect registers */
 	spinlock_t			indir_lock;

drivers/net/dsa/bcm_sf2_cfp.c

@@ -98,7 +98,7 @@ static inline void bcm_sf2_cfp_rule_addr_set(struct bcm_sf2_priv *priv,
 {
 	u32 reg;
 
-	WARN_ON(addr >= CFP_NUM_RULES);
+	WARN_ON(addr >= priv->num_cfp_rules);
 
 	reg = core_readl(priv, CORE_CFP_ACC);
 	reg &= ~(XCESS_ADDR_MASK << XCESS_ADDR_SHIFT);
@@ -109,7 +109,7 @@ static inline void bcm_sf2_cfp_rule_addr_set(struct bcm_sf2_priv *priv,
 static inline unsigned int bcm_sf2_cfp_rule_size(struct bcm_sf2_priv *priv)
 {
 	/* Entry #0 is reserved */
-	return CFP_NUM_RULES - 1;
+	return priv->num_cfp_rules - 1;
 }
 
 static int bcm_sf2_cfp_rule_set(struct dsa_switch *ds, int port,
@@ -523,7 +523,7 @@ static int bcm_sf2_cfp_rule_get_all(struct bcm_sf2_priv *priv,
 		if (!(reg & OP_STR_DONE))
 			break;
 
-	} while (index < CFP_NUM_RULES);
+	} while (index < priv->num_cfp_rules);
 
 	/* Put the TCAM size here */
 	nfc->data = bcm_sf2_cfp_rule_size(priv);
@@ -544,7 +544,7 @@ int bcm_sf2_get_rxnfc(struct dsa_switch *ds, int port,
 	case ETHTOOL_GRXCLSRLCNT:
 		/* Subtract the default, unusable rule */
 		nfc->rule_cnt = bitmap_weight(priv->cfp.used,
-					      CFP_NUM_RULES) - 1;
+					      priv->num_cfp_rules) - 1;
 		/* We support specifying rule locations */
 		nfc->data |= RX_CLS_LOC_SPECIAL;
 		break;