Merge branch 'net-dsa-b53-ARL-improvements'

Florian Fainelli says:

====================
net: dsa: b53: ARL improvements

This patch series improves the b53 driver ARL search code by
renaming the ARL entries to be reflective of what they are: bins, and
then introduce the number of buckets so we can properly bound check ARL
searches.

The final patch removes an unused argument.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/b53/b53_common.c

@@ -1484,8 +1484,7 @@ static int b53_arl_rw_op(struct b53_device *dev, unsigned int op)
 }
 
 static int b53_arl_read(struct b53_device *dev, u64 mac,
-			u16 vid, struct b53_arl_entry *ent, u8 *idx,
-			bool is_valid)
+			u16 vid, struct b53_arl_entry *ent, u8 *idx)
 {
 	DECLARE_BITMAP(free_bins, B53_ARLTBL_MAX_BIN_ENTRIES);
 	unsigned int i;
@@ -1495,10 +1494,10 @@ static int b53_arl_read(struct b53_device *dev, u64 mac,
 	if (ret)
 		return ret;
 
-	bitmap_zero(free_bins, dev->num_arl_entries);
+	bitmap_zero(free_bins, dev->num_arl_bins);
 
 	/* Read the bins */
-	for (i = 0; i < dev->num_arl_entries; i++) {
+	for (i = 0; i < dev->num_arl_bins; i++) {
 		u64 mac_vid;
 		u32 fwd_entry;
 
@@ -1521,10 +1520,10 @@ static int b53_arl_read(struct b53_device *dev, u64 mac,
 		return 0;
 	}
 
-	if (bitmap_weight(free_bins, dev->num_arl_entries) == 0)
+	if (bitmap_weight(free_bins, dev->num_arl_bins) == 0)
 		return -ENOSPC;
 
-	*idx = find_first_bit(free_bins, dev->num_arl_entries);
+	*idx = find_first_bit(free_bins, dev->num_arl_bins);
 
 	return -ENOENT;
 }
@@ -1550,7 +1549,8 @@ static int b53_arl_op(struct b53_device *dev, int op, int port,
 	if (ret)
 		return ret;
 
-	ret = b53_arl_read(dev, mac, vid, &ent, &idx, is_valid);
+	ret = b53_arl_read(dev, mac, vid, &ent, &idx);
+
 	/* If this is a read, just finish now */
 	if (op)
 		return ret;
@@ -1692,7 +1692,7 @@ int b53_fdb_dump(struct dsa_switch *ds, int port,
 		if (ret)
 			return ret;
 
-		if (priv->num_arl_entries > 2) {
+		if (priv->num_arl_bins > 2) {
 			b53_arl_search_rd(priv, 1, &results[1]);
 			ret = b53_fdb_copy(port, &results[1], cb, data);
 			if (ret)
@@ -1702,7 +1702,7 @@ int b53_fdb_dump(struct dsa_switch *ds, int port,
 				break;
 		}
 
-	} while (count++ < 1024);
+	} while (count++ < b53_max_arl_entries(priv) / 2);
 
 	return 0;
 }
@@ -2185,7 +2185,8 @@ struct b53_chip_data {
 	u16 enabled_ports;
 	u8 cpu_port;
 	u8 vta_regs[3];
-	u8 arl_entries;
+	u8 arl_bins;
+	u16 arl_buckets;
 	u8 duplex_reg;
 	u8 jumbo_pm_reg;
 	u8 jumbo_size_reg;
@@ -2204,7 +2205,8 @@ static const struct b53_chip_data b53_switch_chips[] = {
 		.dev_name = "BCM5325",
 		.vlans = 16,
 		.enabled_ports = 0x1f,
-		.arl_entries = 2,
+		.arl_bins = 2,
+		.arl_buckets = 1024,
 		.cpu_port = B53_CPU_PORT_25,
 		.duplex_reg = B53_DUPLEX_STAT_FE,
 	},
@@ -2213,7 +2215,8 @@ static const struct b53_chip_data b53_switch_chips[] = {
 		.dev_name = "BCM5365",
 		.vlans = 256,
 		.enabled_ports = 0x1f,
-		.arl_entries = 2,
+		.arl_bins = 2,
+		.arl_buckets = 1024,
 		.cpu_port = B53_CPU_PORT_25,
 		.duplex_reg = B53_DUPLEX_STAT_FE,
 	},
@@ -2222,7 +2225,8 @@ static const struct b53_chip_data b53_switch_chips[] = {
 		.dev_name = "BCM5389",
 		.vlans = 4096,
 		.enabled_ports = 0x1f,
-		.arl_entries = 4,
+		.arl_bins = 4,
+		.arl_buckets = 1024,
 		.cpu_port = B53_CPU_PORT,
 		.vta_regs = B53_VTA_REGS,
 		.duplex_reg = B53_DUPLEX_STAT_GE,
@@ -2234,7 +2238,8 @@ static const struct b53_chip_data b53_switch_chips[] = {
 		.dev_name = "BCM5395",
 		.vlans = 4096,
 		.enabled_ports = 0x1f,
-		.arl_entries = 4,
+		.arl_bins = 4,
+		.arl_buckets = 1024,
 		.cpu_port = B53_CPU_PORT,
 		.vta_regs = B53_VTA_REGS,
 		.duplex_reg = B53_DUPLEX_STAT_GE,
@@ -2246,7 +2251,8 @@ static const struct b53_chip_data b53_switch_chips[] = {
 		.dev_name = "BCM5397",
 		.vlans = 4096,
 		.enabled_ports = 0x1f,
-		.arl_entries = 4,
+		.arl_bins = 4,
+		.arl_buckets = 1024,
 		.cpu_port = B53_CPU_PORT,
 		.vta_regs = B53_VTA_REGS_9798,
 		.duplex_reg = B53_DUPLEX_STAT_GE,
@@ -2258,7 +2264,8 @@ static const struct b53_chip_data b53_switch_chips[] = {
 		.dev_name = "BCM5398",
 		.vlans = 4096,
 		.enabled_ports = 0x7f,
-		.arl_entries = 4,
+		.arl_bins = 4,
+		.arl_buckets = 1024,
 		.cpu_port = B53_CPU_PORT,
 		.vta_regs = B53_VTA_REGS_9798,
 		.duplex_reg = B53_DUPLEX_STAT_GE,
@@ -2270,7 +2277,8 @@ static const struct b53_chip_data b53_switch_chips[] = {
 		.dev_name = "BCM53115",
 		.vlans = 4096,
 		.enabled_ports = 0x1f,
-		.arl_entries = 4,
+		.arl_bins = 4,
+		.arl_buckets = 1024,
 		.vta_regs = B53_VTA_REGS,
 		.cpu_port = B53_CPU_PORT,
 		.duplex_reg = B53_DUPLEX_STAT_GE,
@@ -2282,7 +2290,8 @@ static const struct b53_chip_data b53_switch_chips[] = {
 		.dev_name = "BCM53125",
 		.vlans = 4096,
 		.enabled_ports = 0xff,
-		.arl_entries = 4,
+		.arl_bins = 4,
+		.arl_buckets = 1024,
 		.cpu_port = B53_CPU_PORT,
 		.vta_regs = B53_VTA_REGS,
 		.duplex_reg = B53_DUPLEX_STAT_GE,
@@ -2294,7 +2303,8 @@ static const struct b53_chip_data b53_switch_chips[] = {
 		.dev_name = "BCM53128",
 		.vlans = 4096,
 		.enabled_ports = 0x1ff,
-		.arl_entries = 4,
+		.arl_bins = 4,
+		.arl_buckets = 1024,
 		.cpu_port = B53_CPU_PORT,
 		.vta_regs = B53_VTA_REGS,
 		.duplex_reg = B53_DUPLEX_STAT_GE,
@@ -2306,7 +2316,8 @@ static const struct b53_chip_data b53_switch_chips[] = {
 		.dev_name = "BCM63xx",
 		.vlans = 4096,
 		.enabled_ports = 0, /* pdata must provide them */
-		.arl_entries = 4,
+		.arl_bins = 4,
+		.arl_buckets = 1024,
 		.cpu_port = B53_CPU_PORT,
 		.vta_regs = B53_VTA_REGS_63XX,
 		.duplex_reg = B53_DUPLEX_STAT_63XX,
@@ -2318,7 +2329,8 @@ static const struct b53_chip_data b53_switch_chips[] = {
 		.dev_name = "BCM53010",
 		.vlans = 4096,
 		.enabled_ports = 0x1f,
-		.arl_entries = 4,
+		.arl_bins = 4,
+		.arl_buckets = 1024,
 		.cpu_port = B53_CPU_PORT_25, /* TODO: auto detect */
 		.vta_regs = B53_VTA_REGS,
 		.duplex_reg = B53_DUPLEX_STAT_GE,
@@ -2330,7 +2342,8 @@ static const struct b53_chip_data b53_switch_chips[] = {
 		.dev_name = "BCM53011",
 		.vlans = 4096,
 		.enabled_ports = 0x1bf,
-		.arl_entries = 4,
+		.arl_bins = 4,
+		.arl_buckets = 1024,
 		.cpu_port = B53_CPU_PORT_25, /* TODO: auto detect */
 		.vta_regs = B53_VTA_REGS,
 		.duplex_reg = B53_DUPLEX_STAT_GE,
@@ -2342,7 +2355,8 @@ static const struct b53_chip_data b53_switch_chips[] = {
 		.dev_name = "BCM53012",
 		.vlans = 4096,
 		.enabled_ports = 0x1bf,
-		.arl_entries = 4,
+		.arl_bins = 4,
+		.arl_buckets = 1024,
 		.cpu_port = B53_CPU_PORT_25, /* TODO: auto detect */
 		.vta_regs = B53_VTA_REGS,
 		.duplex_reg = B53_DUPLEX_STAT_GE,
@@ -2354,7 +2368,8 @@ static const struct b53_chip_data b53_switch_chips[] = {
 		.dev_name = "BCM53018",
 		.vlans = 4096,
 		.enabled_ports = 0x1f,
-		.arl_entries = 4,
+		.arl_bins = 4,
+		.arl_buckets = 1024,
 		.cpu_port = B53_CPU_PORT_25, /* TODO: auto detect */
 		.vta_regs = B53_VTA_REGS,
 		.duplex_reg = B53_DUPLEX_STAT_GE,
@@ -2366,7 +2381,8 @@ static const struct b53_chip_data b53_switch_chips[] = {
 		.dev_name = "BCM53019",
 		.vlans = 4096,
 		.enabled_ports = 0x1f,
-		.arl_entries = 4,
+		.arl_bins = 4,
+		.arl_buckets = 1024,
 		.cpu_port = B53_CPU_PORT_25, /* TODO: auto detect */
 		.vta_regs = B53_VTA_REGS,
 		.duplex_reg = B53_DUPLEX_STAT_GE,
@@ -2378,7 +2394,8 @@ static const struct b53_chip_data b53_switch_chips[] = {
 		.dev_name = "BCM585xx/586xx/88312",
 		.vlans	= 4096,
 		.enabled_ports = 0x1ff,
-		.arl_entries = 4,
+		.arl_bins = 4,
+		.arl_buckets = 1024,
 		.cpu_port = B53_CPU_PORT,
 		.vta_regs = B53_VTA_REGS,
 		.duplex_reg = B53_DUPLEX_STAT_GE,
@@ -2390,7 +2407,8 @@ static const struct b53_chip_data b53_switch_chips[] = {
 		.dev_name = "BCM583xx/11360",
 		.vlans = 4096,
 		.enabled_ports = 0x103,
-		.arl_entries = 4,
+		.arl_bins = 4,
+		.arl_buckets = 1024,
 		.cpu_port = B53_CPU_PORT,
 		.vta_regs = B53_VTA_REGS,
 		.duplex_reg = B53_DUPLEX_STAT_GE,
@@ -2402,7 +2420,8 @@ static const struct b53_chip_data b53_switch_chips[] = {
 		.dev_name = "BCM7445",
 		.vlans	= 4096,
 		.enabled_ports = 0x1ff,
-		.arl_entries = 4,
+		.arl_bins = 4,
+		.arl_buckets = 1024,
 		.cpu_port = B53_CPU_PORT,
 		.vta_regs = B53_VTA_REGS,
 		.duplex_reg = B53_DUPLEX_STAT_GE,
@@ -2414,7 +2433,8 @@ static const struct b53_chip_data b53_switch_chips[] = {
 		.dev_name = "BCM7278",
 		.vlans = 4096,
 		.enabled_ports = 0x1ff,
-		.arl_entries= 4,
+		.arl_bins = 4,
+		.arl_buckets = 256,
 		.cpu_port = B53_CPU_PORT,
 		.vta_regs = B53_VTA_REGS,
 		.duplex_reg = B53_DUPLEX_STAT_GE,
@@ -2442,7 +2462,8 @@ static int b53_switch_init(struct b53_device *dev)
 			dev->jumbo_pm_reg = chip->jumbo_pm_reg;
 			dev->cpu_port = chip->cpu_port;
 			dev->num_vlans = chip->vlans;
-			dev->num_arl_entries = chip->arl_entries;
+			dev->num_arl_bins = chip->arl_bins;
+			dev->num_arl_buckets = chip->arl_buckets;
 			break;
 		}
 	}

drivers/net/dsa/b53/b53_priv.h

@@ -117,7 +117,8 @@ struct b53_device {
 	u8 jumbo_pm_reg;
 	u8 jumbo_size_reg;
 	int reset_gpio;
-	u8 num_arl_entries;
+	u8 num_arl_bins;
+	u16 num_arl_buckets;
 	enum dsa_tag_protocol tag_protocol;
 
 	/* used ports mask */
@@ -212,6 +213,11 @@ static inline int is58xx(struct b53_device *dev)
 #define B53_CPU_PORT_25	5
 #define B53_CPU_PORT	8
 
+static inline unsigned int b53_max_arl_entries(struct b53_device *dev)
+{
+	return dev->num_arl_buckets * dev->num_arl_bins;
+}
+
 struct b53_device *b53_switch_alloc(struct device *base,
 				    const struct b53_io_ops *ops,
 				    void *priv);