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Message-Id: <20171018105935.12489-3-privat@egil-hjelmeland.no>
Date: Wed, 18 Oct 2017 12:59:35 +0200
From: Egil Hjelmeland <privat@...l-hjelmeland.no>
To: andrew@...n.ch, vivien.didelot@...oirfairelinux.com,
f.fainelli@...il.com, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org
Cc: Egil Hjelmeland <privat@...l-hjelmeland.no>
Subject: [PATCH net-next 2/2] net: dsa: lan9303: Add fdb/mdb manipulation
Add functions for managing the lan9303 ALR (Address Logic
Resolution).
Implement DSA methods: port_fdb_add, port_fdb_del, port_mdb_prepare,
port_mdb_add and port_mdb_del.
Since the lan9303 do not offer reading specific ALR entry, the driver
caches all static entries - in a flat table.
Signed-off-by: Egil Hjelmeland <privat@...l-hjelmeland.no>
---
drivers/net/dsa/lan9303-core.c | 175 +++++++++++++++++++++++++++++++++++++++++
drivers/net/dsa/lan9303.h | 9 +++
2 files changed, 184 insertions(+)
diff --git a/drivers/net/dsa/lan9303-core.c b/drivers/net/dsa/lan9303-core.c
index 8b5202f3c0b0..4177e9d2e8ae 100644
--- a/drivers/net/dsa/lan9303-core.c
+++ b/drivers/net/dsa/lan9303-core.c
@@ -19,6 +19,7 @@
#include <linux/mii.h>
#include <linux/phy.h>
#include <linux/if_bridge.h>
+#include <linux/etherdevice.h>
#include "lan9303.h"
@@ -499,6 +500,37 @@ static int lan9303_detect_phy_setup(struct lan9303 *chip)
static const int alrport_2_portmap[] = {1, 2, 4, 0, 3, 5, 6, 7 };
static const int portmap_2_alrport[] = {3, 0, 1, 4, 2, 5, 6, 7 };
+/* ALR: Cache static entries: mac address + port bitmap */
+
+/* Return pointer to first free ALR cache entry, return NULL if none */
+static struct lan9303_alr_cache_entry *
+lan9303_alr_cache_find_free(struct lan9303 *chip)
+{
+ int i;
+ struct lan9303_alr_cache_entry *entr = chip->alr_cache;
+
+ for (i = 0; i < LAN9303_NUM_ALR_RECORDS; i++, entr++)
+ if (entr->port_map == 0)
+ return entr;
+ return NULL;
+}
+
+/* Return pointer to ALR cache entry matching MAC address */
+static struct lan9303_alr_cache_entry *
+lan9303_alr_cache_find_mac(struct lan9303 *chip, const u8 *mac_addr)
+{
+ int i;
+ struct lan9303_alr_cache_entry *entr = chip->alr_cache;
+
+ BUILD_BUG_ON_MSG(sizeof(struct lan9303_alr_cache_entry) & 1,
+ "ether_addr_equal require u16 alignment");
+
+ for (i = 0; i < LAN9303_NUM_ALR_RECORDS; i++, entr++)
+ if (ether_addr_equal(entr->mac_addr, mac_addr))
+ return entr;
+ return NULL;
+}
+
/* ALR: Actual register access functions */
/* This function will wait a while until mask & reg == value */
@@ -610,6 +642,76 @@ static void alr_loop_cb_fdb_port_dump(struct lan9303 *chip, u32 dat0,
dump_ctx->cb(mac, 0, is_static, dump_ctx->data);
}
+/* ALR: Add/modify/delete ALR entries */
+
+/* Set a static ALR entry. Delete entry if port_map is zero */
+static void lan9303_alr_set_entry(struct lan9303 *chip, const u8 *mac,
+ u8 port_map, bool stp_override)
+{
+ u32 dat0, dat1, alr_port;
+
+ dev_dbg(chip->dev, "%s(%pM, %d)\n", __func__, mac, port_map);
+ dat1 = ALR_DAT1_STATIC;
+ if (port_map)
+ dat1 |= ALR_DAT1_VALID; /* otherwise no ports: delete entry */
+ if (stp_override)
+ dat1 |= ALR_DAT1_AGE_OVERRID;
+
+ alr_port = portmap_2_alrport[port_map & 7];
+ dat1 &= ~ALR_DAT1_PORT_MASK;
+ dat1 |= alr_port << ALR_DAT1_PORT_BITOFFS;
+
+ dat0 = 0;
+ dat0 |= (mac[0] << 0);
+ dat0 |= (mac[1] << 8);
+ dat0 |= (mac[2] << 16);
+ dat0 |= (mac[3] << 24);
+
+ dat1 |= (mac[4] << 0);
+ dat1 |= (mac[5] << 8);
+
+ lan9303_alr_make_entry_raw(chip, dat0, dat1);
+}
+
+/* Add port to static ALR entry, create new static entry if needed */
+static int lan9303_alr_add_port(struct lan9303 *chip, const u8 *mac,
+ int port, bool stp_override)
+{
+ struct lan9303_alr_cache_entry *entr;
+
+ entr = lan9303_alr_cache_find_mac(chip, mac);
+ if (!entr) { /*New entry */
+ entr = lan9303_alr_cache_find_free(chip);
+ if (!entr)
+ return -ENOSPC;
+ ether_addr_copy(entr->mac_addr, mac);
+ }
+ entr->port_map |= BIT(port);
+ entr->stp_override = stp_override;
+ lan9303_alr_set_entry(chip, mac, entr->port_map, stp_override);
+ return 0;
+}
+
+/* Delete static port from ALR entry, delete entry if last port */
+static int lan9303_alr_del_port(struct lan9303 *chip, const u8 *mac,
+ int port)
+{
+ struct lan9303_alr_cache_entry *entr;
+
+ entr = lan9303_alr_cache_find_mac(chip, mac);
+ if (!entr)
+ return 0; /* no static entry found */
+ /* Question: Should we delete any learned entry?
+ * { lan9303_alr_set_entry(chip, mac, 0, false); return 0; }
+ */
+
+ entr->port_map &= ~BIT(port);
+ if (entr->port_map == 0) /* zero means its free again */
+ eth_zero_addr(&entr->port_map);
+ lan9303_alr_set_entry(chip, mac, entr->port_map, entr->stp_override);
+ return 0;
+}
+
/* --------------------- Various chip setup ----------------------*/
static int lan9303_disable_processing_port(struct lan9303 *chip,
@@ -1065,6 +1167,30 @@ static void lan9303_port_fast_age(struct dsa_switch *ds, int port)
lan9303_alr_loop(chip, alr_loop_cb_del_port_learned, &port);
}
+static int lan9303_port_fdb_add(struct dsa_switch *ds, int port,
+ const unsigned char *addr, u16 vid)
+{
+ struct lan9303 *chip = ds->priv;
+
+ dev_dbg(chip->dev, "%s(%d, %pM, %d)\n", __func__, port, addr, vid);
+ if (vid)
+ return -EOPNOTSUPP;
+ return lan9303_alr_add_port(chip, addr, port, false);
+}
+
+static int lan9303_port_fdb_del(struct dsa_switch *ds, int port,
+ const unsigned char *addr, u16 vid)
+
+{
+ struct lan9303 *chip = ds->priv;
+
+ dev_dbg(chip->dev, "%s(%d, %pM, %d)\n", __func__, port, addr, vid);
+ if (vid)
+ return -EOPNOTSUPP;
+ lan9303_alr_del_port(chip, addr, port);
+ return 0;
+}
+
static int lan9303_port_fdb_dump(struct dsa_switch *ds, int port,
dsa_fdb_dump_cb_t *cb, void *data)
{
@@ -1080,6 +1206,50 @@ static int lan9303_port_fdb_dump(struct dsa_switch *ds, int port,
return 0;
}
+static int lan9303_port_mdb_prepare(
+ struct dsa_switch *ds, int port,
+ const struct switchdev_obj_port_mdb *mdb,
+ struct switchdev_trans *trans)
+{
+ struct lan9303 *chip = ds->priv;
+
+ dev_dbg(chip->dev, "%s(%d, %pM, %d)\n", __func__, port, mdb->addr,
+ mdb->vid);
+ if (mdb->vid)
+ return -EOPNOTSUPP;
+ if (lan9303_alr_cache_find_mac(chip, mdb->addr))
+ return 0;
+ if (!lan9303_alr_cache_find_free(chip))
+ return -ENOSPC;
+ return 0;
+}
+
+static void lan9303_port_mdb_add(
+ struct dsa_switch *ds, int port,
+ const struct switchdev_obj_port_mdb *mdb,
+ struct switchdev_trans *trans)
+{
+ struct lan9303 *chip = ds->priv;
+
+ dev_dbg(chip->dev, "%s(%d, %pM, %d)\n", __func__, port, mdb->addr,
+ mdb->vid);
+ lan9303_alr_add_port(chip, mdb->addr, port, false);
+}
+
+static int lan9303_port_mdb_del(
+ struct dsa_switch *ds, int port,
+ const struct switchdev_obj_port_mdb *mdb)
+{
+ struct lan9303 *chip = ds->priv;
+
+ dev_dbg(chip->dev, "%s(%d, %pM, %d)\n", __func__, port, mdb->addr,
+ mdb->vid);
+ if (mdb->vid)
+ return -EOPNOTSUPP;
+ lan9303_alr_del_port(chip, mdb->addr, port);
+ return 0;
+}
+
static const struct dsa_switch_ops lan9303_switch_ops = {
.get_tag_protocol = lan9303_get_tag_protocol,
.setup = lan9303_setup,
@@ -1095,7 +1265,12 @@ static const struct dsa_switch_ops lan9303_switch_ops = {
.port_bridge_leave = lan9303_port_bridge_leave,
.port_stp_state_set = lan9303_port_stp_state_set,
.port_fast_age = lan9303_port_fast_age,
+ .port_fdb_add = lan9303_port_fdb_add,
+ .port_fdb_del = lan9303_port_fdb_del,
.port_fdb_dump = lan9303_port_fdb_dump,
+ .port_mdb_prepare = lan9303_port_mdb_prepare,
+ .port_mdb_add = lan9303_port_mdb_add,
+ .port_mdb_del = lan9303_port_mdb_del,
};
static int lan9303_register_switch(struct lan9303 *chip)
diff --git a/drivers/net/dsa/lan9303.h b/drivers/net/dsa/lan9303.h
index 4db323d65741..d807b1be35f2 100644
--- a/drivers/net/dsa/lan9303.h
+++ b/drivers/net/dsa/lan9303.h
@@ -12,6 +12,11 @@ struct lan9303_phy_ops {
};
#define LAN9303_NUM_ALR_RECORDS 512
+struct lan9303_alr_cache_entry {
+ u8 mac_addr[ETH_ALEN];
+ u8 port_map; /* Bitmap of ports. Zero if unused entry */
+ u8 stp_override; /* non zero if set ALR_DAT1_AGE_OVERRID */
+};
struct lan9303 {
struct device *dev;
@@ -25,6 +30,10 @@ struct lan9303 {
const struct lan9303_phy_ops *ops;
bool is_bridged; /* true if port 1 and 2 are bridged */
u32 swe_port_state; /* remember SWE_PORT_STATE while not bridged */
+ /* LAN9303 do not offer reading specific ALR entry. Cache all
+ * static entries in a flat table
+ **/
+ struct lan9303_alr_cache_entry alr_cache[LAN9303_NUM_ALR_RECORDS];
};
extern const struct regmap_access_table lan9303_register_set;
--
2.11.0
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