[RFC v2 net-next 1/8] net: mscc: ocelot: add MAC table write and lookup operations
From: Xiaoliang Yang <hidden>
Date: 2021-08-18 06:09:45
Also in:
lkml
Subsystem:
networking drivers, ocelot ethernet switch driver, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Vladimir Oltean, Linus Torvalds
From: Vladimir Oltean <vladimir.oltean@nxp.com>
ocelot_mact_write() can be used for directly modifying an FDB entry
situated at a given row and column, as opposed to the current
ocelot_mact_learn() which calculates the row and column indices
automatically (based on a 11-bit hash derived from the {DMAC, VID} key).
ocelot_mact_lookup() can be used to retrieve the row and column at which
an FDB entry with the given {DMAC, VID} key is found.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
drivers/net/ethernet/mscc/ocelot.c | 47 ++++++++++++++++++++++++++++++
1 file changed, 47 insertions(+)
diff --git a/drivers/net/ethernet/mscc/ocelot.c b/drivers/net/ethernet/mscc/ocelot.c
index adfb9781799e..0241272e9ce9 100644
--- a/drivers/net/ethernet/mscc/ocelot.c
+++ b/drivers/net/ethernet/mscc/ocelot.c@@ -102,6 +102,53 @@ int ocelot_mact_forget(struct ocelot *ocelot, } EXPORT_SYMBOL(ocelot_mact_forget); +int ocelot_mact_lookup(struct ocelot *ocelot, const unsigned char mac[ETH_ALEN], + unsigned int vid, int *row, int *col) +{ + int val; + + ocelot_mact_select(ocelot, mac, vid); + + /* Issue a read command with MACACCESS_VALID=1. */ + ocelot_write(ocelot, ANA_TABLES_MACACCESS_VALID | + ANA_TABLES_MACACCESS_MAC_TABLE_CMD(MACACCESS_CMD_READ), + ANA_TABLES_MACACCESS); + + if (ocelot_mact_wait_for_completion(ocelot)) + return -ETIMEDOUT; + + /* Read back the entry flags */ + val = ocelot_read(ocelot, ANA_TABLES_MACACCESS); + if (!(val & ANA_TABLES_MACACCESS_VALID)) + return -ENOENT; + + ocelot_field_read(ocelot, ANA_TABLES_MACTINDX_M_INDEX, row); + ocelot_field_read(ocelot, ANA_TABLES_MACTINDX_BUCKET, col); + + return 0; +} +EXPORT_SYMBOL(ocelot_mact_lookup); + +/* Like ocelot_mact_learn, except at a specific row and col. */ +void ocelot_mact_write(struct ocelot *ocelot, int port, + const struct ocelot_mact_entry *entry, + int row, int col) +{ + ocelot_mact_select(ocelot, entry->mac, entry->vid); + + ocelot_field_write(ocelot, ANA_TABLES_MACTINDX_M_INDEX, row); + ocelot_field_write(ocelot, ANA_TABLES_MACTINDX_BUCKET, col); + + ocelot_write(ocelot, ANA_TABLES_MACACCESS_VALID | + ANA_TABLES_MACACCESS_ENTRYTYPE(entry->type) | + ANA_TABLES_MACACCESS_DEST_IDX(port) | + ANA_TABLES_MACACCESS_MAC_TABLE_CMD(MACACCESS_CMD_WRITE), + ANA_TABLES_MACACCESS); + + ocelot_mact_wait_for_completion(ocelot); +} +EXPORT_SYMBOL(ocelot_mact_write); + static void ocelot_mact_init(struct ocelot *ocelot) { /* Configure the learning mode entries attributes:
--
2.17.1