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// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
/*
* Copyright (c) 2018 Microsemi Corporation
*/
#include <linux/bitops.h>
#include <linux/io.h>
#include "mscc_mac_table.h"
#define ANA_TABLES_MACACCESS_VALID BIT(11)
#define ANA_TABLES_MACACCESS_ENTRYTYPE(x) ((x) << 9)
#define ANA_TABLES_MACACCESS_DEST_IDX(x) ((x) << 3)
#define ANA_TABLES_MACACCESS_MAC_TABLE_CMD(x) (x)
#define ANA_TABLES_MACACCESS_MAC_TABLE_CMD_M GENMASK(2, 0)
#define MACACCESS_CMD_IDLE 0
#define MACACCESS_CMD_LEARN 1
/* MAC table entry types.
* ENTRYTYPE_NORMAL is subject to aging.
* ENTRYTYPE_LOCKED is not subject to aging.
*/
enum macaccess_entry_type {
ENTRYTYPE_NORMAL = 0,
ENTRYTYPE_LOCKED,
};
static int vlan_wait_for_completion(void __iomem *regs,
const unsigned long *mscc_mac_table_offset)
{
unsigned int val, timeout = 10;
/* Wait for the issued mac table command to be completed, or timeout.
* When the command read from ANA_TABLES_MACACCESS is
* MACACCESS_CMD_IDLE, the issued command completed successfully.
*/
do {
val = readl(regs +
mscc_mac_table_offset[MSCC_ANA_TABLES_MACACCESS]);
val &= ANA_TABLES_MACACCESS_MAC_TABLE_CMD_M;
} while (val != MACACCESS_CMD_IDLE && timeout--);
if (!timeout)
return -ETIMEDOUT;
return 0;
}
int mscc_mac_table_add(void __iomem *regs,
const unsigned long *mscc_mac_table_offset,
const unsigned char mac[ETH_LEN], int pgid)
{
u32 macl = 0, mach = 0;
/* Set the MAC address to handle and the vlan associated in a format
* understood by the hardware.
*/
mach |= MAC_VID << 16;
mach |= ((u32)mac[0]) << 8;
mach |= ((u32)mac[1]) << 0;
macl |= ((u32)mac[2]) << 24;
macl |= ((u32)mac[3]) << 16;
macl |= ((u32)mac[4]) << 8;
macl |= ((u32)mac[5]) << 0;
writel(macl, regs + mscc_mac_table_offset[MSCC_ANA_TABLES_MACLDATA]);
writel(mach, regs + mscc_mac_table_offset[MSCC_ANA_TABLES_MACHDATA]);
writel(ANA_TABLES_MACACCESS_VALID |
ANA_TABLES_MACACCESS_DEST_IDX(pgid) |
ANA_TABLES_MACACCESS_ENTRYTYPE(ENTRYTYPE_LOCKED) |
ANA_TABLES_MACACCESS_MAC_TABLE_CMD(MACACCESS_CMD_LEARN),
regs + mscc_mac_table_offset[MSCC_ANA_TABLES_MACACCESS]);
return vlan_wait_for_completion(regs, mscc_mac_table_offset);
}
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