path: root/drivers/net/dsa/bcm_sf2.c

/*
 * Broadcom Starfighter 2 DSA switch driver
 *
 * Copyright (C) 2014, Broadcom Corporation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#include <linux/list.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/of.h>
#include <linux/phy.h>
#include <linux/phy_fixed.h>
#include <linux/mii.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/of_address.h>
#include <net/dsa.h>
#include <linux/ethtool.h>
#include <linux/if_bridge.h>

#include "bcm_sf2.h"
#include "bcm_sf2_regs.h"

/* String, offset, and register size in bytes if different from 4 bytes */
static const struct bcm_sf2_hw_stats bcm_sf2_mib[] = {
	{ "TxOctets",		0x000, 8	},
	{ "TxDropPkts",		0x020		},
	{ "TxQPKTQ0",		0x030		},
	{ "TxBroadcastPkts",	0x040		},
	{ "TxMulticastPkts",	0x050		},
	{ "TxUnicastPKts",	0x060		},
	{ "TxCollisions",	0x070		},
	{ "TxSingleCollision",	0x080		},
	{ "TxMultipleCollision", 0x090		},
	{ "TxDeferredCollision", 0x0a0		},
	{ "TxLateCollision",	0x0b0		},
	{ "TxExcessiveCollision", 0x0c0		},
	{ "TxFrameInDisc",	0x0d0		},
	{ "TxPausePkts",	0x0e0		},
	{ "TxQPKTQ1",		0x0f0		},
	{ "TxQPKTQ2",		0x100		},
	{ "TxQPKTQ3",		0x110		},
	{ "TxQPKTQ4",		0x120		},
	{ "TxQPKTQ5",		0x130		},
	{ "RxOctets",		0x140, 8	},
	{ "RxUndersizePkts",	0x160		},
	{ "RxPausePkts",	0x170		},
	{ "RxPkts64Octets",	0x180		},
	{ "RxPkts65to127Octets", 0x190		},
	{ "RxPkts128to255Octets", 0x1a0		},
	{ "RxPkts256to511Octets", 0x1b0		},
	{ "RxPkts512to1023Octets", 0x1c0	},
	{ "RxPkts1024toMaxPktsOctets", 0x1d0	},
	{ "RxOversizePkts",	0x1e0		},
	{ "RxJabbers",		0x1f0		},
	{ "RxAlignmentErrors",	0x200		},
	{ "RxFCSErrors",	0x210		},
	{ "RxGoodOctets",	0x220, 8	},
	{ "RxDropPkts",		0x240		},
	{ "RxUnicastPkts",	0x250		},
	{ "RxMulticastPkts",	0x260		},
	{ "RxBroadcastPkts",	0x270		},
	{ "RxSAChanges",	0x280		},
	{ "RxFragments",	0x290		},
	{ "RxJumboPkt",		0x2a0		},
	{ "RxSymblErr",		0x2b0		},
	{ "InRangeErrCount",	0x2c0		},
	{ "OutRangeErrCount",	0x2d0		},
	{ "EEELpiEvent",	0x2e0		},
	{ "EEELpiDuration",	0x2f0		},
	{ "RxDiscard",		0x300, 8	},
	{ "TxQPKTQ6",		0x320		},
	{ "TxQPKTQ7",		0x330		},
	{ "TxPkts64Octets",	0x340		},
	{ "TxPkts65to127Octets", 0x350		},
	{ "TxPkts128to255Octets", 0x360		},
	{ "TxPkts256to511Ocets", 0x370		},
	{ "TxPkts512to1023Ocets", 0x380		},
	{ "TxPkts1024toMaxPktOcets", 0x390	},
};

#define BCM_SF2_STATS_SIZE	ARRAY_SIZE(bcm_sf2_mib)

static void bcm_sf2_sw_get_strings(struct dsa_switch *ds,
				   int port, uint8_t *data)
{
	unsigned int i;

	for (i = 0; i < BCM_SF2_STATS_SIZE; i++)
		memcpy(data + i * ETH_GSTRING_LEN,
		       bcm_sf2_mib[i].string, ETH_GSTRING_LEN);
}

static void bcm_sf2_sw_get_ethtool_stats(struct dsa_switch *ds,
					 int port, uint64_t *data)
{
	struct bcm_sf2_priv *priv = ds_to_priv(ds);
	const struct bcm_sf2_hw_stats *s;
	unsigned int i;
	u64 val = 0;
	u32 offset;

	mutex_lock(&priv->stats_mutex);

	/* Now fetch the per-port counters */
	for (i = 0; i < BCM_SF2_STATS_SIZE; i++) {
		s = &bcm_sf2_mib[i];

		/* Do a latched 64-bit read if needed */
		offset = s->reg + CORE_P_MIB_OFFSET(port);
		if (s->sizeof_stat == 8)
			val = core_readq(priv, offset);
		else
			val = core_readl(priv, offset);

		data[i] = (u64)val;
	}

	mutex_unlock(&priv->stats_mutex);
}

static int bcm_sf2_sw_get_sset_count(struct dsa_switch *ds)
{
	return BCM_SF2_STATS_SIZE;
}

static char *bcm_sf2_sw_probe(struct device *host_dev, int sw_addr)
{
	return "Broadcom Starfighter 2";
}

static void bcm_sf2_imp_vlan_setup(struct dsa_switch *ds, int cpu_port)
{
	struct bcm_sf2_priv *priv = ds_to_priv(ds);
	unsigned int i;
	u32 reg;

	/* Enable the IMP Port to be in the same VLAN as the other ports
	 * on a per-port basis such that we only have Port i and IMP in
	 * the same VLAN.
	 */
	for (i = 0; i < priv->hw_params.num_ports; i++) {
		if (!((1 << i) & ds->phys_port_mask