[linux-2.6-block.git] / net / dsa / master.c

/*
 * Handling of a master device, switching frames via its switch fabric CPU port
 *
 * Copyright (c) 2017 Savoir-faire Linux Inc.
 *	Vivien Didelot <vivien.didelot@savoirfairelinux.com>
 *
 * 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 "dsa_priv.h"

static void dsa_master_get_ethtool_stats(struct net_device *dev,
					 struct ethtool_stats *stats,
					 uint64_t *data)
{
	struct dsa_port *cpu_dp = dev->dsa_ptr;
	const struct ethtool_ops *ops = cpu_dp->orig_ethtool_ops;
	struct dsa_switch *ds = cpu_dp->ds;
	int port = cpu_dp->index;
	int count = 0;

	if (ops->get_sset_count && ops->get_ethtool_stats) {
		count = ops->get_sset_count(dev, ETH_SS_STATS);
		ops->get_ethtool_stats(dev, stats, data);
	}

	if (ds->ops->get_ethtool_stats)
		ds->ops->get_ethtool_stats(ds, port, data + count);
}

static void dsa_master_get_ethtool_phy_stats(struct net_device *dev,
					     struct ethtool_stats *stats,
					     uint64_t *data)
{
	struct dsa_port *cpu_dp = dev->dsa_ptr;
	const struct ethtool_ops *ops = cpu_dp->orig_ethtool_ops;
	struct dsa_switch *ds = cpu_dp->ds;
	int port = cpu_dp->index;
	int count = 0;

	if (dev->phydev && !ops->get_ethtool_phy_stats) {
		count = phy_ethtool_get_sset_count(dev->phydev);
		if (count >= 0)
			phy_ethtool_get_stats(dev->phydev, stats, data);
	} else if (ops->get_sset_count && ops->get_ethtool_phy_stats) {
		count = ops->get_sset_count(dev, ETH_SS_PHY_STATS);
		ops->get_ethtool_phy_stats(dev, stats, data);
	}

	if (count < 0)
		count = 0;

	if (ds->ops->get_ethtool_phy_stats)
		ds->ops->get_ethtool_phy_stats(ds, port, data + count);
}

static int dsa_master_get_sset_count(struct net_device *dev, int sset)
{
	struct dsa_port *cpu_dp = dev->dsa_ptr;
	const struct ethtool_ops *ops = cpu_dp->orig_ethtool_ops;
	struct dsa_switch *ds = cpu_dp->ds;
	int count = 0;

	if (sset == ETH_SS_PHY_STATS && dev->phydev &&
	    !ops->get_ethtool_phy_stats)
		count = phy_ethtool_get_sset_count(dev->phydev);
	else if (ops->get_sset_count)
		count = ops->get_sset_count(dev, sset);

	if (count < 0)
		count = 0;

	if (ds->ops->get_sset_count)
		count += ds->ops->get_sset_count(ds, cpu_dp->index, sset);

	return count;
}

static void dsa_master_get_strings(struct net_device *dev, uint32_t stringset,
				   uint8_t *data)
{
	struct dsa_port *cpu_dp = dev->dsa_ptr;
	const struct ethtool_ops *ops = cpu_dp->orig_ethtool_ops;
	struct dsa_switch *ds = cpu_dp->ds;
	int port = cpu_dp->index;
	int len = ETH_GSTRING_LEN;
	int mcount = 0, count;
	unsigned int i;
	uint8_t pfx[4];
	uint8_t *ndata;

	snprintf(pfx, sizeof(pfx), "p%.2d", port);
	/* We do not want to be NULL-terminated, since this is a prefix */
	pfx[sizeof(pfx) - 1] = '_';

	if (stringset == ETH_SS_PHY_STATS && dev->phydev &&
	    !ops->get_ethtool_phy_stats) {
		mcount = phy_ethtool_get_sset_count(dev->phydev);
		if (mcount < 0)
			mcount = 0;
		else
			phy_ethtool_get_strings(dev->phydev, data);
	} else if (ops->get_sset_count && ops->get_strings) {
		mcount = ops->get_sset_count(dev, stringset);
		if (mcount < 0)
			mcount = 0;
		ops->get_strings(dev, stringset, data);
	}

	if (ds->ops->get_strings) {
		ndata = data + mcount * len;
		/* This function copies ETH_GSTRINGS_LEN bytes, we will mangle
		 * the output after to prepend our CPU port prefix we
		 * constructed earlier
		 */
		ds->ops->get_strings(ds, port, stringset, ndata);
		count = ds->ops->get_sset_count(ds, port, stringset);
		for (i = 0; i < count; i++) {
			memmove(ndata + (i * len + sizeof(pfx)),
				ndata + i * len, len - sizeof(pfx));
			memcpy(ndata + i * len, pfx, sizeof(pfx));
		}
	}
}

static int dsa_master_ethtool_setup(struct net_device *dev)
{
	struct dsa_port *cpu_dp = dev->dsa_ptr;
	struct dsa_switch *ds = cpu_dp->ds;
	struct ethtool_ops *ops;

	ops = devm_kzalloc(ds->dev, sizeof(*ops), GFP_KERNEL);
	if (!ops)
		return -ENOMEM;

	cpu_dp->orig_ethtool_ops = dev->ethtool_ops;
	if (cpu_dp->orig_ethtool_ops)
		memcpy(ops, cpu_dp->orig_ethtool_ops, sizeof(*ops));

	ops->get_sset_count = dsa_master_get_sset_count;
	ops->get_ethtool_stats = dsa_master_get_ethtool_stats;
	ops->get_strings = dsa_master_get_strings;
	ops->get_ethtool_phy_stats = dsa_master_get_ethtool_phy_stats;

	dev->ethtool_ops = ops;

	return 0;
}

static void dsa_master_ethtool_teardown(struct net_device *dev)
{
	struct dsa_port *cpu_dp = dev->dsa_ptr;

	dev->ethtool_ops = cpu_dp->orig_ethtool_ops;
	cpu_dp->orig_ethtool_ops = NULL;
}

int dsa_master_setup(struct net_device *dev, struct dsa_port *cpu_dp)
{
	/* If we use a tagging format that doesn't have an ethertype
	 * field, make sure that all packets from this point on get
	 * sent to the tag format's receive function.
	 */
	wmb();

	dev->dsa_ptr = cpu_dp;

	return dsa_master_ethtool_setup(dev);
}

void dsa_master_teardown(struct net_device *dev)
{
	dsa_master_ethtool_teardown(dev);

	dev->dsa_ptr = NULL;

	/* If we used a tagging format that doesn't have an ethertype
	 * field, make sure that all packets from this point get sent
	 * without the tag and go through the regular receive path.
	 */
	wmb();
}
Commit	Line	Data
f2f23566 VD	1	/*
	2	* Handling of a master device, switching frames via its switch fabric CPU port
	3	*
	4	* Copyright (c) 2017 Savoir-faire Linux Inc.
	5	* Vivien Didelot <vivien.didelot@savoirfairelinux.com>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*/
	12
	13	#include "dsa_priv.h"
	14
	15	static void dsa_master_get_ethtool_stats(struct net_device *dev,
	16	struct ethtool_stats *stats,
	17	uint64_t *data)
	18	{
2f657a60	19	struct dsa_port *cpu_dp = dev->dsa_ptr;
7ec764ee VD	20	const struct ethtool_ops *ops = cpu_dp->orig_ethtool_ops;
	21	struct dsa_switch *ds = cpu_dp->ds;
	22	int port = cpu_dp->index;
f2f23566 VD	23	int count = 0;
f2f23566 VD	24
1d1e79f1	25	if (ops->get_sset_count && ops->get_ethtool_stats) {
f2f23566 VD	26	count = ops->get_sset_count(dev, ETH_SS_STATS);
	27	ops->get_ethtool_stats(dev, stats, data);
	28	}
	29
	30	if (ds->ops->get_ethtool_stats)
7ec764ee	31	ds->ops->get_ethtool_stats(ds, port, data + count);
f2f23566 VD	32	}
f2f23566 VD	33
cf963573 FF	34	static void dsa_master_get_ethtool_phy_stats(struct net_device *dev,
	35	struct ethtool_stats *stats,
	36	uint64_t *data)
	37	{
	38	struct dsa_port *cpu_dp = dev->dsa_ptr;
	39	const struct ethtool_ops *ops = cpu_dp->orig_ethtool_ops;
	40	struct dsa_switch *ds = cpu_dp->ds;
	41	int port = cpu_dp->index;
	42	int count = 0;
	43
	44	if (dev->phydev && !ops->get_ethtool_phy_stats) {
	45	count = phy_ethtool_get_sset_count(dev->phydev);
	46	if (count >= 0)
	47	phy_ethtool_get_stats(dev->phydev, stats, data);
	48	} else if (ops->get_sset_count && ops->get_ethtool_phy_stats) {
	49	count = ops->get_sset_count(dev, ETH_SS_PHY_STATS);
	50	ops->get_ethtool_phy_stats(dev, stats, data);
	51	}
	52
	53	if (count < 0)
	54	count = 0;
	55
	56	if (ds->ops->get_ethtool_phy_stats)
	57	ds->ops->get_ethtool_phy_stats(ds, port, data + count);
	58	}
	59
f2f23566 VD	60	static int dsa_master_get_sset_count(struct net_device *dev, int sset)
f2f23566 VD	61	{
2f657a60	62	struct dsa_port *cpu_dp = dev->dsa_ptr;
7ec764ee VD	63	const struct ethtool_ops *ops = cpu_dp->orig_ethtool_ops;
7ec764ee VD	64	struct dsa_switch *ds = cpu_dp->ds;
f2f23566 VD	65	int count = 0;
f2f23566 VD	66
cf963573 FF	67	if (sset == ETH_SS_PHY_STATS && dev->phydev &&
	68	!ops->get_ethtool_phy_stats)
	69	count = phy_ethtool_get_sset_count(dev->phydev);
	70	else if (ops->get_sset_count)
89f09048	71	count = ops->get_sset_count(dev, sset);
cf963573 FF	72
	73	if (count < 0)
	74	count = 0;
f2f23566	75
89f09048 FF	76	if (ds->ops->get_sset_count)
89f09048 FF	77	count += ds->ops->get_sset_count(ds, cpu_dp->index, sset);
f2f23566 VD	78
	79	return count;
	80	}
	81
	82	static void dsa_master_get_strings(struct net_device *dev, uint32_t stringset,
	83	uint8_t *data)
	84	{
2f657a60	85	struct dsa_port *cpu_dp = dev->dsa_ptr;
7ec764ee VD	86	const struct ethtool_ops *ops = cpu_dp->orig_ethtool_ops;
	87	struct dsa_switch *ds = cpu_dp->ds;
	88	int port = cpu_dp->index;
f2f23566 VD	89	int len = ETH_GSTRING_LEN;
	90	int mcount = 0, count;
	91	unsigned int i;
	92	uint8_t pfx[4];
	93	uint8_t *ndata;
	94
7ec764ee	95	snprintf(pfx, sizeof(pfx), "p%.2d", port);
f2f23566 VD	96	/* We do not want to be NULL-terminated, since this is a prefix */
	97	pfx[sizeof(pfx) - 1] = '_';
	98
cf963573 FF	99	if (stringset == ETH_SS_PHY_STATS && dev->phydev &&
	100	!ops->get_ethtool_phy_stats) {
	101	mcount = phy_ethtool_get_sset_count(dev->phydev);
	102	if (mcount < 0)
	103	mcount = 0;
	104	else
	105	phy_ethtool_get_strings(dev->phydev, data);
	106	} else if (ops->get_sset_count && ops->get_strings) {
89f09048 FF	107	mcount = ops->get_sset_count(dev, stringset);
	108	if (mcount < 0)
	109	mcount = 0;
f2f23566 VD	110	ops->get_strings(dev, stringset, data);
	111	}
	112
89f09048	113	if (ds->ops->get_strings) {
f2f23566 VD	114	ndata = data + mcount * len;
	115	/* This function copies ETH_GSTRINGS_LEN bytes, we will mangle
	116	* the output after to prepend our CPU port prefix we
	117	* constructed earlier
	118	*/
89f09048 FF	119	ds->ops->get_strings(ds, port, stringset, ndata);
89f09048 FF	120	count = ds->ops->get_sset_count(ds, port, stringset);
f2f23566 VD	121	for (i = 0; i < count; i++) {
	122	memmove(ndata + (i * len + sizeof(pfx)),
	123	ndata + i * len, len - sizeof(pfx));
	124	memcpy(ndata + i * len, pfx, sizeof(pfx));
	125	}
	126	}
	127	}
	128
17a22fcf	129	static int dsa_master_ethtool_setup(struct net_device *dev)
f2f23566	130	{
2f657a60	131	struct dsa_port *cpu_dp = dev->dsa_ptr;
7ec764ee	132	struct dsa_switch *ds = cpu_dp->ds;
f2f23566 VD	133	struct ethtool_ops *ops;
	134
	135	ops = devm_kzalloc(ds->dev, sizeof(*ops), GFP_KERNEL);
	136	if (!ops)
	137	return -ENOMEM;
	138
7ec764ee VD	139	cpu_dp->orig_ethtool_ops = dev->ethtool_ops;
	140	if (cpu_dp->orig_ethtool_ops)
	141	memcpy(ops, cpu_dp->orig_ethtool_ops, sizeof(*ops));
f2f23566 VD	142
	143	ops->get_sset_count = dsa_master_get_sset_count;
	144	ops->get_ethtool_stats = dsa_master_get_ethtool_stats;
	145	ops->get_strings = dsa_master_get_strings;
cf963573	146	ops->get_ethtool_phy_stats = dsa_master_get_ethtool_phy_stats;
f2f23566 VD	147
	148	dev->ethtool_ops = ops;
	149
	150	return 0;
	151	}
	152
17a22fcf	153	static void dsa_master_ethtool_teardown(struct net_device *dev)
f2f23566	154	{
2f657a60	155	struct dsa_port *cpu_dp = dev->dsa_ptr;
f2f23566	156
7ec764ee VD	157	dev->ethtool_ops = cpu_dp->orig_ethtool_ops;
7ec764ee VD	158	cpu_dp->orig_ethtool_ops = NULL;
f2f23566	159	}
17a22fcf VD	160
	161	int dsa_master_setup(struct net_device dev, struct dsa_port cpu_dp)
	162	{
	163	/* If we use a tagging format that doesn't have an ethertype
	164	* field, make sure that all packets from this point on get
	165	* sent to the tag format's receive function.
	166	*/
	167	wmb();
	168
	169	dev->dsa_ptr = cpu_dp;
	170
	171	return dsa_master_ethtool_setup(dev);
	172	}
	173
	174	void dsa_master_teardown(struct net_device *dev)
	175	{
	176	dsa_master_ethtool_teardown(dev);
	177
	178	dev->dsa_ptr = NULL;
	179
	180	/* If we used a tagging format that doesn't have an ethertype
	181	* field, make sure that all packets from this point get sent
	182	* without the tag and go through the regular receive path.
	183	*/
	184	wmb();
	185	}