[linux-block.git] / net / ethtool / rings.c

// SPDX-License-Identifier: GPL-2.0-only

#include "netlink.h"
#include "common.h"

struct rings_req_info {
	struct ethnl_req_info		base;
};

struct rings_reply_data {
	struct ethnl_reply_data		base;
	struct ethtool_ringparam	ringparam;
	struct kernel_ethtool_ringparam	kernel_ringparam;
};

#define RINGS_REPDATA(__reply_base) \
	container_of(__reply_base, struct rings_reply_data, base)

const struct nla_policy ethnl_rings_get_policy[] = {
	[ETHTOOL_A_RINGS_HEADER]		=
		NLA_POLICY_NESTED(ethnl_header_policy),
};

static int rings_prepare_data(const struct ethnl_req_info *req_base,
			      struct ethnl_reply_data *reply_base,
			      struct genl_info *info)
{
	struct rings_reply_data *data = RINGS_REPDATA(reply_base);
	struct netlink_ext_ack *extack = info ? info->extack : NULL;
	struct net_device *dev = reply_base->dev;
	int ret;

	if (!dev->ethtool_ops->get_ringparam)
		return -EOPNOTSUPP;
	ret = ethnl_ops_begin(dev);
	if (ret < 0)
		return ret;
	dev->ethtool_ops->get_ringparam(dev, &data->ringparam,
					&data->kernel_ringparam, extack);
	ethnl_ops_complete(dev);

	return 0;
}

static int rings_reply_size(const struct ethnl_req_info *req_base,
			    const struct ethnl_reply_data *reply_base)
{
	return nla_total_size(sizeof(u32)) +	/* _RINGS_RX_MAX */
	       nla_total_size(sizeof(u32)) +	/* _RINGS_RX_MINI_MAX */
	       nla_total_size(sizeof(u32)) +	/* _RINGS_RX_JUMBO_MAX */
	       nla_total_size(sizeof(u32)) +	/* _RINGS_TX_MAX */
	       nla_total_size(sizeof(u32)) +	/* _RINGS_RX */
	       nla_total_size(sizeof(u32)) +	/* _RINGS_RX_MINI */
	       nla_total_size(sizeof(u32)) +	/* _RINGS_RX_JUMBO */
	       nla_total_size(sizeof(u32)) +	/* _RINGS_TX */
	       nla_total_size(sizeof(u32)) +	/* _RINGS_RX_BUF_LEN */
	       nla_total_size(sizeof(u8))  +	/* _RINGS_TCP_DATA_SPLIT */
	       nla_total_size(sizeof(u32));	/* _RINGS_CQE_SIZE */
}

static int rings_fill_reply(struct sk_buff *skb,
			    const struct ethnl_req_info *req_base,
			    const struct ethnl_reply_data *reply_base)
{
	const struct rings_reply_data *data = RINGS_REPDATA(reply_base);
	const struct kernel_ethtool_ringparam *kr = &data->kernel_ringparam;
	const struct ethtool_ringparam *ringparam = &data->ringparam;

	WARN_ON(kr->tcp_data_split > ETHTOOL_TCP_DATA_SPLIT_ENABLED);

	if ((ringparam->rx_max_pending &&
	     (nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MAX,
			  ringparam->rx_max_pending) ||
	      nla_put_u32(skb, ETHTOOL_A_RINGS_RX,
			  ringparam->rx_pending))) ||
	    (ringparam->rx_mini_max_pending &&
	     (nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MINI_MAX,
			  ringparam->rx_mini_max_pending) ||
	      nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MINI,
			  ringparam->rx_mini_pending))) ||
	    (ringparam->rx_jumbo_max_pending &&
	     (nla_put_u32(skb, ETHTOOL_A_RINGS_RX_JUMBO_MAX,
			  ringparam->rx_jumbo_max_pending) ||
	      nla_put_u32(skb, ETHTOOL_A_RINGS_RX_JUMBO,
			  ringparam->rx_jumbo_pending))) ||
	    (ringparam->tx_max_pending &&
	     (nla_put_u32(skb, ETHTOOL_A_RINGS_TX_MAX,
			  ringparam->tx_max_pending) ||
	      nla_put_u32(skb, ETHTOOL_A_RINGS_TX,
			  ringparam->tx_pending)))  ||
	    (kr->rx_buf_len &&
	     (nla_put_u32(skb, ETHTOOL_A_RINGS_RX_BUF_LEN, kr->rx_buf_len))) ||
	    (kr->tcp_data_split &&
	     (nla_put_u8(skb, ETHTOOL_A_RINGS_TCP_DATA_SPLIT,
			 kr->tcp_data_split))) ||
	    (kr->cqe_size &&
	     (nla_put_u32(skb, ETHTOOL_A_RINGS_CQE_SIZE, kr->cqe_size))))
		return -EMSGSIZE;

	return 0;
}

const struct ethnl_request_ops ethnl_rings_request_ops = {
	.request_cmd		= ETHTOOL_MSG_RINGS_GET,
	.reply_cmd		= ETHTOOL_MSG_RINGS_GET_REPLY,
	.hdr_attr		= ETHTOOL_A_RINGS_HEADER,
	.req_info_size		= sizeof(struct rings_req_info),
	.reply_data_size	= sizeof(struct rings_reply_data),

	.prepare_data		= rings_prepare_data,
	.reply_size		= rings_reply_size,
	.fill_reply		= rings_fill_reply,
};

/* RINGS_SET */

const struct nla_policy ethnl_rings_set_policy[] = {
	[ETHTOOL_A_RINGS_HEADER]		=
		NLA_POLICY_NESTED(ethnl_header_policy),
	[ETHTOOL_A_RINGS_RX]			= { .type = NLA_U32 },
	[ETHTOOL_A_RINGS_RX_MINI]		= { .type = NLA_U32 },
	[ETHTOOL_A_RINGS_RX_JUMBO]		= { .type = NLA_U32 },
	[ETHTOOL_A_RINGS_TX]			= { .type = NLA_U32 },
	[ETHTOOL_A_RINGS_RX_BUF_LEN]            = NLA_POLICY_MIN(NLA_U32, 1),
	[ETHTOOL_A_RINGS_CQE_SIZE]		= NLA_POLICY_MIN(NLA_U32, 1),
};

int ethnl_set_rings(struct sk_buff *skb, struct genl_info *info)
{
	struct kernel_ethtool_ringparam kernel_ringparam = {};
	struct ethtool_ringparam ringparam = {};
	struct ethnl_req_info req_info = {};
	struct nlattr **tb = info->attrs;
	const struct nlattr *err_attr;
	const struct ethtool_ops *ops;
	struct net_device *dev;
	bool mod = false;
	int ret;

	ret = ethnl_parse_header_dev_get(&req_info,
					 tb[ETHTOOL_A_RINGS_HEADER],
					 genl_info_net(info), info->extack,
					 true);
	if (ret < 0)
		return ret;
	dev = req_info.dev;
	ops = dev->ethtool_ops;
	ret = -EOPNOTSUPP;
	if (!ops->get_ringparam || !ops->set_ringparam)
		goto out_dev;

	rtnl_lock();
	ret = ethnl_ops_begin(dev);
	if (ret < 0)
		goto out_rtnl;
	ops->get_ringparam(dev, &ringparam, &kernel_ringparam, info->extack);

	ethnl_update_u32(&ringparam.rx_pending, tb[ETHTOOL_A_RINGS_RX], &mod);
	ethnl_update_u32(&ringparam.rx_mini_pending,
			 tb[ETHTOOL_A_RINGS_RX_MINI], &mod);
	ethnl_update_u32(&ringparam.rx_jumbo_pending,
			 tb[ETHTOOL_A_RINGS_RX_JUMBO], &mod);
	ethnl_update_u32(&ringparam.tx_pending, tb[ETHTOOL_A_RINGS_TX], &mod);
	ethnl_update_u32(&kernel_ringparam.rx_buf_len,
			 tb[ETHTOOL_A_RINGS_RX_BUF_LEN], &mod);
	ethnl_update_u32(&kernel_ringparam.cqe_size,
			 tb[ETHTOOL_A_RINGS_CQE_SIZE], &mod);
	ret = 0;
	if (!mod)
		goto out_ops;

	/* ensure new ring parameters are within limits */
	if (ringparam.rx_pending > ringparam.rx_max_pending)
		err_attr = tb[ETHTOOL_A_RINGS_RX];
	else if (ringparam.rx_mini_pending > ringparam.rx_mini_max_pending)
		err_attr = tb[ETHTOOL_A_RINGS_RX_MINI];
	else if (ringparam.rx_jumbo_pending > ringparam.rx_jumbo_max_pending)
		err_attr = tb[ETHTOOL_A_RINGS_RX_JUMBO];
	else if (ringparam.tx_pending > ringparam.tx_max_pending)
		err_attr = tb[ETHTOOL_A_RINGS_TX];
	else
		err_attr = NULL;
	if (err_attr) {
		ret = -EINVAL;
		NL_SET_ERR_MSG_ATTR(info->extack, err_attr,
				    "requested ring size exceeds maximum");
		goto out_ops;
	}

	if (kernel_ringparam.rx_buf_len != 0 &&
	    !(ops->supported_ring_params & ETHTOOL_RING_USE_RX_BUF_LEN)) {
		ret = -EOPNOTSUPP;
		NL_SET_ERR_MSG_ATTR(info->extack,
				    tb[ETHTOOL_A_RINGS_RX_BUF_LEN],
				    "setting rx buf len not supported");
		goto out_ops;
	}

	if (kernel_ringparam.cqe_size &&
	    !(ops->supported_ring_params & ETHTOOL_RING_USE_CQE_SIZE)) {
		ret = -EOPNOTSUPP;
		NL_SET_ERR_MSG_ATTR(info->extack,
				    tb[ETHTOOL_A_RINGS_CQE_SIZE],
				    "setting cqe size not supported");
		goto out_ops;
	}

	ret = dev->ethtool_ops->set_ringparam(dev, &ringparam,
					      &kernel_ringparam, info->extack);
	if (ret < 0)
		goto out_ops;
	ethtool_notify(dev, ETHTOOL_MSG_RINGS_NTF, NULL);

out_ops:
	ethnl_ops_complete(dev);
out_rtnl:
	rtnl_unlock();
out_dev:
	ethnl_parse_header_dev_put(&req_info);
	return ret;
}
Commit	Line	Data
e4a1717b MK	1	// SPDX-License-Identifier: GPL-2.0-only
	2
	3	#include "netlink.h"
	4	#include "common.h"
	5
	6	struct rings_req_info {
	7	struct ethnl_req_info base;
	8	};
	9
	10	struct rings_reply_data {
	11	struct ethnl_reply_data base;
	12	struct ethtool_ringparam ringparam;
0b70c256	13	struct kernel_ethtool_ringparam kernel_ringparam;
e4a1717b MK	14	};
	15
	16	#define RINGS_REPDATA(__reply_base) \
	17	container_of(__reply_base, struct rings_reply_data, base)
	18
ff419afa	19	const struct nla_policy ethnl_rings_get_policy[] = {
329d9c33 JK	20	[ETHTOOL_A_RINGS_HEADER] =
329d9c33 JK	21	NLA_POLICY_NESTED(ethnl_header_policy),
e4a1717b MK	22	};
	23
	24	static int rings_prepare_data(const struct ethnl_req_info *req_base,
	25	struct ethnl_reply_data *reply_base,
	26	struct genl_info *info)
	27	{
	28	struct rings_reply_data *data = RINGS_REPDATA(reply_base);
74624944	29	struct netlink_ext_ack *extack = info ? info->extack : NULL;
e4a1717b MK	30	struct net_device *dev = reply_base->dev;
	31	int ret;
	32
	33	if (!dev->ethtool_ops->get_ringparam)
	34	return -EOPNOTSUPP;
	35	ret = ethnl_ops_begin(dev);
	36	if (ret < 0)
	37	return ret;
74624944 HC	38	dev->ethtool_ops->get_ringparam(dev, &data->ringparam,
74624944 HC	39	&data->kernel_ringparam, extack);
e4a1717b MK	40	ethnl_ops_complete(dev);
	41
	42	return 0;
	43	}
	44
	45	static int rings_reply_size(const struct ethnl_req_info *req_base,
	46	const struct ethnl_reply_data *reply_base)
	47	{
	48	return nla_total_size(sizeof(u32)) + /* _RINGS_RX_MAX */
	49	nla_total_size(sizeof(u32)) + /* _RINGS_RX_MINI_MAX */
	50	nla_total_size(sizeof(u32)) + /* _RINGS_RX_JUMBO_MAX */
	51	nla_total_size(sizeof(u32)) + /* _RINGS_TX_MAX */
	52	nla_total_size(sizeof(u32)) + /* _RINGS_RX */
	53	nla_total_size(sizeof(u32)) + /* _RINGS_RX_MINI */
	54	nla_total_size(sizeof(u32)) + /* _RINGS_RX_JUMBO */
0b70c256	55	nla_total_size(sizeof(u32)) + /* _RINGS_TX */
9690ae60	56	nla_total_size(sizeof(u32)) + /* _RINGS_RX_BUF_LEN */
1241e329 SS	57	nla_total_size(sizeof(u8)) + /* _RINGS_TCP_DATA_SPLIT */
1241e329 SS	58	nla_total_size(sizeof(u32)); /* _RINGS_CQE_SIZE */
e4a1717b MK	59	}
	60
	61	static int rings_fill_reply(struct sk_buff *skb,
	62	const struct ethnl_req_info *req_base,
	63	const struct ethnl_reply_data *reply_base)
	64	{
	65	const struct rings_reply_data *data = RINGS_REPDATA(reply_base);
9690ae60	66	const struct kernel_ethtool_ringparam *kr = &data->kernel_ringparam;
e4a1717b MK	67	const struct ethtool_ringparam *ringparam = &data->ringparam;
e4a1717b MK	68
9690ae60 JK	69	WARN_ON(kr->tcp_data_split > ETHTOOL_TCP_DATA_SPLIT_ENABLED);
9690ae60 JK	70
e4a1717b MK	71	if ((ringparam->rx_max_pending &&
	72	(nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MAX,
	73	ringparam->rx_max_pending) \|\|
	74	nla_put_u32(skb, ETHTOOL_A_RINGS_RX,
	75	ringparam->rx_pending))) \|\|
	76	(ringparam->rx_mini_max_pending &&
	77	(nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MINI_MAX,
	78	ringparam->rx_mini_max_pending) \|\|
	79	nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MINI,
	80	ringparam->rx_mini_pending))) \|\|
	81	(ringparam->rx_jumbo_max_pending &&
	82	(nla_put_u32(skb, ETHTOOL_A_RINGS_RX_JUMBO_MAX,
	83	ringparam->rx_jumbo_max_pending) \|\|
	84	nla_put_u32(skb, ETHTOOL_A_RINGS_RX_JUMBO,
	85	ringparam->rx_jumbo_pending))) \|\|
	86	(ringparam->tx_max_pending &&
	87	(nla_put_u32(skb, ETHTOOL_A_RINGS_TX_MAX,
	88	ringparam->tx_max_pending) \|\|
	89	nla_put_u32(skb, ETHTOOL_A_RINGS_TX,
0b70c256	90	ringparam->tx_pending))) \|\|
9690ae60 JK	91	(kr->rx_buf_len &&
	92	(nla_put_u32(skb, ETHTOOL_A_RINGS_RX_BUF_LEN, kr->rx_buf_len))) \|\|
	93	(kr->tcp_data_split &&
	94	(nla_put_u8(skb, ETHTOOL_A_RINGS_TCP_DATA_SPLIT,
1241e329 SS	95	kr->tcp_data_split))) \|\|
	96	(kr->cqe_size &&
	97	(nla_put_u32(skb, ETHTOOL_A_RINGS_CQE_SIZE, kr->cqe_size))))
e4a1717b MK	98	return -EMSGSIZE;
	99
	100	return 0;
	101	}
	102
	103	const struct ethnl_request_ops ethnl_rings_request_ops = {
	104	.request_cmd = ETHTOOL_MSG_RINGS_GET,
	105	.reply_cmd = ETHTOOL_MSG_RINGS_GET_REPLY,
	106	.hdr_attr = ETHTOOL_A_RINGS_HEADER,
e4a1717b MK	107	.req_info_size = sizeof(struct rings_req_info),
e4a1717b MK	108	.reply_data_size = sizeof(struct rings_reply_data),
e4a1717b MK	109
	110	.prepare_data = rings_prepare_data,
	111	.reply_size = rings_reply_size,
	112	.fill_reply = rings_fill_reply,
	113	};
2fc2929e MK	114
	115	/* RINGS_SET */
	116
ff419afa	117	const struct nla_policy ethnl_rings_set_policy[] = {
329d9c33 JK	118	[ETHTOOL_A_RINGS_HEADER] =
329d9c33 JK	119	NLA_POLICY_NESTED(ethnl_header_policy),
2fc2929e MK	120	[ETHTOOL_A_RINGS_RX] = { .type = NLA_U32 },
	121	[ETHTOOL_A_RINGS_RX_MINI] = { .type = NLA_U32 },
	122	[ETHTOOL_A_RINGS_RX_JUMBO] = { .type = NLA_U32 },
	123	[ETHTOOL_A_RINGS_TX] = { .type = NLA_U32 },
0b70c256	124	[ETHTOOL_A_RINGS_RX_BUF_LEN] = NLA_POLICY_MIN(NLA_U32, 1),
1241e329	125	[ETHTOOL_A_RINGS_CQE_SIZE] = NLA_POLICY_MIN(NLA_U32, 1),
2fc2929e MK	126	};
	127
	128	int ethnl_set_rings(struct sk_buff skb, struct genl_info info)
	129	{
0b70c256	130	struct kernel_ethtool_ringparam kernel_ringparam = {};
2fc2929e MK	131	struct ethtool_ringparam ringparam = {};
2fc2929e MK	132	struct ethnl_req_info req_info = {};
5028588b	133	struct nlattr **tb = info->attrs;
2fc2929e MK	134	const struct nlattr *err_attr;
	135	const struct ethtool_ops *ops;
	136	struct net_device *dev;
	137	bool mod = false;
	138	int ret;
	139
2fc2929e MK	140	ret = ethnl_parse_header_dev_get(&req_info,
	141	tb[ETHTOOL_A_RINGS_HEADER],
	142	genl_info_net(info), info->extack,
	143	true);
	144	if (ret < 0)
	145	return ret;
	146	dev = req_info.dev;
	147	ops = dev->ethtool_ops;
	148	ret = -EOPNOTSUPP;
	149	if (!ops->get_ringparam \|\| !ops->set_ringparam)
	150	goto out_dev;
	151
	152	rtnl_lock();
	153	ret = ethnl_ops_begin(dev);
	154	if (ret < 0)
	155	goto out_rtnl;
74624944	156	ops->get_ringparam(dev, &ringparam, &kernel_ringparam, info->extack);
2fc2929e MK	157
	158	ethnl_update_u32(&ringparam.rx_pending, tb[ETHTOOL_A_RINGS_RX], &mod);
	159	ethnl_update_u32(&ringparam.rx_mini_pending,
	160	tb[ETHTOOL_A_RINGS_RX_MINI], &mod);
	161	ethnl_update_u32(&ringparam.rx_jumbo_pending,
	162	tb[ETHTOOL_A_RINGS_RX_JUMBO], &mod);
	163	ethnl_update_u32(&ringparam.tx_pending, tb[ETHTOOL_A_RINGS_TX], &mod);
0b70c256 HC	164	ethnl_update_u32(&kernel_ringparam.rx_buf_len,
0b70c256 HC	165	tb[ETHTOOL_A_RINGS_RX_BUF_LEN], &mod);
1241e329 SS	166	ethnl_update_u32(&kernel_ringparam.cqe_size,
1241e329 SS	167	tb[ETHTOOL_A_RINGS_CQE_SIZE], &mod);
2fc2929e MK	168	ret = 0;
	169	if (!mod)
	170	goto out_ops;
	171
	172	/* ensure new ring parameters are within limits */
	173	if (ringparam.rx_pending > ringparam.rx_max_pending)
	174	err_attr = tb[ETHTOOL_A_RINGS_RX];
	175	else if (ringparam.rx_mini_pending > ringparam.rx_mini_max_pending)
	176	err_attr = tb[ETHTOOL_A_RINGS_RX_MINI];
	177	else if (ringparam.rx_jumbo_pending > ringparam.rx_jumbo_max_pending)
	178	err_attr = tb[ETHTOOL_A_RINGS_RX_JUMBO];
	179	else if (ringparam.tx_pending > ringparam.tx_max_pending)
	180	err_attr = tb[ETHTOOL_A_RINGS_TX];
	181	else
	182	err_attr = NULL;
	183	if (err_attr) {
	184	ret = -EINVAL;
	185	NL_SET_ERR_MSG_ATTR(info->extack, err_attr,
5ec82c49	186	"requested ring size exceeds maximum");
2fc2929e MK	187	goto out_ops;
	188	}
	189
0b70c256 HC	190	if (kernel_ringparam.rx_buf_len != 0 &&
	191	!(ops->supported_ring_params & ETHTOOL_RING_USE_RX_BUF_LEN)) {
	192	ret = -EOPNOTSUPP;
	193	NL_SET_ERR_MSG_ATTR(info->extack,
	194	tb[ETHTOOL_A_RINGS_RX_BUF_LEN],
	195	"setting rx buf len not supported");
	196	goto out_ops;
	197	}
	198
1241e329 SS	199	if (kernel_ringparam.cqe_size &&
	200	!(ops->supported_ring_params & ETHTOOL_RING_USE_CQE_SIZE)) {
	201	ret = -EOPNOTSUPP;
	202	NL_SET_ERR_MSG_ATTR(info->extack,
	203	tb[ETHTOOL_A_RINGS_CQE_SIZE],
	204	"setting cqe size not supported");
	205	goto out_ops;
	206	}
	207
74624944 HC	208	ret = dev->ethtool_ops->set_ringparam(dev, &ringparam,
74624944 HC	209	&kernel_ringparam, info->extack);
bc9d1c99 MK	210	if (ret < 0)
	211	goto out_ops;
	212	ethtool_notify(dev, ETHTOOL_MSG_RINGS_NTF, NULL);
2fc2929e MK	213
	214	out_ops:
	215	ethnl_ops_complete(dev);
	216	out_rtnl:
	217	rtnl_unlock();
	218	out_dev:
34ac17ec	219	ethnl_parse_header_dev_put(&req_info);
2fc2929e MK	220	return ret;
2fc2929e MK	221	}