[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;
	u32				supported_ring_params;
};

#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;

	data->supported_ring_params = dev->ethtool_ops->supported_ring_params;
	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 */
	       nla_total_size(sizeof(u8))  +	/* _RINGS_TX_PUSH */
	       nla_total_size(sizeof(u8))) +	/* _RINGS_RX_PUSH */
	       nla_total_size(sizeof(u32)) +	/* _RINGS_TX_PUSH_BUF_LEN */
	       nla_total_size(sizeof(u32));	/* _RINGS_TX_PUSH_BUF_LEN_MAX */
}

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;
	u32 supported_ring_params = data->supported_ring_params;

	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))) ||
	    nla_put_u8(skb, ETHTOOL_A_RINGS_TX_PUSH, !!kr->tx_push) ||
	    nla_put_u8(skb, ETHTOOL_A_RINGS_RX_PUSH, !!kr->rx_push) ||
	    ((supported_ring_params & ETHTOOL_RING_USE_TX_PUSH_BUF_LEN) &&
	     (nla_put_u32(skb, ETHTOOL_A_RINGS_TX_PUSH_BUF_LEN_MAX,
			  kr->tx_push_buf_max_len) ||
	      nla_put_u32(skb, ETHTOOL_A_RINGS_TX_PUSH_BUF_LEN,
			  kr->tx_push_buf_len))))
		return -EMSGSIZE;

	return 0;
}

/* 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),
	[ETHTOOL_A_RINGS_TX_PUSH]		= NLA_POLICY_MAX(NLA_U8, 1),
	[ETHTOOL_A_RINGS_RX_PUSH]		= NLA_POLICY_MAX(NLA_U8, 1),
	[ETHTOOL_A_RINGS_TX_PUSH_BUF_LEN]	= { .type = NLA_U32 },
};

static int
ethnl_set_rings_validate(struct ethnl_req_info *req_info,
			 struct genl_info *info)
{
	const struct ethtool_ops *ops = req_info->dev->ethtool_ops;
	struct nlattr **tb = info->attrs;

	if (tb[ETHTOOL_A_RINGS_RX_BUF_LEN] &&
	    !(ops->supported_ring_params & ETHTOOL_RING_USE_RX_BUF_LEN)) {
		NL_SET_ERR_MSG_ATTR(info->extack,
				    tb[ETHTOOL_A_RINGS_RX_BUF_LEN],
				    "setting rx buf len not supported");
		return -EOPNOTSUPP;
	}

	if (tb[ETHTOOL_A_RINGS_CQE_SIZE] &&
	    !(ops->supported_ring_params & ETHTOOL_RING_USE_CQE_SIZE)) {
		NL_SET_ERR_MSG_ATTR(info->extack,
				    tb[ETHTOOL_A_RINGS_CQE_SIZE],
				    "setting cqe size not supported");
		return -EOPNOTSUPP;
	}

	if (tb[ETHTOOL_A_RINGS_TX_PUSH] &&
	    !(ops->supported_ring_params & ETHTOOL_RING_USE_TX_PUSH)) {
		NL_SET_ERR_MSG_ATTR(info->extack,
				    tb[ETHTOOL_A_RINGS_TX_PUSH],
				    "setting tx push not supported");
		return -EOPNOTSUPP;
	}

	if (tb[ETHTOOL_A_RINGS_RX_PUSH] &&
	    !(ops->supported_ring_params & ETHTOOL_RING_USE_RX_PUSH)) {
		NL_SET_ERR_MSG_ATTR(info->extack,
				    tb[ETHTOOL_A_RINGS_RX_PUSH],
				    "setting rx push not supported");
		return -EOPNOTSUPP;
	}

	if (tb[ETHTOOL_A_RINGS_TX_PUSH_BUF_LEN] &&
	    !(ops->supported_ring_params & ETHTOOL_RING_USE_TX_PUSH_BUF_LEN)) {
		NL_SET_ERR_MSG_ATTR(info->extack,
				    tb[ETHTOOL_A_RINGS_TX_PUSH_BUF_LEN],
				    "setting tx push buf len is not supported");
		return -EOPNOTSUPP;
	}

	return ops->get_ringparam && ops->set_ringparam ? 1 : -EOPNOTSUPP;
}

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

	dev->ethtool_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);
	ethnl_update_u8(&kernel_ringparam.tx_push,
			tb[ETHTOOL_A_RINGS_TX_PUSH], &mod);
	ethnl_update_u8(&kernel_ringparam.rx_push,
			tb[ETHTOOL_A_RINGS_RX_PUSH], &mod);
	ethnl_update_u32(&kernel_ringparam.tx_push_buf_len,
			 tb[ETHTOOL_A_RINGS_TX_PUSH_BUF_LEN], &mod);
	if (!mod)
		return 0;

	/* 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) {
		NL_SET_ERR_MSG_ATTR(info->extack, err_attr,
				    "requested ring size exceeds maximum");
		return -EINVAL;
	}

	if (kernel_ringparam.tx_push_buf_len > kernel_ringparam.tx_push_buf_max_len) {
		NL_SET_ERR_MSG_ATTR_FMT(info->extack, tb[ETHTOOL_A_RINGS_TX_PUSH_BUF_LEN],
					"Requested TX push buffer exceeds the maximum of %u",
					kernel_ringparam.tx_push_buf_max_len);

		return -EINVAL;
	}

	ret = dev->ethtool_ops->set_ringparam(dev, &ringparam,
					      &kernel_ringparam, info->extack);
	return ret < 0 ? ret : 1;
}

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,

	.set_validate		= ethnl_set_rings_validate,
	.set			= ethnl_set_rings,
	.set_ntf_cmd		= ETHTOOL_MSG_RINGS_NTF,
};
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;
233eb4e7	14	u32 supported_ring_params;
e4a1717b MK	15	};
	16
	17	#define RINGS_REPDATA(__reply_base) \
	18	container_of(__reply_base, struct rings_reply_data, base)
	19
ff419afa	20	const struct nla_policy ethnl_rings_get_policy[] = {
329d9c33 JK	21	[ETHTOOL_A_RINGS_HEADER] =
329d9c33 JK	22	NLA_POLICY_NESTED(ethnl_header_policy),
e4a1717b MK	23	};
	24
	25	static int rings_prepare_data(const struct ethnl_req_info *req_base,
	26	struct ethnl_reply_data *reply_base,
	27	struct genl_info *info)
	28	{
	29	struct rings_reply_data *data = RINGS_REPDATA(reply_base);
74624944	30	struct netlink_ext_ack *extack = info ? info->extack : NULL;
e4a1717b MK	31	struct net_device *dev = reply_base->dev;
	32	int ret;
	33
	34	if (!dev->ethtool_ops->get_ringparam)
	35	return -EOPNOTSUPP;
233eb4e7 SA	36
233eb4e7 SA	37	data->supported_ring_params = dev->ethtool_ops->supported_ring_params;
e4a1717b MK	38	ret = ethnl_ops_begin(dev);
	39	if (ret < 0)
	40	return ret;
74624944 HC	41	dev->ethtool_ops->get_ringparam(dev, &data->ringparam,
74624944 HC	42	&data->kernel_ringparam, extack);
e4a1717b MK	43	ethnl_ops_complete(dev);
	44
	45	return 0;
	46	}
	47
	48	static int rings_reply_size(const struct ethnl_req_info *req_base,
	49	const struct ethnl_reply_data *reply_base)
	50	{
	51	return nla_total_size(sizeof(u32)) + /* _RINGS_RX_MAX */
	52	nla_total_size(sizeof(u32)) + /* _RINGS_RX_MINI_MAX */
	53	nla_total_size(sizeof(u32)) + /* _RINGS_RX_JUMBO_MAX */
	54	nla_total_size(sizeof(u32)) + /* _RINGS_TX_MAX */
	55	nla_total_size(sizeof(u32)) + /* _RINGS_RX */
	56	nla_total_size(sizeof(u32)) + /* _RINGS_RX_MINI */
	57	nla_total_size(sizeof(u32)) + /* _RINGS_RX_JUMBO */
0b70c256	58	nla_total_size(sizeof(u32)) + /* _RINGS_TX */
9690ae60	59	nla_total_size(sizeof(u32)) + /* _RINGS_RX_BUF_LEN */
1241e329	60	nla_total_size(sizeof(u8)) + /* _RINGS_TCP_DATA_SPLIT */
4dc84c06	61	nla_total_size(sizeof(u32) + /* _RINGS_CQE_SIZE */
5b4e9a7a	62	nla_total_size(sizeof(u8)) + /* _RINGS_TX_PUSH */
233eb4e7 SA	63	nla_total_size(sizeof(u8))) + /* _RINGS_RX_PUSH */
	64	nla_total_size(sizeof(u32)) + /* _RINGS_TX_PUSH_BUF_LEN */
	65	nla_total_size(sizeof(u32)); /* _RINGS_TX_PUSH_BUF_LEN_MAX */
e4a1717b MK	66	}
	67
	68	static int rings_fill_reply(struct sk_buff *skb,
	69	const struct ethnl_req_info *req_base,
	70	const struct ethnl_reply_data *reply_base)
	71	{
	72	const struct rings_reply_data *data = RINGS_REPDATA(reply_base);
9690ae60	73	const struct kernel_ethtool_ringparam *kr = &data->kernel_ringparam;
e4a1717b	74	const struct ethtool_ringparam *ringparam = &data->ringparam;
233eb4e7	75	u32 supported_ring_params = data->supported_ring_params;
e4a1717b	76
9690ae60 JK	77	WARN_ON(kr->tcp_data_split > ETHTOOL_TCP_DATA_SPLIT_ENABLED);
9690ae60 JK	78
e4a1717b MK	79	if ((ringparam->rx_max_pending &&
	80	(nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MAX,
	81	ringparam->rx_max_pending) \|\|
	82	nla_put_u32(skb, ETHTOOL_A_RINGS_RX,
	83	ringparam->rx_pending))) \|\|
	84	(ringparam->rx_mini_max_pending &&
	85	(nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MINI_MAX,
	86	ringparam->rx_mini_max_pending) \|\|
	87	nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MINI,
	88	ringparam->rx_mini_pending))) \|\|
	89	(ringparam->rx_jumbo_max_pending &&
	90	(nla_put_u32(skb, ETHTOOL_A_RINGS_RX_JUMBO_MAX,
	91	ringparam->rx_jumbo_max_pending) \|\|
	92	nla_put_u32(skb, ETHTOOL_A_RINGS_RX_JUMBO,
	93	ringparam->rx_jumbo_pending))) \|\|
	94	(ringparam->tx_max_pending &&
	95	(nla_put_u32(skb, ETHTOOL_A_RINGS_TX_MAX,
	96	ringparam->tx_max_pending) \|\|
	97	nla_put_u32(skb, ETHTOOL_A_RINGS_TX,
0b70c256	98	ringparam->tx_pending))) \|\|
9690ae60 JK	99	(kr->rx_buf_len &&
	100	(nla_put_u32(skb, ETHTOOL_A_RINGS_RX_BUF_LEN, kr->rx_buf_len))) \|\|
	101	(kr->tcp_data_split &&
	102	(nla_put_u8(skb, ETHTOOL_A_RINGS_TCP_DATA_SPLIT,
1241e329 SS	103	kr->tcp_data_split))) \|\|
1241e329 SS	104	(kr->cqe_size &&
4dc84c06	105	(nla_put_u32(skb, ETHTOOL_A_RINGS_CQE_SIZE, kr->cqe_size))) \|\|
5b4e9a7a	106	nla_put_u8(skb, ETHTOOL_A_RINGS_TX_PUSH, !!kr->tx_push) \|\|
233eb4e7 SA	107	nla_put_u8(skb, ETHTOOL_A_RINGS_RX_PUSH, !!kr->rx_push) \|\|
	108	((supported_ring_params & ETHTOOL_RING_USE_TX_PUSH_BUF_LEN) &&
	109	(nla_put_u32(skb, ETHTOOL_A_RINGS_TX_PUSH_BUF_LEN_MAX,
	110	kr->tx_push_buf_max_len) \|\|
	111	nla_put_u32(skb, ETHTOOL_A_RINGS_TX_PUSH_BUF_LEN,
	112	kr->tx_push_buf_len))))
e4a1717b MK	113	return -EMSGSIZE;
	114
	115	return 0;
	116	}
	117
2fc2929e MK	118	/* RINGS_SET */
2fc2929e MK	119
ff419afa	120	const struct nla_policy ethnl_rings_set_policy[] = {
329d9c33 JK	121	[ETHTOOL_A_RINGS_HEADER] =
329d9c33 JK	122	NLA_POLICY_NESTED(ethnl_header_policy),
2fc2929e MK	123	[ETHTOOL_A_RINGS_RX] = { .type = NLA_U32 },
	124	[ETHTOOL_A_RINGS_RX_MINI] = { .type = NLA_U32 },
	125	[ETHTOOL_A_RINGS_RX_JUMBO] = { .type = NLA_U32 },
	126	[ETHTOOL_A_RINGS_TX] = { .type = NLA_U32 },
0b70c256	127	[ETHTOOL_A_RINGS_RX_BUF_LEN] = NLA_POLICY_MIN(NLA_U32, 1),
1241e329	128	[ETHTOOL_A_RINGS_CQE_SIZE] = NLA_POLICY_MIN(NLA_U32, 1),
4dc84c06	129	[ETHTOOL_A_RINGS_TX_PUSH] = NLA_POLICY_MAX(NLA_U8, 1),
5b4e9a7a	130	[ETHTOOL_A_RINGS_RX_PUSH] = NLA_POLICY_MAX(NLA_U8, 1),
233eb4e7	131	[ETHTOOL_A_RINGS_TX_PUSH_BUF_LEN] = { .type = NLA_U32 },
2fc2929e MK	132	};
2fc2929e MK	133
04007961 JK	134	static int
	135	ethnl_set_rings_validate(struct ethnl_req_info *req_info,
	136	struct genl_info *info)
2fc2929e	137	{
04007961	138	const struct ethtool_ops *ops = req_info->dev->ethtool_ops;
5028588b	139	struct nlattr **tb = info->attrs;
2fc2929e	140
bde292c0 JW	141	if (tb[ETHTOOL_A_RINGS_RX_BUF_LEN] &&
bde292c0 JW	142	!(ops->supported_ring_params & ETHTOOL_RING_USE_RX_BUF_LEN)) {
bde292c0 JW	143	NL_SET_ERR_MSG_ATTR(info->extack,
	144	tb[ETHTOOL_A_RINGS_RX_BUF_LEN],
	145	"setting rx buf len not supported");
04007961	146	return -EOPNOTSUPP;
bde292c0 JW	147	}
	148
	149	if (tb[ETHTOOL_A_RINGS_CQE_SIZE] &&
	150	!(ops->supported_ring_params & ETHTOOL_RING_USE_CQE_SIZE)) {
bde292c0 JW	151	NL_SET_ERR_MSG_ATTR(info->extack,
	152	tb[ETHTOOL_A_RINGS_CQE_SIZE],
	153	"setting cqe size not supported");
04007961	154	return -EOPNOTSUPP;
bde292c0 JW	155	}
bde292c0 JW	156
4dc84c06 JW	157	if (tb[ETHTOOL_A_RINGS_TX_PUSH] &&
4dc84c06 JW	158	!(ops->supported_ring_params & ETHTOOL_RING_USE_TX_PUSH)) {
4dc84c06 JW	159	NL_SET_ERR_MSG_ATTR(info->extack,
	160	tb[ETHTOOL_A_RINGS_TX_PUSH],
	161	"setting tx push not supported");
04007961	162	return -EOPNOTSUPP;
4dc84c06 JW	163	}
4dc84c06 JW	164
5b4e9a7a SN	165	if (tb[ETHTOOL_A_RINGS_RX_PUSH] &&
	166	!(ops->supported_ring_params & ETHTOOL_RING_USE_RX_PUSH)) {
	167	NL_SET_ERR_MSG_ATTR(info->extack,
	168	tb[ETHTOOL_A_RINGS_RX_PUSH],
	169	"setting rx push not supported");
	170	return -EOPNOTSUPP;
	171	}
	172
233eb4e7 SA	173	if (tb[ETHTOOL_A_RINGS_TX_PUSH_BUF_LEN] &&
	174	!(ops->supported_ring_params & ETHTOOL_RING_USE_TX_PUSH_BUF_LEN)) {
	175	NL_SET_ERR_MSG_ATTR(info->extack,
	176	tb[ETHTOOL_A_RINGS_TX_PUSH_BUF_LEN],
	177	"setting tx push buf len is not supported");
	178	return -EOPNOTSUPP;
	179	}
	180
04007961 JK	181	return ops->get_ringparam && ops->set_ringparam ? 1 : -EOPNOTSUPP;
	182	}
	183
	184	static int
	185	ethnl_set_rings(struct ethnl_req_info req_info, struct genl_info info)
	186	{
	187	struct kernel_ethtool_ringparam kernel_ringparam = {};
	188	struct ethtool_ringparam ringparam = {};
	189	struct net_device *dev = req_info->dev;
	190	struct nlattr **tb = info->attrs;
	191	const struct nlattr *err_attr;
	192	bool mod = false;
	193	int ret;
	194
	195	dev->ethtool_ops->get_ringparam(dev, &ringparam,
	196	&kernel_ringparam, info->extack);
2fc2929e MK	197
	198	ethnl_update_u32(&ringparam.rx_pending, tb[ETHTOOL_A_RINGS_RX], &mod);
	199	ethnl_update_u32(&ringparam.rx_mini_pending,
	200	tb[ETHTOOL_A_RINGS_RX_MINI], &mod);
	201	ethnl_update_u32(&ringparam.rx_jumbo_pending,
	202	tb[ETHTOOL_A_RINGS_RX_JUMBO], &mod);
	203	ethnl_update_u32(&ringparam.tx_pending, tb[ETHTOOL_A_RINGS_TX], &mod);
0b70c256 HC	204	ethnl_update_u32(&kernel_ringparam.rx_buf_len,
0b70c256 HC	205	tb[ETHTOOL_A_RINGS_RX_BUF_LEN], &mod);
1241e329 SS	206	ethnl_update_u32(&kernel_ringparam.cqe_size,
1241e329 SS	207	tb[ETHTOOL_A_RINGS_CQE_SIZE], &mod);
4dc84c06 JW	208	ethnl_update_u8(&kernel_ringparam.tx_push,
4dc84c06 JW	209	tb[ETHTOOL_A_RINGS_TX_PUSH], &mod);
5b4e9a7a SN	210	ethnl_update_u8(&kernel_ringparam.rx_push,
5b4e9a7a SN	211	tb[ETHTOOL_A_RINGS_RX_PUSH], &mod);
233eb4e7 SA	212	ethnl_update_u32(&kernel_ringparam.tx_push_buf_len,
233eb4e7 SA	213	tb[ETHTOOL_A_RINGS_TX_PUSH_BUF_LEN], &mod);
2fc2929e	214	if (!mod)
04007961	215	return 0;
2fc2929e MK	216
	217	/* ensure new ring parameters are within limits */
	218	if (ringparam.rx_pending > ringparam.rx_max_pending)
	219	err_attr = tb[ETHTOOL_A_RINGS_RX];
	220	else if (ringparam.rx_mini_pending > ringparam.rx_mini_max_pending)
	221	err_attr = tb[ETHTOOL_A_RINGS_RX_MINI];
	222	else if (ringparam.rx_jumbo_pending > ringparam.rx_jumbo_max_pending)
	223	err_attr = tb[ETHTOOL_A_RINGS_RX_JUMBO];
	224	else if (ringparam.tx_pending > ringparam.tx_max_pending)
	225	err_attr = tb[ETHTOOL_A_RINGS_TX];
	226	else
	227	err_attr = NULL;
	228	if (err_attr) {
2fc2929e	229	NL_SET_ERR_MSG_ATTR(info->extack, err_attr,
5ec82c49	230	"requested ring size exceeds maximum");
04007961	231	return -EINVAL;
2fc2929e MK	232	}
2fc2929e MK	233
233eb4e7 SA	234	if (kernel_ringparam.tx_push_buf_len > kernel_ringparam.tx_push_buf_max_len) {
	235	NL_SET_ERR_MSG_ATTR_FMT(info->extack, tb[ETHTOOL_A_RINGS_TX_PUSH_BUF_LEN],
	236	"Requested TX push buffer exceeds the maximum of %u",
	237	kernel_ringparam.tx_push_buf_max_len);
	238
	239	return -EINVAL;
	240	}
	241
74624944 HC	242	ret = dev->ethtool_ops->set_ringparam(dev, &ringparam,
74624944 HC	243	&kernel_ringparam, info->extack);
04007961	244	return ret < 0 ? ret : 1;
2fc2929e	245	}
04007961 JK	246
	247	const struct ethnl_request_ops ethnl_rings_request_ops = {
	248	.request_cmd = ETHTOOL_MSG_RINGS_GET,
	249	.reply_cmd = ETHTOOL_MSG_RINGS_GET_REPLY,
	250	.hdr_attr = ETHTOOL_A_RINGS_HEADER,
	251	.req_info_size = sizeof(struct rings_req_info),
	252	.reply_data_size = sizeof(struct rings_reply_data),
	253
	254	.prepare_data = rings_prepare_data,
	255	.reply_size = rings_reply_size,
	256	.fill_reply = rings_fill_reply,
	257
	258	.set_validate = ethnl_set_rings_validate,
	259	.set = ethnl_set_rings,
	260	.set_ntf_cmd = ETHTOOL_MSG_RINGS_NTF,
	261	};