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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; | |
13 | }; | |
14 | ||
15 | #define RINGS_REPDATA(__reply_base) \ | |
16 | container_of(__reply_base, struct rings_reply_data, base) | |
17 | ||
ff419afa | 18 | const struct nla_policy ethnl_rings_get_policy[] = { |
329d9c33 JK |
19 | [ETHTOOL_A_RINGS_HEADER] = |
20 | NLA_POLICY_NESTED(ethnl_header_policy), | |
e4a1717b MK |
21 | }; |
22 | ||
23 | static int rings_prepare_data(const struct ethnl_req_info *req_base, | |
24 | struct ethnl_reply_data *reply_base, | |
25 | struct genl_info *info) | |
26 | { | |
27 | struct rings_reply_data *data = RINGS_REPDATA(reply_base); | |
28 | struct net_device *dev = reply_base->dev; | |
29 | int ret; | |
30 | ||
31 | if (!dev->ethtool_ops->get_ringparam) | |
32 | return -EOPNOTSUPP; | |
33 | ret = ethnl_ops_begin(dev); | |
34 | if (ret < 0) | |
35 | return ret; | |
36 | dev->ethtool_ops->get_ringparam(dev, &data->ringparam); | |
37 | ethnl_ops_complete(dev); | |
38 | ||
39 | return 0; | |
40 | } | |
41 | ||
42 | static int rings_reply_size(const struct ethnl_req_info *req_base, | |
43 | const struct ethnl_reply_data *reply_base) | |
44 | { | |
45 | return nla_total_size(sizeof(u32)) + /* _RINGS_RX_MAX */ | |
46 | nla_total_size(sizeof(u32)) + /* _RINGS_RX_MINI_MAX */ | |
47 | nla_total_size(sizeof(u32)) + /* _RINGS_RX_JUMBO_MAX */ | |
48 | nla_total_size(sizeof(u32)) + /* _RINGS_TX_MAX */ | |
49 | nla_total_size(sizeof(u32)) + /* _RINGS_RX */ | |
50 | nla_total_size(sizeof(u32)) + /* _RINGS_RX_MINI */ | |
51 | nla_total_size(sizeof(u32)) + /* _RINGS_RX_JUMBO */ | |
52 | nla_total_size(sizeof(u32)); /* _RINGS_TX */ | |
53 | } | |
54 | ||
55 | static int rings_fill_reply(struct sk_buff *skb, | |
56 | const struct ethnl_req_info *req_base, | |
57 | const struct ethnl_reply_data *reply_base) | |
58 | { | |
59 | const struct rings_reply_data *data = RINGS_REPDATA(reply_base); | |
60 | const struct ethtool_ringparam *ringparam = &data->ringparam; | |
61 | ||
62 | if ((ringparam->rx_max_pending && | |
63 | (nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MAX, | |
64 | ringparam->rx_max_pending) || | |
65 | nla_put_u32(skb, ETHTOOL_A_RINGS_RX, | |
66 | ringparam->rx_pending))) || | |
67 | (ringparam->rx_mini_max_pending && | |
68 | (nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MINI_MAX, | |
69 | ringparam->rx_mini_max_pending) || | |
70 | nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MINI, | |
71 | ringparam->rx_mini_pending))) || | |
72 | (ringparam->rx_jumbo_max_pending && | |
73 | (nla_put_u32(skb, ETHTOOL_A_RINGS_RX_JUMBO_MAX, | |
74 | ringparam->rx_jumbo_max_pending) || | |
75 | nla_put_u32(skb, ETHTOOL_A_RINGS_RX_JUMBO, | |
76 | ringparam->rx_jumbo_pending))) || | |
77 | (ringparam->tx_max_pending && | |
78 | (nla_put_u32(skb, ETHTOOL_A_RINGS_TX_MAX, | |
79 | ringparam->tx_max_pending) || | |
80 | nla_put_u32(skb, ETHTOOL_A_RINGS_TX, | |
81 | ringparam->tx_pending)))) | |
82 | return -EMSGSIZE; | |
83 | ||
84 | return 0; | |
85 | } | |
86 | ||
87 | const struct ethnl_request_ops ethnl_rings_request_ops = { | |
88 | .request_cmd = ETHTOOL_MSG_RINGS_GET, | |
89 | .reply_cmd = ETHTOOL_MSG_RINGS_GET_REPLY, | |
90 | .hdr_attr = ETHTOOL_A_RINGS_HEADER, | |
e4a1717b MK |
91 | .req_info_size = sizeof(struct rings_req_info), |
92 | .reply_data_size = sizeof(struct rings_reply_data), | |
e4a1717b MK |
93 | |
94 | .prepare_data = rings_prepare_data, | |
95 | .reply_size = rings_reply_size, | |
96 | .fill_reply = rings_fill_reply, | |
97 | }; | |
2fc2929e MK |
98 | |
99 | /* RINGS_SET */ | |
100 | ||
ff419afa | 101 | const struct nla_policy ethnl_rings_set_policy[] = { |
329d9c33 JK |
102 | [ETHTOOL_A_RINGS_HEADER] = |
103 | NLA_POLICY_NESTED(ethnl_header_policy), | |
2fc2929e MK |
104 | [ETHTOOL_A_RINGS_RX] = { .type = NLA_U32 }, |
105 | [ETHTOOL_A_RINGS_RX_MINI] = { .type = NLA_U32 }, | |
106 | [ETHTOOL_A_RINGS_RX_JUMBO] = { .type = NLA_U32 }, | |
107 | [ETHTOOL_A_RINGS_TX] = { .type = NLA_U32 }, | |
108 | }; | |
109 | ||
110 | int ethnl_set_rings(struct sk_buff *skb, struct genl_info *info) | |
111 | { | |
2fc2929e MK |
112 | struct ethtool_ringparam ringparam = {}; |
113 | struct ethnl_req_info req_info = {}; | |
5028588b | 114 | struct nlattr **tb = info->attrs; |
2fc2929e MK |
115 | const struct nlattr *err_attr; |
116 | const struct ethtool_ops *ops; | |
117 | struct net_device *dev; | |
118 | bool mod = false; | |
119 | int ret; | |
120 | ||
2fc2929e MK |
121 | ret = ethnl_parse_header_dev_get(&req_info, |
122 | tb[ETHTOOL_A_RINGS_HEADER], | |
123 | genl_info_net(info), info->extack, | |
124 | true); | |
125 | if (ret < 0) | |
126 | return ret; | |
127 | dev = req_info.dev; | |
128 | ops = dev->ethtool_ops; | |
129 | ret = -EOPNOTSUPP; | |
130 | if (!ops->get_ringparam || !ops->set_ringparam) | |
131 | goto out_dev; | |
132 | ||
133 | rtnl_lock(); | |
134 | ret = ethnl_ops_begin(dev); | |
135 | if (ret < 0) | |
136 | goto out_rtnl; | |
137 | ops->get_ringparam(dev, &ringparam); | |
138 | ||
139 | ethnl_update_u32(&ringparam.rx_pending, tb[ETHTOOL_A_RINGS_RX], &mod); | |
140 | ethnl_update_u32(&ringparam.rx_mini_pending, | |
141 | tb[ETHTOOL_A_RINGS_RX_MINI], &mod); | |
142 | ethnl_update_u32(&ringparam.rx_jumbo_pending, | |
143 | tb[ETHTOOL_A_RINGS_RX_JUMBO], &mod); | |
144 | ethnl_update_u32(&ringparam.tx_pending, tb[ETHTOOL_A_RINGS_TX], &mod); | |
145 | ret = 0; | |
146 | if (!mod) | |
147 | goto out_ops; | |
148 | ||
149 | /* ensure new ring parameters are within limits */ | |
150 | if (ringparam.rx_pending > ringparam.rx_max_pending) | |
151 | err_attr = tb[ETHTOOL_A_RINGS_RX]; | |
152 | else if (ringparam.rx_mini_pending > ringparam.rx_mini_max_pending) | |
153 | err_attr = tb[ETHTOOL_A_RINGS_RX_MINI]; | |
154 | else if (ringparam.rx_jumbo_pending > ringparam.rx_jumbo_max_pending) | |
155 | err_attr = tb[ETHTOOL_A_RINGS_RX_JUMBO]; | |
156 | else if (ringparam.tx_pending > ringparam.tx_max_pending) | |
157 | err_attr = tb[ETHTOOL_A_RINGS_TX]; | |
158 | else | |
159 | err_attr = NULL; | |
160 | if (err_attr) { | |
161 | ret = -EINVAL; | |
162 | NL_SET_ERR_MSG_ATTR(info->extack, err_attr, | |
5ec82c49 | 163 | "requested ring size exceeds maximum"); |
2fc2929e MK |
164 | goto out_ops; |
165 | } | |
166 | ||
167 | ret = dev->ethtool_ops->set_ringparam(dev, &ringparam); | |
bc9d1c99 MK |
168 | if (ret < 0) |
169 | goto out_ops; | |
170 | ethtool_notify(dev, ETHTOOL_MSG_RINGS_NTF, NULL); | |
2fc2929e MK |
171 | |
172 | out_ops: | |
173 | ethnl_ops_complete(dev); | |
174 | out_rtnl: | |
175 | rtnl_unlock(); | |
176 | out_dev: | |
177 | dev_put(dev); | |
178 | return ret; | |
179 | } |