]>
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] = |
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, |
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 | 57 | nla_total_size(sizeof(u8)) + /* _RINGS_TCP_DATA_SPLIT */ |
4dc84c06 JW |
58 | nla_total_size(sizeof(u32) + /* _RINGS_CQE_SIZE */ |
59 | nla_total_size(sizeof(u8))); /* _RINGS_TX_PUSH */ | |
e4a1717b MK |
60 | } |
61 | ||
62 | static int rings_fill_reply(struct sk_buff *skb, | |
63 | const struct ethnl_req_info *req_base, | |
64 | const struct ethnl_reply_data *reply_base) | |
65 | { | |
66 | const struct rings_reply_data *data = RINGS_REPDATA(reply_base); | |
9690ae60 | 67 | const struct kernel_ethtool_ringparam *kr = &data->kernel_ringparam; |
e4a1717b MK |
68 | const struct ethtool_ringparam *ringparam = &data->ringparam; |
69 | ||
9690ae60 JK |
70 | WARN_ON(kr->tcp_data_split > ETHTOOL_TCP_DATA_SPLIT_ENABLED); |
71 | ||
e4a1717b MK |
72 | if ((ringparam->rx_max_pending && |
73 | (nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MAX, | |
74 | ringparam->rx_max_pending) || | |
75 | nla_put_u32(skb, ETHTOOL_A_RINGS_RX, | |
76 | ringparam->rx_pending))) || | |
77 | (ringparam->rx_mini_max_pending && | |
78 | (nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MINI_MAX, | |
79 | ringparam->rx_mini_max_pending) || | |
80 | nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MINI, | |
81 | ringparam->rx_mini_pending))) || | |
82 | (ringparam->rx_jumbo_max_pending && | |
83 | (nla_put_u32(skb, ETHTOOL_A_RINGS_RX_JUMBO_MAX, | |
84 | ringparam->rx_jumbo_max_pending) || | |
85 | nla_put_u32(skb, ETHTOOL_A_RINGS_RX_JUMBO, | |
86 | ringparam->rx_jumbo_pending))) || | |
87 | (ringparam->tx_max_pending && | |
88 | (nla_put_u32(skb, ETHTOOL_A_RINGS_TX_MAX, | |
89 | ringparam->tx_max_pending) || | |
90 | nla_put_u32(skb, ETHTOOL_A_RINGS_TX, | |
0b70c256 | 91 | ringparam->tx_pending))) || |
9690ae60 JK |
92 | (kr->rx_buf_len && |
93 | (nla_put_u32(skb, ETHTOOL_A_RINGS_RX_BUF_LEN, kr->rx_buf_len))) || | |
94 | (kr->tcp_data_split && | |
95 | (nla_put_u8(skb, ETHTOOL_A_RINGS_TCP_DATA_SPLIT, | |
1241e329 SS |
96 | kr->tcp_data_split))) || |
97 | (kr->cqe_size && | |
4dc84c06 JW |
98 | (nla_put_u32(skb, ETHTOOL_A_RINGS_CQE_SIZE, kr->cqe_size))) || |
99 | nla_put_u8(skb, ETHTOOL_A_RINGS_TX_PUSH, !!kr->tx_push)) | |
e4a1717b MK |
100 | return -EMSGSIZE; |
101 | ||
102 | return 0; | |
103 | } | |
104 | ||
105 | const struct ethnl_request_ops ethnl_rings_request_ops = { | |
106 | .request_cmd = ETHTOOL_MSG_RINGS_GET, | |
107 | .reply_cmd = ETHTOOL_MSG_RINGS_GET_REPLY, | |
108 | .hdr_attr = ETHTOOL_A_RINGS_HEADER, | |
e4a1717b MK |
109 | .req_info_size = sizeof(struct rings_req_info), |
110 | .reply_data_size = sizeof(struct rings_reply_data), | |
e4a1717b MK |
111 | |
112 | .prepare_data = rings_prepare_data, | |
113 | .reply_size = rings_reply_size, | |
114 | .fill_reply = rings_fill_reply, | |
115 | }; | |
2fc2929e MK |
116 | |
117 | /* RINGS_SET */ | |
118 | ||
ff419afa | 119 | const struct nla_policy ethnl_rings_set_policy[] = { |
329d9c33 JK |
120 | [ETHTOOL_A_RINGS_HEADER] = |
121 | NLA_POLICY_NESTED(ethnl_header_policy), | |
2fc2929e MK |
122 | [ETHTOOL_A_RINGS_RX] = { .type = NLA_U32 }, |
123 | [ETHTOOL_A_RINGS_RX_MINI] = { .type = NLA_U32 }, | |
124 | [ETHTOOL_A_RINGS_RX_JUMBO] = { .type = NLA_U32 }, | |
125 | [ETHTOOL_A_RINGS_TX] = { .type = NLA_U32 }, | |
0b70c256 | 126 | [ETHTOOL_A_RINGS_RX_BUF_LEN] = NLA_POLICY_MIN(NLA_U32, 1), |
1241e329 | 127 | [ETHTOOL_A_RINGS_CQE_SIZE] = NLA_POLICY_MIN(NLA_U32, 1), |
4dc84c06 | 128 | [ETHTOOL_A_RINGS_TX_PUSH] = NLA_POLICY_MAX(NLA_U8, 1), |
2fc2929e MK |
129 | }; |
130 | ||
131 | int ethnl_set_rings(struct sk_buff *skb, struct genl_info *info) | |
132 | { | |
0b70c256 | 133 | struct kernel_ethtool_ringparam kernel_ringparam = {}; |
2fc2929e MK |
134 | struct ethtool_ringparam ringparam = {}; |
135 | struct ethnl_req_info req_info = {}; | |
5028588b | 136 | struct nlattr **tb = info->attrs; |
2fc2929e MK |
137 | const struct nlattr *err_attr; |
138 | const struct ethtool_ops *ops; | |
139 | struct net_device *dev; | |
140 | bool mod = false; | |
141 | int ret; | |
142 | ||
2fc2929e MK |
143 | ret = ethnl_parse_header_dev_get(&req_info, |
144 | tb[ETHTOOL_A_RINGS_HEADER], | |
145 | genl_info_net(info), info->extack, | |
146 | true); | |
147 | if (ret < 0) | |
148 | return ret; | |
149 | dev = req_info.dev; | |
150 | ops = dev->ethtool_ops; | |
151 | ret = -EOPNOTSUPP; | |
152 | if (!ops->get_ringparam || !ops->set_ringparam) | |
153 | goto out_dev; | |
154 | ||
bde292c0 JW |
155 | if (tb[ETHTOOL_A_RINGS_RX_BUF_LEN] && |
156 | !(ops->supported_ring_params & ETHTOOL_RING_USE_RX_BUF_LEN)) { | |
157 | ret = -EOPNOTSUPP; | |
158 | NL_SET_ERR_MSG_ATTR(info->extack, | |
159 | tb[ETHTOOL_A_RINGS_RX_BUF_LEN], | |
160 | "setting rx buf len not supported"); | |
161 | goto out_dev; | |
162 | } | |
163 | ||
164 | if (tb[ETHTOOL_A_RINGS_CQE_SIZE] && | |
165 | !(ops->supported_ring_params & ETHTOOL_RING_USE_CQE_SIZE)) { | |
166 | ret = -EOPNOTSUPP; | |
167 | NL_SET_ERR_MSG_ATTR(info->extack, | |
168 | tb[ETHTOOL_A_RINGS_CQE_SIZE], | |
169 | "setting cqe size not supported"); | |
170 | goto out_dev; | |
171 | } | |
172 | ||
4dc84c06 JW |
173 | if (tb[ETHTOOL_A_RINGS_TX_PUSH] && |
174 | !(ops->supported_ring_params & ETHTOOL_RING_USE_TX_PUSH)) { | |
175 | ret = -EOPNOTSUPP; | |
176 | NL_SET_ERR_MSG_ATTR(info->extack, | |
177 | tb[ETHTOOL_A_RINGS_TX_PUSH], | |
178 | "setting tx push not supported"); | |
179 | goto out_dev; | |
180 | } | |
181 | ||
2fc2929e MK |
182 | rtnl_lock(); |
183 | ret = ethnl_ops_begin(dev); | |
184 | if (ret < 0) | |
185 | goto out_rtnl; | |
74624944 | 186 | ops->get_ringparam(dev, &ringparam, &kernel_ringparam, info->extack); |
2fc2929e MK |
187 | |
188 | ethnl_update_u32(&ringparam.rx_pending, tb[ETHTOOL_A_RINGS_RX], &mod); | |
189 | ethnl_update_u32(&ringparam.rx_mini_pending, | |
190 | tb[ETHTOOL_A_RINGS_RX_MINI], &mod); | |
191 | ethnl_update_u32(&ringparam.rx_jumbo_pending, | |
192 | tb[ETHTOOL_A_RINGS_RX_JUMBO], &mod); | |
193 | ethnl_update_u32(&ringparam.tx_pending, tb[ETHTOOL_A_RINGS_TX], &mod); | |
0b70c256 HC |
194 | ethnl_update_u32(&kernel_ringparam.rx_buf_len, |
195 | tb[ETHTOOL_A_RINGS_RX_BUF_LEN], &mod); | |
1241e329 SS |
196 | ethnl_update_u32(&kernel_ringparam.cqe_size, |
197 | tb[ETHTOOL_A_RINGS_CQE_SIZE], &mod); | |
4dc84c06 JW |
198 | ethnl_update_u8(&kernel_ringparam.tx_push, |
199 | tb[ETHTOOL_A_RINGS_TX_PUSH], &mod); | |
2fc2929e MK |
200 | ret = 0; |
201 | if (!mod) | |
202 | goto out_ops; | |
203 | ||
204 | /* ensure new ring parameters are within limits */ | |
205 | if (ringparam.rx_pending > ringparam.rx_max_pending) | |
206 | err_attr = tb[ETHTOOL_A_RINGS_RX]; | |
207 | else if (ringparam.rx_mini_pending > ringparam.rx_mini_max_pending) | |
208 | err_attr = tb[ETHTOOL_A_RINGS_RX_MINI]; | |
209 | else if (ringparam.rx_jumbo_pending > ringparam.rx_jumbo_max_pending) | |
210 | err_attr = tb[ETHTOOL_A_RINGS_RX_JUMBO]; | |
211 | else if (ringparam.tx_pending > ringparam.tx_max_pending) | |
212 | err_attr = tb[ETHTOOL_A_RINGS_TX]; | |
213 | else | |
214 | err_attr = NULL; | |
215 | if (err_attr) { | |
216 | ret = -EINVAL; | |
217 | NL_SET_ERR_MSG_ATTR(info->extack, err_attr, | |
5ec82c49 | 218 | "requested ring size exceeds maximum"); |
2fc2929e MK |
219 | goto out_ops; |
220 | } | |
221 | ||
74624944 HC |
222 | ret = dev->ethtool_ops->set_ringparam(dev, &ringparam, |
223 | &kernel_ringparam, info->extack); | |
bc9d1c99 MK |
224 | if (ret < 0) |
225 | goto out_ops; | |
226 | ethtool_notify(dev, ETHTOOL_MSG_RINGS_NTF, NULL); | |
2fc2929e MK |
227 | |
228 | out_ops: | |
229 | ethnl_ops_complete(dev); | |
230 | out_rtnl: | |
231 | rtnl_unlock(); | |
232 | out_dev: | |
34ac17ec | 233 | ethnl_parse_header_dev_put(&req_info); |
2fc2929e MK |
234 | return ret; |
235 | } |