1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 /* Copyright (C) 2017-2019 Netronome Systems, Inc. */
3
4 #include <linux/bitfield.h>
5 #include <linux/errno.h>
6 #include <linux/etherdevice.h>
7 #include <linux/if_link.h>
8 #include <linux/if_ether.h>
9
10 #include "nfpcore/nfp_cpp.h"
11 #include "nfp_app.h"
12 #include "nfp_main.h"
13 #include "nfp_net_ctrl.h"
14 #include "nfp_net.h"
15 #include "nfp_net_sriov.h"
16
17 static int
nfp_net_sriov_check(struct nfp_app * app,int vf,u16 cap,const char * msg)18 nfp_net_sriov_check(struct nfp_app *app, int vf, u16 cap, const char *msg)
19 {
20 u16 cap_vf;
21
22 if (!app || !app->pf->vfcfg_tbl2)
23 return -EOPNOTSUPP;
24
25 cap_vf = readw(app->pf->vfcfg_tbl2 + NFP_NET_VF_CFG_MB_CAP);
26 if ((cap_vf & cap) != cap) {
27 nfp_warn(app->pf->cpp, "ndo_set_vf_%s not supported\n", msg);
28 return -EOPNOTSUPP;
29 }
30
31 if (vf < 0 || vf >= app->pf->num_vfs) {
32 nfp_warn(app->pf->cpp, "invalid VF id %d\n", vf);
33 return -EINVAL;
34 }
35
36 return 0;
37 }
38
39 static int
nfp_net_sriov_update(struct nfp_app * app,int vf,u16 update,const char * msg)40 nfp_net_sriov_update(struct nfp_app *app, int vf, u16 update, const char *msg)
41 {
42 struct nfp_net *nn;
43 int ret;
44
45 /* Write update info to mailbox in VF config symbol */
46 writeb(vf, app->pf->vfcfg_tbl2 + NFP_NET_VF_CFG_MB_VF_NUM);
47 writew(update, app->pf->vfcfg_tbl2 + NFP_NET_VF_CFG_MB_UPD);
48
49 nn = list_first_entry(&app->pf->vnics, struct nfp_net, vnic_list);
50 /* Signal VF reconfiguration */
51 ret = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_VF);
52 if (ret)
53 return ret;
54
55 ret = readw(app->pf->vfcfg_tbl2 + NFP_NET_VF_CFG_MB_RET);
56 if (ret)
57 nfp_warn(app->pf->cpp,
58 "FW refused VF %s update with errno: %d\n", msg, ret);
59 return -ret;
60 }
61
nfp_app_set_vf_mac(struct net_device * netdev,int vf,u8 * mac)62 int nfp_app_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
63 {
64 struct nfp_app *app = nfp_app_from_netdev(netdev);
65 unsigned int vf_offset;
66 int err;
67
68 err = nfp_net_sriov_check(app, vf, NFP_NET_VF_CFG_MB_CAP_MAC, "mac");
69 if (err)
70 return err;
71
72 if (is_multicast_ether_addr(mac)) {
73 nfp_warn(app->pf->cpp,
74 "invalid Ethernet address %pM for VF id %d\n",
75 mac, vf);
76 return -EINVAL;
77 }
78
79 /* Write MAC to VF entry in VF config symbol */
80 vf_offset = NFP_NET_VF_CFG_MB_SZ + vf * NFP_NET_VF_CFG_SZ;
81 writel(get_unaligned_be32(mac), app->pf->vfcfg_tbl2 + vf_offset);
82 writew(get_unaligned_be16(mac + 4),
83 app->pf->vfcfg_tbl2 + vf_offset + NFP_NET_VF_CFG_MAC_LO);
84
85 err = nfp_net_sriov_update(app, vf, NFP_NET_VF_CFG_MB_UPD_MAC, "MAC");
86 if (!err)
87 nfp_info(app->pf->cpp,
88 "MAC %pM set on VF %d, reload the VF driver to make this change effective.\n",
89 mac, vf);
90
91 return err;
92 }
93
nfp_app_set_vf_vlan(struct net_device * netdev,int vf,u16 vlan,u8 qos,__be16 vlan_proto)94 int nfp_app_set_vf_vlan(struct net_device *netdev, int vf, u16 vlan, u8 qos,
95 __be16 vlan_proto)
96 {
97 struct nfp_app *app = nfp_app_from_netdev(netdev);
98 unsigned int vf_offset;
99 u16 vlan_tci;
100 int err;
101
102 err = nfp_net_sriov_check(app, vf, NFP_NET_VF_CFG_MB_CAP_VLAN, "vlan");
103 if (err)
104 return err;
105
106 if (vlan_proto != htons(ETH_P_8021Q))
107 return -EOPNOTSUPP;
108
109 if (vlan > 4095 || qos > 7) {
110 nfp_warn(app->pf->cpp,
111 "invalid vlan id or qos for VF id %d\n", vf);
112 return -EINVAL;
113 }
114
115 /* Write VLAN tag to VF entry in VF config symbol */
116 vlan_tci = FIELD_PREP(NFP_NET_VF_CFG_VLAN_VID, vlan) |
117 FIELD_PREP(NFP_NET_VF_CFG_VLAN_QOS, qos);
118 vf_offset = NFP_NET_VF_CFG_MB_SZ + vf * NFP_NET_VF_CFG_SZ;
119 writew(vlan_tci, app->pf->vfcfg_tbl2 + vf_offset + NFP_NET_VF_CFG_VLAN);
120
121 return nfp_net_sriov_update(app, vf, NFP_NET_VF_CFG_MB_UPD_VLAN,
122 "vlan");
123 }
124
nfp_app_set_vf_spoofchk(struct net_device * netdev,int vf,bool enable)125 int nfp_app_set_vf_spoofchk(struct net_device *netdev, int vf, bool enable)
126 {
127 struct nfp_app *app = nfp_app_from_netdev(netdev);
128 unsigned int vf_offset;
129 u8 vf_ctrl;
130 int err;
131
132 err = nfp_net_sriov_check(app, vf, NFP_NET_VF_CFG_MB_CAP_SPOOF,
133 "spoofchk");
134 if (err)
135 return err;
136
137 /* Write spoof check control bit to VF entry in VF config symbol */
138 vf_offset = NFP_NET_VF_CFG_MB_SZ + vf * NFP_NET_VF_CFG_SZ +
139 NFP_NET_VF_CFG_CTRL;
140 vf_ctrl = readb(app->pf->vfcfg_tbl2 + vf_offset);
141 vf_ctrl &= ~NFP_NET_VF_CFG_CTRL_SPOOF;
142 vf_ctrl |= FIELD_PREP(NFP_NET_VF_CFG_CTRL_SPOOF, enable);
143 writeb(vf_ctrl, app->pf->vfcfg_tbl2 + vf_offset);
144
145 return nfp_net_sriov_update(app, vf, NFP_NET_VF_CFG_MB_UPD_SPOOF,
146 "spoofchk");
147 }
148
nfp_app_set_vf_trust(struct net_device * netdev,int vf,bool enable)149 int nfp_app_set_vf_trust(struct net_device *netdev, int vf, bool enable)
150 {
151 struct nfp_app *app = nfp_app_from_netdev(netdev);
152 unsigned int vf_offset;
153 u8 vf_ctrl;
154 int err;
155
156 err = nfp_net_sriov_check(app, vf, NFP_NET_VF_CFG_MB_CAP_TRUST,
157 "trust");
158 if (err)
159 return err;
160
161 /* Write trust control bit to VF entry in VF config symbol */
162 vf_offset = NFP_NET_VF_CFG_MB_SZ + vf * NFP_NET_VF_CFG_SZ +
163 NFP_NET_VF_CFG_CTRL;
164 vf_ctrl = readb(app->pf->vfcfg_tbl2 + vf_offset);
165 vf_ctrl &= ~NFP_NET_VF_CFG_CTRL_TRUST;
166 vf_ctrl |= FIELD_PREP(NFP_NET_VF_CFG_CTRL_TRUST, enable);
167 writeb(vf_ctrl, app->pf->vfcfg_tbl2 + vf_offset);
168
169 return nfp_net_sriov_update(app, vf, NFP_NET_VF_CFG_MB_UPD_TRUST,
170 "trust");
171 }
172
nfp_app_set_vf_link_state(struct net_device * netdev,int vf,int link_state)173 int nfp_app_set_vf_link_state(struct net_device *netdev, int vf,
174 int link_state)
175 {
176 struct nfp_app *app = nfp_app_from_netdev(netdev);
177 unsigned int vf_offset;
178 u8 vf_ctrl;
179 int err;
180
181 err = nfp_net_sriov_check(app, vf, NFP_NET_VF_CFG_MB_CAP_LINK_STATE,
182 "link_state");
183 if (err)
184 return err;
185
186 switch (link_state) {
187 case IFLA_VF_LINK_STATE_AUTO:
188 case IFLA_VF_LINK_STATE_ENABLE:
189 case IFLA_VF_LINK_STATE_DISABLE:
190 break;
191 default:
192 return -EINVAL;
193 }
194
195 /* Write link state to VF entry in VF config symbol */
196 vf_offset = NFP_NET_VF_CFG_MB_SZ + vf * NFP_NET_VF_CFG_SZ +
197 NFP_NET_VF_CFG_CTRL;
198 vf_ctrl = readb(app->pf->vfcfg_tbl2 + vf_offset);
199 vf_ctrl &= ~NFP_NET_VF_CFG_CTRL_LINK_STATE;
200 vf_ctrl |= FIELD_PREP(NFP_NET_VF_CFG_CTRL_LINK_STATE, link_state);
201 writeb(vf_ctrl, app->pf->vfcfg_tbl2 + vf_offset);
202
203 return nfp_net_sriov_update(app, vf, NFP_NET_VF_CFG_MB_UPD_LINK_STATE,
204 "link state");
205 }
206
nfp_app_get_vf_config(struct net_device * netdev,int vf,struct ifla_vf_info * ivi)207 int nfp_app_get_vf_config(struct net_device *netdev, int vf,
208 struct ifla_vf_info *ivi)
209 {
210 struct nfp_app *app = nfp_app_from_netdev(netdev);
211 unsigned int vf_offset;
212 u16 vlan_tci;
213 u32 mac_hi;
214 u16 mac_lo;
215 u8 flags;
216 int err;
217
218 err = nfp_net_sriov_check(app, vf, 0, "");
219 if (err)
220 return err;
221
222 vf_offset = NFP_NET_VF_CFG_MB_SZ + vf * NFP_NET_VF_CFG_SZ;
223
224 mac_hi = readl(app->pf->vfcfg_tbl2 + vf_offset);
225 mac_lo = readw(app->pf->vfcfg_tbl2 + vf_offset + NFP_NET_VF_CFG_MAC_LO);
226
227 flags = readb(app->pf->vfcfg_tbl2 + vf_offset + NFP_NET_VF_CFG_CTRL);
228 vlan_tci = readw(app->pf->vfcfg_tbl2 + vf_offset + NFP_NET_VF_CFG_VLAN);
229
230 memset(ivi, 0, sizeof(*ivi));
231 ivi->vf = vf;
232
233 put_unaligned_be32(mac_hi, &ivi->mac[0]);
234 put_unaligned_be16(mac_lo, &ivi->mac[4]);
235
236 ivi->vlan = FIELD_GET(NFP_NET_VF_CFG_VLAN_VID, vlan_tci);
237 ivi->qos = FIELD_GET(NFP_NET_VF_CFG_VLAN_QOS, vlan_tci);
238
239 ivi->spoofchk = FIELD_GET(NFP_NET_VF_CFG_CTRL_SPOOF, flags);
240 ivi->trusted = FIELD_GET(NFP_NET_VF_CFG_CTRL_TRUST, flags);
241 ivi->linkstate = FIELD_GET(NFP_NET_VF_CFG_CTRL_LINK_STATE, flags);
242
243 return 0;
244 }
245