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 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 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 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 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 } 124 125 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 } 148 149 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 } 172 173 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 } 206 207 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