1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2 /* Copyright (C) 2017 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_link_state(struct net_device *netdev, int vf, 150 int link_state) 151 { 152 struct nfp_app *app = nfp_app_from_netdev(netdev); 153 unsigned int vf_offset; 154 u8 vf_ctrl; 155 int err; 156 157 err = nfp_net_sriov_check(app, vf, NFP_NET_VF_CFG_MB_CAP_LINK_STATE, 158 "link_state"); 159 if (err) 160 return err; 161 162 switch (link_state) { 163 case IFLA_VF_LINK_STATE_AUTO: 164 case IFLA_VF_LINK_STATE_ENABLE: 165 case IFLA_VF_LINK_STATE_DISABLE: 166 break; 167 default: 168 return -EINVAL; 169 } 170 171 /* Write link state to VF entry in VF config symbol */ 172 vf_offset = NFP_NET_VF_CFG_MB_SZ + vf * NFP_NET_VF_CFG_SZ + 173 NFP_NET_VF_CFG_CTRL; 174 vf_ctrl = readb(app->pf->vfcfg_tbl2 + vf_offset); 175 vf_ctrl &= ~NFP_NET_VF_CFG_CTRL_LINK_STATE; 176 vf_ctrl |= FIELD_PREP(NFP_NET_VF_CFG_CTRL_LINK_STATE, link_state); 177 writeb(vf_ctrl, app->pf->vfcfg_tbl2 + vf_offset); 178 179 return nfp_net_sriov_update(app, vf, NFP_NET_VF_CFG_MB_UPD_LINK_STATE, 180 "link state"); 181 } 182 183 int nfp_app_get_vf_config(struct net_device *netdev, int vf, 184 struct ifla_vf_info *ivi) 185 { 186 struct nfp_app *app = nfp_app_from_netdev(netdev); 187 unsigned int vf_offset; 188 u16 vlan_tci; 189 u32 mac_hi; 190 u16 mac_lo; 191 u8 flags; 192 int err; 193 194 err = nfp_net_sriov_check(app, vf, 0, ""); 195 if (err) 196 return err; 197 198 vf_offset = NFP_NET_VF_CFG_MB_SZ + vf * NFP_NET_VF_CFG_SZ; 199 200 mac_hi = readl(app->pf->vfcfg_tbl2 + vf_offset); 201 mac_lo = readw(app->pf->vfcfg_tbl2 + vf_offset + NFP_NET_VF_CFG_MAC_LO); 202 203 flags = readb(app->pf->vfcfg_tbl2 + vf_offset + NFP_NET_VF_CFG_CTRL); 204 vlan_tci = readw(app->pf->vfcfg_tbl2 + vf_offset + NFP_NET_VF_CFG_VLAN); 205 206 memset(ivi, 0, sizeof(*ivi)); 207 ivi->vf = vf; 208 209 put_unaligned_be32(mac_hi, &ivi->mac[0]); 210 put_unaligned_be16(mac_lo, &ivi->mac[4]); 211 212 ivi->vlan = FIELD_GET(NFP_NET_VF_CFG_VLAN_VID, vlan_tci); 213 ivi->qos = FIELD_GET(NFP_NET_VF_CFG_VLAN_QOS, vlan_tci); 214 215 ivi->spoofchk = FIELD_GET(NFP_NET_VF_CFG_CTRL_SPOOF, flags); 216 ivi->linkstate = FIELD_GET(NFP_NET_VF_CFG_CTRL_LINK_STATE, flags); 217 218 return 0; 219 } 220