drivers/net/ethernet/netronome/nfp/nfp_net_sriov.c

   1 /*
   2  * Copyright (C) 2017 Netronome Systems, Inc.
   3  *
   4  * This software is dual licensed under the GNU General License Version 2,
   5  * June 1991 as shown in the file COPYING in the top-level directory of this
   6  * source tree or the BSD 2-Clause License provided below.  You have the
   7  * option to license this software under the complete terms of either license.
   8  *
   9  * The BSD 2-Clause License:
  10  *
  11  *     Redistribution and use in source and binary forms, with or
  12  *     without modification, are permitted provided that the following
  13  *     conditions are met:
  14  *
  15  *      1. Redistributions of source code must retain the above
  16  *         copyright notice, this list of conditions and the following
  17  *         disclaimer.
  18  *
  19  *      2. Redistributions in binary form must reproduce the above
  20  *         copyright notice, this list of conditions and the following
  21  *         disclaimer in the documentation and/or other materials
  22  *         provided with the distribution.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  28  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  29  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  30  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  31  * SOFTWARE.
  32  */
  33
  34 #include <linux/bitfield.h>
  35 #include <linux/errno.h>
  36 #include <linux/etherdevice.h>
  37 #include <linux/if_link.h>
  38 #include <linux/if_ether.h>
  39
  40 #include "nfpcore/nfp_cpp.h"
  41 #include "nfp_app.h"
  42 #include "nfp_main.h"
  43 #include "nfp_net_ctrl.h"
  44 #include "nfp_net.h"
  45 #include "nfp_net_sriov.h"
  46
  47 static int
  48 nfp_net_sriov_check(struct nfp_app *app, int vf, u16 cap, const char *msg)
  49 {
  50         u16 cap_vf;
  51
  52         if (!app || !app->pf->vfcfg_tbl2)
  53                 return -EOPNOTSUPP;
  54
  55         cap_vf = readw(app->pf->vfcfg_tbl2 + NFP_NET_VF_CFG_MB_CAP);
  56         if ((cap_vf & cap) != cap) {
  57                 nfp_warn(app->pf->cpp, "ndo_set_vf_%s not supported\n", msg);
  58                 return -EOPNOTSUPP;
  59         }
  60
  61         if (vf < 0 || vf >= app->pf->num_vfs) {
  62                 nfp_warn(app->pf->cpp, "invalid VF id %d\n", vf);
  63                 return -EINVAL;
  64         }
  65
  66         return 0;
  67 }
  68
  69 static int
  70 nfp_net_sriov_update(struct nfp_app *app, int vf, u16 update, const char *msg)
  71 {
  72         struct nfp_net *nn;
  73         int ret;
  74
  75         /* Write update info to mailbox in VF config symbol */
  76         writeb(vf, app->pf->vfcfg_tbl2 + NFP_NET_VF_CFG_MB_VF_NUM);
  77         writew(update, app->pf->vfcfg_tbl2 + NFP_NET_VF_CFG_MB_UPD);
  78
  79         nn = list_first_entry(&app->pf->vnics, struct nfp_net, vnic_list);
  80         /* Signal VF reconfiguration */
  81         ret = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_VF);
  82         if (ret)
  83                 return ret;
  84
  85         ret = readw(app->pf->vfcfg_tbl2 + NFP_NET_VF_CFG_MB_RET);
  86         if (ret)
  87                 nfp_warn(app->pf->cpp,
  88                          "FW refused VF %s update with errno: %d\n", msg, ret);
  89         return -ret;
  90 }
  91
  92 int nfp_app_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
  93 {
  94         struct nfp_app *app = nfp_app_from_netdev(netdev);
  95         unsigned int vf_offset;
  96         int err;
  97
  98         err = nfp_net_sriov_check(app, vf, NFP_NET_VF_CFG_MB_CAP_MAC, "mac");
  99         if (err)
 100                 return err;
 101
 102         if (is_multicast_ether_addr(mac)) {
 103                 nfp_warn(app->pf->cpp,
 104                          "invalid Ethernet address %pM for VF id %d\n",
 105                          mac, vf);
 106                 return -EINVAL;
 107         }
 108
 109         /* Write MAC to VF entry in VF config symbol */
 110         vf_offset = NFP_NET_VF_CFG_MB_SZ + vf * NFP_NET_VF_CFG_SZ;
 111         writel(get_unaligned_be32(mac), app->pf->vfcfg_tbl2 + vf_offset);
 112         writew(get_unaligned_be16(mac + 4),
 113                app->pf->vfcfg_tbl2 + vf_offset + NFP_NET_VF_CFG_MAC_LO);
 114
 115         err = nfp_net_sriov_update(app, vf, NFP_NET_VF_CFG_MB_UPD_MAC, "MAC");
 116         if (!err)
 117                 nfp_info(app->pf->cpp,
 118                          "MAC %pM set on VF %d, reload the VF driver to make this change effective.\n",
 119                          mac, vf);
 120
 121         return err;
 122 }
 123
 124 int nfp_app_set_vf_vlan(struct net_device *netdev, int vf, u16 vlan, u8 qos,
 125                         __be16 vlan_proto)
 126 {
 127         struct nfp_app *app = nfp_app_from_netdev(netdev);
 128         unsigned int vf_offset;
 129         u16 vlan_tci;
 130         int err;
 131
 132         err = nfp_net_sriov_check(app, vf, NFP_NET_VF_CFG_MB_CAP_VLAN, "vlan");
 133         if (err)
 134                 return err;
 135
 136         if (vlan_proto != htons(ETH_P_8021Q))
 137                 return -EOPNOTSUPP;
 138
 139         if (vlan > 4095 || qos > 7) {
 140                 nfp_warn(app->pf->cpp,
 141                          "invalid vlan id or qos for VF id %d\n", vf);
 142                 return -EINVAL;
 143         }
 144
 145         /* Write VLAN tag to VF entry in VF config symbol */
 146         vlan_tci = FIELD_PREP(NFP_NET_VF_CFG_VLAN_VID, vlan) |
 147                 FIELD_PREP(NFP_NET_VF_CFG_VLAN_QOS, qos);
 148         vf_offset = NFP_NET_VF_CFG_MB_SZ + vf * NFP_NET_VF_CFG_SZ;
 149         writew(vlan_tci, app->pf->vfcfg_tbl2 + vf_offset + NFP_NET_VF_CFG_VLAN);
 150
 151         return nfp_net_sriov_update(app, vf, NFP_NET_VF_CFG_MB_UPD_VLAN,
 152                                     "vlan");
 153 }
 154
 155 int nfp_app_set_vf_spoofchk(struct net_device *netdev, int vf, bool enable)
 156 {
 157         struct nfp_app *app = nfp_app_from_netdev(netdev);
 158         unsigned int vf_offset;
 159         u8 vf_ctrl;
 160         int err;
 161
 162         err = nfp_net_sriov_check(app, vf, NFP_NET_VF_CFG_MB_CAP_SPOOF,
 163                                   "spoofchk");
 164         if (err)
 165                 return err;
 166
 167         /* Write spoof check control bit to VF entry in VF config symbol */
 168         vf_offset = NFP_NET_VF_CFG_MB_SZ + vf * NFP_NET_VF_CFG_SZ +
 169                 NFP_NET_VF_CFG_CTRL;
 170         vf_ctrl = readb(app->pf->vfcfg_tbl2 + vf_offset);
 171         vf_ctrl &= ~NFP_NET_VF_CFG_CTRL_SPOOF;
 172         vf_ctrl |= FIELD_PREP(NFP_NET_VF_CFG_CTRL_SPOOF, enable);
 173         writeb(vf_ctrl, app->pf->vfcfg_tbl2 + vf_offset);
 174
 175         return nfp_net_sriov_update(app, vf, NFP_NET_VF_CFG_MB_UPD_SPOOF,
 176                                     "spoofchk");
 177 }
 178
 179 int nfp_app_set_vf_link_state(struct net_device *netdev, int vf,
 180                               int link_state)
 181 {
 182         struct nfp_app *app = nfp_app_from_netdev(netdev);
 183         unsigned int vf_offset;
 184         u8 vf_ctrl;
 185         int err;
 186
 187         err = nfp_net_sriov_check(app, vf, NFP_NET_VF_CFG_MB_CAP_LINK_STATE,
 188                                   "link_state");
 189         if (err)
 190                 return err;
 191
 192         switch (link_state) {
 193         case IFLA_VF_LINK_STATE_AUTO:
 194         case IFLA_VF_LINK_STATE_ENABLE:
 195         case IFLA_VF_LINK_STATE_DISABLE:
 196                 break;
 197         default:
 198                 return -EINVAL;
 199         }
 200
 201         /* Write link state to VF entry in VF config symbol */
 202         vf_offset = NFP_NET_VF_CFG_MB_SZ + vf * NFP_NET_VF_CFG_SZ +
 203                 NFP_NET_VF_CFG_CTRL;
 204         vf_ctrl = readb(app->pf->vfcfg_tbl2 + vf_offset);
 205         vf_ctrl &= ~NFP_NET_VF_CFG_CTRL_LINK_STATE;
 206         vf_ctrl |= FIELD_PREP(NFP_NET_VF_CFG_CTRL_LINK_STATE, link_state);
 207         writeb(vf_ctrl, app->pf->vfcfg_tbl2 + vf_offset);
 208
 209         return nfp_net_sriov_update(app, vf, NFP_NET_VF_CFG_MB_UPD_LINK_STATE,
 210                                     "link state");
 211 }
 212
 213 int nfp_app_get_vf_config(struct net_device *netdev, int vf,
 214                           struct ifla_vf_info *ivi)
 215 {
 216         struct nfp_app *app = nfp_app_from_netdev(netdev);
 217         unsigned int vf_offset;
 218         u16 vlan_tci;
 219         u32 mac_hi;
 220         u16 mac_lo;
 221         u8 flags;
 222         int err;
 223
 224         err = nfp_net_sriov_check(app, vf, 0, "");
 225         if (err)
 226                 return err;
 227
 228         vf_offset = NFP_NET_VF_CFG_MB_SZ + vf * NFP_NET_VF_CFG_SZ;
 229
 230         mac_hi = readl(app->pf->vfcfg_tbl2 + vf_offset);
 231         mac_lo = readw(app->pf->vfcfg_tbl2 + vf_offset + NFP_NET_VF_CFG_MAC_LO);
 232
 233         flags = readb(app->pf->vfcfg_tbl2 + vf_offset + NFP_NET_VF_CFG_CTRL);
 234         vlan_tci = readw(app->pf->vfcfg_tbl2 + vf_offset + NFP_NET_VF_CFG_VLAN);
 235
 236         memset(ivi, 0, sizeof(*ivi));
 237         ivi->vf = vf;
 238
 239         put_unaligned_be32(mac_hi, &ivi->mac[0]);
 240         put_unaligned_be16(mac_lo, &ivi->mac[4]);
 241
 242         ivi->vlan = FIELD_GET(NFP_NET_VF_CFG_VLAN_VID, vlan_tci);
 243         ivi->qos = FIELD_GET(NFP_NET_VF_CFG_VLAN_QOS, vlan_tci);
 244
 245         ivi->spoofchk = FIELD_GET(NFP_NET_VF_CFG_CTRL_SPOOF, flags);
 246         ivi->linkstate = FIELD_GET(NFP_NET_VF_CFG_CTRL_LINK_STATE, flags);
 247
 248         return 0;
 249 }