drivers/net/ixgbe/ixgbe_sriov.c

   1 /*******************************************************************************
   2
   3   Intel 10 Gigabit PCI Express Linux driver
   4   Copyright(c) 1999 - 2009 Intel Corporation.
   5
   6   This program is free software; you can redistribute it and/or modify it
   7   under the terms and conditions of the GNU General Public License,
   8   version 2, as published by the Free Software Foundation.
   9
  10   This program is distributed in the hope it will be useful, but WITHOUT
  11   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13   more details.
  14
  15   You should have received a copy of the GNU General Public License along with
  16   this program; if not, write to the Free Software Foundation, Inc.,
  17   51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  18
  19   The full GNU General Public License is included in this distribution in
  20   the file called "COPYING".
  21
  22   Contact Information:
  23   e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  24   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  25
  26 *******************************************************************************/
  27
  28
  29 #include <linux/types.h>
  30 #include <linux/module.h>
  31 #include <linux/pci.h>
  32 #include <linux/netdevice.h>
  33 #include <linux/vmalloc.h>
  34 #include <linux/string.h>
  35 #include <linux/in.h>
  36 #include <linux/ip.h>
  37 #include <linux/tcp.h>
  38 #include <linux/ipv6.h>
  39 #ifdef NETIF_F_HW_VLAN_TX
  40 #include <linux/if_vlan.h>
  41 #endif
  42
  43 #include "ixgbe.h"
  44
  45 #include "ixgbe_sriov.h"
  46
  47 int ixgbe_set_vf_multicasts(struct ixgbe_adapter *adapter,
  48                             int entries, u16 *hash_list, u32 vf)
  49 {
  50         struct vf_data_storage *vfinfo = &adapter->vfinfo[vf];
  51         int i;
  52
  53         /* only so many hash values supported */
  54         entries = min(entries, IXGBE_MAX_VF_MC_ENTRIES);
  55
  56         /*
  57          * salt away the number of multi cast addresses assigned
  58          * to this VF for later use to restore when the PF multi cast
  59          * list changes
  60          */
  61         vfinfo->num_vf_mc_hashes = entries;
  62
  63         /*
  64          * VFs are limited to using the MTA hash table for their multicast
  65          * addresses
  66          */
  67         for (i = 0; i < entries; i++) {
  68                 vfinfo->vf_mc_hashes[i] = hash_list[i];;
  69         }
  70
  71         /* Flush and reset the mta with the new values */
  72         ixgbe_set_rx_mode(adapter->netdev);
  73
  74         return 0;
  75 }
  76
  77 void ixgbe_restore_vf_multicasts(struct ixgbe_adapter *adapter)
  78 {
  79         struct ixgbe_hw *hw = &adapter->hw;
  80         struct vf_data_storage *vfinfo;
  81         int i, j;
  82         u32 vector_bit;
  83         u32 vector_reg;
  84         u32 mta_reg;
  85
  86         for (i = 0; i < adapter->num_vfs; i++) {
  87                 vfinfo = &adapter->vfinfo[i];
  88                 for (j = 0; j < vfinfo->num_vf_mc_hashes; j++) {
  89                         hw->addr_ctrl.mta_in_use++;
  90                         vector_reg = (vfinfo->vf_mc_hashes[j] >> 5) & 0x7F;
  91                         vector_bit = vfinfo->vf_mc_hashes[j] & 0x1F;
  92                         mta_reg = IXGBE_READ_REG(hw, IXGBE_MTA(vector_reg));
  93                         mta_reg |= (1 << vector_bit);
  94                         IXGBE_WRITE_REG(hw, IXGBE_MTA(vector_reg), mta_reg);
  95                 }
  96         }
  97 }
  98
  99 int ixgbe_set_vf_vlan(struct ixgbe_adapter *adapter, int add, int vid, u32 vf)
 100 {
 101         u32 ctrl;
 102
 103         /* Check if global VLAN already set, if not set it */
 104         ctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_VLNCTRL);
 105         if (!(ctrl & IXGBE_VLNCTRL_VFE)) {
 106                 /* enable VLAN tag insert/strip */
 107                 ctrl |= IXGBE_VLNCTRL_VFE;
 108                 ctrl &= ~IXGBE_VLNCTRL_CFIEN;
 109                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_VLNCTRL, ctrl);
 110         }
 111
 112         return adapter->hw.mac.ops.set_vfta(&adapter->hw, vid, vf, (bool)add);
 113 }
 114
 115
 116 void ixgbe_set_vmolr(struct ixgbe_hw *hw, u32 vf)
 117 {
 118         u32 vmolr = IXGBE_READ_REG(hw, IXGBE_VMOLR(vf));
 119         vmolr |= (IXGBE_VMOLR_AUPE |
 120                   IXGBE_VMOLR_ROMPE |
 121                   IXGBE_VMOLR_ROPE |
 122                   IXGBE_VMOLR_BAM);
 123         IXGBE_WRITE_REG(hw, IXGBE_VMOLR(vf), vmolr);
 124 }
 125
 126 inline void ixgbe_vf_reset_event(struct ixgbe_adapter *adapter, u32 vf)
 127 {
 128         struct ixgbe_hw *hw = &adapter->hw;
 129
 130         /* reset offloads to defaults */
 131         ixgbe_set_vmolr(hw, vf);
 132
 133
 134         /* reset multicast table array for vf */
 135         adapter->vfinfo[vf].num_vf_mc_hashes = 0;
 136
 137         /* Flush and reset the mta with the new values */
 138         ixgbe_set_rx_mode(adapter->netdev);
 139
 140         if (adapter->vfinfo[vf].rar > 0) {
 141                 adapter->hw.mac.ops.clear_rar(&adapter->hw,
 142                                               adapter->vfinfo[vf].rar);
 143                 adapter->vfinfo[vf].rar = -1;
 144         }
 145 }
 146
 147 int ixgbe_set_vf_mac(struct ixgbe_adapter *adapter,
 148                           int vf, unsigned char *mac_addr)
 149 {
 150         struct ixgbe_hw *hw = &adapter->hw;
 151
 152         adapter->vfinfo[vf].rar = hw->mac.ops.set_rar(hw, vf + 1, mac_addr,
 153                                                       vf, IXGBE_RAH_AV);
 154         if (adapter->vfinfo[vf].rar < 0) {
 155                 DPRINTK(DRV, ERR, "Could not set MAC Filter for VF %d\n", vf);
 156                 return -1;
 157         }
 158
 159         memcpy(adapter->vfinfo[vf].vf_mac_addresses, mac_addr, 6);
 160
 161         return 0;
 162 }
 163
 164 int ixgbe_vf_configuration(struct pci_dev *pdev, unsigned int event_mask)
 165 {
 166         unsigned char vf_mac_addr[6];
 167         struct net_device *netdev = pci_get_drvdata(pdev);
 168         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 169         unsigned int vfn = (event_mask & 0x3f);
 170
 171         bool enable = ((event_mask & 0x10000000U) != 0);
 172
 173         if (enable) {
 174                 random_ether_addr(vf_mac_addr);
 175                 DPRINTK(PROBE, INFO, "IOV: VF %d is enabled "
 176                        "mac %02X:%02X:%02X:%02X:%02X:%02X\n",
 177                        vfn,
 178                        vf_mac_addr[0], vf_mac_addr[1], vf_mac_addr[2],
 179                        vf_mac_addr[3], vf_mac_addr[4], vf_mac_addr[5]);
 180                 /*
 181                  * Store away the VF "permananet" MAC address, it will ask
 182                  * for it later.
 183                  */
 184                 memcpy(adapter->vfinfo[vfn].vf_mac_addresses, vf_mac_addr, 6);
 185         }
 186
 187         return 0;
 188 }
 189
 190 inline void ixgbe_vf_reset_msg(struct ixgbe_adapter *adapter, u32 vf)
 191 {
 192         struct ixgbe_hw *hw = &adapter->hw;
 193         u32 reg;
 194         u32 reg_offset, vf_shift;
 195
 196         vf_shift = vf % 32;
 197         reg_offset = vf / 32;
 198
 199         /* enable transmit and receive for vf */
 200         reg = IXGBE_READ_REG(hw, IXGBE_VFTE(reg_offset));
 201         reg |= (reg | (1 << vf_shift));
 202         IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset), reg);
 203
 204         reg = IXGBE_READ_REG(hw, IXGBE_VFRE(reg_offset));
 205         reg |= (reg | (1 << vf_shift));
 206         IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset), reg);
 207
 208         ixgbe_vf_reset_event(adapter, vf);
 209 }
 210
 211 static int ixgbe_rcv_msg_from_vf(struct ixgbe_adapter *adapter, u32 vf)
 212 {
 213         u32 mbx_size = IXGBE_VFMAILBOX_SIZE;
 214         u32 msgbuf[mbx_size];
 215         struct ixgbe_hw *hw = &adapter->hw;
 216         s32 retval;
 217         int entries;
 218         u16 *hash_list;
 219         int add, vid;
 220
 221         retval = ixgbe_read_mbx(hw, msgbuf, mbx_size, vf);
 222
 223         if (retval)
 224                 printk(KERN_ERR "Error receiving message from VF\n");
 225
 226         /* this is a message we already processed, do nothing */
 227         if (msgbuf[0] & (IXGBE_VT_MSGTYPE_ACK | IXGBE_VT_MSGTYPE_NACK))
 228                 return retval;
 229
 230         /*
 231          * until the vf completes a virtual function reset it should not be
 232          * allowed to start any configuration.
 233          */
 234
 235         if (msgbuf[0] == IXGBE_VF_RESET) {
 236                 unsigned char *vf_mac = adapter->vfinfo[vf].vf_mac_addresses;
 237                 u8 *addr = (u8 *)(&msgbuf[1]);
 238                 DPRINTK(PROBE, INFO, "VF Reset msg received from vf %d\n", vf);
 239                 adapter->vfinfo[vf].clear_to_send = false;
 240                 ixgbe_vf_reset_msg(adapter, vf);
 241                 adapter->vfinfo[vf].clear_to_send = true;
 242
 243                 /* reply to reset with ack and vf mac address */
 244                 msgbuf[0] = IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_ACK;
 245                 memcpy(addr, vf_mac, IXGBE_ETH_LENGTH_OF_ADDRESS);
 246                 /*
 247                  * Piggyback the multicast filter type so VF can compute the
 248                  * correct vectors
 249                  */
 250                 msgbuf[3] = hw->mac.mc_filter_type;
 251                 ixgbe_write_mbx(hw, msgbuf, IXGBE_VF_PERMADDR_MSG_LEN, vf);
 252
 253                 return retval;
 254         }
 255
 256         if (!adapter->vfinfo[vf].clear_to_send) {
 257                 msgbuf[0] |= IXGBE_VT_MSGTYPE_NACK;
 258                 ixgbe_write_mbx(hw, msgbuf, 1, vf);
 259                 return retval;
 260         }
 261
 262         switch ((msgbuf[0] & 0xFFFF)) {
 263         case IXGBE_VF_SET_MAC_ADDR:
 264                 {
 265                         u8 *new_mac = ((u8 *)(&msgbuf[1]));
 266                         if (is_valid_ether_addr(new_mac))
 267                                 ixgbe_set_vf_mac(adapter, vf, new_mac);
 268                         else
 269                                 retval = -1;
 270                 }
 271                 break;
 272         case IXGBE_VF_SET_MULTICAST:
 273                 entries = (msgbuf[0] & IXGBE_VT_MSGINFO_MASK)
 274                           >> IXGBE_VT_MSGINFO_SHIFT;
 275                 hash_list = (u16 *)&msgbuf[1];
 276                 retval = ixgbe_set_vf_multicasts(adapter, entries,
 277                                                  hash_list, vf);
 278                 break;
 279         case IXGBE_VF_SET_LPE:
 280                 WARN_ON((msgbuf[0] & 0xFFFF) == IXGBE_VF_SET_LPE);
 281                 break;
 282         case IXGBE_VF_SET_VLAN:
 283                 add = (msgbuf[0] & IXGBE_VT_MSGINFO_MASK)
 284                       >> IXGBE_VT_MSGINFO_SHIFT;
 285                 vid = (msgbuf[1] & IXGBE_VLVF_VLANID_MASK);
 286                 retval = ixgbe_set_vf_vlan(adapter, add, vid, vf);
 287                 break;
 288         default:
 289                 DPRINTK(DRV, ERR, "Unhandled Msg %8.8x\n", msgbuf[0]);
 290                 retval = IXGBE_ERR_MBX;
 291                 break;
 292         }
 293
 294         /* notify the VF of the results of what it sent us */
 295         if (retval)
 296                 msgbuf[0] |= IXGBE_VT_MSGTYPE_NACK;
 297         else
 298                 msgbuf[0] |= IXGBE_VT_MSGTYPE_ACK;
 299
 300         msgbuf[0] |= IXGBE_VT_MSGTYPE_CTS;
 301
 302         ixgbe_write_mbx(hw, msgbuf, 1, vf);
 303
 304         return retval;
 305 }
 306
 307 static void ixgbe_rcv_ack_from_vf(struct ixgbe_adapter *adapter, u32 vf)
 308 {
 309         struct ixgbe_hw *hw = &adapter->hw;
 310         u32 msg = IXGBE_VT_MSGTYPE_NACK;
 311
 312         /* if device isn't clear to send it shouldn't be reading either */
 313         if (!adapter->vfinfo[vf].clear_to_send)
 314                 ixgbe_write_mbx(hw, &msg, 1, vf);
 315 }
 316
 317 void ixgbe_msg_task(struct ixgbe_adapter *adapter)
 318 {
 319         struct ixgbe_hw *hw = &adapter->hw;
 320         u32 vf;
 321
 322         for (vf = 0; vf < adapter->num_vfs; vf++) {
 323                 /* process any reset requests */
 324                 if (!ixgbe_check_for_rst(hw, vf))
 325                         ixgbe_vf_reset_event(adapter, vf);
 326
 327                 /* process any messages pending */
 328                 if (!ixgbe_check_for_msg(hw, vf))
 329                         ixgbe_rcv_msg_from_vf(adapter, vf);
 330
 331                 /* process any acks */
 332                 if (!ixgbe_check_for_ack(hw, vf))
 333                         ixgbe_rcv_ack_from_vf(adapter, vf);
 334         }
 335 }
 336
 337 void ixgbe_disable_tx_rx(struct ixgbe_adapter *adapter)
 338 {
 339         struct ixgbe_hw *hw = &adapter->hw;
 340
 341         /* disable transmit and receive for all vfs */
 342         IXGBE_WRITE_REG(hw, IXGBE_VFTE(0), 0);
 343         IXGBE_WRITE_REG(hw, IXGBE_VFTE(1), 0);
 344
 345         IXGBE_WRITE_REG(hw, IXGBE_VFRE(0), 0);
 346         IXGBE_WRITE_REG(hw, IXGBE_VFRE(1), 0);
 347 }
 348
 349 void ixgbe_ping_all_vfs(struct ixgbe_adapter *adapter)
 350 {
 351         struct ixgbe_hw *hw = &adapter->hw;
 352         u32 ping;
 353         int i;
 354
 355         for (i = 0 ; i < adapter->num_vfs; i++) {
 356                 ping = IXGBE_PF_CONTROL_MSG;
 357                 if (adapter->vfinfo[i].clear_to_send)
 358                         ping |= IXGBE_VT_MSGTYPE_CTS;
 359                 ixgbe_write_mbx(hw, &ping, 1, i);
 360         }
 361 }
 362