drivers/net/ixgbevf/vf.c

   1 /*******************************************************************************
   2
   3   Intel 82599 Virtual Function 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 #include "vf.h"
  29
  30 /**
  31  *  ixgbevf_start_hw_vf - Prepare hardware for Tx/Rx
  32  *  @hw: pointer to hardware structure
  33  *
  34  *  Starts the hardware by filling the bus info structure and media type, clears
  35  *  all on chip counters, initializes receive address registers, multicast
  36  *  table, VLAN filter table, calls routine to set up link and flow control
  37  *  settings, and leaves transmit and receive units disabled and uninitialized
  38  **/
  39 static s32 ixgbevf_start_hw_vf(struct ixgbe_hw *hw)
  40 {
  41         /* Clear adapter stopped flag */
  42         hw->adapter_stopped = false;
  43
  44         return 0;
  45 }
  46
  47 /**
  48  *  ixgbevf_init_hw_vf - virtual function hardware initialization
  49  *  @hw: pointer to hardware structure
  50  *
  51  *  Initialize the hardware by resetting the hardware and then starting
  52  *  the hardware
  53  **/
  54 static s32 ixgbevf_init_hw_vf(struct ixgbe_hw *hw)
  55 {
  56         s32 status = hw->mac.ops.start_hw(hw);
  57
  58         hw->mac.ops.get_mac_addr(hw, hw->mac.addr);
  59
  60         return status;
  61 }
  62
  63 /**
  64  *  ixgbevf_reset_hw_vf - Performs hardware reset
  65  *  @hw: pointer to hardware structure
  66  *
  67  *  Resets the hardware by reseting the transmit and receive units, masks and
  68  *  clears all interrupts.
  69  **/
  70 static s32 ixgbevf_reset_hw_vf(struct ixgbe_hw *hw)
  71 {
  72         struct ixgbe_mbx_info *mbx = &hw->mbx;
  73         u32 timeout = IXGBE_VF_INIT_TIMEOUT;
  74         s32 ret_val = IXGBE_ERR_INVALID_MAC_ADDR;
  75         u32 msgbuf[IXGBE_VF_PERMADDR_MSG_LEN];
  76         u8 *addr = (u8 *)(&msgbuf[1]);
  77
  78         /* Call adapter stop to disable tx/rx and clear interrupts */
  79         hw->mac.ops.stop_adapter(hw);
  80
  81         IXGBE_WRITE_REG(hw, IXGBE_VFCTRL, IXGBE_CTRL_RST);
  82         IXGBE_WRITE_FLUSH(hw);
  83
  84         /* we cannot reset while the RSTI / RSTD bits are asserted */
  85         while (!mbx->ops.check_for_rst(hw) && timeout) {
  86                 timeout--;
  87                 udelay(5);
  88         }
  89
  90         if (!timeout)
  91                 return IXGBE_ERR_RESET_FAILED;
  92
  93         /* mailbox timeout can now become active */
  94         mbx->timeout = IXGBE_VF_MBX_INIT_TIMEOUT;
  95
  96         msgbuf[0] = IXGBE_VF_RESET;
  97         mbx->ops.write_posted(hw, msgbuf, 1);
  98
  99         msleep(10);
 100
 101         /* set our "perm_addr" based on info provided by PF */
 102         /* also set up the mc_filter_type which is piggy backed
 103          * on the mac address in word 3 */
 104         ret_val = mbx->ops.read_posted(hw, msgbuf, IXGBE_VF_PERMADDR_MSG_LEN);
 105         if (ret_val)
 106                 return ret_val;
 107
 108         if (msgbuf[0] != (IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_ACK))
 109                 return IXGBE_ERR_INVALID_MAC_ADDR;
 110
 111         memcpy(hw->mac.perm_addr, addr, IXGBE_ETH_LENGTH_OF_ADDRESS);
 112         hw->mac.mc_filter_type = msgbuf[IXGBE_VF_MC_TYPE_WORD];
 113
 114         return 0;
 115 }
 116
 117 /**
 118  *  ixgbevf_stop_hw_vf - Generic stop Tx/Rx units
 119  *  @hw: pointer to hardware structure
 120  *
 121  *  Sets the adapter_stopped flag within ixgbe_hw struct. Clears interrupts,
 122  *  disables transmit and receive units. The adapter_stopped flag is used by
 123  *  the shared code and drivers to determine if the adapter is in a stopped
 124  *  state and should not touch the hardware.
 125  **/
 126 static s32 ixgbevf_stop_hw_vf(struct ixgbe_hw *hw)
 127 {
 128         u32 number_of_queues;
 129         u32 reg_val;
 130         u16 i;
 131
 132         /*
 133          * Set the adapter_stopped flag so other driver functions stop touching
 134          * the hardware
 135          */
 136         hw->adapter_stopped = true;
 137
 138         /* Disable the receive unit by stopped each queue */
 139         number_of_queues = hw->mac.max_rx_queues;
 140         for (i = 0; i < number_of_queues; i++) {
 141                 reg_val = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(i));
 142                 if (reg_val & IXGBE_RXDCTL_ENABLE) {
 143                         reg_val &= ~IXGBE_RXDCTL_ENABLE;
 144                         IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(i), reg_val);
 145                 }
 146         }
 147
 148         IXGBE_WRITE_FLUSH(hw);
 149
 150         /* Clear interrupt mask to stop from interrupts being generated */
 151         IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, IXGBE_VF_IRQ_CLEAR_MASK);
 152
 153         /* Clear any pending interrupts */
 154         IXGBE_READ_REG(hw, IXGBE_VTEICR);
 155
 156         /* Disable the transmit unit.  Each queue must be disabled. */
 157         number_of_queues = hw->mac.max_tx_queues;
 158         for (i = 0; i < number_of_queues; i++) {
 159                 reg_val = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(i));
 160                 if (reg_val & IXGBE_TXDCTL_ENABLE) {
 161                         reg_val &= ~IXGBE_TXDCTL_ENABLE;
 162                         IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(i), reg_val);
 163                 }
 164         }
 165
 166         return 0;
 167 }
 168
 169 /**
 170  *  ixgbevf_mta_vector - Determines bit-vector in multicast table to set
 171  *  @hw: pointer to hardware structure
 172  *  @mc_addr: the multicast address
 173  *
 174  *  Extracts the 12 bits, from a multicast address, to determine which
 175  *  bit-vector to set in the multicast table. The hardware uses 12 bits, from
 176  *  incoming rx multicast addresses, to determine the bit-vector to check in
 177  *  the MTA. Which of the 4 combination, of 12-bits, the hardware uses is set
 178  *  by the MO field of the MCSTCTRL. The MO field is set during initialization
 179  *  to mc_filter_type.
 180  **/
 181 static s32 ixgbevf_mta_vector(struct ixgbe_hw *hw, u8 *mc_addr)
 182 {
 183         u32 vector = 0;
 184
 185         switch (hw->mac.mc_filter_type) {
 186         case 0:   /* use bits [47:36] of the address */
 187                 vector = ((mc_addr[4] >> 4) | (((u16)mc_addr[5]) << 4));
 188                 break;
 189         case 1:   /* use bits [46:35] of the address */
 190                 vector = ((mc_addr[4] >> 3) | (((u16)mc_addr[5]) << 5));
 191                 break;
 192         case 2:   /* use bits [45:34] of the address */
 193                 vector = ((mc_addr[4] >> 2) | (((u16)mc_addr[5]) << 6));
 194                 break;
 195         case 3:   /* use bits [43:32] of the address */
 196                 vector = ((mc_addr[4]) | (((u16)mc_addr[5]) << 8));
 197                 break;
 198         default:  /* Invalid mc_filter_type */
 199                 break;
 200         }
 201
 202         /* vector can only be 12-bits or boundary will be exceeded */
 203         vector &= 0xFFF;
 204         return vector;
 205 }
 206
 207 /**
 208  *  ixgbevf_get_mac_addr_vf - Read device MAC address
 209  *  @hw: pointer to the HW structure
 210  *  @mac_addr: pointer to storage for retrieved MAC address
 211  **/
 212 static s32 ixgbevf_get_mac_addr_vf(struct ixgbe_hw *hw, u8 *mac_addr)
 213 {
 214         memcpy(mac_addr, hw->mac.perm_addr, IXGBE_ETH_LENGTH_OF_ADDRESS);
 215
 216         return 0;
 217 }
 218
 219 /**
 220  *  ixgbevf_set_rar_vf - set device MAC address
 221  *  @hw: pointer to hardware structure
 222  *  @index: Receive address register to write
 223  *  @addr: Address to put into receive address register
 224  *  @vmdq: Unused in this implementation
 225  **/
 226 static s32 ixgbevf_set_rar_vf(struct ixgbe_hw *hw, u32 index, u8 *addr,
 227                               u32 vmdq)
 228 {
 229         struct ixgbe_mbx_info *mbx = &hw->mbx;
 230         u32 msgbuf[3];
 231         u8 *msg_addr = (u8 *)(&msgbuf[1]);
 232         s32 ret_val;
 233
 234         memset(msgbuf, 0, sizeof(msgbuf));
 235         msgbuf[0] = IXGBE_VF_SET_MAC_ADDR;
 236         memcpy(msg_addr, addr, 6);
 237         ret_val = mbx->ops.write_posted(hw, msgbuf, 3);
 238
 239         if (!ret_val)
 240                 ret_val = mbx->ops.read_posted(hw, msgbuf, 3);
 241
 242         msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
 243
 244         /* if nacked the address was rejected, use "perm_addr" */
 245         if (!ret_val &&
 246             (msgbuf[0] == (IXGBE_VF_SET_MAC_ADDR | IXGBE_VT_MSGTYPE_NACK)))
 247                 ixgbevf_get_mac_addr_vf(hw, hw->mac.addr);
 248
 249         return ret_val;
 250 }
 251
 252 /**
 253  *  ixgbevf_update_mc_addr_list_vf - Update Multicast addresses
 254  *  @hw: pointer to the HW structure
 255  *  @netdev: pointer to net device structure
 256  *
 257  *  Updates the Multicast Table Array.
 258  **/
 259 static s32 ixgbevf_update_mc_addr_list_vf(struct ixgbe_hw *hw,
 260                                           struct net_device *netdev)
 261 {
 262         struct netdev_hw_addr *ha;
 263         struct ixgbe_mbx_info *mbx = &hw->mbx;
 264         u32 msgbuf[IXGBE_VFMAILBOX_SIZE];
 265         u16 *vector_list = (u16 *)&msgbuf[1];
 266         u32 cnt, i;
 267
 268         /* Each entry in the list uses 1 16 bit word.  We have 30
 269          * 16 bit words available in our HW msg buffer (minus 1 for the
 270          * msg type).  That's 30 hash values if we pack 'em right.  If
 271          * there are more than 30 MC addresses to add then punt the
 272          * extras for now and then add code to handle more than 30 later.
 273          * It would be unusual for a server to request that many multi-cast
 274          * addresses except for in large enterprise network environments.
 275          */
 276
 277         cnt = netdev_mc_count(netdev);
 278         if (cnt > 30)
 279                 cnt = 30;
 280         msgbuf[0] = IXGBE_VF_SET_MULTICAST;
 281         msgbuf[0] |= cnt << IXGBE_VT_MSGINFO_SHIFT;
 282
 283         i = 0;
 284         netdev_for_each_mc_addr(ha, netdev) {
 285                 if (i == cnt)
 286                         break;
 287                 vector_list[i++] = ixgbevf_mta_vector(hw, ha->addr);
 288         }
 289
 290         mbx->ops.write_posted(hw, msgbuf, IXGBE_VFMAILBOX_SIZE);
 291
 292         return 0;
 293 }
 294
 295 /**
 296  *  ixgbevf_set_vfta_vf - Set/Unset vlan filter table address
 297  *  @hw: pointer to the HW structure
 298  *  @vlan: 12 bit VLAN ID
 299  *  @vind: unused by VF drivers
 300  *  @vlan_on: if true then set bit, else clear bit
 301  **/
 302 static s32 ixgbevf_set_vfta_vf(struct ixgbe_hw *hw, u32 vlan, u32 vind,
 303                                bool vlan_on)
 304 {
 305         struct ixgbe_mbx_info *mbx = &hw->mbx;
 306         u32 msgbuf[2];
 307
 308         msgbuf[0] = IXGBE_VF_SET_VLAN;
 309         msgbuf[1] = vlan;
 310         /* Setting the 8 bit field MSG INFO to TRUE indicates "add" */
 311         msgbuf[0] |= vlan_on << IXGBE_VT_MSGINFO_SHIFT;
 312
 313         return mbx->ops.write_posted(hw, msgbuf, 2);
 314 }
 315
 316 /**
 317  *  ixgbevf_setup_mac_link_vf - Setup MAC link settings
 318  *  @hw: pointer to hardware structure
 319  *  @speed: Unused in this implementation
 320  *  @autoneg: Unused in this implementation
 321  *  @autoneg_wait_to_complete: Unused in this implementation
 322  *
 323  *  Do nothing and return success.  VF drivers are not allowed to change
 324  *  global settings.  Maintained for driver compatibility.
 325  **/
 326 static s32 ixgbevf_setup_mac_link_vf(struct ixgbe_hw *hw,
 327                                      ixgbe_link_speed speed, bool autoneg,
 328                                      bool autoneg_wait_to_complete)
 329 {
 330         return 0;
 331 }
 332
 333 /**
 334  *  ixgbevf_check_mac_link_vf - Get link/speed status
 335  *  @hw: pointer to hardware structure
 336  *  @speed: pointer to link speed
 337  *  @link_up: true is link is up, false otherwise
 338  *  @autoneg_wait_to_complete: true when waiting for completion is needed
 339  *
 340  *  Reads the links register to determine if link is up and the current speed
 341  **/
 342 static s32 ixgbevf_check_mac_link_vf(struct ixgbe_hw *hw,
 343                                      ixgbe_link_speed *speed,
 344                                      bool *link_up,
 345                                      bool autoneg_wait_to_complete)
 346 {
 347         u32 links_reg;
 348
 349         if (!(hw->mbx.ops.check_for_rst(hw))) {
 350                 *link_up = false;
 351                 *speed = 0;
 352                 return -1;
 353         }
 354
 355         links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS);
 356
 357         if (links_reg & IXGBE_LINKS_UP)
 358                 *link_up = true;
 359         else
 360                 *link_up = false;
 361
 362         if ((links_reg & IXGBE_LINKS_SPEED_82599) ==
 363             IXGBE_LINKS_SPEED_10G_82599)
 364                 *speed = IXGBE_LINK_SPEED_10GB_FULL;
 365         else
 366                 *speed = IXGBE_LINK_SPEED_1GB_FULL;
 367
 368         return 0;
 369 }
 370
 371 static struct ixgbe_mac_operations ixgbevf_mac_ops = {
 372         .init_hw             = ixgbevf_init_hw_vf,
 373         .reset_hw            = ixgbevf_reset_hw_vf,
 374         .start_hw            = ixgbevf_start_hw_vf,
 375         .get_mac_addr        = ixgbevf_get_mac_addr_vf,
 376         .stop_adapter        = ixgbevf_stop_hw_vf,
 377         .setup_link          = ixgbevf_setup_mac_link_vf,
 378         .check_link          = ixgbevf_check_mac_link_vf,
 379         .set_rar             = ixgbevf_set_rar_vf,
 380         .update_mc_addr_list = ixgbevf_update_mc_addr_list_vf,
 381         .set_vfta            = ixgbevf_set_vfta_vf,
 382 };
 383
 384 struct ixgbevf_info ixgbevf_vf_info = {
 385         .mac = ixgbe_mac_82599_vf,
 386         .mac_ops = &ixgbevf_mac_ops,
 387 };
 388