FreeBSD/Linux Kernel Cross Reference
sys/dev/e1000/e1000_vf.c

     /******************************************************************************
     
       Copyright (c) 2001-2014, Intel Corporation 
       All rights reserved.
       
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    ******************************************************************************/
    /*$FreeBSD$*/
    
    
    #include "e1000_api.h"
    
    
    static s32 e1000_init_phy_params_vf(struct e1000_hw *hw);
    static s32 e1000_init_nvm_params_vf(struct e1000_hw *hw);
    static void e1000_release_vf(struct e1000_hw *hw);
    static s32 e1000_acquire_vf(struct e1000_hw *hw);
    static s32 e1000_setup_link_vf(struct e1000_hw *hw);
    static s32 e1000_get_bus_info_pcie_vf(struct e1000_hw *hw);
    static s32 e1000_init_mac_params_vf(struct e1000_hw *hw);
    static s32 e1000_check_for_link_vf(struct e1000_hw *hw);
    static s32 e1000_get_link_up_info_vf(struct e1000_hw *hw, u16 *speed,
                                         u16 *duplex);
    static s32 e1000_init_hw_vf(struct e1000_hw *hw);
    static s32 e1000_reset_hw_vf(struct e1000_hw *hw);
    static void e1000_update_mc_addr_list_vf(struct e1000_hw *hw, u8 *, u32);
    static int  e1000_rar_set_vf(struct e1000_hw *, u8 *, u32);
    static s32 e1000_read_mac_addr_vf(struct e1000_hw *);
    
    /**
     *  e1000_init_phy_params_vf - Inits PHY params
     *  @hw: pointer to the HW structure
     *
     *  Doesn't do much - there's no PHY available to the VF.
     **/
    static s32 e1000_init_phy_params_vf(struct e1000_hw *hw)
    {
            DEBUGFUNC("e1000_init_phy_params_vf");
            hw->phy.type = e1000_phy_vf;
            hw->phy.ops.acquire = e1000_acquire_vf;
            hw->phy.ops.release = e1000_release_vf;
    
            return E1000_SUCCESS;
    }
    
    /**
     *  e1000_init_nvm_params_vf - Inits NVM params
     *  @hw: pointer to the HW structure
     *
     *  Doesn't do much - there's no NVM available to the VF.
     **/
    static s32 e1000_init_nvm_params_vf(struct e1000_hw *hw)
    {
            DEBUGFUNC("e1000_init_nvm_params_vf");
            hw->nvm.type = e1000_nvm_none;
            hw->nvm.ops.acquire = e1000_acquire_vf;
            hw->nvm.ops.release = e1000_release_vf;
    
            return E1000_SUCCESS;
    }
    
    /**
     *  e1000_init_mac_params_vf - Inits MAC params
     *  @hw: pointer to the HW structure
     **/
    static s32 e1000_init_mac_params_vf(struct e1000_hw *hw)
    {
            struct e1000_mac_info *mac = &hw->mac;
    
            DEBUGFUNC("e1000_init_mac_params_vf");
    
            /* Set media type */
            /*
             * Virtual functions don't care what they're media type is as they
            * have no direct access to the PHY, or the media.  That is handled
            * by the physical function driver.
            */
           hw->phy.media_type = e1000_media_type_unknown;
   
           /* No ASF features for the VF driver */
           mac->asf_firmware_present = FALSE;
           /* ARC subsystem not supported */
           mac->arc_subsystem_valid = FALSE;
           /* Disable adaptive IFS mode so the generic funcs don't do anything */
           mac->adaptive_ifs = FALSE;
           /* VF's have no MTA Registers - PF feature only */
           mac->mta_reg_count = 128;
           /* VF's have no access to RAR entries  */
           mac->rar_entry_count = 1;
   
           /* Function pointers */
           /* link setup */
           mac->ops.setup_link = e1000_setup_link_vf;
           /* bus type/speed/width */
           mac->ops.get_bus_info = e1000_get_bus_info_pcie_vf;
           /* reset */
           mac->ops.reset_hw = e1000_reset_hw_vf;
           /* hw initialization */
           mac->ops.init_hw = e1000_init_hw_vf;
           /* check for link */
           mac->ops.check_for_link = e1000_check_for_link_vf;
           /* link info */
           mac->ops.get_link_up_info = e1000_get_link_up_info_vf;
           /* multicast address update */
           mac->ops.update_mc_addr_list = e1000_update_mc_addr_list_vf;
           /* set mac address */
           mac->ops.rar_set = e1000_rar_set_vf;
           /* read mac address */
           mac->ops.read_mac_addr = e1000_read_mac_addr_vf;
   
   
           return E1000_SUCCESS;
   }
   
   /**
    *  e1000_init_function_pointers_vf - Inits function pointers
    *  @hw: pointer to the HW structure
    **/
   void e1000_init_function_pointers_vf(struct e1000_hw *hw)
   {
           DEBUGFUNC("e1000_init_function_pointers_vf");
   
           hw->mac.ops.init_params = e1000_init_mac_params_vf;
           hw->nvm.ops.init_params = e1000_init_nvm_params_vf;
           hw->phy.ops.init_params = e1000_init_phy_params_vf;
           hw->mbx.ops.init_params = e1000_init_mbx_params_vf;
   }
   
   /**
    *  e1000_acquire_vf - Acquire rights to access PHY or NVM.
    *  @hw: pointer to the HW structure
    *
    *  There is no PHY or NVM so we want all attempts to acquire these to fail.
    *  In addition, the MAC registers to access PHY/NVM don't exist so we don't
    *  even want any SW to attempt to use them.
    **/
   static s32 e1000_acquire_vf(struct e1000_hw E1000_UNUSEDARG *hw)
   {
           return -E1000_ERR_PHY;
   }
   
   /**
    *  e1000_release_vf - Release PHY or NVM
    *  @hw: pointer to the HW structure
    *
    *  There is no PHY or NVM so we want all attempts to acquire these to fail.
    *  In addition, the MAC registers to access PHY/NVM don't exist so we don't
    *  even want any SW to attempt to use them.
    **/
   static void e1000_release_vf(struct e1000_hw E1000_UNUSEDARG *hw)
   {
           return;
   }
   
   /**
    *  e1000_setup_link_vf - Sets up link.
    *  @hw: pointer to the HW structure
    *
    *  Virtual functions cannot change link.
    **/
   static s32 e1000_setup_link_vf(struct e1000_hw E1000_UNUSEDARG *hw)
   {
           DEBUGFUNC("e1000_setup_link_vf");
   
           return E1000_SUCCESS;
   }
   
   /**
    *  e1000_get_bus_info_pcie_vf - Gets the bus info.
    *  @hw: pointer to the HW structure
    *
    *  Virtual functions are not really on their own bus.
    **/
   static s32 e1000_get_bus_info_pcie_vf(struct e1000_hw *hw)
   {
           struct e1000_bus_info *bus = &hw->bus;
   
           DEBUGFUNC("e1000_get_bus_info_pcie_vf");
   
           /* Do not set type PCI-E because we don't want disable master to run */
           bus->type = e1000_bus_type_reserved;
           bus->speed = e1000_bus_speed_2500;
   
           return 0;
   }
   
   /**
    *  e1000_get_link_up_info_vf - Gets link info.
    *  @hw: pointer to the HW structure
    *  @speed: pointer to 16 bit value to store link speed.
    *  @duplex: pointer to 16 bit value to store duplex.
    *
    *  Since we cannot read the PHY and get accurate link info, we must rely upon
    *  the status register's data which is often stale and inaccurate.
    **/
   static s32 e1000_get_link_up_info_vf(struct e1000_hw *hw, u16 *speed,
                                        u16 *duplex)
   {
           s32 status;
   
           DEBUGFUNC("e1000_get_link_up_info_vf");
   
           status = E1000_READ_REG(hw, E1000_STATUS);
           if (status & E1000_STATUS_SPEED_1000) {
                   *speed = SPEED_1000;
                   DEBUGOUT("1000 Mbs, ");
           } else if (status & E1000_STATUS_SPEED_100) {
                   *speed = SPEED_100;
                   DEBUGOUT("100 Mbs, ");
           } else {
                   *speed = SPEED_10;
                   DEBUGOUT("10 Mbs, ");
           }
   
           if (status & E1000_STATUS_FD) {
                   *duplex = FULL_DUPLEX;
                   DEBUGOUT("Full Duplex\n");
           } else {
                   *duplex = HALF_DUPLEX;
                   DEBUGOUT("Half Duplex\n");
           }
   
           return E1000_SUCCESS;
   }
   
   /**
    *  e1000_reset_hw_vf - Resets the HW
    *  @hw: pointer to the HW structure
    *
    *  VF's provide a function level reset. This is done using bit 26 of ctrl_reg.
    *  This is all the reset we can perform on a VF.
    **/
   static s32 e1000_reset_hw_vf(struct e1000_hw *hw)
   {
           struct e1000_mbx_info *mbx = &hw->mbx;
           u32 timeout = E1000_VF_INIT_TIMEOUT;
           s32 ret_val = -E1000_ERR_MAC_INIT;
           u32 ctrl, msgbuf[3];
           u8 *addr = (u8 *)(&msgbuf[1]);
   
           DEBUGFUNC("e1000_reset_hw_vf");
   
           DEBUGOUT("Issuing a function level reset to MAC\n");
           ctrl = E1000_READ_REG(hw, E1000_CTRL);
           E1000_WRITE_REG(hw, E1000_CTRL, ctrl | E1000_CTRL_RST);
   
           /* we cannot reset while the RSTI / RSTD bits are asserted */
           while (!mbx->ops.check_for_rst(hw, 0) && timeout) {
                   timeout--;
                   usec_delay(5);
           }
   
           if (timeout) {
                   /* mailbox timeout can now become active */
                   mbx->timeout = E1000_VF_MBX_INIT_TIMEOUT;
   
                   msgbuf[0] = E1000_VF_RESET;
                   mbx->ops.write_posted(hw, msgbuf, 1, 0);
   
                   msec_delay(10);
   
                   /* set our "perm_addr" based on info provided by PF */
                   ret_val = mbx->ops.read_posted(hw, msgbuf, 3, 0);
                   if (!ret_val) {
                           if (msgbuf[0] == (E1000_VF_RESET |
                               E1000_VT_MSGTYPE_ACK))
                                   memcpy(hw->mac.perm_addr, addr, 6);
                           else
                                   ret_val = -E1000_ERR_MAC_INIT;
                   }
           }
   
           return ret_val;
   }
   
   /**
    *  e1000_init_hw_vf - Inits the HW
    *  @hw: pointer to the HW structure
    *
    *  Not much to do here except clear the PF Reset indication if there is one.
    **/
   static s32 e1000_init_hw_vf(struct e1000_hw *hw)
   {
           DEBUGFUNC("e1000_init_hw_vf");
   
           /* attempt to set and restore our mac address */
           e1000_rar_set_vf(hw, hw->mac.addr, 0);
   
           return E1000_SUCCESS;
   }
   
   /**
    *  e1000_rar_set_vf - set device MAC address
    *  @hw: pointer to the HW structure
    *  @addr: pointer to the receive address
    *  @index receive address array register
    **/
   static int e1000_rar_set_vf(struct e1000_hw *hw, u8 *addr,
                                u32 E1000_UNUSEDARG index)
   {
           struct e1000_mbx_info *mbx = &hw->mbx;
           u32 msgbuf[3];
           u8 *msg_addr = (u8 *)(&msgbuf[1]);
           s32 ret_val;
   
           memset(msgbuf, 0, 12);
           msgbuf[0] = E1000_VF_SET_MAC_ADDR;
           memcpy(msg_addr, addr, 6);
           ret_val = mbx->ops.write_posted(hw, msgbuf, 3, 0);
   
           if (!ret_val)
                   ret_val = mbx->ops.read_posted(hw, msgbuf, 3, 0);
   
           msgbuf[0] &= ~E1000_VT_MSGTYPE_CTS;
   
           /* if nacked the address was rejected, use "perm_addr" */
           if (!ret_val &&
               (msgbuf[0] == (E1000_VF_SET_MAC_ADDR | E1000_VT_MSGTYPE_NACK)))
                   e1000_read_mac_addr_vf(hw);
   
           return E1000_SUCCESS;
   }
   
   /**
    *  e1000_hash_mc_addr_vf - Generate a multicast hash value
    *  @hw: pointer to the HW structure
    *  @mc_addr: pointer to a multicast address
    *
    *  Generates a multicast address hash value which is used to determine
    *  the multicast filter table array address and new table value.
    **/
   static u32 e1000_hash_mc_addr_vf(struct e1000_hw *hw, u8 *mc_addr)
   {
           u32 hash_value, hash_mask;
           u8 bit_shift = 0;
   
           DEBUGFUNC("e1000_hash_mc_addr_generic");
   
           /* Register count multiplied by bits per register */
           hash_mask = (hw->mac.mta_reg_count * 32) - 1;
   
           /*
            * The bit_shift is the number of left-shifts
            * where 0xFF would still fall within the hash mask.
            */
           while (hash_mask >> bit_shift != 0xFF)
                   bit_shift++;
   
           hash_value = hash_mask & (((mc_addr[4] >> (8 - bit_shift)) |
                                     (((u16) mc_addr[5]) << bit_shift)));
   
           return hash_value;
   }
   
   static void e1000_write_msg_read_ack(struct e1000_hw *hw,
                                        u32 *msg, u16 size)
   {
           struct e1000_mbx_info *mbx = &hw->mbx;
           u32 retmsg[E1000_VFMAILBOX_SIZE];
           s32 retval = mbx->ops.write_posted(hw, msg, size, 0);
   
           if (!retval)
                   mbx->ops.read_posted(hw, retmsg, E1000_VFMAILBOX_SIZE, 0);
   }
   
   /**
    *  e1000_update_mc_addr_list_vf - Update Multicast addresses
    *  @hw: pointer to the HW structure
    *  @mc_addr_list: array of multicast addresses to program
    *  @mc_addr_count: number of multicast addresses to program
    *
    *  Updates the Multicast Table Array.
    *  The caller must have a packed mc_addr_list of multicast addresses.
    **/
   void e1000_update_mc_addr_list_vf(struct e1000_hw *hw,
                                     u8 *mc_addr_list, u32 mc_addr_count)
   {
           u32 msgbuf[E1000_VFMAILBOX_SIZE];
           u16 *hash_list = (u16 *)&msgbuf[1];
           u32 hash_value;
           u32 i;
   
           DEBUGFUNC("e1000_update_mc_addr_list_vf");
   
           /* Each entry in the list uses 1 16 bit word.  We have 30
            * 16 bit words available in our HW msg buffer (minus 1 for the
            * msg type).  That's 30 hash values if we pack 'em right.  If
            * there are more than 30 MC addresses to add then punt the
            * extras for now and then add code to handle more than 30 later.
            * It would be unusual for a server to request that many multi-cast
            * addresses except for in large enterprise network environments.
            */
   
           DEBUGOUT1("MC Addr Count = %d\n", mc_addr_count);
   
           if (mc_addr_count > 30) {
                   msgbuf[0] |= E1000_VF_SET_MULTICAST_OVERFLOW;
                   mc_addr_count = 30;
           }
   
           msgbuf[0] = E1000_VF_SET_MULTICAST;
           msgbuf[0] |= mc_addr_count << E1000_VT_MSGINFO_SHIFT;
   
           for (i = 0; i < mc_addr_count; i++) {
                   hash_value = e1000_hash_mc_addr_vf(hw, mc_addr_list);
                   DEBUGOUT1("Hash value = 0x%03X\n", hash_value);
                   hash_list[i] = hash_value & 0x0FFF;
                   mc_addr_list += ETH_ADDR_LEN;
           }
   
           e1000_write_msg_read_ack(hw, msgbuf, E1000_VFMAILBOX_SIZE);
   }
   
   /**
    *  e1000_vfta_set_vf - Set/Unset vlan filter table address
    *  @hw: pointer to the HW structure
    *  @vid: determines the vfta register and bit to set/unset
    *  @set: if TRUE then set bit, else clear bit
    **/
   void e1000_vfta_set_vf(struct e1000_hw *hw, u16 vid, bool set)
   {
           u32 msgbuf[2];
   
           msgbuf[0] = E1000_VF_SET_VLAN;
           msgbuf[1] = vid;
           /* Setting the 8 bit field MSG INFO to TRUE indicates "add" */
           if (set)
                   msgbuf[0] |= E1000_VF_SET_VLAN_ADD;
   
           e1000_write_msg_read_ack(hw, msgbuf, 2);
   }
   
   /** e1000_rlpml_set_vf - Set the maximum receive packet length
    *  @hw: pointer to the HW structure
    *  @max_size: value to assign to max frame size
    **/
   void e1000_rlpml_set_vf(struct e1000_hw *hw, u16 max_size)
   {
           u32 msgbuf[2];
   
           msgbuf[0] = E1000_VF_SET_LPE;
           msgbuf[1] = max_size;
   
           e1000_write_msg_read_ack(hw, msgbuf, 2);
   }
   
   /**
    *  e1000_promisc_set_vf - Set flags for Unicast or Multicast promisc
    *  @hw: pointer to the HW structure
    *  @uni: boolean indicating unicast promisc status
    *  @multi: boolean indicating multicast promisc status
    **/
   s32 e1000_promisc_set_vf(struct e1000_hw *hw, enum e1000_promisc_type type)
   {
           struct e1000_mbx_info *mbx = &hw->mbx;
           u32 msgbuf = E1000_VF_SET_PROMISC;
           s32 ret_val;
   
           switch (type) {
           case e1000_promisc_multicast:
                   msgbuf |= E1000_VF_SET_PROMISC_MULTICAST;
                   break;
           case e1000_promisc_enabled:
                   msgbuf |= E1000_VF_SET_PROMISC_MULTICAST;
           case e1000_promisc_unicast:
                   msgbuf |= E1000_VF_SET_PROMISC_UNICAST;
           case e1000_promisc_disabled:
                   break;
           default:
                   return -E1000_ERR_MAC_INIT;
           }
   
            ret_val = mbx->ops.write_posted(hw, &msgbuf, 1, 0);
   
           if (!ret_val)
                   ret_val = mbx->ops.read_posted(hw, &msgbuf, 1, 0);
   
           if (!ret_val && !(msgbuf & E1000_VT_MSGTYPE_ACK))
                   ret_val = -E1000_ERR_MAC_INIT;
   
           return ret_val;
   }
   
   /**
    *  e1000_read_mac_addr_vf - Read device MAC address
    *  @hw: pointer to the HW structure
    **/
   static s32 e1000_read_mac_addr_vf(struct e1000_hw *hw)
   {
           int i;
   
           for (i = 0; i < ETH_ADDR_LEN; i++)
                   hw->mac.addr[i] = hw->mac.perm_addr[i];
   
           return E1000_SUCCESS;
   }
   
   /**
    *  e1000_check_for_link_vf - Check for link for a virtual interface
    *  @hw: pointer to the HW structure
    *
    *  Checks to see if the underlying PF is still talking to the VF and
    *  if it is then it reports the link state to the hardware, otherwise
    *  it reports link down and returns an error.
    **/
   static s32 e1000_check_for_link_vf(struct e1000_hw *hw)
   {
           struct e1000_mbx_info *mbx = &hw->mbx;
           struct e1000_mac_info *mac = &hw->mac;
           s32 ret_val = E1000_SUCCESS;
           u32 in_msg = 0;
   
           DEBUGFUNC("e1000_check_for_link_vf");
   
           /*
            * We only want to run this if there has been a rst asserted.
            * in this case that could mean a link change, device reset,
            * or a virtual function reset
            */
   
           /* If we were hit with a reset or timeout drop the link */
           if (!mbx->ops.check_for_rst(hw, 0) || !mbx->timeout)
                   mac->get_link_status = TRUE;
   
           if (!mac->get_link_status)
                   goto out;
   
           /* if link status is down no point in checking to see if pf is up */
           if (!(E1000_READ_REG(hw, E1000_STATUS) & E1000_STATUS_LU))
                   goto out;
   
           /* if the read failed it could just be a mailbox collision, best wait
            * until we are called again and don't report an error */
           if (mbx->ops.read(hw, &in_msg, 1, 0))
                   goto out;
   
           /* if incoming message isn't clear to send we are waiting on response */
           if (!(in_msg & E1000_VT_MSGTYPE_CTS)) {
                   /* message is not CTS and is NACK we have lost CTS status */
                   if (in_msg & E1000_VT_MSGTYPE_NACK)
                           ret_val = -E1000_ERR_MAC_INIT;
                   goto out;
           }
   
           /* at this point we know the PF is talking to us, check and see if
            * we are still accepting timeout or if we had a timeout failure.
            * if we failed then we will need to reinit */
           if (!mbx->timeout) {
                   ret_val = -E1000_ERR_MAC_INIT;
                   goto out;
           }
   
           /* if we passed all the tests above then the link is up and we no
            * longer need to check for link */
           mac->get_link_status = FALSE;
   
   out:
           return ret_val;
   }
   

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