--- /dev/null
+/*******************************************************************************
+
+ Intel(R) 82576 Virtual Function Linux driver
+ Copyright(c) 1999 - 2008 Intel Corporation.
+
+ This program is free software; you can redistribute it and/or modify it
+ under the terms and conditions of the GNU General Public License,
+ version 2, as published by the Free Software Foundation.
+
+ This program is distributed in the hope it will be useful, but WITHOUT
+ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ more details.
+
+ You should have received a copy of the GNU General Public License along with
+ this program; if not, write to the Free Software Foundation, Inc.,
+ 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+
+ The full GNU General Public License is included in this distribution in
+ the file called "COPYING".
+
+ Contact Information:
+ Linux NICS <linux.nics@intel.com>
+ e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
+ Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+
+*******************************************************************************/
+
+FILE_LICENCE ( GPL2_ONLY );
+
+#include "igbvf_vf.h"
+
+
+static s32 igbvf_init_mac_params_vf(struct e1000_hw *hw);
+static s32 igbvf_check_for_link_vf(struct e1000_hw *hw);
+static s32 igbvf_get_link_up_info_vf(struct e1000_hw *hw, u16 *speed,
+ u16 *duplex);
+static s32 igbvf_init_hw_vf(struct e1000_hw *hw);
+static s32 igbvf_reset_hw_vf(struct e1000_hw *hw);
+static void igbvf_update_mc_addr_list_vf(struct e1000_hw *hw, u8 *, u32);
+static void igbvf_rar_set_vf(struct e1000_hw *, u8 *, u32);
+static s32 igbvf_read_mac_addr_vf(struct e1000_hw *);
+
+/**
+ * igbvf_init_mac_params_vf - Inits MAC params
+ * @hw: pointer to the HW structure
+ **/
+static s32 igbvf_init_mac_params_vf(struct e1000_hw *hw)
+{
+ struct e1000_mac_info *mac = &hw->mac;
+
+ DEBUGFUNC("igbvf_init_mac_params_vf");
+
+ /* 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 */
+ /* reset */
+ mac->ops.reset_hw = igbvf_reset_hw_vf;
+ /* hw initialization */
+ mac->ops.init_hw = igbvf_init_hw_vf;
+ /* check for link */
+ mac->ops.check_for_link = igbvf_check_for_link_vf;
+ /* link info */
+ mac->ops.get_link_up_info = igbvf_get_link_up_info_vf;
+ /* multicast address update */
+ mac->ops.update_mc_addr_list = igbvf_update_mc_addr_list_vf;
+ /* set mac address */
+ mac->ops.rar_set = igbvf_rar_set_vf;
+ /* read mac address */
+ mac->ops.read_mac_addr = igbvf_read_mac_addr_vf;
+
+
+ return E1000_SUCCESS;
+}
+
+/**
+ * igbvf_init_function_pointers_vf - Inits function pointers
+ * @hw: pointer to the HW structure
+ **/
+void igbvf_init_function_pointers_vf(struct e1000_hw *hw)
+{
+ DEBUGFUNC("igbvf_init_function_pointers_vf");
+
+ hw->mac.ops.init_params = igbvf_init_mac_params_vf;
+ hw->mbx.ops.init_params = igbvf_init_mbx_params_vf;
+}
+
+/**
+ * igbvf_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 igbvf_get_link_up_info_vf(struct e1000_hw *hw, u16 *speed,
+ u16 *duplex)
+{
+ s32 status;
+
+ DEBUGFUNC("igbvf_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;
+}
+
+/**
+ * igbvf_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 igbvf_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("igbvf_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;
+}
+
+/**
+ * igbvf_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 igbvf_init_hw_vf(struct e1000_hw *hw)
+{
+ DEBUGFUNC("igbvf_init_hw_vf");
+
+ /* attempt to set and restore our mac address */
+ igbvf_rar_set_vf(hw, hw->mac.addr, 0);
+
+ return E1000_SUCCESS;
+}
+
+/**
+ * igbvf_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 void igbvf_rar_set_vf(struct e1000_hw *hw, u8 * addr, u32 index __unused)
+{
+ 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)))
+ igbvf_read_mac_addr_vf(hw);
+}
+
+/**
+ * igbvf_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. See
+ * igbvf_mta_set_generic()
+ **/
+static u32 igbvf_hash_mc_addr_vf(struct e1000_hw *hw, u8 *mc_addr)
+{
+ u32 hash_value, hash_mask;
+ u8 bit_shift = 0;
+
+ DEBUGFUNC("igbvf_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;
+}
+
+/**
+ * igbvf_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 igbvf_update_mc_addr_list_vf(struct e1000_hw *hw,
+ u8 *mc_addr_list, u32 mc_addr_count)
+{
+ struct e1000_mbx_info *mbx = &hw->mbx;
+ u32 msgbuf[E1000_VFMAILBOX_SIZE];
+ u16 *hash_list = (u16 *)&msgbuf[1];
+ u32 hash_value;
+ u32 i;
+
+ DEBUGFUNC("igbvf_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);
+
+ msgbuf[0] = E1000_VF_SET_MULTICAST;
+
+ if (mc_addr_count > 30) {
+ msgbuf[0] |= E1000_VF_SET_MULTICAST_OVERFLOW;
+ mc_addr_count = 30;
+ }
+
+ msgbuf[0] |= mc_addr_count << E1000_VT_MSGINFO_SHIFT;
+
+ for (i = 0; i < mc_addr_count; i++) {
+ hash_value = igbvf_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;
+ }
+
+ mbx->ops.write_posted(hw, msgbuf, E1000_VFMAILBOX_SIZE, 0);
+}
+
+/**
+ * igbvf_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 igbvf_vfta_set_vf(struct e1000_hw *hw, u16 vid, bool set)
+{
+ struct e1000_mbx_info *mbx = &hw->mbx;
+ 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;
+
+ mbx->ops.write_posted(hw, msgbuf, 2, 0);
+}
+
+/** igbvf_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 igbvf_rlpml_set_vf(struct e1000_hw *hw, u16 max_size)
+{
+ struct e1000_mbx_info *mbx = &hw->mbx;
+ u32 msgbuf[2];
+
+ msgbuf[0] = E1000_VF_SET_LPE;
+ msgbuf[1] = max_size;
+
+ mbx->ops.write_posted(hw, msgbuf, 2, 0);
+}
+
+/**
+ * igbvf_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 igbvf_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;
+}
+
+/**
+ * igbvf_read_mac_addr_vf - Read device MAC address
+ * @hw: pointer to the HW structure
+ **/
+static s32 igbvf_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;
+}
+
+/**
+ * igbvf_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 igbvf_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("igbvf_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 drop the link */
+ if (!mbx->ops.check_for_rst(hw, 0))
+ 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;
+}
+
Code Review / kvmfornfv.git / blobdiff