ixgbevf: 82599 Virtual Function core functions and header

This module and header file contain the core functions for the 82599
virtual function device.

Signed-off-by: Greg Rose <gregory.v.rose@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 387 insertions, 0 deletions

diff --git a/drivers/net/ixgbevf/vf.c b/drivers/net/ixgbevf/vf.c
new file mode 100644
index 00000000000..4b5dec0ec14
--- /dev/null
+++ b/drivers/net/ixgbevf/vf.c
@@ -0,0 +1,387 @@
+/*******************************************************************************
+
+  Intel 82599 Virtual Function driver
+  Copyright(c) 1999 - 2009 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:
+  e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
+  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+
+*******************************************************************************/
+
+#include "vf.h"
+
+/**
+ *  ixgbevf_start_hw_vf - Prepare hardware for Tx/Rx
+ *  @hw: pointer to hardware structure
+ *
+ *  Starts the hardware by filling the bus info structure and media type, clears
+ *  all on chip counters, initializes receive address registers, multicast
+ *  table, VLAN filter table, calls routine to set up link and flow control
+ *  settings, and leaves transmit and receive units disabled and uninitialized
+ **/
+static s32 ixgbevf_start_hw_vf(struct ixgbe_hw *hw)
+{
+	/* Clear adapter stopped flag */
+	hw->adapter_stopped = false;
+
+	return 0;
+}
+
+/**
+ *  ixgbevf_init_hw_vf - virtual function hardware initialization
+ *  @hw: pointer to hardware structure
+ *
+ *  Initialize the hardware by resetting the hardware and then starting
+ *  the hardware
+ **/
+static s32 ixgbevf_init_hw_vf(struct ixgbe_hw *hw)
+{
+	s32 status = hw->mac.ops.start_hw(hw);
+
+	hw->mac.ops.get_mac_addr(hw, hw->mac.addr);
+
+	return status;
+}
+
+/**
+ *  ixgbevf_reset_hw_vf - Performs hardware reset
+ *  @hw: pointer to hardware structure
+ *
+ *  Resets the hardware by reseting the transmit and receive units, masks and
+ *  clears all interrupts.
+ **/
+static s32 ixgbevf_reset_hw_vf(struct ixgbe_hw *hw)
+{
+	struct ixgbe_mbx_info *mbx = &hw->mbx;
+	u32 timeout = IXGBE_VF_INIT_TIMEOUT;
+	s32 ret_val = IXGBE_ERR_INVALID_MAC_ADDR;
+	u32 msgbuf[IXGBE_VF_PERMADDR_MSG_LEN];
+	u8 *addr = (u8 *)(&msgbuf[1]);
+
+	/* Call adapter stop to disable tx/rx and clear interrupts */
+	hw->mac.ops.stop_adapter(hw);
+
+	IXGBE_WRITE_REG(hw, IXGBE_VFCTRL, IXGBE_CTRL_RST);
+	IXGBE_WRITE_FLUSH(hw);
+
+	/* we cannot reset while the RSTI / RSTD bits are asserted */
+	while (!mbx->ops.check_for_rst(hw) && timeout) {
+		timeout--;
+		udelay(5);
+	}
+
+	if (!timeout)
+		return IXGBE_ERR_RESET_FAILED;
+
+	/* mailbox timeout can now become active */
+	mbx->timeout = IXGBE_VF_MBX_INIT_TIMEOUT;
+
+	msgbuf[0] = IXGBE_VF_RESET;
+	mbx->ops.write_posted(hw, msgbuf, 1);
+
+	msleep(10);
+
+	/* set our "perm_addr" based on info provided by PF */
+	/* also set up the mc_filter_type which is piggy backed
+	 * on the mac address in word 3 */
+	ret_val = mbx->ops.read_posted(hw, msgbuf, IXGBE_VF_PERMADDR_MSG_LEN);
+	if (ret_val)
+		return ret_val;
+
+	if (msgbuf[0] != (IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_ACK))
+		return IXGBE_ERR_INVALID_MAC_ADDR;
+
+	memcpy(hw->mac.perm_addr, addr, IXGBE_ETH_LENGTH_OF_ADDRESS);
+	hw->mac.mc_filter_type = msgbuf[IXGBE_VF_MC_TYPE_WORD];
+
+	return 0;
+}
+
+/**
+ *  ixgbevf_stop_hw_vf - Generic stop Tx/Rx units
+ *  @hw: pointer to hardware structure
+ *
+ *  Sets the adapter_stopped flag within ixgbe_hw struct. Clears interrupts,
+ *  disables transmit and receive units. The adapter_stopped flag is used by
+ *  the shared code and drivers to determine if the adapter is in a stopped
+ *  state and should not touch the hardware.
+ **/
+static s32 ixgbevf_stop_hw_vf(struct ixgbe_hw *hw)
+{
+	u32 number_of_queues;
+	u32 reg_val;
+	u16 i;
+
+	/*
+	 * Set the adapter_stopped flag so other driver functions stop touching
+	 * the hardware
+	 */
+	hw->adapter_stopped = true;
+
+	/* Disable the receive unit by stopped each queue */
+	number_of_queues = hw->mac.max_rx_queues;
+	for (i = 0; i < number_of_queues; i++) {
+		reg_val = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(i));
+		if (reg_val & IXGBE_RXDCTL_ENABLE) {
+			reg_val &= ~IXGBE_RXDCTL_ENABLE;
+			IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(i), reg_val);
+		}
+	}
+
+	IXGBE_WRITE_FLUSH(hw);
+
+	/* Clear interrupt mask to stop from interrupts being generated */
+	IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, IXGBE_VF_IRQ_CLEAR_MASK);
+
+	/* Clear any pending interrupts */
+	IXGBE_READ_REG(hw, IXGBE_VTEICR);
+
+	/* Disable the transmit unit.  Each queue must be disabled. */
+	number_of_queues = hw->mac.max_tx_queues;
+	for (i = 0; i < number_of_queues; i++) {
+		reg_val = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(i));
+		if (reg_val & IXGBE_TXDCTL_ENABLE) {
+			reg_val &= ~IXGBE_TXDCTL_ENABLE;
+			IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(i), reg_val);
+		}
+	}
+
+	return 0;
+}
+
+/**
+ *  ixgbevf_mta_vector - Determines bit-vector in multicast table to set
+ *  @hw: pointer to hardware structure
+ *  @mc_addr: the multicast address
+ *
+ *  Extracts the 12 bits, from a multicast address, to determine which
+ *  bit-vector to set in the multicast table. The hardware uses 12 bits, from
+ *  incoming rx multicast addresses, to determine the bit-vector to check in
+ *  the MTA. Which of the 4 combination, of 12-bits, the hardware uses is set
+ *  by the MO field of the MCSTCTRL. The MO field is set during initialization
+ *  to mc_filter_type.
+ **/
+static s32 ixgbevf_mta_vector(struct ixgbe_hw *hw, u8 *mc_addr)
+{
+	u32 vector = 0;
+
+	switch (hw->mac.mc_filter_type) {
+	case 0:   /* use bits [47:36] of the address */
+		vector = ((mc_addr[4] >> 4) | (((u16)mc_addr[5]) << 4));
+		break;
+	case 1:   /* use bits [46:35] of the address */
+		vector = ((mc_addr[4] >> 3) | (((u16)mc_addr[5]) << 5));
+		break;
+	case 2:   /* use bits [45:34] of the address */
+		vector = ((mc_addr[4] >> 2) | (((u16)mc_addr[5]) << 6));
+		break;
+	case 3:   /* use bits [43:32] of the address */
+		vector = ((mc_addr[4]) | (((u16)mc_addr[5]) << 8));
+		break;
+	default:  /* Invalid mc_filter_type */
+		break;
+	}
+
+	/* vector can only be 12-bits or boundary will be exceeded */
+	vector &= 0xFFF;
+	return vector;
+}
+
+/**
+ *  ixgbevf_get_mac_addr_vf - Read device MAC address
+ *  @hw: pointer to the HW structure
+ *  @mac_addr: pointer to storage for retrieved MAC address
+ **/
+static s32 ixgbevf_get_mac_addr_vf(struct ixgbe_hw *hw, u8 *mac_addr)
+{
+	memcpy(mac_addr, hw->mac.perm_addr, IXGBE_ETH_LENGTH_OF_ADDRESS);
+
+	return 0;
+}
+
+/**
+ *  ixgbevf_set_rar_vf - set device MAC address
+ *  @hw: pointer to hardware structure
+ *  @index: Receive address register to write
+ *  @addr: Address to put into receive address register
+ *  @vmdq: Unused in this implementation
+ **/
+static s32 ixgbevf_set_rar_vf(struct ixgbe_hw *hw, u32 index, u8 *addr,
+			      u32 vmdq)
+{
+	struct ixgbe_mbx_info *mbx = &hw->mbx;
+	u32 msgbuf[3];
+	u8 *msg_addr = (u8 *)(&msgbuf[1]);
+	s32 ret_val;
+
+	memset(msgbuf, 0, sizeof(msgbuf));
+	msgbuf[0] = IXGBE_VF_SET_MAC_ADDR;
+	memcpy(msg_addr, addr, 6);
+	ret_val = mbx->ops.write_posted(hw, msgbuf, 3);
+
+	if (!ret_val)
+		ret_val = mbx->ops.read_posted(hw, msgbuf, 3);
+
+	msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
+
+	/* if nacked the address was rejected, use "perm_addr" */
+	if (!ret_val &&
+	    (msgbuf[0] == (IXGBE_VF_SET_MAC_ADDR | IXGBE_VT_MSGTYPE_NACK)))
+		ixgbevf_get_mac_addr_vf(hw, hw->mac.addr);
+
+	return ret_val;
+}
+
+/**
+ *  ixgbevf_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
+ *  @next: caller supplied function to return next address in list
+ *
+ *  Updates the Multicast Table Array.
+ **/
+static s32 ixgbevf_update_mc_addr_list_vf(struct ixgbe_hw *hw, u8 *mc_addr_list,
+					u32 mc_addr_count,
+					ixgbe_mc_addr_itr next)
+{
+	struct ixgbe_mbx_info *mbx = &hw->mbx;
+	u32 msgbuf[IXGBE_VFMAILBOX_SIZE];
+	u16 *vector_list = (u16 *)&msgbuf[1];
+	u32 vector;
+	u32 cnt, i;
+	u32 vmdq;
+
+	/* 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.
+	 */
+
+	cnt = (mc_addr_count > 30) ? 30 : mc_addr_count;
+	msgbuf[0] = IXGBE_VF_SET_MULTICAST;
+	msgbuf[0] |= cnt << IXGBE_VT_MSGINFO_SHIFT;
+
+	for (i = 0; i < cnt; i++) {
+		vector = ixgbevf_mta_vector(hw, next(hw, &mc_addr_list, &vmdq));
+		vector_list[i] = vector;
+	}
+
+	mbx->ops.write_posted(hw, msgbuf, IXGBE_VFMAILBOX_SIZE);
+
+	return 0;
+}
+
+/**
+ *  ixgbevf_set_vfta_vf - Set/Unset vlan filter table address
+ *  @hw: pointer to the HW structure
+ *  @vlan: 12 bit VLAN ID
+ *  @vind: unused by VF drivers
+ *  @vlan_on: if true then set bit, else clear bit
+ **/
+static s32 ixgbevf_set_vfta_vf(struct ixgbe_hw *hw, u32 vlan, u32 vind,
+			       bool vlan_on)
+{
+	struct ixgbe_mbx_info *mbx = &hw->mbx;
+	u32 msgbuf[2];
+
+	msgbuf[0] = IXGBE_VF_SET_VLAN;
+	msgbuf[1] = vlan;
+	/* Setting the 8 bit field MSG INFO to TRUE indicates "add" */
+	msgbuf[0] |= vlan_on << IXGBE_VT_MSGINFO_SHIFT;
+
+	return mbx->ops.write_posted(hw, msgbuf, 2);
+}
+
+/**
+ *  ixgbevf_setup_mac_link_vf - Setup MAC link settings
+ *  @hw: pointer to hardware structure
+ *  @speed: Unused in this implementation
+ *  @autoneg: Unused in this implementation
+ *  @autoneg_wait_to_complete: Unused in this implementation
+ *
+ *  Do nothing and return success.  VF drivers are not allowed to change
+ *  global settings.  Maintained for driver compatibility.
+ **/
+static s32 ixgbevf_setup_mac_link_vf(struct ixgbe_hw *hw,
+				     ixgbe_link_speed speed, bool autoneg,
+				     bool autoneg_wait_to_complete)
+{
+	return 0;
+}
+
+/**
+ *  ixgbevf_check_mac_link_vf - Get link/speed status
+ *  @hw: pointer to hardware structure
+ *  @speed: pointer to link speed
+ *  @link_up: true is link is up, false otherwise
+ *  @autoneg_wait_to_complete: true when waiting for completion is needed
+ *
+ *  Reads the links register to determine if link is up and the current speed
+ **/
+static s32 ixgbevf_check_mac_link_vf(struct ixgbe_hw *hw,
+				     ixgbe_link_speed *speed,
+				     bool *link_up,
+				     bool autoneg_wait_to_complete)
+{
+	u32 links_reg;
+
+	if (!(hw->mbx.ops.check_for_rst(hw))) {
+		*link_up = false;
+		*speed = 0;
+		return -1;
+	}
+
+	links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS);
+
+	if (links_reg & IXGBE_LINKS_UP)
+		*link_up = true;
+	else
+		*link_up = false;
+
+	if (links_reg & IXGBE_LINKS_SPEED)
+		*speed = IXGBE_LINK_SPEED_10GB_FULL;
+	else
+		*speed = IXGBE_LINK_SPEED_1GB_FULL;
+
+	return 0;
+}
+
+struct ixgbe_mac_operations ixgbevf_mac_ops = {
+	.init_hw             = ixgbevf_init_hw_vf,
+	.reset_hw            = ixgbevf_reset_hw_vf,
+	.start_hw            = ixgbevf_start_hw_vf,
+	.get_mac_addr        = ixgbevf_get_mac_addr_vf,
+	.stop_adapter        = ixgbevf_stop_hw_vf,
+	.setup_link          = ixgbevf_setup_mac_link_vf,
+	.check_link          = ixgbevf_check_mac_link_vf,
+	.set_rar             = ixgbevf_set_rar_vf,
+	.update_mc_addr_list = ixgbevf_update_mc_addr_list_vf,
+	.set_vfta            = ixgbevf_set_vfta_vf,
+};
+
+struct ixgbevf_info ixgbevf_vf_info = {
+	.mac = ixgbe_mac_82599_vf,
+	.mac_ops = &ixgbevf_mac_ops,
+};
+