Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1078 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/ixgbevf/vf.c b/drivers/net/ethernet/intel/ixgbevf/vf.c
new file mode 100644
index 000000000..1641d00d8
--- /dev/null
+++ b/drivers/net/ethernet/intel/ixgbevf/vf.c
@@ -0,0 +1,1078 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright(c) 1999 - 2018 Intel Corporation. */
+
+#include "vf.h"
+#include "ixgbevf.h"
+
+/* On Hyper-V, to reset, we need to read from this offset
+ * from the PCI config space. This is the mechanism used on
+ * Hyper-V to support PF/VF communication.
+ */
+#define IXGBE_HV_RESET_OFFSET           0x201
+
+static inline s32 ixgbevf_write_msg_read_ack(struct ixgbe_hw *hw, u32 *msg,
+					     u32 *retmsg, u16 size)
+{
+	s32 retval = ixgbevf_write_mbx(hw, msg, size);
+
+	if (retval)
+		return retval;
+
+	return ixgbevf_poll_mbx(hw, retmsg, size);
+}
+
+/**
+ *  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 resetting 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;
+	u32 msgbuf[IXGBE_VF_PERMADDR_MSG_LEN];
+	u8 *addr = (u8 *)(&msgbuf[1]);
+	s32 ret_val;
+
+	/* Call adapter stop to disable tx/rx and clear interrupts */
+	hw->mac.ops.stop_adapter(hw);
+
+	/* reset the api version */
+	hw->api_version = ixgbe_mbox_api_10;
+	hw->mbx.ops.init_params(hw);
+	memcpy(&hw->mbx.ops, &ixgbevf_mbx_ops_legacy,
+	       sizeof(struct ixgbe_mbx_operations));
+
+	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;
+	ixgbevf_write_mbx(hw, msgbuf, 1);
+
+	mdelay(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 = ixgbevf_poll_mbx(hw, msgbuf, IXGBE_VF_PERMADDR_MSG_LEN);
+	if (ret_val)
+		return ret_val;
+
+	/* New versions of the PF may NACK the reset return message
+	 * to indicate that no MAC address has yet been assigned for
+	 * the VF.
+	 */
+	if (msgbuf[0] != (IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_SUCCESS) &&
+	    msgbuf[0] != (IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_FAILURE))
+		return IXGBE_ERR_INVALID_MAC_ADDR;
+
+	if (msgbuf[0] == (IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_SUCCESS))
+		ether_addr_copy(hw->mac.perm_addr, addr);
+
+	hw->mac.mc_filter_type = msgbuf[IXGBE_VF_MC_TYPE_WORD];
+
+	return 0;
+}
+
+/**
+ * ixgbevf_hv_reset_hw_vf - reset via Hyper-V
+ * @hw: pointer to private hardware struct
+ *
+ * Hyper-V variant; the VF/PF communication is through the PCI
+ * config space.
+ */
+static s32 ixgbevf_hv_reset_hw_vf(struct ixgbe_hw *hw)
+{
+#if IS_ENABLED(CONFIG_PCI_MMCONFIG)
+	struct ixgbevf_adapter *adapter = hw->back;
+	int i;
+
+	for (i = 0; i < 6; i++)
+		pci_read_config_byte(adapter->pdev,
+				     (i + IXGBE_HV_RESET_OFFSET),
+				     &hw->mac.perm_addr[i]);
+	return 0;
+#else
+	pr_err("PCI_MMCONFIG needs to be enabled for Hyper-V\n");
+	return -EOPNOTSUPP;
+#endif
+}
+
+/**
+ *  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)
+{
+	ether_addr_copy(mac_addr, hw->mac.perm_addr);
+
+	return 0;
+}
+
+static s32 ixgbevf_set_uc_addr_vf(struct ixgbe_hw *hw, u32 index, u8 *addr)
+{
+	u32 msgbuf[3], msgbuf_chk;
+	u8 *msg_addr = (u8 *)(&msgbuf[1]);
+	s32 ret_val;
+
+	memset(msgbuf, 0, sizeof(msgbuf));
+	/* If index is one then this is the start of a new list and needs
+	 * indication to the PF so it can do it's own list management.
+	 * If it is zero then that tells the PF to just clear all of
+	 * this VF's macvlans and there is no new list.
+	 */
+	msgbuf[0] |= index << IXGBE_VT_MSGINFO_SHIFT;
+	msgbuf[0] |= IXGBE_VF_SET_MACVLAN;
+	msgbuf_chk = msgbuf[0];
+
+	if (addr)
+		ether_addr_copy(msg_addr, addr);
+
+	ret_val = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
+					     ARRAY_SIZE(msgbuf));
+	if (!ret_val) {
+		msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
+
+		if (msgbuf[0] == (msgbuf_chk | IXGBE_VT_MSGTYPE_FAILURE))
+			return -ENOMEM;
+	}
+
+	return ret_val;
+}
+
+static s32 ixgbevf_hv_set_uc_addr_vf(struct ixgbe_hw *hw, u32 index, u8 *addr)
+{
+	return -EOPNOTSUPP;
+}
+
+/**
+ * ixgbevf_get_reta_locked - get the RSS redirection table (RETA) contents.
+ * @hw: pointer to hardware structure
+ * @reta: buffer to fill with RETA contents.
+ * @num_rx_queues: Number of Rx queues configured for this port
+ *
+ * The "reta" buffer should be big enough to contain 32 registers.
+ *
+ * Returns: 0 on success.
+ *          if API doesn't support this operation - (-EOPNOTSUPP).
+ */
+int ixgbevf_get_reta_locked(struct ixgbe_hw *hw, u32 *reta, int num_rx_queues)
+{
+	int err, i, j;
+	u32 msgbuf[IXGBE_VFMAILBOX_SIZE];
+	u32 *hw_reta = &msgbuf[1];
+	u32 mask = 0;
+
+	/* We have to use a mailbox for 82599 and x540 devices only.
+	 * For these devices RETA has 128 entries.
+	 * Also these VFs support up to 4 RSS queues. Therefore PF will compress
+	 * 16 RETA entries in each DWORD giving 2 bits to each entry.
+	 */
+	int dwords = IXGBEVF_82599_RETA_SIZE / 16;
+
+	/* We support the RSS querying for 82599 and x540 devices only.
+	 * Thus return an error if API doesn't support RETA querying or querying
+	 * is not supported for this device type.
+	 */
+	switch (hw->api_version) {
+	case ixgbe_mbox_api_15:
+	case ixgbe_mbox_api_14:
+	case ixgbe_mbox_api_13:
+	case ixgbe_mbox_api_12:
+		if (hw->mac.type < ixgbe_mac_X550_vf)
+			break;
+		fallthrough;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	msgbuf[0] = IXGBE_VF_GET_RETA;
+
+	err = ixgbevf_write_mbx(hw, msgbuf, 1);
+
+	if (err)
+		return err;
+
+	err = ixgbevf_poll_mbx(hw, msgbuf, dwords + 1);
+
+	if (err)
+		return err;
+
+	msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
+
+	/* If the operation has been refused by a PF return -EPERM */
+	if (msgbuf[0] == (IXGBE_VF_GET_RETA | IXGBE_VT_MSGTYPE_FAILURE))
+		return -EPERM;
+
+	/* If we didn't get an ACK there must have been
+	 * some sort of mailbox error so we should treat it
+	 * as such.
+	 */
+	if (msgbuf[0] != (IXGBE_VF_GET_RETA | IXGBE_VT_MSGTYPE_SUCCESS))
+		return IXGBE_ERR_MBX;
+
+	/* ixgbevf doesn't support more than 2 queues at the moment */
+	if (num_rx_queues > 1)
+		mask = 0x1;
+
+	for (i = 0; i < dwords; i++)
+		for (j = 0; j < 16; j++)
+			reta[i * 16 + j] = (hw_reta[i] >> (2 * j)) & mask;
+
+	return 0;
+}
+
+/**
+ * ixgbevf_get_rss_key_locked - get the RSS Random Key
+ * @hw: pointer to the HW structure
+ * @rss_key: buffer to fill with RSS Hash Key contents.
+ *
+ * The "rss_key" buffer should be big enough to contain 10 registers.
+ *
+ * Returns: 0 on success.
+ *          if API doesn't support this operation - (-EOPNOTSUPP).
+ */
+int ixgbevf_get_rss_key_locked(struct ixgbe_hw *hw, u8 *rss_key)
+{
+	int err;
+	u32 msgbuf[IXGBE_VFMAILBOX_SIZE];
+
+	/* We currently support the RSS Random Key retrieval for 82599 and x540
+	 * devices only.
+	 *
+	 * Thus return an error if API doesn't support RSS Random Key retrieval
+	 * or if the operation is not supported for this device type.
+	 */
+	switch (hw->api_version) {
+	case ixgbe_mbox_api_15:
+	case ixgbe_mbox_api_14:
+	case ixgbe_mbox_api_13:
+	case ixgbe_mbox_api_12:
+		if (hw->mac.type < ixgbe_mac_X550_vf)
+			break;
+		fallthrough;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	msgbuf[0] = IXGBE_VF_GET_RSS_KEY;
+	err = ixgbevf_write_mbx(hw, msgbuf, 1);
+
+	if (err)
+		return err;
+
+	err = ixgbevf_poll_mbx(hw, msgbuf, 11);
+
+	if (err)
+		return err;
+
+	msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
+
+	/* If the operation has been refused by a PF return -EPERM */
+	if (msgbuf[0] == (IXGBE_VF_GET_RSS_KEY | IXGBE_VT_MSGTYPE_FAILURE))
+		return -EPERM;
+
+	/* If we didn't get an ACK there must have been
+	 * some sort of mailbox error so we should treat it
+	 * as such.
+	 */
+	if (msgbuf[0] != (IXGBE_VF_GET_RSS_KEY | IXGBE_VT_MSGTYPE_SUCCESS))
+		return IXGBE_ERR_MBX;
+
+	memcpy(rss_key, msgbuf + 1, IXGBEVF_RSS_HASH_KEY_SIZE);
+
+	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)
+{
+	u32 msgbuf[3];
+	u8 *msg_addr = (u8 *)(&msgbuf[1]);
+	s32 ret_val;
+
+	memset(msgbuf, 0, sizeof(msgbuf));
+	msgbuf[0] = IXGBE_VF_SET_MAC_ADDR;
+	ether_addr_copy(msg_addr, addr);
+
+	ret_val = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
+					     ARRAY_SIZE(msgbuf));
+	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_FAILURE))) {
+		ixgbevf_get_mac_addr_vf(hw, hw->mac.addr);
+		return IXGBE_ERR_MBX;
+	}
+
+	return ret_val;
+}
+
+/**
+ *  ixgbevf_hv_set_rar_vf - set device MAC address Hyper-V variant
+ *  @hw: pointer to hardware structure
+ *  @index: Receive address register to write
+ *  @addr: Address to put into receive address register
+ *  @vmdq: Unused in this implementation
+ *
+ * We don't really allow setting the device MAC address. However,
+ * if the address being set is the permanent MAC address we will
+ * permit that.
+ **/
+static s32 ixgbevf_hv_set_rar_vf(struct ixgbe_hw *hw, u32 index, u8 *addr,
+				 u32 vmdq)
+{
+	if (ether_addr_equal(addr, hw->mac.perm_addr))
+		return 0;
+
+	return -EOPNOTSUPP;
+}
+
+/**
+ *  ixgbevf_update_mc_addr_list_vf - Update Multicast addresses
+ *  @hw: pointer to the HW structure
+ *  @netdev: pointer to net device structure
+ *
+ *  Updates the Multicast Table Array.
+ **/
+static s32 ixgbevf_update_mc_addr_list_vf(struct ixgbe_hw *hw,
+					  struct net_device *netdev)
+{
+	struct netdev_hw_addr *ha;
+	u32 msgbuf[IXGBE_VFMAILBOX_SIZE];
+	u16 *vector_list = (u16 *)&msgbuf[1];
+	u32 cnt, i;
+
+	/* 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 = netdev_mc_count(netdev);
+	if (cnt > 30)
+		cnt = 30;
+	msgbuf[0] = IXGBE_VF_SET_MULTICAST;
+	msgbuf[0] |= cnt << IXGBE_VT_MSGINFO_SHIFT;
+
+	i = 0;
+	netdev_for_each_mc_addr(ha, netdev) {
+		if (i == cnt)
+			break;
+		if (is_link_local_ether_addr(ha->addr))
+			continue;
+
+		vector_list[i++] = ixgbevf_mta_vector(hw, ha->addr);
+	}
+
+	return ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
+			IXGBE_VFMAILBOX_SIZE);
+}
+
+/**
+ * ixgbevf_hv_update_mc_addr_list_vf - stub
+ * @hw: unused
+ * @netdev: unused
+ *
+ * Hyper-V variant - just a stub.
+ */
+static s32 ixgbevf_hv_update_mc_addr_list_vf(struct ixgbe_hw *hw,
+					     struct net_device *netdev)
+{
+	return -EOPNOTSUPP;
+}
+
+/**
+ *  ixgbevf_update_xcast_mode - Update Multicast mode
+ *  @hw: pointer to the HW structure
+ *  @xcast_mode: new multicast mode
+ *
+ *  Updates the Multicast Mode of VF.
+ **/
+static s32 ixgbevf_update_xcast_mode(struct ixgbe_hw *hw, int xcast_mode)
+{
+	u32 msgbuf[2];
+	s32 err;
+
+	switch (hw->api_version) {
+	case ixgbe_mbox_api_12:
+		/* promisc introduced in 1.3 version */
+		if (xcast_mode == IXGBEVF_XCAST_MODE_PROMISC)
+			return -EOPNOTSUPP;
+		fallthrough;
+	case ixgbe_mbox_api_13:
+	case ixgbe_mbox_api_14:
+	case ixgbe_mbox_api_15:
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	msgbuf[0] = IXGBE_VF_UPDATE_XCAST_MODE;
+	msgbuf[1] = xcast_mode;
+
+	err = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
+					 ARRAY_SIZE(msgbuf));
+	if (err)
+		return err;
+
+	msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
+	if (msgbuf[0] == (IXGBE_VF_UPDATE_XCAST_MODE | IXGBE_VT_MSGTYPE_FAILURE))
+		return -EPERM;
+
+	return 0;
+}
+
+/**
+ * ixgbevf_hv_update_xcast_mode - stub
+ * @hw: unused
+ * @xcast_mode: unused
+ *
+ * Hyper-V variant - just a stub.
+ */
+static s32 ixgbevf_hv_update_xcast_mode(struct ixgbe_hw *hw, int xcast_mode)
+{
+	return -EOPNOTSUPP;
+}
+
+/**
+ * ixgbevf_get_link_state_vf - Get VF link state from PF
+ * @hw: pointer to the HW structure
+ * @link_state: link state storage
+ *
+ * Returns state of the operation error or success.
+ */
+static s32 ixgbevf_get_link_state_vf(struct ixgbe_hw *hw, bool *link_state)
+{
+	u32 msgbuf[2];
+	s32 ret_val;
+	s32 err;
+
+	msgbuf[0] = IXGBE_VF_GET_LINK_STATE;
+	msgbuf[1] = 0x0;
+
+	err = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf, 2);
+
+	if (err || (msgbuf[0] & IXGBE_VT_MSGTYPE_FAILURE)) {
+		ret_val = IXGBE_ERR_MBX;
+	} else {
+		ret_val = 0;
+		*link_state = msgbuf[1];
+	}
+
+	return ret_val;
+}
+
+/**
+ * ixgbevf_hv_get_link_state_vf - * Hyper-V variant - just a stub.
+ * @hw: unused
+ * @link_state: unused
+ *
+ * Hyper-V variant; there is no mailbox communication.
+ */
+static s32 ixgbevf_hv_get_link_state_vf(struct ixgbe_hw *hw, bool *link_state)
+{
+	return -EOPNOTSUPP;
+}
+
+/**
+ *  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)
+{
+	u32 msgbuf[2];
+	s32 err;
+
+	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;
+
+	err = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
+					 ARRAY_SIZE(msgbuf));
+	if (err)
+		goto mbx_err;
+
+	/* remove extra bits from the message */
+	msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
+	msgbuf[0] &= ~(0xFF << IXGBE_VT_MSGINFO_SHIFT);
+
+	if (msgbuf[0] != (IXGBE_VF_SET_VLAN | IXGBE_VT_MSGTYPE_SUCCESS))
+		err = IXGBE_ERR_INVALID_ARGUMENT;
+
+mbx_err:
+	return err;
+}
+
+/**
+ * ixgbevf_hv_set_vfta_vf - * Hyper-V variant - just a stub.
+ * @hw: unused
+ * @vlan: unused
+ * @vind: unused
+ * @vlan_on: unused
+ */
+static s32 ixgbevf_hv_set_vfta_vf(struct ixgbe_hw *hw, u32 vlan, u32 vind,
+				  bool vlan_on)
+{
+	return -EOPNOTSUPP;
+}
+
+/**
+ *  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: unused
+ *
+ *  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)
+{
+	struct ixgbe_mbx_info *mbx = &hw->mbx;
+	struct ixgbe_mac_info *mac = &hw->mac;
+	s32 ret_val = 0;
+	u32 links_reg;
+	u32 in_msg = 0;
+
+	/* If we were hit with a reset drop the link */
+	if (!mbx->ops.check_for_rst(hw) || !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 */
+	links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS);
+	if (!(links_reg & IXGBE_LINKS_UP))
+		goto out;
+
+	/* for SFP+ modules and DA cables on 82599 it can take up to 500usecs
+	 * before the link status is correct
+	 */
+	if (mac->type == ixgbe_mac_82599_vf) {
+		int i;
+
+		for (i = 0; i < 5; i++) {
+			udelay(100);
+			links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS);
+
+			if (!(links_reg & IXGBE_LINKS_UP))
+				goto out;
+		}
+	}
+
+	switch (links_reg & IXGBE_LINKS_SPEED_82599) {
+	case IXGBE_LINKS_SPEED_10G_82599:
+		*speed = IXGBE_LINK_SPEED_10GB_FULL;
+		break;
+	case IXGBE_LINKS_SPEED_1G_82599:
+		*speed = IXGBE_LINK_SPEED_1GB_FULL;
+		break;
+	case IXGBE_LINKS_SPEED_100_82599:
+		*speed = IXGBE_LINK_SPEED_100_FULL;
+		break;
+	}
+
+	/* 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)) {
+		if (hw->api_version >= ixgbe_mbox_api_15)
+			mac->get_link_status = false;
+		goto out;
+	}
+
+	if (!(in_msg & IXGBE_VT_MSGTYPE_CTS)) {
+		/* msg is not CTS and is NACK we must have lost CTS status */
+		if (in_msg & IXGBE_VT_MSGTYPE_FAILURE)
+			ret_val = -1;
+		goto out;
+	}
+
+	/* the pf is talking, if we timed out in the past we reinit */
+	if (!mbx->timeout) {
+		ret_val = -1;
+		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:
+	*link_up = !mac->get_link_status;
+	return ret_val;
+}
+
+/**
+ * ixgbevf_hv_check_mac_link_vf - check link
+ * @hw: pointer to private hardware struct
+ * @speed: pointer to link speed
+ * @link_up: true is link is up, false otherwise
+ * @autoneg_wait_to_complete: unused
+ *
+ * Hyper-V variant; there is no mailbox communication.
+ */
+static s32 ixgbevf_hv_check_mac_link_vf(struct ixgbe_hw *hw,
+					ixgbe_link_speed *speed,
+					bool *link_up,
+					bool autoneg_wait_to_complete)
+{
+	struct ixgbe_mbx_info *mbx = &hw->mbx;
+	struct ixgbe_mac_info *mac = &hw->mac;
+	u32 links_reg;
+
+	/* If we were hit with a reset drop the link */
+	if (!mbx->ops.check_for_rst(hw) || !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 */
+	links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS);
+	if (!(links_reg & IXGBE_LINKS_UP))
+		goto out;
+
+	/* for SFP+ modules and DA cables on 82599 it can take up to 500usecs
+	 * before the link status is correct
+	 */
+	if (mac->type == ixgbe_mac_82599_vf) {
+		int i;
+
+		for (i = 0; i < 5; i++) {
+			udelay(100);
+			links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS);
+
+			if (!(links_reg & IXGBE_LINKS_UP))
+				goto out;
+		}
+	}
+
+	switch (links_reg & IXGBE_LINKS_SPEED_82599) {
+	case IXGBE_LINKS_SPEED_10G_82599:
+		*speed = IXGBE_LINK_SPEED_10GB_FULL;
+		break;
+	case IXGBE_LINKS_SPEED_1G_82599:
+		*speed = IXGBE_LINK_SPEED_1GB_FULL;
+		break;
+	case IXGBE_LINKS_SPEED_100_82599:
+		*speed = IXGBE_LINK_SPEED_100_FULL;
+		break;
+	}
+
+	/* 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:
+	*link_up = !mac->get_link_status;
+	return 0;
+}
+
+/**
+ *  ixgbevf_set_rlpml_vf - Set the maximum receive packet length
+ *  @hw: pointer to the HW structure
+ *  @max_size: value to assign to max frame size
+ **/
+static s32 ixgbevf_set_rlpml_vf(struct ixgbe_hw *hw, u16 max_size)
+{
+	u32 msgbuf[2];
+	s32 ret_val;
+
+	msgbuf[0] = IXGBE_VF_SET_LPE;
+	msgbuf[1] = max_size;
+
+	ret_val = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
+					     ARRAY_SIZE(msgbuf));
+	if (ret_val)
+		return ret_val;
+	if ((msgbuf[0] & IXGBE_VF_SET_LPE) &&
+	    (msgbuf[0] & IXGBE_VT_MSGTYPE_FAILURE))
+		return IXGBE_ERR_MBX;
+
+	return 0;
+}
+
+/**
+ * ixgbevf_hv_set_rlpml_vf - Set the maximum receive packet length
+ * @hw: pointer to the HW structure
+ * @max_size: value to assign to max frame size
+ * Hyper-V variant.
+ **/
+static s32 ixgbevf_hv_set_rlpml_vf(struct ixgbe_hw *hw, u16 max_size)
+{
+	u32 reg;
+
+	/* If we are on Hyper-V, we implement this functionality
+	 * differently.
+	 */
+	reg =  IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(0));
+	/* CRC == 4 */
+	reg |= ((max_size + 4) | IXGBE_RXDCTL_RLPML_EN);
+	IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(0), reg);
+
+	return 0;
+}
+
+/**
+ *  ixgbevf_negotiate_api_version_vf - Negotiate supported API version
+ *  @hw: pointer to the HW structure
+ *  @api: integer containing requested API version
+ **/
+static int ixgbevf_negotiate_api_version_vf(struct ixgbe_hw *hw, int api)
+{
+	int err;
+	u32 msg[3];
+
+	/* Negotiate the mailbox API version */
+	msg[0] = IXGBE_VF_API_NEGOTIATE;
+	msg[1] = api;
+	msg[2] = 0;
+
+	err = ixgbevf_write_msg_read_ack(hw, msg, msg, ARRAY_SIZE(msg));
+	if (!err) {
+		msg[0] &= ~IXGBE_VT_MSGTYPE_CTS;
+
+		/* Store value and return 0 on success */
+		if (msg[0] == (IXGBE_VF_API_NEGOTIATE |
+			      IXGBE_VT_MSGTYPE_SUCCESS)) {
+			hw->api_version = api;
+			return 0;
+		}
+
+		err = IXGBE_ERR_INVALID_ARGUMENT;
+	}
+
+	return err;
+}
+
+/**
+ *  ixgbevf_hv_negotiate_api_version_vf - Negotiate supported API version
+ *  @hw: pointer to the HW structure
+ *  @api: integer containing requested API version
+ *  Hyper-V version - only ixgbe_mbox_api_10 supported.
+ **/
+static int ixgbevf_hv_negotiate_api_version_vf(struct ixgbe_hw *hw, int api)
+{
+	/* Hyper-V only supports api version ixgbe_mbox_api_10 */
+	if (api != ixgbe_mbox_api_10)
+		return IXGBE_ERR_INVALID_ARGUMENT;
+
+	return 0;
+}
+
+int ixgbevf_get_queues(struct ixgbe_hw *hw, unsigned int *num_tcs,
+		       unsigned int *default_tc)
+{
+	int err;
+	u32 msg[5];
+
+	/* do nothing if API doesn't support ixgbevf_get_queues */
+	switch (hw->api_version) {
+	case ixgbe_mbox_api_11:
+	case ixgbe_mbox_api_12:
+	case ixgbe_mbox_api_13:
+	case ixgbe_mbox_api_14:
+	case ixgbe_mbox_api_15:
+		break;
+	default:
+		return 0;
+	}
+
+	/* Fetch queue configuration from the PF */
+	msg[0] = IXGBE_VF_GET_QUEUE;
+	msg[1] = msg[2] = msg[3] = msg[4] = 0;
+
+	err = ixgbevf_write_msg_read_ack(hw, msg, msg, ARRAY_SIZE(msg));
+	if (!err) {
+		msg[0] &= ~IXGBE_VT_MSGTYPE_CTS;
+
+		/* if we didn't get an ACK there must have been
+		 * some sort of mailbox error so we should treat it
+		 * as such
+		 */
+		if (msg[0] != (IXGBE_VF_GET_QUEUE | IXGBE_VT_MSGTYPE_SUCCESS))
+			return IXGBE_ERR_MBX;
+
+		/* record and validate values from message */
+		hw->mac.max_tx_queues = msg[IXGBE_VF_TX_QUEUES];
+		if (hw->mac.max_tx_queues == 0 ||
+		    hw->mac.max_tx_queues > IXGBE_VF_MAX_TX_QUEUES)
+			hw->mac.max_tx_queues = IXGBE_VF_MAX_TX_QUEUES;
+
+		hw->mac.max_rx_queues = msg[IXGBE_VF_RX_QUEUES];
+		if (hw->mac.max_rx_queues == 0 ||
+		    hw->mac.max_rx_queues > IXGBE_VF_MAX_RX_QUEUES)
+			hw->mac.max_rx_queues = IXGBE_VF_MAX_RX_QUEUES;
+
+		*num_tcs = msg[IXGBE_VF_TRANS_VLAN];
+		/* in case of unknown state assume we cannot tag frames */
+		if (*num_tcs > hw->mac.max_rx_queues)
+			*num_tcs = 1;
+
+		*default_tc = msg[IXGBE_VF_DEF_QUEUE];
+		/* default to queue 0 on out-of-bounds queue number */
+		if (*default_tc >= hw->mac.max_tx_queues)
+			*default_tc = 0;
+	}
+
+	return err;
+}
+
+static const 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,
+	.negotiate_api_version	= ixgbevf_negotiate_api_version_vf,
+	.set_rar		= ixgbevf_set_rar_vf,
+	.update_mc_addr_list	= ixgbevf_update_mc_addr_list_vf,
+	.update_xcast_mode	= ixgbevf_update_xcast_mode,
+	.get_link_state		= ixgbevf_get_link_state_vf,
+	.set_uc_addr		= ixgbevf_set_uc_addr_vf,
+	.set_vfta		= ixgbevf_set_vfta_vf,
+	.set_rlpml		= ixgbevf_set_rlpml_vf,
+};
+
+static const struct ixgbe_mac_operations ixgbevf_hv_mac_ops = {
+	.init_hw		= ixgbevf_init_hw_vf,
+	.reset_hw		= ixgbevf_hv_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_hv_check_mac_link_vf,
+	.negotiate_api_version	= ixgbevf_hv_negotiate_api_version_vf,
+	.set_rar		= ixgbevf_hv_set_rar_vf,
+	.update_mc_addr_list	= ixgbevf_hv_update_mc_addr_list_vf,
+	.update_xcast_mode	= ixgbevf_hv_update_xcast_mode,
+	.get_link_state		= ixgbevf_hv_get_link_state_vf,
+	.set_uc_addr		= ixgbevf_hv_set_uc_addr_vf,
+	.set_vfta		= ixgbevf_hv_set_vfta_vf,
+	.set_rlpml		= ixgbevf_hv_set_rlpml_vf,
+};
+
+const struct ixgbevf_info ixgbevf_82599_vf_info = {
+	.mac = ixgbe_mac_82599_vf,
+	.mac_ops = &ixgbevf_mac_ops,
+};
+
+const struct ixgbevf_info ixgbevf_82599_vf_hv_info = {
+	.mac = ixgbe_mac_82599_vf,
+	.mac_ops = &ixgbevf_hv_mac_ops,
+};
+
+const struct ixgbevf_info ixgbevf_X540_vf_info = {
+	.mac = ixgbe_mac_X540_vf,
+	.mac_ops = &ixgbevf_mac_ops,
+};
+
+const struct ixgbevf_info ixgbevf_X540_vf_hv_info = {
+	.mac = ixgbe_mac_X540_vf,
+	.mac_ops = &ixgbevf_hv_mac_ops,
+};
+
+const struct ixgbevf_info ixgbevf_X550_vf_info = {
+	.mac = ixgbe_mac_X550_vf,
+	.mac_ops = &ixgbevf_mac_ops,
+};
+
+const struct ixgbevf_info ixgbevf_X550_vf_hv_info = {
+	.mac = ixgbe_mac_X550_vf,
+	.mac_ops = &ixgbevf_hv_mac_ops,
+};
+
+const struct ixgbevf_info ixgbevf_X550EM_x_vf_info = {
+	.mac = ixgbe_mac_X550EM_x_vf,
+	.mac_ops = &ixgbevf_mac_ops,
+};
+
+const struct ixgbevf_info ixgbevf_X550EM_x_vf_hv_info = {
+	.mac = ixgbe_mac_X550EM_x_vf,
+	.mac_ops = &ixgbevf_hv_mac_ops,
+};
+
+const struct ixgbevf_info ixgbevf_x550em_a_vf_info = {
+	.mac = ixgbe_mac_x550em_a_vf,
+	.mac_ops = &ixgbevf_mac_ops,
+};