drivers/net/ethernet/intel/i40evf/i40e_virtchnl.h - maze/linux - Git at Google

 /*******************************************************************************
  *
  * Intel Ethernet Controller XL710 Family Linux Virtual Function Driver
  * Copyright(c) 2013 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.
  *
  * 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
  *
  ******************************************************************************/

 #ifndef _I40E_VIRTCHNL_H_
 #define _I40E_VIRTCHNL_H_

 #include "i40e_type.h"

 /* Description:
  * This header file describes the VF-PF communication protocol used
  * by the various i40e drivers.
  *
  * Admin queue buffer usage:
  * desc->opcode is always i40e_aqc_opc_send_msg_to_pf
  * flags, retval, datalen, and data addr are all used normally.
  * Firmware copies the cookie fields when sending messages between the PF and
  * VF, but uses all other fields internally. Due to this limitation, we
  * must send all messages as "indirect", i.e. using an external buffer.
  *
  * All the vsi indexes are relative to the VF. Each VF can have maximum of
  * three VSIs. All the queue indexes are relative to the VSI.  Each VF can
  * have a maximum of sixteen queues for all of its VSIs.
  *
  * The PF is required to return a status code in v_retval for all messages
  * except RESET_VF, which does not require any response. The return value is of
  * i40e_status_code type, defined in the i40e_type.h.
  *
  * In general, VF driver initialization should roughly follow the order of these
  * opcodes. The VF driver must first validate the API version of the PF driver,
  * then request a reset, then get resources, then configure queues and
  * interrupts. After these operations are complete, the VF driver may start
  * its queues, optionally add MAC and VLAN filters, and process traffic.
  */

 /* Opcodes for VF-PF communication. These are placed in the v_opcode field
  * of the virtchnl_msg structure.
  */
 enum i40e_virtchnl_ops {
 /* VF sends req. to pf for the following
  * ops.
  */
 	I40E_VIRTCHNL_OP_UNKNOWN = 0,
 	I40E_VIRTCHNL_OP_VERSION = 1, /* must ALWAYS be 1 */
 	I40E_VIRTCHNL_OP_RESET_VF,
 	I40E_VIRTCHNL_OP_GET_VF_RESOURCES,
 	I40E_VIRTCHNL_OP_CONFIG_TX_QUEUE,
 	I40E_VIRTCHNL_OP_CONFIG_RX_QUEUE,
 	I40E_VIRTCHNL_OP_CONFIG_VSI_QUEUES,
 	I40E_VIRTCHNL_OP_CONFIG_IRQ_MAP,
 	I40E_VIRTCHNL_OP_ENABLE_QUEUES,
 	I40E_VIRTCHNL_OP_DISABLE_QUEUES,
 	I40E_VIRTCHNL_OP_ADD_ETHER_ADDRESS,
 	I40E_VIRTCHNL_OP_DEL_ETHER_ADDRESS,
 	I40E_VIRTCHNL_OP_ADD_VLAN,
 	I40E_VIRTCHNL_OP_DEL_VLAN,
 	I40E_VIRTCHNL_OP_CONFIG_PROMISCUOUS_MODE,
 	I40E_VIRTCHNL_OP_GET_STATS,
 	I40E_VIRTCHNL_OP_FCOE,
 /* PF sends status change events to vfs using
  * the following op.
  */
 	I40E_VIRTCHNL_OP_EVENT,
 };

 /* Virtual channel message descriptor. This overlays the admin queue
  * descriptor. All other data is passed in external buffers.
  */

 struct i40e_virtchnl_msg {
 	u8 pad[8];			 /* AQ flags/opcode/len/retval fields */
 	enum i40e_virtchnl_ops v_opcode; /* avoid confusion with desc->opcode */
 	i40e_status v_retval;  /* ditto for desc->retval */
 	u32 vfid;			 /* used by PF when sending to VF */
 };

 /* Message descriptions and data structures.*/

 /* I40E_VIRTCHNL_OP_VERSION
  * VF posts its version number to the PF. PF responds with its version number
  * in the same format, along with a return code.
  * Reply from PF has its major/minor versions also in param0 and param1.
  * If there is a major version mismatch, then the VF cannot operate.
  * If there is a minor version mismatch, then the VF can operate but should
  * add a warning to the system log.
  *
  * This enum element MUST always be specified as == 1, regardless of other
  * changes in the API. The PF must always respond to this message without
  * error regardless of version mismatch.
  */
 #define I40E_VIRTCHNL_VERSION_MAJOR		1
 #define I40E_VIRTCHNL_VERSION_MINOR		0
 struct i40e_virtchnl_version_info {
 	u32 major;
 	u32 minor;
 };

 /* I40E_VIRTCHNL_OP_RESET_VF
  * VF sends this request to PF with no parameters
  * PF does NOT respond! VF driver must delay then poll VFGEN_RSTAT register
  * until reset completion is indicated. The admin queue must be reinitialized
  * after this operation.
  *
  * When reset is complete, PF must ensure that all queues in all VSIs associated
  * with the VF are stopped, all queue configurations in the HMC are set to 0,
  * and all MAC and VLAN filters (except the default MAC address) on all VSIs
  * are cleared.
  */

 /* I40E_VIRTCHNL_OP_GET_VF_RESOURCES
  * VF sends this request to PF with no parameters
  * PF responds with an indirect message containing
  * i40e_virtchnl_vf_resource and one or more
  * i40e_virtchnl_vsi_resource structures.
  */

 struct i40e_virtchnl_vsi_resource {
 	u16 vsi_id;
 	u16 num_queue_pairs;
 	enum i40e_vsi_type vsi_type;
 	u16 qset_handle;
 	u8 default_mac_addr[ETH_ALEN];
 };
 /* VF offload flags */
 #define I40E_VIRTCHNL_VF_OFFLOAD_L2	0x00000001
 #define I40E_VIRTCHNL_VF_OFFLOAD_FCOE	0x00000004
 #define I40E_VIRTCHNL_VF_OFFLOAD_VLAN	0x00010000

 struct i40e_virtchnl_vf_resource {
 	u16 num_vsis;
 	u16 num_queue_pairs;
 	u16 max_vectors;
 	u16 max_mtu;

 	u32 vf_offload_flags;
 	u32 max_fcoe_contexts;
 	u32 max_fcoe_filters;

 	struct i40e_virtchnl_vsi_resource vsi_res[1];
 };

 /* I40E_VIRTCHNL_OP_CONFIG_TX_QUEUE
  * VF sends this message to set up parameters for one TX queue.
  * External data buffer contains one instance of i40e_virtchnl_txq_info.
  * PF configures requested queue and returns a status code.
  */

 /* Tx queue config info */
 struct i40e_virtchnl_txq_info {
 	u16 vsi_id;
 	u16 queue_id;
 	u16 ring_len;		/* number of descriptors, multiple of 8 */
 	u16 headwb_enabled;
 	u64 dma_ring_addr;
 	u64 dma_headwb_addr;
 };

 /* I40E_VIRTCHNL_OP_CONFIG_RX_QUEUE
  * VF sends this message to set up parameters for one RX queue.
  * External data buffer contains one instance of i40e_virtchnl_rxq_info.
  * PF configures requested queue and returns a status code.
  */

 /* Rx queue config info */
 struct i40e_virtchnl_rxq_info {
 	u16 vsi_id;
 	u16 queue_id;
 	u32 ring_len;		/* number of descriptors, multiple of 32 */
 	u16 hdr_size;
 	u16 splithdr_enabled;
 	u32 databuffer_size;
 	u32 max_pkt_size;
 	u64 dma_ring_addr;
 	enum i40e_hmc_obj_rx_hsplit_0 rx_split_pos;
 };

 /* I40E_VIRTCHNL_OP_CONFIG_VSI_QUEUES
  * VF sends this message to set parameters for all active TX and RX queues
  * associated with the specified VSI.
  * PF configures queues and returns status.
  * If the number of queues specified is greater than the number of queues
  * associated with the VSI, an error is returned and no queues are configured.
  */
 struct i40e_virtchnl_queue_pair_info {
 	/* NOTE: vsi_id and queue_id should be identical for both queues. */
 	struct i40e_virtchnl_txq_info txq;
 	struct i40e_virtchnl_rxq_info rxq;
 };

 struct i40e_virtchnl_vsi_queue_config_info {
 	u16 vsi_id;
 	u16 num_queue_pairs;
 	struct i40e_virtchnl_queue_pair_info qpair[1];
 };

 /* I40E_VIRTCHNL_OP_CONFIG_IRQ_MAP
  * VF uses this message to map vectors to queues.
  * The rxq_map and txq_map fields are bitmaps used to indicate which queues
  * are to be associated with the specified vector.
  * The "other" causes are always mapped to vector 0.
  * PF configures interrupt mapping and returns status.
  */
 struct i40e_virtchnl_vector_map {
 	u16 vsi_id;
 	u16 vector_id;
 	u16 rxq_map;
 	u16 txq_map;
 	u16 rxitr_idx;
 	u16 txitr_idx;
 };

 struct i40e_virtchnl_irq_map_info {
 	u16 num_vectors;
 	struct i40e_virtchnl_vector_map vecmap[1];
 };

 /* I40E_VIRTCHNL_OP_ENABLE_QUEUES
  * I40E_VIRTCHNL_OP_DISABLE_QUEUES
  * VF sends these message to enable or disable TX/RX queue pairs.
  * The queues fields are bitmaps indicating which queues to act upon.
  * (Currently, we only support 16 queues per VF, but we make the field
  * u32 to allow for expansion.)
  * PF performs requested action and returns status.
  */
 struct i40e_virtchnl_queue_select {
 	u16 vsi_id;
 	u16 pad;
 	u32 rx_queues;
 	u32 tx_queues;
 };

 /* I40E_VIRTCHNL_OP_ADD_ETHER_ADDRESS
  * VF sends this message in order to add one or more unicast or multicast
  * address filters for the specified VSI.
  * PF adds the filters and returns status.
  */

 /* I40E_VIRTCHNL_OP_DEL_ETHER_ADDRESS
  * VF sends this message in order to remove one or more unicast or multicast
  * filters for the specified VSI.
  * PF removes the filters and returns status.
  */

 struct i40e_virtchnl_ether_addr {
 	u8 addr[ETH_ALEN];
 	u8 pad[2];
 };

 struct i40e_virtchnl_ether_addr_list {
 	u16 vsi_id;
 	u16 num_elements;
 	struct i40e_virtchnl_ether_addr list[1];
 };

 /* I40E_VIRTCHNL_OP_ADD_VLAN
  * VF sends this message to add one or more VLAN tag filters for receives.
  * PF adds the filters and returns status.
  * If a port VLAN is configured by the PF, this operation will return an
  * error to the VF.
  */

 /* I40E_VIRTCHNL_OP_DEL_VLAN
  * VF sends this message to remove one or more VLAN tag filters for receives.
  * PF removes the filters and returns status.
  * If a port VLAN is configured by the PF, this operation will return an
  * error to the VF.
  */

 struct i40e_virtchnl_vlan_filter_list {
 	u16 vsi_id;
 	u16 num_elements;
 	u16 vlan_id[1];
 };

 /* I40E_VIRTCHNL_OP_CONFIG_PROMISCUOUS_MODE
  * VF sends VSI id and flags.
  * PF returns status code in retval.
  * Note: we assume that broadcast accept mode is always enabled.
  */
 struct i40e_virtchnl_promisc_info {
 	u16 vsi_id;
 	u16 flags;
 };

 #define I40E_FLAG_VF_UNICAST_PROMISC	0x00000001
 #define I40E_FLAG_VF_MULTICAST_PROMISC	0x00000002

 /* I40E_VIRTCHNL_OP_GET_STATS
  * VF sends this message to request stats for the selected VSI. VF uses
  * the i40e_virtchnl_queue_select struct to specify the VSI. The queue_id
  * field is ignored by the PF.
  *
  * PF replies with struct i40e_eth_stats in an external buffer.
  */

 /* I40E_VIRTCHNL_OP_EVENT
  * PF sends this message to inform the VF driver of events that may affect it.
  * No direct response is expected from the VF, though it may generate other
  * messages in response to this one.
  */
 enum i40e_virtchnl_event_codes {
 	I40E_VIRTCHNL_EVENT_UNKNOWN = 0,
 	I40E_VIRTCHNL_EVENT_LINK_CHANGE,
 	I40E_VIRTCHNL_EVENT_RESET_IMPENDING,
 	I40E_VIRTCHNL_EVENT_PF_DRIVER_CLOSE,
 };
 #define I40E_PF_EVENT_SEVERITY_INFO		0
 #define I40E_PF_EVENT_SEVERITY_CERTAIN_DOOM	255

 struct i40e_virtchnl_pf_event {
 	enum i40e_virtchnl_event_codes event;
 	union {
 		struct {
 			enum i40e_aq_link_speed link_speed;
 			bool link_status;
 		} link_event;
 	} event_data;

 	int severity;
 };

 /* The following are TBD, not necessary for LAN functionality.
  * I40E_VIRTCHNL_OP_FCOE
  */

 /* VF reset states - these are written into the RSTAT register:
  * I40E_VFGEN_RSTAT1 on the PF
  * I40E_VFGEN_RSTAT on the VF
  * When the PF initiates a reset, it writes 0
  * When the reset is complete, it writes 1
  * When the PF detects that the VF has recovered, it writes 2
  * VF checks this register periodically to determine if a reset has occurred,
  * then polls it to know when the reset is complete.
  * If either the PF or VF reads the register while the hardware
  * is in a reset state, it will return DEADBEEF, which, when masked
  * will result in 3.
  */
 enum i40e_vfr_states {
 	I40E_VFR_INPROGRESS = 0,
 	I40E_VFR_COMPLETED,
 	I40E_VFR_VFACTIVE,
 	I40E_VFR_UNKNOWN,
 };

 #endif /* _I40E_VIRTCHNL_H_ */
	/*******************************************************************************
	*
	* Intel Ethernet Controller XL710 Family Linux Virtual Function Driver
	* Copyright(c) 2013 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.
	*
	* 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
	*
	******************************************************************************/

	#ifndef _I40E_VIRTCHNL_H_
	#define _I40E_VIRTCHNL_H_

	#include "i40e_type.h"

	/* Description:
	* This header file describes the VF-PF communication protocol used
	* by the various i40e drivers.
	*
	* Admin queue buffer usage:
	* desc->opcode is always i40e_aqc_opc_send_msg_to_pf
	* flags, retval, datalen, and data addr are all used normally.
	* Firmware copies the cookie fields when sending messages between the PF and
	* VF, but uses all other fields internally. Due to this limitation, we
	* must send all messages as "indirect", i.e. using an external buffer.
	*
	* All the vsi indexes are relative to the VF. Each VF can have maximum of
	* three VSIs. All the queue indexes are relative to the VSI. Each VF can
	* have a maximum of sixteen queues for all of its VSIs.
	*
	* The PF is required to return a status code in v_retval for all messages
	* except RESET_VF, which does not require any response. The return value is of
	* i40e_status_code type, defined in the i40e_type.h.
	*
	* In general, VF driver initialization should roughly follow the order of these
	* opcodes. The VF driver must first validate the API version of the PF driver,
	* then request a reset, then get resources, then configure queues and
	* interrupts. After these operations are complete, the VF driver may start
	* its queues, optionally add MAC and VLAN filters, and process traffic.
	*/

	/* Opcodes for VF-PF communication. These are placed in the v_opcode field
	* of the virtchnl_msg structure.
	*/
	enum i40e_virtchnl_ops {
	/* VF sends req. to pf for the following
	* ops.
	*/
	I40E_VIRTCHNL_OP_UNKNOWN = 0,
	I40E_VIRTCHNL_OP_VERSION = 1, /* must ALWAYS be 1 */
	I40E_VIRTCHNL_OP_RESET_VF,
	I40E_VIRTCHNL_OP_GET_VF_RESOURCES,
	I40E_VIRTCHNL_OP_CONFIG_TX_QUEUE,
	I40E_VIRTCHNL_OP_CONFIG_RX_QUEUE,
	I40E_VIRTCHNL_OP_CONFIG_VSI_QUEUES,
	I40E_VIRTCHNL_OP_CONFIG_IRQ_MAP,
	I40E_VIRTCHNL_OP_ENABLE_QUEUES,
	I40E_VIRTCHNL_OP_DISABLE_QUEUES,
	I40E_VIRTCHNL_OP_ADD_ETHER_ADDRESS,
	I40E_VIRTCHNL_OP_DEL_ETHER_ADDRESS,
	I40E_VIRTCHNL_OP_ADD_VLAN,
	I40E_VIRTCHNL_OP_DEL_VLAN,
	I40E_VIRTCHNL_OP_CONFIG_PROMISCUOUS_MODE,
	I40E_VIRTCHNL_OP_GET_STATS,
	I40E_VIRTCHNL_OP_FCOE,
	/* PF sends status change events to vfs using
	* the following op.
	*/
	I40E_VIRTCHNL_OP_EVENT,
	};

	/* Virtual channel message descriptor. This overlays the admin queue
	* descriptor. All other data is passed in external buffers.
	*/

	struct i40e_virtchnl_msg {
	u8 pad[8]; /* AQ flags/opcode/len/retval fields */
	enum i40e_virtchnl_ops v_opcode; /* avoid confusion with desc->opcode */
	i40e_status v_retval; /* ditto for desc->retval */
	u32 vfid; /* used by PF when sending to VF */
	};

	/* Message descriptions and data structures.*/

	/* I40E_VIRTCHNL_OP_VERSION
	* VF posts its version number to the PF. PF responds with its version number
	* in the same format, along with a return code.
	* Reply from PF has its major/minor versions also in param0 and param1.
	* If there is a major version mismatch, then the VF cannot operate.
	* If there is a minor version mismatch, then the VF can operate but should
	* add a warning to the system log.
	*
	* This enum element MUST always be specified as == 1, regardless of other
	* changes in the API. The PF must always respond to this message without
	* error regardless of version mismatch.
	*/
	#define I40E_VIRTCHNL_VERSION_MAJOR 1
	#define I40E_VIRTCHNL_VERSION_MINOR 0
	struct i40e_virtchnl_version_info {
	u32 major;
	u32 minor;
	};

	/* I40E_VIRTCHNL_OP_RESET_VF
	* VF sends this request to PF with no parameters
	* PF does NOT respond! VF driver must delay then poll VFGEN_RSTAT register
	* until reset completion is indicated. The admin queue must be reinitialized
	* after this operation.
	*
	* When reset is complete, PF must ensure that all queues in all VSIs associated
	* with the VF are stopped, all queue configurations in the HMC are set to 0,
	* and all MAC and VLAN filters (except the default MAC address) on all VSIs
	* are cleared.
	*/

	/* I40E_VIRTCHNL_OP_GET_VF_RESOURCES
	* VF sends this request to PF with no parameters
	* PF responds with an indirect message containing
	* i40e_virtchnl_vf_resource and one or more
	* i40e_virtchnl_vsi_resource structures.
	*/

	struct i40e_virtchnl_vsi_resource {
	u16 vsi_id;
	u16 num_queue_pairs;
	enum i40e_vsi_type vsi_type;
	u16 qset_handle;
	u8 default_mac_addr[ETH_ALEN];
	};
	/* VF offload flags */
	#define I40E_VIRTCHNL_VF_OFFLOAD_L2 0x00000001
	#define I40E_VIRTCHNL_VF_OFFLOAD_FCOE 0x00000004
	#define I40E_VIRTCHNL_VF_OFFLOAD_VLAN 0x00010000

	struct i40e_virtchnl_vf_resource {
	u16 num_vsis;
	u16 num_queue_pairs;
	u16 max_vectors;
	u16 max_mtu;

	u32 vf_offload_flags;
	u32 max_fcoe_contexts;
	u32 max_fcoe_filters;

	struct i40e_virtchnl_vsi_resource vsi_res[1];
	};

	/* I40E_VIRTCHNL_OP_CONFIG_TX_QUEUE
	* VF sends this message to set up parameters for one TX queue.
	* External data buffer contains one instance of i40e_virtchnl_txq_info.
	* PF configures requested queue and returns a status code.
	*/

	/* Tx queue config info */
	struct i40e_virtchnl_txq_info {
	u16 vsi_id;
	u16 queue_id;
	u16 ring_len; /* number of descriptors, multiple of 8 */
	u16 headwb_enabled;
	u64 dma_ring_addr;
	u64 dma_headwb_addr;
	};

	/* I40E_VIRTCHNL_OP_CONFIG_RX_QUEUE
	* VF sends this message to set up parameters for one RX queue.
	* External data buffer contains one instance of i40e_virtchnl_rxq_info.
	* PF configures requested queue and returns a status code.
	*/

	/* Rx queue config info */
	struct i40e_virtchnl_rxq_info {
	u16 vsi_id;
	u16 queue_id;
	u32 ring_len; /* number of descriptors, multiple of 32 */
	u16 hdr_size;
	u16 splithdr_enabled;
	u32 databuffer_size;
	u32 max_pkt_size;
	u64 dma_ring_addr;
	enum i40e_hmc_obj_rx_hsplit_0 rx_split_pos;
	};

	/* I40E_VIRTCHNL_OP_CONFIG_VSI_QUEUES
	* VF sends this message to set parameters for all active TX and RX queues
	* associated with the specified VSI.
	* PF configures queues and returns status.
	* If the number of queues specified is greater than the number of queues
	* associated with the VSI, an error is returned and no queues are configured.
	*/
	struct i40e_virtchnl_queue_pair_info {
	/* NOTE: vsi_id and queue_id should be identical for both queues. */
	struct i40e_virtchnl_txq_info txq;
	struct i40e_virtchnl_rxq_info rxq;
	};

	struct i40e_virtchnl_vsi_queue_config_info {
	u16 vsi_id;
	u16 num_queue_pairs;
	struct i40e_virtchnl_queue_pair_info qpair[1];
	};

	/* I40E_VIRTCHNL_OP_CONFIG_IRQ_MAP
	* VF uses this message to map vectors to queues.
	* The rxq_map and txq_map fields are bitmaps used to indicate which queues
	* are to be associated with the specified vector.
	* The "other" causes are always mapped to vector 0.
	* PF configures interrupt mapping and returns status.
	*/
	struct i40e_virtchnl_vector_map {
	u16 vsi_id;
	u16 vector_id;
	u16 rxq_map;
	u16 txq_map;
	u16 rxitr_idx;
	u16 txitr_idx;
	};

	struct i40e_virtchnl_irq_map_info {
	u16 num_vectors;
	struct i40e_virtchnl_vector_map vecmap[1];
	};

	/* I40E_VIRTCHNL_OP_ENABLE_QUEUES
	* I40E_VIRTCHNL_OP_DISABLE_QUEUES
	* VF sends these message to enable or disable TX/RX queue pairs.
	* The queues fields are bitmaps indicating which queues to act upon.
	* (Currently, we only support 16 queues per VF, but we make the field
	* u32 to allow for expansion.)
	* PF performs requested action and returns status.
	*/
	struct i40e_virtchnl_queue_select {
	u16 vsi_id;
	u16 pad;
	u32 rx_queues;
	u32 tx_queues;
	};

	/* I40E_VIRTCHNL_OP_ADD_ETHER_ADDRESS
	* VF sends this message in order to add one or more unicast or multicast
	* address filters for the specified VSI.
	* PF adds the filters and returns status.
	*/

	/* I40E_VIRTCHNL_OP_DEL_ETHER_ADDRESS
	* VF sends this message in order to remove one or more unicast or multicast
	* filters for the specified VSI.
	* PF removes the filters and returns status.
	*/

	struct i40e_virtchnl_ether_addr {
	u8 addr[ETH_ALEN];
	u8 pad[2];
	};

	struct i40e_virtchnl_ether_addr_list {
	u16 vsi_id;
	u16 num_elements;
	struct i40e_virtchnl_ether_addr list[1];
	};

	/* I40E_VIRTCHNL_OP_ADD_VLAN
	* VF sends this message to add one or more VLAN tag filters for receives.
	* PF adds the filters and returns status.
	* If a port VLAN is configured by the PF, this operation will return an
	* error to the VF.
	*/

	/* I40E_VIRTCHNL_OP_DEL_VLAN
	* VF sends this message to remove one or more VLAN tag filters for receives.
	* PF removes the filters and returns status.
	* If a port VLAN is configured by the PF, this operation will return an
	* error to the VF.
	*/

	struct i40e_virtchnl_vlan_filter_list {
	u16 vsi_id;
	u16 num_elements;
	u16 vlan_id[1];
	};

	/* I40E_VIRTCHNL_OP_CONFIG_PROMISCUOUS_MODE
	* VF sends VSI id and flags.
	* PF returns status code in retval.
	* Note: we assume that broadcast accept mode is always enabled.
	*/
	struct i40e_virtchnl_promisc_info {
	u16 vsi_id;
	u16 flags;
	};

	#define I40E_FLAG_VF_UNICAST_PROMISC 0x00000001
	#define I40E_FLAG_VF_MULTICAST_PROMISC 0x00000002

	/* I40E_VIRTCHNL_OP_GET_STATS
	* VF sends this message to request stats for the selected VSI. VF uses
	* the i40e_virtchnl_queue_select struct to specify the VSI. The queue_id
	* field is ignored by the PF.
	*
	* PF replies with struct i40e_eth_stats in an external buffer.
	*/

	/* I40E_VIRTCHNL_OP_EVENT
	* PF sends this message to inform the VF driver of events that may affect it.
	* No direct response is expected from the VF, though it may generate other
	* messages in response to this one.
	*/
	enum i40e_virtchnl_event_codes {
	I40E_VIRTCHNL_EVENT_UNKNOWN = 0,
	I40E_VIRTCHNL_EVENT_LINK_CHANGE,
	I40E_VIRTCHNL_EVENT_RESET_IMPENDING,
	I40E_VIRTCHNL_EVENT_PF_DRIVER_CLOSE,
	};
	#define I40E_PF_EVENT_SEVERITY_INFO 0
	#define I40E_PF_EVENT_SEVERITY_CERTAIN_DOOM 255

	struct i40e_virtchnl_pf_event {
	enum i40e_virtchnl_event_codes event;
	union {
	struct {
	enum i40e_aq_link_speed link_speed;
	bool link_status;
	} link_event;
	} event_data;

	int severity;
	};

	/* The following are TBD, not necessary for LAN functionality.
	* I40E_VIRTCHNL_OP_FCOE
	*/

	/* VF reset states - these are written into the RSTAT register:
	* I40E_VFGEN_RSTAT1 on the PF
	* I40E_VFGEN_RSTAT on the VF
	* When the PF initiates a reset, it writes 0
	* When the reset is complete, it writes 1
	* When the PF detects that the VF has recovered, it writes 2
	* VF checks this register periodically to determine if a reset has occurred,
	* then polls it to know when the reset is complete.
	* If either the PF or VF reads the register while the hardware
	* is in a reset state, it will return DEADBEEF, which, when masked
	* will result in 3.
	*/
	enum i40e_vfr_states {
	I40E_VFR_INPROGRESS = 0,
	I40E_VFR_COMPLETED,
	I40E_VFR_VFACTIVE,
	I40E_VFR_UNKNOWN,
	};

	#endif /* _I40E_VIRTCHNL_H_ */