/*******************************************************************************
*
* Intel Ethernet Controller XL710 Family Linux Driver
* Copyright(c) 2013 - 2014 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, see .
*
* The full GNU General Public License is included in this distribution in
* the file called "COPYING".
*
* Contact Information:
* e1000-devel Mailing List
* 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;
};
/* 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_ */