path: root/src/spdk/dpdk/drivers/net/i40e/base/virtchnl.h

/*******************************************************************************

Copyright (c) 2013 - 2015, Intel Corporation
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

 1. Redistributions of source code must retain the above copyright notice,
    this list of conditions and the following disclaimer.

 2. Redistributions in binary form must reproduce the above copyright
    notice, this list of conditions and the following disclaimer in the
    documentation and/or other materials provided with the distribution.

 3. Neither the name of the Intel Corporation nor the names of its
    contributors may be used to endorse or promote products derived from
    this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.

***************************************************************************/

#ifndef _VIRTCHNL_H_
#define _VIRTCHNL_H_

/* Description:
 * This header file describes the VF-PF communication protocol used
 * by the drivers for all devices starting from our 40G product line
 *
 * Admin queue buffer usage:
 * desc->opcode is always aqc_opc_send_msg_to_pf
 * flags, retval, datalen, and data addr are all used normally.
 * The 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 status_code type, defined in the shared 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.
 */

/* START GENERIC DEFINES
 * Need to ensure the following enums and defines hold the same meaning and
 * value in current and future projects
 */

/* Error Codes */
enum virtchnl_status_code {
	VIRTCHNL_STATUS_SUCCESS				= 0,
	VIRTCHNL_ERR_PARAM				= -5,
	VIRTCHNL_STATUS_ERR_OPCODE_MISMATCH		= -38,
	VIRTCHNL_STATUS_ERR_CQP_COMPL_ERROR		= -39,
	VIRTCHNL_STATUS_ERR_INVALID_VF_ID		= -40,
	VIRTCHNL_STATUS_NOT_SUPPORTED			= -64,
};

#define VIRTCHNL_LINK_SPEED_100MB_SHIFT		0x1
#define VIRTCHNL_LINK_SPEED_1000MB_SHIFT	0x2
#define VIRTCHNL_LINK_SPEED_10GB_SHIFT		0x3
#define VIRTCHNL_LINK_SPEED_40GB_SHIFT		0x4
#define VIRTCHNL_LINK_SPEED_20GB_SHIFT		0x5
#define VIRTCHNL_LINK_SPEED_25GB_SHIFT		0x6

enum virtchnl_link_speed {
	VIRTCHNL_LINK_SPEED_UNKNOWN	= 0,
	VIRTCHNL_LINK_SPEED_100MB	= BIT(VIRTCHNL_LINK_SPEED_100MB_SHIFT),
	VIRTCHNL_LINK_SPEED_1GB		= BIT(VIRTCHNL_LINK_SPEED_1000MB_SHIFT),
	VIRTCHNL_LINK_SPEED_10GB	= BIT(VIRTCHNL_LINK_SPEED_10GB_SHIFT),
	VIRTCHNL_LINK_SPEED_40GB	= BIT(VIRTCHNL_LINK_SPEED_40GB_SHIFT),
	VIRTCHNL_LINK_SPEED_20GB	= BIT(VIRTCHNL_LINK_SPEED_20GB_SHIFT),
	VIRTCHNL_LINK_SPEED_25GB	= BIT(VIRTCHNL_LINK_SPEED_25GB_SHIFT),
};

/* for hsplit_0 field of Rx HMC context */
/* deprecated with AVF 1.0 */
enum virtchnl_rx_hsplit {
	VIRTCHNL_RX_HSPLIT_NO_SPLIT      = 0,
	VIRTCHNL_RX_HSPLIT_SPLIT_L2      = 1,
	VIRTCHNL_RX_HSPLIT_SPLIT_IP      = 2,
	VIRTCHNL_RX_HSPLIT_SPLIT_TCP_UDP = 4,
	VIRTCHNL_RX_HSPLIT_SPLIT_SCTP    = 8,
};

#define VIRTCHNL_ETH_LENGTH_OF_ADDRESS	6
/* END GENERIC DEFINES */

/* Opcodes for VF-PF communication. These are placed in the v_opcode field
 * of the virtchnl_msg structure.
 */
enum virtchnl_ops {
/* The PF sends status change events to VFs using
 * the VIRTCHNL_OP_EVENT opcode.
 * VFs send requests to the PF using the other ops.
 * Use of "advanced opcode" features must be negotiated as part of capabilities
 * exchange and are not considered part of base mode feature set.
 */
	VIRTCHNL_OP_UNKNOWN = 0,
	VIRTCHNL_OP_VERSION = 1, /* must ALWAYS be 1 */
	VIRTCHNL_OP_RESET_VF = 2,
	VIRTCHNL_OP_GET_VF_RESOURCES = 3,
	VIRTCHNL_OP_CONFIG_TX_QUEUE = 4,
	VIRTCHNL_OP_CONFIG_RX_QUEUE = 5,
	VIRTCHNL_OP_CONFIG_VSI_QUEUES = 6,
	VIRTCHNL_OP_CONFIG_IRQ_MAP = 7,
	VIRTCHNL_OP_ENABLE_QUEUES = 8,
	VIRTCHNL_OP_DISABLE_QUEUES = 9,
	VIRTCHNL_OP_ADD_ETH_ADDR = 10,
	VIRTCHNL_OP_DEL_ETH_ADDR = 11,
	VIRTCHNL_OP_ADD_VLAN = 12,
	VIRTCHNL_OP_DEL_VLAN = 13,
	VIRTCHNL_OP_CONFIG_PROMISCUOUS_MODE = 14,
	VIRTCHNL_OP_GET_STATS = 15,
	VIRTCHNL_OP_RSVD = 16,
	VIRTCHNL_OP_EVENT = 17, /* must ALWAYS be 17 */
#ifdef VIRTCHNL_SOL_VF_SUPPORT
	VIRTCHNL_OP_GET_ADDNL_SOL_CONFIG = 19,
#endif
#ifdef VIRTCHNL_IWARP
	VIRTCHNL_OP_IWARP = 20, /* advanced opcode */
	VIRTCHNL_OP_CONFIG_IWARP_IRQ_MAP = 21, /* advanced opcode */
	VIRTCHNL_OP_RELEASE_IWARP_IRQ_MAP = 22, /* advanced opcode */
#endif
	VIRTCHNL_OP_CONFIG_RSS_KEY = 23,
	VIRTCHNL_OP_CONFIG_RSS_LUT = 24,
	VIRTCHNL_OP_GET_RSS_HENA_CAPS = 25,
	VIRTCHNL_OP_SET_RSS_HENA = 26,
	VIRTCHNL_OP_ENABLE_VLAN_STRIPPING = 27,
	VIRTCHNL_OP_DISABLE_VLAN_STRIPPING = 28,
	VIRTCHNL_OP_REQUEST_QUEUES = 29,

};

/* This macro is used to generate a compilation error if a structure
 * is not exactly the correct length. It gives a divide by zero error if the
 * structure is not of the correct size, otherwise it creates an enum that is
 * never used.
 */
#define VIRTCHNL_CHECK_STRUCT_LEN(n, X) enum virtchnl_static_assert_enum_##X \
	{virtchnl_static_assert_##X = (n) / ((sizeof(struct X) == (n)) ? 1 : 0)}

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

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

VIRTCHNL_CHECK_STRUCT_LEN(20, virtchnl_msg);

/* Message descriptions and data structures.*/

/* 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 VIRTCHNL_VERSION_MAJOR		1
#define VIRTCHNL_VERSION_MINOR		1
#define VIRTCHNL_VERSION_MINOR_NO_VF_CAPS	0

struct virtchnl_version_info {
	u32 major;
	u32 minor;
};

VIRTCHNL_CHECK_STRUCT_LEN(8, virtchnl_version_info);

#define VF_IS_V10(_v) (((_v)->major == 1) && ((_v)->minor == 0))
#define VF_IS_V11(_ver) (((_ver)->major == 1) && ((_ver)->minor == 1))

/* 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.
 */

/* VSI types that use VIRTCHNL interface for VF-PF communication. VSI_SRIOV
 * vsi_type should always be 6 for backward compatibility. Add other fields
 * as needed.
 */
enum virtchnl_vsi_type {
	VIRTCHNL_VSI_TYPE_INVALID = 0,
	VIRTCHNL_VSI_SRIOV = 6,
};

/* VIRTCHNL_OP_GET_VF_RESOURCES
 * Version 1.0 VF sends this request to PF with no parameters
 * Version 1.1 VF sends this request to PF with u32 bitmap of its capabilities
 * PF responds with an indirect message containing
 * virtchnl_vf_resource and one or more
 * virtchnl_vsi_resource structures.
 */

struct virtchnl_vsi_resource {
	u16 vsi_id;
	u16 num_queue_pairs;
	enum virtchnl_vsi_type vsi_type;
	u16 qset_handle;
	u8 default_mac_addr[VIRTCHNL_ETH_LENGTH_OF_ADDRESS];
};

VIRTCHNL_CHECK_STRUCT_LEN(16, virtchnl_vsi_resource);

/* VF capability flags
 * VIRTCHNL_VF_OFFLOAD_L2 flag is inclusive of base mode L2 offloads including
 * TX/RX Checksum offloading and TSO for non-tunnelled packets.
 */
#define VIRTCHNL_VF_OFFLOAD_L2			0x00000001
#define VIRTCHNL_VF_OFFLOAD_IWARP		0x00000002
#define VIRTCHNL_VF_OFFLOAD_RSVD		0x00000004
#define VIRTCHNL_VF_OFFLOAD_RSS_AQ		0x00000008
#define VIRTCHNL_VF_OFFLOAD_RSS_REG		0x00000010
#define VIRTCHNL_VF_OFFLOAD_WB_ON_ITR		0x00000020
#define VIRTCHNL_VF_OFFLOAD_REQ_QUEUES		0x00000040
#define VIRTCHNL_VF_OFFLOAD_VLAN		0x00010000
#define VIRTCHNL_VF_OFFLOAD_RX_POLLING		0x00020000
#define VIRTCHNL_VF_OFFLOAD_RSS_PCTYPE_V2	0x00040000
#define VIRTCHNL_VF_OFFLOAD_RSS_PF		0X00080000
#define VIRTCHNL_VF_OFFLOAD_ENCAP		0X00100000
#define VIRTCHNL_VF_OFFLOAD_ENCAP_CSUM		0X00200000
#define VIRTCHNL_VF_OFFLOAD_RX_ENCAP_CSUM	0X00400000

#define VF_BASE_MODE_OFFLOADS (VIRTCHNL_VF_OFFLOAD_L2 | \
			       VIRTCHNL_VF_OFFLOAD_VLAN | \
			       VIRTCHNL_VF_OFFLOAD_RSS_PF)

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

	u32 vf_cap_flags;
	u32 rss_key_size;
	u32 rss_lut_size;

	struct virtchnl_vsi_resource vsi_res[1];
};

VIRTCHNL_CHECK_STRUCT_LEN(36, virtchnl_vf_resource);

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

/* Tx queue config info */
struct virtchnl_txq_info {
	u16 vsi_id;
	u16 queue_id;
	u16 ring_len;		/* number of descriptors, multiple of 8 */
	u16 headwb_enabled; /* deprecated with AVF 1.0 */
	u64 dma_ring_addr;
	u64 dma_headwb_addr; /* deprecated with AVF 1.0 */
};

VIRTCHNL_CHECK_STRUCT_LEN(24, virtchnl_txq_info);

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

/* Rx queue config info */
struct virtchnl_rxq_info {
	u16 vsi_id;
	u16 queue_id;
	u32 ring_len;		/* number of descriptors, multiple of 32 */
	u16 hdr_size;
	u16 splithdr_enabled; /* deprecated with AVF 1.0 */
	u32 databuffer_size;
	u32 max_pkt_size;
	u32 pad1;
	u64 dma_ring_addr;
	enum virtchnl_rx_hsplit rx_split_pos; /* deprecated with AVF 1.0 */
	u32 pad2;
};

VIRTCHNL_CHECK_STRUCT_LEN(40, virtchnl_rxq_info);

/* 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 virtchnl_queue_pair_info {
	/* NOTE: vsi_id and queue_id should be identical for both queues. */
	struct virtchnl_txq_info txq;
	struct virtchnl_rxq_info rxq;
};

VIRTCHNL_CHECK_STRUCT_LEN(64, virtchnl_queue_pair_info);

struct virtchnl_vsi_queue_config_info {
	u16 vsi_id;
	u16 num_queue_pairs;
	u32 pad;
	struct virtchnl_queue_pair_info qpair[1];
};

VIRTCHNL_CHECK_STRUCT_LEN(72, virtchnl_vsi_queue_config_info);

/* VIRTCHNL_OP_REQUEST_QUEUES
 * VF sends this message to request the PF to allocate additional queues to
 * this VF.  Each VF gets a guaranteed number of queues on init but asking for
 * additional queues must be negotiated.  This is a best effort request as it
 * is possible the PF does not have enough queues left to support the request.
 * If the PF cannot support the number requested it will respond with the
 * maximum number it is able to support.  If the request is successful, PF will
 * then reset the VF to institute required changes.
 */

/* VF resource request */
struct virtchnl_vf_res_request {
	u16 num_queue_pairs;
};

/* 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 virtchnl_vector_map {
	u16 vsi_id;
	u16 vector_id;
	u16 rxq_map;
	u16 txq_map;
	u16 rxitr_idx;
	u16 txitr_idx;
};

VIRTCHNL_CHECK_STRUCT_LEN(12, virtchnl_vector_map);

struct virtchnl_irq_map_info {
	u16 num_vectors;
	struct virtchnl_vector_map vecmap[1];
};

VIRTCHNL_CHECK_STRUCT_LEN(14, virtchnl_irq_map_info);

/* VIRTCHNL_OP_ENABLE_QUEUES
 * 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 virtchnl_queue_select {
	u16 vsi_id;
	u16 pad;
	u32 rx_queues;
	u32 tx_queues;
};

VIRTCHNL_CHECK_STRUCT_LEN(12, virtchnl_queue_select);

/* VIRTCHNL_OP_ADD_ETH_ADDR
 * 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.
 */

/* VIRTCHNL_OP_DEL_ETH_ADDR
 * 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 virtchnl_ether_addr {
	u8 addr[VIRTCHNL_ETH_LENGTH_OF_ADDRESS];
	u8 pad[2];
};

VIRTCHNL_CHECK_STRUCT_LEN(8, virtchnl_ether_addr);

struct virtchnl_ether_addr_list {
	u16 vsi_id;
	u16 num_elements;
	struct virtchnl_ether_addr list[1];
};

VIRTCHNL_CHECK_STRUCT_LEN(12, virtchnl_ether_addr_list);

#ifdef VIRTCHNL_SOL_VF_SUPPORT
/* VIRTCHNL_OP_GET_ADDNL_SOL_CONFIG
 * VF sends this message to get the default MTU and list of additional ethernet
 * addresses it is allowed to use.
 * PF responds with an indirect message containing
 * virtchnl_addnl_solaris_config with zero or more
 * virtchnl_ether_addr structures.
 *
 * It is expected that this operation will only ever be needed for Solaris VFs
 * running under a Solaris PF.
 */
struct virtchnl_addnl_solaris_config {
	u16 default_mtu;
	struct virtchnl_ether_addr_list al;
};

#endif
/* 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.
 */

/* 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 virtchnl_vlan_filter_list {
	u16 vsi_id;
	u16 num_elements;
	u16 vlan_id[1];
};

VIRTCHNL_CHECK_STRUCT_LEN(6, virtchnl_vlan_filter_list);

/* 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 virtchnl_promisc_info {
	u16 vsi_id;
	u16 flags;
};

VIRTCHNL_CHECK_STRUCT_LEN(4, virtchnl_promisc_info);

#define FLAG_VF_UNICAST_PROMISC	0x00000001
#define FLAG_VF_MULTICAST_PROMISC	0x00000002

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

/* VIRTCHNL_OP_CONFIG_RSS_KEY
 * VIRTCHNL_OP_CONFIG_RSS_LUT
 * VF sends these messages to configure RSS. Only supported if both PF
 * and VF drivers set the VIRTCHNL_VF_OFFLOAD_RSS_PF bit during
 * configuration negotiation. If this is the case, then the RSS fields in
 * the VF resource struct are valid.
 * Both the key and LUT are initialized to 0 by the PF, meaning that
 * RSS is effectively disabled until set up by the VF.
 */
struct virtchnl_rss_key {
	u16 vsi_id;
	u16 key_len;
	u8 key[1];         /* RSS hash key, packed bytes */
};

VIRTCHNL_CHECK_STRUCT_LEN(6, virtchnl_rss_key);

struct virtchnl_rss_lut {
	u16 vsi_id;
	u16 lut_entries;
	u8 lut[1];        /* RSS lookup table */
};

VIRTCHNL_CHECK_STRUCT_LEN(6, virtchnl_rss_lut);

/* VIRTCHNL_OP_GET_RSS_HENA_CAPS
 * VIRTCHNL_OP_SET_RSS_HENA
 * VF sends these messages to get and set the hash filter enable bits for RSS.
 * By default, the PF sets these to all possible traffic types that the
 * hardware supports. The VF can query this value if it wants to change the
 * traffic types that are hashed by the hardware.
 */
struct virtchnl_rss_hena {
	u64 hena;
};

VIRTCHNL_CHECK_STRUCT_LEN(8, virtchnl_rss_hena);

/* 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 virtchnl_event_codes {
	VIRTCHNL_EVENT_UNKNOWN = 0,
	VIRTCHNL_EVENT_LINK_CHANGE,
	VIRTCHNL_EVENT_RESET_IMPENDING,
	VIRTCHNL_EVENT_PF_DRIVER_CLOSE,
};

#define PF_EVENT_SEVERITY_INFO		0
#define PF_EVENT_SEVERITY_ATTENTION	1
#define PF_EVENT_SEVERITY_ACTION_REQUIRED	2
#define PF_EVENT_SEVERITY_CERTAIN_DOOM	255

struct virtchnl_pf_event {
	enum virtchnl_event_codes event;
	union {
		struct {
			enum virtchnl_link_speed link_speed;
			bool link_status;
		} link_event;
	} event_data;

	int severity;
};

VIRTCHNL_CHECK_STRUCT_LEN(16, virtchnl_pf_event);

#ifdef VIRTCHNL_IWARP

/* VIRTCHNL_OP_CONFIG_IWARP_IRQ_MAP
 * VF uses this message to request PF to map IWARP vectors to IWARP queues.
 * The request for this originates from the VF IWARP driver through
 * a client interface between VF LAN and VF IWARP driver.
 * A vector could have an AEQ and CEQ attached to it although
 * there is a single AEQ per VF IWARP instance in which case
 * most vectors will have an INVALID_IDX for aeq and valid idx for ceq.
 * There will never be a case where there will be multiple CEQs attached
 * to a single vector.
 * PF configures interrupt mapping and returns status.
 */

/* HW does not define a type value for AEQ; only for RX/TX and CEQ.
 * In order for us to keep the interface simple, SW will define a
 * unique type value for AEQ.
 */
#define QUEUE_TYPE_PE_AEQ  0x80
#define QUEUE_INVALID_IDX  0xFFFF

struct virtchnl_iwarp_qv_info {
	u32 v_idx; /* msix_vector */
	u16 ceq_idx;
	u16 aeq_idx;
	u8 itr_idx;
};

VIRTCHNL_CHECK_STRUCT_LEN(12, virtchnl_iwarp_qv_info);

struct virtchnl_iwarp_qvlist_info {
	u32 num_vectors;
	struct virtchnl_iwarp_qv_info qv_info[1];
};

VIRTCHNL_CHECK_STRUCT_LEN(16, virtchnl_iwarp_qvlist_info);

#endif

/* VF reset states - these are written into the RSTAT register:
 * 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 virtchnl_vfr_states {
	VIRTCHNL_VFR_INPROGRESS = 0,
	VIRTCHNL_VFR_COMPLETED,
	VIRTCHNL_VFR_VFACTIVE,
};

/**
 * virtchnl_vc_validate_vf_msg
 * @ver: Virtchnl version info
 * @v_opcode: Opcode for the message
 * @msg: pointer to the msg buffer
 * @msglen: msg length
 *
 * validate msg format against struct for each opcode
 */
static inline int
virtchnl_vc_validate_vf_msg(struct virtchnl_version_info *ver, u32 v_opcode,
			    u8 *msg, u16 msglen)
{
	bool err_msg_format = false;
	int valid_len = 0;

	/* Validate message length. */
	switch (v_opcode) {
	case VIRTCHNL_OP_VERSION:
		valid_len = sizeof(struct virtchnl_version_info);
		break;
	case VIRTCHNL_OP_RESET_VF:
		break;
	case VIRTCHNL_OP_GET_VF_RESOURCES:
		if (VF_IS_V11(ver))
			valid_len = sizeof(u32);
		break;
	case VIRTCHNL_OP_CONFIG_TX_QUEUE:
		valid_len = sizeof(struct virtchnl_txq_info);
		break;
	case VIRTCHNL_OP_CONFIG_RX_QUEUE:
		valid_len = sizeof(struct virtchnl_rxq_info);
		break;
	case VIRTCHNL_OP_CONFIG_VSI_QUEUES:
		valid_len = sizeof(struct virtchnl_vsi_queue_config_info);
		if (msglen >= valid_len) {
			struct virtchnl_vsi_queue_config_info *vqc =
			    (struct virtchnl_vsi_queue_config_info *)msg;
			valid_len += (vqc->num_queue_pairs *
				      sizeof(struct
					     virtchnl_queue_pair_info));
			if (vqc->num_queue_pairs == 0)
				err_msg_format = true;
		}
		break;
	case VIRTCHNL_OP_CONFIG_IRQ_MAP:
		valid_len = sizeof(struct virtchnl_irq_map_info);
		if (msglen >= valid_len) {
			struct virtchnl_irq_map_info *vimi =
			    (struct virtchnl_irq_map_info *)msg;
			valid_len += (vimi->num_vectors *
				      sizeof(struct virtchnl_vector_map));
			if (vimi->num_vectors == 0)
				err_msg_format = true;
		}
		break;
	case VIRTCHNL_OP_ENABLE_QUEUES:
	case VIRTCHNL_OP_DISABLE_QUEUES:
		valid_len = sizeof(struct virtchnl_queue_select);
		break;
	case VIRTCHNL_OP_ADD_ETH_ADDR:
	case VIRTCHNL_OP_DEL_ETH_ADDR:
		valid_len = sizeof(struct virtchnl_ether_addr_list);
		if (msglen >= valid_len) {
			struct virtchnl_ether_addr_list *veal =
			    (struct virtchnl_ether_addr_list *)msg;
			valid_len += veal->num_elements *
			    sizeof(struct virtchnl_ether_addr);
			if (veal->num_elements == 0)
				err_msg_format = true;
		}
		break;
	case VIRTCHNL_OP_ADD_VLAN:
	case VIRTCHNL_OP_DEL_VLAN:
		valid_len = sizeof(struct virtchnl_vlan_filter_list);
		if (msglen >= valid_len) {
			struct virtchnl_vlan_filter_list *vfl =
			    (struct virtchnl_vlan_filter_list *)msg;
			valid_len += vfl->num_elements * sizeof(u16);
			if (vfl->num_elements == 0)
				err_msg_format = true;
		}
		break;
	case VIRTCHNL_OP_CONFIG_PROMISCUOUS_MODE:
		valid_len = sizeof(struct virtchnl_promisc_info);
		break;
	case VIRTCHNL_OP_GET_STATS:
		valid_len = sizeof(struct virtchnl_queue_select);
		break;
#ifdef VIRTCHNL_IWARP
	case VIRTCHNL_OP_IWARP:
		/* These messages are opaque to us and will be validated in
		 * the RDMA client code. We just need to check for nonzero
		 * length. The firmware will enforce max length restrictions.
		 */
		if (msglen)
			valid_len = msglen;
		else
			err_msg_format = true;
		break;
	case VIRTCHNL_OP_RELEASE_IWARP_IRQ_MAP:
		break;
	case VIRTCHNL_OP_CONFIG_IWARP_IRQ_MAP:
		valid_len = sizeof(struct virtchnl_iwarp_qvlist_info);
		if (msglen >= valid_len) {
			struct virtchnl_iwarp_qvlist_info *qv =
				(struct virtchnl_iwarp_qvlist_info *)msg;
			if (qv->num_vectors == 0) {
				err_msg_format = true;
				break;
			}
			valid_len += ((qv->num_vectors - 1) *
				sizeof(struct virtchnl_iwarp_qv_info));
		}
		break;
#endif
	case VIRTCHNL_OP_CONFIG_RSS_KEY:
		valid_len = sizeof(struct virtchnl_rss_key);
		if (msglen >= valid_len) {
			struct virtchnl_rss_key *vrk =
				(struct virtchnl_rss_key *)msg;
			valid_len += vrk->key_len - 1;
		}
		break;
	case VIRTCHNL_OP_CONFIG_RSS_LUT:
		valid_len = sizeof(struct virtchnl_rss_lut);
		if (msglen >= valid_len) {
			struct virtchnl_rss_lut *vrl =
				(struct virtchnl_rss_lut *)msg;
			valid_len += vrl->lut_entries - 1;
		}
		break;
	case VIRTCHNL_OP_GET_RSS_HENA_CAPS:
		break;
	case VIRTCHNL_OP_SET_RSS_HENA:
		valid_len = sizeof(struct virtchnl_rss_hena);
		break;
	case VIRTCHNL_OP_ENABLE_VLAN_STRIPPING:
	case VIRTCHNL_OP_DISABLE_VLAN_STRIPPING:
		break;
	case VIRTCHNL_OP_REQUEST_QUEUES:
		valid_len = sizeof(struct virtchnl_vf_res_request);
		break;
	/* These are always errors coming from the VF. */
	case VIRTCHNL_OP_EVENT:
	case VIRTCHNL_OP_UNKNOWN:
	default:
		return VIRTCHNL_ERR_PARAM;
	}
	/* few more checks */
	if (err_msg_format || valid_len != msglen)
		return VIRTCHNL_STATUS_ERR_OPCODE_MISMATCH;

	return 0;
}
#endif /* _VIRTCHNL_H_ */