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/** @file
Work with PCI capabilities in PCI config space -- internal type definitions.
Copyright (C) 2018, Red Hat, Inc.
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef __BASE_PCI_CAP_LIB_H__
#define __BASE_PCI_CAP_LIB_H__
#include <Library/OrderedCollectionLib.h>
#include <Library/PciCapLib.h>
//
// Structure that uniquely identifies a capability instance and serves as key
// for insertion and lookup.
//
typedef struct {
PCI_CAP_DOMAIN Domain;
UINT16 CapId;
UINT16 Instance;
} PCI_CAP_KEY;
//
// In Instance==0 PCI_CAP objects, store NumInstances directly. In Instance>0
// PCI_CAP objects, link Instance#0 of the same (Domain, CapId). This way
// NumInstances needs maintenance in one object only, per (Domain, CapId) pair.
//
typedef union {
UINT16 NumInstances;
PCI_CAP *InstanceZero;
} PCI_CAP_NUM_INSTANCES;
//
// Complete the incomplete PCI_CAP structure here.
//
struct PCI_CAP {
PCI_CAP_KEY Key;
PCI_CAP_NUM_INSTANCES NumInstancesUnion;
UINT16 Offset;
UINT16 MaxSizeHint;
UINT8 Version;
};
//
// Complete the incomplete PCI_CAP_LIST structure here.
//
struct PCI_CAP_LIST {
ORDERED_COLLECTION *Capabilities;
};
#endif // __BASE_PCI_CAP_LIB_H__
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