/** @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__ |