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