Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/include/xen/interface/io/pciif.h
26286 views
1
/* SPDX-License-Identifier: MIT */

2
/*

3
 * PCI Backend/Frontend Common Data Structures & Macros

4
 *

5
 *   Author: Ryan Wilson <[email protected]>

6
 */

7
#ifndef __XEN_PCI_COMMON_H__

8
#define __XEN_PCI_COMMON_H__

9


10
/* Be sure to bump this number if you change this file */

11
#define XEN_PCI_MAGIC "7"

12


13
/* xen_pci_sharedinfo flags */

14
#define	_XEN_PCIF_active		(0)

15
#define	XEN_PCIF_active			(1<<_XEN_PCIF_active)

16
#define	_XEN_PCIB_AERHANDLER		(1)

17
#define	XEN_PCIB_AERHANDLER		(1<<_XEN_PCIB_AERHANDLER)

18
#define	_XEN_PCIB_active		(2)

19
#define	XEN_PCIB_active			(1<<_XEN_PCIB_active)

20


21
/* xen_pci_op commands */

22
#define	XEN_PCI_OP_conf_read		(0)

23
#define	XEN_PCI_OP_conf_write		(1)

24
#define	XEN_PCI_OP_enable_msi		(2)

25
#define	XEN_PCI_OP_disable_msi		(3)

26
#define	XEN_PCI_OP_enable_msix		(4)

27
#define	XEN_PCI_OP_disable_msix		(5)

28
#define	XEN_PCI_OP_aer_detected		(6)

29
#define	XEN_PCI_OP_aer_resume		(7)

30
#define	XEN_PCI_OP_aer_mmio		(8)

31
#define	XEN_PCI_OP_aer_slotreset	(9)

32


33
/* xen_pci_op error numbers */

34
#define	XEN_PCI_ERR_success		(0)

35
#define	XEN_PCI_ERR_dev_not_found	(-1)

36
#define	XEN_PCI_ERR_invalid_offset	(-2)

37
#define	XEN_PCI_ERR_access_denied	(-3)

38
#define	XEN_PCI_ERR_not_implemented	(-4)

39
/* XEN_PCI_ERR_op_failed - backend failed to complete the operation */

40
#define XEN_PCI_ERR_op_failed		(-5)

41


42
/*

43
 * it should be PAGE_SIZE-sizeof(struct xen_pci_op))/sizeof(struct msix_entry))

44
 * Should not exceed 128

45
 */

46
#define SH_INFO_MAX_VEC			128

47


48
struct xen_msix_entry {

49
	uint16_t vector;

50
	uint16_t entry;

51
};

52
struct xen_pci_op {

53
	/* IN: what action to perform: XEN_PCI_OP_* */

54
	uint32_t cmd;

55


56
	/* OUT: will contain an error number (if any) from errno.h */

57
	int32_t err;

58


59
	/* IN: which device to touch */

60
	uint32_t domain; /* PCI Domain/Segment */

61
	uint32_t bus;

62
	uint32_t devfn;

63


64
	/* IN: which configuration registers to touch */

65
	int32_t offset;

66
	int32_t size;

67


68
	/* IN/OUT: Contains the result after a READ or the value to WRITE */

69
	uint32_t value;

70
	/* IN: Contains extra infor for this operation */

71
	uint32_t info;

72
	/*IN:  param for msi-x */

73
	struct xen_msix_entry msix_entries[SH_INFO_MAX_VEC];

74
};

75


76
/*used for pcie aer handling*/

77
struct xen_pcie_aer_op {

78
	/* IN: what action to perform: XEN_PCI_OP_* */

79
	uint32_t cmd;

80
	/*IN/OUT: return aer_op result or carry error_detected state as input*/

81
	int32_t err;

82


83
	/* IN: which device to touch */

84
	uint32_t domain; /* PCI Domain/Segment*/

85
	uint32_t bus;

86
	uint32_t devfn;

87
};

88
struct xen_pci_sharedinfo {

89
	/* flags - XEN_PCIF_* */

90
	uint32_t flags;

91
	struct xen_pci_op op;

92
	struct xen_pcie_aer_op aer_op;

93
};

94


95
#endif /* __XEN_PCI_COMMON_H__ */

96


97