96 lines
2.5 KiB
C
96 lines
2.5 KiB
C
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/* SPDX-License-Identifier: MIT */
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/*
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* PCI Backend/Frontend Common Data Structures & Macros
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*
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* Author: Ryan Wilson <hap9@epoch.ncsc.mil>
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*/
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#ifndef __XEN_PCI_COMMON_H__
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#define __XEN_PCI_COMMON_H__
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/* Be sure to bump this number if you change this file */
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#define XEN_PCI_MAGIC "7"
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/* xen_pci_sharedinfo flags */
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#define _XEN_PCIF_active (0)
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#define XEN_PCIF_active (1<<_XEN_PCIF_active)
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#define _XEN_PCIB_AERHANDLER (1)
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#define XEN_PCIB_AERHANDLER (1<<_XEN_PCIB_AERHANDLER)
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#define _XEN_PCIB_active (2)
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#define XEN_PCIB_active (1<<_XEN_PCIB_active)
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/* xen_pci_op commands */
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#define XEN_PCI_OP_conf_read (0)
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#define XEN_PCI_OP_conf_write (1)
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#define XEN_PCI_OP_enable_msi (2)
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#define XEN_PCI_OP_disable_msi (3)
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#define XEN_PCI_OP_enable_msix (4)
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#define XEN_PCI_OP_disable_msix (5)
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#define XEN_PCI_OP_aer_detected (6)
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#define XEN_PCI_OP_aer_resume (7)
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#define XEN_PCI_OP_aer_mmio (8)
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#define XEN_PCI_OP_aer_slotreset (9)
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/* xen_pci_op error numbers */
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#define XEN_PCI_ERR_success (0)
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#define XEN_PCI_ERR_dev_not_found (-1)
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#define XEN_PCI_ERR_invalid_offset (-2)
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#define XEN_PCI_ERR_access_denied (-3)
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#define XEN_PCI_ERR_not_implemented (-4)
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/* XEN_PCI_ERR_op_failed - backend failed to complete the operation */
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#define XEN_PCI_ERR_op_failed (-5)
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/*
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* it should be PAGE_SIZE-sizeof(struct xen_pci_op))/sizeof(struct msix_entry))
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* Should not exceed 128
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*/
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#define SH_INFO_MAX_VEC 128
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struct xen_msix_entry {
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uint16_t vector;
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uint16_t entry;
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};
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struct xen_pci_op {
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/* IN: what action to perform: XEN_PCI_OP_* */
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uint32_t cmd;
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/* OUT: will contain an error number (if any) from errno.h */
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int32_t err;
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/* IN: which device to touch */
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uint32_t domain; /* PCI Domain/Segment */
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uint32_t bus;
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uint32_t devfn;
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/* IN: which configuration registers to touch */
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int32_t offset;
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int32_t size;
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/* IN/OUT: Contains the result after a READ or the value to WRITE */
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uint32_t value;
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/* IN: Contains extra infor for this operation */
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uint32_t info;
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/*IN: param for msi-x */
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struct xen_msix_entry msix_entries[SH_INFO_MAX_VEC];
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};
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/*used for pcie aer handling*/
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struct xen_pcie_aer_op {
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/* IN: what action to perform: XEN_PCI_OP_* */
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uint32_t cmd;
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/*IN/OUT: return aer_op result or carry error_detected state as input*/
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int32_t err;
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/* IN: which device to touch */
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uint32_t domain; /* PCI Domain/Segment*/
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uint32_t bus;
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uint32_t devfn;
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};
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struct xen_pci_sharedinfo {
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/* flags - XEN_PCIF_* */
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uint32_t flags;
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struct xen_pci_op op;
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struct xen_pcie_aer_op aer_op;
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};
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#endif /* __XEN_PCI_COMMON_H__ */
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