| Juergen Gross | 9e2b3e8 | 2021-10-15 16:33:12 +0200 | [diff] [blame] | 1 | /* SPDX-License-Identifier: MIT */ |
| Ryan Wilson | 956a920 | 2010-08-02 21:31:05 -0400 | [diff] [blame] | 2 | /* |
| 3 | * PCI Backend/Frontend Common Data Structures & Macros |
| 4 | * |
| Ryan Wilson | 956a920 | 2010-08-02 21:31:05 -0400 | [diff] [blame] | 5 | * Author: Ryan Wilson <hap9@epoch.ncsc.mil> |
| 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__ */ |