1/* 2 * PCI Backend/Frontend Common Data Structures & Macros 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a copy 5 * of this software and associated documentation files (the "Software"), to 6 * deal in the Software without restriction, including without limitation the 7 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or 8 * sell copies of the Software, and to permit persons to whom the Software is 9 * furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 19 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 20 * DEALINGS IN THE SOFTWARE. 21 * 22 * Author: Ryan Wilson <hap9@epoch.ncsc.mil> 23 */ 24#ifndef __XEN_PCI_COMMON_H__ 25#define __XEN_PCI_COMMON_H__ 26 27/* Be sure to bump this number if you change this file */ 28#define XEN_PCI_MAGIC "7" 29 30/* xen_pci_sharedinfo flags */ 31#define _XEN_PCIF_active (0) 32#define XEN_PCIF_active (1<<_XEN_PCI_active) 33 34/* xen_pci_op commands */ 35#define XEN_PCI_OP_conf_read (0) 36#define XEN_PCI_OP_conf_write (1) 37#define XEN_PCI_OP_enable_msi (2) 38#define XEN_PCI_OP_disable_msi (3) 39#define XEN_PCI_OP_enable_msix (4) 40#define XEN_PCI_OP_disable_msix (5) 41 42/* xen_pci_op error numbers */ 43#define XEN_PCI_ERR_success (0) 44#define XEN_PCI_ERR_dev_not_found (-1) 45#define XEN_PCI_ERR_invalid_offset (-2) 46#define XEN_PCI_ERR_access_denied (-3) 47#define XEN_PCI_ERR_not_implemented (-4) 48/* XEN_PCI_ERR_op_failed - backend failed to complete the operation */ 49#define XEN_PCI_ERR_op_failed (-5) 50 51/* 52 * it should be PAGE_SIZE-sizeof(struct xen_pci_op))/sizeof(struct msix_entry)) 53 * Should not exceed 128 54 */ 55#define SH_INFO_MAX_VEC 128 56 57struct xen_msix_entry { 58 uint16_t vector; 59 uint16_t entry; 60}; 61struct xen_pci_op { 62 /* IN: what action to perform: XEN_PCI_OP_* */ 63 uint32_t cmd; 64 65 /* OUT: will contain an error number (if any) from errno.h */ 66 int32_t err; 67 68 /* IN: which device to touch */ 69 uint32_t domain; /* PCI Domain/Segment */ 70 uint32_t bus; 71 uint32_t devfn; 72 73 /* IN: which configuration registers to touch */ 74 int32_t offset; 75 int32_t size; 76 77 /* IN/OUT: Contains the result after a READ or the value to WRITE */ 78 uint32_t value; 79 /* IN: Contains extra infor for this operation */ 80 uint32_t info; 81 /*IN: param for msi-x */ 82 struct xen_msix_entry msix_entries[SH_INFO_MAX_VEC]; 83}; 84 85struct xen_pci_sharedinfo { 86 /* flags - XEN_PCIF_* */ 87 uint32_t flags; 88 struct xen_pci_op op; 89}; 90 91#endif /* __XEN_PCI_COMMON_H__ */ 92 93/* 94 * Local variables: 95 * mode: C 96 * c-set-style: "BSD" 97 * c-basic-offset: 4 98 * tab-width: 4 99 * indent-tabs-mode: nil 100 * End: 101 */ 102