projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 5c473400 S |
1 | /* |
| 2 | * | |
| 3 | * Copyright (c) 2011, Microsoft Corporation. | |
| 4 | * | |
| 5 | * This program is free software; you can redistribute it and/or modify it | |
| 6 | * under the terms and conditions of the GNU General Public License, | |
| 7 | * version 2, as published by the Free Software Foundation. | |
| 8 | * | |
| 9 | * This program is distributed in the hope it will be useful, but WITHOUT | |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
| 12 | * more details. | |
| 13 | * | |
| 14 | * You should have received a copy of the GNU General Public License along with | |
| 15 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple | |
| 16 | * Place - Suite 330, Boston, MA 02111-1307 USA. | |
| 17 | * | |
| 18 | * Authors: | |
| 19 | * Haiyang Zhang <haiyangz@microsoft.com> | |
| 20 | * Hank Janssen <hjanssen@microsoft.com> | |
| 21 | * K. Y. Srinivasan <kys@microsoft.com> | |
| 22 | * | |
| 23 | */ | |
| 3f335ea2 S |
24 | |
| 25 | #ifndef _HYPERV_H | |
| 26 | #define _HYPERV_H | |
| 27 | ||
| 28 | struct hv_guid { | |
| 29 | unsigned char data[16]; | |
| 30 | }; | |
| 31 | ||
| a363bf7b S |
32 | #define MAX_PAGE_BUFFER_COUNT 16 |
| 33 | #define MAX_MULTIPAGE_BUFFER_COUNT 32 /* 128K */ | |
| 34 | ||
| 35 | #pragma pack(push, 1) | |
| 36 | ||
| 37 | /* Single-page buffer */ | |
| 38 | struct hv_page_buffer { | |
| 39 | u32 len; | |
| 40 | u32 offset; | |
| 41 | u64 pfn; | |
| 42 | }; | |
| 43 | ||
| 44 | /* Multiple-page buffer */ | |
| 45 | struct hv_multipage_buffer { | |
| 46 | /* Length and Offset determines the # of pfns in the array */ | |
| 47 | u32 len; | |
| 48 | u32 offset; | |
| 49 | u64 pfn_array[MAX_MULTIPAGE_BUFFER_COUNT]; | |
| 50 | }; | |
| 51 | ||
| 52 | /* 0x18 includes the proprietary packet header */ | |
| 53 | #define MAX_PAGE_BUFFER_PACKET (0x18 + \ | |
| 54 | (sizeof(struct hv_page_buffer) * \ | |
| 55 | MAX_PAGE_BUFFER_COUNT)) | |
| 56 | #define MAX_MULTIPAGE_BUFFER_PACKET (0x18 + \ | |
| 57 | sizeof(struct hv_multipage_buffer)) | |
| 58 | ||
| 59 | ||
| 60 | #pragma pack(pop) | |
| 61 | ||
| 7effffb7 S |
62 | struct hv_ring_buffer { |
| 63 | /* Offset in bytes from the start of ring data below */ | |
| 64 | u32 write_index; | |
| 65 | ||
| 66 | /* Offset in bytes from the start of ring data below */ | |
| 67 | u32 read_index; | |
| 68 | ||
| 69 | u32 interrupt_mask; | |
| 70 | ||
| 71 | /* Pad it to PAGE_SIZE so that data starts on page boundary */ | |
| 72 | u8 reserved[4084]; | |
| 73 | ||
| 74 | /* NOTE: | |
| 75 | * The interrupt_mask field is used only for channels but since our | |
| 76 | * vmbus connection also uses this data structure and its data starts | |
| 77 | * here, we commented out this field. | |
| 78 | */ | |
| 79 | ||
| 80 | /* | |
| 81 | * Ring data starts here + RingDataStartOffset | |
| 82 | * !!! DO NOT place any fields below this !!! | |
| 83 | */ | |
| 84 | u8 buffer[0]; | |
| 85 | } __packed; | |
| 86 | ||
| 87 | struct hv_ring_buffer_info { | |
| 88 | struct hv_ring_buffer *ring_buffer; | |
| 89 | u32 ring_size; /* Include the shared header */ | |
| 90 | spinlock_t ring_lock; | |
| 91 | ||
| 92 | u32 ring_datasize; /* < ring_size */ | |
| 93 | u32 ring_data_startoffset; | |
| 94 | }; | |
| 95 | ||
| 96 | struct hv_ring_buffer_debug_info { | |
| 97 | u32 current_interrupt_mask; | |
| 98 | u32 current_read_index; | |
| 99 | u32 current_write_index; | |
| 100 | u32 bytes_avail_toread; | |
| 101 | u32 bytes_avail_towrite; | |
| 102 | }; | |
| 3f335ea2 S |
103 | |
| 104 | #endif /* _HYPERV_H */ |