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d7e28ffe RR |
1 | #ifndef _ASM_LGUEST_USER |
2 | #define _ASM_LGUEST_USER | |
3 | /* Everything the "lguest" userspace program needs to know. */ | |
4 | /* They can register up to 32 arrays of lguest_dma. */ | |
5 | #define LGUEST_MAX_DMA 32 | |
6 | /* At most we can dma 16 lguest_dma in one op. */ | |
7 | #define LGUEST_MAX_DMA_SECTIONS 16 | |
8 | ||
9 | /* How many devices? Assume each one wants up to two dma arrays per device. */ | |
10 | #define LGUEST_MAX_DEVICES (LGUEST_MAX_DMA/2) | |
11 | ||
12 | struct lguest_dma | |
13 | { | |
14 | /* 0 if free to be used, filled by hypervisor. */ | |
15 | u32 used_len; | |
16 | unsigned long addr[LGUEST_MAX_DMA_SECTIONS]; | |
17 | u16 len[LGUEST_MAX_DMA_SECTIONS]; | |
18 | }; | |
19 | ||
20 | struct lguest_block_page | |
21 | { | |
22 | /* 0 is a read, 1 is a write. */ | |
23 | int type; | |
24 | u32 sector; /* Offset in device = sector * 512. */ | |
25 | u32 bytes; /* Length expected to be read/written in bytes */ | |
26 | /* 0 = pending, 1 = done, 2 = done, error */ | |
27 | int result; | |
28 | u32 num_sectors; /* Disk length = num_sectors * 512 */ | |
29 | }; | |
30 | ||
31 | /* There is a shared page of these. */ | |
32 | struct lguest_net | |
33 | { | |
34 | /* Simply the mac address (with multicast bit meaning promisc). */ | |
35 | unsigned char mac[6]; | |
36 | }; | |
37 | ||
38 | /* Where the Host expects the Guest to SEND_DMA console output to. */ | |
39 | #define LGUEST_CONSOLE_DMA_KEY 0 | |
40 | ||
41 | /* We have a page of these descriptors in the lguest_device page. */ | |
42 | struct lguest_device_desc { | |
43 | u16 type; | |
44 | #define LGUEST_DEVICE_T_CONSOLE 1 | |
45 | #define LGUEST_DEVICE_T_NET 2 | |
46 | #define LGUEST_DEVICE_T_BLOCK 3 | |
47 | ||
48 | u16 features; | |
49 | #define LGUEST_NET_F_NOCSUM 0x4000 /* Don't bother checksumming */ | |
50 | #define LGUEST_DEVICE_F_RANDOMNESS 0x8000 /* IRQ is fairly random */ | |
51 | ||
52 | u16 status; | |
53 | /* 256 and above are device specific. */ | |
54 | #define LGUEST_DEVICE_S_ACKNOWLEDGE 1 /* We have seen device. */ | |
55 | #define LGUEST_DEVICE_S_DRIVER 2 /* We have found a driver */ | |
56 | #define LGUEST_DEVICE_S_DRIVER_OK 4 /* Driver says OK! */ | |
57 | #define LGUEST_DEVICE_S_REMOVED 8 /* Device has gone away. */ | |
58 | #define LGUEST_DEVICE_S_REMOVED_ACK 16 /* Driver has been told. */ | |
59 | #define LGUEST_DEVICE_S_FAILED 128 /* Something actually failed */ | |
60 | ||
61 | u16 num_pages; | |
62 | u32 pfn; | |
63 | }; | |
64 | ||
65 | /* Write command first word is a request. */ | |
66 | enum lguest_req | |
67 | { | |
68 | LHREQ_INITIALIZE, /* + pfnlimit, pgdir, start, pageoffset */ | |
69 | LHREQ_GETDMA, /* + addr (returns &lguest_dma, irq in ->used_len) */ | |
70 | LHREQ_IRQ, /* + irq */ | |
71 | LHREQ_BREAK, /* + on/off flag (on blocks until someone does off) */ | |
72 | }; | |
73 | #endif /* _ASM_LGUEST_USER */ |