| Rusty Russell | d7e28ff | 2007-07-19 01:49:23 -0700 | [diff] [blame^] | 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 */ |