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1da177e4 LT |
1 | #ifndef _SCSI_SCSI_REQUEST_H |
2 | #define _SCSI_SCSI_REQUEST_H | |
3 | ||
4 | #include <scsi/scsi_cmnd.h> | |
5 | ||
6 | struct request; | |
7 | struct scsi_cmnd; | |
8 | struct scsi_device; | |
9 | struct Scsi_Host; | |
10 | ||
11 | ||
12 | /* | |
13 | * This is essentially a slimmed down version of Scsi_Cmnd. The point of | |
14 | * having this is that requests that are injected into the queue as result | |
15 | * of things like ioctls and character devices shouldn't be using a | |
16 | * Scsi_Cmnd until such a time that the command is actually at the head | |
17 | * of the queue and being sent to the driver. | |
18 | */ | |
19 | struct scsi_request { | |
20 | int sr_magic; | |
21 | int sr_result; /* Status code from lower level driver */ | |
22 | unsigned char sr_sense_buffer[SCSI_SENSE_BUFFERSIZE]; /* obtained by REQUEST SENSE | |
23 | * when CHECK CONDITION is | |
24 | * received on original command | |
25 | * (auto-sense) */ | |
26 | ||
27 | struct Scsi_Host *sr_host; | |
28 | struct scsi_device *sr_device; | |
29 | struct scsi_cmnd *sr_command; | |
30 | struct request *sr_request; /* A copy of the command we are | |
31 | working on */ | |
32 | unsigned sr_bufflen; /* Size of data buffer */ | |
33 | void *sr_buffer; /* Data buffer */ | |
34 | int sr_allowed; | |
35 | enum dma_data_direction sr_data_direction; | |
36 | unsigned char sr_cmd_len; | |
37 | unsigned char sr_cmnd[MAX_COMMAND_SIZE]; | |
38 | void (*sr_done) (struct scsi_cmnd *); /* Mid-level done function */ | |
39 | int sr_timeout_per_command; | |
40 | unsigned short sr_use_sg; /* Number of pieces of scatter-gather */ | |
41 | unsigned short sr_sglist_len; /* size of malloc'd scatter-gather list */ | |
42 | unsigned sr_underflow; /* Return error if less than | |
43 | this amount is transferred */ | |
44 | void *upper_private_data; /* reserved for owner (usually upper | |
45 | level driver) of this request */ | |
46 | }; | |
47 | ||
48 | extern struct scsi_request *scsi_allocate_request(struct scsi_device *, int); | |
49 | extern void scsi_release_request(struct scsi_request *); | |
50 | extern void scsi_wait_req(struct scsi_request *, const void *cmnd, | |
51 | void *buffer, unsigned bufflen, | |
52 | int timeout, int retries); | |
53 | extern void scsi_do_req(struct scsi_request *, const void *cmnd, | |
54 | void *buffer, unsigned bufflen, | |
55 | void (*done) (struct scsi_cmnd *), | |
56 | int timeout, int retries); | |
57 | ||
58 | struct scsi_mode_data { | |
59 | __u32 length; | |
60 | __u16 block_descriptor_length; | |
61 | __u8 medium_type; | |
62 | __u8 device_specific; | |
63 | __u8 header_length; | |
64 | __u8 longlba:1; | |
65 | }; | |
66 | ||
67 | extern int __scsi_mode_sense(struct scsi_request *SRpnt, int dbd, | |
68 | int modepage, unsigned char *buffer, int len, | |
69 | int timeout, int retries, | |
70 | struct scsi_mode_data *data); | |
71 | ||
72 | ||
73 | #endif /* _SCSI_SCSI_REQUEST_H */ |