scsir/command/
test_unit_ready.rs

1#![allow(dead_code)]
2
3use modular_bitfield_msb::prelude::*;
4
5use crate::{result_data::ResultData, Command, DataDirection, Scsi};
6
7#[derive(Clone, Debug)]
8pub struct TestUnitReadyCommand<'a> {
9    interface: &'a Scsi,
10    command_buffer: CommandBuffer,
11}
12
13impl<'a> TestUnitReadyCommand<'a> {
14    fn new(interface: &'a Scsi) -> Self {
15        Self {
16            interface,
17            command_buffer: CommandBuffer::new().with_operation_code(OPERATION_CODE),
18        }
19    }
20
21    pub fn control(&mut self, value: u8) -> &mut Self {
22        self.command_buffer.set_control(value);
23        self
24    }
25
26    pub fn issue(&mut self) -> crate::Result<()> {
27        self.interface.issue(&ThisCommand {
28            command_buffer: self.command_buffer,
29        })
30    }
31}
32
33impl Scsi {
34    pub fn test_unit_ready(&self) -> TestUnitReadyCommand {
35        TestUnitReadyCommand::new(self)
36    }
37}
38
39const OPERATION_CODE: u8 = 0x00;
40
41#[bitfield]
42#[derive(Clone, Copy, Debug)]
43struct CommandBuffer {
44    operation_code: B8,
45    reserved: B32,
46    control: B8,
47}
48
49struct ThisCommand {
50    command_buffer: CommandBuffer,
51}
52
53impl Command for ThisCommand {
54    type CommandBuffer = CommandBuffer;
55
56    type DataBuffer = ();
57
58    type DataBufferWrapper = ();
59
60    type ReturnType = crate::Result<()>;
61
62    fn direction(&self) -> DataDirection {
63        DataDirection::None
64    }
65
66    fn command(&self) -> Self::CommandBuffer {
67        self.command_buffer
68    }
69
70    fn data(&self) -> Self::DataBufferWrapper {}
71
72    fn data_size(&self) -> u32 {
73        0
74    }
75
76    fn process_result(&self, result: ResultData<Self::DataBufferWrapper>) -> Self::ReturnType {
77        result.check_ioctl_error()?;
78        result.check_common_error()?;
79
80        Ok(())
81    }
82}
83
84#[cfg(test)]
85mod tests {
86    use super::*;
87    use std::mem::size_of;
88
89    const COMMAND_LENGTH: usize = 6;
90
91    #[test]
92    fn layout_test() {
93        assert_eq!(
94            size_of::<CommandBuffer>(),
95            COMMAND_LENGTH,
96            concat!("Size of: ", stringify!(CommandBuffer))
97        );
98    }
99}
scsir/command/test_unit_ready.rs

scsir/command/
test_unit_ready.rs
