1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167

use std::ops::Add;

use modular_bitfield::prelude::*;

use crate::ds::{namespace::NamespaceId, sgl::SglDescriptor, Address};

use super::CommandId;
// 2b::3.3.3.1

#[bitfield(bits = 32)]
#[derive(Default, Clone, Copy, Debug)]
pub struct CommandDword0 {
    op: B8,
    fuse: FuseSpec,
    #[skip]
    res0: B4,
    psdt: Psdt,
    cid: CommandId,
}

impl CommandDword0 {
    pub fn build(op: u8, cid: CommandId, fuse: FuseSpec, psdt: Psdt) -> Self {
        Self::new()
            .with_op(op)
            .with_cid(cid)
            .with_fuse(fuse)
            .with_psdt(psdt)
    }
}

#[derive(BitfieldSpecifier, Clone, Copy, Debug)]
#[bits = 2]
pub enum Psdt {
    Prp,
    Sgl,
    SglAndMeta,
}

#[derive(BitfieldSpecifier, Clone, Copy, Debug)]
#[bits = 2]
pub enum FuseSpec {
    Normal,
    FuseFirst,
    FuseSecond,
}

#[derive(Clone, Copy)]
#[repr(C)]
union DptrData {
    prp: [Address; 2],
    sgl: SglDescriptor,
}

impl Default for DptrData {
    fn default() -> Self {
        Self { prp: [0; 2] }
    }
}

#[derive(Default, Clone, Copy)]
#[repr(C)]
pub struct CommonCommand {
    cdw0: CommandDword0,
    nsid: NamespaceId,
    cdw2: u32,
    cdw3: u32,
    mptr: Address,
    dptr: DptrData,
    cdw10: u32,
    cdw11: u32,
    cdw12: u32,
    cdw13: u32,
    cdw14: u32,
    cdw15: u32,
}

impl CommonCommand {
    pub fn new() -> Self {
        Self::default()
    }

    pub fn with_cdw0(self, cdw0: CommandDword0) -> Self {
        Self { cdw0, ..self }
    }

    pub fn with_nsid(self, nsid: NamespaceId) -> Self {
        Self { nsid, ..self }
    }

    pub fn with_cdw2(self, cdw2: u32) -> Self {
        Self { cdw2, ..self }
    }

    pub fn with_cdw3(self, cdw3: u32) -> Self {
        Self { cdw3, ..self }
    }

    pub fn with_cdw10(self, cdw10: u32) -> Self {
        Self { cdw10, ..self }
    }

    pub fn with_cdw11(self, cdw11: u32) -> Self {
        Self { cdw11, ..self }
    }

    pub fn with_cdw12(self, cdw12: u32) -> Self {
        Self { cdw12, ..self }
    }

    pub fn with_cdw13(self, cdw13: u32) -> Self {
        Self { cdw13, ..self }
    }

    pub fn with_cdw14(self, cdw14: u32) -> Self {
        Self { cdw14, ..self }
    }

    pub fn with_cdw15(self, cdw15: u32) -> Self {
        Self { cdw15, ..self }
    }

    pub fn with_mptr(self, mptr: Address) -> Self {
        Self { mptr, ..self }
    }

    pub fn with_dptr(self, dptr: Dptr) -> Self {
        match dptr {
            Dptr::Prp(a1, a2) => Self {
                dptr: DptrData { prp: [a1, a2] },
                ..self
            },
            Dptr::Sgl(s) => Self {
                dptr: DptrData { sgl: s },
                ..self
            },
        }
    }

    pub fn with_cid(self, cid: CommandId) -> Self {
        let n = self.cdw0.with_cid(cid);
        self.with_cdw0(n)
    }

    pub fn set_cid(&mut self, cid: CommandId) {
        self.cdw0.set_cid(cid);
    }
}

pub enum Dptr {
    Prp(Address, Address),
    Sgl(SglDescriptor),
}

impl Dptr {
    pub fn psdt(&self, meta_is_sgl: bool) -> Psdt {
        match self {
            Dptr::Prp(_, _) => Psdt::Prp,
            Dptr::Sgl(_) => {
                if meta_is_sgl {
                    Psdt::SglAndMeta
                } else {
                    Psdt::Sgl
                }
            }
        }
    }
}