sd.h - vx32 - Local 9vx git repository for patches.
(HTM) git clone git://r-36.net/vx32
(DIR) Log
(DIR) Files
(DIR) Refs
---
sd.h (2656B)
---
1 /*
2 * Storage Device.
3 */
4 typedef struct SDev SDev;
5 typedef struct SDifc SDifc;
6 typedef struct SDpart SDpart;
7 typedef struct SDperm SDperm;
8 typedef struct SDreq SDreq;
9 typedef struct SDunit SDunit;
10
11 struct SDperm {
12 char* name;
13 char* user;
14 ulong perm;
15 };
16
17 struct SDpart {
18 uvlong start;
19 uvlong end;
20 SDperm perm;
21 int valid;
22 ulong vers;
23 };
24
25 struct SDunit {
26 SDev* dev;
27 int subno;
28 uchar inquiry[255]; /* format follows SCSI spec */
29 uchar sense[18]; /* format follows SCSI spec */
30 SDperm perm;
31
32 QLock ctl;
33 uvlong sectors;
34 ulong secsize;
35 SDpart* part; /* nil or array of size npart */
36 int npart;
37 ulong vers;
38 SDperm ctlperm;
39
40 QLock raw; /* raw read or write in progress */
41 ulong rawinuse; /* really just a test-and-set */
42 int state;
43 SDreq* req;
44 SDperm rawperm;
45 };
46
47 /*
48 * Each controller is represented by a SDev.
49 */
50 struct SDev {
51 Ref r; /* Number of callers using device */
52 SDifc* ifc; /* pnp/legacy */
53 void* ctlr;
54 int idno;
55 char name[8];
56 SDev* next;
57
58 QLock lk; /* enable/disable */
59 int enabled;
60 int nunit; /* Number of units */
61 QLock unitlock; /* `Loading' of units */
62 int* unitflg; /* Unit flags */
63 SDunit**unit;
64 };
65
66 struct SDifc {
67 char* name;
68
69 SDev* (*pnp)(void);
70 SDev* (*legacy)(int, int);
71 int (*enable)(SDev*);
72 int (*disable)(SDev*);
73
74 int (*verify)(SDunit*);
75 int (*online)(SDunit*);
76 int (*rio)(SDreq*);
77 int (*rctl)(SDunit*, char*, int);
78 int (*wctl)(SDunit*, Cmdbuf*);
79
80 long (*bio)(SDunit*, int, int, void*, long, uvlong);
81 SDev* (*probe)(DevConf*);
82 void (*clear)(SDev*);
83 char* (*rtopctl)(SDev*, char*, char*);
84 int (*wtopctl)(SDev*, Cmdbuf*);
85 };
86
87 struct SDreq {
88 SDunit* unit;
89 int lun;
90 int write;
91 uchar cmd[16];
92 int clen;
93 void* data;
94 int dlen;
95
96 int flags;
97
98 int status;
99 long rlen;
100 uchar sense[256];
101 };
102
103 enum {
104 SDnosense = 0x00000001,
105 SDvalidsense = 0x00010000,
106 };
107
108 enum {
109 SDretry = -5, /* internal to controllers */
110 SDmalloc = -4,
111 SDeio = -3,
112 SDtimeout = -2,
113 SDnostatus = -1,
114
115 SDok = 0,
116
117 SDcheck = 0x02, /* check condition */
118 SDbusy = 0x08, /* busy */
119
120 SDmaxio = 2048*1024,
121 SDnpart = 16,
122 };
123
124 #define sdmalloc(n) malloc(n)
125 #define sdfree(p) free(p)
126
127 /* devsd.c */
128 extern void sdadddevs(SDev*);
129 extern int sdsetsense(SDreq*, int, int, int, int);
130 extern int sdmodesense(SDreq*, uchar*, void*, int);
131 extern int sdfakescsi(SDreq*, void*, int);
132 extern void sdaddpart(SDunit*, char*, uvlong, uvlong);
133 extern SDpart* sdfindpart(SDunit*, char*);
134
135 /* sdscsi.c */
136 extern int scsiverify(SDunit*);
137 extern int scsionline(SDunit*);
138 extern long scsibio(SDunit*, int, int, void*, long, uvlong);
139 extern SDev* scsiid(SDev*, SDifc*);
140
141 /* part.c */
142 extern void partition(SDunit*);