20060303

1 files changed, 132 insertions, 0 deletions

diff --git a/os/port/sd.h b/os/port/sd.h
new file mode 100644
index 00000000..a469cff6
--- /dev/null
+++ b/os/port/sd.h
@@ -0,0 +1,132 @@
+/*
+ * Storage Device.
+ */
+typedef struct SDev SDev;
+typedef struct SDifc SDifc;
+typedef struct SDpart SDpart;
+typedef struct SDperm SDperm;
+typedef struct SDreq SDreq;
+typedef struct SDunit SDunit;
+
+struct SDperm {
+	char*	name;
+	char*	user;
+	ulong	perm;
+};
+
+struct SDpart {
+	ulong	start;
+	ulong	end;
+	SDperm;
+	int	valid;
+	ulong	vers;
+};
+
+struct SDunit {
+	SDev*	dev;
+	int	subno;
+	uchar	inquiry[256];		/* format follows SCSI spec */
+	SDperm;
+
+	QLock	ctl;
+	ulong	sectors;
+	ulong	secsize;
+	SDpart*	part;			/* nil or array of size npart */
+	int	npart;
+	ulong	vers;
+	SDperm	ctlperm;
+
+	QLock	raw;			/* raw read or write in progress */
+	ulong	rawinuse;		/* really just a test-and-set */
+	int	state;
+	SDreq*	req;
+	SDperm	rawperm;
+};
+
+/* 
+ * Each controller is represented by a SDev.
+ * Each controller is responsible for allocating its unit structures.
+ * Each controller has at least one unit.
+ */ 
+struct SDev {
+	Ref	r;			/* Number of callers using device */
+	SDifc*	ifc;			/* pnp/legacy */
+	void*	ctlr;
+	int	idno;
+	char*	name;
+	SDev*	next;
+
+	QLock;				/* enable/disable */
+	int	enabled;
+	int	nunit;			/* Number of units */
+	QLock	unitlock;		/* `Loading' of units */
+	int*	unitflg;		/* Unit flags */
+	SDunit**unit;
+};
+
+struct SDifc {
+	char*	name;
+
+	SDev*	(*pnp)(void);
+	SDev*	(*legacy)(int, int);
+	SDev*	(*id)(SDev*);
+	int	(*enable)(SDev*);
+	int	(*disable)(SDev*);
+
+	int	(*verify)(SDunit*);
+	int	(*online)(SDunit*);
+	int	(*rio)(SDreq*);
+	int	(*rctl)(SDunit*, char*, int);
+	int	(*wctl)(SDunit*, Cmdbuf*);
+
+	long	(*bio)(SDunit*, int, int, void*, long, long);
+	SDev*	(*probe)(DevConf*);
+	void	(*clear)(SDev*);
+	char*	(*stat)(SDev*, char*, char*);
+};
+
+struct SDreq {
+	SDunit*	unit;
+	int	lun;
+	int	write;
+	uchar	cmd[16];
+	int	clen;
+	void*	data;
+	int	dlen;
+
+	int	flags;
+
+	int	status;
+	long	rlen;
+	uchar	sense[256];
+};
+
+enum {
+	SDnosense	= 0x00000001,
+	SDvalidsense	= 0x00010000,
+};
+
+enum {
+	SDretry		= -5,		/* internal to controllers */
+	SDmalloc	= -4,
+	SDeio		= -3,
+	SDtimeout	= -2,
+	SDnostatus	= -1,
+
+	SDok		= 0,
+
+	SDcheck		= 0x02,		/* check condition */
+	SDbusy		= 0x08,		/* busy */
+
+	SDmaxio		= 2048*1024,
+	SDnpart		= 16,
+};
+
+#define sdmalloc(n)	malloc(n)
+#define sdfree(p)	free(p)
+
+/* sdscsi.c */
+extern int scsiverify(SDunit*);
+extern int scsionline(SDunit*);
+extern long scsibio(SDunit*, int, int, void*, long, long);
+extern SDev* scsiid(SDev*, SDifc*);