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/*
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 * Storage Device.
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 */
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typedef struct SDev SDev;
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typedef struct SDifc SDifc;
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typedef struct SDio SDio;
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typedef struct SDpart SDpart;
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typedef struct SDperm SDperm;
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typedef struct SDreq SDreq;
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typedef struct SDunit SDunit;
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struct SDperm {
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	char*	name;
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	char*	user;
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	ulong	perm;
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};
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struct SDpart {
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	uvlong	start;
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	uvlong	end;
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	SDperm;
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	int	valid;
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	ulong	vers;
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};
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struct SDunit {
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	SDev*	dev;
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	int	subno;
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	uchar	inquiry[255];		/* format follows SCSI spec */
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	uchar	sense[18];		/* format follows SCSI spec */
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	SDperm;
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	QLock	ctl;
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	uvlong	sectors;
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	ulong	secsize;
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	SDpart*	part;			/* nil or array of size npart */
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	int	npart;
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	ulong	vers;
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	SDperm	ctlperm;
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	QLock	raw;			/* raw read or write in progress */
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	ulong	rawinuse;		/* really just a test-and-set */
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	int	state;
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	SDreq*	req;
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	SDperm	rawperm;
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};
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/*
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 * Each controller is represented by a SDev.
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 */
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struct SDev {
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	Ref	r;			/* Number of callers using device */
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	SDifc*	ifc;			/* pnp/legacy */
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	void*	ctlr;
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	int	idno;
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	char	name[8];
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	SDev*	next;
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	QLock;				/* enable/disable */
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	int	enabled;
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	int	nunit;			/* Number of units */
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	QLock	unitlock;		/* `Loading' of units */
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	int*	unitflg;		/* Unit flags */
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	SDunit**unit;
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};
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struct SDifc {
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	char*	name;
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	SDev*	(*pnp)(void);
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	SDev*	(*legacy)(int, int);
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	int	(*enable)(SDev*);
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	int	(*disable)(SDev*);
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	int	(*verify)(SDunit*);
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	int	(*online)(SDunit*);
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	int	(*rio)(SDreq*);
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	int	(*rctl)(SDunit*, char*, int);
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	int	(*wctl)(SDunit*, Cmdbuf*);
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	long	(*bio)(SDunit*, int, int, void*, long, uvlong);
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	SDev*	(*probe)(DevConf*);
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	void	(*clear)(SDev*);
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	char*	(*rtopctl)(SDev*, char*, char*);
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	int	(*wtopctl)(SDev*, Cmdbuf*);
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};
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struct SDreq {
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	SDunit*	unit;
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	int	lun;
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	int	write;
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	uchar	cmd[16];
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	int	clen;
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	void*	data;
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	int	dlen;
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	int	flags;
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	int	status;
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	long	rlen;
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	uchar	sense[256];
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};
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enum {
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	SDnosense	= 0x00000001,
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	SDvalidsense	= 0x00010000,
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	SDinq0periphqual= 0xe0,
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	SDinq0periphtype= 0x1f,
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	SDinq1removable	= 0x80,
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	/* periphtype values */
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	SDperdisk	= 0,	/* Direct access (disk) */
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	SDpertape	= 1,	/* Sequential eg, tape */
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	SDperpr		= 2,	/* Printer */
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	SDperworm	= 4,	/* Worm */
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	SDpercd		= 5,	/* CD-ROM */
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	SDpermo		= 7,	/* rewriteable MO */
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	SDperjuke	= 8,	/* medium-changer */
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};
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enum {
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	SDretry		= -5,		/* internal to controllers */
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	SDmalloc	= -4,
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	SDeio		= -3,
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	SDtimeout	= -2,
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	SDnostatus	= -1,
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	SDok		= 0,
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	SDcheck		= 0x02,		/* check condition */
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	SDbusy		= 0x08,		/* busy */
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	SDmaxio		= 2048*1024,
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	SDnpart		= 16,
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};
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/*
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 * Allow the default #defines for sdmalloc & sdfree to be overridden by
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 * system-specific versions.  This can be used to avoid extra copying
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 * by making sure sd buffers are cache-aligned (some ARM systems) or
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 * page-aligned (xen) for DMA.
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 */
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#ifndef sdmalloc
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#define sdmalloc(n)	malloc(n)
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#define sdfree(p)	free(p)
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#endif
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/*
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 * mmc/sd/sdio host controller interface
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 */
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struct SDio {
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	char	*name;
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	int	(*init)(void);
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	void	(*enable)(void);
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	int	(*inquiry)(char*, int);
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	int	(*cmd)(u32int, u32int, u32int*);
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	void	(*iosetup)(int, void*, int, int);
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	void	(*io)(int, uchar*, int);
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};
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extern SDio sdio;
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/* devsd.c */
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extern void sdadddevs(SDev*);
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extern void sdaddconf(SDunit*);
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extern void sdaddallconfs(void (*f)(SDunit*));
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extern void sdaddpart(SDunit*, char*, uvlong, uvlong);
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extern int sdsetsense(SDreq*, int, int, int, int);
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extern int sdmodesense(SDreq*, uchar*, void*, int);
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extern int sdfakescsi(SDreq*, void*, int);
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/* sdscsi.c */
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extern int scsiverify(SDunit*);
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extern int scsionline(SDunit*);
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extern long scsibio(SDunit*, int, int, void*, long, uvlong);
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extern SDev* scsiid(SDev*, SDifc*);