1991/0112/port/devwren.c (diff list | history)

1991/0110/sys/src/9/port/devwren.c:9,31 – 1991/0112/sys/src/9/port/devwren.c:9,47 (short | long | prev | next)
1991/0110		#include "scsi.h"
1991/0112		typedef struct Part Part; typedef struct Disk Disk;
1991/0110		enum { Qdir, Qdata, Qstruct, };
1991/0112		Npart= 2, /* maximum partitions per disk */ Ndisk= 64, /* maximum disks */
1991/0110		static Dirtab wrendir[]={ "data", {Qdata}, 0, 0600, "struct", {Qstruct}, 8, 0400,
1991/0112		Qdir= 0, Qdata= 16, Qstruct= 32, Mask= 0x7,
1991/0110		}; #define NWREN (sizeof wrendir/sizeof(Dirtab))
1991/0112		static Dirtab *wrendir; #define NWREN (2*(Npart+1))
1991/0110		static long maxblock[64]; static long blocksize[64];
1991/0112		struct Part { ulong firstblock; ulong maxblock; }; struct Disk { ulong blocksize; Part p[Npart]; };
1991/0110		static Scsi staticcmd; /* BUG */ static uchar datablk[4*512]; /* BUG */
1991/0112		static Disk wren[Ndisk];
1991/0110
1991/0112		static Scsi staticcmd; /* BUG */ static uchar datablk[2*4*512]; /* BUG */
1991/0110		/* * accepts [0-7].[0-7], or abbreviation */
1991/0110/sys/src/9/port/devwren.c:50,55 – 1991/0112/sys/src/9/port/devwren.c:66,73
1991/0110		if (p[3]!=0) goto cant; out:
1991/0112		if(dev >= Ndisk) error(Ebadarg);
1991/0110		return dev; cant: error(Ebadarg);
1991/0110/sys/src/9/port/devwren.c:59,71 – 1991/0112/sys/src/9/port/devwren.c:77,97
1991/0110		wrengen(Chan *c, Dirtab *tab, long ntab, long s, Dir *dp) { long l; if(tab==0 || s>=ntab)
1991/0112		Part *p; Disk *d; if(s >= ntab)
1991/0110		return -1; tab+=s; if (tab->qid.path==Qdata && 0<=c->dev && c->dev<64) l = maxblock[c->dev]*blocksize[c->dev];
1991/0112		if(c->dev >= Ndisk) return -1; tab += s; d = &wren[c->dev]; p = &d->p[tab->qid.path&Mask]; if((tab->qid.path&~Mask) == Qdata) l = d->blocksize * (p->maxblock - p->firstblock);
1991/0110		else l = tab->length;
1991/0112		l = 8;
1991/0110		devdir(c, tab->qid, tab->name, l, tab->perm, dp); return 1; }
1991/0110/sys/src/9/port/devwren.c:72,79 – 1991/0112/sys/src/9/port/devwren.c:98,128
1991/0110		void wrenreset(void) {}
1991/0112		{ Dirtab *p; int i;
1991/0110
1991/0112		p = wrendir = ialloc((Npart+1) * 2 * sizeof(Dirtab), 0); for(i = 0; i < Npart; i++){ sprint(p->name, "data%d", i); p->qid.path = Qdata + i; p->perm = 0600; p++->length = 0; strcpy(p->name, "struct%d"); p->qid.path = Qstruct + i; p->perm = 0600; p++->length = 0; } strcpy(p->name, "data"); p->qid.path = Qdata + Npart; p->perm = 0600; p++->length = 0; strcpy(p->name, "struct"); p->qid.path = Qstruct + Npart; p->perm = 0600; p->length = 0; }
1991/0110		void wreninit(void) {
1991/0110/sys/src/9/port/devwren.c:91,96 – 1991/0112/sys/src/9/port/devwren.c:140,149
1991/0110		uchar buf[32]; int dev; Chan *c;
1991/0112		Disk *d; ulong plen; int i;
1991/0110		dev = wrendev(param); scsiready(dev); scsisense(dev, buf);
1991/0110/sys/src/9/port/devwren.c:97,104 – 1991/0112/sys/src/9/port/devwren.c:150,165
1991/0110		scsicap(dev, buf); c = devattach('r', param); c->dev = dev; maxblock[dev] = BGLONG(&buf[0]); blocksize[dev] = BGLONG(&buf[4]);
1991/0112		d = &wren[dev]; d->blocksize = BGLONG(&buf[4]); plen = BGLONG(&buf[0]); d->p[Npart].firstblock = 0; d->p[Npart].maxblock = plen; plen = plen/Npart; for(i = 0; i < Npart; i++){ d->p[i].firstblock = i*plen; d->p[i].maxblock = (i+1)*plen; }
1991/0110		return c; }
1991/0110/sys/src/9/port/devwren.c:145,160 – 1991/0112/sys/src/9/port/devwren.c:206,228
1991/0110		{ Scsi *cmd = &staticcmd; unsigned long lbn;
1991/0112		Part *p; Disk *d;
1991/0110		if (n == 0) return 0; switch ((int)(c->qid.path & ~CHDIR)) { case Qdir:
1991/0112		if(c->qid.path == CHDIR)
1991/0110		return devdirread(c, a, n, wrendir, NWREN, wrengen);
1991/0112		d = &wren[c->dev]; p = &(d->p[Mask&c->qid.path]); switch ((int)(c->qid.path & ~Mask)) {
1991/0110		case Qdata: if (n % blocksize[c->dev] || c->offset % blocksize[c->dev])
1991/0112		if (n % d->blocksize || c->offset % d->blocksize)
1991/0110		error(Ebadarg); lbn = c->offset/blocksize[c->dev]; if (lbn >= maxblock[c->dev])
1991/0112		lbn = (c->offset/d->blocksize) + p->firstblock; if (lbn >= p->maxblock)
1991/0110		error(Ebadarg); if (n > sizeof datablk) n = sizeof datablk;
1991/0110/sys/src/9/port/devwren.c:170,176 – 1991/0112/sys/src/9/port/devwren.c:238,244
1991/0110		cmd->cmdblk[1] = lbn>>16; cmd->cmdblk[2] = lbn>>8; cmd->cmdblk[3] = lbn; cmd->cmdblk[4] = n/blocksize[c->dev];
1991/0112		cmd->cmdblk[4] = n/d->blocksize;
1991/0110		cmd->cmdblk[5] = 0x00; cmd->cmd.lim = &cmd->cmdblk[6]; cmd->data.lim = cmd->data.base + n;
1991/0110/sys/src/9/port/devwren.c:187,194 – 1991/0112/sys/src/9/port/devwren.c:255,262
1991/0110		if (c->offset >= 8) return 0; n = 8; PLONG((uchar *)&a[0], maxblock[c->dev]); PLONG((uchar *)&a[4], blocksize[c->dev]);
1991/0112		PLONG((uchar *)&a[0], p->maxblock - p->firstblock); PLONG((uchar *)&a[4], d->blocksize);
1991/0110		break; default: panic("wrenread");
1991/0110/sys/src/9/port/devwren.c:201,214 – 1991/0112/sys/src/9/port/devwren.c:269,288
1991/0110		{ Scsi *cmd = &staticcmd; unsigned long lbn;
1991/0112		Part *p; Disk *d;
1991/0110		if (n == 0) return 0; switch ((int)(c->qid.path & ~CHDIR)) {
1991/0112		d = &wren[c->dev]; p = &(d->p[Mask&c->qid.path]); switch ((int)(c->qid.path & ~Mask)) {
1991/0110		case Qdata: if (n % blocksize[c->dev] || c->offset % blocksize[c->dev])
1991/0112		if (n % d->blocksize || c->offset % d->blocksize)
1991/0110		error(Ebadarg); lbn = c->offset/blocksize[c->dev]; if (lbn >= maxblock[c->dev])
1991/0112		lbn = c->offset/d->blocksize + p->firstblock; if (lbn >= p->maxblock)
1991/0110		error(Ebadarg); if (n > sizeof datablk) n = sizeof datablk;
1991/0110/sys/src/9/port/devwren.c:224,230 – 1991/0112/sys/src/9/port/devwren.c:298,304
1991/0110		cmd->cmdblk[1] = lbn>>16; cmd->cmdblk[2] = lbn>>8; cmd->cmdblk[3] = lbn; cmd->cmdblk[4] = n/blocksize[c->dev];
1991/0112		cmd->cmdblk[4] = n/d->blocksize;
1991/0110		cmd->cmdblk[5] = 0x00; cmd->cmd.lim = &cmd->cmdblk[6]; cmd->data.lim = cmd->data.base + n;