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- /*
- * Storage Device.
- */
- #include "u.h"
- #include "../port/lib.h"
- #include "mem.h"
- #include "dat.h"
- #include "fns.h"
- #include "io.h"
- #include "ureg.h"
- #include "../port/error.h"
- #include "../port/sd.h"
- extern Dev sddevtab;
- extern SDifc* sdifc[];
- typedef struct {
- SDev* dt_dev;
- int dt_nunits; /* num units in dev */
- } dev_t;
- static dev_t* devs; /* all devices */
- static QLock devslock; /* insertion and removal of devices */
- static int ndevs; /* total number of devices in the system */
- enum {
- Rawcmd,
- Rawdata,
- Rawstatus,
- };
- enum {
- Qtopdir = 1, /* top level directory */
- Qtopbase,
- Qtopctl = Qtopbase,
- Qtopstat,
- Qunitdir, /* directory per unit */
- Qunitbase,
- Qctl = Qunitbase,
- Qraw,
- Qpart,
- TypeLOG = 4,
- NType = (1<<TypeLOG),
- TypeMASK = (NType-1),
- TypeSHIFT = 0,
- PartLOG = 8,
- NPart = (1<<PartLOG),
- PartMASK = (NPart-1),
- PartSHIFT = TypeLOG,
- UnitLOG = 8,
- NUnit = (1<<UnitLOG),
- UnitMASK = (NUnit-1),
- UnitSHIFT = (PartLOG+TypeLOG),
- DevLOG = 8,
- NDev = (1 << DevLOG),
- DevMASK = (NDev-1),
- DevSHIFT = (UnitLOG+PartLOG+TypeLOG),
- Ncmd = 20,
- };
- #define TYPE(q) ((((ulong)(q).path)>>TypeSHIFT) & TypeMASK)
- #define PART(q) ((((ulong)(q).path)>>PartSHIFT) & PartMASK)
- #define UNIT(q) ((((ulong)(q).path)>>UnitSHIFT) & UnitMASK)
- #define DEV(q) ((((ulong)(q).path)>>DevSHIFT) & DevMASK)
- #define QID(d,u, p, t) (((d)<<DevSHIFT)|((u)<<UnitSHIFT)|\
- ((p)<<PartSHIFT)|((t)<<TypeSHIFT))
- static void
- sdaddpart(SDunit* unit, char* name, ulong start, ulong end)
- {
- SDpart *pp;
- int i, partno;
- /*
- * Check name not already used
- * and look for a free slot.
- */
- if(unit->part != nil){
- partno = -1;
- for(i = 0; i < unit->npart; i++){
- pp = &unit->part[i];
- if(!pp->valid){
- if(partno == -1)
- partno = i;
- break;
- }
- if(strcmp(name, pp->name) == 0){
- if(pp->start == start && pp->end == end)
- return;
- error(Ebadctl);
- }
- }
- }
- else{
- if((unit->part = malloc(sizeof(SDpart)*SDnpart)) == nil)
- error(Enomem);
- unit->npart = SDnpart;
- partno = 0;
- }
- /*
- * If no free slot found then increase the
- * array size (can't get here with unit->part == nil).
- */
- if(partno == -1){
- if(unit->npart >= NPart)
- error(Enomem);
- if((pp = malloc(sizeof(SDpart)*(unit->npart+SDnpart))) == nil)
- error(Enomem);
- memmove(pp, unit->part, sizeof(SDpart)*unit->npart);
- free(unit->part);
- unit->part = pp;
- partno = unit->npart;
- unit->npart += SDnpart;
- }
- /*
- * Check size and extent are valid.
- */
- if(start > end || end > unit->sectors)
- error(Eio);
- pp = &unit->part[partno];
- pp->start = start;
- pp->end = end;
- kstrdup(&pp->name, name);
- kstrdup(&pp->user, eve);
- pp->perm = 0640;
- pp->valid = 1;
- }
- static void
- sddelpart(SDunit* unit, char* name)
- {
- int i;
- SDpart *pp;
- /*
- * Look for the partition to delete.
- * Can't delete if someone still has it open.
- */
- pp = unit->part;
- for(i = 0; i < unit->npart; i++){
- if(strcmp(name, pp->name) == 0)
- break;
- pp++;
- }
- if(i >= unit->npart)
- error(Ebadctl);
- if(strcmp(up->user, pp->user) && !iseve())
- error(Eperm);
- pp->valid = 0;
- pp->vers++;
- }
- static int
- sdinitpart(SDunit* unit)
- {
- int i, nf;
- ulong start, end;
- char *f[4], *p, *q, buf[10];
- unit->vers++;
- unit->sectors = unit->secsize = 0;
- if(unit->part){
- for(i = 0; i < unit->npart; i++){
- unit->part[i].valid = 0;
- unit->part[i].vers++;
- }
- }
- if(unit->inquiry[0] & 0xC0)
- return 0;
- switch(unit->inquiry[0] & 0x1F){
- case 0x00: /* DA */
- case 0x04: /* WORM */
- case 0x05: /* CD-ROM */
- case 0x07: /* MO */
- break;
- default:
- return 0;
- }
- if(unit->dev->ifc->online)
- unit->dev->ifc->online(unit);
- if(unit->sectors){
- sdaddpart(unit, "data", 0, unit->sectors);
-
- /*
- * Use partitions passed from boot program,
- * e.g.
- * sdC0part=dos 63 123123/plan9 123123 456456
- * This happens before /boot sets hostname so the
- * partitions will have the null-string for user.
- * The gen functions patch it up.
- */
- snprint(buf, sizeof buf, "%spart", unit->name);
- for(p = getconf(buf); p != nil; p = q){
- if(q = strchr(p, '/'))
- *q++ = '\0';
- nf = tokenize(p, f, nelem(f));
- if(nf < 3)
- continue;
-
- start = strtoul(f[1], 0, 0);
- end = strtoul(f[2], 0, 0);
- if(!waserror()){
- sdaddpart(unit, f[0], start, end);
- poperror();
- }
- }
- }
- return 1;
- }
- static SDev*
- sdgetdev(int idno)
- {
- SDev *sdev;
- int i;
- qlock(&devslock);
- for(i = 0; i != ndevs; i++)
- if (devs[i].dt_dev->idno == idno)
- break;
-
- if(i == ndevs)
- sdev = nil;
- else{
- sdev = devs[i].dt_dev;
- incref(&sdev->r);
- }
- qunlock(&devslock);
- return sdev;
- }
- static SDunit*
- sdgetunit(SDev* sdev, int subno)
- {
- SDunit *unit;
- char buf[32];
- /*
- * Associate a unit with a given device and sub-unit
- * number on that device.
- * The device will be probed if it has not already been
- * successfully accessed.
- */
- qlock(&sdev->unitlock);
- if(subno > sdev->nunit){
- qunlock(&sdev->unitlock);
- return nil;
- }
- unit = sdev->unit[subno];
- if(unit == nil){
- /*
- * Probe the unit only once. This decision
- * may be a little severe and reviewed later.
- */
- if(sdev->unitflg[subno]){
- qunlock(&sdev->unitlock);
- return nil;
- }
- if((unit = malloc(sizeof(SDunit))) == nil){
- qunlock(&sdev->unitlock);
- return nil;
- }
- sdev->unitflg[subno] = 1;
- if(sdev->enabled == 0 && sdev->ifc->enable)
- sdev->ifc->enable(sdev);
- sdev->enabled = 1;
- snprint(buf, sizeof(buf), "%s%d", sdev->name, subno);
- kstrdup(&unit->name, buf);
- kstrdup(&unit->user, eve);
- unit->perm = 0555;
- unit->subno = subno;
- unit->dev = sdev;
- /*
- * No need to lock anything here as this is only
- * called before the unit is made available in the
- * sdunit[] array.
- */
- if(unit->dev->ifc->verify(unit) == 0){
- qunlock(&sdev->unitlock);
- free(unit);
- return nil;
- }
- sdev->unit[subno] = unit;
- }
- qunlock(&sdev->unitlock);
- return unit;
- }
- static void
- sdreset(void)
- {
- int i;
- SDev *sdev, *tail, *sdlist;
- /*
- * Probe all configured controllers and make a list
- * of devices found, accumulating a possible maximum number
- * of units attached and marking each device with an index
- * into the linear top-level directory array of units.
- */
- tail = sdlist = nil;
- for(i = 0; sdifc[i] != nil; i++){
- if(sdifc[i]->pnp == nil || (sdev = sdifc[i]->pnp()) == nil)
- continue;
- if(sdlist != nil)
- tail->next = sdev;
- else
- sdlist = sdev;
- for(tail = sdev; tail->next != nil; tail = tail->next){
- tail->unit = (SDunit**)malloc(tail->nunit * sizeof(SDunit*));
- tail->unitflg = (int*)malloc(tail->nunit * sizeof(int));
- assert(tail->unit && tail->unitflg);
- ndevs++;
- }
- tail->unit = (SDunit**)malloc(tail->nunit * sizeof(SDunit*));
- tail->unitflg = (int*)malloc(tail->nunit * sizeof(int));
- ndevs++;
- }
-
- /*
- * Legacy and option code goes here. This will be hard...
- */
- /*
- * The maximum number of possible units is known, allocate
- * placeholders for their datastructures; the units will be
- * probed and structures allocated when attached.
- * Allocate controller names for the different types.
- */
- if(ndevs == 0)
- return;
- for(i = 0; sdifc[i] != nil; i++){
- /*
- * BUG: no check is made here or later when a
- * unit is attached that the id and name are set.
- */
- if(sdifc[i]->id)
- sdifc[i]->id(sdlist);
- }
- /*
- * The IDs have been set, unlink the sdlist and copy the spec to
- * the devtab.
- */
- devs = (dev_t*)malloc(ndevs * sizeof(dev_t));
- memset(devs, 0, ndevs * sizeof(dev_t));
- i = 0;
- while(sdlist != nil){
- devs[i].dt_dev = sdlist;
- devs[i].dt_nunits = sdlist->nunit;
- sdlist = sdlist->next;
- devs[i].dt_dev->next = nil;
- i++;
- }
- }
- static int
- sd2gen(Chan* c, int i, Dir* dp)
- {
- Qid q;
- vlong l;
- SDpart *pp;
- SDperm *perm;
- SDunit *unit;
- SDev *sdev;
- int rv;
- sdev = sdgetdev(DEV(c->qid));
- assert(sdev);
- unit = sdev->unit[UNIT(c->qid)];
- rv = -1;
- switch(i){
- case Qctl:
- mkqid(&q, QID(DEV(c->qid), UNIT(c->qid), PART(c->qid), Qctl),
- unit->vers, QTFILE);
- perm = &unit->ctlperm;
- if(emptystr(perm->user)){
- kstrdup(&perm->user, eve);
- perm->perm = 0640;
- }
- devdir(c, q, "ctl", 0, perm->user, perm->perm, dp);
- rv = 1;
- break;
- case Qraw:
- mkqid(&q, QID(DEV(c->qid), UNIT(c->qid), PART(c->qid), Qraw),
- unit->vers, QTFILE);
- perm = &unit->rawperm;
- if(emptystr(perm->user)){
- kstrdup(&perm->user, eve);
- perm->perm = DMEXCL|0600;
- }
- devdir(c, q, "raw", 0, perm->user, perm->perm, dp);
- rv = 1;
- break;
- case Qpart:
- pp = &unit->part[PART(c->qid)];
- l = (pp->end - pp->start) * (vlong)unit->secsize;
- mkqid(&q, QID(DEV(c->qid), UNIT(c->qid), PART(c->qid), Qpart),
- unit->vers+pp->vers, QTFILE);
- if(emptystr(pp->user))
- kstrdup(&pp->user, eve);
- devdir(c, q, pp->name, l, pp->user, pp->perm, dp);
- rv = 1;
- break;
- }
-
- decref(&sdev->r);
- return rv;
- }
- static int
- sd1gen(Chan* c, int i, Dir* dp)
- {
- Qid q;
- switch(i){
- case Qtopctl:
- mkqid(&q, QID(0, 0, 0, Qtopctl), 0, QTFILE);
- devdir(c, q, "sdctl", 0, eve, 0640, dp);
- return 1;
- case Qtopstat:
- mkqid(&q, QID(0, 0, 0, Qtopstat), 0, QTFILE);
- devdir(c, q, "sdstat", 0, eve, 0640, dp);
- return 1;
- }
- return -1;
- }
- static int
- sdgen(Chan* c, char*, Dirtab*, int, int s, Dir* dp)
- {
- Qid q;
- vlong l;
- int i, r;
- SDpart *pp;
- SDunit *unit;
- SDev *sdev;
- switch(TYPE(c->qid)){
- case Qtopdir:
- if(s == DEVDOTDOT){
- mkqid(&q, QID(0, s, 0, Qtopdir), 0, QTDIR);
- sprint(up->genbuf, "#%C", sddevtab.dc);
- devdir(c, q, up->genbuf, 0, eve, 0555, dp);
- return 1;
- }
- if(s == 0 || s == 1)
- return sd1gen(c, s + Qtopbase, dp);
- s -= 2;
- qlock(&devslock);
- for(i = 0; i != ndevs; i++){
- if (s < devs[i].dt_nunits)
- break;
- s -= devs[i].dt_nunits;
- }
-
- if(i == ndevs){
- /* Run of the end of the list */
- qunlock(&devslock);
- return -1;
- }
- if ((sdev = devs[i].dt_dev) == nil){
- qunlock(&devslock);
- return 0;
- }
- incref(&sdev->r);
- qunlock(&devslock);
- if((unit = sdev->unit[s]) == nil)
- if((unit = sdgetunit(sdev, s)) == nil){
- decref(&sdev->r);
- return 0;
- }
- mkqid(&q, QID(sdev->idno, s, 0, Qunitdir), 0, QTDIR);
- if(emptystr(unit->user))
- kstrdup(&unit->user, eve);
- devdir(c, q, unit->name, 0, unit->user, unit->perm, dp);
- decref(&sdev->r);
- return 1;
- case Qunitdir:
- if(s == DEVDOTDOT){
- mkqid(&q, QID(0, s, 0, Qtopdir), 0, QTDIR);
- sprint(up->genbuf, "#%C", sddevtab.dc);
- devdir(c, q, up->genbuf, 0, eve, 0555, dp);
- return 1;
- }
-
- if((sdev = sdgetdev(DEV(c->qid))) == nil){
- devdir(c, q, "unavailable", 0, eve, 0, dp);
- return 1;
- }
- unit = sdev->unit[UNIT(c->qid)];
- qlock(&unit->ctl);
- /*
- * Check for media change.
- * If one has already been detected, sectors will be zero.
- * If there is one waiting to be detected, online
- * will return > 1.
- * Online is a bit of a large hammer but does the job.
- */
- if(unit->sectors == 0
- || (unit->dev->ifc->online && unit->dev->ifc->online(unit) > 1))
- sdinitpart(unit);
- i = s+Qunitbase;
- if(i < Qpart){
- r = sd2gen(c, i, dp);
- qunlock(&unit->ctl);
- decref(&sdev->r);
- return r;
- }
- i -= Qpart;
- if(unit->part == nil || i >= unit->npart){
- qunlock(&unit->ctl);
- decref(&sdev->r);
- break;
- }
- pp = &unit->part[i];
- if(!pp->valid){
- qunlock(&unit->ctl);
- decref(&sdev->r);
- return 0;
- }
- l = (pp->end - pp->start) * (vlong)unit->secsize;
- mkqid(&q, QID(DEV(c->qid), UNIT(c->qid), i, Qpart),
- unit->vers+pp->vers, QTFILE);
- if(emptystr(pp->user))
- kstrdup(&pp->user, eve);
- devdir(c, q, pp->name, l, pp->user, pp->perm, dp);
- qunlock(&unit->ctl);
- decref(&sdev->r);
- return 1;
- case Qraw:
- case Qctl:
- case Qpart:
- if((sdev = sdgetdev(DEV(c->qid))) == nil){
- devdir(c, q, "unavailable", 0, eve, 0, dp);
- return 1;
- }
- unit = sdev->unit[UNIT(c->qid)];
- qlock(&unit->ctl);
- r = sd2gen(c, TYPE(c->qid), dp);
- qunlock(&unit->ctl);
- decref(&sdev->r);
- return r;
- case Qtopctl:
- case Qtopstat:
- return sd1gen(c, TYPE(c->qid), dp);
- default:
- break;
- }
- return -1;
- }
- static Chan*
- sdattach(char* spec)
- {
- Chan *c;
- char *p;
- SDev *sdev;
- int idno, subno, i;
- if(ndevs == 0 || *spec == '\0'){
- c = devattach(sddevtab.dc, spec);
- mkqid(&c->qid, QID(0, 0, 0, Qtopdir), 0, QTDIR);
- return c;
- }
- if(spec[0] != 's' || spec[1] != 'd')
- error(Ebadspec);
- idno = spec[2];
- subno = strtol(&spec[3], &p, 0);
- if(p == &spec[3])
- error(Ebadspec);
- qlock(&devslock);
- for (sdev = nil, i = 0; i != ndevs; i++)
- if ((sdev = devs[i].dt_dev) != nil && sdev->idno == idno)
- break;
- if(i == ndevs || subno >= sdev->nunit || sdgetunit(sdev, subno) == nil){
- qunlock(&devslock);
- error(Enonexist);
- }
- incref(&sdev->r);
- qunlock(&devslock);
- c = devattach(sddevtab.dc, spec);
- mkqid(&c->qid, QID(sdev->idno, subno, 0, Qunitdir), 0, QTDIR);
- c->dev = (sdev->idno << UnitLOG) + subno;
- decref(&sdev->r);
- return c;
- }
- static Walkqid*
- sdwalk(Chan* c, Chan* nc, char** name, int nname)
- {
- return devwalk(c, nc, name, nname, nil, 0, sdgen);
- }
- static int
- sdstat(Chan* c, uchar* db, int n)
- {
- return devstat(c, db, n, nil, 0, sdgen);
- }
- static Chan*
- sdopen(Chan* c, int omode)
- {
- SDpart *pp;
- SDunit *unit;
- SDev *sdev;
- uchar tp;
- c = devopen(c, omode, 0, 0, sdgen);
- if((tp = TYPE(c->qid)) != Qctl && tp != Qraw && tp != Qpart)
- return c;
- sdev = sdgetdev(DEV(c->qid));
- if(sdev == nil)
- error(Enonexist);
- unit = sdev->unit[UNIT(c->qid)];
- switch(TYPE(c->qid)){
- case Qctl:
- c->qid.vers = unit->vers;
- break;
- case Qraw:
- c->qid.vers = unit->vers;
- if(tas(&unit->rawinuse) != 0){
- c->flag &= ~COPEN;
- error(Einuse);
- }
- unit->state = Rawcmd;
- break;
- case Qpart:
- qlock(&unit->ctl);
- if(waserror()){
- qunlock(&unit->ctl);
- c->flag &= ~COPEN;
- nexterror();
- }
- pp = &unit->part[PART(c->qid)];
- c->qid.vers = unit->vers+pp->vers;
- qunlock(&unit->ctl);
- poperror();
- break;
- }
- decref(&sdev->r);
- return c;
- }
- static void
- sdclose(Chan* c)
- {
- SDunit *unit;
- SDev *sdev;
- if(c->qid.type & QTDIR)
- return;
- if(!(c->flag & COPEN))
- return;
- switch(TYPE(c->qid)){
- default:
- break;
- case Qraw:
- sdev = sdgetdev(DEV(c->qid));
- if (sdev) {
- unit = sdev->unit[UNIT(c->qid)];
- unit->rawinuse = 0;
- decref(&sdev->r);
- }
- break;
- }
- }
- static long
- sdbio(Chan* c, int write, char* a, long len, vlong off)
- {
- int nchange;
- long l;
- uchar *b;
- SDpart *pp;
- SDunit *unit;
- SDev *sdev;
- ulong bno, max, nb, offset;
- sdev = sdgetdev(DEV(c->qid));
- if(sdev == nil)
- error(Enonexist);
- unit = sdev->unit[UNIT(c->qid)];
- if(unit == nil)
- error(Enonexist);
- nchange = 0;
- qlock(&unit->ctl);
- while(waserror()){
- /* notification of media change; go around again */
- if(strcmp(up->errstr, Eio) == 0 && unit->sectors == 0 && nchange++ == 0){
- sdinitpart(unit);
- continue;
- }
- /* other errors; give up */
- qunlock(&unit->ctl);
- decref(&sdev->r);
- nexterror();
- }
- pp = &unit->part[PART(c->qid)];
- if(unit->vers+pp->vers != c->qid.vers)
- error(Eio);
- /*
- * Check the request is within bounds.
- * Removeable drives are locked throughout the I/O
- * in case the media changes unexpectedly.
- * Non-removeable drives are not locked during the I/O
- * to allow the hardware to optimise if it can; this is
- * a little fast and loose.
- * It's assumed that non-removeable media parameters
- * (sectors, secsize) can't change once the drive has
- * been brought online.
- */
- bno = (off/unit->secsize) + pp->start;
- nb = ((off+len+unit->secsize-1)/unit->secsize) + pp->start - bno;
- max = SDmaxio/unit->secsize;
- if(nb > max)
- nb = max;
- if(bno+nb > pp->end)
- nb = pp->end - bno;
- if(bno >= pp->end || nb == 0){
- if(write)
- error(Eio);
- qunlock(&unit->ctl);
- decref(&sdev->r);
- poperror();
- return 0;
- }
- if(!(unit->inquiry[1] & 0x80)){
- qunlock(&unit->ctl);
- poperror();
- }
- b = sdmalloc(nb*unit->secsize);
- if(b == nil)
- error(Enomem);
- if(waserror()){
- sdfree(b);
- if(!(unit->inquiry[1] & 0x80))
- decref(&sdev->r); /* gadverdamme! */
- nexterror();
- }
- offset = off%unit->secsize;
- if(offset+len > nb*unit->secsize)
- len = nb*unit->secsize - offset;
- if(write){
- if(offset || (len%unit->secsize)){
- l = unit->dev->ifc->bio(unit, 0, 0, b, nb, bno);
- if(l < 0)
- error(Eio);
- if(l < (nb*unit->secsize)){
- nb = l/unit->secsize;
- l = nb*unit->secsize - offset;
- if(len > l)
- len = l;
- }
- }
- memmove(b+offset, a, len);
- l = unit->dev->ifc->bio(unit, 0, 1, b, nb, bno);
- if(l < 0)
- error(Eio);
- if(l < offset)
- len = 0;
- else if(len > l - offset)
- len = l - offset;
- }
- else{
- l = unit->dev->ifc->bio(unit, 0, 0, b, nb, bno);
- if(l < 0)
- error(Eio);
- if(l < offset)
- len = 0;
- else if(len > l - offset)
- len = l - offset;
- memmove(a, b+offset, len);
- }
- sdfree(b);
- poperror();
- if(unit->inquiry[1] & 0x80){
- qunlock(&unit->ctl);
- poperror();
- }
- decref(&sdev->r);
- return len;
- }
- static long
- sdrio(SDreq* r, void* a, long n)
- {
- void *data;
- if(n >= SDmaxio || n < 0)
- error(Etoobig);
- data = nil;
- if(n){
- if((data = sdmalloc(n)) == nil)
- error(Enomem);
- if(r->write)
- memmove(data, a, n);
- }
- r->data = data;
- r->dlen = n;
- if(waserror()){
- if(data != nil){
- sdfree(data);
- r->data = nil;
- }
- nexterror();
- }
- if(r->unit->dev->ifc->rio(r) != SDok)
- error(Eio);
- if(!r->write && r->rlen > 0)
- memmove(a, data, r->rlen);
- if(data != nil){
- sdfree(data);
- r->data = nil;
- }
- poperror();
- return r->rlen;
- }
- static long
- sdread(Chan *c, void *a, long n, vlong off)
- {
- char *p, *e, *buf;
- SDpart *pp;
- SDunit *unit;
- SDev *sdev;
- ulong offset;
- int i, l, status;
- offset = off;
- switch(TYPE(c->qid)){
- default:
- error(Eperm);
- case Qtopstat:
- p = buf = malloc(READSTR);
- assert(p);
- e = p + READSTR;
- qlock(&devslock);
- for(i = 0; i != ndevs; i++){
- SDev *sdev = devs[i].dt_dev;
- if(sdev->ifc->stat)
- p = sdev->ifc->stat(sdev, p, e);
- else
- p = seprint(e, "%s; no statistics available\n", sdev->name);
- }
- qunlock(&devslock);
- n = readstr(off, a, n, buf);
- free(buf);
- return n;
- case Qtopdir:
- case Qunitdir:
- return devdirread(c, a, n, 0, 0, sdgen);
- case Qctl:
- sdev = sdgetdev(DEV(c->qid));
- if (sdev == nil)
- error(Enonexist);
- unit = sdev->unit[UNIT(c->qid)];
- p = malloc(READSTR);
- l = snprint(p, READSTR, "inquiry %.48s\n",
- (char*)unit->inquiry+8);
- qlock(&unit->ctl);
- /*
- * If there's a device specific routine it must
- * provide all information pertaining to night geometry
- * and the garscadden trains.
- */
- if(unit->dev->ifc->rctl)
- l += unit->dev->ifc->rctl(unit, p+l, READSTR-l);
- if(unit->sectors == 0)
- sdinitpart(unit);
- if(unit->sectors){
- if(unit->dev->ifc->rctl == nil)
- l += snprint(p+l, READSTR-l,
- "geometry %ld %ld\n",
- unit->sectors, unit->secsize);
- pp = unit->part;
- for(i = 0; i < unit->npart; i++){
- if(pp->valid)
- l += snprint(p+l, READSTR-l,
- "part %s %lud %lud\n",
- pp->name, pp->start, pp->end);
- pp++;
- }
- }
- qunlock(&unit->ctl);
- decref(&sdev->r);
- l = readstr(offset, a, n, p);
- free(p);
- return l;
- case Qraw:
- sdev = sdgetdev(DEV(c->qid));
- if (sdev == nil)
- error(Enonexist);
- unit = sdev->unit[UNIT(c->qid)];
- qlock(&unit->raw);
- if(waserror()){
- qunlock(&unit->raw);
- decref(&sdev->r);
- nexterror();
- }
- if(unit->state == Rawdata){
- unit->state = Rawstatus;
- i = sdrio(unit->req, a, n);
- }
- else if(unit->state == Rawstatus){
- status = unit->req->status;
- unit->state = Rawcmd;
- free(unit->req);
- unit->req = nil;
- i = readnum(0, a, n, status, NUMSIZE);
- } else
- i = 0;
- qunlock(&unit->raw);
- decref(&sdev->r);
- poperror();
- return i;
- case Qpart:
- return sdbio(c, 0, a, n, off);
- }
- return 0;
- }
- typedef struct {
- int o_on;
- char* o_spec;
- DevConf o_cf;
- } confdata_t;
- static void
- parse_switch(confdata_t* cd, char* option)
- {
- if(!strcmp("on", option))
- cd->o_on = 1;
- else if(!strcmp("off", option))
- cd->o_on = 0;
- else
- error(Ebadarg);
- }
- static void
- parse_spec(confdata_t* cd, char* option)
- {
- if(strlen(option) > 1)
- error(Ebadarg);
- cd->o_spec = option;
- }
- static port_t*
- getnewport(DevConf* dc)
- {
- port_t *p;
- p = (port_t *)malloc((dc->nports + 1) * sizeof(port_t));
- if(dc->nports > 0){
- memmove(p, dc->ports, dc->nports * sizeof(port_t));
- free(dc->ports);
- }
- dc->ports = p;
- p = &dc->ports[dc->nports++];
- p->size = -1;
- p->port = (ulong)-1;
- return p;
- }
- static void
- parse_port(confdata_t* cd, char* option)
- {
- char *e;
- port_t *p;
- if(cd->o_cf.nports == 0 || cd->o_cf.ports[cd->o_cf.nports-1].port != (ulong)-1)
- p = getnewport(&cd->o_cf);
- else
- p = &cd->o_cf.ports[cd->o_cf.nports-1];
- p->port = strtol(option, &e, 0);
- if(e == nil || *e != '\0')
- error(Ebadarg);
- }
- static void
- parse_size(confdata_t* cd, char* option)
- {
- char *e;
- port_t *p;
- if(cd->o_cf.nports == 0 || cd->o_cf.ports[cd->o_cf.nports-1].size != -1)
- p = getnewport(&cd->o_cf);
- else
- p = &cd->o_cf.ports[cd->o_cf.nports-1];
- p->size = (int)strtol(option, &e, 0);
- if(e == nil || *e != '\0')
- error(Ebadarg);
- }
- static void
- parse_irq(confdata_t* cd, char* option)
- {
- char *e;
- cd->o_cf.intnum = strtoul(option, &e, 0);
- if(e == nil || *e != '\0')
- error(Ebadarg);
- }
- static void
- parse_type(confdata_t* cd, char* option)
- {
- cd->o_cf.type = option;
- }
- static struct {
- char *option;
- void (*parse)(confdata_t*, char*);
- } options[] = {
- { "switch", parse_switch, },
- { "spec", parse_spec, },
- { "port", parse_port, },
- { "size", parse_size, },
- { "irq", parse_irq, },
- { "type", parse_type, },
- };
- static long
- sdwrite(Chan* c, void* a, long n, vlong off)
- {
- Cmdbuf *cb;
- SDreq *req;
- SDunit *unit;
- SDev *sdev;
- ulong end, start;
- switch(TYPE(c->qid)){
- default:
- error(Eperm);
- case Qtopctl: {
- confdata_t cd;
- char buf[256], *field[Ncmd];
- int nf, i, j;
- memset(&cd, 0, sizeof(confdata_t));
- if(n > sizeof(buf)-1) n = sizeof(buf)-1;
- memmove(buf, a, n);
- buf[n] = '\0';
- cd.o_on = -1;
- cd.o_spec = '\0';
- memset(&cd.o_cf, 0, sizeof(DevConf));
- nf = tokenize(buf, field, Ncmd);
- for(i = 0; i < nf; i++){
- char *opt = field[i++];
- if(i >= nf)
- error(Ebadarg);
- for(j = 0; j != nelem(options); j++)
- if(!strcmp(opt, options[j].option))
- break;
-
- if(j == nelem(options))
- error(Ebadarg);
- options[j].parse(&cd, field[i]);
- }
- if(cd.o_on < 0)
- error(Ebadarg);
- if(cd.o_on){
- if(cd.o_spec == '\0' || cd.o_cf.nports == 0 ||
- cd.o_cf.intnum == 0 || cd.o_cf.type == nil)
- error(Ebadarg);
- }
- else{
- if(cd.o_spec == '\0')
- error(Ebadarg);
- }
- if(sddevtab.config == nil)
- error("No configuration function");
- sddevtab.config(cd.o_on, cd.o_spec, &cd.o_cf);
- break;
- }
- case Qctl:
- cb = parsecmd(a, n);
- sdev = sdgetdev(DEV(c->qid));
- if (sdev == nil)
- error(Enonexist);
- unit = sdev->unit[UNIT(c->qid)];
- qlock(&unit->ctl);
- if(waserror()){
- qunlock(&unit->ctl);
- decref(&sdev->r);
- free(cb);
- nexterror();
- }
- if(unit->vers != c->qid.vers)
- error(Eio);
- if(cb->nf < 1)
- error(Ebadctl);
- if(strcmp(cb->f[0], "part") == 0){
- if(cb->nf != 4)
- error(Ebadctl);
- if(unit->sectors == 0 && !sdinitpart(unit))
- error(Eio);
- start = strtoul(cb->f[2], 0, 0);
- end = strtoul(cb->f[3], 0, 0);
- sdaddpart(unit, cb->f[1], start, end);
- }
- else if(strcmp(cb->f[0], "delpart") == 0){
- if(cb->nf != 2 || unit->part == nil)
- error(Ebadctl);
- sddelpart(unit, cb->f[1]);
- }
- else if(unit->dev->ifc->wctl)
- unit->dev->ifc->wctl(unit, cb);
- else
- error(Ebadctl);
- qunlock(&unit->ctl);
- decref(&sdev->r);
- poperror();
- free(cb);
- break;
- case Qraw:
- sdev = sdgetdev(DEV(c->qid));
- if(sdev == nil)
- error(Enonexist);
- unit = sdev->unit[UNIT(c->qid)];
- qlock(&unit->raw);
- if(waserror()){
- qunlock(&unit->raw);
- decref(&sdev->r);
- nexterror();
- }
- switch(unit->state){
- case Rawcmd:
- if(n < 6 || n > sizeof(req->cmd))
- error(Ebadarg);
- if((req = malloc(sizeof(SDreq))) == nil)
- error(Enomem);
- req->unit = unit;
- memmove(req->cmd, a, n);
- req->clen = n;
- req->flags = SDnosense;
- req->status = ~0;
- unit->req = req;
- unit->state = Rawdata;
- break;
- case Rawstatus:
- unit->state = Rawcmd;
- free(unit->req);
- unit->req = nil;
- error(Ebadusefd);
- case Rawdata:
- if(unit->state != Rawdata)
- error(Ebadusefd);
- unit->state = Rawstatus;
- unit->req->write = 1;
- n = sdrio(unit->req, a, n);
- }
- qunlock(&unit->raw);
- decref(&sdev->r);
- poperror();
- break;
- case Qpart:
- return sdbio(c, 1, a, n, off);
- }
- return n;
- }
- static int
- sdwstat(Chan* c, uchar* dp, int n)
- {
- Dir *d;
- SDpart *pp;
- SDperm *perm;
- SDunit *unit;
- SDev *sdev;
- if(c->qid.type & QTDIR)
- error(Eperm);
- sdev = sdgetdev(DEV(c->qid));
- if (sdev == nil)
- error(Enonexist);
- unit = sdev->unit[UNIT(c->qid)];
- qlock(&unit->ctl);
- d = nil;
- if(waserror()){
- free(d);
- qunlock(&unit->ctl);
- decref(&sdev->r);
- nexterror();
- }
- switch(TYPE(c->qid)){
- default:
- error(Eperm);
- case Qctl:
- perm = &unit->ctlperm;
- break;
- case Qraw:
- perm = &unit->rawperm;
- break;
- case Qpart:
- pp = &unit->part[PART(c->qid)];
- if(unit->vers+pp->vers != c->qid.vers)
- error(Enonexist);
- perm = &pp->SDperm;
- break;
- }
- if(strcmp(up->user, perm->user) && !iseve())
- error(Eperm);
- d = smalloc(sizeof(Dir)+n);
- n = convM2D(dp, n, &d[0], (char*)&d[1]);
- if(n == 0)
- error(Eshortstat);
- if(!emptystr(d[0].uid))
- kstrdup(&perm->user, d[0].uid);
- if(d[0].mode != ~0UL)
- perm->perm = (perm->perm & ~0777) | (d[0].mode & 0777);
- free(d);
- qunlock(&unit->ctl);
- decref(&sdev->r);
- poperror();
- return n;
- }
- static char
- getspec(char base)
- {
- while(1){
- int i;
- SDev *sdev;
- for(i = 0; i != ndevs; i++)
- if((sdev = devs[i].dt_dev) != nil && (char)sdev->idno == base)
- break;
- if(i == ndevs)
- return base;
- base++;
- }
- return '\0';
- }
- static int
- configure(char* spec, DevConf* cf)
- {
- ISAConf isa;
- dev_t *_devs;
- SDev *tail, *sdev, *(*probe)(DevConf*);
- char *p, name[32];
- int i, added_devs;
- if((p = strchr(cf->type, '/')) != nil)
- *p++ = '\0';
- for(i = 0; sdifc[i] != nil; i++)
- if(!strcmp(sdifc[i]->name, cf->type))
- break;
- if(sdifc[i] == nil)
- error("type not found");
-
- if((probe = sdifc[i]->probe) == nil)
- error("No probe function");
- if(p){
- /* Try to find the card on the ISA bus. This code really belongs
- in sdata and I'll move it later. Really! */
- memset(&isa, 0, sizeof(isa));
- isa.port = cf->ports[0].port;
- isa.irq = cf->intnum;
- if(pcmspecial(p, &isa) < 0)
- error("Cannot find controller");
- }
- qlock(&devslock);
- if(waserror()){
- qunlock(&devslock);
- nexterror();
- }
-
- for(i = 0; i != ndevs; i++)
- if((sdev = devs[i].dt_dev) != nil && sdev->idno == *spec)
- break;
- if(i != ndevs)
- error(Eexist);
- if((sdev = (*probe)(cf)) == nil)
- error("Cannot probe controller");
- poperror();
- added_devs = 0;
- tail = sdev;
- while(tail){
- added_devs++;
- tail = tail->next;
- }
-
- _devs = (dev_t*)malloc((ndevs + added_devs) * sizeof(dev_t));
- memmove(_devs, devs, ndevs * sizeof(dev_t));
- free(devs);
- devs = _devs;
- while(sdev){
- /* Assign `spec' to the device */
- *spec = getspec(*spec);
- snprint(name, sizeof(name), "sd%c", *spec);
- kstrdup(&sdev->name, name);
- sdev->idno = *spec;
- sdev->unit = (SDunit **)malloc(sdev->nunit * sizeof(SDunit*));
- sdev->unitflg = (int *)malloc(sdev->nunit * sizeof(int));
- assert(sdev->unit && sdev->unitflg);
- devs[ndevs].dt_dev = sdev;
- devs[ndevs].dt_nunits = sdev->nunit;
- sdev = sdev->next;
- devs[ndevs].dt_dev->next = nil;
- ndevs++;
- }
- qunlock(&devslock);
- return 0;
- }
- static int
- unconfigure(char* spec)
- {
- int i;
- SDev *sdev;
- qlock(&devslock);
- if(waserror()){
- qunlock(&devslock);
- nexterror();
- }
- sdev = nil;
- for(i = 0; i != ndevs; i++)
- if((sdev = devs[i].dt_dev) != nil && sdev->idno == *spec)
- break;
- if(i == ndevs)
- error(Enonexist);
- if(sdev->r.ref)
- error(Einuse);
- /* make sure no interrupts arrive anymore before removing resources */
- if(sdev->enabled && sdev->ifc->disable)
- sdev->ifc->disable(sdev);
- /* we're alone and the device tab is locked; make the device unavailable */
- memmove(&devs[i], &devs[ndevs - 1], sizeof(dev_t));
- memset(&devs[ndevs - 1], 0, sizeof(dev_t));
- ndevs--;
- qunlock(&devslock);
- poperror();
- for(i = 0; i != sdev->nunit; i++)
- if(sdev->unit[i]){
- SDunit *unit = sdev->unit[i];
- free(unit->name);
- free(unit->user);
- free(unit);
- }
- if(sdev->ifc->clear)
- sdev->ifc->clear(sdev);
- return 0;
- }
- static int
- sdconfig(int on, char* spec, DevConf* cf)
- {
- if(on)
- return configure(spec, cf);
- return unconfigure(spec);
- }
- Dev sddevtab = {
- 'S',
- "sd",
- sdreset,
- devinit,
- devshutdown,
- sdattach,
- sdwalk,
- sdstat,
- sdopen,
- devcreate,
- sdclose,
- sdread,
- devbread,
- sdwrite,
- devbwrite,
- devremove,
- sdwstat,
- devpower,
- sdconfig,
- };
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