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- /*
- * intel/amd ahci (advanced host controller interface) sata controller
- * bootstrap driver
- * copyright © 2007, 2008 coraid, inc.
- */
- #include "u.h"
- #include "lib.h"
- #include "mem.h"
- #include "dat.h"
- #include "fns.h"
- #include "io.h"
- #include "error.h"
- #include "sd.h"
- #include "ahci.h"
- #define dprint(...) if(debug == 1) print(__VA_ARGS__); else USED(debug)
- #define idprint(...) if(prid == 1) print(__VA_ARGS__); else USED(prid)
- #define aprint(...) if(datapi == 1) print(__VA_ARGS__); else USED(datapi)
- enum {
- NCtlr = 2,
- NCtlrdrv= 8,
- NDrive = NCtlr*NCtlrdrv,
- Read = 0,
- Write
- };
- /* pci space configurtion */
- enum {
- Pmap = 0x90,
- Ppcs = 0x91,
- Prev = 0xa8,
- };
- enum {
- Tesb,
- Tich,
- Tsb600,
- Tunk,
- };
- #define Intel(x) ((x)->pci->vid == 0x8086)
- static char *tname[] = {
- "63xxesb",
- "ich",
- "sb600",
- "unk",
- };
- enum {
- Dnull,
- Dmissing,
- Dnew,
- Dready,
- Derror,
- Dreset,
- Doffline,
- Dportreset,
- Dlast
- };
- static char *diskstates[Dlast] = {
- "null",
- "missing",
- "new",
- "ready",
- "error",
- "reset",
- "offline",
- "portreset",
- };
- extern SDifc sdiahciifc;
- typedef struct Ctlr Ctlr;
- enum {
- DMautoneg,
- DMsatai,
- DMsataii,
- };
- static char *modename[] = {
- "auto",
- "satai",
- "sataii",
- };
- typedef struct {
- Lock;
- Ctlr *ctlr;
- SDunit *unit;
- char name[10];
- Aport *port;
- Aportm portm;
- Aportc portc; /* redundant ptr to port and portm. */
- uchar mediachange;
- uchar state;
- uchar smartrs;
- uvlong sectors;
- ulong intick;
- int wait;
- uchar mode; /* DMautoneg, satai or sataii. */
- uchar active;
- char serial[20+1];
- char firmware[8+1];
- char model[40+1];
- ushort info[0x200];
- int driveno; /* ctlr*NCtlrdrv + unit */
- int portno; /* ctlr port # != drive # when not all ports enabled. */
- } Drive;
- struct Ctlr {
- Lock;
- int type;
- int enabled;
- SDev *sdev;
- Pcidev *pci;
- uchar *mmio;
- ulong *lmmio;
- Ahba *hba;
- Drive rawdrive[NCtlrdrv];
- Drive* drive[NCtlrdrv];
- int ndrive;
- int mport;
- };
- static Ctlr iactlr[NCtlr];
- static SDev sdevs[NCtlr];
- static int niactlr;
- static int prid = 0;
- static int datapi = 0;
- static char stab[] = {
- [0] 'i', 'm',
- [8] 't', 'c', 'p', 'e',
- [16] 'N', 'I', 'W', 'B', 'D', 'C', 'H', 'S', 'T', 'F', 'X'
- };
- static void
- serrstr(ulong r, char *s, char *e)
- {
- int i;
- e -= 3;
- for(i = 0; i < nelem(stab) && s < e; i++)
- if((r & (1<<i)) && stab[i]){
- *s++ = stab[i];
- if(SerrBad & (1<<i))
- *s++ = '*';
- }
- *s = 0;
- }
- static char ntab[] = "0123456789abcdef";
- static void
- preg(uchar *reg, int n)
- {
- int i;
- char buf[25*3+1], *e;
- e = buf;
- for(i = 0; i < n; i++){
- *e++ = ntab[reg[i] >> 4];
- *e++ = ntab[reg[i] & 0xf];
- *e++ = ' ';
- }
- *e++ = '\n';
- *e = 0;
- dprint(buf);
- }
- static void
- dreg(char *s, Aport *p)
- {
- dprint("%stask=%lux; cmd=%lux; ci=%lux; is=%lux\n",
- s, p->task, p->cmd, p->ci, p->isr);
- }
- static void
- esleep(int ms)
- {
- delay(ms);
- }
- typedef struct {
- Aport *p;
- int i;
- } Asleep;
- static int
- ahciclear(void *v)
- {
- Asleep *s;
- s = v;
- return (s->p->ci & s->i) == 0;
- }
- static void
- aesleep(Aportm *, Asleep *a, int ms)
- {
- ulong start;
- start = m->ticks;
- while((a->p->ci & a->i) != 0)
- if(TK2MS(m->ticks-start) >= ms)
- break;
- }
- static int
- ahciwait(Aportc *c, int ms)
- {
- Aport *p;
- Asleep as;
- p = c->p;
- p->ci = 1;
- as.p = p;
- as.i = 1;
- aesleep(c->m, &as, ms);
- if((p->task & 1) == 0 && p->ci == 0)
- return 0;
- dreg("ahciwait timeout ", c->p);
- return -1;
- }
- static int
- setfeatures(Aportc *pc, uchar f)
- {
- uchar *c;
- Actab *t;
- Alist *l;
- t = pc->m->ctab;
- c = t->cfis;
- memset(c, 0, 0x20);
- c[0] = 0x27;
- c[1] = 0x80;
- c[2] = 0xef;
- c[3] = f;
- c[7] = 0xa0; /* obsolete device bits */
- l = pc->m->list;
- l->flags = Lwrite|0x5;
- l->len = 0;
- l->ctab = PCIWADDR(t);
- l->ctabhi = 0;
- return ahciwait(pc, 3*1000);
- }
- static int
- setudmamode(Aportc *pc, uchar f)
- {
- uchar *c;
- Actab *t;
- Alist *l;
- t = pc->m->ctab;
- c = t->cfis;
- memset(c, 0, 0x20);
- c[0] = 0x27;
- c[1] = 0x80;
- c[2] = 0xef;
- c[3] = 3; /* set transfer mode */
- c[7] = 0xa0; /* obsolete device bits */
- c[12] = 0x40 | f; /* sector count */
- l = pc->m->list;
- l->flags = Lwrite | 0x5;
- l->len = 0;
- l->ctab = PCIWADDR(t);
- l->ctabhi = 0;
- return ahciwait(pc, 3*1000);
- }
- static void
- asleep(int ms)
- {
- delay(ms);
- }
- static int
- ahciportreset(Aportc *c)
- {
- ulong *cmd, i;
- Aport *p;
- p = c->p;
- cmd = &p->cmd;
- *cmd &= ~(Afre|Ast);
- for(i = 0; i < 500; i += 25){
- if((*cmd & Acr) == 0)
- break;
- asleep(25);
- }
- p->sctl = 1 | (p->sctl & ~7);
- delay(1);
- p->sctl &= ~7;
- return 0;
- }
- static ushort
- gbit16(void *a)
- {
- uchar *i;
- i = a;
- return i[1]<<8 | i[0];
- }
- static ulong
- gbit32(void *a)
- {
- ulong j;
- uchar *i;
- i = a;
- j = i[3] << 24;
- j |= i[2] << 16;
- j |= i[1] << 8;
- j |= i[0];
- return j;
- }
- static uvlong
- gbit64(void *a)
- {
- uchar *i;
- i = a;
- return (uvlong) gbit32(i+4)<<32 | gbit32(a);
- }
- static int
- ahciidentify0(Aportc *pc, void *id, int atapi)
- {
- uchar *c;
- Actab *t;
- Alist *l;
- Aprdt *p;
- static uchar tab[] = { 0xec, 0xa1 };
- t = pc->m->ctab;
- c = t->cfis;
- memset(c, 0, 0x20);
- c[0] = 0x27;
- c[1] = 0x80;
- c[2] = tab[atapi];
- c[7] = 0xa0; /* obsolete device bits */
- l = pc->m->list;
- l->flags = 1<<16 | 0x5;
- l->len = 0;
- l->ctab = PCIWADDR(t);
- l->ctabhi = 0;
- memset(id, 0, 0x100);
- p = &t->prdt;
- p->dba = PCIWADDR(id);
- p->dbahi = 0;
- p->count = 1<<31 | (0x200-2) | 1;
- return ahciwait(pc, 3*1000);
- }
- static vlong
- ahciidentify(Aportc *pc, ushort *id)
- {
- int i, sig;
- vlong s;
- Aportm *m;
- m = pc->m;
- m->feat = 0;
- m->smart = 0;
- i = 0;
- sig = pc->p->sig >> 16;
- if(sig == 0xeb14){
- m->feat |= Datapi;
- i = 1;
- }
- if(ahciidentify0(pc, id, i) == -1)
- return -1;
- i = gbit16(id+83) | gbit16(id+86);
- if(i & (1<<10)){
- m->feat |= Dllba;
- s = gbit64(id+100);
- }else
- s = gbit32(id+60);
- if(m->feat & Datapi){
- i = gbit16(id+0);
- if(i & 1)
- m->feat |= Datapi16;
- }
- i = gbit16(id+83);
- if((i>>14) != 1)
- return s;
- if(i & (1<<3))
- m->feat |= Dpower;
- i = gbit16(id+82);
- if(i & 1)
- m->feat |= Dsmart;
- if(i & (1<<14))
- m->feat |= Dnop;
- return s;
- }
- static int
- ahciquiet(Aport *a)
- {
- ulong *p, i;
- p = &a->cmd;
- *p &= ~Ast;
- for(i = 0; i < 500; i += 50){
- if((*p & Acr) == 0)
- goto stop;
- asleep(50);
- }
- return -1;
- stop:
- if((a->task & (ASdrq|ASbsy)) == 0){
- *p |= Ast;
- return 0;
- }
- *p |= Aclo;
- for(i = 0; i < 500; i += 50){
- if((*p & Aclo) == 0)
- goto stop1;
- asleep(50);
- }
- return -1;
- stop1:
- /* extra check */
- dprint("clo clear %lx\n", a->task);
- if(a->task & ASbsy)
- return -1;
- *p |= Ast;
- return 0;
- }
- static int
- ahciidle(Aport *port)
- {
- ulong *p, i, r;
- p = &port->cmd;
- if((*p & Arun) == 0)
- return 0;
- *p &= ~Ast;
- r = 0;
- for(i = 0; i < 500; i += 25){
- if((*p & Acr) == 0)
- goto stop;
- asleep(25);
- }
- r = -1;
- stop:
- if((*p & Afre) == 0)
- return r;
- *p &= ~Afre;
- for(i = 0; i < 500; i += 25){
- if((*p & Afre) == 0)
- return 0;
- asleep(25);
- }
- return -1;
- }
- /*
- * §6.2.2.1 first part; comreset handled by reset disk.
- * - remainder is handled by configdisk.
- * - ahcirecover is a quick recovery from a failed command.
- */
- int
- ahciswreset(Aportc *pc)
- {
- int i;
- i = ahciidle(pc->p);
- pc->p->cmd |= Afre;
- if(i == -1)
- return -1;
- if(pc->p->task & (ASdrq|ASbsy))
- return -1;
- return 0;
- }
- int
- ahcirecover(Aportc *pc)
- {
- ahciswreset(pc);
- pc->p->cmd |= Ast;
- if(setudmamode(pc, 5) == -1)
- return -1;
- return 0;
- }
- static void*
- malign(int size, int align)
- {
- void *v;
- v = xspanalloc(size, align, 0);
- memset(v, 0, size);
- return v;
- }
- static void
- setupfis(Afis *f)
- {
- f->base = malign(0x100, 0x100);
- f->d = f->base + 0;
- f->p = f->base + 0x20;
- f->r = f->base + 0x40;
- f->u = f->base + 0x60;
- f->devicebits = (ulong*)(f->base + 0x58);
- }
- static void
- ahciwakeup(Aport *p)
- {
- ushort s;
- s = p->sstatus;
- if((s & 0x700) != 0x600)
- return;
- if((s & 7) != 1){
- print("ahci: slumbering drive unwakeable %ux\n", s);
- return;
- }
- p->sctl = 3*Aipm | 0*Aspd | Adet;
- delay(1);
- p->sctl &= ~7;
- // iprint("ahci: wake %ux -> %ux\n", s, p->sstatus);
- }
- static int
- ahciconfigdrive(Ahba *h, Aportc *c, int mode)
- {
- Aportm *m;
- Aport *p;
- p = c->p;
- m = c->m;
- if(m->list == 0){
- setupfis(&m->fis);
- m->list = malign(sizeof *m->list, 1024);
- m->ctab = malign(sizeof *m->ctab, 128);
- }
- if(p->sstatus & 3 && h->cap & Hsss){
- dprint("configdrive: spinning up ... [%lux]\n", p->sstatus);
- p->cmd |= Apod|Asud;
- asleep(1400);
- }
- p->serror = SerrAll;
- p->list = PCIWADDR(m->list);
- p->listhi = 0;
- p->fis = PCIWADDR(m->fis.base);
- p->fishi = 0;
- p->cmd |= Afre | Ast;
- if((p->sstatus & 0x707) == 0x601) /* drive coming up in slumbering? */
- ahciwakeup(p);
- /* disable power managment sequence from book. */
- p->sctl = (3*Aipm) | (mode*Aspd) | (0*Adet);
- p->cmd &= ~Aalpe;
- p->ie = IEM;
- return 0;
- }
- static int
- ahcienable(Ahba *h)
- {
- h->ghc |= Hie;
- return 0;
- }
- static int
- ahcidisable(Ahba *h)
- {
- h->ghc &= ~Hie;
- return 0;
- }
- static int
- countbits(ulong u)
- {
- int i, n;
- n = 0;
- for(i = 0; i < 32; i++)
- if(u & (1<<i))
- n++;
- return n;
- }
- static int
- ahciconf(Ctlr *c)
- {
- ulong u;
- Ahba *h;
- static int count;
- h = c->hba = (Ahba*)c->mmio;
- u = h->cap;
- if((u & Hsam) == 0)
- h->ghc |= Hae;
- print("ahci%d port %#p: hba sss %ld; ncs %ld; coal %ld; mports %ld; "
- "led %ld; clo %ld; ems %ld;\n", count++, h,
- (u>>27) & 1, (u>>8) & 0x1f, (u>>7) & 1, u & 0x1f, (u>>25) & 1,
- (u>>24) & 1, (u>>6) & 1);
- return countbits(h->pi);
- }
- static int
- ahcihbareset(Ahba *h)
- {
- int wait;
- h->ghc |= 1;
- for(wait = 0; wait < 1000; wait += 100){
- if(h->ghc == 0)
- return 0;
- delay(100);
- }
- return -1;
- }
- static void
- idmove(char *p, ushort *a, int n)
- {
- int i;
- char *op, *e;
- op = p;
- for(i = 0; i < n/2; i++){
- *p++ = a[i] >> 8;
- *p++ = a[i];
- }
- *p = 0;
- while(p > op && *--p == ' ')
- *p = 0;
- e = p;
- for (p = op; *p == ' '; p++)
- ;
- memmove(op, p, n - (e - p));
- }
- static int
- identify(Drive *d)
- {
- ushort *id;
- vlong osectors, s;
- uchar oserial[21];
- SDunit *u;
- id = d->info;
- s = ahciidentify(&d->portc, id);
- if(s == -1){
- d->state = Derror;
- return -1;
- }
- osectors = d->sectors;
- memmove(oserial, d->serial, sizeof d->serial);
- d->sectors = s;
- d->smartrs = 0;
- idmove(d->serial, id+10, 20);
- idmove(d->firmware, id+23, 8);
- idmove(d->model, id+27, 40);
- u = d->unit;
- memset(u->inquiry, 0, sizeof u->inquiry);
- u->inquiry[2] = 2;
- u->inquiry[3] = 2;
- u->inquiry[4] = sizeof u->inquiry - 4;
- memmove(u->inquiry+8, d->model, 40);
- if(osectors != s || memcmp(oserial, d->serial, sizeof oserial)){
- d->mediachange = 1;
- u->sectors = 0;
- }
- return 0;
- }
- static void
- clearci(Aport *p)
- {
- if((p->cmd & Ast) == 0)
- return;
- p->cmd &= ~Ast;
- p->cmd |= Ast;
- }
- static void
- updatedrive(Drive *d)
- {
- ulong cause, serr, s0, pr, ewake;
- char *name;
- Aport *p;
- static ulong last;
- pr = 1;
- ewake = 0;
- p = d->port;
- cause = p->isr;
- serr = p->serror;
- p->isr = cause;
- name = "??";
- if(d->unit && d->unit->name)
- name = d->unit->name;
- if(p->ci == 0){
- d->portm.flag |= Fdone;
- pr = 0;
- }else if(cause & Adps)
- pr = 0;
- if(cause&Ifatal){
- ewake = 1;
- dprint("Fatal\n");
- }
- if(cause & Adhrs){
- if(p->task & (1<<5|1)){
- dprint("Adhrs cause %lux serr %lux task %lux\n",
- cause, serr, p->task);
- d->portm.flag |= Ferror;
- ewake = 1;
- }
- pr = 0;
- }
- if(pr)
- dprint("%s: upd %lux ta %lux\n", name, cause, p->task);
- if(cause & (Aprcs|Aifs)){
- s0 = d->state;
- switch(p->sstatus & 7){
- case 0:
- d->state = Dmissing;
- break;
- case 1:
- if((p->sstatus & 0x700) == 0x600)
- d->state = Dnew;
- else
- d->state = Derror;
- break;
- case 3:
- /* power mgnt crap for surprise removal */
- p->ie |= Aprcs | Apcs; /* is this required? */
- d->state = Dreset;
- break;
- case 4:
- d->state = Doffline;
- break;
- }
- dprint("%s: %s → %s [Apcrs] %lux\n", name, diskstates[s0],
- diskstates[d->state], p->sstatus);
- if(s0 == Dready && d->state != Dready)
- idprint("%s: pulled\n", name);
- if(d->state != Dready)
- d->portm.flag |= Ferror;
- ewake = 1;
- }
- p->serror = serr;
- if(ewake)
- clearci(p);
- last = cause;
- }
- static void
- pstatus(Drive *d, ulong s)
- {
- /*
- * bogus code because the first interrupt is currently dropped.
- * likely my fault. serror may be cleared at the wrong time.
- */
- switch(s){
- case 0:
- d->state = Dmissing;
- break;
- case 2:
- case 3:
- d->wait = 0;
- d->state = Dnew;
- break;
- case 4:
- d->state = Doffline;
- break;
- case 6:
- d->state = Dnew;
- break;
- }
- }
- static int
- configdrive(Drive *d)
- {
- if(ahciconfigdrive(d->ctlr->hba, &d->portc, d->mode) == -1)
- return -1;
- ilock(d);
- pstatus(d, d->port->sstatus & 7);
- iunlock(d);
- return 0;
- }
- static void
- resetdisk(Drive *d)
- {
- uint state, det, stat;
- Aport *p;
- p = d->port;
- det = p->sctl & 7;
- stat = p->sstatus & 7;
- state = (p->cmd>>28) & 0xf;
- dprint("resetdisk: icc %ux det %d sdet %d\n", state, det, stat);
- if(stat != 3){
- ilock(d);
- d->state = Dportreset;
- iunlock(d);
- return;
- }
- ilock(d);
- state = d->state;
- if(d->state != Dready || d->state != Dnew)
- d->portm.flag |= Ferror;
- clearci(p); /* satisfy sleep condition. */
- iunlock(d);
- qlock(&d->portm);
- if(p->cmd & Ast && ahciswreset(&d->portc) == -1){
- ilock(d);
- d->state = Dportreset; /* get a bigger stick. */
- iunlock(d);
- } else {
- ilock(d);
- d->state = Dmissing;
- iunlock(d);
- configdrive(d);
- }
- dprint("resetdisk: %s → %s\n", diskstates[state], diskstates[d->state]);
- qunlock(&d->portm);
- }
- static int
- newdrive(Drive *d)
- {
- char *name, *s;
- Aportc *c;
- Aportm *m;
- c = &d->portc;
- m = &d->portm;
- name = d->unit->name;
- if(name == 0)
- name = "??";
- if(d->port->task == 0x80)
- return -1;
- qlock(c->m);
- if(setudmamode(c, 5) == -1){
- dprint("%s: can't set udma mode\n", name);
- goto lose;
- }
- if(identify(d) == -1){
- dprint("%s: identify failure\n", name);
- goto lose;
- }
- if(m->feat & Dpower && setfeatures(c, 0x85) == -1){
- m->feat &= ~Dpower;
- if(ahcirecover(c) == -1)
- goto lose;
- }
- if (d->sectors == 0) {
- idprint("%s: no sectors\n", d->unit->name);
- goto lose;
- }
- ilock(d);
- d->state = Dready;
- iunlock(d);
- qunlock(c->m);
- s = "";
- if(m->feat & Dllba)
- s = "L";
- idprint("%s: %sLBA %,llud sectors\n", d->unit->name, s, d->sectors);
- idprint(" %s %s %s %s\n", d->model, d->firmware, d->serial,
- d->mediachange? "[mediachange]": "");
- return 0;
- lose:
- qunlock(&d->portm);
- return -1;
- }
- enum {
- Nms = 256,
- Mphywait = 2*1024/Nms - 1,
- Midwait = 16*1024/Nms - 1,
- Mcomrwait = 64*1024/Nms - 1,
- };
- static void
- westerndigitalhung(Drive *d)
- {
- if((d->portm.feat & Datapi) == 0 && d->active &&
- TK2MS(m->ticks - d->intick) > 5000){
- dprint("%s: drive hung; resetting [%lux] ci=%lx\n",
- d->unit->name, d->port->task, d->port->ci);
- d->state = Dreset;
- }
- }
- static ushort olds[NCtlr*NCtlrdrv];
- static int
- doportreset(Drive *d)
- {
- int i;
- i = -1;
- qlock(&d->portm);
- if(ahciportreset(&d->portc) == -1)
- dprint("ahciportreset fails\n");
- else
- i = 0;
- qunlock(&d->portm);
- dprint("portreset → %s [task %lux]\n", diskstates[d->state],
- d->port->task);
- return i;
- }
- static void
- checkdrive(Drive *d, int i)
- {
- ushort s;
- char *name;
- ilock(d);
- name = d->unit->name;
- s = d->port->sstatus;
- if(s != olds[i]){
- dprint("%s: status: %#ux -> %#ux: %s\n", name, olds[i],
- s, diskstates[d->state]);
- olds[i] = s;
- d->wait = 0;
- }
- westerndigitalhung(d);
- switch(d->state){
- case Dnull:
- break;
- case Dmissing:
- case Dnew:
- switch(s & 0x107){
- case 1:
- ahciwakeup(d->port);
- case 0:
- break;
- default:
- dprint("%s: unknown status %04ux\n", name, s);
- case 0x100:
- if(++d->wait&Mphywait)
- break;
- reset:
- if(++d->mode > DMsataii)
- d->mode = 0;
- if(d->mode == DMsatai){
- d->state = Dportreset;
- goto portreset;
- }
- dprint("%s: reset; new mode %s\n", name,
- modename[d->mode]);
- iunlock(d);
- resetdisk(d);
- ilock(d);
- break;
- case 0x103:
- if((++d->wait&Midwait) == 0){
- dprint("%s: slow reset %#ux task=%#lux; %d\n",
- name, s, d->port->task, d->wait);
- goto reset;
- }
- s = d->port->task&0xff;
- if(s == 0x7f || ((d->port->sig>>16) != 0xeb14 &&
- (s & ~0x17) != (1<<6)))
- break;
- iunlock(d);
- newdrive(d);
- ilock(d);
- break;
- }
- break;
- case Doffline:
- if(d->wait++ & Mcomrwait)
- break;
- case Derror:
- case Dreset:
- dprint("%s: reset [%s]: mode %d; status %#ux\n",
- name, diskstates[d->state], d->mode, s);
- iunlock(d);
- resetdisk(d);
- ilock(d);
- break;
- case Dportreset:
- portreset:
- if(d->wait++ & 0xff && (s & 0x100) == 0)
- break;
- dprint("%s: portreset [%s]: mode %d; status %04ux\n",
- name, diskstates[d->state], d->mode, s);
- d->portm.flag |= Ferror;
- clearci(d->port);
- if((s & 7) == 0){
- d->state = Dmissing;
- break;
- }
- iunlock(d);
- doportreset(d);
- ilock(d);
- break;
- }
- iunlock(d);
- }
- static void
- iainterrupt(Ureg*, void *a)
- {
- int i;
- ulong cause, m;
- Ctlr *c;
- Drive *d;
- c = a;
- ilock(c);
- cause = c->hba->isr;
- for(i = 0; i < c->mport; i++){
- m = 1 << i;
- if((cause & m) == 0)
- continue;
- d = c->rawdrive + i;
- ilock(d);
- if(d->port->isr && c->hba->pi & m)
- updatedrive(d);
- c->hba->isr = m;
- iunlock(d);
- }
- iunlock(c);
- }
- static int
- iaverify(SDunit *u)
- {
- int i;
- Ctlr *c;
- Drive *d;
- c = u->dev->ctlr;
- d = c->drive[u->subno];
- ilock(c);
- ilock(d);
- d->unit = u;
- iunlock(d);
- iunlock(c);
- for(i = 0; i < 10; i++){
- checkdrive(d, d->driveno);
- switch(d->state){
- case Dmissing:
- if(d->port->sstatus & 0x733)
- break;
- /* fall through */
- case Dnull:
- case Dready:
- case Doffline:
- print("sdiahci: drive %d in state %s after %d resets\n",
- d->driveno, diskstates[d->state], i);
- return 1;
- }
- delay(100);
- }
- print("sdiahci: drive %d won't come up; in state %s after %d resets\n",
- d->driveno, diskstates[d->state], i);
- return 1;
- }
- static int
- iaenable(SDev *s)
- {
- Ctlr *c;
- c = s->ctlr;
- ilock(c);
- if(!c->enabled) {
- if(c->ndrive == 0)
- panic("iaenable: zero s->ctlr->ndrive");
- pcisetbme(c->pci);
- setvec(c->pci->intl+VectorPIC, iainterrupt, c);
- /* supposed to squelch leftover interrupts here. */
- ahcienable(c->hba);
- c->enabled = 1;
- }
- iunlock(c);
- return 1;
- }
- static int
- iadisable(SDev *s)
- {
- Ctlr *c;
- c = s->ctlr;
- ilock(c);
- ahcidisable(c->hba);
- // intrdisable(c->irq, iainterrupt, c, c->tbdf, name);
- c->enabled = 0;
- iunlock(c);
- return 1;
- }
- static int
- iaonline(SDunit *unit)
- {
- int r;
- Ctlr *c;
- Drive *d;
- c = unit->dev->ctlr;
- d = c->drive[unit->subno];
- r = 0;
- if(d->portm.feat & Datapi && d->mediachange){
- r = scsionline(unit);
- if(r > 0)
- d->mediachange = 0;
- return r;
- }
- ilock(d);
- if(d->mediachange){
- r = 2;
- d->mediachange = 0;
- /* devsd resets this after online is called; why? */
- unit->sectors = d->sectors;
- unit->secsize = 512;
- } else if(d->state == Dready)
- r = 1;
- iunlock(d);
- return r;
- }
- /* returns locked list! */
- static Alist*
- ahcibuild(Aportm *m, uchar *cmd, void *data, int n, vlong lba)
- {
- uchar *c, acmd, dir, llba;
- Alist *l;
- Actab *t;
- Aprdt *p;
- static uchar tab[2][2] = { 0xc8, 0x25, 0xca, 0x35 };
- dir = *cmd != 0x28;
- llba = m->feat & Dllba? 1: 0;
- acmd = tab[dir][llba];
- qlock(m);
- l = m->list;
- t = m->ctab;
- c = t->cfis;
- c[0] = 0x27;
- c[1] = 0x80;
- c[2] = acmd;
- c[3] = 0;
- c[4] = lba; /* sector lba low 7:0 */
- c[5] = lba >> 8; /* cylinder low lba mid 15:8 */
- c[6] = lba >> 16; /* cylinder hi lba hi 23:16 */
- c[7] = 0xa0 | 0x40; /* obsolete device bits + lba */
- if(llba == 0)
- c[7] |= (lba>>24) & 7;
- c[8] = lba >> 24; /* sector (exp) lba 31:24 */
- c[9] = lba >> 32; /* cylinder low (exp) lba 39:32 */
- c[10] = lba >> 48; /* cylinder hi (exp) lba 48:40 */
- c[11] = 0; /* features (exp); */
- c[12] = n; /* sector count */
- c[13] = n >> 8; /* sector count (exp) */
- c[14] = 0; /* r */
- c[15] = 0; /* control */
- *(ulong*)(c+16) = 0;
- l->flags = 1<<16 | Lpref | 0x5; /* Lpref ?? */
- if(dir == Write)
- l->flags |= Lwrite;
- l->len = 0;
- l->ctab = PCIWADDR(t);
- l->ctabhi = 0;
- p = &t->prdt;
- p->dba = PCIWADDR(data);
- p->dbahi = 0;
- p->count = 1<<31 | (512*n - 2) | 1;
- return l;
- }
- static Alist*
- ahcibuildpkt(Aportm *m, SDreq *r, void *data, int n)
- {
- int fill, len;
- uchar *c;
- Actab *t;
- Alist *l;
- Aprdt *p;
- qlock(m);
- l = m->list;
- t = m->ctab;
- c = t->cfis;
- fill = m->feat & Datapi16? 16: 12;
- if((len = r->clen) > fill)
- len = fill;
- memmove(t->atapi, r->cmd, len);
- memset(t->atapi + len, 0, fill - len);
- c[0] = 0x27;
- c[1] = 0x80;
- c[2] = 0xa0;
- if(n != 0)
- c[3] = 1; /* dma */
- else
- c[3] = 0; /* features (exp); */
- c[4] = 0; /* sector lba low 7:0 */
- c[5] = n; /* cylinder low lba mid 15:8 */
- c[6] = n >> 8; /* cylinder hi lba hi 23:16 */
- c[7] = 0xa0; /* obsolete device bits */
- *(ulong*)(c+8) = 0;
- *(ulong*)(c+12) = 0;
- *(ulong*)(c+16) = 0;
- l->flags = 1<<16 | Lpref | Latapi | 0x5;
- if(r->write != 0 && data)
- l->flags |= Lwrite;
- l->len = 0;
- l->ctab = PCIWADDR(t);
- l->ctabhi = 0;
- if(data == 0)
- return l;
- p = &t->prdt;
- p->dba = PCIWADDR(data);
- p->dbahi = 0;
- p->count = 1<<31 | (n - 2) | 1;
- return l;
- }
- static int
- waitready(Drive *d)
- {
- ulong s, t, i;
- for(i = 0; i < 120; i++){
- ilock(d);
- s = d->port->sstatus;
- t = d->port->task;
- iunlock(d);
- if((s & 0x100) == 0)
- return -1;
- if(d->state == Dready && (s & 7) == 3)
- return 0;
- if((i + 1) % 30 == 0)
- print("%s: waitready: [%s] task=%lux sstat=%lux\n",
- d->unit->name, diskstates[d->state], t, s);
- esleep(1000);
- }
- print("%s: not responding; offline\n", d->unit->name);
- ilock(d);
- d->state = Doffline;
- iunlock(d);
- return -1;
- }
- static int
- iariopkt(SDreq *r, Drive *d)
- {
- int n, count, try, max, flag, task;
- char *name;
- uchar *cmd, *data;
- Aport *p;
- Asleep as;
- cmd = r->cmd;
- name = d->unit->name;
- p = d->port;
- aprint("%02ux %02ux %c %d %p\n", cmd[0], cmd[2], "rw"[r->write],
- r->dlen, r->data);
- // if(cmd[0] == 0x5a && (cmd[2] & 0x3f) == 0x3f)
- // return sdmodesense(r, cmd, d->info, sizeof d->info);
- r->rlen = 0;
- count = r->dlen;
- max = 65536;
- try = 0;
- retry:
- if(waitready(d) == -1)
- return SDeio;
- data = r->data;
- n = count;
- if(n > max)
- n = max;
- d->active++;
- ahcibuildpkt(&d->portm, r, data, n);
- ilock(d);
- d->portm.flag = 0;
- iunlock(d);
- p->ci = 1;
- as.p = p;
- as.i = 1;
- d->intick = m->ticks;
- while(ahciclear(&as) == 0)
- ;
- if (d->port == nil)
- panic("iariopkt: nil d->port");
- ilock(d);
- flag = d->portm.flag;
- task = d->port->task;
- iunlock(d);
- if(task & (Efatal<<8) || task & (ASbsy|ASdrq) && d->state == Dready){
- d->port->ci = 0;
- ahcirecover(&d->portc);
- task = d->port->task;
- }
- d->active--;
- qunlock(&d->portm);
- if(flag == 0){
- if(++try == 10){
- print("%s: bad disk\n", name);
- r->status = SDcheck;
- return SDcheck;
- }
- print("%s: retry\n", name);
- esleep(1000);
- goto retry;
- }
- if(flag & Ferror){
- if((task & Eidnf) == 0)
- print("%s: i/o error %ux\n", name, task);
- r->status = SDcheck;
- return SDcheck;
- }
- data += n;
- r->rlen = data - (uchar*)r->data;
- r->status = SDok;
- return SDok;
- }
- static int
- iario(SDreq *r)
- {
- int n, count, max, flag, task;
- vlong lba;
- char *name;
- uchar *cmd, *data;
- Aport *p;
- Asleep as;
- Ctlr *c;
- Drive *d;
- SDunit *unit;
- unit = r->unit;
- c = unit->dev->ctlr;
- d = c->drive[unit->subno];
- if(d->portm.feat & Datapi)
- return iariopkt(r, d);
- cmd = r->cmd;
- name = d->unit->name;
- p = d->port;
- // if((i = sdfakescsi(r, d->info, sizeof d->info)) != SDnostatus){
- // r->status = i;
- // return i;
- // }
- if(*cmd != 0x28 && *cmd != 0x2a){
- print("%s: bad cmd 0x%.2ux\n", name, cmd[0]);
- r->status = SDcheck;
- return SDcheck;
- }
- lba = cmd[2]<<24 | cmd[3]<<16 | cmd[4]<<8 | cmd[5];
- count = cmd[7]<<8 | cmd[8];
- if(r->data == nil)
- return SDok;
- if (unit->secsize <= 0)
- unit->secsize = 512;
- if(r->dlen < count * unit->secsize)
- count = r->dlen / unit->secsize;
- max = 128;
- if(waitready(d) == -1)
- return SDeio;
- data = r->data;
- while(count > 0){
- n = count;
- if(n > max)
- n = max;
- d->active++;
- ahcibuild(&d->portm, cmd, data, n, lba);
- ilock(d);
- d->portm.flag = 0;
- iunlock(d);
- p->ci = 1;
- as.p = p;
- as.i = 1;
- d->intick = m->ticks;
- while(ahciclear(&as) == 0)
- ;
- if (d->port == nil)
- panic("iario: nil d->port");
- ilock(d);
- flag = d->portm.flag;
- task = d->port->task;
- iunlock(d);
- if(task & (Efatal<<8) ||
- task & (ASbsy|ASdrq) && d->state == Dready){
- d->port->ci = 0;
- ahcirecover(&d->portc);
- task = d->port->task;
- }
- d->active--;
- qunlock(&d->portm);
- if(flag == 0 || flag & Ferror){
- print("%s: i/o error %ux @%lld\n", name, task, lba);
- r->status = SDeio;
- return SDeio;
- }
- count -= n;
- lba += n;
- data += n * unit->secsize;
- }
- r->rlen = data - (uchar*)r->data;
- r->status = SDok;
- return SDok;
- }
- /*
- * configure drives 0-5 as ahci sata (c.f. errata)
- */
- static int
- iaahcimode(Pcidev *p)
- {
- dprint("iaahcimode %ux %ux %ux\n", pcicfgr8(p, 0x91),
- pcicfgr8(p, 92), pcicfgr8(p, 93));
- pcicfgw16(p, 0x92, pcicfgr32(p, 0x92) | 0xf); /* ports 0-3 */
- // pcicfgw8(p, 0x93, pcicfgr32(p, 9x93) | 3); /* ports 4-5 */
- return 0;
- }
- static void
- iasetupahci(Ctlr *c)
- {
- /* disable cmd block decoding. */
- pcicfgw16(c->pci, 0x40, pcicfgr16(c->pci, 0x40) & ~(1<<15));
- pcicfgw16(c->pci, 0x42, pcicfgr16(c->pci, 0x42) & ~(1<<15));
- c->lmmio[0x4/4] |= 1 << 31; /* enable ahci mode (ghc register) */
- c->lmmio[0xc/4] = (1<<6) - 1; /* five ports (supposedly ro pi reg) */
- /* enable ahci mode; from ich9 datasheet */
- pcicfgw8(c->pci, 0x90, 1<<6 | 1<<5);
- }
- static int
- didtype(Pcidev *p)
- {
- switch(p->vid){
- case 0x8086:
- if((p->did & 0xfffc) == 0x2680)
- return Tesb;
- /*
- * 0x27c4 is the intel 82801 in compatibility (not sata) mode.
- * ich7 is 82801g[bh]m?.
- */
- if ((p->did & 0xfeff) == 0x2829 || /* ich8 */
- (p->did & 0xfffe) == 0x2922 || /* ich9 */
- (p->did & 0xfffe) == 0x27c4 /* || p->did == 0x27c0 */ ) /* ich7 */
- return Tich;
- break;
- case 0x1002:
- if(p->did == 0x4380)
- return Tsb600;
- break;
- }
- if(p->ccrb == Pcibcstore && p->ccru == 6 && p->ccrp == 1)
- return Tunk;
- return -1;
- }
- static SDev*
- iapnp(void)
- {
- int i, n, nunit, type;
- ulong io;
- Ctlr *c;
- Drive *d;
- Pcidev *p;
- SDev *head, *tail, *s;
- static int done;
- if (done || getconf("*noahciload") != nil)
- return nil;
- done = 1;
- memset(olds, 0xff, sizeof olds);
- p = nil;
- head = tail = nil;
- loop:
- while((p = pcimatch(p, 0, 0)) != nil){
- if((type = didtype(p)) == -1)
- continue;
- if(niactlr == NCtlr){
- print("iapnp: %s: too many controllers\n", tname[type]);
- break;
- }
- c = iactlr + niactlr;
- s = sdevs + niactlr;
- memset(c, 0, sizeof *c);
- memset(s, 0, sizeof *s);
- c->pci = p;
- c->type = type;
- io = p->mem[Abar].bar & ~0xf;
- io = upamalloc(io, p->mem[Abar].size, 0);
- if(io == 0){
- print("%s: address %#lux in use, did %#ux\n",
- tname[c->type], io, p->did);
- continue;
- }
- /* ugly hack: get this in compatibility mode; see memory.c:271 */
- if(p->mem[Abar].bar == 0) {
- print("%s: did %#ux has zero bar\n", tname[c->type],
- p->did);
- continue;
- }
- if(io == 0x40000000) {
- print("%s: did %#ux is in non-sata mode. bar %#lux\n",
- tname[c->type], p->did, p->mem[Abar].bar);
- continue;
- }
- c->mmio = KADDR(io);
- c->lmmio = (ulong*)c->mmio;
- if(Intel(c) && p->did != 0x2681)
- iasetupahci(c);
- nunit = ahciconf(c);
- // ahcihbareset((Ahba*)c->mmio);
- if(Intel(c) && iaahcimode(p) == -1)
- break;
- if(nunit < 1){
- // vunmap(c->mmio, p->mem[Abar].size);
- continue;
- }
- niactlr++;
- i = (c->hba->cap>>21) & 1;
- print("%s: sata-%s with %d ports\n", tname[c->type],
- "I\0II"+i*2, nunit);
- s->ifc = &sdiahciifc;
- s->ctlr = c;
- s->nunit = nunit;
- s->idno = 'E';
- c->sdev = s;
- c->ndrive = nunit;
- c->mport = c->hba->cap & 0x1f;
- /* map the drives -- they don't all need to be enabled. */
- memset(c->rawdrive, 0, sizeof c->rawdrive);
- n = 0;
- for(i = 0; i < NCtlrdrv; i++) {
- d = c->rawdrive+i;
- d->portno = i;
- d->driveno = -1;
- d->sectors = 0;
- d->ctlr = c;
- if((c->hba->pi & (1<<i)) == 0)
- continue;
- d->port = (Aport*)(c->mmio + 0x80*i + 0x100);
- d->portc.p = d->port;
- d->portc.m = &d->portm;
- d->driveno = n++;
- c->drive[d->driveno] = d;
- }
- for(i = 0; i < n; i++)
- if(ahciidle(c->drive[i]->port) == -1){
- print("%s: port %d wedged; abort\n",
- tname[c->type], i);
- goto loop;
- }
- for(i = 0; i < n; i++){
- c->drive[i]->mode = DMsatai;
- configdrive(c->drive[i]);
- }
- if(head)
- tail->next = s;
- else
- head = s;
- tail = s;
- }
- return head;
- }
- static SDev*
- iaid(SDev* sdev)
- {
- int i;
- Ctlr *c;
- for(; sdev; sdev = sdev->next){
- if(sdev->ifc != &sdiahciifc)
- continue;
- c = sdev->ctlr;
- for(i = 0; i < NCtlr; i++)
- if(c == iactlr + i)
- sdev->idno = 'E' + i;
- }
- return nil;
- }
- SDifc sdiahciifc = {
- "iahci",
- iapnp,
- nil, /* legacy */
- iaid,
- iaenable,
- iadisable,
- iaverify,
- iaonline,
- iario,
- nil,
- nil,
- scsibio,
- };
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