ref: 3b7e03a30ed29ee0666c00568bf67b8179c28d12
dir: /sys/src/9/pc/sdmylex.c/
/*
* Mylex MultiMaster (Buslogic BT-*) SCSI Host Adapter
* in both 24-bit and 32-bit mode.
* 24-bit mode works for Adaptec AHA-154xx series too.
*
* To do:
* allocate more Ccb's as needed, up to NMbox-1;
* add nmbox and nccb to Ctlr struct for the above;
* 64-bit LUN/explicit wide support necessary?
*
*/
#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"
#define K2BPA(va, tbdf) PADDR(va)
#define BPA2K(pa, tbdf) KADDR(pa)
extern SDifc sdmylexifc;
enum { /* registers */
Rcontrol = 0x00, /* WO: control register */
Rstatus = 0x00, /* RO: status register */
Rcpr = 0x01, /* WO: command/parameter register */
Rdatain = 0x01, /* RO: data-in register */
Rinterrupt = 0x02, /* RO: interrupt register */
};
enum { /* Rcontrol */
Rsbus = 0x10, /* SCSI Bus Reset */
Rint = 0x20, /* Interrupt Reset */
Rsoft = 0x40, /* Soft Reset */
Rhard = 0x80, /* Hard Reset */
};
enum { /* Rstatus */
Cmdinv = 0x01, /* Command Invalid */
Dirrdy = 0x04, /* Data In Register Ready */
Cprbsy = 0x08, /* Command/Parameter Register Busy */
Hardy = 0x10, /* Host Adapter Ready */
Inreq = 0x20, /* Initialisation Required */
Dfail = 0x40, /* Diagnostic Failure */
Dact = 0x80, /* Diagnostic Active */
};
enum { /* Rcpr */
Cinitialise = 0x01, /* Initialise Mailbox */
Cstart = 0x02, /* Start Mailbox Command */
Cinquiry = 0x04, /* Adapter Inquiry */
Ceombri = 0x05, /* Enable OMBR Interrupt */
Cinquire = 0x0B, /* Inquire Configuration */
Cextbios = 0x28, /* AHA-1542: extended BIOS info. */
Cmbienable = 0x29, /* AHA-1542: Mailbox interface enable */
Ciem = 0x81, /* Initialise Extended Mailbox */
Ciesi = 0x8D, /* Inquire Extended Setup Information */
Cerrm = 0x8F, /* Enable strict round-robin mode */
Cwide = 0x96, /* Wide CCB */
};
enum { /* Rinterrupt */
Imbl = 0x01, /* Incoming Mailbox Loaded */
Mbor = 0x02, /* Mailbox Out Ready */
Cmdc = 0x04, /* Command Complete */
Rsts = 0x08, /* SCSI Reset State */
Intv = 0x80, /* Interrupt Valid */
};
typedef struct Mbox24 Mbox24;
struct Mbox24 {
uchar code; /* action/completion code */
uchar ccb[3]; /* CCB pointer (MSB, ..., LSB) */
};
typedef struct Mbox32 Mbox32;
struct Mbox32 {
uchar ccb[4]; /* CCB pointer (LSB, ..., MSB) */
uchar btstat; /* BT-7[45]7[SD] status */
uchar sdstat; /* SCSI device status */
uchar pad;
uchar code; /* action/completion code */
};
enum { /* mailbox commands */
Mbfree = 0x00, /* Mailbox not in use */
Mbostart = 0x01, /* Start a mailbox command */
Mboabort = 0x02, /* Abort a mailbox command */
Mbiok = 0x01, /* CCB completed without error */
Mbiabort = 0x02, /* CCB aborted at request of host */
Mbinx = 0x03, /* Aborted CCB not found */
Mbierror = 0x04, /* CCB completed with error */
};
typedef struct Ccb24 Ccb24;
typedef struct Ccb32 Ccb32;
typedef union Ccb Ccb;
typedef struct Ccb24 {
uchar opcode; /* Operation code */
uchar datadir; /* Data direction control */
uchar cdblen; /* Length of CDB */
uchar senselen; /* Length of sense area */
uchar datalen[3]; /* Data length (MSB, ..., LSB) */
uchar dataptr[3]; /* Data pointer (MSB, ..., LSB) */
uchar linkptr[3]; /* Link pointer (MSB, ..., LSB) */
uchar linkid; /* command linking identifier */
uchar btstat; /* BT-* adapter status */
uchar sdstat; /* SCSI device status */
uchar reserved[2]; /* */
uchar cs[12+0xFF]; /* Command descriptor block + Sense */
void* data; /* buffer if address > 24-bits */
Rendez;
int done; /* command completed */
Ccb* ccb; /* link on free list */
} Ccb24;
typedef struct Ccb32 {
uchar opcode; /* Operation code */
uchar datadir; /* Data direction control */
uchar cdblen; /* Length of CDB */
uchar senselen; /* Length of sense area */
uchar datalen[4]; /* Data length (LSB, ..., MSB) */
uchar dataptr[4]; /* Data pointer (LSB, ..., MSB) */
uchar reserved[2];
uchar btstat; /* BT-* adapter status */
uchar sdstat; /* SCSI device status */
uchar targetid; /* Target ID */
uchar luntag; /* LUN & tag */
uchar cdb[12]; /* Command descriptor block */
uchar ccbctl; /* CCB control */
uchar linkid; /* command linking identifier */
uchar linkptr[4]; /* Link pointer (LSB, ..., MSB) */
uchar senseptr[4]; /* Sense pointer (LSB, ..., MSB) */
uchar sense[0xFF]; /* Sense bytes */
Rendez;
int done; /* command completed */
Ccb* ccb; /* link on free list */
} Ccb32;
typedef union Ccb {
Ccb24;
Ccb32;
} Ccb;
enum { /* opcode */
OInitiator = 0x00, /* initiator CCB */
Ordl = 0x03, /* initiator CCB with
* residual data length returned
*/
};
enum { /* datadir */
CCBdatain = 0x08, /* inbound, length is checked */
CCBdataout = 0x10, /* outbound, length is checked */
};
enum { /* btstat */
Eok = 0x00, /* normal completion with no errors */
};
enum { /* luntag */
TagEnable = 0x20, /* Tag enable */
SQTag = 0x00, /* Simple Queue Tag */
HQTag = 0x40, /* Head of Queue Tag */
OQTag = 0x80, /* Ordered Queue Tag */
};
enum { /* CCB control */
NoDisc = 0x08, /* No disconnect */
NoUnd = 0x10, /* No underrrun error report */
NoData = 0x20, /* No data transfer */
NoStat = 0x40, /* No CCB status if zero */
NoIntr = 0x80, /* No Interrupts */
};
typedef struct Ctlr Ctlr;
struct Ctlr {
int port; /* I/O port */
int id; /* adapter SCSI id */
int bus; /* 24 or 32 -bit */
int irq;
int wide;
Pcidev* pcidev;
SDev* sdev;
int spurious;
Lock issuelock;
Lock ccblock;
QLock ccbq;
Rendez ccbr;
Lock mboxlock;
void* mb; /* mailbox out + mailbox in */
int mbox; /* current mailbox out index into mb */
int mbix; /* current mailbox in index into mb */
Lock cachelock;
Ccb* ccb; /* list of free Ccb's */
Ccb** cache; /* last completed Ccb */
};
/*
* The number of mailboxes should be a multiple of 8 (4 for Mbox32)
* to ensure the boundary between the out and in mailboxes doesn't
* straddle a cache-line boundary.
* The number of Ccb's should be less than the number of mailboxes to
* ensure no queueing is necessary on mailbox allocation.
*/
enum {
NMbox = 8*8, /* number of Mbox's */
NCcb = NMbox-1, /* number of Ccb's */
};
#define PADDR24(a, n) ((PADDR(a)+(n)) <= (1<<24))
static void
ccbfree(Ctlr* ctlr, Ccb* ccb)
{
lock(&ctlr->ccblock);
if(ctlr->bus == 24)
((Ccb24*)ccb)->ccb = ctlr->ccb;
else
((Ccb32*)ccb)->ccb = ctlr->ccb;
if(ctlr->ccb == nil)
wakeup(&ctlr->ccbr);
ctlr->ccb = ccb;
unlock(&ctlr->ccblock);
}
static int
ccbavailable(void* a)
{
return ((Ctlr*)a)->ccb != nil;
}
static Ccb*
ccballoc(Ctlr* ctlr)
{
Ccb *ccb;
for(;;){
lock(&ctlr->ccblock);
if((ccb = ctlr->ccb) != nil){
if(ctlr->bus == 24)
ctlr->ccb = ((Ccb24*)ccb)->ccb;
else
ctlr->ccb = ((Ccb32*)ccb)->ccb;
unlock(&ctlr->ccblock);
break;
}
unlock(&ctlr->ccblock);
qlock(&ctlr->ccbq);
if(waserror()){
qunlock(&ctlr->ccbq);
continue;
}
sleep(&ctlr->ccbr, ccbavailable, ctlr);
qunlock(&ctlr->ccbq);
poperror();
}
return ccb;
}
static int
done24(void* arg)
{
return ((Ccb24*)arg)->done;
}
static int
mylex24rio(SDreq* r)
{
ulong p;
Ctlr *ctlr;
Ccb24 *ccb;
Mbox24 *mb;
uchar *data, lun, *sense;
int d, n, btstat, sdstat, target;
ctlr = r->unit->dev->ctlr;
target = r->unit->subno;
lun = (r->cmd[1]>>5) & 0x07;
/*
* Ctlr->cache holds the last completed Ccb for this target if it
* returned 'check condition'.
* If this command is a request-sense and there is valid sense data
* from the last completed Ccb, return it immediately.
*/
lock(&ctlr->cachelock);
if((ccb = ctlr->cache[target]) != nil){
ctlr->cache[target] = nil;
if(r->cmd[0] == 0x03
&& ccb->sdstat == SDcheck && lun == ((ccb->cs[1]>>5) & 0x07)){
unlock(&ctlr->cachelock);
if(r->dlen){
sense = &ccb->cs[ccb->cdblen];
n = 8+sense[7];
if(n > r->dlen)
n = r->dlen;
memmove(r->data, sense, n);
r->rlen = n;
}
ccbfree(ctlr, (Ccb*)ccb);
return SDok;
}
}
unlock(&ctlr->cachelock);
if(ccb == nil)
ccb = ccballoc(ctlr);
/*
* Check if the transfer is to memory above the 24-bit limit the
* controller can address. If it is, try to allocate a temporary
* buffer as a staging area.
*/
n = r->dlen;
if(n && !PADDR24(r->data, n)){
data = mallocz(n, 0);
if(data == nil || !PADDR24(data, n)){
if(data != nil){
free(data);
ccb->data = nil;
}
ccbfree(ctlr, (Ccb*)ccb);
return SDmalloc;
}
if(r->write)
memmove(data, r->data, n);
ccb->data = r->data;
}
else
data = r->data;
/*
* Fill in the ccb.
*/
ccb->opcode = Ordl;
ccb->datadir = (target<<5)|lun;
if(n == 0)
ccb->datadir |= CCBdataout|CCBdatain;
else if(!r->write)
ccb->datadir |= CCBdatain;
else
ccb->datadir |= CCBdataout;
ccb->cdblen = r->clen;
ccb->senselen = 0xFF;
ccb->datalen[0] = n>>16;
ccb->datalen[1] = n>>8;
ccb->datalen[2] = n;
if(data == nil)
p = 0;
else
p = PADDR(data);
ccb->dataptr[0] = p>>16;
ccb->dataptr[1] = p>>8;
ccb->dataptr[2] = p;
ccb->linkptr[0] = ccb->linkptr[1] = ccb->linkptr[2] = 0;
ccb->linkid = 0;
ccb->btstat = ccb->sdstat = 0;
ccb->reserved[0] = ccb->reserved[1] = 0;
memmove(ccb->cs, r->cmd, r->clen);
/*
* There's one more mbox than there there is
* ccb so there is always one free.
*/
lock(&ctlr->mboxlock);
mb = ctlr->mb;
mb += ctlr->mbox;
p = PADDR(ccb);
mb->ccb[0] = p>>16;
mb->ccb[1] = p>>8;
mb->ccb[2] = p;
mb->code = Mbostart;
ctlr->mbox++;
if(ctlr->mbox >= NMbox)
ctlr->mbox = 0;
/*
* This command does not require Hardy
* and doesn't generate a Cmdc interrupt.
*/
ccb->done = 0;
outb(ctlr->port+Rcpr, Cstart);
unlock(&ctlr->mboxlock);
/*
* Wait for the request to complete and return the status.
* Since the buffer is not reference counted cannot return
* until the DMA is done writing into the buffer so the caller
* cannot free the buffer prematurely.
*/
while(waserror())
;
sleep(ccb, done24, ccb);
poperror();
/*
* Save the status and patch up the number of
* bytes actually transferred.
* There's a firmware bug on some 956C controllers
* which causes the return count from a successful
* READ CAPACITY not be updated, so fix it here.
*/
sdstat = ccb->sdstat;
btstat = ccb->btstat;
d = ccb->datalen[0]<<16;
d |= ccb->datalen[1]<<8;
d |= ccb->datalen[2];
if(ccb->cs[0] == 0x25 && sdstat == SDok)
d = 0;
n -= d;
r->rlen = n;
/*
* Tidy things up if a staging area was used for the data,
*/
if(ccb->data != nil){
if(sdstat == SDok && btstat == 0 && !r->write)
memmove(ccb->data, data, n);
free(data);
ccb->data = nil;
}
/*
* If there was a check-condition, save the
* ccb for a possible request-sense command.
*/
if(sdstat == SDcheck){
if(r->flags & SDnosense){
lock(&ctlr->cachelock);
if(ctlr->cache[target])
ccbfree(ctlr, ctlr->cache[target]);
ctlr->cache[target] = (Ccb*)ccb;
unlock(&ctlr->cachelock);
return SDcheck;
}
sense = &ccb->cs[ccb->cdblen];
n = 8+sense[7];
if(n > sizeof(r->sense)-1)
n = sizeof(r->sense)-1;
memmove(r->sense, sense, n);
r->flags |= SDvalidsense;
}
ccbfree(ctlr, (Ccb*)ccb);
if(btstat){
if(btstat == 0x11)
return SDtimeout;
return SDeio;
}
return sdstat;
}
static void
mylex24interrupt(Ureg*, void* arg)
{
ulong pa;
Ctlr *ctlr;
Ccb24 *ccb;
Mbox24 *mb, *mbox;
int port, rinterrupt, rstatus;
ctlr = arg;
port = ctlr->port;
/*
* Save and clear the interrupt(s). The only
* interrupts expected are Cmdc, which is ignored,
* and Imbl which means something completed.
* There's one spurious interrupt left over from
* initialisation, ignore it.
*/
rinterrupt = inb(port+Rinterrupt);
rstatus = inb(port+Rstatus);
outb(port+Rcontrol, Rint);
if((rinterrupt & ~(Cmdc|Imbl)) != Intv && ctlr->spurious++)
print("%s: interrupt 0x%2.2ux\n",
ctlr->sdev->name, rinterrupt);
if((rinterrupt & Cmdc) && (rstatus & Cmdinv))
print("%s: command invalid\n", ctlr->sdev->name);
/*
* Look for something in the mail.
* If there is, save the status, free the mailbox
* and wakeup whoever.
*/
mb = ctlr->mb;
for(mbox = &mb[ctlr->mbix]; mbox->code; mbox = &mb[ctlr->mbix]){
pa = (mbox->ccb[0]<<16)|(mbox->ccb[1]<<8)|mbox->ccb[2];
ccb = BPA2K(pa, BUSUNKNOWN);
mbox->code = 0;
ccb->done = 1;
wakeup(ccb);
ctlr->mbix++;
if(ctlr->mbix >= NMbox+NMbox)
ctlr->mbix = NMbox;
}
}
static int
done32(void* arg)
{
return ((Ccb32*)arg)->done;
}
static int
mylex32rio(SDreq* r)
{
ulong p;
uchar lun;
Ctlr *ctlr;
Ccb32 *ccb;
Mbox32 *mb;
int d, n, btstat, sdstat, target;
ctlr = r->unit->dev->ctlr;
target = r->unit->subno;
lun = (r->cmd[1]>>5) & 0x07;
/*
* Ctlr->cache holds the last completed Ccb for this target if it
* returned 'check condition'.
* If this command is a request-sense and there is valid sense data
* from the last completed Ccb, return it immediately.
*/
lock(&ctlr->cachelock);
if((ccb = ctlr->cache[target]) != nil){
ctlr->cache[target] = nil;
if(r->cmd[0] == 0x03
&& ccb->sdstat == SDcheck && lun == (ccb->luntag & 0x07)){
unlock(&ctlr->cachelock);
if(r->dlen){
n = 8+ccb->sense[7];
if(n > r->dlen)
n = r->dlen;
memmove(r->data, ccb->sense, n);
r->rlen = n;
}
ccbfree(ctlr, (Ccb*)ccb);
return SDok;
}
}
unlock(&ctlr->cachelock);
if(ccb == nil)
ccb = ccballoc(ctlr);
/*
* Fill in the ccb.
*/
ccb->opcode = Ordl;
n = r->dlen;
if(n == 0)
ccb->datadir = CCBdataout|CCBdatain;
else if(!r->write)
ccb->datadir = CCBdatain;
else
ccb->datadir = CCBdataout;
ccb->cdblen = r->clen;
ccb->datalen[0] = n;
ccb->datalen[1] = n>>8;
ccb->datalen[2] = n>>16;
ccb->datalen[3] = n>>24;
if(r->data == nil)
p = 0;
else
p = PADDR(r->data);
ccb->dataptr[0] = p;
ccb->dataptr[1] = p>>8;
ccb->dataptr[2] = p>>16;
ccb->dataptr[3] = p>>24;
ccb->targetid = target;
ccb->luntag = lun;
if(r->unit->inquiry[7] & 0x02)
if(ctlr->wide)
ccb->datadir |= SQTag|TagEnable;
else
ccb->luntag |= SQTag|TagEnable;
memmove(ccb->cdb, r->cmd, r->clen);
ccb->btstat = ccb->sdstat = 0;
ccb->ccbctl = 0;
/*
* There's one more mbox than there there is
* ccb so there is always one free.
*/
lock(&ctlr->mboxlock);
mb = ctlr->mb;
mb += ctlr->mbox;
p = PADDR(ccb);
mb->ccb[0] = p;
mb->ccb[1] = p>>8;
mb->ccb[2] = p>>16;
mb->ccb[3] = p>>24;
mb->code = Mbostart;
ctlr->mbox++;
if(ctlr->mbox >= NMbox)
ctlr->mbox = 0;
/*
* This command does not require Hardy
* and doesn't generate a Cmdc interrupt.
*/
ccb->done = 0;
outb(ctlr->port+Rcpr, Cstart);
unlock(&ctlr->mboxlock);
/*
* Wait for the request to complete and return the status.
* Since the buffer is not reference counted cannot return
* until the DMA is done writing into the buffer so the caller
* cannot free the buffer prematurely.
*/
while(waserror())
;
sleep(ccb, done32, ccb);
poperror();
/*
* Save the status and patch up the number of
* bytes actually transferred.
* There's a firmware bug on some 956C controllers
* which causes the return count from a successful
* READ CAPACITY not to be updated, so fix it here.
*/
sdstat = ccb->sdstat;
btstat = ccb->btstat;
d = ccb->datalen[0];
d |= (ccb->datalen[1]<<8);
d |= (ccb->datalen[2]<<16);
d |= (ccb->datalen[3]<<24);
if(ccb->cdb[0] == 0x25 && sdstat == SDok)
d = 0;
n -= d;
r->rlen = n;
/*
* If there was a check-condition, save the
* ccb for a possible request-sense command.
*/
if(sdstat == SDcheck){
if(r->flags & SDnosense){
lock(&ctlr->cachelock);
if(ctlr->cache[target])
ccbfree(ctlr, ctlr->cache[target]);
ctlr->cache[target] = (Ccb*)ccb;
unlock(&ctlr->cachelock);
return SDcheck;
}
n = 8+ccb->sense[7];
if(n > sizeof(r->sense)-1)
n = sizeof(r->sense)-1;
memmove(r->sense, ccb->sense, n);
r->flags |= SDvalidsense;
}
ccbfree(ctlr, (Ccb*)ccb);
if(btstat){
if(btstat == 0x11)
return SDtimeout;
return SDeio;
}
return sdstat;
}
static void
mylex32interrupt(Ureg*, void* arg)
{
ulong pa;
Ctlr *ctlr;
Ccb32 *ccb;
Mbox32 *mb, *mbox;
int port, rinterrupt, rstatus;
ctlr = arg;
port = ctlr->port;
/*
* Save and clear the interrupt(s). The only
* interrupts expected are Cmdc, which is ignored,
* and Imbl which means something completed.
* There's one spurious interrupt left over from
* initialisation, ignore it.
* In order to share PCI IRQs, just ignore spurious interrupts.
*/
rinterrupt = inb(port+Rinterrupt);
rstatus = inb(port+Rstatus);
outb(port+Rcontrol, Rint);
if(0 && (rinterrupt & ~(Cmdc|Imbl)) != Intv && ctlr->spurious++)
print("%s: interrupt 0x%2.2ux\n",
ctlr->sdev->name, rinterrupt);
if((rinterrupt & Cmdc) && (rstatus & Cmdinv))
print("%s: command invalid\n", ctlr->sdev->name);
/*
* Look for something in the mail.
* If there is, free the mailbox and wakeup whoever.
*/
mb = ctlr->mb;
for(mbox = &mb[ctlr->mbix]; mbox->code; mbox = &mb[ctlr->mbix]){
pa = (mbox->ccb[3]<<24)
|(mbox->ccb[2]<<16)
|(mbox->ccb[1]<<8)
|mbox->ccb[0];
if(ctlr->pcidev)
ccb = BPA2K(pa, ctlr->pcidev->tbdf);
else
ccb = BPA2K(pa, BUSUNKNOWN);
mbox->code = 0;
ccb->done = 1;
wakeup(ccb);
ctlr->mbix++;
if(ctlr->mbix >= NMbox+NMbox)
ctlr->mbix = NMbox;
}
}
static int
mylexrio(SDreq* r)
{
int subno;
Ctlr *ctlr;
subno = r->unit->subno;
ctlr = r->unit->dev->ctlr;
if(subno == ctlr->id || (!ctlr->wide && subno >= 8))
r->status = SDtimeout;
else if(ctlr->bus == 24)
r->status = mylex24rio(r);
else
r->status = mylex32rio(r);
return r->status;
}
/*
* Issue a command to a controller. The command and its length is
* contained in cmd and cmdlen. If any data is to be
* returned, datalen should be non-zero, and the returned data
* will be placed in data.
* If Cmdc is set, bail out, the invalid command will be handled
* when the interrupt is processed.
*/
static void
issueio(int port, uchar* cmd, int cmdlen, uchar* data, int datalen)
{
int len;
if(cmd[0] != Cstart && cmd[0] != Ceombri){
while(!(inb(port+Rstatus) & Hardy))
;
}
outb(port+Rcpr, cmd[0]);
len = 1;
while(len < cmdlen){
if(!(inb(port+Rstatus) & Cprbsy)){
outb(port+Rcpr, cmd[len]);
len++;
}
if(inb(port+Rinterrupt) & Cmdc)
return;
}
if(datalen){
len = 0;
while(len < datalen){
if(inb(port+Rstatus) & Dirrdy){
data[len] = inb(port+Rdatain);
len++;
}
if(inb(port+Rinterrupt) & Cmdc)
return;
}
}
}
/*
* Issue a command to a controller, wait for it to complete then
* try to reset the interrupt. Should only be called at initialisation.
*/
static int
issue(Ctlr* ctlr, uchar* cmd, int cmdlen, uchar* data, int datalen)
{
int port;
uchar rinterrupt, rstatus;
static Lock mylexissuelock;
port = ctlr->port;
ilock(&ctlr->issuelock);
issueio(port, cmd, cmdlen, data, datalen);
while(!((rinterrupt = inb(port+Rinterrupt)) & Cmdc))
;
rstatus = inb(port+Rstatus);
outb(port+Rcontrol, Rint);
iunlock(&ctlr->issuelock);
if((rinterrupt & Cmdc) && (rstatus & Cmdinv))
return 0;
return 1;
}
static SDev*
mylexprobe(int port, int irq)
{
SDev *sdev;
Ctlr *ctlr;
uchar cmd[6], data[256];
int clen, dlen, timeo;
if(ioalloc(port, 0x3, 0, "mylex") < 0)
return nil;
ctlr = nil;
sdev = nil;
/*
* Attempt to hard-reset the board and reset
* the SCSI bus. If the board state doesn't settle to
* idle with mailbox initialisation required, either
* it isn't a compatible board or it's broken.
* If the controller has SCAM set this can take a while.
*/
if(getconf("*noscsireset") != nil)
outb(port+Rcontrol, Rhard);
else
outb(port+Rcontrol, Rhard|Rsbus);
for(timeo = 0; timeo < 100; timeo++){
if(inb(port+Rstatus) == (Inreq|Hardy))
break;
delay(100);
}
if(inb(port+Rstatus) != (Inreq|Hardy)){
buggery:
if(ctlr != nil)
free(ctlr);
if (sdev != nil)
free(sdev);
iofree(port);
return nil;
}
if((ctlr = malloc(sizeof(Ctlr))) == nil)
goto buggery;
ctlr->port = port;
ctlr->irq = irq;
ctlr->bus = 24;
ctlr->wide = 0;
/*
* Try to determine if this is a 32-bit MultiMaster controller
* by attempting to obtain the extended inquiry information;
* this command is not implemented on Adaptec 154xx
* controllers. If successful, the first byte of the returned
* data is the host adapter bus type, 'E' for 32-bit EISA,
* PCI and VLB buses.
*/
cmd[0] = Ciesi;
cmd[1] = 14;
clen = 2;
dlen = 256;
if(issue(ctlr, cmd, clen, data, dlen)){
if(data[0] == 'E')
ctlr->bus = 32;
print("mylex ctlr @ port 0x%ux: 32-bit ", ctlr->port);
ctlr->wide = data[0x0D] & 0x01;
if (ctlr->wide)
print("wide ");
else
print("narrow ");
print("SCSI host adapter\n");
}
else{
/*
* Inconceivable though it may seem, a hard controller reset
* is necessary here to clear out the command queue. Every
* board seems to lock-up in a different way if you give an
* invalid command and then try to clear out the
* command/parameter and/or data-in register.
* Soft reset doesn't do the job either. Fortunately no
* serious initialisation has been done yet so there's nothing
* to tidy up.
*/
outb(port+Rcontrol, Rhard);
for(timeo = 0; timeo < 100; timeo++){
if(inb(port+Rstatus) == (Inreq|Hardy))
break;
delay(100);
}
if(inb(port+Rstatus) != (Inreq|Hardy))
goto buggery;
}
/*
* If the BIOS is enabled on the AHA-1542C/CF and BIOS options for
* support of drives > 1Gb, dynamic scanning of the SCSI bus or more
* than 2 drives under DOS 5.0 are enabled, the BIOS disables
* accepting Cmbinit to protect against running with drivers which
* don't support those options. In order to unlock the interface it
* is necessary to read a lock-code using Cextbios and write it back
* using Cmbienable; the lock-code is non-zero.
*/
cmd[0] = Cinquiry;
clen = 1;
dlen = 4;
if(issue(ctlr, cmd, clen, data, dlen) == 0)
goto buggery;
if(data[0] >= 0x43){
cmd[0] = Cextbios;
clen = 1;
dlen = 2;
if(issue(ctlr, cmd, clen, data, dlen) == 0)
goto buggery;
/*
* Lock-code returned in data[1]. If it's non-zero write
* it back along with bit 0 of byte 0 cleared to enable
* mailbox initialisation.
*/
if(data[1]){
cmd[0] = Cmbienable;
cmd[1] = 0;
cmd[2] = data[1];
clen = 3;
if(issue(ctlr, cmd, clen, 0, 0) == 0)
goto buggery;
}
}
/*
* Get the id, DMA and IRQ info from the board. This will
* cause an interrupt which will hopefully not cause any
* trouble because the interrupt number isn't known yet.
* This is necessary as the DMA won't be set up if the
* board has the BIOS disabled.
*
* If the IRQ is already known, this must be a 32-bit PCI
* or EISA card, in which case the returned DMA and IRQ can
* be ignored.
*/
cmd[0] = Cinquire;
clen = 1;
dlen = 3;
if(issue(ctlr, cmd, clen, data, dlen) == 0)
goto buggery;
ctlr->id = data[2] & 0x07;
if(ctlr->irq < 0){
switch(data[0]){ /* DMA Arbitration Priority */
case 0x80: /* Channel 7 */
outb(0xD6, 0xC3);
outb(0xD4, 0x03);
break;
case 0x40: /* Channel 6 */
outb(0xD6, 0xC2);
outb(0xD4, 0x02);
break;
case 0x20: /* Channel 5 */
outb(0xD6, 0xC1);
outb(0xD4, 0x01);
break;
case 0x01: /* Channel 0 */
outb(0x0B, 0xC0);
outb(0x0A, 0x00);
break;
default:
if(ctlr->bus == 24)
goto buggery;
break;
}
switch(data[1]){ /* Interrupt Channel */
case 0x40:
ctlr->irq = 15;
break;
case 0x20:
ctlr->irq = 14;
break;
case 0x08:
ctlr->irq = 12;
break;
case 0x04:
ctlr->irq = 11;
break;
case 0x02:
ctlr->irq = 10;
break;
case 0x01:
ctlr->irq = 9;
break;
default:
goto buggery;
}
}
if((sdev = malloc(sizeof(SDev))) == nil)
goto buggery;
sdev->ifc = &sdmylexifc;
sdev->ctlr = ctlr;
sdev->idno = '0';
ctlr->sdev = sdev;
if(!ctlr->wide)
sdev->nunit = 8;
else
sdev->nunit = 16;
return sdev;
}
static int mylexport[8] = {
0x330, 0x334, 0x230, 0x234, 0x130, 0x134, 0x000, 0x000,
};
static SDev*
mylexpnp(void)
{
Pcidev *p;
Ctlr *ctlr;
ISAConf isa;
int cfg, ctlrno, i, x;
SDev *sdev, *head, *tail;
p = nil;
head = tail = nil;
while(p = pcimatch(p, 0x104B, 0)){
if((sdev = mylexprobe(p->mem[0].bar & ~0x01, p->intl)) == nil)
continue;
ctlr = sdev->ctlr;
ctlr->pcidev = p;
if(head != nil)
tail->next = sdev;
else
head = sdev;
tail = sdev;
}
if(strncmp(KADDR(0xFFFD9), "EISA", 4) == 0){
for(cfg = 0x1000; cfg < MaxEISA*0x1000; cfg += 0x1000){
x = 0;
for(i = 0; i < 4; i++)
x |= inb(cfg+CfgEISA+i)<<(i*8);
if(x != 0x0142B30A && x != 0x0242B30A)
continue;
x = inb(cfg+0xC8C);
if((sdev = mylexprobe(mylexport[x & 0x07], -1)) == nil)
continue;
if(head != nil)
tail->next = sdev;
else
head = sdev;
tail = sdev;
}
}
for(ctlrno = 0; ctlrno < 4; ctlrno++){
memset(&isa, 0, sizeof(isa));
if(!isaconfig("scsi", ctlrno, &isa))
continue;
if(strcmp(isa.type, "aha1542"))
continue;
if((sdev = mylexprobe(isa.port, -1)) == nil)
continue;
if(head != nil)
tail->next = sdev;
else
head = sdev;
tail = sdev;
}
return head;
}
static int
mylex24enable(Ctlr* ctlr)
{
ulong p;
Ccb24 *ccb, *ccbp;
uchar cmd[6], *v;
int len;
len = (sizeof(Mbox24)*NMbox*2)+(sizeof(Ccb24)*NCcb);
v = xspanalloc(len, 32, 0);
if(!PADDR24(ctlr, sizeof(Ctlr)) || !PADDR24(v, len))
return 0;
ctlr->mb = v;
v += sizeof(Mbox24)*NMbox*2;
ccb = (Ccb24*)v;
for(ccbp = ccb; ccbp < &ccb[NCcb]; ccbp++){
ccbp->ccb = ctlr->ccb;
ctlr->ccb = (Ccb*)ccbp;
}
/*
* Initialise the software controller and
* set the board scanning the mailboxes.
*/
ctlr->mbix = NMbox;
cmd[0] = Cinitialise;
cmd[1] = NMbox;
p = K2BPA(ctlr->mb, BUSUNKNOWN);
cmd[2] = p>>16;
cmd[3] = p>>8;
cmd[4] = p;
return issue(ctlr, cmd, 5, 0, 0);
}
static int
mylex32enable(Ctlr* ctlr)
{
ulong p;
Ccb32 *ccb, *ccbp;
uchar cmd[6], *v;
v = xspanalloc((sizeof(Mbox32)*NMbox*2)+(sizeof(Ccb32)*NCcb), 32, 0);
ctlr->mb = v;
v += sizeof(Mbox32)*NMbox*2;
ccb = (Ccb32*)v;
for(ccbp = ccb; ccbp < &ccb[NCcb]; ccbp++){
/*
* Fill in some stuff that doesn't change.
*/
ccbp->senselen = sizeof(ccbp->sense);
p = PADDR(ccbp->sense);
ccbp->senseptr[0] = p;
ccbp->senseptr[1] = p>>8;
ccbp->senseptr[2] = p>>16;
ccbp->senseptr[3] = p>>24;
ccbp->ccb = ctlr->ccb;
ctlr->ccb = (Ccb*)ccbp;
}
/*
* Attempt wide mode setup.
*/
if(ctlr->wide){
cmd[0] = Cwide;
cmd[1] = 1;
if(!issue(ctlr, cmd, 2, 0, 0)) {
ctlr->wide = 0;
print(
"mylex32enable: ctlr @ port 0x%ux: scsi wide-mode setup failed on wide host adapter",
ctlr->port);
}
}
/*
* Initialise the software controller and
* set the board scanning the mailboxes.
*/
ctlr->mbix = NMbox;
cmd[0] = Ciem;
cmd[1] = NMbox;
if(ctlr->pcidev)
p = K2BPA(ctlr->mb, ctlr->tbdf);
else
p = K2BPA(ctlr->mb, BUSUNKNOWN);
cmd[2] = p;
cmd[3] = p>>8;
cmd[4] = p>>16;
cmd[5] = p>>24;
return issue(ctlr, cmd, 6, 0, 0);
}
static int
mylexenable(SDev* sdev)
{
int tbdf;
Ctlr *ctlr;
void (*interrupt)(Ureg*, void*);
char name[32];
ctlr = sdev->ctlr;
if(ctlr->cache == nil){
if((ctlr->cache = malloc(sdev->nunit*sizeof(Ccb*))) == nil)
return 0;
}
tbdf = BUSUNKNOWN;
if(ctlr->bus == 32){
if(ctlr->pcidev){
tbdf = ctlr->pcidev->tbdf;
pcisetbme(ctlr->pcidev);
}
if(!mylex32enable(ctlr))
return 0;
interrupt = mylex32interrupt;
}
else if(mylex24enable(ctlr))
interrupt = mylex24interrupt;
else
return 0;
snprint(name, sizeof(name), "sd%c (%s)", sdev->idno, sdev->ifc->name);
intrenable(ctlr->irq, interrupt, ctlr, tbdf, name);
return 1;
}
SDifc sdmylexifc = {
"mylex", /* name */
mylexpnp, /* pnp */
nil, /* legacy */
mylexenable, /* enable */
nil, /* disable */
scsiverify, /* verify */
scsionline, /* online */
mylexrio, /* rio */
nil, /* rctl */
nil, /* wctl */
scsibio, /* bio */
nil, /* probe */
nil, /* clear */
nil, /* rtopctl */
nil, /* wtopctl */
};