ref: a57a6e511f15c02b4fd2690197b6f1333b171193
dir: /sys/src/9/bitsy/sdata.c/
#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 SDifc sdataifc;
//BUG?
#define PCIWADDR(x) ((ulong)(x))
enum {
DbgCONFIG = 0x01, /* detected drive config info */
DbgIDENTIFY = 0x02, /* detected drive identify info */
DbgSTATE = 0x04, /* dump state on panic */
DbgPROBE = 0x08, /* trace device probing */
DbgDEBUG = 0x80, /* the current problem... */
};
#define DEBUG (DbgDEBUG|DbgSTATE|DbgCONFIG)
enum { /* I/O ports */
Data = 0,
Error = 1, /* (read) */
Features = 1, /* (write) */
Count = 2, /* sector count */
Ir = 2, /* interrupt reason (PACKET) */
Sector = 3, /* sector number, LBA<7-0> */
Cyllo = 4, /* cylinder low, LBA<15-8> */
Bytelo = 4, /* byte count low (PACKET) */
Cylhi = 5, /* cylinder high, LBA<23-16> */
Bytehi = 5, /* byte count hi (PACKET) */
Dh = 6, /* Device/Head, LBA<32-14> */
Status = 7, /* (read) */
Command = 7, /* (write) */
As = 2, /* Alternate Status (read) */
Dc = 2, /* Device Control (write) */
};
enum { /* Error */
Med = 0x01, /* Media error */
Ili = 0x01, /* command set specific (PACKET) */
Nm = 0x02, /* No Media */
Eom = 0x02, /* command set specific (PACKET) */
Abrt = 0x04, /* Aborted command */
Mcr = 0x08, /* Media Change Request */
Idnf = 0x10, /* no user-accessible address */
Mc = 0x20, /* Media Change */
Unc = 0x40, /* Uncorrectable data error */
Wp = 0x40, /* Write Protect */
Icrc = 0x80, /* Interface CRC error */
};
enum { /* Features */
Dma = 0x01, /* data transfer via DMA (PACKET) */
Ovl = 0x02, /* command overlapped (PACKET) */
};
enum { /* Interrupt Reason */
Cd = 0x01, /* Command/Data */
Io = 0x02, /* I/O direction */
Rel = 0x04, /* Bus Release */
};
enum { /* Device/Head */
Dev0 = 0xA0, /* Master */
Dev1 = 0xB0, /* Slave */
Lba = 0x40, /* LBA mode */
};
enum { /* Status, Alternate Status */
Err = 0x01, /* Error */
Chk = 0x01, /* Check error (PACKET) */
Drq = 0x08, /* Data Request */
Dsc = 0x10, /* Device Seek Complete */
Serv = 0x10, /* Service */
Df = 0x20, /* Device Fault */
Dmrd = 0x20, /* DMA ready (PACKET) */
Drdy = 0x40, /* Device Ready */
Bsy = 0x80, /* Busy */
};
enum { /* Command */
Cnop = 0x00, /* NOP */
Cdr = 0x08, /* Device Reset */
Crs = 0x20, /* Read Sectors */
Cws = 0x30, /* Write Sectors */
Cedd = 0x90, /* Execute Device Diagnostics */
Cpkt = 0xA0, /* Packet */
Cidpkt = 0xA1, /* Identify Packet Device */
Crsm = 0xC4, /* Read Multiple */
Cwsm = 0xC5, /* Write Multiple */
Csm = 0xC6, /* Set Multiple */
Crdq = 0xC7, /* Read DMA queued */
Crd = 0xC8, /* Read DMA */
Cwd = 0xCA, /* Write DMA */
Cwdq = 0xCC, /* Write DMA queued */
Cstandby = 0xE2, /* Standby */
Cid = 0xEC, /* Identify Device */
Csf = 0xEF, /* Set Features */
};
enum { /* Device Control */
Nien = 0x02, /* (not) Interrupt Enable */
Srst = 0x04, /* Software Reset */
};
enum { /* PCI Configuration Registers */
Bmiba = 0x20, /* Bus Master Interface Base Address */
Idetim = 0x40, /* IE Timing */
Sidetim = 0x44, /* Slave IE Timing */
Udmactl = 0x48, /* Ultra DMA/33 Control */
Udmatim = 0x4A, /* Ultra DMA/33 Timing */
};
enum { /* Bus Master IDE I/O Ports */
Bmicx = 0, /* Command */
Bmisx = 2, /* Status */
Bmidtpx = 4, /* Descriptor Table Pointer */
};
enum { /* Bmicx */
Ssbm = 0x01, /* Start/Stop Bus Master */
Rwcon = 0x08, /* Read/Write Control */
};
enum { /* Bmisx */
Bmidea = 0x01, /* Bus Master IDE Active */
Idedmae = 0x02, /* IDE DMA Error (R/WC) */
Ideints = 0x04, /* IDE Interrupt Status (R/WC) */
Dma0cap = 0x20, /* Drive 0 DMA Capable */
Dma1cap = 0x40, /* Drive 0 DMA Capable */
};
enum { /* Physical Region Descriptor */
PrdEOT = 0x80000000, /* Bus Master IDE Active */
};
enum { /* offsets into the identify info. */
Iconfig = 0, /* general configuration */
Ilcyl = 1, /* logical cylinders */
Ilhead = 3, /* logical heads */
Ilsec = 6, /* logical sectors per logical track */
Iserial = 10, /* serial number */
Ifirmware = 23, /* firmware revision */
Imodel = 27, /* model number */
Imaxrwm = 47, /* max. read/write multiple sectors */
Icapabilities = 49, /* capabilities */
Istandby = 50, /* device specific standby timer */
Ipiomode = 51, /* PIO data transfer mode number */
Ivalid = 53,
Iccyl = 54, /* cylinders if (valid&0x01) */
Ichead = 55, /* heads if (valid&0x01) */
Icsec = 56, /* sectors if (valid&0x01) */
Iccap = 57, /* capacity if (valid&0x01) */
Irwm = 59, /* read/write multiple */
Ilba0 = 60, /* LBA size */
Ilba1 = 61, /* LBA size */
Imwdma = 63, /* multiword DMA mode */
Iapiomode = 64, /* advanced PIO modes supported */
Iminmwdma = 65, /* min. multiword DMA cycle time */
Irecmwdma = 66, /* rec. multiword DMA cycle time */
Iminpio = 67, /* min. PIO cycle w/o flow control */
Iminiordy = 68, /* min. PIO cycle with IORDY */
Ipcktbr = 71, /* time from PACKET to bus release */
Iserbsy = 72, /* time from SERVICE to !Bsy */
Iqdepth = 75, /* max. queue depth */
Imajor = 80, /* major version number */
Iminor = 81, /* minor version number */
Icsfs = 82, /* command set/feature supported */
Icsfe = 85, /* command set/feature enabled */
Iudma = 88, /* ultra DMA mode */
Ierase = 89, /* time for security erase */
Ieerase = 90, /* time for enhanced security erase */
Ipower = 91, /* current advanced power management */
Irmsn = 127, /* removable status notification */
Istatus = 128, /* security status */
};
typedef struct Ctlr Ctlr;
typedef struct Drive Drive;
typedef struct Prd {
ulong pa; /* Physical Base Address */
int count;
} Prd;
enum {
Nprd = SDmaxio/(64*1024)+2,
};
typedef struct Ctlr {
int cmdport;
int ctlport;
int irq;
int tbdf;
int bmiba; /* bus master interface base address */
void (*ienable)(Ctlr*);
SDev* sdev;
Drive* drive[2];
Prd* prdt; /* physical region descriptor table */
QLock; /* current command */
Drive* curdrive;
int command; /* last command issued (debugging) */
Rendez;
int done;
Lock; /* register access */
} Ctlr;
typedef struct Drive {
Ctlr* ctlr;
int dev;
ushort info[256];
int c; /* cylinder */
int h; /* head */
int s; /* sector */
int sectors; /* total */
int secsize; /* sector size */
int dma; /* DMA R/W possible */
int dmactl;
int rwm; /* read/write multiple possible */
int rwmctl;
int pkt; /* PACKET device, length of pktcmd */
uchar pktcmd[16];
int pktdma; /* this PACKET command using dma */
uchar sense[18];
uchar inquiry[48];
QLock; /* drive access */
int command; /* current command */
int write;
uchar* data;
int dlen;
uchar* limit;
int count; /* sectors */
int block; /* R/W bytes per block */
int status;
int error;
} Drive;
static void
atadumpstate(Drive* drive, uchar* cmd, int lba, int count)
{
Prd *prd;
Ctlr *ctlr;
int i, bmiba;
if(!(DEBUG & DbgSTATE)){
USED(drive, cmd, lba, count);
return;
}
ctlr = drive->ctlr;
print("command %2.2uX\n", ctlr->command);
print("data %8.8p limit %8.8p dlen %d status %uX error %uX\n",
drive->data, drive->limit, drive->dlen,
drive->status, drive->error);
if(cmd != nil){
print("lba %d -> %d, count %d -> %d (%d)\n",
(cmd[2]<<24)|(cmd[3]<<16)|(cmd[4]<<8)|cmd[5], lba,
(cmd[7]<<8)|cmd[8], count, drive->count);
}
if(!(inb(ctlr->ctlport+As) & Bsy)){
for(i = 1; i < 7; i++)
print(" 0x%2.2uX", inb(ctlr->cmdport+i));
print(" 0x%2.2uX\n", inb(ctlr->ctlport+As));
}
if(drive->command == Cwd || drive->command == Crd){
bmiba = ctlr->bmiba;
prd = ctlr->prdt;
print("bmicx %2.2uX bmisx %2.2uX prdt %8.8p\n",
inb(bmiba+Bmicx), inb(bmiba+Bmisx), prd);
for(;;){
print("pa 0x%8.8luX count %8.8uX\n",
prd->pa, prd->count);
if(prd->count & PrdEOT)
break;
prd++;
}
}
}
static int
atadebug(int cmdport, int ctlport, char* fmt, ...)
{
int i, n;
va_list arg;
char buf[PRINTSIZE];
if(!(DEBUG & DbgPROBE)){
USED(cmdport, ctlport, fmt);
return 0;
}
va_start(arg, fmt);
n = vseprint(buf, buf+sizeof(buf), fmt, arg) - buf;
va_end(arg);
if(cmdport){
if(buf[n-1] == '\n')
n--;
n += snprint(buf+n, PRINTSIZE-n, " ataregs 0x%uX:",
cmdport);
for(i = Features; i < Command; i++)
n += snprint(buf+n, PRINTSIZE-n, " 0x%2.2uX",
inb(cmdport+i));
if(ctlport)
n += snprint(buf+n, PRINTSIZE-n, " 0x%2.2uX",
inb(ctlport+As));
n += snprint(buf+n, PRINTSIZE-n, "\n");
}
putstrn(buf, n);
return n;
}
static int
ataready(int cmdport, int ctlport, int dev, int reset, int ready, int micro)
{
int as;
atadebug(cmdport, ctlport, "ataready: dev %uX reset %uX ready %uX",
dev, reset, ready);
for(;;){
/*
* Wait for the controller to become not busy and
* possibly for a status bit to become true (usually
* Drdy). Must change to the appropriate device
* register set if necessary before testing for ready.
* Always run through the loop at least once so it
* can be used as a test for !Bsy.
*/
as = inb(ctlport+As);
if((as & reset) == 0){
if(dev){
outb(cmdport+Dh, dev);
dev = 0;
}
else if(ready == 0 || (as & ready)){
atadebug(0, 0, "ataready: %d 0x%2.2uX\n", micro, as);
return as;
}
}
if(micro-- <= 0){
atadebug(0, 0, "ataready: %d 0x%2.2uX\n", micro, as);
break;
}
microdelay(4);
}
atadebug(cmdport, ctlport, "ataready: timeout");
return -1;
}
static int
atacsf(Drive* drive, vlong csf, int supported)
{
ushort *info;
int cmdset, i, x;
if(supported)
info = &drive->info[Icsfs];
else
info = &drive->info[Icsfe];
for(i = 0; i < 3; i++){
x = (csf>>(16*i)) & 0xFFFF;
if(x == 0)
continue;
cmdset = info[i];
if(cmdset == 0 || cmdset == 0xFFFF)
return 0;
return cmdset & x;
}
return 0;
}
static int
atadone(void* arg)
{
return ((Ctlr*)arg)->done;
}
static int
atarwmmode(Drive* drive, int cmdport, int ctlport, int dev)
{
int as, maxrwm, rwm;
maxrwm = (drive->info[Imaxrwm] & 0xFF);
if(maxrwm == 0)
return 0;
/*
* Sometimes drives come up with the current count set
* to 0; if so, set a suitable value, otherwise believe
* the value in Irwm if the 0x100 bit is set.
*/
if(drive->info[Irwm] & 0x100)
rwm = (drive->info[Irwm] & 0xFF);
else
rwm = 0;
if(rwm == 0)
rwm = maxrwm;
if(rwm > 16)
rwm = 16;
if(ataready(cmdport, ctlport, dev, Bsy|Drq, Drdy, 102*1000) < 0)
return 0;
outb(cmdport+Count, rwm);
outb(cmdport+Command, Csm);
microdelay(4);
as = ataready(cmdport, ctlport, 0, Bsy, Drdy|Df|Err, 1000);
inb(cmdport+Status);
if(as < 0 || (as & (Df|Err)))
return 0;
drive->rwm = rwm;
return rwm;
}
static int
atadmamode(Drive* drive)
{
int dma;
/*
* Check if any DMA mode enabled.
* Assumes the BIOS has picked and enabled the best.
* This is completely passive at the moment, no attempt is
* made to ensure the hardware is correctly set up.
*/
dma = drive->info[Imwdma] & 0x0707;
drive->dma = (dma>>8) & dma;
if(drive->dma == 0 && (drive->info[Ivalid] & 0x04)){
dma = drive->info[Iudma] & 0x1F1F;
drive->dma = (dma>>8) & dma;
if(drive->dma)
drive->dma |= 'U'<<16;
}
return dma;
}
static int
ataidentify(int cmdport, int ctlport, int dev, int pkt, void* info)
{
int as, command, drdy;
if(pkt){
command = Cidpkt;
drdy = 0;
}
else{
command = Cid;
drdy = Drdy;
}
as = ataready(cmdport, ctlport, dev, Bsy|Drq, drdy, 103*1000);
if(as < 0)
return as;
outb(cmdport+Command, command);
microdelay(4);
as = ataready(cmdport, ctlport, 0, Bsy, Drq|Err, 400*1000);
if(as < 0)
return -1;
if(as & Err)
return as;
memset(info, 0, 512);
inss(cmdport+Data, info, 256);
inb(cmdport+Status);
if(DEBUG & DbgIDENTIFY){
int i;
ushort *sp;
sp = (ushort*)info;
for(i = 0; i < 32; i++){
if(i && (i%16) == 0)
print("\n");
print(" %4.4uX", *sp);
sp++;
}
print("\n");
}
return 0;
}
static Drive*
atadrive(int cmdport, int ctlport, int dev)
{
ushort *sp;
Drive *drive;
int as, i, pkt;
uchar buf[512], *p;
atadebug(0, 0, "identify: port 0x%uX dev 0x%2.2uX\n", cmdport, dev);
pkt = 1;
retry:
as = ataidentify(cmdport, ctlport, dev, pkt, buf);
if(as < 0)
return nil;
if(as & Err){
if(pkt == 0)
return nil;
pkt = 0;
goto retry;
}
if((drive = malloc(sizeof(Drive))) == nil)
return nil;
drive->dev = dev;
memmove(drive->info, buf, sizeof(drive->info));
drive->sense[0] = 0x70;
drive->sense[7] = sizeof(drive->sense)-7;
drive->inquiry[2] = 2;
drive->inquiry[3] = 2;
drive->inquiry[4] = sizeof(drive->inquiry)-4;
p = &drive->inquiry[8];
sp = &drive->info[Imodel];
for(i = 0; i < 20; i++){
*p++ = *sp>>8;
*p++ = *sp++;
}
drive->secsize = 512;
if(drive->info[Iconfig] != 0x848A && (drive->info[Iconfig] & 0xC000) == 0x8000){
if(drive->info[Iconfig] & 0x01)
drive->pkt = 16;
else
drive->pkt = 12;
}
else{
if(drive->info[Ivalid] & 0x0001){
drive->c = drive->info[Ilcyl];
drive->h = drive->info[Ilhead];
drive->s = drive->info[Ilsec];
}
else{
drive->c = drive->info[Iccyl];
drive->h = drive->info[Ichead];
drive->s = drive->info[Icsec];
}
if(drive->info[Icapabilities] & 0x0200){
drive->sectors = (drive->info[Ilba1]<<16)
|drive->info[Ilba0];
drive->dev |= Lba;
}
else
drive->sectors = drive->c*drive->h*drive->s;
atarwmmode(drive, cmdport, ctlport, dev);
}
atadmamode(drive);
if(DEBUG & DbgCONFIG){
print("dev %2.2uX port %uX config %4.4uX capabilities %4.4uX",
dev, cmdport,
drive->info[Iconfig], drive->info[Icapabilities]);
print(" mwdma %4.4uX", drive->info[Imwdma]);
if(drive->info[Ivalid] & 0x04)
print(" udma %4.4uX", drive->info[Iudma]);
print(" dma %8.8uX rwm %ud\n", drive->dma, drive->rwm);
}
return drive;
}
static void
atasrst(int ctlport)
{
/*
* Srst is a big stick and may cause problems if further
* commands are tried before the drives become ready again.
* Also, there will be problems here if overlapped commands
* are ever supported.
*/
microdelay(20);
outb(ctlport+Dc, Srst);
microdelay(20);
outb(ctlport+Dc, 0);
microdelay(4*1000);
}
static SDev*
ataprobe(int cmdport, int ctlport, int irq)
{
Ctlr* ctlr;
SDev *sdev;
Drive *drive;
int dev, error, rhi, rlo;
/*
* Try to detect a floating bus.
* Bsy should be cleared. If not, see if the cylinder registers
* are read/write capable.
* If the master fails, try the slave to catch slave-only
* configurations.
* There's no need to restore the tested registers as they will
* be reset on any detected drives by the Cedd command.
* All this indicates is that there is at least one drive on the
* controller; when the non-existent drive is selected in a
* single-drive configuration the registers of the existing drive
* are often seen, only command execution fails.
*/
dev = Dev0;
if(inb(ctlport+As) & Bsy){
outb(cmdport+Dh, dev);
microdelay(5);
trydev1:
atadebug(cmdport, ctlport, "ataprobe bsy");
outb(cmdport+Cyllo, 0xAA);
outb(cmdport+Cylhi, 0x55);
outb(cmdport+Sector, 0xFF);
rlo = inb(cmdport+Cyllo);
rhi = inb(cmdport+Cylhi);
if(rlo != 0xAA && (rlo == 0xFF || rhi != 0x55)){
if(dev == Dev1){
release:
return nil;
}
dev = Dev1;
if(ataready(cmdport, ctlport, dev, Bsy, 0, 20*1000) < 0)
goto trydev1;
}
}
/*
* Disable interrupts on any detected controllers.
*/
outb(ctlport+Dc, Nien);
tryedd1:
if(ataready(cmdport, ctlport, dev, Bsy|Drq, 0, 105*1000) < 0){
/*
* There's something there, but it didn't come up clean,
* so try hitting it with a big stick. The timing here is
* wrong but this is a last-ditch effort and it sometimes
* gets some marginal hardware back online.
*/
atasrst(ctlport);
if(ataready(cmdport, ctlport, dev, Bsy|Drq, 0, 106*1000) < 0)
goto release;
}
/*
* Can only get here if controller is not busy.
* If there are drives Bsy will be set within 400nS,
* must wait 2mS before testing Status.
* Wait for the command to complete (6 seconds max).
*/
outb(cmdport+Command, Cedd);
delay(5);
if(ataready(cmdport, ctlport, dev, Bsy|Drq, 0, 6*1000*1000) < 0)
goto release;
/*
* If bit 0 of the error register is set then the selected drive
* exists. This is enough to detect single-drive configurations.
* However, if the master exists there is no way short of executing
* a command to determine if a slave is present.
* It appears possible to get here testing Dev0 although it doesn't
* exist and the EDD won't take, so try again with Dev1.
*/
error = inb(cmdport+Error);
atadebug(cmdport, ctlport, "ataprobe: dev %uX", dev);
if((error & ~0x80) != 0x01){
if(dev == Dev1)
goto release;
dev = Dev1;
goto tryedd1;
}
/*
* At least one drive is known to exist, try to
* identify it. If that fails, don't bother checking
* any further.
* If the one drive found is Dev0 and the EDD command
* didn't indicate Dev1 doesn't exist, check for it.
*/
if((drive = atadrive(cmdport, ctlport, dev)) == nil)
goto release;
if((ctlr = malloc(sizeof(Ctlr))) == nil){
free(drive);
goto release;
}
if((sdev = malloc(sizeof(SDev))) == nil){
free(ctlr);
free(drive);
goto release;
}
drive->ctlr = ctlr;
if(dev == Dev0){
ctlr->drive[0] = drive;
#ifdef notdef
if(!(error & 0x80)){
/*
* Always leave Dh pointing to a valid drive,
* otherwise a subsequent call to ataready on
* this controller may try to test a bogus Status.
* Ataprobe is the only place possibly invalid
* drives should be selected.
*/
drive = atadrive(cmdport, ctlport, Dev1);
if(drive != nil){
drive->ctlr = ctlr;
ctlr->drive[1] = drive;
}
else{
outb(cmdport+Dh, Dev0);
microdelay(1);
}
}
#endif
}
else
ctlr->drive[1] = drive;
ctlr->cmdport = cmdport;
ctlr->ctlport = ctlport;
ctlr->irq = irq;
ctlr->tbdf = -1;
ctlr->command = Cedd; /* debugging */
sdev->ifc = &sdataifc;
sdev->ctlr = ctlr;
sdev->idno = 'C';
sdev->nunit = 1;
ctlr->sdev = sdev;
return sdev;
}
static int
atasetsense(Drive* drive, int status, int key, int asc, int ascq)
{
drive->sense[2] = key;
drive->sense[12] = asc;
drive->sense[13] = ascq;
return status;
}
static int
atastandby(Drive* drive, int period)
{
Ctlr* ctlr;
int cmdport, done;
ctlr = drive->ctlr;
drive->command = Cstandby;
qlock(ctlr);
cmdport = ctlr->cmdport;
ilock(ctlr);
outb(cmdport+Count, period);
outb(cmdport+Dh, drive->dev);
ctlr->done = 0;
ctlr->curdrive = drive;
ctlr->command = Cstandby; /* debugging */
outb(cmdport+Command, Cstandby);
iunlock(ctlr);
while(waserror())
;
tsleep(ctlr, atadone, ctlr, 30*1000);
poperror();
done = ctlr->done;
qunlock(ctlr);
if(!done || (drive->status & Err))
return atasetsense(drive, SDcheck, 4, 8, drive->error);
return SDok;
}
static int
atamodesense(Drive* drive, uchar* cmd)
{
int len;
/*
* Fake a vendor-specific request with page code 0,
* return the drive info.
*/
if((cmd[2] & 0x3F) != 0 && (cmd[2] & 0x3F) != 0x3F)
return atasetsense(drive, SDcheck, 0x05, 0x24, 0);
len = (cmd[7]<<8)|cmd[8];
if(len == 0)
return SDok;
if(len < 8+sizeof(drive->info))
return atasetsense(drive, SDcheck, 0x05, 0x1A, 0);
if(drive->data == nil || drive->dlen < len)
return atasetsense(drive, SDcheck, 0x05, 0x20, 1);
memset(drive->data, 0, 8);
drive->data[0] = sizeof(drive->info)>>8;
drive->data[1] = sizeof(drive->info);
memmove(drive->data+8, drive->info, sizeof(drive->info));
drive->data += 8+sizeof(drive->info);
return SDok;
}
static void
atanop(Drive* drive, int subcommand)
{
Ctlr* ctlr;
int as, cmdport, ctlport, timeo;
/*
* Attempt to abort a command by using NOP.
* In response, the drive is supposed to set Abrt
* in the Error register, set (Drdy|Err) in Status
* and clear Bsy when done. However, some drives
* (e.g. ATAPI Zip) just go Bsy then clear Status
* when done, hence the timeout loop only on Bsy
* and the forced setting of drive->error.
*/
ctlr = drive->ctlr;
cmdport = ctlr->cmdport;
outb(cmdport+Features, subcommand);
outb(cmdport+Dh, drive->dev);
ctlr->command = Cnop; /* debugging */
outb(cmdport+Command, Cnop);
microdelay(1);
ctlport = ctlr->ctlport;
for(timeo = 0; timeo < 1000; timeo++){
as = inb(ctlport+As);
if(!(as & Bsy))
break;
microdelay(1);
}
drive->error |= Abrt;
}
static void
ataabort(Drive* drive, int dolock)
{
/*
* If NOP is available (packet commands) use it otherwise
* must try a software reset.
*/
if(dolock)
ilock(drive->ctlr);
if(atacsf(drive, 0x0000000000004000LL, 0))
atanop(drive, 0);
else{
atasrst(drive->ctlr->ctlport);
drive->error |= Abrt;
}
if(dolock)
iunlock(drive->ctlr);
}
static int
atadmasetup(Drive* drive, int )
{
drive->dmactl = 0;
return -1;
#ifdef notdef
Prd *prd;
ulong pa;
Ctlr *ctlr;
int bmiba, bmisx, count;
pa = PCIWADDR(drive->data);
if(pa & 0x03)
return -1;
ctlr = drive->ctlr;
prd = ctlr->prdt;
/*
* Sometimes drives identify themselves as being DMA capable
* although they are not on a busmastering controller.
*/
if(prd == nil){
drive->dmactl = 0;
return -1;
}
for(;;){
prd->pa = pa;
count = 64*1024 - (pa & 0xFFFF);
if(count >= len){
prd->count = PrdEOT|(len & 0xFFFF);
break;
}
prd->count = count;
len -= count;
pa += count;
prd++;
}
bmiba = ctlr->bmiba;
outl(bmiba+Bmidtpx, PCIWADDR(ctlr->prdt));
if(drive->write)
outb(ctlr->bmiba+Bmicx, 0);
else
outb(ctlr->bmiba+Bmicx, Rwcon);
bmisx = inb(bmiba+Bmisx);
outb(bmiba+Bmisx, bmisx|Ideints|Idedmae);
return 0;
#endif
}
static void
atadmastart(Ctlr* ctlr, int write)
{
if(write)
outb(ctlr->bmiba+Bmicx, Ssbm);
else
outb(ctlr->bmiba+Bmicx, Rwcon|Ssbm);
}
static int
atadmastop(Ctlr* ctlr)
{
int bmiba;
bmiba = ctlr->bmiba;
outb(bmiba+Bmicx, inb(bmiba+Bmicx) & ~Ssbm);
return inb(bmiba+Bmisx);
}
static void
atadmainterrupt(Drive* drive, int count)
{
Ctlr* ctlr;
int bmiba, bmisx;
ctlr = drive->ctlr;
bmiba = ctlr->bmiba;
bmisx = inb(bmiba+Bmisx);
switch(bmisx & (Ideints|Idedmae|Bmidea)){
case Bmidea:
/*
* Data transfer still in progress, nothing to do
* (this should never happen).
*/
return;
case Ideints:
case Ideints|Bmidea:
/*
* Normal termination, tidy up.
*/
drive->data += count;
break;
default:
/*
* What's left are error conditions (memory transfer
* problem) and the device is not done but the PRD is
* exhausted. For both cases must somehow tell the
* drive to abort.
*/
ataabort(drive, 0);
break;
}
atadmastop(ctlr);
ctlr->done = 1;
}
static void
atapktinterrupt(Drive* drive)
{
Ctlr* ctlr;
int cmdport, len;
ctlr = drive->ctlr;
cmdport = ctlr->cmdport;
switch(inb(cmdport+Ir) & (/*Rel|*/Io|Cd)){
case Cd:
outss(cmdport+Data, drive->pktcmd, drive->pkt/2);
break;
case 0:
len = (inb(cmdport+Bytehi)<<8)|inb(cmdport+Bytelo);
if(drive->data+len > drive->limit){
atanop(drive, 0);
break;
}
outss(cmdport+Data, drive->data, len/2);
drive->data += len;
break;
case Io:
len = (inb(cmdport+Bytehi)<<8)|inb(cmdport+Bytelo);
if(drive->data+len > drive->limit){
atanop(drive, 0);
break;
}
inss(cmdport+Data, drive->data, len/2);
drive->data += len;
break;
case Io|Cd:
if(drive->pktdma)
atadmainterrupt(drive, drive->dlen);
else
ctlr->done = 1;
break;
}
}
static int
atapktio(Drive* drive, uchar* cmd, int clen)
{
Ctlr *ctlr;
int as, cmdport, ctlport, len, r, timeo;
if(cmd[0] == 0x5A && (cmd[2] & 0x3F) == 0)
return atamodesense(drive, cmd);
r = SDok;
drive->command = Cpkt;
memmove(drive->pktcmd, cmd, clen);
memset(drive->pktcmd+clen, 0, drive->pkt-clen);
drive->limit = drive->data+drive->dlen;
ctlr = drive->ctlr;
cmdport = ctlr->cmdport;
ctlport = ctlr->ctlport;
qlock(ctlr);
if(ataready(cmdport, ctlport, drive->dev, Bsy|Drq, 0, 107*1000) < 0){
qunlock(ctlr);
return -1;
}
ilock(ctlr);
if(drive->dlen && drive->dmactl && !atadmasetup(drive, drive->dlen))
drive->pktdma = Dma;
else
drive->pktdma = 0;
outb(cmdport+Features, drive->pktdma);
outb(cmdport+Count, 0);
outb(cmdport+Sector, 0);
len = 16*drive->secsize;
outb(cmdport+Bytelo, len);
outb(cmdport+Bytehi, len>>8);
outb(cmdport+Dh, drive->dev);
ctlr->done = 0;
ctlr->curdrive = drive;
ctlr->command = Cpkt; /* debugging */
if(drive->pktdma)
atadmastart(ctlr, drive->write);
outb(cmdport+Command, Cpkt);
if((drive->info[Iconfig] & 0x0060) != 0x0020){
microdelay(1);
as = ataready(cmdport, ctlport, 0, Bsy, Drq|Chk, 4*1000);
if(as < 0)
r = SDtimeout;
else if(as & Chk)
r = SDcheck;
else
atapktinterrupt(drive);
}
iunlock(ctlr);
while(waserror())
;
if(!drive->pktdma)
sleep(ctlr, atadone, ctlr);
else for(timeo = 0; !ctlr->done; timeo++){
tsleep(ctlr, atadone, ctlr, 1000);
if(ctlr->done)
break;
ilock(ctlr);
atadmainterrupt(drive, 0);
if(!drive->error && timeo > 10){
ataabort(drive, 0);
atadmastop(ctlr);
drive->dmactl = 0;
drive->error |= Abrt;
}
if(drive->error){
drive->status |= Chk;
ctlr->curdrive = nil;
}
iunlock(ctlr);
}
poperror();
qunlock(ctlr);
if(drive->status & Chk)
r = SDcheck;
return r;
}
static int
atageniostart(Drive* drive, int lba)
{
Ctlr *ctlr;
int as, c, cmdport, ctlport, h, len, s;
if(drive->dev & Lba){
c = (lba>>8) & 0xFFFF;
h = (lba>>24) & 0x0F;
s = lba & 0xFF;
}
else{
c = lba/(drive->s*drive->h);
h = ((lba/drive->s) % drive->h);
s = (lba % drive->s) + 1;
}
ctlr = drive->ctlr;
cmdport = ctlr->cmdport;
ctlport = ctlr->ctlport;
if(ataready(cmdport, ctlport, drive->dev, Bsy|Drq, 0, 101*1000) < 0)
return -1;
ilock(ctlr);
if(drive->dmactl && !atadmasetup(drive, drive->count*drive->secsize)){
if(drive->write)
drive->command = Cwd;
else
drive->command = Crd;
}
else if(drive->rwmctl){
drive->block = drive->rwm*drive->secsize;
if(drive->write)
drive->command = Cwsm;
else
drive->command = Crsm;
}
else{
drive->block = drive->secsize;
if(drive->write)
drive->command = Cws;
else
drive->command = Crs;
}
drive->limit = drive->data + drive->count*drive->secsize;
outb(cmdport+Count, drive->count);
outb(cmdport+Sector, s);
outb(cmdport+Dh, drive->dev|h);
outb(cmdport+Cyllo, c);
outb(cmdport+Cylhi, c>>8);
ctlr->done = 0;
ctlr->curdrive = drive;
ctlr->command = drive->command; /* debugging */
outb(cmdport+Command, drive->command);
switch(drive->command){
case Cws:
case Cwsm:
microdelay(1);
as = ataready(cmdport, ctlport, 0, Bsy, Drq|Err, 1000);
if(as < 0 || (as & Err)){
iunlock(ctlr);
return -1;
}
len = drive->block;
if(drive->data+len > drive->limit)
len = drive->limit-drive->data;
outss(cmdport+Data, drive->data, len/2);
break;
case Crd:
case Cwd:
atadmastart(ctlr, drive->write);
break;
}
iunlock(ctlr);
return 0;
}
static int
atagenioretry(Drive* drive)
{
if(drive->dmactl)
drive->dmactl = 0;
else if(drive->rwmctl)
drive->rwmctl = 0;
else
return atasetsense(drive, SDcheck, 4, 8, drive->error);
return SDretry;
}
static int
atagenio(Drive* drive, uchar* cmd, int)
{
uchar *p;
Ctlr *ctlr;
int count, lba, len;
/*
* Map SCSI commands into ATA commands for discs.
* Fail any command with a LUN except INQUIRY which
* will return 'logical unit not supported'.
*/
if((cmd[1]>>5) && cmd[0] != 0x12)
return atasetsense(drive, SDcheck, 0x05, 0x25, 0);
switch(cmd[0]){
default:
return atasetsense(drive, SDcheck, 0x05, 0x20, 0);
case 0x00: /* test unit ready */
return SDok;
case 0x03: /* request sense */
if(cmd[4] < sizeof(drive->sense))
len = cmd[4];
else
len = sizeof(drive->sense);
if(drive->data && drive->dlen >= len){
memmove(drive->data, drive->sense, len);
drive->data += len;
}
return SDok;
case 0x12: /* inquiry */
if(cmd[4] < sizeof(drive->inquiry))
len = cmd[4];
else
len = sizeof(drive->inquiry);
if(drive->data && drive->dlen >= len){
memmove(drive->data, drive->inquiry, len);
drive->data += len;
}
return SDok;
case 0x1B: /* start/stop unit */
/*
* NOP for now, can use the power management feature
* set later.
*/
return SDok;
case 0x25: /* read capacity */
if((cmd[1] & 0x01) || cmd[2] || cmd[3])
return atasetsense(drive, SDcheck, 0x05, 0x24, 0);
if(drive->data == nil || drive->dlen < 8)
return atasetsense(drive, SDcheck, 0x05, 0x20, 1);
/*
* Read capacity returns the LBA of the last sector.
*/
len = drive->sectors-1;
p = drive->data;
*p++ = len>>24;
*p++ = len>>16;
*p++ = len>>8;
*p++ = len;
len = drive->secsize;
*p++ = len>>24;
*p++ = len>>16;
*p++ = len>>8;
*p = len;
drive->data += 8;
return SDok;
case 0x28: /* read */
case 0x2A: /* write */
break;
case 0x5A:
return atamodesense(drive, cmd);
}
ctlr = drive->ctlr;
lba = (cmd[2]<<24)|(cmd[3]<<16)|(cmd[4]<<8)|cmd[5];
count = (cmd[7]<<8)|cmd[8];
if(drive->data == nil)
return SDok;
if(drive->dlen < count*drive->secsize)
count = drive->dlen/drive->secsize;
qlock(ctlr);
while(count){
if(count > 256)
drive->count = 256;
else
drive->count = count;
if(atageniostart(drive, lba)){
ilock(ctlr);
atanop(drive, 0);
iunlock(ctlr);
qunlock(ctlr);
return atagenioretry(drive);
}
while(waserror())
;
tsleep(ctlr, atadone, ctlr, 30*1000);
poperror();
if(!ctlr->done){
/*
* What should the above timeout be? In
* standby and sleep modes it could take as
* long as 30 seconds for a drive to respond.
* Very hard to get out of this cleanly.
*/
atadumpstate(drive, cmd, lba, count);
ataabort(drive, 1);
qunlock(ctlr);
return atagenioretry(drive);
}
if(drive->status & Err){
qunlock(ctlr);
return atasetsense(drive, SDcheck, 4, 8, drive->error);
}
count -= drive->count;
lba += drive->count;
}
qunlock(ctlr);
return SDok;
}
static int
atario(SDreq* r)
{
Ctlr *ctlr;
Drive *drive;
SDunit *unit;
uchar cmd10[10], *cmdp, *p;
int clen, reqstatus, status;
unit = r->unit;
if((ctlr = unit->dev->ctlr) == nil || ctlr->drive[unit->subno] == nil){
r->status = SDtimeout;
return SDtimeout;
}
drive = ctlr->drive[unit->subno];
/*
* Most SCSI commands can be passed unchanged except for
* the padding on the end. The few which require munging
* are not used internally. Mode select/sense(6) could be
* converted to the 10-byte form but it's not worth the
* effort. Read/write(6) are easy.
*/
switch(r->cmd[0]){
case 0x08: /* read */
case 0x0A: /* write */
cmdp = cmd10;
memset(cmdp, 0, sizeof(cmd10));
cmdp[0] = r->cmd[0]|0x20;
cmdp[1] = r->cmd[1] & 0xE0;
cmdp[5] = r->cmd[3];
cmdp[4] = r->cmd[2];
cmdp[3] = r->cmd[1] & 0x0F;
cmdp[8] = r->cmd[4];
clen = sizeof(cmd10);
break;
default:
cmdp = r->cmd;
clen = r->clen;
break;
}
qlock(drive);
retry:
drive->write = r->write;
drive->data = r->data;
drive->dlen = r->dlen;
drive->status = 0;
drive->error = 0;
if(drive->pkt)
status = atapktio(drive, cmdp, clen);
else
status = atagenio(drive, cmdp, clen);
if(status == SDretry){
if(DbgDEBUG)
print("%s: retry: dma %8.8uX rwm %4.4uX\n",
unit->name, drive->dmactl, drive->rwmctl);
goto retry;
}
if(status == SDok){
atasetsense(drive, SDok, 0, 0, 0);
if(drive->data){
p = r->data;
r->rlen = drive->data - p;
}
else
r->rlen = 0;
}
else if(status == SDcheck && !(r->flags & SDnosense)){
drive->write = 0;
memset(cmd10, 0, sizeof(cmd10));
cmd10[0] = 0x03;
cmd10[1] = r->lun<<5;
cmd10[4] = sizeof(r->sense)-1;
drive->data = r->sense;
drive->dlen = sizeof(r->sense)-1;
drive->status = 0;
drive->error = 0;
if(drive->pkt)
reqstatus = atapktio(drive, cmd10, 6);
else
reqstatus = atagenio(drive, cmd10, 6);
if(reqstatus == SDok){
r->flags |= SDvalidsense;
atasetsense(drive, SDok, 0, 0, 0);
}
}
qunlock(drive);
r->status = status;
if(status != SDok)
return status;
/*
* Fix up any results.
* Many ATAPI CD-ROMs ignore the LUN field completely and
* return valid INQUIRY data. Patch the response to indicate
* 'logical unit not supported' if the LUN is non-zero.
*/
switch(cmdp[0]){
case 0x12: /* inquiry */
if((p = r->data) == nil)
break;
if((cmdp[1]>>5) && (!drive->pkt || (p[0] & 0x1F) == 0x05))
p[0] = 0x7F;
/*FALLTHROUGH*/
default:
break;
}
return SDok;
}
static void
atainterrupt(Ureg*, void* arg)
{
Ctlr *ctlr;
Drive *drive;
int cmdport, len, status;
ctlr = arg;
ilock(ctlr);
if(inb(ctlr->ctlport+As) & Bsy){
iunlock(ctlr);
if(DEBUG & DbgDEBUG)
print("IBsy+");
return;
}
cmdport = ctlr->cmdport;
status = inb(cmdport+Status);
if((drive = ctlr->curdrive) == nil){
iunlock(ctlr);
if((DEBUG & DbgDEBUG) && ctlr->command != Cedd)
print("Inil%2.2uX/%2.2uX+", ctlr->command, status);
return;
}
if(status & Err)
drive->error = inb(cmdport+Error);
else switch(drive->command){
default:
drive->error = Abrt;
break;
case Crs:
case Crsm:
if(!(status & Drq)){
drive->error = Abrt;
break;
}
len = drive->block;
if(drive->data+len > drive->limit)
len = drive->limit-drive->data;
inss(cmdport+Data, drive->data, len/2);
drive->data += len;
if(drive->data >= drive->limit)
ctlr->done = 1;
break;
case Cws:
case Cwsm:
len = drive->block;
if(drive->data+len > drive->limit)
len = drive->limit-drive->data;
drive->data += len;
if(drive->data >= drive->limit){
ctlr->done = 1;
break;
}
if(!(status & Drq)){
drive->error = Abrt;
break;
}
len = drive->block;
if(drive->data+len > drive->limit)
len = drive->limit-drive->data;
outss(cmdport+Data, drive->data, len/2);
break;
case Cpkt:
atapktinterrupt(drive);
break;
case Crd:
case Cwd:
atadmainterrupt(drive, drive->count*drive->secsize);
break;
case Cstandby:
ctlr->done = 1;
break;
}
iunlock(ctlr);
if(drive->error){
status |= Err;
ctlr->done = 1;
}
if(ctlr->done){
ctlr->curdrive = nil;
drive->status = status;
wakeup(ctlr);
}
}
#ifdef notdef
static SDev*
atapnp(void)
{
int cmdport;
int ctlport;
int irq;
cmdport = 0x200;
ctlport = cmdport + 0x0C;
irq = 10;
return ataprobe(cmdport, ctlport, irq);
}
#endif
static SDev*
atalegacy(int port, int irq)
{
return ataprobe(port, port+0x204, irq);
}
static int ataitype;
static int atairq;
static int
ataenable(SDev* sdev)
{
Ctlr *ctlr;
char name[KNAMELEN];
ctlr = sdev->ctlr;
if(ctlr->bmiba){
ctlr->prdt = xspanalloc(Nprd*sizeof(Prd), 4, 4*1024);
}
snprint(name, KNAMELEN, "%s (%s)", sdev->name, sdev->ifc->name);
// intrenable(ctlr->irq, atainterrupt, ctlr, ctlr->tbdf, name);
outb(ctlr->ctlport+Dc, 0);
intrenable(ataitype, atairq, atainterrupt, ctlr, name);
if(ctlr->ienable)
ctlr->ienable(ctlr);
return 1;
}
static int
atarctl(SDunit* unit, char* p, int l)
{
int n;
Ctlr *ctlr;
Drive *drive;
if((ctlr = unit->dev->ctlr) == nil || ctlr->drive[unit->subno] == nil)
return 0;
drive = ctlr->drive[unit->subno];
qlock(drive);
n = snprint(p, l, "config %4.4uX capabilities %4.4uX",
drive->info[Iconfig], drive->info[Icapabilities]);
if(drive->dma)
n += snprint(p+n, l-n, " dma %8.8uX dmactl %8.8uX",
drive->dma, drive->dmactl);
if(drive->rwm)
n += snprint(p+n, l-n, " rwm %ud rwmctl %ud",
drive->rwm, drive->rwmctl);
n += snprint(p+n, l-n, "\n");
if(unit->sectors){
n += snprint(p+n, l-n, "geometry %llud %ld",
unit->sectors, unit->secsize);
if(drive->pkt == 0)
n += snprint(p+n, l-n, " %d %d %d",
drive->c, drive->h, drive->s);
n += snprint(p+n, l-n, "\n");
}
qunlock(drive);
return n;
}
static int
atawctl(SDunit* unit, Cmdbuf* cb)
{
int period;
Ctlr *ctlr;
Drive *drive;
if((ctlr = unit->dev->ctlr) == nil || ctlr->drive[unit->subno] == nil)
return 0;
drive = ctlr->drive[unit->subno];
qlock(drive);
if(waserror()){
qunlock(drive);
nexterror();
}
/*
* Dma and rwm control is passive at the moment,
* i.e. it is assumed that the hardware is set up
* correctly already either by the BIOS or when
* the drive was initially identified.
*/
if(strcmp(cb->f[0], "dma") == 0){
if(cb->nf != 2 || drive->dma == 0)
error(Ebadctl);
if(strcmp(cb->f[1], "on") == 0)
drive->dmactl = drive->dma;
else if(strcmp(cb->f[1], "off") == 0)
drive->dmactl = 0;
else
error(Ebadctl);
}
else if(strcmp(cb->f[0], "rwm") == 0){
if(cb->nf != 2 || drive->rwm == 0)
error(Ebadctl);
if(strcmp(cb->f[1], "on") == 0)
drive->rwmctl = drive->rwm;
else if(strcmp(cb->f[1], "off") == 0)
drive->rwmctl = 0;
else
error(Ebadctl);
}
else if(strcmp(cb->f[0], "standby") == 0){
switch(cb->nf){
default:
error(Ebadctl);
case 2:
period = strtol(cb->f[1], 0, 0);
if(period && (period < 30 || period > 240*5))
error(Ebadctl);
period /= 5;
break;
}
if(atastandby(drive, period) != SDok)
error(Ebadctl);
}
else
error(Ebadctl);
qunlock(drive);
poperror();
return 0;
}
static int
scsitest(SDreq* r)
{
r->write = 0;
memset(r->cmd, 0, sizeof(r->cmd));
r->cmd[1] = r->lun<<5;
r->clen = 6;
r->data = nil;
r->dlen = 0;
r->flags = 0;
r->status = ~0;
return r->unit->dev->ifc->rio(r);
}
static int
scsirio(SDreq* r)
{
/*
* Perform an I/O request, returning
* -1 failure
* 0 ok
* 1 no medium present
* 2 retry
* The contents of r may be altered so the
* caller should re-initialise if necesary.
*/
r->status = ~0;
switch(r->unit->dev->ifc->rio(r)){
default:
break;
case SDcheck:
if(!(r->flags & SDvalidsense))
break;
switch(r->sense[2] & 0x0F){
case 0x00: /* no sense */
case 0x01: /* recovered error */
return 2;
case 0x06: /* check condition */
/*
* 0x28 - not ready to ready transition,
* medium may have changed.
* 0x29 - power on or some type of reset.
*/
if(r->sense[12] == 0x28 && r->sense[13] == 0)
return 2;
if(r->sense[12] == 0x29)
return 2;
break;
case 0x02: /* not ready */
/*
* If no medium present, bail out.
* If unit is becoming ready, rather than not
* not ready, wait a little then poke it again. */
if(r->sense[12] == 0x3A)
break;
if(r->sense[12] != 0x04 || r->sense[13] != 0x01)
break;
while(waserror())
;
tsleep(&up->sleep, return0, 0, 500);
poperror();
scsitest(r);
return 2;
default:
break;
}
break;
case SDok:
return 0;
}
return -1;
}
static int
ataverify(SDunit* unit)
{
SDreq *r;
int i, status;
uchar *inquiry;
if((r = malloc(sizeof(SDreq))) == nil)
return 0;
if((inquiry = sdmalloc(sizeof(unit->inquiry))) == nil){
free(r);
return 0;
}
r->unit = unit;
r->lun = 0; /* ??? */
memset(unit->inquiry, 0, sizeof(unit->inquiry));
r->write = 0;
r->cmd[0] = 0x12;
r->cmd[1] = r->lun<<5;
r->cmd[4] = sizeof(unit->inquiry)-1;
r->clen = 6;
r->data = inquiry;
r->dlen = sizeof(unit->inquiry)-1;
r->flags = 0;
r->status = ~0;
if(unit->dev->ifc->rio(r) != SDok){
free(r);
return 0;
}
memmove(unit->inquiry, inquiry, r->dlen);
free(inquiry);
SET(status);
for(i = 0; i < 3; i++){
while((status = scsitest(r)) == SDbusy)
;
if(status == SDok || status != SDcheck)
break;
if(!(r->flags & SDvalidsense))
break;
if((r->sense[2] & 0x0F) != 0x02)
continue;
/*
* Unit is 'not ready'.
* If it needs an initialising command, set status
* so it will be spun-up below.
* If there's no medium, that's OK too, but don't
* try to spin it up.
*/
if(r->sense[12] == 0x04 && r->sense[13] == 0x02){
status = SDok;
break;
}
if(r->sense[12] == 0x3A)
break;
}
if(status == SDok){
/*
* Try to ensure a direct-access device is spinning.
* Don't wait for completion, ignore the result.
*/
if((unit->inquiry[0] & 0x1F) == 0){
memset(r->cmd, 0, sizeof(r->cmd));
r->write = 0;
r->cmd[0] = 0x1B;
r->cmd[1] = (r->lun<<5)|0x01;
r->cmd[4] = 1;
r->clen = 6;
r->data = nil;
r->dlen = 0;
r->flags = 0;
r->status = ~0;
unit->dev->ifc->rio(r);
}
}
free(r);
if(status == SDok || status == SDcheck)
return 1;
return 0;
}
static int
ataonline(SDunit* unit)
{
SDreq *r;
uchar *p;
int ok, retries;
if((r = malloc(sizeof(SDreq))) == nil)
return 0;
if((p = sdmalloc(8)) == nil){
free(r);
return 0;
}
ok = 0;
r->unit = unit;
r->lun = 0; /* ??? */
for(retries = 0; retries < 10; retries++){
/*
* Read-capacity is mandatory for DA, WORM, CD-ROM and
* MO. It may return 'not ready' if type DA is not
* spun up, type MO or type CD-ROM are not loaded or just
* plain slow getting their act together after a reset.
*/
r->write = 0;
memset(r->cmd, 0, sizeof(r->cmd));
r->cmd[0] = 0x25;
r->cmd[1] = r->lun<<5;
r->clen = 10;
r->data = p;
r->dlen = 8;
r->flags = 0;
r->status = ~0;
switch(scsirio(r)){
default:
break;
case 0:
unit->sectors = (p[0]<<24)|(p[1]<<16)|(p[2]<<8)|p[3];
/*
* Read-capacity returns the LBA of the last sector,
* therefore the number of sectors must be incremented.
*/
unit->sectors++;
unit->secsize = (p[4]<<24)|(p[5]<<16)|(p[6]<<8)|p[7];
/*
* Some ATAPI CD readers lie about the block size.
* Since we don't read audio via this interface
* it's okay to always fudge this.
*/
if(unit->secsize == 2352)
unit->secsize = 2048;
ok = 1;
break;
case 1:
ok = 1;
break;
case 2:
continue;
}
break;
}
free(p);
free(r);
if(ok)
return ok+retries;
else
return 0;
}
static long
atabio(SDunit* unit, int lun, int write, void* data, long nb, uvlong bno)
{
SDreq *r;
long rlen;
if((r = malloc(sizeof(SDreq))) == nil)
error(Enomem);
r->unit = unit;
r->lun = lun;
again:
r->write = write;
if(write == 0)
r->cmd[0] = 0x28;
else
r->cmd[0] = 0x2A;
r->cmd[1] = (lun<<5);
r->cmd[2] = bno>>24;
r->cmd[3] = bno>>16;
r->cmd[4] = bno>>8;
r->cmd[5] = bno;
r->cmd[6] = 0;
r->cmd[7] = nb>>8;
r->cmd[8] = nb;
r->cmd[9] = 0;
r->clen = 10;
r->data = data;
r->dlen = nb*unit->secsize;
r->flags = 0;
r->status = ~0;
switch(scsirio(r)){
default:
rlen = -1;
break;
case 0:
rlen = r->rlen;
break;
case 2:
rlen = -1;
if(!(r->flags & SDvalidsense))
break;
switch(r->sense[2] & 0x0F){
default:
break;
case 0x06: /* check condition */
/*
* Check for a removeable media change.
* If so, mark it by zapping the geometry info
* to force an online request.
*/
if(r->sense[12] != 0x28 || r->sense[13] != 0)
break;
if(unit->inquiry[1] & 0x80)
unit->sectors = 0;
break;
case 0x02: /* not ready */
/*
* If unit is becoming ready,
* rather than not not ready, try again.
*/
if(r->sense[12] == 0x04 && r->sense[13] == 0x01)
goto again;
break;
}
break;
}
free(r);
return rlen;
}
struct Try {
int p;
int c;
} tries[] = {
{ 0, 0x0c },
{ 0, 0 },
};
static SDev*
ataprobew(DevConf *cf)
{
int cmdport;
int ctlport;
int irq;
SDev* rc;
struct Try *try;
rc = nil;
for (try = &tries[0]; try->p != 0 || try->c != 0; try++){
ataitype = cf->itype;
atairq = cf->intnum;
cmdport = cf->ports[0].port + try->p;
ctlport = cmdport + try->c;
irq = cf->intnum;
rc = ataprobe(cmdport, ctlport, irq);
if (rc)
break;
}
return rc;
}
static void
ataclear(SDev *sdev)
{
Ctlr* ctlr;
ctlr = sdev->ctlr;
if (ctlr->drive[0])
free(ctlr->drive[0]);
if (ctlr->drive[1])
free(ctlr->drive[1]);
if (sdev->name)
free(sdev->name);
if (sdev->unitflg)
free(sdev->unitflg);
if (sdev->unit)
free(sdev->unit);
free(ctlr);
free(sdev);
}
static char *
atastat(SDev *sdev, char *p, char *e)
{
Ctlr *ctlr = sdev->ctlr;
return seprint(p, e, "%s ata port %X ctl %X irq %d\n",
sdev->name, ctlr->cmdport, ctlr->ctlport, ctlr->irq);
}
SDifc sdataifc = {
"ata", /* name */
nil, /* pnp */
atalegacy, /* legacy */
ataenable, /* enable */
nil, /* disable */
ataverify, /* verify */
ataonline, /* online */
atario, /* rio */
atarctl, /* rctl */
atawctl, /* wctl */
atabio, /* bio */
ataprobew, /* probew */
ataclear, /* clear */
atastat, /* stat */
};