ref: fcb6d6ec65fb82c3b6b936dd148df72b9955994b
dir: /sys/src/9/pc/sdide.c/
#include "u.h"
#include "../port/lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "io.h"
#include "../port/pci.h"
#include "ureg.h"
#include "../port/error.h"
#include "../port/sd.h"
#include <fis.h>
#define HOWMANY(x, y) (((x)+((y)-1))/(y))
#define ROUNDUP(x, y) (HOWMANY((x), (y))*(y))
#define uprint(...) snprint(up->genbuf, sizeof up->genbuf, __VA_ARGS__);
#pragma varargck argpos atadebug 3
extern SDifc sdideifc;
enum {
DbgCONFIG = 0x0001, /* detected drive config info */
DbgIDENTIFY = 0x0002, /* detected drive identify info */
DbgSTATE = 0x0004, /* dump state on panic */
DbgPROBE = 0x0008, /* trace device probing */
DbgDEBUG = 0x0080, /* the current problem... */
DbgINL = 0x0100, /* That Inil20+ message we hate */
Dbg48BIT = 0x0200, /* 48-bit LBA */
DbgBsy = 0x0400, /* interrupt but Bsy (shared IRQ) */
DbgAtazz = 0x0800, /* debug raw ata io */
};
#define DEBUG (DbgDEBUG|DbgSTATE)
enum { /* I/O ports */
Data = 0,
Error = 1, /* (read) */
Features = 1, /* (write) */
Count = 2, /* sector count<7-0>, sector count<15-8> */
Ir = 2, /* interrupt reason (PACKET) */
Sector = 3, /* sector number */
Lbalo = 3, /* LBA<7-0>, LBA<31-24> */
Cyllo = 4, /* cylinder low */
Bytelo = 4, /* byte count low (PACKET) */
Lbamid = 4, /* LBA<15-8>, LBA<39-32> */
Cylhi = 5, /* cylinder high */
Bytehi = 5, /* byte count hi (PACKET) */
Lbahi = 5, /* LBA<23-16>, LBA<47-40> */
Dh = 6, /* Device/Head, LBA<27-24> */
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 */
Devs = Dev0 | Dev1,
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 */
Crs = 0x20, /* Read Sectors */
Crs48 = 0x24, /* Read Sectors Ext */
Crd48 = 0x25, /* Read w/ DMA Ext */
Crsm48 = 0x29, /* Read Multiple Ext */
Cws = 0x30, /* Write Sectors */
Cws48 = 0x34, /* Write Sectors Ext */
Cwd48 = 0x35, /* Write w/ DMA Ext */
Cwsm48 = 0x39, /* Write Multiple Ext */
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 */
Crd = 0xC8, /* Read DMA */
Cwd = 0xCA, /* Write DMA */
Cid = 0xEC, /* Identify Device */
};
enum { /* Device Control */
Nien = 0x02, /* (not) Interrupt Enable */
Srst = 0x04, /* Software Reset */
Hob = 0x80, /* High Order Bit [sic] */
};
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, /* End of Transfer */
};
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 */
Ilba = 60, /* 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 */
Ilba48 = 100, /* 48-bit LBA size (64 bits in 100-103) */
Irmsn = 127, /* removable status notification */
Isecstat = 128, /* security status */
Icfapwr = 160, /* CFA power mode */
Imediaserial = 176, /* current media serial number */
Icksum = 255, /* checksum */
};
enum { /* bit masks for config identify info */
Mpktsz = 0x0003, /* packet command size */
Mincomplete = 0x0004, /* incomplete information */
Mdrq = 0x0060, /* DRQ type */
Mrmdev = 0x0080, /* device is removable */
Mtype = 0x1F00, /* device type */
Mproto = 0x8000, /* command protocol */
};
enum { /* bit masks for capabilities identify info */
Mdma = 0x0100, /* DMA supported */
Mlba = 0x0200, /* LBA supported */
Mnoiordy = 0x0400, /* IORDY may be disabled */
Miordy = 0x0800, /* IORDY supported */
Msoftrst = 0x1000, /* needs soft reset when Bsy */
Mqueueing = 0x4000, /* queueing overlap supported */
Midma = 0x8000, /* interleaved DMA supported */
};
enum { /* bit masks for supported/enabled features */
Msmart = 0x0001,
Msecurity = 0x0002,
Mrmmedia = 0x0004,
Mpwrmgmt = 0x0008,
Mpkt = 0x0010,
Mwcache = 0x0020,
Mlookahead = 0x0040,
Mrelirq = 0x0080,
Msvcirq = 0x0100,
Mreset = 0x0200,
Mprotected = 0x0400,
Mwbuf = 0x1000,
Mrbuf = 0x2000,
Mnop = 0x4000,
Mmicrocode = 0x0001,
Mqueued = 0x0002,
Mcfa = 0x0004,
Mapm = 0x0008,
Mnotify = 0x0010,
Mspinup = 0x0040,
Mmaxsec = 0x0100,
Mautoacoustic = 0x0200,
Maddr48 = 0x0400,
Mdevconfov = 0x0800,
Mflush = 0x1000,
Mflush48 = 0x2000,
Msmarterror = 0x0001,
Msmartselftest = 0x0002,
Mmserial = 0x0004,
Mmpassthru = 0x0008,
Mlogging = 0x0020,
};
typedef struct Ctlr Ctlr;
typedef struct Drive Drive;
typedef struct Prd { /* Physical Region Descriptor */
ulong pa; /* Physical Base Address */
int count;
} Prd;
enum {
BMspan = 32*1024, /* must be power of 2 <= 64*1024 */
Nprd = SDmaxio/BMspan+2,
};
typedef struct Ctlr {
int cmdport;
int ctlport;
int irq;
int tbdf;
int bmiba; /* bus master interface base address */
int maxio; /* sector count transfer maximum */
int span; /* don't span this boundary with dma */
int maxdma; /* don't attempt dma transfers bigger than this */
Pcidev* pcidev;
void (*ienable)(Ctlr*);
void (*idisable)(Ctlr*);
SDev* sdev;
Drive* drive[2];
Prd* prdt; /* physical region descriptor table */
void (*irqack)(Ctlr*);
QLock; /* current command */
Drive* curdrive;
int command; /* last command issued (debugging) */
Rendez;
int done;
uint nrq;
uint nildrive;
uint bsy;
Lock; /* register access */
} Ctlr;
typedef struct Drive {
Ctlr* ctlr;
SDunit *unit;
int dev;
ushort info[256];
Sfis;
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 */
uvlong sectors;
uint secsize;
char serial[20+1];
char firmware[8+1];
char model[40+1];
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;
int flags; /* internal flags */
uint missirq;
uint spurloop;
uint irq;
uint bsy;
} Drive;
enum { /* internal flags */
Lba48always = 0x2, /* ... */
Online = 0x4, /* drive onlined */
};
static void
pc87415ienable(Ctlr* ctlr)
{
Pcidev *p;
int x;
p = ctlr->pcidev;
if(p == nil)
return;
x = pcicfgr32(p, 0x40);
if(ctlr->cmdport == (p->mem[0].bar & ~3))
x &= ~0x00000100;
else
x &= ~0x00000200;
pcicfgw32(p, 0x40, x);
}
static void
atadumpstate(Drive* drive, SDreq *r, uvlong lba, int count)
{
Prd *prd;
Pcidev *p;
Ctlr *ctlr;
int i, bmiba, ccnt;
uvlong clba;
if(!(DEBUG & DbgSTATE))
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(r->clen == -16)
clba = fisrw(nil, r->cmd, &ccnt);
else
sdfakescsirw(r, &clba, &ccnt, 0);
print("lba %llud -> %llud, count %d -> %d (%d)\n",
clba, lba, ccnt, 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
|| drive->command == (Pdma|Pin) || drive->command == (Pdma|Pout)){
bmiba = ctlr->bmiba;
prd = ctlr->prdt;
print("bmicx %2.2uX bmisx %2.2uX prdt %8.8p\n",
inb(bmiba+Bmicx), inb(bmiba+Bmisx), prd);
while(prd){
print("pa 0x%8.8luX count %8.8uX\n",
prd->pa, prd->count);
if(prd->count & PrdEOT)
break;
prd++;
}
}
if(ctlr->pcidev && ctlr->pcidev->vid == 0x8086){
p = ctlr->pcidev;
print("0x40: %4.4uX 0x42: %4.4uX ",
pcicfgr16(p, 0x40), pcicfgr16(p, 0x42));
print("0x48: %2.2uX\n", pcicfgr8(p, 0x48));
print("0x4A: %4.4uX\n", pcicfgr16(p, 0x4A));
}
}
static void
atadebug(int cmdport, int ctlport, char* fmt, ...)
{
char *p, *e, buf[PRINTSIZE];
int i;
va_list arg;
if(!(DEBUG & DbgPROBE)){
USED(cmdport);
USED(ctlport);
USED(fmt);
return;
}
p = buf;
e = buf + sizeof buf;
va_start(arg, fmt);
p = vseprint(p, e, fmt, arg);
va_end(arg);
if(cmdport){
if(p > buf && p[-1] == '\n')
p--;
p = seprint(p, e, " ataregs 0x%uX:", cmdport);
for(i = Features; i < Command; i++)
p = seprint(p, e, " 0x%2.2uX", inb(cmdport+i));
if(ctlport)
p = seprint(p, e, " 0x%2.2uX", inb(ctlport+As));
p = seprint(p, e, "\n");
}
putstrn(buf, p - buf);
}
static int
ataready(int cmdport, int ctlport, int dev, int reset, int ready, int m)
{
int as, m0;
atadebug(cmdport, ctlport, "ataready: dev %ux:%ux reset %ux ready %ux",
cmdport, dev, reset, ready);
m0 = m;
do{
/*
* 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){
/* nothing to do */
}
else if(dev){
outb(cmdport+Dh, dev);
dev = 0;
}
else if(ready == 0 || (as & ready)){
atadebug(0, 0, "ataready: %d:%d %#.2ux\n", m, m0, as);
return as;
}
microdelay(1);
}while(m-- > 0);
atadebug(0, 0, "ataready: timeout %d %#.2ux\n", m0, as);
return -1;
}
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(1);
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(SDunit *unit, Drive* drive)
{
char buf[32], *s;
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] & 0x7F7F;
drive->dma = (dma>>8) & dma;
if(drive->dma)
drive->dma |= 'U'<<16;
}
if(unit != nil){
snprint(buf, sizeof buf, "*%sdma", unit->name);
s = getconf(buf);
if((s && !strcmp(s, "on")) || (!s && !getconf("*nodma")))
drive->dmactl = drive->dma;
}
return dma;
}
static int
ataidentify(Ctlr*, 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;
}
dev &= ~Lba;
as = ataready(cmdport, ctlport, dev, Bsy|Drq, drdy, 103*1000);
if(as < 0)
return -1;
outb(cmdport+Command, command);
microdelay(1);
as = ataready(cmdport, ctlport, 0, Bsy, Drq|Err, 400*1000);
if(as < 0 || (as & Err))
return as;
memset(info, 0, 512);
inss(cmdport+Data, info, 256);
inb(cmdport+Status);
return 0;
}
static Drive*
atadrive(SDunit *unit, Drive *drive, int cmdport, int ctlport, int dev)
{
int as, pkt, rlo, rhi;
uchar buf[512], oserial[21];
uvlong osectors;
Ctlr *ctlr;
if(DEBUG & DbgIDENTIFY)
print("identify: port %ux dev %.2ux\n", cmdport, dev & ~Lba);
atadebug(0, 0, "identify: port 0x%uX dev 0x%2.2uX\n", cmdport, dev);
if(drive != nil){
osectors = drive->sectors;
memmove(oserial, drive->serial, sizeof drive->serial);
ctlr = drive->ctlr;
}else{
osectors = 0;
memset(oserial, 0, sizeof drive->serial);
ctlr = nil;
/* detect if theres a drive present */
outb(cmdport+Dh, dev & ~Lba);
microdelay(1);
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))
return nil;
}
pkt = 1;
retry:
as = ataidentify(ctlr, cmdport, ctlport, dev, pkt, buf);
if(as < 0)
return nil;
if(as & Err){
if(pkt == 0)
return nil;
pkt = 0;
goto retry;
}
if(drive == 0){
if((drive = malloc(sizeof(Drive))) == nil)
return nil;
drive->serial[0] = ' ';
drive->dev = dev;
}
memmove(drive->info, buf, sizeof(drive->info));
setfissig(drive, pkt ? 0xeb140000 : 0x0101);
drive->sectors = idfeat(drive, drive->info);
drive->secsize = idss(drive, drive->info);
idmove(drive->serial, drive->info+10, 20);
idmove(drive->firmware, drive->info+23, 8);
idmove(drive->model, drive->info+27, 40);
if(unit != nil){
memset(unit->inquiry, 0, sizeof unit->inquiry);
unit->inquiry[2] = 2;
unit->inquiry[3] = 2;
unit->inquiry[4] = sizeof unit->inquiry - 4;
memmove(unit->inquiry+8, drive->model, 40);
}
if(pkt){
drive->pkt = 12;
if(drive->feat & Datapi16)
drive->pkt = 16;
}else{
drive->pkt = 0;
if(drive->feat & Dlba)
drive->dev |= Lba;
atarwmmode(drive, cmdport, ctlport, dev);
}
atadmamode(unit, drive);
if(osectors != 0 && memcmp(oserial, drive->serial, sizeof oserial) != 0)
if(unit)
unit->sectors = 0;
drive->unit = unit;
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", drive->dma, drive->rwm);
if(drive->feat&Dllba)
print("\tLLBA sectors %llud", drive->sectors);
print("\n");
}
return drive;
}
static void
atasrst(int ctlport)
{
int dc0;
/*
* 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.
*/
dc0 = inb(ctlport+Dc);
microdelay(5);
outb(ctlport+Dc, Srst|dc0);
microdelay(5);
outb(ctlport+Dc, dc0);
microdelay(2*1000);
}
static SDev*
ataprobe(int cmdport, int ctlport, int irq, int map)
{
static int nonlegacy = 'C';
Ctlr* ctlr;
SDev *sdev;
if(ioalloc(cmdport, 8, 0, "atacmd") < 0) {
print("ataprobe: Cannot allocate %X\n", cmdport);
return nil;
}
if(ioalloc(ctlport+As, 1, 0, "atactl") < 0){
print("ataprobe: Cannot allocate %X\n", ctlport + As);
iofree(cmdport);
return nil;
}
if((ctlr = malloc(sizeof(Ctlr))) == nil)
goto release;
if((sdev = malloc(sizeof(SDev))) == nil){
free(ctlr);
goto release;
}
if((map & 2) && (ctlr->drive[1] = atadrive(0, 0, cmdport, ctlport, Dev1)))
ctlr->drive[1]->ctlr = ctlr;
if((map & 1) && (ctlr->drive[0] = atadrive(0, 0, cmdport, ctlport, Dev0)))
ctlr->drive[0]->ctlr = ctlr;
if(ctlr->drive[0] == nil && ctlr->drive[1] == nil){
free(ctlr->drive[0]);
free(ctlr->drive[1]);
free(ctlr);
free(sdev);
goto release;
}
ctlr->cmdport = cmdport;
ctlr->ctlport = ctlport;
ctlr->irq = irq;
ctlr->tbdf = BUSUNKNOWN;
ctlr->command = Cnop; /* debugging */
switch(cmdport){
default:
sdev->idno = nonlegacy;
break;
case 0x1F0:
sdev->idno = 'C';
nonlegacy = 'E';
break;
case 0x170:
sdev->idno = 'D';
nonlegacy = 'E';
break;
}
sdev->ifc = &sdideifc;
sdev->ctlr = ctlr;
sdev->nunit = 2;
ctlr->sdev = sdev;
return sdev;
release:
iofree(cmdport);
iofree(ctlport+As);
return nil;
}
static void
ataclear(SDev *sdev)
{
Ctlr* ctlr;
ctlr = sdev->ctlr;
iofree(ctlr->cmdport);
iofree(ctlr->ctlport + As);
if (ctlr->drive[0])
free(ctlr->drive[0]);
if (ctlr->drive[1])
free(ctlr->drive[1]);
free(ctlr);
}
static char *
atastat(SDev *sdev, char *p, char *e)
{
Ctlr *ctlr;
ctlr = sdev->ctlr;
// return seprint(p, e, "%s ata port %X ctl %X irq %d %T\n",
// sdev->name, ctlr->cmdport, ctlr->ctlport, ctlr->irq, ctlr->tbdf);
return seprint(p, e, "%s ata port %X ctl %X irq %d\n",
sdev->name, ctlr->cmdport, ctlr->ctlport, ctlr->irq);
}
static SDev*
ataprobew(DevConf *cf)
{
char *p;
ISAConf isa;
if (cf->nports != 2)
error(Ebadarg);
memset(&isa, 0, sizeof isa);
isa.port = cf->ports[0].port;
isa.irq = cf->intnum;
if((p=strchr(cf->type, '/')) == nil || pcmspecial(p+1, &isa) < 0)
error("cannot find controller");
return ataprobe(cf->ports[0].port, cf->ports[1].port, cf->intnum, 3);
}
static void atainterrupt(Ureg*, void*);
static int
iowait(Drive *drive, int ms, int interrupt)
{
int msec, step;
Ctlr *ctlr;
step = 1000;
if(drive->missirq > 10)
step = 50;
ctlr = drive->ctlr;
for(msec = 0; msec < ms; msec += step){
while(waserror())
if(interrupt)
return -1;
tsleep(ctlr, atadone, ctlr, step);
poperror();
if(ctlr->done)
break;
atainterrupt(nil, ctlr);
if(ctlr->done){
if(drive->missirq++ < 3)
print("ide: caught missed irq\n");
break;
}else
drive->spurloop++;
}
return ctlr->done;
}
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 use it otherwise
* must try a software reset.
*/
if(dolock)
ilock(drive->ctlr);
if(drive->feat & Dnop)
atanop(drive, 0);
else{
atasrst(drive->ctlr->ctlport);
drive->error |= Abrt;
}
if(dolock)
iunlock(drive->ctlr);
}
static int
atadmasetup(Drive* drive, int len)
{
Prd *prd;
Ctlr *ctlr;
uintptr pa, span;
int bmiba, bmisx, count, i;
ctlr = drive->ctlr;
pa = PCIWADDR(drive->data);
if(pa & 0x03)
return -1;
if(ctlr->maxdma && len > ctlr->maxdma)
return -1;
/*
* Sometimes drives identify themselves as being DMA capable
* although they are not on a busmastering controller.
*/
prd = ctlr->prdt;
if(prd == nil){
drive->dmactl = 0;
print("disabling dma: not on a busmastering controller\n");
return -1;
}
for(i = 0; len && i < Nprd; i++){
prd->pa = pa;
span = ROUNDUP(pa, ctlr->span);
if(span == pa)
span += ctlr->span;
count = span - pa;
if(count >= len){
prd->count = PrdEOT|len;
break;
}
prd->count = count;
len -= count;
pa += count;
prd++;
}
if(i == Nprd)
return -1;
bmiba = ctlr->bmiba;
outl(bmiba+Bmidtpx, PCIWADDR(ctlr->prdt));
if(drive->write)
outb(bmiba+Bmicx, 0);
else
outb(bmiba+Bmicx, Rwcon);
bmisx = inb(bmiba+Bmisx);
outb(bmiba+Bmisx, bmisx|Ideints|Idedmae);
return 0;
}
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:
if(drive->pktdma)
goto Pktdma;
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:
if(drive->pktdma)
goto Pktdma;
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){
Pktdma:
atadmainterrupt(drive, drive->dlen);
} else
ctlr->done = 1;
break;
}
}
static int
atapktio0(Drive *drive, SDreq *r)
{
uchar *cmd;
int as, len, cmdport, ctlport, rv;
Ctlr *ctlr;
rv = SDok;
cmd = r->cmd;
drive->command = Cpkt;
memmove(drive->pktcmd, cmd, r->clen);
memset(drive->pktcmd+r->clen, 0, drive->pkt-r->clen);
drive->limit = drive->data+drive->dlen;
ctlr = drive->ctlr;
cmdport = ctlr->cmdport;
ctlport = ctlr->ctlport;
as = ataready(cmdport, ctlport, drive->dev, Bsy|Drq, 0, 107*1000);
/* used to test as&Chk as failure too, but some CD readers use that for media change */
if(as < 0)
return SDnostatus;
ilock(ctlr);
if(drive->dlen && drive->dmactl && !atadmasetup(drive, drive->dlen))
drive->pktdma = Dma;
else
drive->pktdma = 0;
len = drive->secsize > 0 ? 16*drive->secsize : 0x8000;
outb(cmdport+Features, drive->pktdma);
outb(cmdport+Count, 0);
outb(cmdport+Sector, 0);
outb(cmdport+Bytelo, len);
outb(cmdport+Bytehi, len>>8);
outb(cmdport+Dh, drive->dev);
ctlr->done = 0;
ctlr->curdrive = drive;
ctlr->command = Cpkt; /* debugging */
outb(cmdport+Command, Cpkt);
microdelay(1);
as = ataready(cmdport, ctlport, 0, Bsy, Drq|Chk, 400*1000);
if(as < 0 || (as & (Bsy|Chk))){
drive->status = as<0 ? 0 : as;
ctlr->curdrive = nil;
ctlr->done = 1;
rv = SDtimeout;
}else
atapktinterrupt(drive);
if(drive->pktdma)
atadmastart(ctlr, drive->write);
iunlock(ctlr);
while(iowait(drive, 30*1000, 1) == 0)
;
ilock(ctlr);
if(!ctlr->done){
rv = SDcheck;
ataabort(drive, 0);
}
if(drive->error){
if(drive->pktdma)
atadmastop(ctlr);
drive->status |= Chk;
ctlr->curdrive = nil;
}
iunlock(ctlr);
if(rv != SDcheck && drive->status & Chk){
rv = SDcheck;
if(drive->pktdma){
print("atapktio: disabling dma\n");
drive->dmactl = 0;
}
}
return rv;
}
static int
atapktio(Drive* drive, SDreq *r)
{
int n;
Ctlr *ctlr;
ctlr = drive->ctlr;
qlock(ctlr);
n = atapktio0(drive, r);
qunlock(ctlr);
return n;
}
static uchar cmd48[256] = {
[Crs] Crs48,
[Crd] Crd48,
[Crsm] Crsm48,
[Cws] Cws48,
[Cwd] Cwd48,
[Cwsm] Cwsm48,
};
enum{
Last28 = (1<<28) - 1,
};
static int
atageniostart(Drive* drive, uvlong lba)
{
Ctlr *ctlr;
uchar cmd;
int as, c, cmdport, ctlport, h, len, s, use48;
use48 = 0;
if((drive->flags&Lba48always) || (lba+drive->count) > Last28 || drive->count > 256){
if((drive->feat & Dllba) == 0)
return -1;
use48 = 1;
c = h = s = 0;
}else if(drive->dev & Lba){
c = (lba>>8) & 0xFFFF;
h = (lba>>24) & 0x0F;
s = lba & 0xFF;
}else{
if (drive->s == 0 || drive->h == 0){
print("sdide: chs address botch");
return -1;
}
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, Drdy, 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;
cmd = drive->command;
if(use48){
outb(cmdport+Count, drive->count>>8);
outb(cmdport+Count, drive->count);
outb(cmdport+Lbalo, lba>>24);
outb(cmdport+Lbalo, lba);
outb(cmdport+Lbamid, lba>>32);
outb(cmdport+Lbamid, lba>>8);
outb(cmdport+Lbahi, lba>>40);
outb(cmdport+Lbahi, lba>>16);
outb(cmdport+Dh, drive->dev|Lba);
cmd = cmd48[cmd];
if(DEBUG & Dbg48BIT)
print("using 48-bit commands\n");
}else{
outb(cmdport+Count, drive->count);
outb(cmdport+Sector, s);
outb(cmdport+Cyllo, c);
outb(cmdport+Cylhi, c>>8);
outb(cmdport+Dh, drive->dev|h);
}
ctlr->done = 0;
ctlr->curdrive = drive;
ctlr->command = drive->command; /* debugging */
outb(cmdport+Command, cmd);
switch(drive->command){
case Cws:
case Cwsm:
microdelay(1);
as = ataready(cmdport, ctlport, 0, Bsy, Drq|Err, 400*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, SDreq *r, uvlong lba, int count)
{
char *s;
int rv, count0, rw;
uvlong lba0;
if(drive->dmactl){
drive->dmactl = 0;
s = "disabling dma";
rv = SDretry;
}else if(drive->rwmctl){
drive->rwmctl = 0;
s = "disabling rwm";
rv = SDretry;
}else{
s = "nondma";
rv = sdsetsense(r, SDcheck, 4, 8, drive->error);
}
sdfakescsirw(r, &lba0, &count0, &rw);
print("atagenioretry: %s %c:%llud:%d @%llud:%d\n",
s, "rw"[rw], lba0, count0, lba, count);
return rv;
}
static int
atagenio(Drive* drive, SDreq *r)
{
Ctlr *ctlr;
uvlong lba;
int i, rw, count, maxio;
if((i = sdfakescsi(r)) != SDnostatus)
return i;
if((i = sdfakescsirw(r, &lba, &count, &rw)) != SDnostatus)
return i;
ctlr = drive->ctlr;
if(drive->data == nil)
return SDok;
if(drive->dlen < count*drive->secsize)
count = drive->dlen/drive->secsize;
qlock(ctlr);
if(ctlr->maxio)
maxio = ctlr->maxio;
else if(drive->feat & Dllba)
maxio = 65536;
else
maxio = 256;
while(count){
if(count > maxio)
drive->count = maxio;
else
drive->count = count;
if(atageniostart(drive, lba)){
ilock(ctlr);
atanop(drive, 0);
iunlock(ctlr);
qunlock(ctlr);
return atagenioretry(drive, r, lba, count);
}
iowait(drive, 30*1000, 0);
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, r, lba, count);
ataabort(drive, 1);
qunlock(ctlr);
return atagenioretry(drive, r, lba, count);
}
if(drive->status & Err){
qunlock(ctlr);
print("atagenio: %llud:%d\n", lba, drive->count);
return sdsetsense(r, SDcheck, 4, 8, drive->error);
}
count -= drive->count;
lba += drive->count;
}
qunlock(ctlr);
return SDok;
}
static int
atario(SDreq* r)
{
uchar *p;
int status;
Ctlr *ctlr;
Drive *drive;
SDunit *unit;
unit = r->unit;
if((ctlr = unit->dev->ctlr) == nil || ctlr->drive[unit->subno] == nil)
return r->status = SDtimeout;
drive = ctlr->drive[unit->subno];
qlock(drive);
for(;;){
drive->write = r->write;
drive->data = r->data;
drive->dlen = r->dlen;
drive->status = 0;
drive->error = 0;
if(drive->pkt)
status = atapktio(drive, r);
else
status = atagenio(drive, r);
if(status != SDretry)
break;
if(DbgDEBUG)
print("%s: retry: dma %8.8uX rwm %4.4uX\n",
unit->name, drive->dmactl, drive->rwmctl);
}
if(status == SDok && r->rlen == 0 && (r->flags & SDvalidsense) == 0){
sdsetsense(r, SDok, 0, 0, 0);
if(drive->data){
p = r->data;
r->rlen = drive->data - p;
}
else
r->rlen = 0;
}
qunlock(drive);
return status;
}
/**/
static int
isdmacmd(Drive *d, SDreq *r)
{
switch(r->ataproto & Pprotom){
default:
return 0;
case Pdmq:
error("no queued support");
case Pdma:
if(!(d->dmactl || d->rwmctl))
error("dma in non dma mode\n");
return 1;
}
}
static int
atagenatastart(Drive* d, SDreq *r)
{
uchar u;
int as, cmdport, ctlport, len, pr, isdma;
Ctlr *ctlr;
isdma = isdmacmd(d, r);
ctlr = d->ctlr;
cmdport = ctlr->cmdport;
ctlport = ctlr->ctlport;
if(ataready(cmdport, ctlport, d->dev, Bsy|Drq, d->pkt ? 0 : Drdy, 101*1000) < 0)
return -1;
ilock(ctlr);
if(isdma && atadmasetup(d, d->block)){
iunlock(ctlr);
return -1;
}
if(d->feat & Dllba && (r->ataproto & P28) == 0){
outb(cmdport+Features, r->cmd[Ffeat8]);
outb(cmdport+Features, r->cmd[Ffeat]);
outb(cmdport+Count, r->cmd[Fsc8]);
outb(cmdport+Count, r->cmd[Fsc]);
outb(cmdport+Lbalo, r->cmd[Flba24]);
outb(cmdport+Lbalo, r->cmd[Flba0]);
outb(cmdport+Lbamid, r->cmd[Flba32]);
outb(cmdport+Lbamid, r->cmd[Flba8]);
outb(cmdport+Lbahi, r->cmd[Flba40]);
outb(cmdport+Lbahi, r->cmd[Flba16]);
u = r->cmd[Fdev] & ~0xb0;
outb(cmdport+Dh, d->dev|u);
}else{
outb(cmdport+Features, r->cmd[Ffeat]);
outb(cmdport+Count, r->cmd[Fsc]);
outb(cmdport+Lbalo, r->cmd[Flba0]);
outb(cmdport+Lbamid, r->cmd[Flba8]);
outb(cmdport+Lbahi, r->cmd[Flba16]);
u = r->cmd[Fdev] & ~0xb0;
outb(cmdport+Dh, d->dev|u);
}
ctlr->done = 0;
ctlr->curdrive = d;
d->command = r->ataproto & (Pprotom|Pdatam);
ctlr->command = r->cmd[Fcmd];
outb(cmdport+Command, r->cmd[Fcmd]);
pr = r->ataproto & Pprotom;
if(pr == Pnd || pr == Preset)
USED(d);
else if(!isdma){
microdelay(1);
as = ataready(cmdport, ctlport, 0, Bsy, Drq|Err, 400*1000);
if(as < 0 || (as & Err)){
iunlock(ctlr);
return -1;
}
len = d->block;
if(r->write && len > 0)
outss(cmdport+Data, d->data, len/2);
}else
atadmastart(ctlr, d->write);
iunlock(ctlr);
return 0;
}
static void
mkrfis(Drive *d, SDreq *r)
{
uchar *u;
int cmdport;
Ctlr *ctlr;
ctlr = d->ctlr;
cmdport = ctlr->cmdport;
u = r->cmd;
ilock(ctlr);
u[Ftype] = 0x34;
u[Fioport] = 0;
if((d->feat & Dllba) && (r->ataproto & P28) == 0){
u[Frerror] = inb(cmdport+Error);
u[Fsc8] = inb(cmdport+Count);
u[Fsc] = inb(cmdport+Count);
u[Flba24] = inb(cmdport+Lbalo);
u[Flba0] = inb(cmdport+Lbalo);
u[Flba32] = inb(cmdport+Lbamid);
u[Flba8] = inb(cmdport+Lbamid);
u[Flba40] = inb(cmdport+Lbahi);
u[Flba16] = inb(cmdport+Lbahi);
u[Fdev] = inb(cmdport+Dh);
u[Fstatus] = inb(cmdport+Status);
}else{
u[Frerror] = inb(cmdport+Error);
u[Fsc] = inb(cmdport+Count);
u[Flba0] = inb(cmdport+Lbalo);
u[Flba8] = inb(cmdport+Lbamid);
u[Flba16] = inb(cmdport+Lbahi);
u[Fdev] = inb(cmdport+Dh);
u[Fstatus] = inb(cmdport+Status);
}
iunlock(ctlr);
}
static int
atarstdone(Drive *d)
{
int as;
Ctlr *c;
c = d->ctlr;
as = ataready(c->cmdport, c->ctlport, 0, Bsy|Drq, 0, 5*1000);
c->done = as >= 0;
return c->done;
}
static uint
cmdss(Drive *d, SDreq *r)
{
switch(r->cmd[Fcmd]){
case Cid:
case Cidpkt:
return 512;
default:
return d->secsize;
}
}
/*
* various checks. we should be craftier and
* avoid figuring out how big stuff is supposed to be.
*/
static uint
patasizeck(Drive *d, SDreq *r)
{
uint count, maxio, secsize;
Ctlr *ctlr;
secsize = cmdss(d, r); /* BOTCH */
if(secsize == 0)
error(Eio);
count = r->dlen / secsize;
ctlr = d->ctlr;
if(ctlr->maxio)
maxio = ctlr->maxio;
else if((d->feat & Dllba) && (r->ataproto & P28) == 0)
maxio = 65536;
else
maxio = 256;
if(count > maxio){
uprint("i/o too large, lim %d", maxio);
error(up->genbuf);
}
if(r->ataproto&Ppio && count > 1)
error("invalid # of sectors");
return count;
}
static int
atapataio(Drive *d, SDreq *r)
{
int rv;
Ctlr *ctlr;
d->count = 0;
if(r->ataproto & Pdatam)
d->count = patasizeck(d, r);
d->block = r->dlen;
d->limit = d->data + r->dlen;
ctlr = d->ctlr;
qlock(ctlr);
if(waserror()){
qunlock(ctlr);
nexterror();
}
rv = atagenatastart(d, r);
poperror();
if(rv){
if(DEBUG & DbgAtazz)
print("sdide: !atageatastart\n");
ilock(ctlr);
atanop(d, 0);
iunlock(ctlr);
qunlock(ctlr);
return sdsetsense(r, SDcheck, 4, 8, d->error);
}
if((r->ataproto & Pprotom) == Preset)
atarstdone(d);
else
while(iowait(d, 30*1000, 1) == 0)
;
if(!ctlr->done){
if(DEBUG & DbgAtazz){
print("sdide: !done\n");
atadumpstate(d, r, 0, d->count);
}
ataabort(d, 1);
qunlock(ctlr);
return sdsetsense(r, SDcheck, 11, 0, 6); /* aborted; i/o process terminated */
}
mkrfis(d, r);
if(d->status & Err){
if(DEBUG & DbgAtazz)
print("sdide: status&Err\n");
qunlock(ctlr);
return sdsetsense(r, SDcheck, 4, 8, d->error);
}
qunlock(ctlr);
return SDok;
}
static int
ataataio0(Drive *d, SDreq *r)
{
int i;
if((r->ataproto & Pprotom) == Ppkt){
if(r->clen > d->pkt)
error(Eio);
qlock(d->ctlr);
i = atapktio0(d, r);
d->block = d->data - (uchar*)r->data;
mkrfis(d, r);
qunlock(d->ctlr);
return i;
}else
return atapataio(d, r);
}
/*
* hack to allow udma mode to be set or unset
* via direct ata command. it would be better
* to move the assumptions about dma mode out
* of some of the helper functions.
*/
static int
isudm(SDreq *r)
{
uchar *c;
c = r->cmd;
if(c[Fcmd] == 0xef && c[Ffeat] == 0x03){
if(c[Fsc]&0x40)
return 1;
return -1;
}
return 0;
}
static int
fisreqchk(Sfis *f, SDreq *r)
{
if((r->ataproto & Pprotom) == Ppkt)
return SDnostatus;
/*
* handle oob requests;
* restrict & sanitize commands
*/
if(r->clen != 16)
error(Eio);
if(r->cmd[0] == 0xf0){
sigtofis(f, r->cmd);
r->status = SDok;
return SDok;
}
r->cmd[0] = 0x27;
r->cmd[1] = 0x80;
r->cmd[7] |= 0xa0;
return SDnostatus;
}
static int
ataataio(SDreq *r)
{
int status, udm;
Ctlr *c;
Drive *d;
SDunit *u;
u = r->unit;
if((c = u->dev->ctlr) == nil || (d = c->drive[u->subno]) == nil){
r->status = SDtimeout;
return SDtimeout;
}
if((status = fisreqchk(d, r)) != SDnostatus)
return status;
udm = isudm(r);
qlock(d);
if(waserror()){
qunlock(d);
nexterror();
}
retry:
d->write = r->write;
d->data = r->data;
d->dlen = r->dlen;
d->status = 0;
d->error = 0;
switch(status = ataataio0(d, r)){
case SDretry:
if(DbgDEBUG)
print("%s: retry: dma %.8ux rwm %.4ux\n",
u->name, d->dmactl, d->rwmctl);
goto retry;
case SDok:
if(udm == 1)
d->dmactl = d->dma;
else if(udm == -1)
d->dmactl = 0;
sdsetsense(r, SDok, 0, 0, 0);
r->rlen = d->block;
break;
}
poperror();
qunlock(d);
r->status = status;
return status;
}
/**/
static void
ichirqack(Ctlr *ctlr)
{
int bmiba;
if(bmiba = ctlr->bmiba)
outb(bmiba+Bmisx, inb(bmiba+Bmisx));
}
static void
atainterrupt(Ureg*, void* arg)
{
Ctlr *ctlr;
Drive *drive;
int cmdport, len, status;
ctlr = arg;
ilock(ctlr);
ctlr->nrq++;
if(ctlr->curdrive)
ctlr->curdrive->irq++;
if(inb(ctlr->ctlport+As) & Bsy){
ctlr->bsy++;
if(ctlr->curdrive)
ctlr->curdrive->bsy++;
iunlock(ctlr);
if(DEBUG & DbgBsy)
print("IBsy+");
return;
}
cmdport = ctlr->cmdport;
status = inb(cmdport+Status);
if((drive = ctlr->curdrive) == nil){
ctlr->nildrive++;
if(ctlr->irqack != nil)
ctlr->irqack(ctlr);
iunlock(ctlr);
return;
}
if(status & Err)
drive->error = inb(cmdport+Error);
else switch(drive->command){
default:
drive->error = Abrt;
break;
case Crs:
case Crsm:
case Ppio|Pin:
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:
case Ppio|Pout:
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:
case Ppkt|Pin:
case Ppkt|Pout:
atapktinterrupt(drive);
break;
case Crd:
case Cwd:
case Pdma|Pin:
case Pdma|Pout:
atadmainterrupt(drive, drive->count*drive->secsize);
break;
case Pnd:
case Preset:
ctlr->done = 1;
break;
}
if(ctlr->irqack != nil)
ctlr->irqack(ctlr);
iunlock(ctlr);
if(drive->error){
status |= Err;
ctlr->done = 1;
}
if(ctlr->done){
ctlr->curdrive = nil;
drive->status = status;
wakeup(ctlr);
}
}
typedef struct Lchan Lchan;
struct Lchan {
int cmdport;
int ctlport;
int irq;
int probed;
};
static Lchan lchan[2] = {
0x1f0, 0x3f4, IrqATA0, 0,
0x170, 0x374, IrqATA1, 0,
};
static int
badccru(Pcidev *p)
{
switch(p->did<<16 | p->did){
case 0x439c<<16 | 0x1002:
case 0x438c<<16 | 0x1002:
print("%T: allowing bad ccru %.2ux for suspected ide controller\n",
p->tbdf, p->ccru);
return 1;
default:
return 0;
}
}
static SDev*
atapnp(void)
{
char *s;
int channel, map, ispc87415, maxio, pi, r, span, maxdma, tbdf;
Ctlr *ctlr;
Pcidev *p;
SDev *sdev, *head, *tail;
void (*irqack)(Ctlr*);
head = tail = nil;
for(p = nil; p = pcimatch(p, 0, 0); ){
/*
* Look for devices with the correct class and sub-class
* code and known device and vendor ID; add native-mode
* channels to the list to be probed, save info for the
* compatibility mode channels.
* Note that the legacy devices should not be considered
* PCI devices by the interrupt controller.
* For both native and legacy, save info for busmastering
* if capable.
* Promise Ultra ATA/66 (PDC20262) appears to
* 1) give a sub-class of 'other mass storage controller'
* instead of 'IDE controller', regardless of whether it's
* the only controller or not;
* 2) put 0 in the programming interface byte (probably
* as a consequence of 1) above).
* Sub-class code 0x04 is 'RAID controller', e.g. VIA VT8237.
*/
if(p->ccrb != 0x01)
continue;
if(!badccru(p))
if(p->ccru != 0x01 && p->ccru != 0x04 && p->ccru != 0x80)
continue;
pi = p->ccrp;
map = 3;
ispc87415 = 0;
maxdma = 0;
maxio = 0;
if(s = getconf("*idemaxio"))
maxio = atoi(s);
span = BMspan;
irqack = nil;
switch((p->did<<16)|p->vid){
default:
continue;
case (0x0002<<16)|0x100B: /* NS PC87415 */
/*
* Disable interrupts on both channels until
* after they are probed for drives.
* This must be called before interrupts are
* enabled because the IRQ may be shared.
*/
ispc87415 = 1;
pcicfgw32(p, 0x40, 0x00000300);
break;
case (0x1000<<16)|0x1042: /* PC-Tech RZ1000 */
/*
* Turn off prefetch. Overkill, but cheap.
*/
r = pcicfgr32(p, 0x40);
r &= ~0x2000;
pcicfgw32(p, 0x40, r);
break;
case (0x4D38<<16)|0x105A: /* Promise PDC20262 */
case (0x4D30<<16)|0x105A: /* Promise PDC202xx */
case (0x4D68<<16)|0x105A: /* Promise PDC20268 */
case (0x4D69<<16)|0x105A: /* Promise Ultra/133 TX2 */
case (0x3373<<16)|0x105A: /* Promise 20378 RAID */
case (0x3149<<16)|0x1106: /* VIA VT8237 SATA/RAID */
case (0x0415<<16)|0x1106: /* VIA VT6415 PATA IDE */
case (0x3112<<16)|0x1095: /* SiL 3112 SATA/RAID */
maxio = 15;
span = 8*1024;
/*FALLTHROUGH*/
case (0x3114<<16)|0x1095: /* SiL 3114 SATA/RAID */
case (0x0680<<16)|0x1095: /* SiI 0680/680A PATA133 ATAPI/RAID */
pi = 0x85;
break;
case (0x0004<<16)|0x1103: /* HighPoint HPT366 */
pi = 0x85;
/*
* Turn off fast interrupt prediction.
*/
if((r = pcicfgr8(p, 0x51)) & 0x80)
pcicfgw8(p, 0x51, r & ~0x80);
if((r = pcicfgr8(p, 0x55)) & 0x80)
pcicfgw8(p, 0x55, r & ~0x80);
break;
case (0x0640<<16)|0x1095: /* CMD 640B */
/*
* Bugfix code here...
*/
break;
case (0x7441<<16)|0x1022: /* AMD 768 */
/*
* Set:
* 0x41 prefetch, postwrite;
* 0x43 FIFO configuration 1/2 and 1/2;
* 0x44 status register read retry;
* 0x46 DMA read and end of sector flush.
*/
r = pcicfgr8(p, 0x41);
pcicfgw8(p, 0x41, r|0xF0);
r = pcicfgr8(p, 0x43);
pcicfgw8(p, 0x43, (r & 0x90)|0x2A);
r = pcicfgr8(p, 0x44);
pcicfgw8(p, 0x44, r|0x08);
r = pcicfgr8(p, 0x46);
pcicfgw8(p, 0x46, (r & 0x0C)|0xF0);
/*FALLTHROUGH*/
case (0x01BC<<16)|0x10DE: /* nVidia nForce1 */
case (0x0065<<16)|0x10DE: /* nVidia nForce2 */
case (0x0085<<16)|0x10DE: /* nVidia nForce2 MCP */
case (0x00E3<<16)|0x10DE: /* nVidia nForce2 250 SATA */
case (0x00D5<<16)|0x10DE: /* nVidia nForce3 */
case (0x00E5<<16)|0x10DE: /* nVidia nForce3 Pro */
case (0x00EE<<16)|0x10DE: /* nVidia nForce3 250 SATA */
case (0x0035<<16)|0x10DE: /* nVidia nForce3 MCP */
case (0x0053<<16)|0x10DE: /* nVidia nForce4 */
case (0x0054<<16)|0x10DE: /* nVidia nForce4 SATA */
case (0x0055<<16)|0x10DE: /* nVidia nForce4 SATA */
case (0x0266<<16)|0x10DE: /* nVidia nForce4 430 SATA */
case (0x0265<<16)|0x10DE: /* nVidia nForce 51 MCP */
case (0x0267<<16)|0x10DE: /* nVidia nForce 55 MCP SATA */
case (0x037f<<16)|0x10DE: /* nVidia nForce 55 MCP SATA */
case (0x03ec<<16)|0x10DE: /* nVidia nForce 61 MCP SATA */
case (0x03f6<<16)|0x10DE: /* nVidia nForce 61 MCP PATA */
case (0x0448<<16)|0x10DE: /* nVidia nForce 65 MCP SATA */
case (0x0560<<16)|0x10DE: /* nVidia nForce 69 MCP SATA */
/*
* Ditto, although it may have a different base
* address for the registers (0x50?).
*/
/*FALLTHROUGH*/
case (0x209A<<16)|0x1022: /* AMD CS5536 */
case (0x7401<<16)|0x1022: /* AMD 755 Cobra */
case (0x7409<<16)|0x1022: /* AMD 756 Viper */
case (0x7410<<16)|0x1022: /* AMD 766 Viper Plus */
case (0x7469<<16)|0x1022: /* AMD 3111 */
case (0x4376<<16)|0x1002: /* SB4xx pata */
case (0x4379<<16)|0x1002: /* SB4xx sata */
case (0x437a<<16)|0x1002: /* SB4xx sata ctlr #2 */
case (0x437c<<16)|0x1002: /* Rx6xx pata */
case (0x438c<<16)|0x1002: /* ATI SB600 PATA */
case (0x439c<<16)|0x1002: /* SB7xx pata */
break;
case (0x6101<<16)|0x11ab: /* Marvell PATA */
case (0x6121<<16)|0x11ab: /* Marvell PATA */
case (0x6123<<16)|0x11ab: /* Marvell PATA */
case (0x6145<<16)|0x11ab: /* Marvell PATA */
case (0x1b4b<<16)|0x91a0: /* Marvell PATA */
case (0x1b4b<<16)|0x91a4: /* Marvell PATA */
break;
case (0x0211<<16)|0x1166: /* ServerWorks IB6566 */
{
Pcidev *sb;
sb = pcimatch(nil, 0x1166, 0x0200);
if(sb == nil)
break;
r = pcicfgr32(sb, 0x64);
r &= ~0x2000;
pcicfgw32(sb, 0x64, r);
}
span = 32*1024;
break;
case (0x5229<<16)|0x10B9: /* ALi M1543 */
case (0x5288<<16)|0x10B9: /* ALi M5288 SATA */
/*FALLTHROUGH*/
case (0x5513<<16)|0x1039: /* SiS 962 */
case (0x0646<<16)|0x1095: /* CMD 646 */
case (0x0571<<16)|0x1106: /* VIA 82C686 */
case (0x9001<<16)|0x1106: /* VIA chipset in VIA PV530 */
case (0x0502<<16)|0x100b: /* National Semiconductor SC1100/SCx200 */
break;
case (0x2360<<16)|0x197b: /* jmicron jmb360 */
case (0x2361<<16)|0x197b: /* jmicron jmb361 */
case (0x2363<<16)|0x197b: /* jmicron jmb363 */
case (0x2365<<16)|0x197b: /* jmicron jmb365 */
case (0x2366<<16)|0x197b: /* jmicron jmb366 */
case (0x2368<<16)|0x197b: /* jmicron jmb368 */
break;
case (0x7010<<16)|0x8086: /* 82371SB (PIIX3) */
case (0x1230<<16)|0x8086: /* 82371FB (PIIX) */
case (0x7111<<16)|0x8086: /* 82371[AE]B (PIIX4[E]) */
maxdma = 0x20000;
break;
case (0x1c00<<16)|0x8086: /* SERIES6 SATA */
case (0x1c01<<16)|0x8086: /* SERIES6 SATA */
case (0x1c08<<16)|0x8086: /* SERIES6 SATA */
case (0x1c09<<16)|0x8086: /* SERIES6 SATA */
case (0x2411<<16)|0x8086: /* 82801AA (ICH) */
case (0x2421<<16)|0x8086: /* 82801AB (ICH0) */
case (0x244A<<16)|0x8086: /* 82801BA (ICH2, Mobile) */
case (0x244B<<16)|0x8086: /* 82801BA (ICH2, High-End) */
case (0x248A<<16)|0x8086: /* 82801CA (ICH3, Mobile) */
case (0x248B<<16)|0x8086: /* 82801CA (ICH3, High-End) */
case (0x24CA<<16)|0x8086: /* 82801DBM (ICH4, Mobile) */
case (0x24CB<<16)|0x8086: /* 82801DB (ICH4, High-End) */
case (0x24D1<<16)|0x8086: /* 82801er (ich5) */
case (0x24DB<<16)|0x8086: /* 82801EB (ICH5) */
case (0x25A2<<16)|0x8086: /* 6300ESB pata */
case (0x25A3<<16)|0x8086: /* 6300ESB (E7210) */
case (0x266F<<16)|0x8086: /* 82801FB (ICH6) */
case (0x2651<<16)|0x8086: /* 82801FB (ICH6) */
case (0x2653<<16)|0x8086: /* 82801FBM (ICH6, Mobile) */
case (0x269e<<16)|0x8086: /* 63xxESB (intel 5000) */
case (0x27DF<<16)|0x8086: /* 82801G PATA (ICH7) */
case (0x27C0<<16)|0x8086: /* 82801GB SATA (ICH7) */
case (0x27C4<<16)|0x8086: /* 82801GBM SATA (ICH7) */
case (0x27C5<<16)|0x8086: /* 82801GBM SATA AHCI (ICH7) */
case (0x2850<<16)|0x8086: /* 82801HBM/HEM PATA */
case (0x2820<<16)|0x8086: /* 82801HB/HR/HH/HO SATA IDE */
case (0x2825<<16)|0x8086: /* 82801IIH Intel Q35 IDE */
case (0x2828<<16)|0x8086: /* 82801HBM SATA (ICH8-M) */
case (0x2829<<16)|0x8086: /* 82801HBM SATA AHCI (ICH8-M) */
case (0x2920<<16)|0x8086: /* 82801(IB)/IR/IH/IO SATA (ICH9) port 0-3 */
case (0x2921<<16)|0x8086: /* 82801(IB)/IR/IH/IO SATA (ICH9) port 0-1 */
case (0x2926<<16)|0x8086: /* 82801(IB)/IR/IH/IO SATA (ICH9) port 4-5 */
case (0x2928<<16)|0x8086: /* 82801(IB)/IR/IH/IO SATA (ICH9m) port 0-1 */
case (0x2929<<16)|0x8086: /* 82801(IB)/IR/IH/IO SATA (ICH9m) port 0-1, 4-5 */
case (0x292d<<16)|0x8086: /* 82801(IB)/IR/IH/IO SATA (ICH9m) port 4-5*/
case (0x3a20<<16)|0x8086: /* 82801ji (ich10) */
case (0x3a26<<16)|0x8086: /* 82801ji (ich10) */
case (0x3b20<<16)|0x8086: /* 34x0 (pch) port 0-3 */
case (0x3b21<<16)|0x8086: /* 34x0 (pch) port 4-5 */
case (0x3b28<<16)|0x8086: /* 34x0pm (pch) port 0-1, 4-5 */
case (0x3b2e<<16)|0x8086: /* 34x0pm (pch) port 0-3 */
map = 0;
if(pcicfgr16(p, 0x40) & 0x8000)
map |= 1;
if(pcicfgr16(p, 0x42) & 0x8000)
map |= 2;
irqack = ichirqack;
break;
case (0x811a<<16)|0x8086: /* Intel SCH (Poulsbo) */
map = 1;
irqack = ichirqack;
break;
case (0x1e3c<<16)|0x8086: /* C210 Series Chipset Family IDE-r Controller */
break;
}
for(channel = 0; channel < 2; channel++){
if((map & 1<<channel) == 0)
continue;
if(pi & 1<<2*channel){
sdev = ataprobe(p->mem[0+2*channel].bar & ~3,
p->mem[1+2*channel].bar & ~3,
p->intl, 3);
tbdf = p->tbdf;
}
else if(lchan[channel].probed == 0){
sdev = ataprobe(lchan[channel].cmdport,
lchan[channel].ctlport, lchan[channel].irq, 3);
lchan[channel].probed = 1;
tbdf = BUSUNKNOWN;
}
else
continue;
if(sdev == nil)
continue;
ctlr = sdev->ctlr;
if(ispc87415) {
ctlr->ienable = pc87415ienable;
print("pc87415disable: not yet implemented\n");
}
ctlr->tbdf = tbdf;
ctlr->pcidev = p;
ctlr->maxio = maxio;
ctlr->maxdma = maxdma;
ctlr->span = span;
ctlr->irqack = irqack;
if((pi & 0x80) && (p->mem[4].bar & 0x01))
ctlr->bmiba = (p->mem[4].bar & ~3) + channel*8;
if(head != nil)
tail->next = sdev;
else
head = sdev;
tail = sdev;
}
}
if(lchan[0].probed + lchan[1].probed == 0)
for(channel = 0; channel < 2; channel++){
sdev = nil;
if(lchan[channel].probed == 0){
// print("sdide: blind probe %.3ux\n", lchan[channel].cmdport);
sdev = ataprobe(lchan[channel].cmdport,
lchan[channel].ctlport, lchan[channel].irq, 3);
lchan[channel].probed = 1;
}
if(sdev == nil)
continue;
if(head != nil)
tail->next = sdev;
else
head = sdev;
tail = sdev;
}
if(0){
int port;
ISAConf isa;
/*
* Hack for PCMCIA drives.
* This will be tidied once we figure out how the whole
* removeable device thing is going to work.
*/
memset(&isa, 0, sizeof(isa));
isa.port = 0x180; /* change this for your machine */
isa.irq = 11; /* change this for your machine */
port = isa.port+0x0C;
channel = pcmspecial("MK2001MPL", &isa);
if(channel == -1)
channel = pcmspecial("SunDisk", &isa);
if(channel == -1){
isa.irq = 10;
channel = pcmspecial("CF", &isa);
}
if(channel == -1){
isa.irq = 10;
channel = pcmspecial("OLYMPUS", &isa);
}
if(channel == -1){
port = isa.port+0x204;
channel = pcmspecial("ATA/ATAPI", &isa);
}
if(channel >= 0 && (sdev = ataprobe(isa.port, port, isa.irq, 3)) != nil){
if(head != nil)
tail->next = sdev;
else
head = sdev;
}
}
return head;
}
static void
atadmaclr(Ctlr *ctlr)
{
int bmiba, bmisx;
if(ctlr->curdrive)
ataabort(ctlr->curdrive, 1);
bmiba = ctlr->bmiba;
if(bmiba == 0)
return;
atadmastop(ctlr);
outl(bmiba+Bmidtpx, 0);
bmisx = inb(bmiba+Bmisx) & ~Bmidea;
outb(bmiba+Bmisx, bmisx|Ideints|Idedmae);
// pciintst(ctlr->pcidev);
}
static int
ataenable(SDev* sdev)
{
Ctlr *ctlr;
char name[32];
ctlr = sdev->ctlr;
if(ctlr->bmiba){
atadmaclr(ctlr);
if(ctlr->pcidev != nil)
pcisetbme(ctlr->pcidev);
/* Intel SCH requires 8 byte alignment, though datasheet says 4 m( */
ctlr->prdt = mallocalign(Nprd*sizeof(Prd), 8, 0, 64*1024);
}
snprint(name, sizeof(name), "%s (%s)", sdev->name, sdev->ifc->name);
intrenable(ctlr->irq, atainterrupt, ctlr, ctlr->tbdf, name);
outb(ctlr->ctlport+Dc, 0);
if(ctlr->ienable)
ctlr->ienable(ctlr);
return 1;
}
static int
atadisable(SDev *sdev)
{
Ctlr *ctlr;
char name[32];
ctlr = sdev->ctlr;
outb(ctlr->ctlport+Dc, Nien); /* disable interrupts */
if (ctlr->idisable)
ctlr->idisable(ctlr);
snprint(name, sizeof(name), "%s (%s)", sdev->name, sdev->ifc->name);
intrdisable(ctlr->irq, atainterrupt, ctlr, ctlr->tbdf, name);
if(ctlr->bmiba) {
// atadmaclr(ctlr);
if (ctlr->pcidev)
pciclrbme(ctlr->pcidev);
free(ctlr->prdt);
ctlr->prdt = nil;
}
return 0;
}
static int
ataonline(SDunit *unit)
{
Drive *drive;
Ctlr *ctlr;
int ret;
if((ctlr = unit->dev->ctlr) == nil || ctlr->drive[unit->subno] == nil)
return 0;
ret = 1;
drive = ctlr->drive[unit->subno];
if((drive->flags & Online) == 0){
drive->flags |= Online;
atadrive(unit, drive, ctlr->cmdport, ctlr->ctlport, drive->dev);
ret = 2;
}
if(drive->feat & Datapi){
ulong dma;
dma = drive->dmactl;
drive->dmactl = 0;
ret = scsionline(unit);
drive->dmactl = dma;
} else {
unit->sectors = drive->sectors;
unit->secsize = drive->secsize;
}
return ret;
}
static char*
atarctl(SDunit* unit, char *p, char *e)
{
Ctlr *ctlr;
Drive *drive;
if((ctlr = unit->dev->ctlr) == nil || ctlr->drive[unit->subno] == nil)
return p;
drive = ctlr->drive[unit->subno];
qlock(drive);
p = seprint(p, e, "config %4.4uX capabilities %4.4uX", drive->info[Iconfig], drive->info[Icapabilities]);
if(drive->dma)
p = seprint(p, e, " dma %8.8uX dmactl %8.8uX", drive->dma, drive->dmactl);
if(drive->rwm)
p = seprint(p, e, " rwm %ud rwmctl %ud", drive->rwm, drive->rwmctl);
if(drive->feat & Dllba)
p = seprint(p, e, " lba48always %s", (drive->flags&Lba48always) ? "on" : "off");
p = seprint(p, e, "\n");
p = seprint(p, e, "model %s\n", drive->model);
p = seprint(p, e, "serial %s\n", drive->serial);
p = seprint(p, e, "firm %s\n", drive->firmware);
p = seprint(p, e, "feat ");
p = pflag(p, e, drive);
if(drive->sectors){
p = seprint(p, e, "geometry %llud %d", drive->sectors, drive->secsize);
if(drive->pkt == 0 && (drive->feat & Dlba) == 0)
p = seprint(p, e, " %d %d %d", drive->c, drive->h, drive->s);
p = seprint(p, e, "\n");
p = seprint(p, e, "alignment %d %d\n",
drive->secsize<<drive->physshift, drive->physalign);
}
p = seprint(p, e, "missirq %ud\n", drive->missirq);
p = seprint(p, e, "sloop %ud\n", drive->spurloop);
p = seprint(p, e, "irq %ud %ud\n", ctlr->nrq, drive->irq);
p = seprint(p, e, "bsy %ud %ud\n", ctlr->bsy, drive->bsy);
p = seprint(p, e, "nildrive %ud\n", ctlr->nildrive);
qunlock(drive);
return p;
}
static int
atawctl(SDunit* unit, Cmdbuf* cb)
{
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], "lba48always") == 0){
if(cb->nf != 2 || !(drive->feat & Dllba))
error(Ebadctl);
if(strcmp(cb->f[1], "on") == 0)
drive->flags |= Lba48always;
else if(strcmp(cb->f[1], "off") == 0)
drive->flags &= ~Lba48always;
else
error(Ebadctl);
}
else if(strcmp(cb->f[0], "identify") == 0){
atadrive(unit, drive, ctlr->cmdport, ctlr->ctlport, drive->dev);
}
else
error(Ebadctl);
qunlock(drive);
poperror();
return 0;
}
SDifc sdideifc = {
"ide", /* name */
atapnp, /* pnp */
ataenable, /* enable */
atadisable, /* disable */
scsiverify, /* verify */
ataonline, /* online */
atario, /* rio */
atarctl, /* rctl */
atawctl, /* wctl */
scsibio, /* bio */
ataprobew, /* probe */
ataclear, /* clear */
atastat, /* rtopctl */
nil, /* wtopctl */
ataataio,
};