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Commit 80bf7eef authored by Marc Zyngier's avatar Marc Zyngier Committed by Christoph Hellwig
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[PATCH] aha1740 update 

The included patch updates the old aha1740 driver to some of the 2.5
APIs :

- Generic DMA API
- EISA probing API
- SCSI hotplug API

It's been heavily tested on x86 (UP and SMP) as well as alpha (UP) for
the past two months.
parent 5476e462
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Showing with 541 additions and 449 deletions
drivers/scsi/aha1740.c
View file @ 80bf7eef
......@@ -8,6 +8,7 @@
*
* This file is aha1740.c, written and
* Copyright (C) 1992,1993 Brad McLean
* brad@saturn.gaylord.com or brad@bradpc.gaylord.com.
*
* Modifications to makecode and queuecommand
* for proper handling of multiple devices courteously
......@@ -23,6 +24,9 @@
*
* Reworked for new_eh and new locking by Alan Cox <alan@redhat.com>
*
* Converted to EISA and generic DMA APIs by Marc Zyngier
* <maz@wild-wind.fr.eu.org>, 4/2003.
*
* For the avoidance of doubt the "preferred form" of this code is one which
* is in an open non patent encumbered format. Where cryptographic key signing
* forms part of the process of creating an executable the information
......@@ -39,6 +43,10 @@
#include <linux/ioport.h>
#include <linux/proc_fs.h>
#include <linux/stat.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/eisa.h>
#include <linux/dma-mapping.h>
#include <asm/dma.h>
#include <asm/system.h>
......@@ -58,494 +66,568 @@
#define DEB(x)
#endif
/*
static const char RCSid[] = "$Header: /usr/src/linux/kernel/blk_drv/scsi/RCS/aha1740.c,v 1.1 1992/07/24 06:27:38 root Exp root $";
*/
struct aha1740_hostdata {
unsigned int slot;
unsigned int translation;
unsigned int last_ecb_used;
struct ecb ecb[AHA1740_ECBS];
struct eisa_device *edev;
unsigned int translation;
unsigned int last_ecb_used;
dma_addr_t ecb_dma_addr;
struct ecb ecb[AHA1740_ECBS];
};
struct aha1740_sg {
struct aha1740_chain sg_chain[AHA1740_SCATTER];
dma_addr_t sg_dma_addr;
dma_addr_t buf_dma_addr;
};
#define HOSTDATA(host) ((struct aha1740_hostdata *) &host->hostdata)
static spinlock_t aha1740_lock = SPIN_LOCK_UNLOCKED;
static inline struct ecb *ecb_dma_to_cpu (struct Scsi_Host *host,
dma_addr_t dma)
{
struct aha1740_hostdata *hdata = HOSTDATA (host);
dma_addr_t offset;
/* One for each IRQ level (9-15) */
static struct Scsi_Host * aha_host[8] = {NULL, };
offset = dma - hdata->ecb_dma_addr;
static int aha1740_proc_info(struct Scsi_Host *shpnt, char *buffer, char **start, off_t offset,
int length, int inout)
return (struct ecb *)(((char *) hdata->ecb) + (unsigned int) offset);
}
static inline dma_addr_t ecb_cpu_to_dma (struct Scsi_Host *host, void *cpu)
{
int len;
struct aha1740_hostdata *host;
struct aha1740_hostdata *hdata = HOSTDATA (host);
dma_addr_t offset;
offset = (char *) cpu - (char *) hdata->ecb;
return hdata->ecb_dma_addr + offset;
}
if (inout)
return-ENOSYS;
static int aha1740_proc_info(struct Scsi_Host *shpnt, char *buffer,
char **start, off_t offset,
int length, int inout)
{
int len;
struct aha1740_hostdata *host;
host = HOSTDATA(shpnt);
if (inout)
return-ENOSYS;
len = sprintf(buffer, "aha174x at IO:%lx, IRQ %d, SLOT %d.\n"
"Extended translation %sabled.\n",
shpnt->io_port, shpnt->irq, host->slot,
host->translation ? "en" : "dis");
host = HOSTDATA(shpnt);
if (offset > len) {
*start = buffer;
return 0;
}
len = sprintf(buffer, "aha174x at IO:%lx, IRQ %d, SLOT %d.\n"
"Extended translation %sabled.\n",
shpnt->io_port, shpnt->irq, host->edev->slot,
host->translation ? "en" : "dis");
*start = buffer + offset;
len -= offset;
if (len > length)
len = length;
return len;
if (offset > len) {
*start = buffer;
return 0;
}
*start = buffer + offset;
len -= offset;
if (len > length)
len = length;
return len;
}
static int aha1740_makecode(unchar *sense, unchar *status)
{
struct statusword
{
ushort don:1, /* Command Done - No Error */
du:1, /* Data underrun */
:1, qf:1, /* Queue full */
sc:1, /* Specification Check */
dor:1, /* Data overrun */
ch:1, /* Chaining Halted */
intr:1, /* Interrupt issued */
asa:1, /* Additional Status Available */
sns:1, /* Sense information Stored */
:1, ini:1, /* Initialization Required */
me:1, /* Major error or exception */
:1, eca:1, /* Extended Contingent alliance */
:1;
} status_word;
int retval = DID_OK;
status_word = * (struct statusword *) status;
struct statusword
{
ushort don:1, /* Command Done - No Error */
du:1, /* Data underrun */
:1, qf:1, /* Queue full */
sc:1, /* Specification Check */
dor:1, /* Data overrun */
ch:1, /* Chaining Halted */
intr:1, /* Interrupt issued */
asa:1, /* Additional Status Available */
sns:1, /* Sense information Stored */
:1, ini:1, /* Initialization Required */
me:1, /* Major error or exception */
:1, eca:1, /* Extended Contingent alliance */
:1;
} status_word;
int retval = DID_OK;
status_word = * (struct statusword *) status;
#ifdef DEBUG
printk("makecode from %x,%x,%x,%x %x,%x,%x,%x",
status[0], status[1], status[2], status[3],
sense[0], sense[1], sense[2], sense[3]);
printk("makecode from %x,%x,%x,%x %x,%x,%x,%x",
status[0], status[1], status[2], status[3],
sense[0], sense[1], sense[2], sense[3]);
#endif
if (!status_word.don) /* Anything abnormal was detected */
{
if ( (status[1]&0x18) || status_word.sc ) /*Additional info available*/
{
/* Use the supplied info for further diagnostics */
switch ( status[2] )
{
case 0x12:
if ( status_word.dor )
retval=DID_ERROR; /* It's an Overrun */
/* If not overrun, assume underrun and ignore it! */
case 0x00: /* No info, assume no error, should not occur */
break;
case 0x11:
case 0x21:
retval=DID_TIME_OUT;
break;
case 0x0a:
retval=DID_BAD_TARGET;
break;
case 0x04:
case 0x05:
retval=DID_ABORT;
/* Either by this driver or the AHA1740 itself */
break;
default:
retval=DID_ERROR; /* No further diagnostics possible */
}
}
else
{ /* Michael suggests, and Brad concurs: */
if ( status_word.qf )
{
retval = DID_TIME_OUT; /* forces a redo */
/* I think this specific one should not happen -Brad */
printk("aha1740.c: WARNING: AHA1740 queue overflow!\n");
}
else if ( status[0]&0x60 )
{
retval = DID_ERROR; /* Didn't find a better error */
}
/* In any other case return DID_OK so for example
CONDITION_CHECKS make it through to the appropriate
device driver */
if (!status_word.don) { /* Anything abnormal was detected */
if ( (status[1]&0x18) || status_word.sc ) {
/*Additional info available*/
/* Use the supplied info for further diagnostics */
switch ( status[2] ) {
case 0x12:
if ( status_word.dor )
retval=DID_ERROR; /* It's an Overrun */
/* If not overrun, assume underrun and
* ignore it! */
case 0x00: /* No info, assume no error, should
* not occur */
break;
case 0x11:
case 0x21:
retval=DID_TIME_OUT;
break;
case 0x0a:
retval=DID_BAD_TARGET;
break;
case 0x04:
case 0x05:
retval=DID_ABORT;
/* Either by this driver or the
* AHA1740 itself */
break;
default:
retval=DID_ERROR; /* No further
* diagnostics
* possible */
}
} else {
/* Michael suggests, and Brad concurs: */
if ( status_word.qf ) {
retval = DID_TIME_OUT; /* forces a redo */
/* I think this specific one should
* not happen -Brad */
printk("aha1740.c: WARNING: AHA1740 queue overflow!\n");
} else
if ( status[0]&0x60 ) {
/* Didn't find a better error */
retval = DID_ERROR;
}
/* In any other case return DID_OK so for example
CONDITION_CHECKS make it through to the appropriate
device driver */
}
}
}
/* Under all circumstances supply the target status -Michael */
return status[3] | retval << 16;
/* Under all circumstances supply the target status -Michael */
return status[3] | retval << 16;
}
static int aha1740_test_port(unsigned int base)
{
char name[4], tmp;
/* Okay, look for the EISA ID's */
name[0]= 'A' -1 + ((tmp = inb(HID0(base))) >> 2); /* First character */
name[1]= 'A' -1 + ((tmp & 3) << 3);
name[1]+= ((tmp = inb(HID1(base))) >> 5)&0x7; /* Second Character */
name[2]= 'A' -1 + (tmp & 0x1f); /* Third Character */
name[3]=0;
tmp = inb(HID2(base));
if ( strcmp ( name, HID_MFG ) || inb(HID2(base)) != HID_PRD )
return 0; /* Not an Adaptec 174x */
/* if ( inb(HID3(base)) != HID_REV )
printk("aha174x: Warning; board revision of %d; expected %d\n",
inb(HID3(base)),HID_REV); */
if ( inb(EBCNTRL(base)) != EBCNTRL_VALUE )
{
printk("aha174x: Board detected, but EBCNTRL = %x, so disabled it.\n",
inb(EBCNTRL(base)));
return 0;
}
if ( inb(PORTADR(base)) & PORTADDR_ENH )
return 1; /* Okay, we're all set */
if ( inb(PORTADR(base)) & PORTADDR_ENH )
return 1; /* Okay, we're all set */
printk("aha174x: Board detected, but not in enhanced mode, so disabled it.\n");
return 0;
printk("aha174x: Board detected, but not in enhanced mode, so disabled it.\n");
return 0;
}
/* A "high" level interrupt handler */
static irqreturn_t aha1740_intr_handle(int irq, void *dev_id,
struct pt_regs *regs)
struct pt_regs *regs)
{
struct Scsi_Host *host = aha_host[irq - 9];
void (*my_done)(Scsi_Cmnd *);
int errstatus, adapstat;
int number_serviced;
struct ecb *ecbptr;
Scsi_Cmnd *SCtmp;
unsigned int base;
unsigned long flags;
int handled = 0;
if (!host)
panic("aha1740.c: Irq from unknown host!\n");
spin_lock_irqsave(host->host_lock, flags);
base = host->io_port;
number_serviced = 0;
while(inb(G2STAT(base)) & G2STAT_INTPEND)
{
handled = 1;
DEB(printk("aha1740_intr top of loop.\n"));
adapstat = inb(G2INTST(base));
ecbptr = (struct ecb *) isa_bus_to_virt(inl(MBOXIN0(base)));
outb(G2CNTRL_IRST,G2CNTRL(base)); /* interrupt reset */
struct Scsi_Host *host = (struct Scsi_Host *) dev_id;
void (*my_done)(Scsi_Cmnd *);
int errstatus, adapstat;
int number_serviced;
struct ecb *ecbptr;
Scsi_Cmnd *SCtmp;
unsigned int base;
unsigned long flags;
int handled = 0;
struct aha1740_sg *sgptr;
struct eisa_device *edev;
if (!host)
panic("aha1740.c: Irq from unknown host!\n");
spin_lock_irqsave(host->host_lock, flags);
base = host->io_port;
number_serviced = 0;
edev = HOSTDATA(host)->edev;
while(inb(G2STAT(base)) & G2STAT_INTPEND) {
handled = 1;
DEB(printk("aha1740_intr top of loop.\n"));
adapstat = inb(G2INTST(base));
ecbptr = ecb_dma_to_cpu (host, inl(MBOXIN0(base)));
outb(G2CNTRL_IRST,G2CNTRL(base)); /* interrupt reset */
switch ( adapstat & G2INTST_MASK )
{
case G2INTST_CCBRETRY:
case G2INTST_CCBERROR:
case G2INTST_CCBGOOD:
/* Host Ready -> Mailbox in complete */
outb(G2CNTRL_HRDY,G2CNTRL(base));
if (!ecbptr)
{
printk("Aha1740 null ecbptr in interrupt (%x,%x,%x,%d)\n",
inb(G2STAT(base)),adapstat,
inb(G2INTST(base)), number_serviced++);
continue;
}
SCtmp = ecbptr->SCpnt;
if (!SCtmp)
{
printk("Aha1740 null SCtmp in interrupt (%x,%x,%x,%d)\n",
inb(G2STAT(base)),adapstat,
inb(G2INTST(base)), number_serviced++);
continue;
}
if (SCtmp->host_scribble)
kfree(SCtmp->host_scribble);
/* Fetch the sense data, and tuck it away, in the required slot.
The Adaptec automatically fetches it, and there is no
guarantee that we will still have it in the cdb when we come
back */
if ( (adapstat & G2INTST_MASK) == G2INTST_CCBERROR )
{
memcpy(SCtmp->sense_buffer, ecbptr->sense,
sizeof(SCtmp->sense_buffer));
errstatus = aha1740_makecode(ecbptr->sense,ecbptr->status);
}
else
errstatus = 0;
DEB(if (errstatus) printk("aha1740_intr_handle: returning %6x\n",
errstatus));
SCtmp->result = errstatus;
my_done = ecbptr->done;
memset(ecbptr,0,sizeof(struct ecb));
if ( my_done )
my_done(SCtmp);
break;
case G2INTST_HARDFAIL:
printk(KERN_ALERT "aha1740 hardware failure!\n");
panic("aha1740.c"); /* Goodbye */
case G2INTST_ASNEVENT:
printk("aha1740 asynchronous event: %02x %02x %02x %02x %02x\n",
adapstat, inb(MBOXIN0(base)), inb(MBOXIN1(base)),
inb(MBOXIN2(base)), inb(MBOXIN3(base))); /* Say What? */
/* Host Ready -> Mailbox in complete */
outb(G2CNTRL_HRDY,G2CNTRL(base));
break;
case G2INTST_CMDGOOD:
/* set immediate command success flag here: */
break;
case G2INTST_CMDERROR:
/* Set immediate command failure flag here: */
break;
switch ( adapstat & G2INTST_MASK ) {
case G2INTST_CCBRETRY:
case G2INTST_CCBERROR:
case G2INTST_CCBGOOD:
/* Host Ready -> Mailbox in complete */
outb(G2CNTRL_HRDY,G2CNTRL(base));
if (!ecbptr) {
printk("Aha1740 null ecbptr in interrupt (%x,%x,%x,%d)\n",
inb(G2STAT(base)),adapstat,
inb(G2INTST(base)), number_serviced++);
continue;
}
SCtmp = ecbptr->SCpnt;
if (!SCtmp) {
printk("Aha1740 null SCtmp in interrupt (%x,%x,%x,%d)\n",
inb(G2STAT(base)),adapstat,
inb(G2INTST(base)), number_serviced++);
continue;
}
sgptr = (struct aha1740_sg *) SCtmp->host_scribble;
if (SCtmp->use_sg) {
/* We used scatter-gather.
Do the unmapping dance. */
dma_unmap_sg (&edev->dev,
(struct scatterlist *) SCtmp->request_buffer,
SCtmp->use_sg,
scsi_to_dma_dir (SCtmp->sc_data_direction));
} else {
dma_unmap_single (&edev->dev,
sgptr->buf_dma_addr,
SCtmp->request_bufflen,
DMA_BIDIRECTIONAL);
}
/* Free the sg block */
dma_free_coherent (&edev->dev,
sizeof (struct aha1740_sg),
SCtmp->host_scribble,
sgptr->sg_dma_addr);
/* Fetch the sense data, and tuck it away, in
the required slot. The Adaptec
automatically fetches it, and there is no
guarantee that we will still have it in the
cdb when we come back */
if ( (adapstat & G2INTST_MASK) == G2INTST_CCBERROR ) {
memcpy(SCtmp->sense_buffer, ecbptr->sense,
sizeof(SCtmp->sense_buffer));
errstatus = aha1740_makecode(ecbptr->sense,ecbptr->status);
} else
errstatus = 0;
DEB(if (errstatus)
printk("aha1740_intr_handle: returning %6x\n",
errstatus));
SCtmp->result = errstatus;
my_done = ecbptr->done;
memset(ecbptr,0,sizeof(struct ecb));
if ( my_done )
my_done(SCtmp);
break;
case G2INTST_HARDFAIL:
printk(KERN_ALERT "aha1740 hardware failure!\n");
panic("aha1740.c"); /* Goodbye */
case G2INTST_ASNEVENT:
printk("aha1740 asynchronous event: %02x %02x %02x %02x %02x\n",
adapstat,
inb(MBOXIN0(base)),
inb(MBOXIN1(base)),
inb(MBOXIN2(base)),
inb(MBOXIN3(base))); /* Say What? */
/* Host Ready -> Mailbox in complete */
outb(G2CNTRL_HRDY,G2CNTRL(base));
break;
case G2INTST_CMDGOOD:
/* set immediate command success flag here: */
break;
case G2INTST_CMDERROR:
/* Set immediate command failure flag here: */
break;
}
number_serviced++;
}
number_serviced++;
}
spin_unlock_irqrestore(host->host_lock, flags);
return IRQ_RETVAL(handled);
spin_unlock_irqrestore(host->host_lock, flags);
return IRQ_RETVAL(handled);
}
static int aha1740_queuecommand(Scsi_Cmnd * SCpnt, void (*done)(Scsi_Cmnd *))
{
unchar direction;
unchar *cmd = (unchar *) SCpnt->cmnd;
unchar target = SCpnt->device->id;
struct aha1740_hostdata *host = HOSTDATA(SCpnt->device->host);
unsigned long flags;
void *buff = SCpnt->request_buffer;
int bufflen = SCpnt->request_bufflen;
int ecbno;
DEB(int i);
if(*cmd == REQUEST_SENSE)
{
SCpnt->result = 0;
done(SCpnt);
return 0;
}
unchar direction;
unchar *cmd = (unchar *) SCpnt->cmnd;
unchar target = SCpnt->device->id;
struct aha1740_hostdata *host = HOSTDATA(SCpnt->device->host);
unsigned long flags;
void *buff = SCpnt->request_buffer;
int bufflen = SCpnt->request_bufflen;
dma_addr_t sg_dma;
struct aha1740_sg *sgptr;
int ecbno;
DEB(int i);
if(*cmd == REQUEST_SENSE) {
SCpnt->result = 0;
done(SCpnt);
return 0;
}
#ifdef DEBUG
if (*cmd == READ_10 || *cmd == WRITE_10)
i = xscsi2int(cmd+2);
else if (*cmd == READ_6 || *cmd == WRITE_6)
i = scsi2int(cmd+2);
else
i = -1;
printk("aha1740_queuecommand: dev %d cmd %02x pos %d len %d ",
target, *cmd, i, bufflen);
printk("scsi cmd:");
for (i = 0; i < SCpnt->cmd_len; i++) printk("%02x ", cmd[i]);
printk("\n");
if (*cmd == READ_10 || *cmd == WRITE_10)
i = xscsi2int(cmd+2);
else if (*cmd == READ_6 || *cmd == WRITE_6)
i = scsi2int(cmd+2);
else
i = -1;
printk("aha1740_queuecommand: dev %d cmd %02x pos %d len %d ",
target, *cmd, i, bufflen);
printk("scsi cmd:");
for (i = 0; i < SCpnt->cmd_len; i++) printk("%02x ", cmd[i]);
printk("\n");
#endif
/* locate an available ecb */
spin_lock_irqsave(&aha1740_lock, flags);
ecbno = host->last_ecb_used + 1; /* An optimization */
if (ecbno >= AHA1740_ECBS)
ecbno = 0;
do {
if (!host->ecb[ecbno].cmdw)
break;
ecbno++;
/* locate an available ecb */
spin_lock_irqsave(&SCpnt->device->host->host_lock, flags);
ecbno = host->last_ecb_used + 1; /* An optimization */
if (ecbno >= AHA1740_ECBS)
ecbno = 0;
} while (ecbno != host->last_ecb_used);
ecbno = 0;
do {
if (!host->ecb[ecbno].cmdw)
break;
ecbno++;
if (ecbno >= AHA1740_ECBS)
ecbno = 0;
} while (ecbno != host->last_ecb_used);
if (host->ecb[ecbno].cmdw)
panic("Unable to find empty ecb for aha1740.\n");
if (host->ecb[ecbno].cmdw)
panic("Unable to find empty ecb for aha1740.\n");
host->ecb[ecbno].cmdw = AHA1740CMD_INIT; /* SCSI Initiator Command
doubles as reserved flag */
host->ecb[ecbno].cmdw = AHA1740CMD_INIT; /* SCSI Initiator Command
doubles as reserved flag */
host->last_ecb_used = ecbno;
spin_unlock_irqrestore(&aha1740_lock, flags);
host->last_ecb_used = ecbno;
spin_unlock_irqrestore(&SCpnt->device->host->host_lock, flags);
#ifdef DEBUG
printk("Sending command (%d %x)...", ecbno, done);
printk("Sending command (%d %x)...", ecbno, done);
#endif
host->ecb[ecbno].cdblen = SCpnt->cmd_len; /* SCSI Command Descriptor Block Length */
host->ecb[ecbno].cdblen = SCpnt->cmd_len; /* SCSI Command
* Descriptor Block
* Length */
direction = 0;
if (*cmd == READ_10 || *cmd == READ_6)
direction = 1;
else if (*cmd == WRITE_10 || *cmd == WRITE_6)
direction = 0;
if (*cmd == READ_10 || *cmd == READ_6)
direction = 1;
else if (*cmd == WRITE_10 || *cmd == WRITE_6)
direction = 0;
memcpy(host->ecb[ecbno].cdb, cmd, SCpnt->cmd_len);
memcpy(host->ecb[ecbno].cdb, cmd, SCpnt->cmd_len);
if (SCpnt->use_sg)
{
struct scatterlist * sgpnt;
struct aha1740_chain * cptr;
int i;
DEB(unsigned char * ptr);
host->ecb[ecbno].sg = 1; /* SCSI Initiator Command w/scatter-gather*/
SCpnt->host_scribble = (unsigned char *)kmalloc(512, GFP_KERNEL);
if(SCpnt->host_scribble == NULL)
{
SCpnt->host_scribble = dma_alloc_coherent (&host->edev->dev,
sizeof (struct aha1740_sg),
&sg_dma, GFP_ATOMIC);
if(SCpnt->host_scribble == NULL) {
printk(KERN_WARNING "aha1740: out of memory in queuecommand!\n");
return 1;
}
sgpnt = (struct scatterlist *) SCpnt->request_buffer;
cptr = (struct aha1740_chain *) SCpnt->host_scribble;
for(i=0; i<SCpnt->use_sg; i++)
{
cptr[i].datalen = sgpnt[i].length;
cptr[i].dataptr = isa_virt_to_bus(page_address(sgpnt[i].page) + sgpnt[i].offset);
}
host->ecb[ecbno].datalen = SCpnt->use_sg * sizeof(struct aha1740_chain);
host->ecb[ecbno].dataptr = isa_virt_to_bus(cptr);
sgptr = (struct aha1740_sg *) SCpnt->host_scribble;
sgptr->sg_dma_addr = sg_dma;
if (SCpnt->use_sg) {
struct scatterlist * sgpnt;
struct aha1740_chain * cptr;
int i, count;
DEB(unsigned char * ptr);
host->ecb[ecbno].sg = 1; /* SCSI Initiator Command
* w/scatter-gather*/
sgpnt = (struct scatterlist *) SCpnt->request_buffer;
cptr = sgptr->sg_chain;
count = dma_map_sg (&host->edev->dev, sgpnt, SCpnt->use_sg,
scsi_to_dma_dir(SCpnt->sc_data_direction));
for(i=0; i < count; i++) {
cptr[i].datalen = sg_dma_len (sgpnt + i);
cptr[i].dataptr = sg_dma_address (sgpnt + i);
}
host->ecb[ecbno].datalen = count*sizeof(struct aha1740_chain);
host->ecb[ecbno].dataptr = sg_dma;
#ifdef DEBUG
printk("cptr %x: ",cptr);
ptr = (unsigned char *) cptr;
for(i=0;i<24;i++) printk("%02x ", ptr[i]);
printk("cptr %x: ",cptr);
ptr = (unsigned char *) cptr;
for(i=0;i<24;i++) printk("%02x ", ptr[i]);
#endif
}
else
{
SCpnt->host_scribble = NULL;
host->ecb[ecbno].datalen = bufflen;
host->ecb[ecbno].dataptr = isa_virt_to_bus(buff);
}
host->ecb[ecbno].lun = SCpnt->device->lun;
host->ecb[ecbno].ses = 1; /* Suppress underrun errors */
host->ecb[ecbno].dir = direction;
host->ecb[ecbno].ars = 1; /* Yes, get the sense on an error */
host->ecb[ecbno].senselen = 12;
host->ecb[ecbno].senseptr = isa_virt_to_bus(host->ecb[ecbno].sense);
host->ecb[ecbno].statusptr = isa_virt_to_bus(host->ecb[ecbno].status);
host->ecb[ecbno].done = done;
host->ecb[ecbno].SCpnt = SCpnt;
} else {
host->ecb[ecbno].datalen = bufflen;
sgptr->buf_dma_addr = dma_map_single (&host->edev->dev,
buff, bufflen,
DMA_BIDIRECTIONAL);
host->ecb[ecbno].dataptr = sgptr->buf_dma_addr;
}
host->ecb[ecbno].lun = SCpnt->device->lun;
host->ecb[ecbno].ses = 1; /* Suppress underrun errors */
host->ecb[ecbno].dir = direction;
host->ecb[ecbno].ars = 1; /* Yes, get the sense on an error */
host->ecb[ecbno].senselen = 12;
host->ecb[ecbno].senseptr = ecb_cpu_to_dma (SCpnt->device->host,
host->ecb[ecbno].sense);
host->ecb[ecbno].statusptr = ecb_cpu_to_dma (SCpnt->device->host,
host->ecb[ecbno].status);
host->ecb[ecbno].done = done;
host->ecb[ecbno].SCpnt = SCpnt;
#ifdef DEBUG
{
int i;
printk("aha1740_command: sending.. ");
for (i = 0; i < sizeof(host->ecb[ecbno]) - 10; i++)
printk("%02x ", ((unchar *)&host->ecb[ecbno])[i]);
}
printk("\n");
{
int i;
printk("aha1740_command: sending.. ");
for (i = 0; i < sizeof(host->ecb[ecbno]) - 10; i++)
printk("%02x ", ((unchar *)&host->ecb[ecbno])[i]);
}
printk("\n");
#endif
if (done)
{ /* The Adaptec Spec says the card is so fast that the loops will
only be executed once in the code below. Even if this was true
with the fastest processors when the spec was written, it doesn't
seem to be true with todays fast processors. We print a warning
if the code is executed more often than LOOPCNT_WARN. If this
happens, it should be investigated. If the count reaches
LOOPCNT_MAX, we assume something is broken; since there is no
way to return an error (the return value is ignored by the
mid-level scsi layer) we have to panic (and maybe that's the
best thing we can do then anyhow). */
if (done) {
/* The Adaptec Spec says the card is so fast that the loops
will only be executed once in the code below. Even if this
was true with the fastest processors when the spec was
written, it doesn't seem to be true with todays fast
processors. We print a warning if the code is executed more
often than LOOPCNT_WARN. If this happens, it should be
investigated. If the count reaches LOOPCNT_MAX, we assume
something is broken; since there is no way to return an
error (the return value is ignored by the mid-level scsi
layer) we have to panic (and maybe that's the best thing we
can do then anyhow). */
#define LOOPCNT_WARN 10 /* excessive mbxout wait -> syslog-msg */
#define LOOPCNT_MAX 1000000 /* mbxout deadlock -> panic() after ~ 2 sec. */
int loopcnt;
unsigned int base = SCpnt->device->host->io_port;
DEB(printk("aha1740[%d] critical section\n",ecbno));
spin_lock_irqsave(&aha1740_lock, flags);
for (loopcnt = 0; ; loopcnt++) {
if (inb(G2STAT(base)) & G2STAT_MBXOUT) break;
if (loopcnt == LOOPCNT_WARN) {
printk("aha1740[%d]_mbxout wait!\n",ecbno);
}
if (loopcnt == LOOPCNT_MAX)
panic("aha1740.c: mbxout busy!\n");
}
outl(isa_virt_to_bus(host->ecb + ecbno), MBOXOUT0(base));
for (loopcnt = 0; ; loopcnt++) {
if (! (inb(G2STAT(base)) & G2STAT_BUSY)) break;
if (loopcnt == LOOPCNT_WARN) {
printk("aha1740[%d]_attn wait!\n",ecbno);
}
if (loopcnt == LOOPCNT_MAX)
panic("aha1740.c: attn wait failed!\n");
}
outb(ATTN_START | (target & 7), ATTN(base)); /* Start it up */
spin_unlock_irqrestore(&aha1740_lock, flags);
DEB(printk("aha1740[%d] request queued.\n",ecbno));
}
else
printk(KERN_ALERT "aha1740_queuecommand: done can't be NULL\n");
return 0;
int loopcnt;
unsigned int base = SCpnt->device->host->io_port;
DEB(printk("aha1740[%d] critical section\n",ecbno));
spin_lock_irqsave(&SCpnt->device->host->host_lock, flags);
for (loopcnt = 0; ; loopcnt++) {
if (inb(G2STAT(base)) & G2STAT_MBXOUT) break;
if (loopcnt == LOOPCNT_WARN) {
printk("aha1740[%d]_mbxout wait!\n",ecbno);
}
if (loopcnt == LOOPCNT_MAX)
panic("aha1740.c: mbxout busy!\n");
}
outl (ecb_cpu_to_dma (SCpnt->device->host, host->ecb + ecbno),
MBOXOUT0(base));
for (loopcnt = 0; ; loopcnt++) {
if (! (inb(G2STAT(base)) & G2STAT_BUSY)) break;
if (loopcnt == LOOPCNT_WARN) {
printk("aha1740[%d]_attn wait!\n",ecbno);
}
if (loopcnt == LOOPCNT_MAX)
panic("aha1740.c: attn wait failed!\n");
}
outb(ATTN_START | (target & 7), ATTN(base)); /* Start it up */
spin_unlock_irqrestore(&SCpnt->device->host->host_lock, flags);
DEB(printk("aha1740[%d] request queued.\n",ecbno));
} else
printk(KERN_ALERT "aha1740_queuecommand: done can't be NULL\n");
return 0;
}
static void internal_done(Scsi_Cmnd * SCpnt)
{
SCpnt->SCp.Status++;
SCpnt->SCp.Status++;
}
static int aha1740_command(Scsi_Cmnd * SCpnt)
{
aha1740_queuecommand(SCpnt, internal_done);
SCpnt->SCp.Status = 0;
while (!SCpnt->SCp.Status)
{
cpu_relax();
barrier();
}
return SCpnt->result;
aha1740_queuecommand(SCpnt, internal_done);
SCpnt->SCp.Status = 0;
while (!SCpnt->SCp.Status)
{
cpu_relax();
barrier();
}
return SCpnt->result;
}
/* Query the board for its irq_level. Nothing else matters
in enhanced mode on an EISA bus. */
static void aha1740_getconfig(unsigned int base, unsigned int *irq_level,
unsigned int *translation)
unsigned int *translation)
{
static int intab[] = { 9, 10, 11, 12, 0, 14, 15, 0 };
static int intab[] = { 9, 10, 11, 12, 0, 14, 15, 0 };
*irq_level = intab[inb(INTDEF(base)) & 0x7];
*translation = inb(RESV1(base)) & 0x1;
outb(inb(INTDEF(base)) | 0x10, INTDEF(base));
*irq_level = intab[inb(INTDEF(base)) & 0x7];
*translation = inb(RESV1(base)) & 0x1;
outb(inb(INTDEF(base)) | 0x10, INTDEF(base));
}
static int aha1740_biosparam(struct scsi_device *sdev,
struct block_device *dev,
sector_t capacity, int* ip)
{
int size = capacity;
int extended = HOSTDATA(sdev->host)->translation;
DEB(printk("aha1740_biosparam\n"));
if (extended && (ip[2] > 1024)) {
ip[0] = 255;
ip[1] = 63;
ip[2] = size / (255 * 63);
} else {
ip[0] = 64;
ip[1] = 32;
ip[2] = size >> 11;
}
return 0;
}
static int aha1740_detect(Scsi_Host_Template * tpnt)
static int aha1740_eh_abort_handler (Scsi_Cmnd *dummy)
{
int count = 0, slot;
/*
* From Alan Cox :
* The AHA1740 has firmware handled abort/reset handling. The "head in
* sand" kernel code is correct for once 8)
*
* So we define a dummy handler just to keep the kernel SCSI code as
* quiet as possible...
*/
DEB(printk("aha1740_detect: \n"));
return 0;
}
for ( slot=MINEISA; slot <= MAXEISA; slot++ )
{
static Scsi_Host_Template aha1740_template = {
.module = THIS_MODULE,
.proc_name = "aha1740",
.proc_info = aha1740_proc_info,
.name = "Adaptec 174x (EISA)",
.command = aha1740_command,
.queuecommand = aha1740_queuecommand,
.bios_param = aha1740_biosparam,
.can_queue = AHA1740_ECBS,
.this_id = 7,
.sg_tablesize = AHA1740_SCATTER,
.cmd_per_lun = AHA1740_CMDLUN,
.use_clustering = ENABLE_CLUSTERING,
.eh_abort_handler = aha1740_eh_abort_handler,
};
static int aha1740_probe (struct device *dev)
{
int slotbase;
unsigned int irq_level, translation;
struct Scsi_Host *shpnt;
struct aha1740_hostdata *host;
slotbase = SLOTBASE(slot);
/*
* The ioports for eisa boards are generally beyond that used in the
* check/allocate region code, but this may change at some point,
* so we go through the motions.
*/
if (!request_region(slotbase, SLOTSIZE, "aha1740")) /* See if in use */
continue;
struct eisa_device *edev = to_eisa_device (dev);
DEB(printk("aha1740_probe: \n"));
slotbase = edev->base_addr + EISA_VENDOR_ID_OFFSET;
if (!request_region(slotbase, SLOTSIZE, "aha1740")) /* See if in use */
return -EBUSY;
if (!aha1740_test_port(slotbase))
goto err_release;
goto err_release;
aha1740_getconfig(slotbase,&irq_level,&translation);
if ((inb(G2STAT(slotbase)) &
(G2STAT_MBXOUT|G2STAT_BUSY)) != G2STAT_MBXOUT)
{ /* If the card isn't ready, hard reset it */
outb(G2CNTRL_HRST, G2CNTRL(slotbase));
outb(0, G2CNTRL(slotbase));
(G2STAT_MBXOUT|G2STAT_BUSY)) != G2STAT_MBXOUT) {
/* If the card isn't ready, hard reset it */
outb(G2CNTRL_HRST, G2CNTRL(slotbase));
outb(0, G2CNTRL(slotbase));
}
printk(KERN_INFO "Configuring aha174x at IO:%x, IRQ %d\n", slotbase, irq_level);
printk(KERN_INFO "Configuring %s at IO:%x, IRQ %d\n",
dev->name, slotbase, irq_level);
printk(KERN_INFO "aha174x: Extended translation %sabled.\n",
translation ? "en" : "dis");
DEB(printk("aha1740_detect: enable interrupt channel %d\n",irq_level));
if (request_irq(irq_level,aha1740_intr_handle,0,"aha1740",NULL)) {
printk("Unable to allocate IRQ for adaptec controller.\n");
goto err_release;
}
shpnt = scsi_register(tpnt, sizeof(struct aha1740_hostdata));
shpnt = scsi_register(&aha1740_template,
sizeof(struct aha1740_hostdata));
if(shpnt == NULL)
goto err_free_irq;
goto err_release;
shpnt->base = 0;
shpnt->io_port = slotbase;
......@@ -553,60 +635,80 @@ static int aha1740_detect(Scsi_Host_Template * tpnt)
shpnt->irq = irq_level;
shpnt->dma_channel = 0xff;
host = HOSTDATA(shpnt);
host->slot = slot;
host->edev = edev;
host->translation = translation;
aha_host[irq_level - 9] = shpnt;
count++;
continue;
host->ecb_dma_addr = dma_map_single (&edev->dev, host->ecb,
sizeof (host->ecb),
DMA_BIDIRECTIONAL);
if (!host->ecb_dma_addr) {
printk (KERN_ERR "aha1740_probe: Couldn't map ECB, giving up\n");
scsi_unregister (shpnt);
goto err_release;
}
DEB(printk("aha1740_probe: enable interrupt channel %d\n",irq_level));
if (request_irq(irq_level,aha1740_intr_handle,0,"aha1740",shpnt)) {
printk(KERN_ERR "aha1740_probe: Unable to allocate IRQ %d.\n",
irq_level);
goto err_release;
}
eisa_set_drvdata (edev, shpnt);
scsi_add_host (shpnt, dev);
return 0;
err_free_irq:
free_irq(irq_level, aha1740_intr_handle);
err_release:
err_release:
release_region(slotbase, SLOTSIZE);
}
return count;
return -ENODEV;
}
static int aha1740_biosparam(struct scsi_device *sdev, struct block_device *dev,
sector_t capacity, int* ip)
static __devexit int aha1740_remove (struct device *dev)
{
int size = capacity;
int extended = HOSTDATA(sdev->host)->translation;
DEB(printk("aha1740_biosparam\n"));
if (extended && (ip[2] > 1024))
{
ip[0] = 255;
ip[1] = 63;
ip[2] = size / (255 * 63);
}
else
{
ip[0] = 64;
ip[1] = 32;
ip[2] = size >> 11;
}
return 0;
struct Scsi_Host *shpnt = dev->driver_data;
struct aha1740_hostdata *host = HOSTDATA (shpnt);
if (scsi_remove_host (shpnt))
return -EBUSY;
free_irq (shpnt->irq, shpnt);
dma_unmap_single (dev, host->ecb_dma_addr,
sizeof (host->ecb), DMA_BIDIRECTIONAL);
release_region (shpnt->io_port, SLOTSIZE);
scsi_unregister (shpnt);
return 0;
}
MODULE_LICENSE("GPL");
static struct eisa_device_id aha1740_ids[] = {
{ "ADP0000" }, /* 1740 */
{ "ADP0001" }, /* 1740A */
{ "ADP0002" }, /* 1742A */
{ "ADP0400" }, /* 1744 */
{ "" }
};
static Scsi_Host_Template driver_template = {
.proc_name = "aha1740",
.proc_info = aha1740_proc_info,
.name = "Adaptec 174x (EISA)",
.detect = aha1740_detect,
.command = aha1740_command,
.queuecommand = aha1740_queuecommand,
.bios_param = aha1740_biosparam,
.can_queue = AHA1740_ECBS,
.this_id = 7,
.sg_tablesize = AHA1740_SCATTER,
.cmd_per_lun = AHA1740_CMDLUN,
.use_clustering = ENABLE_CLUSTERING,
static struct eisa_driver aha1740_driver = {
.id_table = aha1740_ids,
.driver = {
.name = "aha1740",
.probe = aha1740_probe,
.remove = __devexit_p (aha1740_remove),
},
};
#include "scsi_module.c"
/* Okay, you made it all the way through. As of this writing, 3/31/93, I'm
brad@saturn.gaylord.com or brad@bradpc.gaylord.com. I'll try to help as time
permits if you have any trouble with this driver. Happy Linuxing! */
static __init int aha1740_init (void)
{
return eisa_driver_register (&aha1740_driver);
}
static __exit void aha1740_exit (void)
{
eisa_driver_unregister (&aha1740_driver);
}
module_init (aha1740_init);
module_exit (aha1740_exit);
MODULE_LICENSE("GPL");
drivers/scsi/aha1740.h
View file @ 80bf7eef
......@@ -12,11 +12,6 @@
#include <linux/types.h>
/* Eisa Enhanced mode operation - slot locating and addressing */
#define MINEISA 1 /* I don't have an EISA Spec to know these ranges, so I */
#define MAXEISA 8 /* Just took my machine's specifications. Adjust to fit. */
/* I just saw an ad, and bumped this from 6 to 8 */
#define SLOTBASE(x) ((x << 12) + 0xc80)
#define SLOTSIZE 0x5c
/* EISA configuration registers & values */
......@@ -152,11 +147,6 @@ struct ecb { /* Enhanced Control Block 6.1 */
#define AHA1740CMD_RINQ 0x0a /* Read Host Adapter Inquiry Data */
#define AHA1740CMD_TARG 0x10 /* Target SCSI Command */
static int aha1740_detect(Scsi_Host_Template *);
static int aha1740_command(Scsi_Cmnd *);
static int aha1740_queuecommand(Scsi_Cmnd *, void (*done) (Scsi_Cmnd *));
static int aha1740_biosparam(struct scsi_device *, struct block_device *, sector_t, int *);
#define AHA1740_ECBS 32
#define AHA1740_SCATTER 16
#define AHA1740_CMDLUN 1
......
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