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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 @@ ...@@ -8,6 +8,7 @@
* *
* This file is aha1740.c, written and * This file is aha1740.c, written and
* Copyright (C) 1992,1993 Brad McLean * Copyright (C) 1992,1993 Brad McLean
* brad@saturn.gaylord.com or brad@bradpc.gaylord.com.
* *
* Modifications to makecode and queuecommand * Modifications to makecode and queuecommand
* for proper handling of multiple devices courteously * for proper handling of multiple devices courteously
...@@ -23,6 +24,9 @@ ...@@ -23,6 +24,9 @@
* *
* Reworked for new_eh and new locking by Alan Cox <alan@redhat.com> * 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 * 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 * is in an open non patent encumbered format. Where cryptographic key signing
* forms part of the process of creating an executable the information * forms part of the process of creating an executable the information
...@@ -39,6 +43,10 @@ ...@@ -39,6 +43,10 @@
#include <linux/ioport.h> #include <linux/ioport.h>
#include <linux/proc_fs.h> #include <linux/proc_fs.h>
#include <linux/stat.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/dma.h>
#include <asm/system.h> #include <asm/system.h>
...@@ -58,494 +66,568 @@ ...@@ -58,494 +66,568 @@
#define DEB(x) #define DEB(x)
#endif #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 { struct aha1740_hostdata {
unsigned int slot; struct eisa_device *edev;
unsigned int translation; unsigned int translation;
unsigned int last_ecb_used; unsigned int last_ecb_used;
struct ecb ecb[AHA1740_ECBS]; 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) #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) */ offset = dma - hdata->ecb_dma_addr;
static struct Scsi_Host * aha_host[8] = {NULL, };
static int aha1740_proc_info(struct Scsi_Host *shpnt, char *buffer, char **start, off_t offset, return (struct ecb *)(((char *) hdata->ecb) + (unsigned int) offset);
int length, int inout) }
static inline dma_addr_t ecb_cpu_to_dma (struct Scsi_Host *host, void *cpu)
{ {
int len; struct aha1740_hostdata *hdata = HOSTDATA (host);
struct aha1740_hostdata *host; dma_addr_t offset;
offset = (char *) cpu - (char *) hdata->ecb;
return hdata->ecb_dma_addr + offset;
}
if (inout) static int aha1740_proc_info(struct Scsi_Host *shpnt, char *buffer,
return-ENOSYS; 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" host = HOSTDATA(shpnt);
"Extended translation %sabled.\n",
shpnt->io_port, shpnt->irq, host->slot,
host->translation ? "en" : "dis");
if (offset > len) { len = sprintf(buffer, "aha174x at IO:%lx, IRQ %d, SLOT %d.\n"
*start = buffer; "Extended translation %sabled.\n",
return 0; shpnt->io_port, shpnt->irq, host->edev->slot,
} host->translation ? "en" : "dis");
*start = buffer + offset; if (offset > len) {
len -= offset; *start = buffer;
if (len > length) return 0;
len = length; }
return len;
*start = buffer + offset;
len -= offset;
if (len > length)
len = length;
return len;
}
static int aha1740_makecode(unchar *sense, unchar *status) static int aha1740_makecode(unchar *sense, unchar *status)
{ {
struct statusword struct statusword
{ {
ushort don:1, /* Command Done - No Error */ ushort don:1, /* Command Done - No Error */
du:1, /* Data underrun */ du:1, /* Data underrun */
:1, qf:1, /* Queue full */ :1, qf:1, /* Queue full */
sc:1, /* Specification Check */ sc:1, /* Specification Check */
dor:1, /* Data overrun */ dor:1, /* Data overrun */
ch:1, /* Chaining Halted */ ch:1, /* Chaining Halted */
intr:1, /* Interrupt issued */ intr:1, /* Interrupt issued */
asa:1, /* Additional Status Available */ asa:1, /* Additional Status Available */
sns:1, /* Sense information Stored */ sns:1, /* Sense information Stored */
:1, ini:1, /* Initialization Required */ :1, ini:1, /* Initialization Required */
me:1, /* Major error or exception */ me:1, /* Major error or exception */
:1, eca:1, /* Extended Contingent alliance */ :1, eca:1, /* Extended Contingent alliance */
:1; :1;
} status_word; } status_word;
int retval = DID_OK; int retval = DID_OK;
status_word = * (struct statusword *) status; status_word = * (struct statusword *) status;
#ifdef DEBUG #ifdef DEBUG
printk("makecode from %x,%x,%x,%x %x,%x,%x,%x", printk("makecode from %x,%x,%x,%x %x,%x,%x,%x",
status[0], status[1], status[2], status[3], status[0], status[1], status[2], status[3],
sense[0], sense[1], sense[2], sense[3]); sense[0], sense[1], sense[2], sense[3]);
#endif #endif
if (!status_word.don) /* Anything abnormal was detected */ if (!status_word.don) { /* Anything abnormal was detected */
{ if ( (status[1]&0x18) || status_word.sc ) {
if ( (status[1]&0x18) || status_word.sc ) /*Additional info available*/ /*Additional info available*/
{ /* Use the supplied info for further diagnostics */
/* Use the supplied info for further diagnostics */ switch ( status[2] ) {
switch ( status[2] ) case 0x12:
{ if ( status_word.dor )
case 0x12: retval=DID_ERROR; /* It's an Overrun */
if ( status_word.dor ) /* If not overrun, assume underrun and
retval=DID_ERROR; /* It's an Overrun */ * ignore it! */
/* If not overrun, assume underrun and ignore it! */ case 0x00: /* No info, assume no error, should
case 0x00: /* No info, assume no error, should not occur */ * not occur */
break; break;
case 0x11: case 0x11:
case 0x21: case 0x21:
retval=DID_TIME_OUT; retval=DID_TIME_OUT;
break; break;
case 0x0a: case 0x0a:
retval=DID_BAD_TARGET; retval=DID_BAD_TARGET;
break; break;
case 0x04: case 0x04:
case 0x05: case 0x05:
retval=DID_ABORT; retval=DID_ABORT;
/* Either by this driver or the AHA1740 itself */ /* Either by this driver or the
break; * AHA1740 itself */
default: break;
retval=DID_ERROR; /* No further diagnostics possible */ default:
} retval=DID_ERROR; /* No further
} * diagnostics
else * possible */
{ /* Michael suggests, and Brad concurs: */ }
if ( status_word.qf ) } else {
{ /* Michael suggests, and Brad concurs: */
retval = DID_TIME_OUT; /* forces a redo */ if ( status_word.qf ) {
/* I think this specific one should not happen -Brad */ retval = DID_TIME_OUT; /* forces a redo */
printk("aha1740.c: WARNING: AHA1740 queue overflow!\n"); /* I think this specific one should
} * not happen -Brad */
else if ( status[0]&0x60 ) printk("aha1740.c: WARNING: AHA1740 queue overflow!\n");
{ } else
retval = DID_ERROR; /* Didn't find a better error */ if ( status[0]&0x60 ) {
} /* Didn't find a better error */
/* In any other case return DID_OK so for example retval = DID_ERROR;
CONDITION_CHECKS make it through to the appropriate }
device driver */ /* 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 */
/* Under all circumstances supply the target status -Michael */ return status[3] | retval << 16;
return status[3] | retval << 16;
} }
static int aha1740_test_port(unsigned int base) static int aha1740_test_port(unsigned int base)
{ {
char name[4], tmp; if ( inb(PORTADR(base)) & PORTADDR_ENH )
return 1; /* Okay, we're all set */
/* 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 */
printk("aha174x: Board detected, but not in enhanced mode, so disabled it.\n"); printk("aha174x: Board detected, but not in enhanced mode, so disabled it.\n");
return 0; return 0;
} }
/* A "high" level interrupt handler */ /* A "high" level interrupt handler */
static irqreturn_t aha1740_intr_handle(int irq, void *dev_id, 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]; struct Scsi_Host *host = (struct Scsi_Host *) dev_id;
void (*my_done)(Scsi_Cmnd *); void (*my_done)(Scsi_Cmnd *);
int errstatus, adapstat; int errstatus, adapstat;
int number_serviced; int number_serviced;
struct ecb *ecbptr; struct ecb *ecbptr;
Scsi_Cmnd *SCtmp; Scsi_Cmnd *SCtmp;
unsigned int base; unsigned int base;
unsigned long flags; unsigned long flags;
int handled = 0; int handled = 0;
struct aha1740_sg *sgptr;
if (!host) struct eisa_device *edev;
panic("aha1740.c: Irq from unknown host!\n");
spin_lock_irqsave(host->host_lock, flags); if (!host)
base = host->io_port; panic("aha1740.c: Irq from unknown host!\n");
number_serviced = 0; spin_lock_irqsave(host->host_lock, flags);
base = host->io_port;
while(inb(G2STAT(base)) & G2STAT_INTPEND) number_serviced = 0;
{ edev = HOSTDATA(host)->edev;
handled = 1;
DEB(printk("aha1740_intr top of loop.\n")); while(inb(G2STAT(base)) & G2STAT_INTPEND) {
adapstat = inb(G2INTST(base)); handled = 1;
ecbptr = (struct ecb *) isa_bus_to_virt(inl(MBOXIN0(base))); DEB(printk("aha1740_intr top of loop.\n"));
outb(G2CNTRL_IRST,G2CNTRL(base)); /* interrupt reset */ adapstat = inb(G2INTST(base));
ecbptr = ecb_dma_to_cpu (host, inl(MBOXIN0(base)));
outb(G2CNTRL_IRST,G2CNTRL(base)); /* interrupt reset */
switch ( adapstat & G2INTST_MASK ) switch ( adapstat & G2INTST_MASK ) {
{ case G2INTST_CCBRETRY:
case G2INTST_CCBRETRY: case G2INTST_CCBERROR:
case G2INTST_CCBERROR: case G2INTST_CCBGOOD:
case G2INTST_CCBGOOD: /* Host Ready -> Mailbox in complete */
/* Host Ready -> Mailbox in complete */ outb(G2CNTRL_HRDY,G2CNTRL(base));
outb(G2CNTRL_HRDY,G2CNTRL(base)); if (!ecbptr) {
if (!ecbptr) printk("Aha1740 null ecbptr in interrupt (%x,%x,%x,%d)\n",
{ inb(G2STAT(base)),adapstat,
printk("Aha1740 null ecbptr in interrupt (%x,%x,%x,%d)\n", inb(G2INTST(base)), number_serviced++);
inb(G2STAT(base)),adapstat, continue;
inb(G2INTST(base)), number_serviced++); }
continue; SCtmp = ecbptr->SCpnt;
} if (!SCtmp) {
SCtmp = ecbptr->SCpnt; printk("Aha1740 null SCtmp in interrupt (%x,%x,%x,%d)\n",
if (!SCtmp) inb(G2STAT(base)),adapstat,
{ inb(G2INTST(base)), number_serviced++);
printk("Aha1740 null SCtmp in interrupt (%x,%x,%x,%d)\n", continue;
inb(G2STAT(base)),adapstat, }
inb(G2INTST(base)), number_serviced++); sgptr = (struct aha1740_sg *) SCtmp->host_scribble;
continue; if (SCtmp->use_sg) {
} /* We used scatter-gather.
if (SCtmp->host_scribble) Do the unmapping dance. */
kfree(SCtmp->host_scribble); dma_unmap_sg (&edev->dev,
/* Fetch the sense data, and tuck it away, in the required slot. (struct scatterlist *) SCtmp->request_buffer,
The Adaptec automatically fetches it, and there is no SCtmp->use_sg,
guarantee that we will still have it in the cdb when we come scsi_to_dma_dir (SCtmp->sc_data_direction));
back */ } else {
if ( (adapstat & G2INTST_MASK) == G2INTST_CCBERROR ) dma_unmap_single (&edev->dev,
{ sgptr->buf_dma_addr,
memcpy(SCtmp->sense_buffer, ecbptr->sense, SCtmp->request_bufflen,
sizeof(SCtmp->sense_buffer)); DMA_BIDIRECTIONAL);
errstatus = aha1740_makecode(ecbptr->sense,ecbptr->status); }
}
else /* Free the sg block */
errstatus = 0; dma_free_coherent (&edev->dev,
DEB(if (errstatus) printk("aha1740_intr_handle: returning %6x\n", sizeof (struct aha1740_sg),
errstatus)); SCtmp->host_scribble,
SCtmp->result = errstatus; sgptr->sg_dma_addr);
my_done = ecbptr->done;
memset(ecbptr,0,sizeof(struct ecb)); /* Fetch the sense data, and tuck it away, in
if ( my_done ) the required slot. The Adaptec
my_done(SCtmp); automatically fetches it, and there is no
break; guarantee that we will still have it in the
case G2INTST_HARDFAIL: cdb when we come back */
printk(KERN_ALERT "aha1740 hardware failure!\n"); if ( (adapstat & G2INTST_MASK) == G2INTST_CCBERROR ) {
panic("aha1740.c"); /* Goodbye */ memcpy(SCtmp->sense_buffer, ecbptr->sense,
case G2INTST_ASNEVENT: sizeof(SCtmp->sense_buffer));
printk("aha1740 asynchronous event: %02x %02x %02x %02x %02x\n", errstatus = aha1740_makecode(ecbptr->sense,ecbptr->status);
adapstat, inb(MBOXIN0(base)), inb(MBOXIN1(base)), } else
inb(MBOXIN2(base)), inb(MBOXIN3(base))); /* Say What? */ errstatus = 0;
/* Host Ready -> Mailbox in complete */ DEB(if (errstatus)
outb(G2CNTRL_HRDY,G2CNTRL(base)); printk("aha1740_intr_handle: returning %6x\n",
break; errstatus));
case G2INTST_CMDGOOD: SCtmp->result = errstatus;
/* set immediate command success flag here: */ my_done = ecbptr->done;
break; memset(ecbptr,0,sizeof(struct ecb));
case G2INTST_CMDERROR: if ( my_done )
/* Set immediate command failure flag here: */ my_done(SCtmp);
break; 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); spin_unlock_irqrestore(host->host_lock, flags);
return IRQ_RETVAL(handled); return IRQ_RETVAL(handled);
} }
static int aha1740_queuecommand(Scsi_Cmnd * SCpnt, void (*done)(Scsi_Cmnd *)) static int aha1740_queuecommand(Scsi_Cmnd * SCpnt, void (*done)(Scsi_Cmnd *))
{ {
unchar direction; unchar direction;
unchar *cmd = (unchar *) SCpnt->cmnd; unchar *cmd = (unchar *) SCpnt->cmnd;
unchar target = SCpnt->device->id; unchar target = SCpnt->device->id;
struct aha1740_hostdata *host = HOSTDATA(SCpnt->device->host); struct aha1740_hostdata *host = HOSTDATA(SCpnt->device->host);
unsigned long flags; unsigned long flags;
void *buff = SCpnt->request_buffer; void *buff = SCpnt->request_buffer;
int bufflen = SCpnt->request_bufflen; int bufflen = SCpnt->request_bufflen;
int ecbno; dma_addr_t sg_dma;
DEB(int i); struct aha1740_sg *sgptr;
int ecbno;
if(*cmd == REQUEST_SENSE) DEB(int i);
{
SCpnt->result = 0; if(*cmd == REQUEST_SENSE) {
done(SCpnt); SCpnt->result = 0;
return 0; done(SCpnt);
} return 0;
}
#ifdef DEBUG #ifdef DEBUG
if (*cmd == READ_10 || *cmd == WRITE_10) if (*cmd == READ_10 || *cmd == WRITE_10)
i = xscsi2int(cmd+2); i = xscsi2int(cmd+2);
else if (*cmd == READ_6 || *cmd == WRITE_6) else if (*cmd == READ_6 || *cmd == WRITE_6)
i = scsi2int(cmd+2); i = scsi2int(cmd+2);
else else
i = -1; i = -1;
printk("aha1740_queuecommand: dev %d cmd %02x pos %d len %d ", printk("aha1740_queuecommand: dev %d cmd %02x pos %d len %d ",
target, *cmd, i, bufflen); target, *cmd, i, bufflen);
printk("scsi cmd:"); printk("scsi cmd:");
for (i = 0; i < SCpnt->cmd_len; i++) printk("%02x ", cmd[i]); for (i = 0; i < SCpnt->cmd_len; i++) printk("%02x ", cmd[i]);
printk("\n"); printk("\n");
#endif #endif
/* locate an available ecb */ /* locate an available ecb */
spin_lock_irqsave(&SCpnt->device->host->host_lock, flags);
spin_lock_irqsave(&aha1740_lock, flags); ecbno = host->last_ecb_used + 1; /* An optimization */
ecbno = host->last_ecb_used + 1; /* An optimization */
if (ecbno >= AHA1740_ECBS)
ecbno = 0;
do {
if (!host->ecb[ecbno].cmdw)
break;
ecbno++;
if (ecbno >= AHA1740_ECBS) if (ecbno >= AHA1740_ECBS)
ecbno = 0; ecbno = 0;
} while (ecbno != host->last_ecb_used); 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) if (host->ecb[ecbno].cmdw)
panic("Unable to find empty ecb for aha1740.\n"); panic("Unable to find empty ecb for aha1740.\n");
host->ecb[ecbno].cmdw = AHA1740CMD_INIT; /* SCSI Initiator Command host->ecb[ecbno].cmdw = AHA1740CMD_INIT; /* SCSI Initiator Command
doubles as reserved flag */ doubles as reserved flag */
host->last_ecb_used = ecbno; host->last_ecb_used = ecbno;
spin_unlock_irqrestore(&aha1740_lock, flags); spin_unlock_irqrestore(&SCpnt->device->host->host_lock, flags);
#ifdef DEBUG #ifdef DEBUG
printk("Sending command (%d %x)...", ecbno, done); printk("Sending command (%d %x)...", ecbno, done);
#endif #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; 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) SCpnt->host_scribble = dma_alloc_coherent (&host->edev->dev,
{ sizeof (struct aha1740_sg),
struct scatterlist * sgpnt; &sg_dma, GFP_ATOMIC);
struct aha1740_chain * cptr; if(SCpnt->host_scribble == NULL) {
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)
{
printk(KERN_WARNING "aha1740: out of memory in queuecommand!\n"); printk(KERN_WARNING "aha1740: out of memory in queuecommand!\n");
return 1; return 1;
} }
sgpnt = (struct scatterlist *) SCpnt->request_buffer; sgptr = (struct aha1740_sg *) SCpnt->host_scribble;
cptr = (struct aha1740_chain *) SCpnt->host_scribble; sgptr->sg_dma_addr = sg_dma;
for(i=0; i<SCpnt->use_sg; i++)
{ if (SCpnt->use_sg) {
cptr[i].datalen = sgpnt[i].length; struct scatterlist * sgpnt;
cptr[i].dataptr = isa_virt_to_bus(page_address(sgpnt[i].page) + sgpnt[i].offset); struct aha1740_chain * cptr;
} int i, count;
host->ecb[ecbno].datalen = SCpnt->use_sg * sizeof(struct aha1740_chain); DEB(unsigned char * ptr);
host->ecb[ecbno].dataptr = isa_virt_to_bus(cptr);
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 #ifdef DEBUG
printk("cptr %x: ",cptr); printk("cptr %x: ",cptr);
ptr = (unsigned char *) cptr; ptr = (unsigned char *) cptr;
for(i=0;i<24;i++) printk("%02x ", ptr[i]); for(i=0;i<24;i++) printk("%02x ", ptr[i]);
#endif #endif
} } else {
else host->ecb[ecbno].datalen = bufflen;
{ sgptr->buf_dma_addr = dma_map_single (&host->edev->dev,
SCpnt->host_scribble = NULL; buff, bufflen,
host->ecb[ecbno].datalen = bufflen; DMA_BIDIRECTIONAL);
host->ecb[ecbno].dataptr = isa_virt_to_bus(buff); host->ecb[ecbno].dataptr = sgptr->buf_dma_addr;
} }
host->ecb[ecbno].lun = SCpnt->device->lun; host->ecb[ecbno].lun = SCpnt->device->lun;
host->ecb[ecbno].ses = 1; /* Suppress underrun errors */ host->ecb[ecbno].ses = 1; /* Suppress underrun errors */
host->ecb[ecbno].dir = direction; host->ecb[ecbno].dir = direction;
host->ecb[ecbno].ars = 1; /* Yes, get the sense on an error */ host->ecb[ecbno].ars = 1; /* Yes, get the sense on an error */
host->ecb[ecbno].senselen = 12; host->ecb[ecbno].senselen = 12;
host->ecb[ecbno].senseptr = isa_virt_to_bus(host->ecb[ecbno].sense); host->ecb[ecbno].senseptr = ecb_cpu_to_dma (SCpnt->device->host,
host->ecb[ecbno].statusptr = isa_virt_to_bus(host->ecb[ecbno].status); host->ecb[ecbno].sense);
host->ecb[ecbno].done = done; host->ecb[ecbno].statusptr = ecb_cpu_to_dma (SCpnt->device->host,
host->ecb[ecbno].SCpnt = SCpnt; host->ecb[ecbno].status);
host->ecb[ecbno].done = done;
host->ecb[ecbno].SCpnt = SCpnt;
#ifdef DEBUG #ifdef DEBUG
{ {
int i; int i;
printk("aha1740_command: sending.. "); printk("aha1740_command: sending.. ");
for (i = 0; i < sizeof(host->ecb[ecbno]) - 10; i++) for (i = 0; i < sizeof(host->ecb[ecbno]) - 10; i++)
printk("%02x ", ((unchar *)&host->ecb[ecbno])[i]); printk("%02x ", ((unchar *)&host->ecb[ecbno])[i]);
} }
printk("\n"); printk("\n");
#endif #endif
if (done) if (done) {
{ /* The Adaptec Spec says the card is so fast that the loops will /* The Adaptec Spec says the card is so fast that the loops
only be executed once in the code below. Even if this was true will only be executed once in the code below. Even if this
with the fastest processors when the spec was written, it doesn't was true with the fastest processors when the spec was
seem to be true with todays fast processors. We print a warning written, it doesn't seem to be true with todays fast
if the code is executed more often than LOOPCNT_WARN. If this processors. We print a warning if the code is executed more
happens, it should be investigated. If the count reaches often than LOOPCNT_WARN. If this happens, it should be
LOOPCNT_MAX, we assume something is broken; since there is no investigated. If the count reaches LOOPCNT_MAX, we assume
way to return an error (the return value is ignored by the something is broken; since there is no way to return an
mid-level scsi layer) we have to panic (and maybe that's the error (the return value is ignored by the mid-level scsi
best thing we can do then anyhow). */ 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_WARN 10 /* excessive mbxout wait -> syslog-msg */
#define LOOPCNT_MAX 1000000 /* mbxout deadlock -> panic() after ~ 2 sec. */ #define LOOPCNT_MAX 1000000 /* mbxout deadlock -> panic() after ~ 2 sec. */
int loopcnt; int loopcnt;
unsigned int base = SCpnt->device->host->io_port; unsigned int base = SCpnt->device->host->io_port;
DEB(printk("aha1740[%d] critical section\n",ecbno)); DEB(printk("aha1740[%d] critical section\n",ecbno));
spin_lock_irqsave(&aha1740_lock, flags); spin_lock_irqsave(&SCpnt->device->host->host_lock, flags);
for (loopcnt = 0; ; loopcnt++) { for (loopcnt = 0; ; loopcnt++) {
if (inb(G2STAT(base)) & G2STAT_MBXOUT) break; if (inb(G2STAT(base)) & G2STAT_MBXOUT) break;
if (loopcnt == LOOPCNT_WARN) { if (loopcnt == LOOPCNT_WARN) {
printk("aha1740[%d]_mbxout wait!\n",ecbno); printk("aha1740[%d]_mbxout wait!\n",ecbno);
} }
if (loopcnt == LOOPCNT_MAX) if (loopcnt == LOOPCNT_MAX)
panic("aha1740.c: mbxout busy!\n"); panic("aha1740.c: mbxout busy!\n");
} }
outl(isa_virt_to_bus(host->ecb + ecbno), MBOXOUT0(base)); outl (ecb_cpu_to_dma (SCpnt->device->host, host->ecb + ecbno),
for (loopcnt = 0; ; loopcnt++) { MBOXOUT0(base));
if (! (inb(G2STAT(base)) & G2STAT_BUSY)) break; for (loopcnt = 0; ; loopcnt++) {
if (loopcnt == LOOPCNT_WARN) { if (! (inb(G2STAT(base)) & G2STAT_BUSY)) break;
printk("aha1740[%d]_attn wait!\n",ecbno); if (loopcnt == LOOPCNT_WARN) {
} printk("aha1740[%d]_attn wait!\n",ecbno);
if (loopcnt == LOOPCNT_MAX) }
panic("aha1740.c: attn wait failed!\n"); 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); outb(ATTN_START | (target & 7), ATTN(base)); /* Start it up */
DEB(printk("aha1740[%d] request queued.\n",ecbno)); spin_unlock_irqrestore(&SCpnt->device->host->host_lock, flags);
} DEB(printk("aha1740[%d] request queued.\n",ecbno));
else } else
printk(KERN_ALERT "aha1740_queuecommand: done can't be NULL\n"); printk(KERN_ALERT "aha1740_queuecommand: done can't be NULL\n");
return 0; return 0;
} }
static void internal_done(Scsi_Cmnd * SCpnt) static void internal_done(Scsi_Cmnd * SCpnt)
{ {
SCpnt->SCp.Status++; SCpnt->SCp.Status++;
} }
static int aha1740_command(Scsi_Cmnd * SCpnt) static int aha1740_command(Scsi_Cmnd * SCpnt)
{ {
aha1740_queuecommand(SCpnt, internal_done); aha1740_queuecommand(SCpnt, internal_done);
SCpnt->SCp.Status = 0; SCpnt->SCp.Status = 0;
while (!SCpnt->SCp.Status) while (!SCpnt->SCp.Status)
{ {
cpu_relax(); cpu_relax();
barrier(); barrier();
} }
return SCpnt->result; return SCpnt->result;
} }
/* Query the board for its irq_level. Nothing else matters /* Query the board for its irq_level. Nothing else matters
in enhanced mode on an EISA bus. */ in enhanced mode on an EISA bus. */
static void aha1740_getconfig(unsigned int base, unsigned int *irq_level, 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]; *irq_level = intab[inb(INTDEF(base)) & 0x7];
*translation = inb(RESV1(base)) & 0x1; *translation = inb(RESV1(base)) & 0x1;
outb(inb(INTDEF(base)) | 0x10, INTDEF(base)); 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; int slotbase;
unsigned int irq_level, translation; unsigned int irq_level, translation;
struct Scsi_Host *shpnt; struct Scsi_Host *shpnt;
struct aha1740_hostdata *host; struct aha1740_hostdata *host;
slotbase = SLOTBASE(slot); struct eisa_device *edev = to_eisa_device (dev);
/*
* The ioports for eisa boards are generally beyond that used in the DEB(printk("aha1740_probe: \n"));
* check/allocate region code, but this may change at some point,
* so we go through the motions. slotbase = edev->base_addr + EISA_VENDOR_ID_OFFSET;
*/ if (!request_region(slotbase, SLOTSIZE, "aha1740")) /* See if in use */
if (!request_region(slotbase, SLOTSIZE, "aha1740")) /* See if in use */ return -EBUSY;
continue;
if (!aha1740_test_port(slotbase)) if (!aha1740_test_port(slotbase))
goto err_release; goto err_release;
aha1740_getconfig(slotbase,&irq_level,&translation); aha1740_getconfig(slotbase,&irq_level,&translation);
if ((inb(G2STAT(slotbase)) & if ((inb(G2STAT(slotbase)) &
(G2STAT_MBXOUT|G2STAT_BUSY)) != G2STAT_MBXOUT) (G2STAT_MBXOUT|G2STAT_BUSY)) != G2STAT_MBXOUT) {
{ /* If the card isn't ready, hard reset it */ /* If the card isn't ready, hard reset it */
outb(G2CNTRL_HRST, G2CNTRL(slotbase)); outb(G2CNTRL_HRST, G2CNTRL(slotbase));
outb(0, 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", printk(KERN_INFO "aha174x: Extended translation %sabled.\n",
translation ? "en" : "dis"); translation ? "en" : "dis");
DEB(printk("aha1740_detect: enable interrupt channel %d\n",irq_level)); shpnt = scsi_register(&aha1740_template,
if (request_irq(irq_level,aha1740_intr_handle,0,"aha1740",NULL)) { sizeof(struct aha1740_hostdata));
printk("Unable to allocate IRQ for adaptec controller.\n");
goto err_release;
}
shpnt = scsi_register(tpnt, sizeof(struct aha1740_hostdata));
if(shpnt == NULL) if(shpnt == NULL)
goto err_free_irq; goto err_release;
shpnt->base = 0; shpnt->base = 0;
shpnt->io_port = slotbase; shpnt->io_port = slotbase;
...@@ -553,60 +635,80 @@ static int aha1740_detect(Scsi_Host_Template * tpnt) ...@@ -553,60 +635,80 @@ static int aha1740_detect(Scsi_Host_Template * tpnt)
shpnt->irq = irq_level; shpnt->irq = irq_level;
shpnt->dma_channel = 0xff; shpnt->dma_channel = 0xff;
host = HOSTDATA(shpnt); host = HOSTDATA(shpnt);
host->slot = slot; host->edev = edev;
host->translation = translation; host->translation = translation;
aha_host[irq_level - 9] = shpnt; host->ecb_dma_addr = dma_map_single (&edev->dev, host->ecb,
count++; sizeof (host->ecb),
continue; 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: err_release:
free_irq(irq_level, aha1740_intr_handle);
err_release:
release_region(slotbase, SLOTSIZE); release_region(slotbase, SLOTSIZE);
}
return count; return -ENODEV;
} }
static int aha1740_biosparam(struct scsi_device *sdev, struct block_device *dev, static __devexit int aha1740_remove (struct device *dev)
sector_t capacity, int* ip)
{ {
int size = capacity; struct Scsi_Host *shpnt = dev->driver_data;
int extended = HOSTDATA(sdev->host)->translation; struct aha1740_hostdata *host = HOSTDATA (shpnt);
DEB(printk("aha1740_biosparam\n")); if (scsi_remove_host (shpnt))
if (extended && (ip[2] > 1024)) return -EBUSY;
{
ip[0] = 255; free_irq (shpnt->irq, shpnt);
ip[1] = 63; dma_unmap_single (dev, host->ecb_dma_addr,
ip[2] = size / (255 * 63); sizeof (host->ecb), DMA_BIDIRECTIONAL);
} release_region (shpnt->io_port, SLOTSIZE);
else
{ scsi_unregister (shpnt);
ip[0] = 64;
ip[1] = 32; return 0;
ip[2] = size >> 11;
}
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 = { static struct eisa_driver aha1740_driver = {
.proc_name = "aha1740", .id_table = aha1740_ids,
.proc_info = aha1740_proc_info, .driver = {
.name = "Adaptec 174x (EISA)", .name = "aha1740",
.detect = aha1740_detect, .probe = aha1740_probe,
.command = aha1740_command, .remove = __devexit_p (aha1740_remove),
.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,
}; };
#include "scsi_module.c"
/* Okay, you made it all the way through. As of this writing, 3/31/93, I'm static __init int aha1740_init (void)
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! */ 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 @@ ...@@ -12,11 +12,6 @@
#include <linux/types.h> #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 #define SLOTSIZE 0x5c
/* EISA configuration registers & values */ /* EISA configuration registers & values */
...@@ -152,11 +147,6 @@ struct ecb { /* Enhanced Control Block 6.1 */ ...@@ -152,11 +147,6 @@ struct ecb { /* Enhanced Control Block 6.1 */
#define AHA1740CMD_RINQ 0x0a /* Read Host Adapter Inquiry Data */ #define AHA1740CMD_RINQ 0x0a /* Read Host Adapter Inquiry Data */
#define AHA1740CMD_TARG 0x10 /* Target SCSI Command */ #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_ECBS 32
#define AHA1740_SCATTER 16 #define AHA1740_SCATTER 16
#define AHA1740_CMDLUN 1 #define AHA1740_CMDLUN 1
......
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