/* $Id$
* 1993 / 03 / 31
* linux / kernel / aha1740 . c
*
* Based loosely on aha1542 . c which is
* Copyright ( C ) 1992 Tommy Thorn and
* Modified by Eric Youngdale
*
* 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
* provided by Michael Weller , March , 1993
*
* Multiple adapter support , extended translation detection ,
* update to current scsi subsystem changes , proc fs support ,
* working ( ! ) module support based on patches from Andreas Arens ,
* by Andreas Degert < ad @ papyrus . hamburg . com > , 2 / 1997
*
* aha1740_makecode may still need even more work
* if it doesn ' t work for your devices , take a look .
*
* Reworked for new_eh and new locking by Alan Cox < alan @ lxorguk . ukuu . org . uk >
*
* Converted to EISA and generic DMA APIs by Marc Zyngier
* < maz @ wild - wind . fr . eu . org > , 4 / 2003 .
*
* Shared interrupt support added by Rask Ingemann Lambertsen
* < rask @ sygehus . dk > , 10 / 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
* including keys needed to generate an equivalently functional executable
* are deemed to be part of the source code .
*/
#include <linux/blkdev.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/string.h>
#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 <linux/gfp.h>
#include <asm /dma.h>
#include <asm /io.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_eh.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
#include "aha1740.h"
/* IF YOU ARE HAVING PROBLEMS WITH THIS DRIVER, AND WANT TO WATCH
IT WORK , THEN :
# define DEBUG
*/
#ifdef DEBUG
#define DEB(x) x
#else
#define DEB(x)
#endif
struct aha1740_hostdata {
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 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;
offset = dma - hdata->ecb_dma_addr;
return (struct ecb *)(((char *) hdata->ecb) + (unsigned int ) offset);
}
static inline dma_addr_t ecb_cpu_to_dma (struct Scsi_Host *host, void *cpu)
{
struct aha1740_hostdata *hdata = HOSTDATA (host);
dma_addr_t offset;
offset = (char *) cpu - (char *) hdata->ecb;
return hdata->ecb_dma_addr + offset;
}
static int aha1740_show_info(struct seq_file *m, struct Scsi_Host *shpnt)
{
struct aha1740_hostdata *host = HOSTDATA(shpnt);
seq_printf(m, "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" );
return 0 ;
}
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;
#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 ]);
#endif
if (!status_word.don) { /* Anything abnormal was detected */
if ( (status[1 ]&0 x18) || status_word.sc ) {
/*Additional info available*/
/* Use the supplied info for further diagnostics */
switch ( status[2 ] ) {
case 0 x12:
if ( status_word.dor )
retval=DID_ERROR; /* It's an Overrun */
/* If not overrun, assume underrun and
* ignore it! */
break ;
case 0 x00: /* No info, assume no error, should
* not occur */
break ;
case 0 x11:
case 0 x21:
retval=DID_TIME_OUT;
break ;
case 0 x0a:
retval=DID_BAD_TARGET;
break ;
case 0 x04:
case 0 x05:
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 ]&0 x60 ) {
/* 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 ;
}
static int aha1740_test_port(unsigned int base)
{
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 ;
}
/* A "high" level interrupt handler */
static irqreturn_t aha1740_intr_handle(int irq, void *dev_id)
{
struct Scsi_Host *host = (struct Scsi_Host *) dev_id;
void (*my_done)(struct scsi_cmnd *);
int errstatus, adapstat;
int number_serviced;
struct ecb *ecbptr;
struct 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 ;
}
sgptr = (struct aha1740_sg *) SCtmp->host_scribble;
scsi_dma_unmap(SCtmp);
/* 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_and_pad(SCtmp->sense_buffer,
SCSI_SENSE_BUFFERSIZE,
ecbptr->sense,
sizeof (ecbptr->sense),
0 );
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++;
}
spin_unlock_irqrestore(host->host_lock, flags);
return IRQ_RETVAL(handled);
}
static int aha1740_queuecommand_lck(struct scsi_cmnd *SCpnt)
{
void (*done)(struct scsi_cmnd *) = scsi_done;
unchar direction;
unchar *cmd = (unchar *) SCpnt->cmnd;
unchar target = scmd_id(SCpnt);
struct aha1740_hostdata *host = HOSTDATA(SCpnt->device->host);
unsigned long flags;
dma_addr_t sg_dma;
struct aha1740_sg *sgptr;
int ecbno, nseg;
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" );
#endif
/* 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 ;
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" );
host->ecb[ecbno].cmdw = AHA1740CMD_INIT; /* SCSI Initiator Command
doubles as reserved flag */
host->last_ecb_used = ecbno;
spin_unlock_irqrestore(SCpnt->device->host->host_lock, flags);
#ifdef DEBUG
printk("Sending command (%d %x)..." , ecbno, done);
#endif
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 ;
memcpy(host->ecb[ecbno].cdb, cmd, SCpnt->cmd_len);
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 ;
}
sgptr = (struct aha1740_sg *) SCpnt->host_scribble;
sgptr->sg_dma_addr = sg_dma;
nseg = scsi_dma_map(SCpnt);
BUG_ON(nseg < 0 );
if (nseg) {
struct scatterlist *sg;
struct aha1740_chain * cptr;
int i;
DEB(unsigned char * ptr);
host->ecb[ecbno].sg = 1 ; /* SCSI Initiator Command
* w/scatter-gather*/
cptr = sgptr->sg_chain;
scsi_for_each_sg(SCpnt, sg, nseg, i) {
cptr[i].datalen = sg_dma_len (sg);
cptr[i].dataptr = sg_dma_address (sg);
}
host->ecb[ecbno].datalen = nseg * 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]);
#endif
} else {
host->ecb[ecbno].datalen = 0 ;
host->ecb[ecbno].dataptr = 0 ;
}
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" );
#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 today ' s 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(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 DEF_SCSI_QCMD(aha1740_queuecommand)
/* Query the board for its irq_level and irq_type. Nothing else matters
in enhanced mode on an EISA bus. */
static void aha1740_getconfig(unsigned int base, unsigned int *irq_level,
unsigned int *irq_type,
unsigned int *translation)
{
static int intab[] = { 9 , 10 , 11 , 12 , 0 , 14 , 15 , 0 };
*irq_level = intab[inb(INTDEF(base)) & 0 x7];
*irq_type = (inb(INTDEF(base)) & 0 x8) >> 3 ;
*translation = inb(RESV1(base)) & 0 x1;
outb(inb(INTDEF(base)) | 0 x10, 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_eh_abort_handler (struct scsi_cmnd *dummy)
{
/*
* 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 . . .
*/
return SUCCESS;
}
static const struct scsi_host_template aha1740_template = {
.module = THIS_MODULE,
.proc_name = "aha1740" ,
.show_info = aha1740_show_info,
.name = "Adaptec 174x (EISA)" ,
.queuecommand = aha1740_queuecommand,
.bios_param = aha1740_biosparam,
.can_queue = AHA1740_ECBS,
.this_id = 7 ,
.sg_tablesize = AHA1740_SCATTER,
.eh_abort_handler = aha1740_eh_abort_handler,
};
static int aha1740_probe (struct device *dev)
{
int slotbase, rc;
unsigned int irq_level, irq_type, translation;
struct Scsi_Host *shpnt;
struct aha1740_hostdata *host;
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_region;
aha1740_getconfig(slotbase,&irq_level,&irq_type,&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));
}
printk(KERN_INFO "Configuring slot %d at IO:%x, IRQ %u (%s)\n" ,
edev->slot, slotbase, irq_level, irq_type ? "edge" : "level" );
printk(KERN_INFO "aha174x: Extended translation %sabled.\n" ,
translation ? "en" : "dis" );
shpnt = scsi_host_alloc(&aha1740_template,
sizeof (struct aha1740_hostdata));
if (shpnt == NULL)
goto err_release_region;
shpnt->base = 0 ;
shpnt->io_port = slotbase;
shpnt->n_io_port = SLOTSIZE;
shpnt->irq = irq_level;
shpnt->dma_channel = 0 xff;
host = HOSTDATA(shpnt);
host->edev = edev;
host->translation = translation;
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" );
goto err_host_put;
}
DEB(printk("aha1740_probe: enable interrupt channel %d\n" ,irq_level));
if (request_irq(irq_level,aha1740_intr_handle,irq_type ? 0 : IRQF_SHARED,
"aha1740" ,shpnt)) {
printk(KERN_ERR "aha1740_probe: Unable to allocate IRQ %d.\n" ,
irq_level);
goto err_unmap;
}
eisa_set_drvdata (edev, shpnt);
rc = scsi_add_host (shpnt, dev);
if (rc)
goto err_irq;
scsi_scan_host (shpnt);
return 0 ;
err_irq:
free_irq(irq_level, shpnt);
err_unmap:
dma_unmap_single (&edev->dev, host->ecb_dma_addr,
sizeof (host->ecb), DMA_BIDIRECTIONAL);
err_host_put:
scsi_host_put (shpnt);
err_release_region:
release_region(slotbase, SLOTSIZE);
return -ENODEV;
}
static int aha1740_remove (struct device *dev)
{
struct Scsi_Host *shpnt = dev_get_drvdata(dev);
struct aha1740_hostdata *host = HOSTDATA (shpnt);
scsi_remove_host(shpnt);
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_host_put (shpnt);
return 0 ;
}
static struct eisa_device_id aha1740_ids[] = {
{ "ADP0000" }, /* 1740 */
{ "ADP0001" }, /* 1740A */
{ "ADP0002" }, /* 1742A */
{ "ADP0400" }, /* 1744 */
{ "" }
};
MODULE_DEVICE_TABLE(eisa, aha1740_ids);
static struct eisa_driver aha1740_driver = {
.id_table = aha1740_ids,
.driver = {
.name = "aha1740" ,
.probe = aha1740_probe,
.remove = aha1740_remove,
},
};
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_DESCRIPTION("Adaptec AHA1740 SCSI host adapter driver" );
MODULE_LICENSE("GPL" );
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