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freebsd/sys/i386/isa/aha1742.c
Bruce Evans 2e69f359d1 Fix benign type mismatches in isa interrupt handlers. Many returned int 
instead of void.
1995-09-19 18:55:37 +00:00

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/*
* Written by Julian Elischer (julian@tfs.com)
* for TRW Financial Systems for use under the MACH(2.5) operating system.
*
* TRW Financial Systems, in accordance with their agreement with Carnegie
* Mellon University, makes this software available to CMU to distribute
* or use in any manner that they see fit as long as this message is kept with
* the software. For this reason TFS also grants any other persons or
* organisations permission to use or modify this software.
*
* TFS supplies this software to be publicly redistributed
* on the understanding that TFS is not responsible for the correct
* functioning of this software in any circumstances.
*
* commenced: Sun Sep 27 18:14:01 PDT 1992
*
* $Id: aha1742.c,v 1.36 1995/08/23 23:02:24 gibbs Exp $
*/
#include <sys/types.h>
#ifdef KERNEL /* don't laugh, it compiles as a program too.. look */
#include "ahb.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/malloc.h>
#include <sys/buf.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <machine/clock.h>
#include <i386/isa/isa.h>
#include <i386/isa/isa_device.h>
#else
#define NAHB 1
#endif /*KERNEL */
#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>
#include <sys/devconf.h>
/* */
#ifdef KERNEL
# ifdef DDB
#define fatal_if_no_DDB()
# else
#define fatal_if_no_DDB() panic("panic for historical reasons")
# endif
#endif
typedef unsigned long int physaddr;
#include <sys/kernel.h>
#define KVTOPHYS(x) vtophys(x)
#define AHB_ECB_MAX 32 /* store up to 32ECBs at any one time */
/* in aha1742 H/W ( Not MAX ? ) */
#define ECB_HASH_SIZE 32 /* when we have a physical addr. for */
/* a ecb and need to find the ecb in */
/* space, look it up in the hash table */
#define ECB_HASH_SHIFT 9 /* only hash on multiples of 512 */
#define ECB_HASH(x) ((((long int)(x))>>ECB_HASH_SHIFT) % ECB_HASH_SIZE)
#define AHB_NSEG 33 /* number of dma segments supported */
/*
* AHA1740 standard EISA Host ID regs (Offset from slot base)
*/
#define HID0 0xC80 /* 0,1: msb of ID2, 3-7: ID1 */
#define HID1 0xC81 /* 0-4: ID3, 4-7: LSB ID2 */
#define HID2 0xC82 /* product, 0=174[20] 1 = 1744 */
#define HID3 0xC83 /* firmware revision */
#define CHAR1(B1,B2) (((B1>>2) & 0x1F) | '@')
#define CHAR2(B1,B2) (((B1<<3) & 0x18) | ((B2>>5) & 0x7)|'@')
#define CHAR3(B1,B2) ((B2 & 0x1F) | '@')
/* AHA1740 EISA board control registers (Offset from slot base) */
#define EBCTRL 0xC84
#define CDEN 0x01
/*
* AHA1740 EISA board mode registers (Offset from slot base)
*/
#define PORTADDR 0xCC0
#define PORTADDR_ENHANCED 0x80
#define BIOSADDR 0xCC1
#define INTDEF 0xCC2
#define SCSIDEF 0xCC3
#define BUSDEF 0xCC4
#define RESV0 0xCC5
#define RESV1 0xCC6
#define RESV2 0xCC7
/**** bit definitions for INTDEF ****/
#define INT9 0x00
#define INT10 0x01
#define INT11 0x02
#define INT12 0x03
#define INT14 0x05
#define INT15 0x06
#define INTHIGH 0x08 /* int high=ACTIVE (else edge) */
#define INTEN 0x10
/**** bit definitions for SCSIDEF ****/
#define HSCSIID 0x0F /* our SCSI ID */
#define RSTPWR 0x10 /* reset scsi bus on power up or reset */
/**** bit definitions for BUSDEF ****/
#define B0uS 0x00 /* give up bus immediatly */
#define B4uS 0x01 /* delay 4uSec. */
#define B8uS 0x02
/*
* AHA1740 ENHANCED mode mailbox control regs (Offset from slot base)
*/
#define MBOXOUT0 0xCD0
#define MBOXOUT1 0xCD1
#define MBOXOUT2 0xCD2
#define MBOXOUT3 0xCD3
#define ATTN 0xCD4
#define G2CNTRL 0xCD5
#define G2INTST 0xCD6
#define G2STAT 0xCD7
#define MBOXIN0 0xCD8
#define MBOXIN1 0xCD9
#define MBOXIN2 0xCDA
#define MBOXIN3 0xCDB
#define G2STAT2 0xCDC
/*
* Bit definitions for the 5 control/status registers
*/
#define ATTN_TARGET 0x0F
#define ATTN_OPCODE 0xF0
#define OP_IMMED 0x10
#define AHB_TARG_RESET 0x80
#define OP_START_ECB 0x40
#define OP_ABORT_ECB 0x50
#define G2CNTRL_SET_HOST_READY 0x20
#define G2CNTRL_CLEAR_EISA_INT 0x40
#define G2CNTRL_HARD_RESET 0x80
#define G2INTST_TARGET 0x0F
#define G2INTST_INT_STAT 0xF0
#define AHB_ECB_OK 0x10
#define AHB_ECB_RECOVERED 0x50
#define AHB_HW_ERR 0x70
#define AHB_IMMED_OK 0xA0
#define AHB_ECB_ERR 0xC0
#define AHB_ASN 0xD0 /* for target mode */
#define AHB_IMMED_ERR 0xE0
#define G2STAT_BUSY 0x01
#define G2STAT_INT_PEND 0x02
#define G2STAT_MBOX_EMPTY 0x04
#define G2STAT2_HOST_READY 0x01
struct ahb_dma_seg {
physaddr addr;
long len;
};
struct ahb_ecb_status {
u_short status;
#define ST_DON 0x0001
#define ST_DU 0x0002
#define ST_QF 0x0008
#define ST_SC 0x0010
#define ST_DO 0x0020
#define ST_CH 0x0040
#define ST_INT 0x0080
#define ST_ASA 0x0100
#define ST_SNS 0x0200
#define ST_INI 0x0800
#define ST_ME 0x1000
#define ST_ECA 0x4000
u_char ha_status;
#define HS_OK 0x00
#define HS_CMD_ABORTED_HOST 0x04
#define HS_CMD_ABORTED_ADAPTER 0x05
#define HS_TIMED_OUT 0x11
#define HS_HARDWARE_ERR 0x20
#define HS_SCSI_RESET_ADAPTER 0x22
#define HS_SCSI_RESET_INCOMING 0x23
u_char targ_status;
#define TS_OK 0x00
#define TS_CHECK_CONDITION 0x02
#define TS_BUSY 0x08
u_long resid_count;
u_long resid_addr;
u_short addit_status;
u_char sense_len;
u_char unused[9];
u_char cdb[6];
};
struct ecb {
u_char opcode;
#define ECB_SCSI_OP 0x01
u_char:4;
u_char options:3;
u_char:1;
short opt1;
#define ECB_CNE 0x0001
#define ECB_DI 0x0080
#define ECB_SES 0x0400
#define ECB_S_G 0x1000
#define ECB_DSB 0x4000
#define ECB_ARS 0x8000
short opt2;
#define ECB_LUN 0x0007
#define ECB_TAG 0x0008
#define ECB_TT 0x0030
#define ECB_ND 0x0040
#define ECB_DAT 0x0100
#define ECB_DIR 0x0200
#define ECB_ST 0x0400
#define ECB_CHK 0x0800
#define ECB_REC 0x4000
#define ECB_NRB 0x8000
u_short unused1;
physaddr data;
u_long datalen;
physaddr status;
physaddr chain;
short unused2;
short unused3;
physaddr sense;
u_char senselen;
u_char cdblen;
short cksum;
u_char cdb[12];
/*-----------------end of hardware supported fields----------------*/
struct ecb *next; /* in free list */
struct scsi_xfer *xs; /* the scsi_xfer for this cmd */
int flags;
#define ECB_FREE 0
#define ECB_ACTIVE 1
#define ECB_ABORTED 2
#define ECB_IMMED 4
#define ECB_IMMED_FAIL 8
struct ahb_dma_seg ahb_dma[AHB_NSEG];
struct ahb_ecb_status ecb_status;
struct scsi_sense_data ecb_sense;
struct ecb *nexthash;
physaddr hashkey; /* physaddr of this struct */
};
struct ahb_data {
int flags;
#define AHB_INIT 0x01;
int baseport;
struct ecb *ecbhash[ECB_HASH_SIZE];
struct ecb *free_ecb;
int our_id; /* our scsi id */
int vect;
struct ecb *immed_ecb; /* an outstanding immediete command */
struct scsi_link sc_link;
int numecbs;
} *ahbdata[NAHB];
int ahbprobe();
int ahbprobe1 __P((struct isa_device *dev));
int ahb_attach();
int ahb_init __P((int unit));
inthand2_t ahbintr;
int32 ahb_scsi_cmd();
timeout_t ahb_timeout;
void ahb_done();
static struct ecb *cheat;
void ahb_free_ecb();
void ahbminphys();
struct ecb *ahb_ecb_phys_kv();
u_int32 ahb_adapter_info();
#define EISA_MAX_SLOTS 16 /* XXX This should go into a comon header */
static ahb_slot = 0; /* slot last board was found in */
static ahb_unit = 0;
int ahb_debug = 0;
#define AHB_SHOWECBS 0x01
#define AHB_SHOWINTS 0x02
#define AHB_SHOWCMDS 0x04
#define AHB_SHOWMISC 0x08
#define FAIL 1
#define SUCCESS 0
#define PAGESIZ 4096
#ifdef KERNEL
struct isa_driver ahbdriver =
{
ahbprobe,
ahb_attach,
"ahb"
};
struct scsi_adapter ahb_switch =
{
ahb_scsi_cmd,
ahbminphys,
0,
0,
ahb_adapter_info,
"ahb",
{ 0, 0 }
};
/* the below structure is so we have a default dev struct for our link struct */
struct scsi_device ahb_dev =
{
NULL, /* Use default error handler */
NULL, /* have a queue, served by this */
NULL, /* have no async handler */
NULL, /* Use default 'done' routine */
"ahb",
0,
{ 0, 0 }
};
static struct kern_devconf kdc_ahb[NAHB] = { {
0, 0, 0, /* filled in by dev_attach */
"ahb", 0, { MDDT_ISA, 0, "bio" },
isa_generic_externalize, 0, 0, ISA_EXTERNALLEN,
&kdc_isa0, /* parent */
0, /* parentdata */
DC_UNCONFIGURED, /* always start out here in probe */
"Adaptec 174x-series SCSI host adapter",
DC_CLS_MISC /* host adapters aren't special */
} };
static inline void
ahb_registerdev(struct isa_device *id)
{
if(id->id_unit)
kdc_ahb[id->id_unit] = kdc_ahb[0];
kdc_ahb[id->id_unit].kdc_unit = id->id_unit;
kdc_ahb[id->id_unit].kdc_parentdata = id;
dev_attach(&kdc_ahb[id->id_unit]);
}
#endif /*KERNEL */
#ifndef KERNEL
main()
{
printf("ahb_data size is %d\n", sizeof(struct ahb_data));
printf("ecb size is %d\n", sizeof(struct ecb));
}
#else /*KERNEL */
/*
* Function to send a command out through a mailbox
*/
void
ahb_send_mbox(int unit, int opcode, int target, struct ecb *ecb)
{
int port = ahbdata[unit]->baseport;
int wait = 300; /* 3ms should be enough */
int stport = port + G2STAT;
int s = splbio();
while (--wait) {
if ((inb(stport) & (G2STAT_BUSY | G2STAT_MBOX_EMPTY))
== (G2STAT_MBOX_EMPTY))
break;
DELAY(10);
}
if (wait == 0) {
printf("ahb%d: board not responding\n", unit);
Debugger("aha1742");
fatal_if_no_DDB();
}
outl(port + MBOXOUT0, KVTOPHYS(ecb)); /* don't know this will work */
outb(port + ATTN, opcode | target);
splx(s);
}
/*
* Function to poll for command completion when in poll mode
*/
int
ahb_poll(int unit, int wait)
{ /* in msec */
struct ahb_data *ahb = ahbdata[unit];
int port = ahb->baseport;
int stport = port + G2STAT;
retry:
while (--wait) {
if (inb(stport) & G2STAT_INT_PEND)
break;
DELAY(1000);
} if (wait == 0) {
printf("ahb%d: board not responding\n", unit);
return (EIO);
}
if (cheat != ahb_ecb_phys_kv(ahb, inl(port + MBOXIN0))) {
printf("discarding 0x%lx ", inl(port + MBOXIN0));
outb(port + G2CNTRL, G2CNTRL_CLEAR_EISA_INT);
DELAY(50000);
goto retry;
}
/* don't know this will work */
ahbintr(unit);
return (0);
}
/*
* Function to send an immediate type command to the adapter
*/
void
ahb_send_immed(int unit, int target, u_long cmd)
{
int port = ahbdata[unit]->baseport;
int s = splbio();
int stport = port + G2STAT;
int wait = 100; /* 1 ms enough? */
while (--wait) {
if ((inb(stport) & (G2STAT_BUSY | G2STAT_MBOX_EMPTY))
== (G2STAT_MBOX_EMPTY))
break;
DELAY(10);
} if (wait == 0) {
printf("ahb%d: board not responding\n", unit);
Debugger("aha1742");
fatal_if_no_DDB();
}
outl(port + MBOXOUT0, cmd); /* don't know this will work */
outb(port + G2CNTRL, G2CNTRL_SET_HOST_READY);
outb(port + ATTN, OP_IMMED | target);
splx(s);
}
/*
* Check the slots looking for a board we recognise
* If we find one, note it's address (slot) and call
* the actual probe routine to check it out.
*/
int
ahbprobe(dev)
struct isa_device *dev;
{
int port;
u_char byte1, byte2, byte3;
ahb_slot++;
while (ahb_slot < EISA_MAX_SLOTS) {
port = 0x1000 * ahb_slot;
byte1 = inb(port + HID0);
byte2 = inb(port + HID1);
byte3 = inb(port + HID2);
if (byte1 == 0xff) {
ahb_slot++;
continue;
}
if ((CHAR1(byte1, byte2) == 'A')
&& (CHAR2(byte1, byte2) == 'D')
&& (CHAR3(byte1, byte2) == 'P')
&& ((byte3 == 0) || (byte3 == 1))) {
dev->id_iobase = port;
return ahbprobe1(dev);
}
ahb_slot++;
}
return 0;
}
/*
* Check if the device can be found at the port given
* and if so, set it up ready for further work
* as an argument, takes the isa_device structure from
* autoconf.c.
*/
int
ahbprobe1(dev)
struct isa_device *dev;
{
/*
* find unit and check we have that many defined
*/
int unit = ahb_unit;
struct ahb_data *ahb;
if (unit >= NAHB) {
printf("ahb: unit number (%d) too high\n", unit);
return 0;
}
dev->id_unit = unit;
/*
* Allocate a storage area for us
*/
if (ahbdata[unit]) {
printf("ahb%d: memory already allocated\n", unit);
return 0;
}
ahb = malloc(sizeof(struct ahb_data), M_TEMP, M_NOWAIT);
if (!ahb) {
printf("ahb%d: cannot malloc!\n", unit);
return 0;
}
bzero(ahb, sizeof(struct ahb_data));
ahbdata[unit] = ahb;
ahb->baseport = dev->id_iobase;
#ifndef DEV_LKM
ahb_registerdev(dev);
#endif /* DEV_LKM */
/*
* Try initialise a unit at this location
* sets up dma and bus speed, loads ahb->vect
*/
if (ahb_init(unit) != 0) {
ahbdata[unit] = NULL;
free(ahb, M_TEMP);
return (0);
}
/*
* If it's there, put in it's interrupt vectors
*/
dev->id_irq = (1 << ahb->vect);
dev->id_drq = -1; /* use EISA dma */
ahb_unit++;
return IO_EISASIZE;
}
/*
* Attach all the sub-devices we can find
*/
int
ahb_attach(dev)
struct isa_device *dev;
{
int unit = dev->id_unit;
struct ahb_data *ahb = ahbdata[unit];
struct scsibus_data *scbus;
/*
* fill in the prototype scsi_link.
*/
ahb->sc_link.adapter_unit = unit;
ahb->sc_link.adapter_targ = ahb->our_id;
ahb->sc_link.adapter = &ahb_switch;
ahb->sc_link.device = &ahb_dev;
/*
* Prepare the scsibus_data area for the upperlevel
* scsi code.
*/
scbus = scsi_alloc_bus();
if(!scbus)
return 0;
scbus->adapter_link = &ahb->sc_link;
kdc_ahb[unit].kdc_state = DC_BUSY; /* host adapters are always busy */
/*
* ask the adapter what subunits are present
*/
scsi_attachdevs(scbus);
return 1;
}
/*
* Return some information to the caller about
* the adapter and it's capabilities
*/
u_int32
ahb_adapter_info(unit)
int unit;
{
return (2); /* 2 outstanding requests at a time per device */
}
/*
* Catch an interrupt from the adaptor
*/
void
ahbintr(unit)
int unit;
{
struct ecb *ecb;
unsigned char stat;
u_char ahbstat;
int target;
long int mboxval;
struct ahb_data *ahb = ahbdata[unit];
int port = ahb->baseport;
#ifdef AHBDEBUG
printf("ahbintr ");
#endif /*AHBDEBUG */
while (inb(port + G2STAT) & G2STAT_INT_PEND) {
/*
* First get all the information and then
* acknowlege the interrupt
*/
ahbstat = inb(port + G2INTST);
target = ahbstat & G2INTST_TARGET;
stat = ahbstat & G2INTST_INT_STAT;
mboxval = inl(port + MBOXIN0); /* don't know this will work */
outb(port + G2CNTRL, G2CNTRL_CLEAR_EISA_INT);
#ifdef AHBDEBUG
printf("status = 0x%x ", stat);
#endif /*AHBDEBUG */
/*
* Process the completed operation
*/
if (stat == AHB_ECB_OK) { /* common case is fast */
ecb = ahb_ecb_phys_kv(ahb, mboxval);
} else {
switch (stat) {
case AHB_IMMED_OK:
ecb = ahb->immed_ecb;
ahb->immed_ecb = 0;
break;
case AHB_IMMED_ERR:
ecb = ahb->immed_ecb;
ecb->flags |= ECB_IMMED_FAIL;
ahb->immed_ecb = 0;
break;
case AHB_ASN: /* for target mode */
printf("ahb%d: "
"Unexpected ASN interrupt(0x%lx)\n",
unit, mboxval);
ecb = 0;
break;
case AHB_HW_ERR:
printf("ahb%d: "
"Hardware error interrupt(0x%lx)\n",
unit, mboxval);
ecb = 0;
break;
case AHB_ECB_RECOVERED:
ecb = ahb_ecb_phys_kv(ahb, mboxval);
break;
case AHB_ECB_ERR:
ecb = ahb_ecb_phys_kv(ahb, mboxval);
break;
default:
printf(" Unknown return from ahb%d(%x)\n", unit, ahbstat);
ecb = 0;
}
} if (ecb) {
#ifdef AHBDEBUG
if (ahb_debug & AHB_SHOWCMDS) {
show_scsi_cmd(ecb->xs);
}
if ((ahb_debug & AHB_SHOWECBS) && ecb)
printf("<int ecb(%x)>", ecb);
#endif /*AHBDEBUG */
untimeout(ahb_timeout, (caddr_t)ecb);
ahb_done(unit, ecb, ((stat == AHB_ECB_OK) ? SUCCESS : FAIL));
}
}
}
/*
* We have a ecb which has been processed by the
* adaptor, now we look to see how the operation
* went.
*/
void
ahb_done(unit, ecb, state)
int unit, state;
struct ecb *ecb;
{
struct ahb_ecb_status *stat = &ecb->ecb_status;
struct scsi_sense_data *s1, *s2;
struct scsi_xfer *xs = ecb->xs;
SC_DEBUG(xs->sc_link, SDEV_DB2, ("ahb_done\n"));
/*
* Otherwise, put the results of the operation
* into the xfer and call whoever started it
*/
if (ecb->flags & ECB_IMMED) {
if (ecb->flags & ECB_IMMED_FAIL) {
xs->error = XS_DRIVER_STUFFUP;
}
goto done;
}
if ((state == SUCCESS) || (xs->flags & SCSI_ERR_OK)) { /* All went correctly OR errors expected */
xs->resid = 0;
xs->error = 0;
} else {
s1 = &(ecb->ecb_sense);
s2 = &(xs->sense);
if (stat->ha_status) {
switch (stat->ha_status) {
case HS_SCSI_RESET_ADAPTER:
break;
case HS_SCSI_RESET_INCOMING:
break;
case HS_CMD_ABORTED_HOST: /* No response */
case HS_CMD_ABORTED_ADAPTER: /* No response */
break;
case HS_TIMED_OUT: /* No response */
#ifdef AHBDEBUG
if (ahb_debug & AHB_SHOWMISC) {
printf("timeout reported back\n");
}
#endif /*AHBDEBUG */
xs->error = XS_TIMEOUT;
break;
default: /* Other scsi protocol messes */
xs->error = XS_DRIVER_STUFFUP;
#ifdef AHBDEBUG
if (ahb_debug & AHB_SHOWMISC) {
printf("unexpected ha_status: %x\n",
stat->ha_status);
}
#endif /*AHBDEBUG */
}
} else {
switch (stat->targ_status) {
case TS_CHECK_CONDITION:
/* structure copy!!!!! */
*s2 = *s1;
xs->error = XS_SENSE;
break;
case TS_BUSY:
xs->error = XS_BUSY;
break;
default:
#ifdef AHBDEBUG
if (ahb_debug & AHB_SHOWMISC) {
printf("unexpected targ_status: %x\n",
stat->targ_status);
}
#endif /*AHBDEBUG */
xs->error = XS_DRIVER_STUFFUP;
}
}
}
done: xs->flags |= ITSDONE;
ahb_free_ecb(unit, ecb, xs->flags);
scsi_done(xs);
}
/*
* A ecb (and hence a mbx-out is put onto the
* free list.
*/
void
ahb_free_ecb(unit, ecb, flags)
int unit, flags;
struct ecb *ecb;
{
unsigned int opri = 0;
struct ahb_data *ahb = ahbdata[unit];
if (!(flags & SCSI_NOMASK))
opri = splbio();
ecb->next = ahb->free_ecb;
ahb->free_ecb = ecb;
ecb->flags = ECB_FREE;
/*
* If there were none, wake abybody waiting for
* one to come free, starting with queued entries
*/
if (!ecb->next) {
wakeup((caddr_t)&ahb->free_ecb);
}
if (!(flags & SCSI_NOMASK))
splx(opri);
}
/*
* Get a free ecb
* If there are none, see if we can allocate a
* new one. If so, put it in the hash table too
* otherwise either return an error or sleep
*/
struct ecb *
ahb_get_ecb(unit, flags)
int unit, flags;
{
struct ahb_data *ahb = ahbdata[unit];
unsigned opri = 0;
struct ecb *ecbp;
int hashnum;
if (!(flags & SCSI_NOMASK))
opri = splbio();
/*
* If we can and have to, sleep waiting for one to come free
* but only if we can't allocate a new one.
*/
while (!(ecbp = ahb->free_ecb)) {
if (ahb->numecbs < AHB_ECB_MAX) {
ecbp = (struct ecb *) malloc(sizeof(struct ecb),
M_TEMP,
M_NOWAIT);
if (ecbp) {
bzero(ecbp, sizeof(struct ecb));
ahb->numecbs++;
ecbp->flags = ECB_ACTIVE;
/*
* put in the phystokv hash table
* Never gets taken out.
*/
ecbp->hashkey = KVTOPHYS(ecbp);
hashnum = ECB_HASH(ecbp->hashkey);
ecbp->nexthash = ahb->ecbhash[hashnum];
ahb->ecbhash[hashnum] = ecbp;
} else {
printf("ahb%d: Can't malloc ECB\n", unit);
} goto gottit;
} else {
if (!(flags & SCSI_NOSLEEP)) {
tsleep((caddr_t)&ahb->free_ecb, PRIBIO,
"ahbecb", 0);
}
}
} if (ecbp) {
/* Get ECB from from free list */
ahb->free_ecb = ecbp->next;
ecbp->flags = ECB_ACTIVE;
}
gottit: if (!(flags & SCSI_NOMASK))
splx(opri);
return (ecbp);
}
/*
* given a physical address, find the ecb that
* it corresponds to:
*/
struct ecb *
ahb_ecb_phys_kv(ahb, ecb_phys)
struct ahb_data *ahb;
physaddr ecb_phys;
{
int hashnum = ECB_HASH(ecb_phys);
struct ecb *ecbp = ahb->ecbhash[hashnum];
while (ecbp) {
if (ecbp->hashkey == ecb_phys)
break;
ecbp = ecbp->nexthash;
}
return ecbp;
}
/*
* Start the board, ready for normal operation
*/
int
ahb_init(unit)
int unit;
{
struct ahb_data *ahb = ahbdata[unit];
int port = ahb->baseport;
int intdef;
int wait = 1000; /* 1 sec enough? */
int i;
int stport = port + G2STAT;
#define NO_NO 1
#ifdef NO_NO
/*
* reset board, If it doesn't respond, assume
* that it's not there.. good for the probe
*/
outb(port + EBCTRL, CDEN); /* enable full card */
outb(port + PORTADDR, PORTADDR_ENHANCED);
outb(port + G2CNTRL, G2CNTRL_HARD_RESET);
DELAY(1000);
outb(port + G2CNTRL, 0);
DELAY(10000);
while (--wait) {
if ((inb(stport) & G2STAT_BUSY) == 0)
break;
DELAY(1000);
} if (wait == 0) {
#ifdef AHBDEBUG
if (ahb_debug & AHB_SHOWMISC)
printf("ahb_init: No answer from aha1742 board\n");
#endif /*AHBDEBUG */
return (ENXIO);
}
i = inb(port + MBOXIN0) & 0xff;
if (i) {
printf("self test failed, val = 0x%x\n", i);
return (EIO);
}
#endif
while (inb(stport) & G2STAT_INT_PEND) {
printf(".");
outb(port + G2CNTRL, G2CNTRL_CLEAR_EISA_INT);
DELAY(10000);
}
outb(port + EBCTRL, CDEN); /* enable full card */
outb(port + PORTADDR, PORTADDR_ENHANCED);
/*
* Assume we have a board at this stage
* setup dma channel from jumpers and save int
* level
*/
printf("ahb%d: reading board settings, ", unit);
intdef = inb(port + INTDEF);
switch (intdef & 0x07) {
case INT9:
ahb->vect = 9;
break;
case INT10:
ahb->vect = 10;
break;
case INT11:
ahb->vect = 11;
break;
case INT12:
ahb->vect = 12;
break;
case INT14:
ahb->vect = 14;
break;
case INT15:
ahb->vect = 15;
break;
default:
printf("illegal int setting\n");
return (EIO);
}
printf("int=%d\n", ahb->vect);
outb(port + INTDEF, (intdef | INTEN)); /* make sure we can interrupt */
/* who are we on the scsi bus? */
ahb->our_id = (inb(port + SCSIDEF) & HSCSIID);
/*
* Note that we are going and return (to probe)
*/
ahb->flags |= AHB_INIT;
return (0);
}
#ifndef min
#define min(x,y) (x < y ? x : y)
#endif /* min */
void
ahbminphys(bp)
struct buf *bp;
{
if (bp->b_bcount > ((AHB_NSEG - 1) * PAGESIZ)) {
bp->b_bcount = ((AHB_NSEG - 1) * PAGESIZ);
}
}
/*
* start a scsi operation given the command and
* the data address. Also needs the unit, target
* and lu
*/
int32
ahb_scsi_cmd(xs)
struct scsi_xfer *xs;
{
struct ecb *ecb;
struct ahb_dma_seg *sg;
int seg; /* scatter gather seg being worked on */
int thiskv;
physaddr thisphys, nextphys;
int unit = xs->sc_link->adapter_unit;
int bytes_this_seg, bytes_this_page, datalen, flags;
struct ahb_data *ahb = ahbdata[unit];
int s;
SC_DEBUG(xs->sc_link, SDEV_DB2, ("ahb_scsi_cmd\n"));
/*
* get a ecb (mbox-out) to use. If the transfer
* is from a buf (possibly from interrupt time)
* then we can't allow it to sleep
*/
flags = xs->flags;
if (xs->bp)
flags |= (SCSI_NOSLEEP); /* just to be sure */
if (flags & ITSDONE) {
printf("ahb%d: Already done?", unit);
xs->flags &= ~ITSDONE;
}
if (!(flags & INUSE)) {
printf("ahb%d: Not in use?", unit);
xs->flags |= INUSE;
}
if (!(ecb = ahb_get_ecb(unit, flags))) {
xs->error = XS_DRIVER_STUFFUP;
return (TRY_AGAIN_LATER);
}
cheat = ecb;
SC_DEBUG(xs->sc_link, SDEV_DB3, ("start ecb(%p)\n", ecb));
ecb->xs = xs;
/*
* If it's a reset, we need to do an 'immediate'
* command, and store it's ecb for later
* if there is already an immediate waiting,
* then WE must wait
*/
if (flags & SCSI_RESET) {
ecb->flags |= ECB_IMMED;
if (ahb->immed_ecb) {
return (TRY_AGAIN_LATER);
}
ahb->immed_ecb = ecb;
if (!(flags & SCSI_NOMASK)) {
s = splbio();
ahb_send_immed(unit, xs->sc_link->target, AHB_TARG_RESET);
timeout(ahb_timeout, (caddr_t)ecb, (xs->timeout * hz) / 1000);
splx(s);
return (SUCCESSFULLY_QUEUED);
} else {
ahb_send_immed(unit, xs->sc_link->target, AHB_TARG_RESET);
/*
* If we can't use interrupts, poll on completion
*/
SC_DEBUG(xs->sc_link, SDEV_DB3, ("wait\n"));
if (ahb_poll(unit, xs->timeout)) {
ahb_free_ecb(unit, ecb, flags);
xs->error = XS_TIMEOUT;
return (HAD_ERROR);
}
return (COMPLETE);
}
}
/*
* Put all the arguments for the xfer in the ecb
*/
ecb->opcode = ECB_SCSI_OP;
ecb->opt1 = ECB_SES | ECB_DSB | ECB_ARS;
if (xs->datalen) {
ecb->opt1 |= ECB_S_G;
}
ecb->opt2 = xs->sc_link->lun | ECB_NRB;
ecb->cdblen = xs->cmdlen;
ecb->sense = KVTOPHYS(&(ecb->ecb_sense));
ecb->senselen = sizeof(ecb->ecb_sense);
ecb->status = KVTOPHYS(&(ecb->ecb_status));
if (xs->datalen) { /* should use S/G only if not zero length */
ecb->data = KVTOPHYS(ecb->ahb_dma);
sg = ecb->ahb_dma;
seg = 0;
#ifdef TFS
if (flags & SCSI_DATA_UIO) {
iovp = ((struct uio *) xs->data)->uio_iov;
datalen = ((struct uio *) xs->data)->uio_iovcnt;
xs->datalen = 0;
while ((datalen) && (seg < AHB_NSEG)) {
sg->addr = (physaddr) iovp->iov_base;
xs->datalen += sg->len = iovp->iov_len;
SC_DEBUGN(xs->sc_link, SDEV_DB4,
("(0x%x@0x%x)", iovp->iov_len
,iovp->iov_base));
sg++;
iovp++;
seg++;
datalen--;
}
}
else
#endif /*TFS */
{
/*
* Set up the scatter gather block
*/
SC_DEBUG(xs->sc_link, SDEV_DB4,
("%ld @%p:- ", xs->datalen, xs->data));
datalen = xs->datalen;
thiskv = (int) xs->data;
thisphys = KVTOPHYS(thiskv);
while ((datalen) && (seg < AHB_NSEG)) {
bytes_this_seg = 0;
/* put in the base address */
sg->addr = thisphys;
SC_DEBUGN(xs->sc_link, SDEV_DB4, ("0x%lx",
thisphys));
/* do it at least once */
nextphys = thisphys;
while ((datalen) && (thisphys == nextphys)) {
/*
* This page is contiguous (physically) with
* the the last, just extend the length
*/
/* how far to the end of the page */
nextphys = (thisphys & (~(PAGESIZ - 1)))
+ PAGESIZ;
bytes_this_page = nextphys - thisphys;
/**** or the data ****/
bytes_this_page = min(bytes_this_page
,datalen);
bytes_this_seg += bytes_this_page;
datalen -= bytes_this_page;
/* get more ready for the next page */
thiskv = (thiskv & (~(PAGESIZ - 1)))
+ PAGESIZ;
if (datalen)
thisphys = KVTOPHYS(thiskv);
}
/*
* next page isn't contiguous, finish the seg
*/
SC_DEBUGN(xs->sc_link, SDEV_DB4,
("(0x%x)", bytes_this_seg));
sg->len = bytes_this_seg;
sg++;
seg++;
}
} /*end of iov/kv decision */
ecb->datalen = seg * sizeof(struct ahb_dma_seg);
SC_DEBUGN(xs->sc_link, SDEV_DB4, ("\n"));
if (datalen) { /* there's still data, must have run out of segs! */
printf("ahb_scsi_cmd%d: more than %d DMA segs\n",
unit, AHB_NSEG);
xs->error = XS_DRIVER_STUFFUP;
ahb_free_ecb(unit, ecb, flags);
return (HAD_ERROR);
}
} else { /* No data xfer, use non S/G values */
ecb->data = (physaddr) 0;
ecb->datalen = 0;
} ecb->chain = (physaddr) 0;
/*
* Put the scsi command in the ecb and start it
*/
bcopy(xs->cmd, ecb->cdb, xs->cmdlen);
/*
* Usually return SUCCESSFULLY QUEUED
*/
if (!(flags & SCSI_NOMASK)) {
s = splbio();
ahb_send_mbox(unit, OP_START_ECB, xs->sc_link->target, ecb);
timeout(ahb_timeout, (caddr_t)ecb, (xs->timeout * hz) / 1000);
splx(s);
SC_DEBUG(xs->sc_link, SDEV_DB3, ("cmd_sent\n"));
return (SUCCESSFULLY_QUEUED);
}
/*
* If we can't use interrupts, poll on completion
*/
ahb_send_mbox(unit, OP_START_ECB, xs->sc_link->target, ecb);
SC_DEBUG(xs->sc_link, SDEV_DB3, ("cmd_wait\n"));
do {
if (ahb_poll(unit, xs->timeout)) {
if (!(xs->flags & SCSI_SILENT))
printf("cmd fail\n");
ahb_send_mbox(unit, OP_ABORT_ECB, xs->sc_link->target, ecb);
if (ahb_poll(unit, 2000)) {
printf("abort failed in wait\n");
ahb_free_ecb(unit, ecb, flags);
}
xs->error = XS_DRIVER_STUFFUP;
return (HAD_ERROR);
}
} while (!(xs->flags & ITSDONE)); /* something (?) else finished */
if (xs->error) {
return (HAD_ERROR);
}
return (COMPLETE);
}
void
ahb_timeout(void *arg1)
{
struct ecb * ecb = (struct ecb *)arg1;
int unit;
struct ahb_data *ahb;
int s = splbio();
unit = ecb->xs->sc_link->adapter_unit;
ahb = ahbdata[unit];
printf("ahb%d:%d:%d (%s%d) timed out ", unit
,ecb->xs->sc_link->target
,ecb->xs->sc_link->lun
,ecb->xs->sc_link->device->name
,ecb->xs->sc_link->dev_unit);
#ifdef AHBDEBUG
if (ahb_debug & AHB_SHOWECBS)
ahb_print_active_ecb(unit);
#endif /*AHBDEBUG */
/*
* If it's immediate, don't try abort it
*/
if (ecb->flags & ECB_IMMED) {
ecb->xs->retries = 0; /* I MEAN IT ! */
ecb->flags |= ECB_IMMED_FAIL;
ahb_done(unit, ecb, FAIL);
splx(s);
return;
}
/*
* If it has been through before, then
* a previous abort has failed, don't
* try abort again
*/
if (ecb->flags == ECB_ABORTED) {
/*
* abort timed out
*/
printf("AGAIN");
ecb->xs->retries = 0; /* I MEAN IT ! */
ecb->ecb_status.ha_status = HS_CMD_ABORTED_HOST;
ahb_done(unit, ecb, FAIL);
} else { /* abort the operation that has timed out */
printf("\n");
ahb_send_mbox(unit, OP_ABORT_ECB, ecb->xs->sc_link->target, ecb);
/* 2 secs for the abort */
timeout(ahb_timeout, (caddr_t)ecb, 2 * hz);
ecb->flags = ECB_ABORTED;
}
splx(s);
}
#ifdef AHBDEBUG
void
ahb_print_ecb(ecb)
struct ecb *ecb;
{
printf("ecb:%x op:%x cmdlen:%d senlen:%d\n"
,ecb
,ecb->opcode
,ecb->cdblen
,ecb->senselen);
printf(" datlen:%d hstat:%x tstat:%x flags:%x\n"
,ecb->datalen
,ecb->ecb_status.ha_status
,ecb->ecb_status.targ_status
,ecb->flags);
show_scsi_cmd(ecb->xs);
}
void
ahb_print_active_ecb(int unit)
{
struct ahb_data *ahb = ahbdata[unit];
struct ecb *ecb;
int i = 0;
while (i < ECB_HASH_SIZE) {
ecb = ahb->ecbhash[i];
while (ecb) {
if (ecb->flags != ECB_FREE) {
ahb_print_ecb(ecb);
}
ecb = ecb->nexthash;
} i++;
}
}
#endif /*AHBDEBUG */
#endif /*KERNEL */
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