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35898da3bf
freebsd-skq/sys/i386/isa/ncr5380.c
phk 35898da3bf New and far better NCR5380/NCR53400 scsi-driver. 
Handles at least Trantor T130 and ProAudioSpectrum adapters.
The pas driver has consequently been removed.
This driver can be configured without without interrupts.

Manpage to follow when PAS16 has been edited in.

Reviewed by:	phk
Submitted by:	Serge Vakulenko, <vak@cronyx.ru>
1995-01-27 07:49:19 +00:00

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/*
* FreeBSD generic NCR-5380/NCR-53C400 SCSI driver
*
* Copyright (C) 1994 Serge Vakulenko (vak@cronyx.ru)
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE DEVELOPERS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* Tested on the following hardware:
* Adapter: Trantor T130
* Streamer: Archive Viper 150,
* CD-ROM: NEC CDR-25
*/
#undef DEBUG
#include "nca.h"
#if NNCA > 0
#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.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 <sys/devconf.h>
#include <i386/isa/isa_device.h>
#include <i386/isa/ic/ncr5380.h>
#include <i386/isa/ic/ncr53400.h>
#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>
#ifdef DEBUG
# define PRINT(s) printf s
#else
# define PRINT(s) /*void*/
#endif
#define SCB_TABLE_SIZE 8 /* start with 8 scb entries in table */
#define BLOCK_SIZE 512 /* size of READ/WRITE areas on SCSI card */
#define HOST_SCSI_ADDR 7 /* address of the adapter on the SCSI bus */
/*
* Defice config flags
*/
#define FLAG_NOPARITY 0x01 /* disable SCSI bus parity check */
/*
* ProAudioSpectrum registers
*/
#define PAS16_DATA 8 /* Data Register */
#define PAS16_STAT 9 /* Status Register */
#define PAS16_STAT_DREQ 0x80 /* Pseudo-DMA ready bit */
#define PAS16_REG(r) (((r) & 0xc) << 11 | ((r) & 3))
static u_char pas16_irq_magic[] =
{ 0, 0, 1, 2, 3, 4, 5, 6, 0, 0, 7, 8, 9, 0, 10, 11 };
/*
* SCSI bus phases
*/
#define PHASE_MASK (CSBR_MSG | CSBR_CD | CSBR_IO)
#define PHASE_DATAOUT 0
#define PHASE_DATAIN CSBR_IO
#define PHASE_CMDOUT CSBR_CD
#define PHASE_STATIN (CSBR_CD | CSBR_IO)
#define PHASE_MSGOUT (CSBR_MSG | CSBR_CD)
#define PHASE_MSGIN (CSBR_MSG | CSBR_CD | CSBR_IO)
#define PHASE_NAME(ph) phase_name[(ph)>>2]
#define PHASE_TO_TCR(ph) ((ph) >> 2)
static char *phase_name[] = {
"DATAOUT", "DATAIN", "CMDOUT", "STATIN",
"Phase4?", "Phase5?", "MSGOUT", "MSGIN",
};
/*
* SCSI message codes
*/
#define MSG_COMMAND_COMPLETE 0x00
#define MSG_SAVE_POINTERS 0x02
#define MSG_RESTORE_POINTERS 0x03
#define MSG_DISCONNECT 0x04
#define MSG_ABORT 0x06
#define MSG_MESSAGE_REJECT 0x07
#define MSG_NOP 0x08
#define MSG_BUS_DEV_RESET 0x0c
#define MSG_IDENTIFY(lun) (0xc0 | ((lun) & 0x7))
#define MSG_ISIDENT(m) ((m) & 0x80)
/*
* SCSI control block used to keep info about a scsi command
*/
typedef struct scb {
int flags; /* status of the instruction */
#define SCB_FREE 0x00
#define SCB_ACTIVE 0x01
#define SCB_ABORTED 0x02
#define SCB_TIMEOUT 0x04
#define SCB_ERROR 0x08
#define SCB_TIMECHK 0x10 /* we have set a timeout on this one */
#define SCB_SENSE 0x20 /* sensed data available */
#define SCB_TBUSY 0x40 /* target busy */
struct scb *next; /* in free list */
struct scsi_xfer *xfer; /* the scsi_xfer for this cmd */
u_char *data; /* position in data buffer so far */
int32 datalen; /* bytes remaining to transfer */;
} scb_t;
typedef enum {
CTLR_NONE,
CTLR_NCR_5380,
CTLR_NCR_53C400,
CTLR_PAS_16,
} ctlr_t;
/*
* Data structure describing the target state.
*/
typedef struct {
u_char busy; /* mask of busy luns at device target */
u_long perrcnt; /* counter of target parity errors */
} target_t;
/*
* Data structure describing current status of the scsi bus. One for each
* controller card.
*/
typedef struct {
ctlr_t type; /* Seagate or Future Domain */
char *name; /* adapter name */
/* NCR-5380 controller registers */
u_short ODR; /* (wo-0) Output Data Register */
u_short CSDR; /* (ro-0) Current SCSI Data Register */
u_short ICR; /* (rw-1) Initiator Command Register */
u_short MR; /* (rw-2) Mode Register */
u_short TCR; /* (rw-3) Target Command Register */
u_short SER; /* (wo-4) Select Enable Register */
u_short CSBR; /* (ro-4) Current SCSI Bus Status Register */
u_short BSR; /* (ro-5) Bus and Status Register */
u_short SDSR; /* (wo-5) Start DMA Send Register */
u_short SDIR; /* (wo-7) Start DMA Initiator Receive Register */
u_short RPIR; /* (ro-7) Reset Parity/Interrupt Register */
/* NCR-53C400 controller registers */
u_short CSR; /* (rw-0) Control and Status Register */
u_short CCR; /* (rw-1) Clock Counter Register */
u_short HBR; /* (rw-4) Host Buffer Register */
/* ProAudioSpectrum controller registers */
u_short PDATA; /* (rw) Pseudo-DMA Data Register */
u_short PSTAT; /* (rw) Pseudo-DMA Status Register */
u_char scsi_addr; /* our scsi address, 0..7 */
u_char scsi_id; /* our scsi id mask */
u_char parity; /* parity flag: CMD_EN_PARITY or 0 */
u_char irq; /* IRQ number used or 0 if no IRQ */
u_int timeout_active : 1; /* timeout() active (requested) */
struct scsi_link sc_link; /* struct connecting different data */
scb_t *queue; /* waiting to be issued */
scb_t *disconnected_queue; /* waiting to reconnect */
int numscb; /* number of scsi control blocks */
scb_t *free_scb; /* free scb list */
scb_t scbs[SCB_TABLE_SIZE];
target_t target[8]; /* target state data */
} adapter_t;
adapter_t ncadata[NNCA];
#define IS_BUSY(a,b) ((a)->target[(b)->xfer->sc_link->target].busy &\
(1 << (b)->xfer->sc_link->lun))
#define SET_BUSY(a,b) ((a)->target[(b)->xfer->sc_link->target].busy |=\
(1 << (b)->xfer->sc_link->lun))
#define CLEAR_BUSY(a,b) ((a)->target[(b)->xfer->sc_link->target].busy &=\
~(1 << (b)->xfer->sc_link->lun))
/*
* Wait for condition, given as an boolean expression.
* Print the message on timeout.
*/
#define WAITFOR(condition,count,message) {\
register u_long cnt = count; char *msg = message;\
while (cnt-- && ! (condition)) continue;\
if (cnt == -1 && msg)\
printf ("nca: %s timeout\n", msg); }
int ncaintr (int unit);
static int nca_probe (struct isa_device *dev);
static int nca_attach (struct isa_device *dev);
static int32 nca_scsi_cmd (struct scsi_xfer *xs);
static u_int32 nca_adapter_info (int unit);
static void nca_timeout (void *scb);
static void ncaminphys (struct buf *bp);
static void nca_done (adapter_t *z, scb_t *scb);
static void nca_start (adapter_t *z);
static void nca_information_transfer (adapter_t *z, scb_t *scb);
static int nca_poll (adapter_t *z, scb_t *scb);
static int nca_init (adapter_t *z);
static int nca_reselect (adapter_t *z);
static int nca_select (adapter_t *z, scb_t *scb);
static int nca_abort (adapter_t *z, scb_t *scb);
static void nca_send_abort (adapter_t *z);
static u_char nca_msg_input (adapter_t *z);
static void nca_tick (void *arg);
static int nca_sense (adapter_t *z, scb_t *scb);
static void nca_data_output (adapter_t *z, u_char **pdata, u_long *plen);
static void nca_data_input (adapter_t *z, u_char **pdata, u_long *plen);
static void nca_cmd_output (adapter_t *z, u_char *cmd, int cmdlen);
static void nca_53400_dma_xfer (adapter_t *z, int r, u_char **dat, u_long *len);
static void nca_pas_dma_xfer (adapter_t *z, int r, u_char **dat, u_long *len);
static struct scsi_adapter nca_switch = {
nca_scsi_cmd, ncaminphys, 0, 0, nca_adapter_info, "nca", {0},
};
static struct scsi_device nca_dev = { NULL, NULL, NULL, NULL, "nca", 0, {0} };
struct isa_driver ncadriver = { nca_probe, nca_attach, "nca" };
/*
* Check if the device can be found at the port given and if so,
* detect the type of board. Set it up ready for further work.
* Takes the isa_dev structure from autoconf as an argument.
* Returns 1 if card recognized, 0 if errors.
*/
int nca_probe (struct isa_device *dev)
{
adapter_t *z = &ncadata[dev->id_unit];
int i;
/* Init fields used by our routines */
z->parity = (dev->id_flags & FLAG_NOPARITY) ? 0 :
MR_ENABLE_PARITY_CHECKING;
z->scsi_addr = HOST_SCSI_ADDR;
z->scsi_id = 1 << z->scsi_addr;
z->irq = dev->id_irq ? ffs (dev->id_irq) - 1 : 0;
z->queue = 0;
z->disconnected_queue = 0;
for (i=0; i<8; i++)
z->target[i].busy = 0;
/* Link up the free list of scbs */
z->numscb = SCB_TABLE_SIZE;
z->free_scb = z->scbs;
for (i=1; i<SCB_TABLE_SIZE; i++)
z->scbs[i-1].next = z->scbs + i;
z->scbs[SCB_TABLE_SIZE-1].next = 0;
/* Try NCR 5380. */
z->type = CTLR_NCR_5380;
z->name = "NCR-5380";
z->ODR = dev->id_iobase + C80_ODR;
z->CSDR = dev->id_iobase + C80_CSDR;
z->ICR = dev->id_iobase + C80_ICR;
z->MR = dev->id_iobase + C80_MR;
z->TCR = dev->id_iobase + C80_TCR;
z->SER = dev->id_iobase + C80_SER;
z->CSBR = dev->id_iobase + C80_CSBR;
z->BSR = dev->id_iobase + C80_BSR;
z->SDSR = dev->id_iobase + C80_SDSR;
z->SDIR = dev->id_iobase + C80_SDIR;
z->RPIR = dev->id_iobase + C80_RPIR;
z->CSR = 0;
z->CCR = 0;
z->HBR = 0;
z->PDATA = 0;
z->PSTAT = 0;
if (nca_init (z) == 0)
return (8);
/* Try NCR 53C400. */
z->type = CTLR_NCR_53C400;
z->name = "NCR-53C400";
z->ODR = dev->id_iobase + C400_5380_REG_OFFSET + C80_ODR;
z->CSDR = dev->id_iobase + C400_5380_REG_OFFSET + C80_CSDR;
z->ICR = dev->id_iobase + C400_5380_REG_OFFSET + C80_ICR;
z->MR = dev->id_iobase + C400_5380_REG_OFFSET + C80_MR;
z->TCR = dev->id_iobase + C400_5380_REG_OFFSET + C80_TCR;
z->SER = dev->id_iobase + C400_5380_REG_OFFSET + C80_SER;
z->CSBR = dev->id_iobase + C400_5380_REG_OFFSET + C80_CSBR;
z->BSR = dev->id_iobase + C400_5380_REG_OFFSET + C80_BSR;
z->SDSR = dev->id_iobase + C400_5380_REG_OFFSET + C80_SDSR;
z->SDIR = dev->id_iobase + C400_5380_REG_OFFSET + C80_SDIR;
z->RPIR = dev->id_iobase + C400_5380_REG_OFFSET + C80_RPIR;
z->CSR = dev->id_iobase + C400_CSR;
z->CCR = dev->id_iobase + C400_CCR;
z->HBR = dev->id_iobase + C400_HBR;
z->PDATA = 0;
z->PSTAT = 0;
if (nca_init (z) == 0)
return (16);
/* Try ProAudioSpectrum-16. */
z->type = CTLR_PAS_16;
z->name = "ProAudioSpectrum"; /* changed later */
z->ODR = dev->id_iobase ^ PAS16_REG (C80_ODR);
z->CSDR = dev->id_iobase ^ PAS16_REG (C80_CSDR);
z->ICR = dev->id_iobase ^ PAS16_REG (C80_ICR);
z->MR = dev->id_iobase ^ PAS16_REG (C80_MR);
z->TCR = dev->id_iobase ^ PAS16_REG (C80_TCR);
z->SER = dev->id_iobase ^ PAS16_REG (C80_SER);
z->CSBR = dev->id_iobase ^ PAS16_REG (C80_CSBR);
z->BSR = dev->id_iobase ^ PAS16_REG (C80_BSR);
z->SDSR = dev->id_iobase ^ PAS16_REG (C80_SDSR);
z->SDIR = dev->id_iobase ^ PAS16_REG (C80_SDIR);
z->RPIR = dev->id_iobase ^ PAS16_REG (C80_RPIR);
z->CSR = 0;
z->CCR = 0;
z->HBR = 0;
z->PDATA = dev->id_iobase ^ PAS16_REG (PAS16_DATA);
z->PSTAT = dev->id_iobase ^ PAS16_REG (PAS16_STAT);
if (nca_init (z) == 0)
return (4);
bzero (z, sizeof (*z));
return (0);
}
/*
* Probe the adapter, and if found, reset the board and the scsi bus.
* Return 0 if the adapter found.
*/
int nca_init (adapter_t *z)
{
int i, c;
if (z->type == CTLR_NCR_53C400) {
if (inb (z->CSR) == 0xFF)
return (100);
/* Reset 53C400. */
outb (z->CSR, CSR_5380_ENABLE);
/* Enable interrupts. */
outb (z->CSR, z->irq ? CSR_5380_INTR : 0);
}
if (z->type == CTLR_PAS_16) {
u_short base = z->PDATA & 0x3FF;
outb (0x9a01, 0xbc + (z-ncadata)); /* unit number */
outb (0x9a01, base >> 2);
if (inb (base^0x803) == 0xFF)
return (200);
if (inb (z->CSDR) == 0xFF && inb (z->CSDR^0x2000) == 0xFF &&
inb (z->CSDR) == 0xFF && inb (z->CSDR^0x2000) == 0xFF &&
inb (z->CSDR) == 0xFF && inb (z->CSDR^0x2000) == 0xFF &&
inb (z->CSDR) == 0xFF && inb (z->CSDR^0x2000) == 0xFF)
return (201);
i = inb (base^0x803);
outb (base^0x803, i ^ 0xE0);
c = inb (base^0x803);
outb (base^0x803, 1);
if (i != c)
return (202);
/* Various magic. */
outb (base^0x4000, 0x30); /* Timeout counter */
outb (base^0x4001, 0x01); /* Reset TC */
outb (base^0xbc00, 0x01); /* 1 Wait state */
outb (base^0x8003, 0x4d); /* sysconfig_4 */
i = pas16_irq_magic[z->irq];
if (!i) {
z->irq = 0;
} else {
outb (base^0xf002, i << 4);
outb (base^0x8003, 0x6d); /* sysconfig_4 */
}
switch (inb (base^0xEC03) & 0xF) {
case 6: z->name = "ProAudioSpectrum-Plus"; break;
case 12: z->name = "ProAudioSpectrum-16D"; break;
case 14: z->name = "ProAudioSpectrum-CDPC"; break;
case 15: z->name = "ProAudioSpectrum-16"; break;
default: return (203);
}
}
/* Read RPI port, resetting parity/interrupt state. */
inb (z->RPIR);
/* Test BSR: parity error, interrupt request and busy loss state
* should be cleared. */
if (inb (z->BSR) & (BSR_PARITY_ERROR |
BSR_INTERRUPT_REQUEST_ACTIVE | BSR_BUSY_ERROR)) {
PRINT (("nca: invalid bsr[0x%x]=%b\n", z->BSR,
inb (z->BSR), BSR_BITS));
return (1);
}
/* Reset the SCSI bus. */
outb (z->ICR, ICR_ASSERT_RST);
outb (z->ODR, 0);
/* Hold reset for at least 25 microseconds. */
DELAY (25);
/* Check that status cleared. */
if (inb (z->CSBR) != CSBR_RST) {
PRINT (("nca: invalid csbr[0x%x]=%b\n", z->CSBR,
inb (z->CSBR), CSBR_BITS));
outb (z->ICR, 0);
return (2);
}
/* Clear reset. */
outb (z->ICR, 0);
/* Wait a Bus Clear Delay (800 ns + bus free delay 800 ns). */
DELAY (2);
/* Enable data drivers. */
outb (z->ICR, ICR_ASSERT_DATA_BUS);
/* Check that data register is writable. */
for (i=0; i<256; ++i) {
outb (z->ODR, i);
DELAY (1);
if (inb (z->CSDR) != i) {
PRINT (("nca: ODR[0x%x] not writable: 0x%x should be 0x%x\n",
z->ODR, inb (z->CSDR), i));
outb (z->ICR, 0);
return (3);
}
}
/* Disable data drivers. */
outb (z->ICR, 0);
/* Check that data register is NOT writable. */
c = inb (z->CSDR);
for (i=0; i<256; ++i) {
outb (z->ODR, i);
DELAY (1);
if (inb (z->CSDR) != c) {
PRINT (("nca: ODR[0x%x] writable: 0x%x should be 0x%x\n",
z->ODR, inb (z->CSDR), c));
return (4);
}
}
/* Initialize the controller. */
outb (z->MR, z->parity);
outb (z->TCR, 0);
outb (z->SER, z->scsi_id);
return (0);
}
static char nca_description [80];
static struct kern_devconf nca_kdc[NNCA] = {{
0, 0, 0, "nca", 0, { MDDT_ISA, 0, "bio" },
isa_generic_externalize, 0, 0, ISA_EXTERNALLEN, &kdc_isa0, 0,
DC_BUSY, nca_description,
}};
/*
* Attach all sub-devices we can find.
*/
int nca_attach (struct isa_device *dev)
{
int unit = dev->id_unit;
adapter_t *z = &ncadata[unit];
sprintf (nca_description, "%s SCSI controller", z->name);
printf ("nca%d: type %s%s\n", unit, z->name,
(dev->id_flags & FLAG_NOPARITY) ? ", no parity" : "");
/* fill in the prototype scsi_link */
z->sc_link.adapter_unit = unit;
z->sc_link.adapter_targ = z->scsi_addr;
z->sc_link.adapter = &nca_switch;
z->sc_link.device = &nca_dev;
/* ask the adapter what subunits are present */
scsi_attachdevs (&(z->sc_link));
if (dev->id_unit)
nca_kdc[dev->id_unit] = nca_kdc[0];
nca_kdc[dev->id_unit].kdc_unit = dev->id_unit;
nca_kdc[dev->id_unit].kdc_isa = dev;
dev_attach (&nca_kdc[dev->id_unit]);
return (1);
}
/*
* Return some information to the caller about
* the adapter and its capabilities.
*/
u_int32 nca_adapter_info (int unit)
{
return (1);
}
void ncaminphys (struct buf *bp)
{
}
/*
* Catch an interrupt from the adaptor.
*/
int ncaintr (int unit)
{
adapter_t *z = &ncadata[unit];
PRINT (("nca%d: interrupt bsr=%b csbr=%b\n", unit,
inb (z->BSR), BSR_BITS, inb (z->CSBR), CSBR_BITS));
nca_start (z);
/* Reset interrupt state. */
inb (z->RPIR);
return (1);
}
/*
* This routine is used in the case when we have no IRQ line (z->irq == 0).
* It is called every timer tick and polls for reconnect from target.
*/
void nca_tick (void *arg)
{
adapter_t *z = arg;
int x = splbio ();
z->timeout_active = 0;
nca_start (z);
/* Reset interrupt state. */
inb (z->RPIR);
if (z->disconnected_queue && ! z->timeout_active) {
timeout (nca_tick, z, 1);
z->timeout_active = 1;
}
splx (x);
}
/*
* Start a scsi operation given the command and the data address.
* Also needs the unit, target and lu. Get a free scb and set it up.
* Call send_scb. Either start timer or wait until done.
*/
int32 nca_scsi_cmd (struct scsi_xfer *xs)
{
int unit = xs->sc_link->adapter_unit, flags = xs->flags, x = 0;
adapter_t *z = &ncadata[unit];
scb_t *scb;
/* PRINT (("nca%d/%d/%d command 0x%x\n", unit, xs->sc_link->target,
xs->sc_link->lun, xs->cmd->opcode)); */
if (xs->bp)
flags |= SCSI_NOSLEEP;
if (flags & ITSDONE) {
printf ("nca%d: already done?", unit);
xs->flags &= ~ITSDONE;
}
if (! (flags & INUSE)) {
printf ("nca%d: not in use?", unit);
xs->flags |= INUSE;
}
if (flags & SCSI_RESET)
printf ("nca%d: SCSI_RESET not implemented\n", unit);
if (! (flags & SCSI_NOMASK))
x = splbio ();
/* Get a free scb.
* If we can and have to, sleep waiting for one to come free. */
while (! (scb = z->free_scb)) {
if (flags & SCSI_NOSLEEP) {
xs->error = XS_DRIVER_STUFFUP;
if (! (flags & SCSI_NOMASK))
splx (x);
return (TRY_AGAIN_LATER);
}
tsleep ((caddr_t)&z->free_scb, PRIBIO, "ncascb", 0);
}
/* Get scb from free list. */
z->free_scb = scb->next;
scb->next = 0;
scb->flags = SCB_ACTIVE;
/* Put all the arguments for the xfer in the scb */
scb->xfer = xs;
scb->datalen = xs->datalen;
scb->data = xs->data;
/* Setup the scb to contain necessary values.
* The interesting values can be read from the xs that is saved.
* I therefore think that the structure can be kept very small.
* The driver doesn't use DMA so the scatter/gather is not needed? */
if (! z->queue) {
scb->next = z->queue;
z->queue = scb;
} else {
scb_t *q;
for (q=z->queue; q->next; q=q->next)
continue;
q->next = scb;
scb->next = 0; /* placed at the end of the queue */
}
/* Try to send this command to the board. */
nca_start (z);
/* Usually return SUCCESSFULLY QUEUED. */
if (! (flags & SCSI_NOMASK)) {
splx (x);
if (xs->flags & ITSDONE)
/* Timeout timer not started, already finished.
* Tried to return COMPLETE but the machine hanged
* with this. */
return (SUCCESSFULLY_QUEUED);
timeout (nca_timeout, (caddr_t) scb, (xs->timeout * hz) / 1000);
scb->flags |= SCB_TIMECHK;
PRINT (("nca%d/%d/%d command queued\n", unit,
xs->sc_link->target, xs->sc_link->lun));
return (SUCCESSFULLY_QUEUED);
}
/* If we can't use interrupts, poll on completion. */
if (! nca_poll (z, scb)) {
/* We timed out, so call the timeout handler manually,
* accounting for the fact that the clock is not running yet
* by taking out the clock queue entry it makes. */
nca_timeout ((void*) scb);
/* Because we are polling, take out the timeout entry
* nca_timeout made. */
untimeout (nca_timeout, (void*) scb);
if (! nca_poll (z, scb))
/* We timed out again... This is bad. Notice that
* this time there is no clock queue entry to remove. */
nca_timeout ((void*) scb);
}
/* PRINT (("nca%d/%d/%d command %s\n", unit,
xs->sc_link->target, xs->sc_link->lun,
xs->error ? "failed" : "done")); */
return (xs->error ? HAD_ERROR : COMPLETE);
}
/*
* Coroutine that runs as long as more work can be done.
* Both scsi_cmd() and intr() will try to start it in
* case it is not running.
* Always called with interrupts disabled.
*/
void nca_start (adapter_t *z)
{
scb_t *q, *prev;
again:
/* First check that if any device has tried
* a reconnect while we have done other things
* with interrupts disabled. */
if (nca_reselect (z))
goto again;
/* Search through the queue for a command
* destined for a target that's not busy. */
for (q=z->queue, prev=0; q; prev=q, q=q->next) {
/* Attempt to establish an I_T_L nexus here. */
if (IS_BUSY (z, q) || ! nca_select (z, q))
continue;
/* Remove the command from the issue queue. */
if (prev)
prev->next = q->next;
else
z->queue = q->next;
q->next = 0;
/* We are connected. Do the task. */
nca_information_transfer (z, q);
goto again;
}
}
void nca_timeout (void *arg)
{
scb_t *scb = (scb_t*) arg;
int unit = scb->xfer->sc_link->adapter_unit;
adapter_t *z = &ncadata[unit];
int x = splbio ();
if (! (scb->xfer->flags & SCSI_NOMASK))
printf ("nca%d/%d/%d (%s%d) timed out\n", unit,
scb->xfer->sc_link->target,
scb->xfer->sc_link->lun,
scb->xfer->sc_link->device->name,
scb->xfer->sc_link->dev_unit);
/* If it has been through before, then a previous abort has failed,
* don't try abort again. */
if (! (scb->flags & SCB_ABORTED)) {
nca_abort (z, scb);
/* 2 seconds for the abort */
timeout (nca_timeout, (caddr_t)scb, 2*hz);
scb->flags |= (SCB_ABORTED | SCB_TIMECHK);
} else {
/* abort timed out */
scb->flags |= SCB_ABORTED;
scb->xfer->retries = 0;
nca_done (z, scb);
}
splx (x);
}
static inline void nca_sendbyte (adapter_t *z, u_char data)
{
outb (z->ODR, data);
outb (z->ICR, ICR_ASSERT_DATA_BUS | ICR_ASSERT_ACK);
WAITFOR (! (inb (z->CSBR) & CSBR_REQ), 10000, "sendbyte");
outb (z->ICR, ICR_ASSERT_DATA_BUS);
}
static inline u_char nca_recvbyte (adapter_t *z)
{
u_char data;
data = inb (z->CSDR);
outb (z->ICR, ICR_ASSERT_ACK);
WAITFOR (! (inb (z->CSBR) & CSBR_REQ), 10000, "recvbyte");
outb (z->ICR, 0);
return (data);
}
/*
* Establish I_T_L or I_T_L_Q nexus for new or existing command
* including ARBITRATION, SELECTION, and initial message out
* for IDENTIFY and queue messages.
* Return 1 if selection succeded.
*/
int nca_select (adapter_t *z, scb_t *scb)
{
/* Set the phase bits to 0, otherwise the NCR5380 won't drive the
* data bus during SELECTION. */
outb (z->TCR, 0);
/* Start arbitration. */
outb (z->ODR, z->scsi_id);
outb (z->MR, MR_ARBITRATE);
/* Wait for arbitration logic to complete (20 usec) */
WAITFOR (inb (z->ICR) & ICR_ARBITRATION_IN_PROGRESS, 200, 0);
if (! (inb (z->ICR) & ICR_ARBITRATION_IN_PROGRESS)) {
PRINT (("nca%d/%d/%d no arbitration progress, bsr=%b csbr=%b\n",
z->sc_link.adapter_unit, scb->xfer->sc_link->target,
scb->xfer->sc_link->lun, inb (z->BSR), BSR_BITS,
inb (z->CSBR), CSBR_BITS));
outb (z->MR, z->parity);
return (0);
}
DELAY (3);
/* Check for lost arbitration. */
if ((inb (z->ICR) & ICR_LOST_ARBITRATION) ||
(inb (z->CSDR) >> 1 >> z->scsi_addr) ||
(inb (z->ICR) & ICR_LOST_ARBITRATION)) {
PRINT (("nca%d/%d/%d arbitration lost\n",
z->sc_link.adapter_unit, scb->xfer->sc_link->target,
scb->xfer->sc_link->lun));
outb (z->MR, z->parity);
return (0);
}
outb (z->ICR, ICR_ASSERT_SEL);
if (inb (z->ICR) & ICR_LOST_ARBITRATION) {
PRINT (("nca%d/%d/%d arbitration lost after SEL\n",
z->sc_link.adapter_unit, scb->xfer->sc_link->target,
scb->xfer->sc_link->lun));
outb (z->ICR, 0);
outb (z->MR, z->parity);
return (0);
}
DELAY (2);
/* Start selection, asserting the host and target ID's on the bus. */
outb (z->SER, 0);
outb (z->ODR, z->scsi_id | (1 << scb->xfer->sc_link->target));
outb (z->ICR, ICR_ASSERT_DATA_BUS | ICR_ASSERT_BSY |
ICR_ASSERT_SEL);
/* Finish arbitration, drop BSY. */
outb (z->MR, 0);
outb (z->ICR, ICR_ASSERT_DATA_BUS | ICR_ASSERT_SEL |
ICR_ASSERT_ATN);
DELAY (1);
/* The SCSI specification calls for a 250 ms timeout for the actual
* selection. */
WAITFOR (inb (z->CSBR) & CSBR_BSY, 100000, 0);
if (! (inb (z->CSBR) & CSBR_BSY)) {
/* The target does not respond. Not an error, though. */
PRINT (("nca%d/%d/%d target does not respond\n",
z->sc_link.adapter_unit, scb->xfer->sc_link->target,
scb->xfer->sc_link->lun));
outb (z->ICR, 0);
outb (z->SER, z->scsi_id);
outb (z->MR, z->parity);
scb->flags |= SCB_TIMEOUT;
return (0);
}
/* Clear SEL and SCSI id.
* Wait for start of REQ/ACK handshake. */
outb (z->ICR, ICR_ASSERT_DATA_BUS | ICR_ASSERT_ATN);
WAITFOR (inb (z->CSBR) & CSBR_REQ, 100000, 0);
if (! (inb (z->CSBR) & CSBR_REQ)) {
PRINT (("nca%d/%d/%d timeout waiting for REQ\n",
z->sc_link.adapter_unit, scb->xfer->sc_link->target,
scb->xfer->sc_link->lun));
outb (z->ICR, 0);
outb (z->SER, z->scsi_id);
outb (z->MR, z->parity);
scb->flags |= SCB_ERROR;
return (0);
}
/* Check for phase mismatch. */
if ((inb (z->CSBR) & PHASE_MASK) != PHASE_MSGOUT) {
/* This should not be taken as an error, but more like
* an unsupported feature!
* Should set a flag indicating that the target don't support
* messages, and continue without failure.
* (THIS IS NOT AN ERROR!) */
PRINT (("nca%d/%d/%d waiting for MSGOUT: invalid phase %s\n",
z->sc_link.adapter_unit, scb->xfer->sc_link->target,
scb->xfer->sc_link->lun,
PHASE_NAME (inb (z->CSBR) & PHASE_MASK)));
outb (z->ICR, 0);
outb (z->SER, z->scsi_id);
outb (z->MR, z->parity);
scb->flags |= SCB_ERROR;
return (0);
}
/* Allow disconnects. */
outb (z->TCR, PHASE_TO_TCR (PHASE_MSGOUT));
outb (z->ICR, ICR_ASSERT_DATA_BUS);
nca_sendbyte (z, MSG_IDENTIFY (scb->xfer->sc_link->lun));
outb (z->ICR, 0);
outb (z->SER, z->scsi_id);
outb (z->MR, z->parity);
SET_BUSY (z, scb);
return (1);
}
int nca_reselect (adapter_t *z)
{
scb_t *q = 0, *prev = 0;
u_char msg, target_mask, lun;
again:
/* Wait for a device to win the reselection phase. */
/* Signals this by asserting the I/O signal. */
if ((inb (z->CSBR) & (CSBR_SEL | CSBR_IO | CSBR_BSY)) !=
(CSBR_SEL | CSBR_IO))
return (0);
/* The data bus contains original initiator id ORed with target id. */
/* See that we really are the initiator. */
target_mask = inb (z->CSDR);
if (! (target_mask & z->scsi_id)) {
PRINT (("nca%d reselect not for me: mask=0x%x, csbr=%b\n",
z->sc_link.adapter_unit, target_mask,
inb (z->CSBR), CSBR_BITS));
goto again;
}
/* Find target who won. */
/* Host responds by asserting the BSY signal. */
/* Target should respond by deasserting the SEL signal. */
target_mask &= ~z->scsi_id;
outb (z->ICR, ICR_ASSERT_BSY);
WAITFOR (! (inb (z->CSBR) & CSBR_SEL), 10000, "SEL deassert");
/* Remove the busy status. */
/* Target should set the MSGIN phase. */
outb (z->ICR, 0);
WAITFOR (inb (z->CSBR) & CSBR_REQ, 10000, "MSGIN");
/* Hope we get an IDENTIFY message. */
msg = nca_msg_input (z);
if (MSG_ISIDENT (msg)) {
/* Find the command corresponding to the I_T_L or I_T_L_Q
* nexus we just restablished, and remove it from
* the disconnected queue. */
lun = (msg & 7);
for (q=z->disconnected_queue; q; prev=q, q=q->next) {
if (target_mask != (1 << q->xfer->sc_link->target))
continue;
if (lun != q->xfer->sc_link->lun)
continue;
if (prev)
prev->next = q->next;
else
z->disconnected_queue = q->next;
q->next = 0;
PRINT (("nca%d/%d/%d reselect done\n",
z->sc_link.adapter_unit,
ffs (target_mask) - 1, lun));
nca_information_transfer (z, q);
WAITFOR (! (inb (z->CSBR) & CSBR_BSY), 100000, "reselect !busy");
return (1);
}
} else
printf ("nca%d reselect: expecting IDENTIFY, got 0x%x\n",
z->sc_link.adapter_unit, msg);
/* Since we have an established nexus that we can't
* do anything with, we must abort it. */
nca_send_abort (z);
PRINT (("nca%d reselect aborted\n", z->sc_link.adapter_unit));
WAITFOR (! (inb (z->CSBR) & CSBR_BSY), 100000, "reselect abort !busy");
goto again;
}
/*
* Send an abort to the target.
* Return 1 success, 0 on failure.
* Called on splbio level.
*/
int nca_abort (adapter_t *z, scb_t *scb)
{
scb_t *q, **prev;
/* If the command hasn't been issued yet, we simply remove it
* from the issue queue. */
prev = &z->queue;
for (q=z->queue; q; q=q->next) {
if (scb == q) {
(*prev) = q->next;
q->next = 0;
return (1);
}
prev = &q->next;
}
/* If the command is currently disconnected from the bus,
* we reconnect the I_T_L or I_T_L_Q nexus associated with it,
* go into message out, and send an abort message. */
for (q=z->disconnected_queue; q; q=q->next) {
if (scb != q)
continue;
if (! nca_select (z, scb))
return (0);
nca_send_abort (z);
prev = &z->disconnected_queue;
for (q=z->disconnected_queue; q; q=q->next) {
if (scb == q) {
*prev = q->next;
q->next = 0;
/* Set some type of error result
* for the operation. */
return (1);
}
prev = &q->next;
}
}
/* Command not found in any queue. */
return (0);
}
/*
* The task accomplished, mark the i/o control block as done.
* Always called with interrupts disabled.
*/
void nca_done (adapter_t *z, scb_t *scb)
{
struct scsi_xfer *xs = scb->xfer;
if (scb->flags & SCB_TIMECHK)
untimeout (nca_timeout, (caddr_t) scb);
/* How much of the buffer was not touched. */
xs->resid = scb->datalen;
if (scb->flags != SCB_ACTIVE && ! (xs->flags & SCSI_ERR_OK))
if (scb->flags & (SCB_TIMEOUT | SCB_ABORTED))
xs->error = XS_TIMEOUT;
else if (scb->flags & SCB_ERROR)
xs->error = XS_DRIVER_STUFFUP;
else if (scb->flags & SCB_TBUSY)
xs->error = XS_BUSY;
else if (scb->flags & SCB_SENSE)
xs->error = XS_SENSE;
xs->flags |= ITSDONE;
/* Free the control block. */
scb->next = z->free_scb;
z->free_scb = scb;
scb->flags = SCB_FREE;
/* If there were none, wake anybody waiting for one to come free,
* starting with queued entries. */
if (! scb->next)
wakeup ((caddr_t) &z->free_scb);
scsi_done (xs);
}
/*
* Wait for completion of command in polled mode.
* Always called with interrupts masked out.
*/
int nca_poll (adapter_t *z, scb_t *scb)
{
int count;
for (count=0; count<30; ++count) {
DELAY (1000); /* delay for a while */
nca_start (z); /* retry operation */
if (scb->xfer->flags & ITSDONE)
return (1); /* all is done */
if (scb->flags & SCB_TIMEOUT)
return (0); /* no target present */
}
return (0);
}
/*
* Perform NCR-53C400 pseudo-dma data transfer.
*/
void nca_53400_dma_xfer (adapter_t *z, int read, u_char **pdata, u_long *plen)
{
/* Set dma direction. */
outb (z->CSR, read ? CSR_TRANSFER_DIRECTION : 0);
/* Enable dma mode. */
outb (z->MR, MR_DMA_MODE | (read ? z->parity : 0));
/* Start dma transfer. */
outb (read ? z->SDIR : z->SDSR, 0);
/* Set up clock counter. */
outb (z->CCR, *plen/128);
for (; *plen>=128; *plen-=128, *pdata+=128) {
/* Wait for 53C400 host buffer ready. */
WAITFOR (! (inb (z->CSR) & CSR_HOST_BUF_NOT_READY), 100000, 0);
if (inb (z->CSR) & CSR_HOST_BUF_NOT_READY)
break;
/* Transfer 128 bytes of data. */
if (read)
insw (z->HBR, *pdata, 64);
else
outsw (z->HBR, *pdata, 64);
}
/* Wait for 5380 registers ready. */
WAITFOR (inb (z->CSR) & CSR_5380_ENABLE, 10000, 0);
if (! (inb (z->CSR) & CSR_5380_ENABLE)) {
/* Reset 53C400. */
PRINT (("nca%d: reset: pseudo-dma incomplete, csr=%b\n",
z->sc_link.adapter_unit, inb (z->CSR), CSR_BITS));
outb (z->CSR, CSR_5380_ENABLE);
outb (z->CSR, 0);
}
/* Wait for FIFO flush on write. */
if (! read)
WAITFOR (inb (z->TCR) & TCR_LAST_BYTE_SENT, 10000, "last byte");
/* Clear dma mode. */
outb (z->MR, z->parity);
/* Re-enable interrupts. */
outb (z->CSR, z->irq ? CSR_5380_INTR : 0);
}
/*
* Perform PAS-16 pseudo-dma data transfer.
*/
void nca_pas_dma_xfer (adapter_t *z, int read, u_char **pdata, u_long *plen)
{
/* Enable dma mode. */
outb (z->MR, MR_DMA_MODE | (read ? z->parity : 0));
/* Start dma transfer. */
outb (read ? z->SDIR : z->SDSR, 0);
for (; *plen>=512; *plen-=512, *pdata+=512) {
/* Wait for pseudo-DMA request. */
WAITFOR (inb (z->PSTAT) & PAS16_STAT_DREQ, 10000, "pseudo-dma");
if (! (inb (z->PSTAT) & PAS16_STAT_DREQ))
break;
/* Transfer 512 bytes of data. */
if (read)
insb (z->PDATA, *pdata, 512);
else
outsb (z->PDATA, *pdata, 512);
}
/* Clear dma mode. */
outb (z->MR, z->parity);
}
/*
* Send data to the target.
*/
void nca_data_output (adapter_t *z, u_char **pdata, u_long *plen)
{
u_char *data = *pdata;
u_long len = *plen;
outb (z->ICR, ICR_ASSERT_DATA_BUS);
if (z->type == CTLR_NCR_53C400 && len%128 == 0)
/* Use NCR-53C400 pseudo-dma for data transfer. */
nca_53400_dma_xfer (z, 0, &data, &len);
else if (z->type == CTLR_PAS_16 && len%512 == 0)
/* Use PAS-16 pseudo-dma for data transfer. */
nca_pas_dma_xfer (z, 0, &data, &len);
else
for (;;) {
/* Check SCSI bus phase. */
u_char s = inb (z->CSBR) ^ (CSBR_BSY | PHASE_DATAOUT);
if (s & (CSBR_BSY | PHASE_MASK))
break;
/* Wait for REQ. */
if (! (s & CSBR_REQ))
continue;
/* Output data. */
outb (z->ODR, *data++);
/* Assert ACK and wait for REQ deassert,
* with irqs disabled. */
disable_intr ();
outb (z->ICR, ICR_ASSERT_ACK | ICR_ASSERT_DATA_BUS);
WAITFOR (! (inb (z->CSBR) & CSBR_REQ), 1000, 0);
enable_intr ();
/* Deassert ACK. */
outb (z->ICR, ICR_ASSERT_DATA_BUS);
--len;
}
outb (z->ICR, 0);
PRINT (("nca (DATAOUT) send %ld bytes\n", *plen - len));
*plen = len;
*pdata = data;
}
/*
* Receive data from the target.
*/
void nca_data_input (adapter_t *z, u_char **pdata, u_long *plen)
{
u_char *data = *pdata;
u_long len = *plen;
if (z->type == CTLR_NCR_53C400 && len%128 == 0)
/* Use NCR-53C400 pseudo-dma for data transfer. */
nca_53400_dma_xfer (z, 1, &data, &len);
else if (z->type == CTLR_PAS_16 && len%512 == 0)
/* Use PAS-16 pseudo-dma for data transfer. */
nca_pas_dma_xfer (z, 1, &data, &len);
else
for (;;) {
/* Check SCSI bus phase. */
u_char s = inb (z->CSBR) ^ (CSBR_BSY | PHASE_DATAIN);
if (s & (CSBR_BSY | PHASE_MASK))
break;
/* Wait for REQ. */
if (! (s & CSBR_REQ))
continue;
/* Input data. */
*data++ = inb (z->CSDR);
/* Assert ACK and wait for REQ deassert,
* with irqs disabled. */
disable_intr ();
outb (z->ICR, ICR_ASSERT_ACK);
WAITFOR (! (inb (z->CSBR) & CSBR_REQ), 1000, 0);
enable_intr ();
/* Deassert ACK. */
outb (z->ICR, 0);
--len;
}
PRINT (("nca (DATAIN) got %ld bytes\n", *plen - len));
*plen = len;
*pdata = data;
}
/*
* Send the command to the target.
*/
void nca_cmd_output (adapter_t *z, u_char *cmd, int cmdlen)
{
PRINT (("nca%d send command (%d bytes) ", z->sc_link.adapter_unit,
cmdlen));
outb (z->ICR, ICR_ASSERT_DATA_BUS);
while (cmdlen) {
/* Check for target disconnect. */
u_char sts = inb (z->CSBR);
if (! (sts & CSBR_BSY))
break;
/* Check for phase mismatch. */
if ((sts & PHASE_MASK) != PHASE_CMDOUT) {
printf ("nca: sending command: invalid phase %s\n",
PHASE_NAME (sts & PHASE_MASK));
break;
}
/* Wait for REQ. */
if (! (sts & CSBR_REQ))
continue;
PRINT (("-%x", *cmd));
nca_sendbyte (z, *cmd++);
--cmdlen;
}
outb (z->ICR, 0);
PRINT (("\n"));
}
/*
* Send the message to the target.
*/
void nca_send_abort (adapter_t *z)
{
u_char sts;
outb (z->ICR, ICR_ASSERT_ATN);
/* Wait for REQ, after which the phase bits will be valid. */
WAITFOR (inb (z->CSBR) & CSBR_REQ, 1000000, "abort message");
sts = inb (z->CSBR);
if (! (sts & CSBR_REQ))
goto ret;
/* Check for phase mismatch. */
if ((sts & PHASE_MASK) != PHASE_MSGOUT) {
printf ("nca: sending MSG_ABORT: invalid phase %s\n",
PHASE_NAME (sts & PHASE_MASK));
goto ret;
}
outb (z->ICR, ICR_ASSERT_DATA_BUS);
outb (z->TCR, PHASE_TO_TCR (PHASE_MSGOUT));
nca_sendbyte (z, MSG_ABORT);
PRINT (("nca%d send MSG_ABORT\n", z->sc_link.adapter_unit));
ret: outb (z->ICR, 0);
}
/*
* Get the message from the target.
* Return the length of the received message.
*/
u_char nca_msg_input (adapter_t *z)
{
u_char sts, msg;
/* Wait for REQ, after which the phase bits will be valid. */
WAITFOR (inb (z->CSBR) & CSBR_REQ, 1000000, "message input");
sts = inb (z->CSBR);
if (! (sts & CSBR_REQ))
return (MSG_ABORT);
/* Check for phase mismatch.
* Reached if the target decides that it has finished the transfer. */
if ((sts & PHASE_MASK) != PHASE_MSGIN) {
printf ("nca: sending message: invalid phase %s\n",
PHASE_NAME (sts & PHASE_MASK));
return (MSG_ABORT);
}
/* Do actual transfer from SCSI bus to memory. */
outb (z->TCR, PHASE_TO_TCR (PHASE_MSGIN));
msg = nca_recvbyte (z);
PRINT (("nca%d (MSG_INPUT) got 0x%x\n", z->sc_link.adapter_unit, msg));
return (msg);
}
/*
* Send request-sense op to the target.
* Return 1 success, 0 on failure.
* Called on splbio level.
*/
int nca_sense (adapter_t *z, scb_t *scb)
{
u_char cmd[6], status, msg, *data;
u_long len;
/* Wait for target to disconnect. */
WAITFOR (! (inb (z->CSBR) & CSBR_BSY), 100000, "sense bus free");
if (inb (z->CSBR) & CSBR_BSY)
return (0);
/* Select the target again. */
if (! nca_select (z, scb))
return (0);
/* Wait for CMDOUT phase. */
WAITFOR (inb (z->CSBR) & CSBR_REQ, 100000, "sense CMDOUT");
if (! (inb (z->CSBR) & CSBR_REQ) ||
(inb (z->CSBR) & PHASE_MASK) != PHASE_CMDOUT)
return (0);
outb (z->TCR, PHASE_TO_TCR (PHASE_CMDOUT));
/* Send command. */
len = sizeof (scb->xfer->sense);
cmd[0] = REQUEST_SENSE;
cmd[1] = scb->xfer->sc_link->lun << 5;
cmd[2] = 0;
cmd[3] = 0;
cmd[4] = len;
cmd[5] = 0;
nca_cmd_output (z, cmd, sizeof (cmd));
/* Wait for DATAIN phase. */
WAITFOR (inb (z->CSBR) & CSBR_REQ, 100000, "sense DATAIN");
if (! (inb (z->CSBR) & CSBR_REQ) ||
(inb (z->CSBR) & PHASE_MASK) != PHASE_DATAIN)
return (0);
outb (z->TCR, PHASE_TO_TCR (PHASE_DATAIN));
data = (u_char*) &scb->xfer->sense;
nca_data_input (z, &data, &len);
PRINT (("nca%d sense %x-%x-%x-%x-%x-%x-%x-%x\n",
z->sc_link.adapter_unit, scb->xfer->sense.error_code,
scb->xfer->sense.ext.extended.segment,
scb->xfer->sense.ext.extended.flags,
scb->xfer->sense.ext.extended.info[0],
scb->xfer->sense.ext.extended.info[1],
scb->xfer->sense.ext.extended.info[2],
scb->xfer->sense.ext.extended.info[3],
scb->xfer->sense.ext.extended.extra_len));
/* Wait for STATIN phase. */
WAITFOR (inb (z->CSBR) & CSBR_REQ, 100000, "sense STATIN");
if (! (inb (z->CSBR) & CSBR_REQ) ||
(inb (z->CSBR) & PHASE_MASK) != PHASE_STATIN)
return (0);
outb (z->TCR, PHASE_TO_TCR (PHASE_STATIN));
status = nca_recvbyte (z);
/* Wait for MSGIN phase. */
WAITFOR (inb (z->CSBR) & CSBR_REQ, 100000, "sense MSGIN");
if (! (inb (z->CSBR) & CSBR_REQ) ||
(inb (z->CSBR) & PHASE_MASK) != PHASE_MSGIN)
return (0);
outb (z->TCR, PHASE_TO_TCR (PHASE_MSGIN));
msg = nca_recvbyte (z);
if (status != 0 || msg != 0)
printf ("nca%d: bad sense status=0x%x, msg=0x%x\n",
z->sc_link.adapter_unit, status, msg);
return (1);
}
/*
* Do the transfer. We know we are connected. Update the flags,
* call nca_done when task accomplished. Dialog controlled by the target.
* Always called with interrupts disabled.
*/
void nca_information_transfer (adapter_t *z, scb_t *scb)
{
u_char *data = scb->data; /* current data buffer */
u_long datalen = scb->datalen; /* current data transfer size */
register u_char sts;
u_char msg;
while ((sts = inb (z->CSBR)) & CSBR_BSY) {
/* We only have a valid SCSI phase when REQ is asserted. */
if (! (sts & CSBR_REQ))
continue;
if (inb (z->BSR) & BSR_PARITY_ERROR) {
int target = scb->xfer->sc_link->target;
if (++z->target[target].perrcnt <= 8)
printf ("nca%d/%d/%d parity error\n",
z->sc_link.adapter_unit, target,
scb->xfer->sc_link->lun);
if (z->target[target].perrcnt == 8)
printf ("nca%d/%d/%d too many parity errors, not logging any more\n",
z->sc_link.adapter_unit, target,
scb->xfer->sc_link->lun);
/* Clear parity error. */
inb (z->RPIR);
}
outb (z->TCR, PHASE_TO_TCR (sts & PHASE_MASK));
switch (sts & PHASE_MASK) {
case PHASE_DATAOUT:
if (datalen <= 0) {
printf ("nca%d/%d/%d data length underflow\n",
z->sc_link.adapter_unit,
scb->xfer->sc_link->target,
scb->xfer->sc_link->lun);
/* send zero byte */
outb (z->ICR, ICR_ASSERT_DATA_BUS);
nca_sendbyte (z, 0);
outb (z->ICR, 0);
break;
}
nca_data_output (z, &data, &datalen);
break;
case PHASE_DATAIN:
if (datalen <= 0) {
/* Get extra data. Some devices (e.g. CDROMs)
* use fixed-length blocks (e.g. 2k),
* even if we need less. */
PRINT (("@"));
nca_recvbyte (z);
break;
}
nca_data_input (z, &data, &datalen);
break;
case PHASE_CMDOUT:
nca_cmd_output (z, (u_char*) scb->xfer->cmd,
scb->xfer->cmdlen);
break;
case PHASE_STATIN:
scb->xfer->status = nca_recvbyte (z);
PRINT (("nca%d/%d/%d (STATIN) got 0x%x\n",
z->sc_link.adapter_unit,
scb->xfer->sc_link->target,
scb->xfer->sc_link->lun,
(u_char) scb->xfer->status));
break;
case PHASE_MSGOUT:
/* Send no-op message. */
outb (z->ICR, ICR_ASSERT_DATA_BUS);
nca_sendbyte (z, MSG_NOP);
outb (z->ICR, 0);
PRINT (("nca%d/%d/%d (MSGOUT) send NOP\n",
z->sc_link.adapter_unit,
scb->xfer->sc_link->target,
scb->xfer->sc_link->lun));
break;
case PHASE_MSGIN:
/* Don't handle multi-byte messages here, because they
* should not be present here. */
msg = nca_recvbyte (z);
PRINT (("nca%d/%d/%d (MSGIN) got 0x%x\n",
z->sc_link.adapter_unit,
scb->xfer->sc_link->target,
scb->xfer->sc_link->lun, msg));
switch (msg) {
case MSG_COMMAND_COMPLETE:
scb->data = data;
scb->datalen = datalen;
/* In the case of check-condition status,
* perform the request-sense op. */
switch (scb->xfer->status & 0x1e) {
case SCSI_CHECK:
if (nca_sense (z, scb))
scb->flags = SCB_SENSE;
break;
case SCSI_BUSY:
scb->flags = SCB_TBUSY;
break;
}
goto done;
case MSG_ABORT:
printf ("nca: command aborted by target\n");
scb->flags = SCB_ABORTED;
goto done;
case MSG_MESSAGE_REJECT:
printf ("nca: message rejected\n");
scb->flags = SCB_ABORTED;
goto done;
case MSG_DISCONNECT:
scb->next = z->disconnected_queue;
z->disconnected_queue = scb;
if (! z->irq && ! z->timeout_active) {
timeout (nca_tick, z, 1);
z->timeout_active = 1;
}
PRINT (("nca%d/%d/%d disconnected\n",
z->sc_link.adapter_unit,
scb->xfer->sc_link->target,
scb->xfer->sc_link->lun));
goto ret;
case MSG_SAVE_POINTERS:
scb->data = data;
scb->datalen = datalen;
break;
case MSG_RESTORE_POINTERS:
data = scb->data;
datalen = scb->datalen;
break;
default:
printf ("nca%d/%d/%d unknown message: 0x%x\n",
z->sc_link.adapter_unit,
scb->xfer->sc_link->target,
scb->xfer->sc_link->lun, msg);
break;
}
break;
default:
printf ("nca: unknown phase: %b\n", sts, CSBR_BITS);
break;
}
}
printf ("nca%d/%d/%d unexpected target disconnect\n",
z->sc_link.adapter_unit, scb->xfer->sc_link->target,
scb->xfer->sc_link->lun);
scb->flags = SCB_ERROR;
done:
CLEAR_BUSY (z, scb);
nca_done (z, scb);
ret:
outb (z->ICR, 0);
outb (z->TCR, 0);
outb (z->SER, z->scsi_id);
WAITFOR (! (inb (z->CSBR) & CSBR_BSY), 100000, "xfer bus free");
}
#endif /* NNCA */
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