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8ad280f815
NetBSD/sys/dev/ic/adw.c
thorpej fc96443d15 New callout mechanism with two major improvements over the old 
timeout()/untimeout() API:
- Clients supply callout handle storage, thus eliminating problems of
  resource allocation.
- Insertion and removal of callouts is constant time, important as
  this facility is used quite a lot in the kernel.

The old timeout()/untimeout() API has been removed from the kernel.
2000-03-23 07:01:25 +00:00

1220 lines
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/* $NetBSD: adw.c,v 1.15 2000/03/23 07:01:28 thorpej Exp $ */
/*
* Generic driver for the Advanced Systems Inc. SCSI controllers
*
* Copyright (c) 1998, 1999, 2000 The NetBSD Foundation, Inc.
* All rights reserved.
*
* Author: Baldassare Dante Profeta <dante@mclink.it>
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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.
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/callout.h>
#include <sys/kernel.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/buf.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <machine/bus.h>
#include <machine/intr.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/pmap.h>
#include <dev/scsipi/scsi_all.h>
#include <dev/scsipi/scsipi_all.h>
#include <dev/scsipi/scsiconf.h>
#include <dev/ic/adwlib.h>
#include <dev/ic/adw.h>
#ifndef DDB
#define Debugger() panic("should call debugger here (adw.c)")
#endif /* ! DDB */
/******************************************************************************/
static int adw_alloc_controls __P((ADW_SOFTC *));
static int adw_alloc_carriers __P((ADW_SOFTC *));
static int adw_create_carriers __P((ADW_SOFTC *));
static int adw_init_carrier __P((ADW_SOFTC *, ADW_CARRIER *));
static int adw_create_ccbs __P((ADW_SOFTC *, ADW_CCB *, int));
static void adw_free_ccb __P((ADW_SOFTC *, ADW_CCB *));
static void adw_reset_ccb __P((ADW_CCB *));
static int adw_init_ccb __P((ADW_SOFTC *, ADW_CCB *));
static ADW_CCB *adw_get_ccb __P((ADW_SOFTC *, int));
static int adw_queue_ccb __P((ADW_SOFTC *, ADW_CCB *, int));
static int adw_scsi_cmd __P((struct scsipi_xfer *));
static int adw_build_req __P((struct scsipi_xfer *, ADW_CCB *, int));
static void adw_build_sglist __P((ADW_CCB *, ADW_SCSI_REQ_Q *, ADW_SG_BLOCK *));
static void adwminphys __P((struct buf *));
static void adw_isr_callback __P((ADW_SOFTC *, ADW_SCSI_REQ_Q *));
static void adw_async_callback __P((ADW_SOFTC *, u_int8_t));
static int adw_poll __P((ADW_SOFTC *, struct scsipi_xfer *, int));
static void adw_timeout __P((void *));
/******************************************************************************/
/* the below structure is so we have a default dev struct for out link struct */
struct scsipi_device adw_dev =
{
NULL, /* Use default error handler */
NULL, /* have a queue, served by this */
NULL, /* have no async handler */
NULL, /* Use default 'done' routine */
};
#define ADW_ABORT_TIMEOUT 10000 /* time to wait for abort (mSec) */
#define ADW_WATCH_TIMEOUT 10000 /* time to wait for watchdog (mSec) */
/******************************************************************************/
/* Control Blocks routines */
/******************************************************************************/
static int
adw_alloc_controls(sc)
ADW_SOFTC *sc;
{
bus_dma_segment_t seg;
int error, rseg;
/*
* Allocate the control structure.
*/
if ((error = bus_dmamem_alloc(sc->sc_dmat, sizeof(struct adw_control),
NBPG, 0, &seg, 1, &rseg, BUS_DMA_NOWAIT)) != 0) {
printf("%s: unable to allocate control structures,"
" error = %d\n", sc->sc_dev.dv_xname, error);
return (error);
}
if ((error = bus_dmamem_map(sc->sc_dmat, &seg, rseg,
sizeof(struct adw_control), (caddr_t *) & sc->sc_control,
BUS_DMA_NOWAIT | BUS_DMA_COHERENT)) != 0) {
printf("%s: unable to map control structures, error = %d\n",
sc->sc_dev.dv_xname, error);
return (error);
}
/*
* Create and load the DMA map used for the control blocks.
*/
if ((error = bus_dmamap_create(sc->sc_dmat, sizeof(struct adw_control),
1, sizeof(struct adw_control), 0, BUS_DMA_NOWAIT,
&sc->sc_dmamap_control)) != 0) {
printf("%s: unable to create control DMA map, error = %d\n",
sc->sc_dev.dv_xname, error);
return (error);
}
if ((error = bus_dmamap_load(sc->sc_dmat, sc->sc_dmamap_control,
sc->sc_control, sizeof(struct adw_control), NULL,
BUS_DMA_NOWAIT)) != 0) {
printf("%s: unable to load control DMA map, error = %d\n",
sc->sc_dev.dv_xname, error);
return (error);
}
return (0);
}
static int
adw_alloc_carriers(sc)
ADW_SOFTC *sc;
{
bus_dma_segment_t seg;
int error, rseg;
/*
* Allocate the control structure.
*/
sc->sc_control->carriers = malloc(ADW_CARRIER_SIZE * ADW_MAX_CARRIER,
M_DEVBUF, M_WAITOK);
if(!sc->sc_control->carriers) {
printf("%s: malloc() failed in allocating carrier structures,"
" error = %d\n", sc->sc_dev.dv_xname, error);
return (error);
}
if ((error = bus_dmamem_alloc(sc->sc_dmat,
ADW_CARRIER_SIZE * ADW_MAX_CARRIER,
NBPG, 0, &seg, 1, &rseg, BUS_DMA_NOWAIT)) != 0) {
printf("%s: unable to allocate carrier structures,"
" error = %d\n", sc->sc_dev.dv_xname, error);
return (error);
}
if ((error = bus_dmamem_map(sc->sc_dmat, &seg, rseg,
ADW_CARRIER_SIZE * ADW_MAX_CARRIER,
(caddr_t *) &sc->sc_control->carriers,
BUS_DMA_NOWAIT | BUS_DMA_COHERENT)) != 0) {
printf("%s: unable to map carrier structures,"
" error = %d\n", sc->sc_dev.dv_xname, error);
return (error);
}
/*
* Create and load the DMA map used for the control blocks.
*/
if ((error = bus_dmamap_create(sc->sc_dmat,
ADW_CARRIER_SIZE * ADW_MAX_CARRIER, 1,
ADW_CARRIER_SIZE * ADW_MAX_CARRIER, 0, BUS_DMA_NOWAIT,
&sc->sc_dmamap_carrier)) != 0) {
printf("%s: unable to create carriers DMA map,"
" error = %d\n", sc->sc_dev.dv_xname, error);
return (error);
}
if ((error = bus_dmamap_load(sc->sc_dmat,
sc->sc_dmamap_carrier, sc->sc_control->carriers,
ADW_CARRIER_SIZE * ADW_MAX_CARRIER, NULL,
BUS_DMA_NOWAIT)) != 0) {
printf("%s: unable to load carriers DMA map,"
" error = %d\n", sc->sc_dev.dv_xname, error);
return (error);
}
error = bus_dmamap_create(sc->sc_dmat, ADW_CARRIER_SIZE* ADW_MAX_CARRIER,
1, ADW_CARRIER_SIZE * ADW_MAX_CARRIER,
0, BUS_DMA_NOWAIT | BUS_DMA_ALLOCNOW,
&sc->sc_control->dmamap_xfer);
if (error) {
printf("%s: unable to create Carrier DMA map, error = %d\n",
sc->sc_dev.dv_xname, error);
return (error);
}
return (0);
}
/*
* Create a set of Carriers and add them to the free list. Called once
* by adw_init(). We return the number of Carriers successfully created.
*/
static int
adw_create_carriers(sc)
ADW_SOFTC *sc;
{
ADW_CARRIER *carr;
u_int32_t carr_next = NULL;
int i, error;
for(i=0; i < ADW_MAX_CARRIER; i++) {
carr = (ADW_CARRIER *)(((u_int8_t *)sc->sc_control->carriers) +
(ADW_CARRIER_SIZE * i));
if ((error = adw_init_carrier(sc, carr)) != 0) {
printf("%s: unable to initialize carrier, error = %d\n",
sc->sc_dev.dv_xname, error);
return (i);
}
carr->next_vpa = carr_next;
carr_next = carr->carr_pa;
carr->id = i;
}
sc->carr_freelist = carr;
return (i);
}
static int
adw_init_carrier(sc, carr)
ADW_SOFTC *sc;
ADW_CARRIER *carr;
{
u_int32_t carr_pa;
int /*error, */hashnum;
/*
* Create the DMA map for all of the Carriers.
*/
/* error = bus_dmamap_create(sc->sc_dmat, ADW_CARRIER_SIZE,
1, ADW_CARRIER_SIZE,
0, BUS_DMA_NOWAIT | BUS_DMA_ALLOCNOW,
&carr->dmamap_xfer);
if (error) {
printf("%s: unable to create Carrier DMA map, error = %d\n",
sc->sc_dev.dv_xname, error);
return (error);
}
*/
/*
* put in the phystokv hash table
* Never gets taken out.
*/
carr_pa = ADW_CARRIER_ADDR(sc, carr);
carr->carr_pa = carr_pa;
hashnum = CARRIER_HASH(carr_pa);
carr->nexthash = sc->sc_carrhash[hashnum];
sc->sc_carrhash[hashnum] = carr;
return(0);
}
/*
* Given a physical address, find the Carrier that it corresponds to.
*/
ADW_CARRIER *
adw_carrier_phys_kv(sc, carr_phys)
ADW_SOFTC *sc;
u_int32_t carr_phys;
{
int hashnum = CARRIER_HASH(carr_phys);
ADW_CARRIER *carr = sc->sc_carrhash[hashnum];
while (carr) {
if (carr->carr_pa == carr_phys)
break;
carr = carr->nexthash;
}
return (carr);
}
/*
* Create a set of ccbs and add them to the free list. Called once
* by adw_init(). We return the number of CCBs successfully created.
*/
static int
adw_create_ccbs(sc, ccbstore, count)
ADW_SOFTC *sc;
ADW_CCB *ccbstore;
int count;
{
ADW_CCB *ccb;
int i, error;
for (i = 0; i < count; i++) {
ccb = &ccbstore[i];
if ((error = adw_init_ccb(sc, ccb)) != 0) {
printf("%s: unable to initialize ccb, error = %d\n",
sc->sc_dev.dv_xname, error);
return (i);
}
TAILQ_INSERT_TAIL(&sc->sc_free_ccb, ccb, chain);
}
return (i);
}
/*
* A ccb is put onto the free list.
*/
static void
adw_free_ccb(sc, ccb)
ADW_SOFTC *sc;
ADW_CCB *ccb;
{
int s;
s = splbio();
adw_reset_ccb(ccb);
TAILQ_INSERT_HEAD(&sc->sc_free_ccb, ccb, chain);
/*
* If there were none, wake anybody waiting for one to come free,
* starting with queued entries.
*/
if (ccb->chain.tqe_next == 0)
wakeup(&sc->sc_free_ccb);
splx(s);
}
static void
adw_reset_ccb(ccb)
ADW_CCB *ccb;
{
ccb->flags = 0;
}
static int
adw_init_ccb(sc, ccb)
ADW_SOFTC *sc;
ADW_CCB *ccb;
{
int hashnum, error;
/*
* Create the DMA map for this CCB.
*/
error = bus_dmamap_create(sc->sc_dmat,
(ADW_MAX_SG_LIST - 1) * PAGE_SIZE,
ADW_MAX_SG_LIST, (ADW_MAX_SG_LIST - 1) * PAGE_SIZE,
0, BUS_DMA_NOWAIT | BUS_DMA_ALLOCNOW, &ccb->dmamap_xfer);
if (error) {
printf("%s: unable to create CCB DMA map, error = %d\n",
sc->sc_dev.dv_xname, error);
return (error);
}
/*
* put in the phystokv hash table
* Never gets taken out.
*/
ccb->hashkey = sc->sc_dmamap_control->dm_segs[0].ds_addr +
ADW_CCB_OFF(ccb);
hashnum = CCB_HASH(ccb->hashkey);
ccb->nexthash = sc->sc_ccbhash[hashnum];
sc->sc_ccbhash[hashnum] = ccb;
adw_reset_ccb(ccb);
return (0);
}
/*
* Get a free ccb
*
* If there are none, see if we can allocate a new one
*/
static ADW_CCB *
adw_get_ccb(sc, flags)
ADW_SOFTC *sc;
int flags;
{
ADW_CCB *ccb = 0;
int s;
s = splbio();
/*
* If we can and have to, sleep waiting for one to come free
* but only if we can't allocate a new one.
*/
for (;;) {
ccb = sc->sc_free_ccb.tqh_first;
if (ccb) {
TAILQ_REMOVE(&sc->sc_free_ccb, ccb, chain);
break;
}
if ((flags & XS_CTL_NOSLEEP) != 0)
goto out;
tsleep(&sc->sc_free_ccb, PRIBIO, "adwccb", 0);
}
ccb->flags |= CCB_ALLOC;
out:
splx(s);
return (ccb);
}
/*
* Given a physical address, find the ccb that it corresponds to.
*/
ADW_CCB *
adw_ccb_phys_kv(sc, ccb_phys)
ADW_SOFTC *sc;
u_int32_t ccb_phys;
{
int hashnum = CCB_HASH(ccb_phys);
ADW_CCB *ccb = sc->sc_ccbhash[hashnum];
while (ccb) {
if (ccb->hashkey == ccb_phys)
break;
ccb = ccb->nexthash;
}
return (ccb);
}
/*
* Queue a CCB to be sent to the controller, and send it if possible.
*/
static int
adw_queue_ccb(sc, ccb, retry)
ADW_SOFTC *sc;
ADW_CCB *ccb;
int retry;
{
int errcode;
if(!retry)
TAILQ_INSERT_TAIL(&sc->sc_waiting_ccb, ccb, chain);
while ((ccb = sc->sc_waiting_ccb.tqh_first) != NULL) {
errcode = AdvExeScsiQueue(sc, &ccb->scsiq);
switch(errcode) {
case ADW_SUCCESS:
break;
case ADW_BUSY:
printf("ADW_BUSY\n");
return(ADW_BUSY);
case ADW_ERROR:
printf("ADW_ERROR\n");
TAILQ_REMOVE(&sc->sc_waiting_ccb, ccb, chain);
return(ADW_ERROR);
}
TAILQ_REMOVE(&sc->sc_waiting_ccb, ccb, chain);
if ((ccb->xs->xs_control & XS_CTL_POLL) == 0)
callout_reset(&ccb->xs->xs_callout,
(ccb->timeout * hz) / 1000, adw_timeout, ccb);
}
return(errcode);
}
/******************************************************************************/
/* SCSI layer interfacing routines */
/******************************************************************************/
int
adw_init(sc)
ADW_SOFTC *sc;
{
u_int16_t warn_code;
sc->cfg.lib_version = (ADW_LIB_VERSION_MAJOR << 8) |
ADW_LIB_VERSION_MINOR;
sc->cfg.chip_version =
ADW_GET_CHIP_VERSION(sc->sc_iot, sc->sc_ioh, sc->bus_type);
/*
* Reset the chip to start and allow register writes.
*/
if (ADW_FIND_SIGNATURE(sc->sc_iot, sc->sc_ioh) == 0) {
panic("adw_init: adw_find_signature failed");
} else {
AdvResetChip(sc->sc_iot, sc->sc_ioh);
warn_code = (sc->chip_type == ADV_CHIP_ASC3550)?
AdvInitFrom3550EEP(sc) :
AdvInitFrom38C0800EEP(sc);
if (warn_code & ASC_WARN_EEPROM_CHKSUM)
printf("%s: Bad checksum found. "
"Setting default values\n",
sc->sc_dev.dv_xname);
if (warn_code & ASC_WARN_EEPROM_TERMINATION)
printf("%s: Bad bus termination setting."
"Using automatic termination.\n",
sc->sc_dev.dv_xname);
}
sc->isr_callback = (ADW_CALLBACK) adw_isr_callback;
sc->async_callback = (ADW_CALLBACK) adw_async_callback;
return (0);
}
void
adw_attach(sc)
ADW_SOFTC *sc;
{
int i, error;
TAILQ_INIT(&sc->sc_free_ccb);
TAILQ_INIT(&sc->sc_waiting_ccb);
TAILQ_INIT(&sc->sc_queue);
/*
* Allocate the Control Blocks.
*/
error = adw_alloc_controls(sc);
if (error)
return; /* (error) */ ;
bzero(sc->sc_control, sizeof(struct adw_control));
/*
* Create and initialize the Control Blocks.
*/
i = adw_create_ccbs(sc, sc->sc_control->ccbs, ADW_MAX_CCB);
if (i == 0) {
printf("%s: unable to create Control Blocks\n",
sc->sc_dev.dv_xname);
return; /* (ENOMEM) */ ;
} else if (i != ADW_MAX_CCB) {
printf("%s: WARNING: only %d of %d Control Blocks"
" created\n",
sc->sc_dev.dv_xname, i, ADW_MAX_CCB);
}
/*
* Create and initialize the Carriers.
*/
error = adw_alloc_carriers(sc);
if (error)
return; /* (error) */ ;
bzero(sc->sc_control->carriers, ADW_CARRIER_SIZE * ADW_MAX_CARRIER);
i = adw_create_carriers(sc);
if (i == 0) {
printf("%s: unable to create Carriers\n",
sc->sc_dev.dv_xname);
return; /* (ENOMEM) */ ;
} else if (i != ADW_MAX_CARRIER) {
printf("%s: WARNING: only %d of %d Carriers created\n",
sc->sc_dev.dv_xname, i, ADW_MAX_CARRIER);
}
/*
* Initialize the ASC3550.
*/
error = (sc->chip_type == ADV_CHIP_ASC3550)?
AdvInitAsc3550Driver(sc) :
AdvInitAsc38C0800Driver(sc);
switch (error) {
case ASC_IERR_MCODE_CHKSUM:
panic("%s: Microcode checksum error",
sc->sc_dev.dv_xname);
break;
case ASC_IERR_ILLEGAL_CONNECTION:
panic("%s: All three connectors are in use",
sc->sc_dev.dv_xname);
break;
case ASC_IERR_REVERSED_CABLE:
panic("%s: Cable is reversed",
sc->sc_dev.dv_xname);
break;
case ASC_IERR_SINGLE_END_DEVICE:
panic("%s: single-ended device is attached to"
" one of the connectors",
sc->sc_dev.dv_xname);
break;
case ASC_IERR_NO_CARRIER:
panic("%s: no carrier",
sc->sc_dev.dv_xname);
break;
case ASC_WARN_BUSRESET_ERROR:
printf("%s: WARNING: Bus Reset Error\n",
sc->sc_dev.dv_xname);
break;
}
/*
* Fill in the adapter.
*/
sc->sc_adapter.scsipi_cmd = adw_scsi_cmd;
sc->sc_adapter.scsipi_minphys = adwminphys;
/*
* fill in the prototype scsipi_link.
*/
sc->sc_link.scsipi_scsi.channel = SCSI_CHANNEL_ONLY_ONE;
sc->sc_link.adapter_softc = sc;
sc->sc_link.scsipi_scsi.adapter_target = sc->chip_scsi_id;
sc->sc_link.adapter = &sc->sc_adapter;
sc->sc_link.device = &adw_dev;
sc->sc_link.openings = 4;
sc->sc_link.scsipi_scsi.max_target = ADW_MAX_TID;
sc->sc_link.scsipi_scsi.max_lun = 7;
sc->sc_link.type = BUS_SCSI;
config_found(&sc->sc_dev, &sc->sc_link, scsiprint);
}
static void
adwminphys(bp)
struct buf *bp;
{
if (bp->b_bcount > ((ADW_MAX_SG_LIST - 1) * PAGE_SIZE))
bp->b_bcount = ((ADW_MAX_SG_LIST - 1) * PAGE_SIZE);
minphys(bp);
}
/*
* start a scsi operation given the command and the data address.
* Also needs the unit, target and lu.
*/
static int
adw_scsi_cmd(xs)
struct scsipi_xfer *xs;
{
struct scsipi_link *sc_link = xs->sc_link;
ADW_SOFTC *sc = sc_link->adapter_softc;
ADW_CCB *ccb;
int s, fromqueue = 1, dontqueue = 0, nowait = 0, retry = 0;
int flags;
s = splbio(); /* protect the queue */
/*
* If we're running the queue from adw_done(), we've been
* called with the first queue entry as our argument.
*/
if (xs == TAILQ_FIRST(&sc->sc_queue)) {
TAILQ_REMOVE(&sc->sc_queue, xs, adapter_q);
fromqueue = 1;
nowait = 1;
} else {
/* Polled requests can't be queued for later. */
dontqueue = xs->xs_control & XS_CTL_POLL;
/*
* If there are jobs in the queue, run them first.
*/
if (TAILQ_FIRST(&sc->sc_queue) != NULL) {
/*
* If we can't queue, we have to abort, since
* we have to preserve order.
*/
if (dontqueue) {
splx(s);
xs->error = XS_DRIVER_STUFFUP;
return (TRY_AGAIN_LATER);
}
/*
* Swap with the first queue entry.
*/
TAILQ_INSERT_TAIL(&sc->sc_queue, xs, adapter_q);
xs = TAILQ_FIRST(&sc->sc_queue);
TAILQ_REMOVE(&sc->sc_queue, xs, adapter_q);
fromqueue = 1;
}
}
/*
* get a ccb to use. If the transfer
* is from a buf (possibly from interrupt time)
* then we can't allow it to sleep
*/
flags = xs->xs_control;
if (nowait)
flags |= XS_CTL_NOSLEEP;
if ((ccb = adw_get_ccb(sc, flags)) == NULL) {
/*
* If we can't queue, we lose.
*/
if (dontqueue) {
splx(s);
xs->error = XS_DRIVER_STUFFUP;
return (TRY_AGAIN_LATER);
}
/*
* Stuff ourselves into the queue, in front
* if we came off in the first place.
*/
if (fromqueue)
TAILQ_INSERT_HEAD(&sc->sc_queue, xs, adapter_q);
else
TAILQ_INSERT_TAIL(&sc->sc_queue, xs, adapter_q);
splx(s);
return (SUCCESSFULLY_QUEUED);
}
splx(s); /* done playing with the queue */
ccb->xs = xs;
ccb->timeout = xs->timeout;
if (adw_build_req(xs, ccb, flags)) {
retryagain:
s = splbio();
retry = adw_queue_ccb(sc, ccb, retry);
splx(s);
switch(retry) {
case ADW_BUSY:
goto retryagain;
case ADW_ERROR:
xs->error = XS_DRIVER_STUFFUP;
return (COMPLETE);
}
/*
* Usually return SUCCESSFULLY QUEUED
*/
if ((xs->xs_control & XS_CTL_POLL) == 0)
return (SUCCESSFULLY_QUEUED);
/*
* If we can't use interrupts, poll on completion
*/
if (adw_poll(sc, xs, ccb->timeout)) {
adw_timeout(ccb);
if (adw_poll(sc, xs, ccb->timeout))
adw_timeout(ccb);
}
}
return (COMPLETE);
}
/*
* Build a request structure for the Wide Boards.
*/
static int
adw_build_req(xs, ccb, flags)
struct scsipi_xfer *xs;
ADW_CCB *ccb;
int flags;
{
struct scsipi_link *sc_link = xs->sc_link;
ADW_SOFTC *sc = sc_link->adapter_softc;
bus_dma_tag_t dmat = sc->sc_dmat;
ADW_SCSI_REQ_Q *scsiqp;
int error;
scsiqp = &ccb->scsiq;
bzero(scsiqp, sizeof(ADW_SCSI_REQ_Q));
/*
* Set the ADW_SCSI_REQ_Q 'ccb_ptr' to point to the
* physical CCB structure.
*/
scsiqp->ccb_ptr = ccb->hashkey;
/*
* Build the ADW_SCSI_REQ_Q request.
*/
/*
* Set CDB length and copy it to the request structure.
*/
bcopy(xs->cmd, &scsiqp->cdb, scsiqp->cdb_len = xs->cmdlen);
scsiqp->target_id = sc_link->scsipi_scsi.target;
scsiqp->target_lun = sc_link->scsipi_scsi.lun;
scsiqp->vsense_addr = &ccb->scsi_sense;
scsiqp->sense_addr = sc->sc_dmamap_control->dm_segs[0].ds_addr +
ADW_CCB_OFF(ccb) + offsetof(struct adw_ccb, scsi_sense);
/* scsiqp->sense_addr = ccb->hashkey +
offsetof(struct adw_ccb, scsi_sense);
*/ scsiqp->sense_len = sizeof(struct scsipi_sense_data);
/*
* Build ADW_SCSI_REQ_Q for a scatter-gather buffer command.
*/
if (xs->datalen) {
/*
* Map the DMA transfer.
*/
#ifdef TFS
if (xs->xs_control & SCSI_DATA_UIO) {
error = bus_dmamap_load_uio(dmat,
ccb->dmamap_xfer, (struct uio *) xs->data,
(flags & XS_CTL_NOSLEEP) ?
BUS_DMA_NOWAIT : BUS_DMA_WAITOK);
} else
#endif /* TFS */
{
error = bus_dmamap_load(dmat,
ccb->dmamap_xfer, xs->data, xs->datalen, NULL,
(flags & XS_CTL_NOSLEEP) ?
BUS_DMA_NOWAIT : BUS_DMA_WAITOK);
}
if (error) {
if (error == EFBIG) {
printf("%s: adw_scsi_cmd, more than %d dma"
" segments\n",
sc->sc_dev.dv_xname, ADW_MAX_SG_LIST);
} else {
printf("%s: adw_scsi_cmd, error %d loading"
" dma map\n",
sc->sc_dev.dv_xname, error);
}
xs->error = XS_DRIVER_STUFFUP;
adw_free_ccb(sc, ccb);
return (0);
}
bus_dmamap_sync(dmat, ccb->dmamap_xfer, 0,
ccb->dmamap_xfer->dm_mapsize,
(xs->xs_control & XS_CTL_DATA_IN) ?
BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE);
/*
* Build scatter-gather list.
*/
scsiqp->data_cnt = xs->datalen;
scsiqp->vdata_addr = xs->data;
scsiqp->data_addr = ccb->dmamap_xfer->dm_segs[0].ds_addr;
bzero(ccb->sg_block, sizeof(ADW_SG_BLOCK) * ADW_NUM_SG_BLOCK);
adw_build_sglist(ccb, scsiqp, ccb->sg_block);
} else {
/*
* No data xfer, use non S/G values.
*/
scsiqp->data_cnt = 0;
scsiqp->vdata_addr = 0;
scsiqp->data_addr = 0;
}
return (1);
}
/*
* Build scatter-gather list for Wide Boards.
*/
static void
adw_build_sglist(ccb, scsiqp, sg_block)
ADW_CCB *ccb;
ADW_SCSI_REQ_Q *scsiqp;
ADW_SG_BLOCK *sg_block;
{
u_long sg_block_next_addr; /* block and its next */
u_int32_t sg_block_physical_addr;
int i; /* how many SG entries */
bus_dma_segment_t *sg_list = &ccb->dmamap_xfer->dm_segs[0];
int sg_elem_cnt = ccb->dmamap_xfer->dm_nsegs;
sg_block_next_addr = (u_long) sg_block; /* allow math operation */
sg_block_physical_addr = ccb->hashkey +
offsetof(struct adw_ccb, sg_block[0]);
scsiqp->sg_real_addr = sg_block_physical_addr;
/*
* If there are more than NO_OF_SG_PER_BLOCK dma segments (hw sg-list)
* then split the request into multiple sg-list blocks.
*/
do {
for (i = 0; i < NO_OF_SG_PER_BLOCK; i++) {
sg_block->sg_list[i].sg_addr = sg_list->ds_addr;
sg_block->sg_list[i].sg_count = sg_list->ds_len;
if (--sg_elem_cnt == 0) {
/* last entry, get out */
sg_block->sg_cnt = i + i;
sg_block->sg_ptr = NULL; /* next link = NULL */
return;
}
sg_list++;
}
sg_block_next_addr += sizeof(ADW_SG_BLOCK);
sg_block_physical_addr += sizeof(ADW_SG_BLOCK);
sg_block->sg_cnt = NO_OF_SG_PER_BLOCK;
sg_block->sg_ptr = sg_block_physical_addr;
sg_block = (ADW_SG_BLOCK *) sg_block_next_addr; /* virt. addr */
} while (1);
}
int
adw_intr(arg)
void *arg;
{
ADW_SOFTC *sc = arg;
struct scsipi_xfer *xs;
if(AdvISR(sc) != ADW_FALSE) {
/*
* If there are queue entries in the software queue, try to
* run the first one. We should be more or less guaranteed
* to succeed, since we just freed a CCB.
*
* NOTE: adw_scsi_cmd() relies on our calling it with
* the first entry in the queue.
*/
if ((xs = TAILQ_FIRST(&sc->sc_queue)) != NULL)
(void) adw_scsi_cmd(xs);
}
return (1);
}
/*
* Poll a particular unit, looking for a particular xs
*/
static int
adw_poll(sc, xs, count)
ADW_SOFTC *sc;
struct scsipi_xfer *xs;
int count;
{
/* timeouts are in msec, so we loop in 1000 usec cycles */
while (count) {
adw_intr(sc);
if (xs->xs_status & XS_STS_DONE)
return (0);
delay(1000); /* only happens in boot so ok */
count--;
}
return (1);
}
static void
adw_timeout(arg)
void *arg;
{
ADW_CCB *ccb = arg;
struct scsipi_xfer *xs = ccb->xs;
struct scsipi_link *sc_link = xs->sc_link;
ADW_SOFTC *sc = sc_link->adapter_softc;
int s;
scsi_print_addr(sc_link);
printf("timed out");
s = splbio();
/*
* If it has been through before, then a previous abort has failed,
* don't try abort again, reset the bus instead.
*/
if (ccb->flags & CCB_ABORTED) {
/*
* Abort Timed Out
* Lets try resetting the bus!
*/
printf(" AGAIN. Resetting SCSI Bus\n");
ccb->flags &= ~CCB_ABORTED;
/* AdvResetSCSIBus() will call sbreset_callback() */
AdvResetSCSIBus(sc);
} else {
/*
* Abort the operation that has timed out
*/
printf("\n");
xs->error = XS_TIMEOUT;
ccb->flags |= CCB_ABORTING;
/* ADW_ABORT_CCB() will implicitly call isr_callback() */
ADW_ABORT_CCB(sc, ccb);
}
splx(s);
}
/******************************************************************************/
/* WIDE boards Interrupt callbacks */
/******************************************************************************/
/*
* adw__isr_callback() - Second Level Interrupt Handler called by AdvISR()
*
* Interrupt callback function for the Wide SCSI Adv Library.
*/
static void
adw_isr_callback(sc, scsiq)
ADW_SOFTC *sc;
ADW_SCSI_REQ_Q *scsiq;
{
bus_dma_tag_t dmat = sc->sc_dmat;
ADW_CCB *ccb;
struct scsipi_xfer *xs;
struct scsipi_sense_data *s1, *s2;
// int s;
ccb = adw_ccb_phys_kv(sc, scsiq->ccb_ptr);
callout_stop(&ccb->xs->xs_callout);
/* if(ccb->flags & CCB_ABORTING) {
printf("Retrying request\n");
ccb->flags &= ~CCB_ABORTING;
ccb->flags |= CCB_ABORTED;
s = splbio();
adw_queue_ccb(sc, ccb);
splx(s);
return;
}
*/
xs = ccb->xs;
/*
* If we were a data transfer, unload the map that described
* the data buffer.
*/
if (xs->datalen) {
bus_dmamap_sync(dmat, ccb->dmamap_xfer, 0,
ccb->dmamap_xfer->dm_mapsize,
(xs->xs_control & XS_CTL_DATA_IN) ?
BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(dmat, ccb->dmamap_xfer);
}
if ((ccb->flags & CCB_ALLOC) == 0) {
printf("%s: exiting ccb not allocated!\n", sc->sc_dev.dv_xname);
Debugger();
return;
}
/*
* Check for an underrun condition.
*/
/*
* if (xs->request_bufflen != 0 && scsiqp->data_cnt != 0) {
* ASC_DBG1(1, "adw_isr_callback: underrun condition %lu bytes\n",
* scsiqp->data_cnt); underrun = ASC_TRUE; }
*/
/*
* 'done_status' contains the command's ending status.
*/
switch (scsiq->done_status) {
case QD_NO_ERROR:
switch (scsiq->host_status) {
case QHSTA_NO_ERROR:
xs->error = XS_NOERROR;
xs->resid = 0;
break;
default:
/* QHSTA error occurred. */
xs->error = XS_DRIVER_STUFFUP;
break;
}
break;
case QD_WITH_ERROR:
switch (scsiq->host_status) {
case QHSTA_NO_ERROR:
switch(scsiq->scsi_status) {
case SS_CHK_CONDITION:
case SS_CMD_TERMINATED:
s1 = &ccb->scsi_sense;
s2 = &xs->sense.scsi_sense;
*s2 = *s1;
xs->error = XS_SENSE;
break;
case SS_TARGET_BUSY:
case SS_RSERV_CONFLICT:
case SS_QUEUE_FULL:
xs->error = XS_DRIVER_STUFFUP;
break;
case SS_CONDITION_MET:
case SS_INTERMID:
case SS_INTERMID_COND_MET:
xs->error = XS_DRIVER_STUFFUP;
break;
case SS_GOOD:
break;
}
break;
case QHSTA_M_SEL_TIMEOUT:
xs->error = XS_DRIVER_STUFFUP;
break;
default:
/* Some other QHSTA error occurred. */
xs->error = XS_DRIVER_STUFFUP;
break;
}
break;
case QD_ABORTED_BY_HOST:
xs->error = XS_DRIVER_STUFFUP;
break;
default:
xs->error = XS_DRIVER_STUFFUP;
break;
}
adw_free_ccb(sc, ccb);
xs->xs_status |= XS_STS_DONE;
scsipi_done(xs);
}
/*
* adv_async_callback() - Adv Library asynchronous event callback function.
*/
static void
adw_async_callback(sc, code)
ADW_SOFTC *sc;
u_int8_t code;
{
switch (code) {
case ADV_ASYNC_SCSI_BUS_RESET_DET:
/*
* The firmware detected a SCSI Bus reset.
*/
break;
case ADV_ASYNC_RDMA_FAILURE:
/*
* Handle RDMA failure by resetting the SCSI Bus and
* possibly the chip if it is unresponsive. Log the error
* with a unique code.
*/
AdvResetSCSIBus(sc);
break;
case ADV_HOST_SCSI_BUS_RESET:
/*
* Host generated SCSI bus reset occurred.
*/
break;
default:
break;
}
}
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