File: [local] / sys / dev / ic / adw.c (download)
Revision 1.1, Tue Mar 4 16:10:02 2008 UTC (16 years, 2 months ago) by nbrk
Branch point for: MAIN
Initial revision
|
/* $OpenBSD: adw.c,v 1.31 2006/11/28 23:59:45 dlg Exp $ */
/* $NetBSD: adw.c,v 1.23 2000/05/27 18:24:50 dante 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/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 <sys/timeout.h>
#include <machine/bus.h>
#include <machine/intr.h>
#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>
#include <dev/ic/adwlib.h>
#include <dev/microcode/adw/adwmcode.h>
#include <dev/ic/adw.h>
#ifndef DDB
#define Debugger() panic("should call debugger here (adw.c)")
#endif /* ! DDB */
/******************************************************************************/
void adw_enqueue(ADW_SOFTC *, struct scsi_xfer *, int);
struct scsi_xfer *adw_dequeue(ADW_SOFTC *);
int adw_alloc_controls(ADW_SOFTC *);
int adw_alloc_carriers(ADW_SOFTC *);
int adw_create_ccbs(ADW_SOFTC *, ADW_CCB *, int);
void adw_free_ccb(ADW_SOFTC *, ADW_CCB *);
void adw_reset_ccb(ADW_CCB *);
int adw_init_ccb(ADW_SOFTC *, ADW_CCB *);
ADW_CCB *adw_get_ccb(ADW_SOFTC *, int);
int adw_queue_ccb(ADW_SOFTC *, ADW_CCB *, int);
int adw_scsi_cmd(struct scsi_xfer *);
int adw_build_req(struct scsi_xfer *, ADW_CCB *, int);
void adw_build_sglist(ADW_CCB *, ADW_SCSI_REQ_Q *, ADW_SG_BLOCK *);
void adw_minphys(struct buf *);
void adw_isr_callback(ADW_SOFTC *, ADW_SCSI_REQ_Q *);
void adw_async_callback(ADW_SOFTC *, u_int8_t);
void adw_print_info(ADW_SOFTC *, int);
int adw_poll(ADW_SOFTC *, struct scsi_xfer *, int);
void adw_timeout(void *);
void adw_reset_bus(ADW_SOFTC *);
/******************************************************************************/
struct cfdriver adw_cd = {
NULL, "adw", DV_DULL
};
/* the below structure is so we have a default dev struct for our link struct */
struct scsi_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 */
};
/******************************************************************************/
/* scsi_xfer queue routines */
/******************************************************************************/
/*
* Insert a scsi_xfer into the software queue. We overload xs->free_list
* to avoid having to allocate additional resources (since we're used
* only during resource shortages anyhow.
*/
void
adw_enqueue(sc, xs, infront)
ADW_SOFTC *sc;
struct scsi_xfer *xs;
int infront;
{
if (infront || LIST_EMPTY(&sc->sc_queue)) {
if (LIST_EMPTY(&sc->sc_queue))
sc->sc_queuelast = xs;
LIST_INSERT_HEAD(&sc->sc_queue, xs, free_list);
return;
}
LIST_INSERT_AFTER(sc->sc_queuelast, xs, free_list);
sc->sc_queuelast = xs;
}
/*
* Pull a scsi_xfer off the front of the software queue.
*/
struct scsi_xfer *
adw_dequeue(sc)
ADW_SOFTC *sc;
{
struct scsi_xfer *xs;
xs = LIST_FIRST(&sc->sc_queue);
LIST_REMOVE(xs, free_list);
if (LIST_EMPTY(&sc->sc_queue))
sc->sc_queuelast = NULL;
return (xs);
}
/******************************************************************************/
/* DMA Mapping for Control Blocks */
/******************************************************************************/
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);
}
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(sizeof(ADW_CARRIER) * ADW_MAX_CARRIER, M_DEVBUF,
M_NOWAIT);
if (sc->sc_control->carriers == NULL)
return (ENOMEM);
if ((error = bus_dmamem_alloc(sc->sc_dmat,
sizeof(ADW_CARRIER) * ADW_MAX_CARRIER,
0x10, 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,
sizeof(ADW_CARRIER) * 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,
sizeof(ADW_CARRIER) * ADW_MAX_CARRIER, 1,
sizeof(ADW_CARRIER) * 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,
sizeof(ADW_CARRIER) * 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);
}
return (0);
}
/******************************************************************************/
/* Control Blocks routines */
/******************************************************************************/
/*
* 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.
*/
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.
*/
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 (TAILQ_NEXT(ccb, chain) == NULL)
wakeup(&sc->sc_free_ccb);
splx(s);
}
void
adw_reset_ccb(ccb)
ADW_CCB *ccb;
{
ccb->flags = 0;
}
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
*/
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 = TAILQ_FIRST(&sc->sc_free_ccb);
if (ccb) {
TAILQ_REMOVE(&sc->sc_free_ccb, ccb, chain);
break;
}
if ((flags & SCSI_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.
*/
int
adw_queue_ccb(sc, ccb, retry)
ADW_SOFTC *sc;
ADW_CCB *ccb;
int retry;
{
int errcode = ADW_SUCCESS;
if(!retry) {
TAILQ_INSERT_TAIL(&sc->sc_waiting_ccb, ccb, chain);
}
while ((ccb = TAILQ_FIRST(&sc->sc_waiting_ccb)) != NULL) {
errcode = AdwExeScsiQueue(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);
TAILQ_INSERT_TAIL(&sc->sc_pending_ccb, ccb, chain);
/* ALWAYS initialize stimeout, lest it contain garbage! */
timeout_set(&ccb->xs->stimeout, adw_timeout, ccb);
if ((ccb->xs->flags & SCSI_POLL) == 0)
timeout_add(&ccb->xs->stimeout, (ccb->timeout * hz) / 1000);
}
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 {
AdwResetChip(sc->sc_iot, sc->sc_ioh);
warn_code = AdwInitFromEEPROM(sc);
if (warn_code & ADW_WARN_EEPROM_CHKSUM)
printf("%s: Bad checksum found. "
"Setting default values\n",
sc->sc_dev.dv_xname);
if (warn_code & ADW_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;
{
struct scsibus_attach_args saa;
int i, error;
TAILQ_INIT(&sc->sc_free_ccb);
TAILQ_INIT(&sc->sc_waiting_ccb);
TAILQ_INIT(&sc->sc_pending_ccb);
LIST_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) */ ;
/*
* Zero's the freeze_device status
*/
bzero(sc->sc_freeze_dev, sizeof(sc->sc_freeze_dev));
/*
* Initialize the adapter
*/
switch (AdwInitDriver(sc)) {
case ADW_IERR_BIST_PRE_TEST:
panic("%s: BIST pre-test error",
sc->sc_dev.dv_xname);
break;
case ADW_IERR_BIST_RAM_TEST:
panic("%s: BIST RAM test error",
sc->sc_dev.dv_xname);
break;
case ADW_IERR_MCODE_CHKSUM:
panic("%s: Microcode checksum error",
sc->sc_dev.dv_xname);
break;
case ADW_IERR_ILLEGAL_CONNECTION:
panic("%s: All three connectors are in use",
sc->sc_dev.dv_xname);
break;
case ADW_IERR_REVERSED_CABLE:
panic("%s: Cable is reversed",
sc->sc_dev.dv_xname);
break;
case ADW_IERR_HVD_DEVICE:
panic("%s: HVD attached to LVD connector",
sc->sc_dev.dv_xname);
break;
case ADW_IERR_SINGLE_END_DEVICE:
panic("%s: single-ended device is attached to"
" one of the connectors",
sc->sc_dev.dv_xname);
break;
case ADW_IERR_NO_CARRIER:
panic("%s: unable to create Carriers",
sc->sc_dev.dv_xname);
break;
case ADW_WARN_BUSRESET_ERROR:
printf("%s: WARNING: Bus Reset Error\n",
sc->sc_dev.dv_xname);
break;
}
/*
* Fill in the adapter.
*/
sc->sc_adapter.scsi_cmd = adw_scsi_cmd;
sc->sc_adapter.scsi_minphys = adw_minphys;
/*
* fill in the prototype scsi_link.
*/
sc->sc_link.adapter_softc = sc;
sc->sc_link.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.adapter_buswidth = ADW_MAX_TID+1;
bzero(&saa, sizeof(saa));
saa.saa_sc_link = &sc->sc_link;
config_found(&sc->sc_dev, &saa, scsiprint);
}
void
adw_minphys(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.
*/
int
adw_scsi_cmd(xs)
struct scsi_xfer *xs;
{
struct scsi_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 == LIST_FIRST(&sc->sc_queue)) {
if(sc->sc_freeze_dev[xs->sc_link->target]) {
splx(s);
return (TRY_AGAIN_LATER);
}
xs = adw_dequeue(sc);
fromqueue = 1;
nowait = 1;
} else {
if(sc->sc_freeze_dev[xs->sc_link->target]) {
splx(s);
return (TRY_AGAIN_LATER);
}
/* Polled requests can't be queued for later. */
dontqueue = xs->flags & SCSI_POLL;
/*
* If there are jobs in the queue, run them first.
*/
if (!LIST_EMPTY(&sc->sc_queue)) {
/*
* If we can't queue, we have to abort, since
* we have to preserve order.
*/
if (dontqueue) {
splx(s);
return (TRY_AGAIN_LATER);
}
/*
* Swap with the first queue entry.
*/
adw_enqueue(sc, xs, 0);
xs = adw_dequeue(sc);
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->flags;
if (nowait)
flags |= SCSI_NOSLEEP;
if ((ccb = adw_get_ccb(sc, flags)) == NULL) {
/*
* If we can't queue, we lose.
*/
if (dontqueue) {
splx(s);
return (TRY_AGAIN_LATER);
}
/*
* Stuff ourselves into the queue, in front
* if we came off in the first place.
*/
adw_enqueue(sc, xs, fromqueue);
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->flags & SCSI_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.
*/
int
adw_build_req(xs, ccb, flags)
struct scsi_xfer *xs;
ADW_CCB *ccb;
int flags;
{
struct scsi_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.
* For wide boards a CDB length maximum of 16 bytes
* is supported.
*/
bcopy(xs->cmd, &scsiqp->cdb, ((scsiqp->cdb_len = xs->cmdlen) <= 12)?
xs->cmdlen : 12 );
if(xs->cmdlen > 12)
bcopy(&(xs->cmd[12]), &scsiqp->cdb16, xs->cmdlen - 12);
scsiqp->target_id = sc_link->target;
scsiqp->target_lun = sc_link->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_len = sizeof(struct scsi_sense_data);
/*
* Build ADW_SCSI_REQ_Q for a scatter-gather buffer command.
*/
if (xs->datalen) {
/*
* Map the DMA transfer.
*/
#ifdef TFS
if (xs->flags & SCSI_DATA_UIO) {
error = bus_dmamap_load_uio(dmat,
ccb->dmamap_xfer, (struct uio *) xs->data,
(flags & SCSI_NOSLEEP) ?
BUS_DMA_NOWAIT : BUS_DMA_WAITOK);
} else
#endif /* TFS */
{
error = bus_dmamap_load(dmat,
ccb->dmamap_xfer, xs->data, xs->datalen, NULL,
(flags & SCSI_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->flags & SCSI_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.
*/
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 + 1;
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);
}
/******************************************************************************/
/* Interrupts and TimeOut routines */
/******************************************************************************/
int
adw_intr(arg)
void *arg;
{
ADW_SOFTC *sc = arg;
struct scsi_xfer *xs;
if(AdwISR(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 = LIST_FIRST(&sc->sc_queue)) != NULL)
(void) adw_scsi_cmd(xs);
return (1);
}
return (0);
}
/*
* Poll a particular unit, looking for a particular xs
*/
int
adw_poll(sc, xs, count)
ADW_SOFTC *sc;
struct scsi_xfer *xs;
int count;
{
/* timeouts are in msec, so we loop in 1000 usec cycles */
while (count > 0) {
adw_intr(sc);
if (xs->flags & ITSDONE) {
if ((xs->cmd->opcode == INQUIRY)
&& (xs->sc_link->lun == 0)
&& (xs->error == XS_NOERROR))
adw_print_info(sc, xs->sc_link->target);
return (0);
}
delay(1000); /* only happens in boot so ok */
count--;
}
return (1);
}
void
adw_timeout(arg)
void *arg;
{
ADW_CCB *ccb = arg;
struct scsi_xfer *xs = ccb->xs;
struct scsi_link *sc_link = xs->sc_link;
ADW_SOFTC *sc = sc_link->adapter_softc;
int s;
sc_print_addr(sc_link);
printf("timed out");
s = splbio();
if (ccb->flags & CCB_ABORTED) {
/*
* Abort Timed Out
*
* No more opportunities. Lets try resetting the bus and
* reinitialize the host adapter.
*/
timeout_del(&xs->stimeout);
printf(" AGAIN. Resetting SCSI Bus\n");
adw_reset_bus(sc);
splx(s);
return;
} else if (ccb->flags & CCB_ABORTING) {
/*
* Abort the operation that has timed out.
*
* Second opportunity.
*/
printf("\n");
xs->error = XS_TIMEOUT;
ccb->flags |= CCB_ABORTED;
#if 0
/*
* - XXX - 3.3a microcode is BROKEN!!!
*
* We cannot abort a CCB, so we can only hope the command
* get completed before the next timeout, otherwise a
* Bus Reset will arrive inexorably.
*/
/*
* ADW_ABORT_CCB() makes the board to generate an interrupt
*
* - XXX - The above assertion MUST be verified (and this
* code changed as well [callout_*()]), when the
* ADW_ABORT_CCB will be working again
*/
ADW_ABORT_CCB(sc, ccb);
#endif
/*
* waiting for multishot callout_reset() let's restart it
* by hand so the next time a timeout event will occur
* we will reset the bus.
*/
timeout_add(&xs->stimeout, (ccb->timeout * hz) / 1000);
} else {
/*
* Abort the operation that has timed out.
*
* First opportunity.
*/
printf("\n");
xs->error = XS_TIMEOUT;
ccb->flags |= CCB_ABORTING;
#if 0
/*
* - XXX - 3.3a microcode is BROKEN!!!
*
* We cannot abort a CCB, so we can only hope the command
* get completed before the next 2 timeout, otherwise a
* Bus Reset will arrive inexorably.
*/
/*
* ADW_ABORT_CCB() makes the board to generate an interrupt
*
* - XXX - The above assertion MUST be verified (and this
* code changed as well [callout_*()]), when the
* ADW_ABORT_CCB will be working again
*/
ADW_ABORT_CCB(sc, ccb);
#endif
/*
* waiting for multishot callout_reset() let's restart it
* by hand so to give a second opportunity to the command
* which timed-out.
*/
timeout_add(&xs->stimeout, (ccb->timeout * hz) / 1000);
}
splx(s);
}
void
adw_reset_bus(sc)
ADW_SOFTC *sc;
{
ADW_CCB *ccb;
int s;
s = splbio();
AdwResetSCSIBus(sc); /* XXX - should check return value? */
while((ccb = TAILQ_LAST(&sc->sc_pending_ccb,
adw_pending_ccb)) != NULL) {
timeout_del(&ccb->xs->stimeout);
TAILQ_REMOVE(&sc->sc_pending_ccb, ccb, chain);
TAILQ_INSERT_HEAD(&sc->sc_waiting_ccb, ccb, chain);
}
bzero(sc->sc_freeze_dev, sizeof(sc->sc_freeze_dev));
adw_queue_ccb(sc, TAILQ_FIRST(&sc->sc_waiting_ccb), 1);
splx(s);
}
/******************************************************************************/
/* Host Adapter and Peripherals Information Routines */
/******************************************************************************/
void
adw_print_info(sc, tid)
ADW_SOFTC *sc;
int tid;
{
bus_space_handle_t ioh = sc->sc_ioh;
bus_space_tag_t iot = sc->sc_iot;
u_int16_t hshk_cfg, able_mask, period = 0;
/* hshk/HSHK means 'handskake' */
ADW_READ_WORD_LRAM(iot, ioh,
ADW_MC_DEVICE_HSHK_CFG_TABLE + (2 * tid), hshk_cfg);
ADW_READ_WORD_LRAM(iot, ioh, ADW_MC_WDTR_ABLE, able_mask);
if ((able_mask & ADW_TID_TO_TIDMASK(tid)) == 0)
hshk_cfg &= ~HSHK_CFG_WIDE_XFR;
ADW_READ_WORD_LRAM(iot, ioh, ADW_MC_SDTR_ABLE, able_mask);
if ((able_mask & ADW_TID_TO_TIDMASK(tid)) == 0)
hshk_cfg &= ~HSHK_CFG_OFFSET;
printf("%s: target %d using %d bit ", sc->sc_dev.dv_xname, tid,
(hshk_cfg & HSHK_CFG_WIDE_XFR) ? 16 : 8);
if ((hshk_cfg & HSHK_CFG_OFFSET) == 0)
printf("async ");
else {
period = (hshk_cfg & 0x1f00) >> 8;
switch (period) {
case 0x11:
printf("80.0 ");
break;
case 0x10:
printf("40.0 ");
break;
default:
period = (period * 25) + 50;
printf("%d.%d ", 1000/period, ADW_TENTHS(1000, period));
break;
}
printf("MHz %d REQ/ACK offset ", hshk_cfg & HSHK_CFG_OFFSET);
}
printf("xfers\n");
}
/******************************************************************************/
/* WIDE boards Interrupt callbacks */
/******************************************************************************/
/*
* adw_isr_callback() - Second Level Interrupt Handler called by AdwISR()
*
* Interrupt callback function for the Wide SCSI Adw Library.
*
* Notice:
* Interrupts are disabled by the caller (AdwISR() function), and will be
* enabled at the end of the caller.
*/
void
adw_isr_callback(sc, scsiq)
ADW_SOFTC *sc;
ADW_SCSI_REQ_Q *scsiq;
{
bus_dma_tag_t dmat;
ADW_CCB *ccb;
struct scsi_xfer *xs;
struct scsi_sense_data *s1, *s2;
ccb = adw_ccb_phys_kv(sc, scsiq->ccb_ptr);
TAILQ_REMOVE(&sc->sc_pending_ccb, ccb, chain);
if ((ccb->flags & CCB_ALLOC) == 0) {
printf("%s: unallocated ccb found on pending list!\n",
sc->sc_dev.dv_xname);
Debugger();
adw_free_ccb(sc, ccb);
return;
}
xs = ccb->xs;
timeout_del(&xs->stimeout);
/*
* If we were a data transfer, unload the map that described
* the data buffer.
*/
dmat = sc->sc_dmat;
if (xs->datalen) {
bus_dmamap_sync(dmat, ccb->dmamap_xfer,
0, ccb->dmamap_xfer->dm_mapsize,
((xs->flags & SCSI_DATA_IN) ?
BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE));
bus_dmamap_unload(dmat, ccb->dmamap_xfer);
}
/*
* 'done_status' contains the command's ending status.
* 'host_status' contains the host adapter status.
* 'scsi_status' contains the scsi peripheral status.
*/
sc->sc_freeze_dev[scsiq->target_id] = 0;
xs->status = scsiq->scsi_status;
switch (scsiq->done_status) {
case QD_NO_ERROR: /* (scsi_status == 0) && (host_status == 0) */
NO_ERROR:
xs->resid = scsiq->data_cnt;
xs->error = XS_NOERROR;
break;
case QD_WITH_ERROR:
switch (scsiq->host_status) {
case QHSTA_NO_ERROR:
switch (scsiq->scsi_status) {
case SCSI_COND_MET:
case SCSI_INTERM:
case SCSI_INTERM_COND_MET:
/*
* These non-zero status values are
* not really error conditions.
*
* XXX - would it be too paranoid to
* add SCSI_OK here in
* case the docs are wrong re
* QD_NO_ERROR?
*/
goto NO_ERROR;
case SCSI_CHECK:
case SCSI_TERMINATED:
case SCSI_ACA_ACTIVE:
s1 = &ccb->scsi_sense;
s2 = &xs->sense;
*s2 = *s1;
xs->error = XS_SENSE;
break;
case SCSI_BUSY:
case SCSI_QUEUE_FULL:
case SCSI_RESV_CONFLICT:
sc->sc_freeze_dev[scsiq->target_id] = 1;
xs->error = XS_BUSY;
break;
default: /* scsiq->scsi_status value */
printf("%s: bad scsi_status: 0x%02x.\n"
,sc->sc_dev.dv_xname
,scsiq->scsi_status);
xs->error = XS_DRIVER_STUFFUP;
break;
}
break;
case QHSTA_M_SEL_TIMEOUT:
xs->error = XS_SELTIMEOUT;
break;
case QHSTA_M_DIRECTION_ERR:
case QHSTA_M_SXFR_OFF_UFLW:
case QHSTA_M_SXFR_OFF_OFLW:
case QHSTA_M_SXFR_XFR_OFLW:
case QHSTA_M_QUEUE_ABORTED:
case QHSTA_M_INVALID_DEVICE:
case QHSTA_M_SGBACKUP_ERROR:
case QHSTA_M_SXFR_DESELECTED:
case QHSTA_M_SXFR_XFR_PH_ERR:
case QHSTA_M_BUS_DEVICE_RESET:
case QHSTA_M_NO_AUTO_REQ_SENSE:
case QHSTA_M_BAD_CMPL_STATUS_IN:
case QHSTA_M_SXFR_UNKNOWN_ERROR:
case QHSTA_M_AUTO_REQ_SENSE_FAIL:
case QHSTA_M_UNEXPECTED_BUS_FREE:
printf("%s: host adapter error 0x%02x."
" See adw(4).\n"
,sc->sc_dev.dv_xname, scsiq->host_status);
xs->error = XS_DRIVER_STUFFUP;
break;
case QHSTA_M_RDMA_PERR:
case QHSTA_M_SXFR_WD_TMO:
case QHSTA_M_WTM_TIMEOUT:
case QHSTA_M_FROZEN_TIDQ:
case QHSTA_M_SXFR_SDMA_ERR:
case QHSTA_M_SXFR_SXFR_PERR:
case QHSTA_M_SCSI_BUS_RESET:
case QHSTA_M_DIRECTION_ERR_HUNG:
case QHSTA_M_SCSI_BUS_RESET_UNSOL:
/*
* XXX - are all these cases really asking
* for a card reset? _BUS_RESET and
* _BUS_RESET_UNSOL added just to make
* sure the pending queue is cleared out
* in case card has lost track of them.
*/
printf("%s: host adapter error 0x%02x,"
" resetting bus. See adw(4).\n"
,sc->sc_dev.dv_xname, scsiq->host_status);
adw_reset_bus(sc);
xs->error = XS_RESET;
break;
default: /* scsiq->host_status value */
/*
* XXX - is a panic really appropriate here? If
* not, would it be better to make the
* XS_DRIVER_STUFFUP case above the
* default behaviour? Or XS_RESET?
*/
panic("%s: bad host_status: 0x%02x"
,sc->sc_dev.dv_xname, scsiq->host_status);
break;
}
break;
case QD_ABORTED_BY_HOST:
xs->error = XS_DRIVER_STUFFUP;
break;
default: /* scsiq->done_status value */
/*
* XXX - would QD_NO_STATUS really mean the I/O is not
* done? and would that mean it should somehow be
* put back as a pending I/O?
*/
printf("%s: bad done_status: 0x%02x"
" (host_status: 0x%02x, scsi_status: 0x%02x)\n"
,sc->sc_dev.dv_xname
,scsiq->done_status
,scsiq->host_status
,scsiq->scsi_status);
xs->error = XS_DRIVER_STUFFUP;
break;
}
adw_free_ccb(sc, ccb);
xs->flags |= ITSDONE;
scsi_done(xs);
}
/*
* adw_async_callback() - Adw Library asynchronous event callback function.
*/
void
adw_async_callback(sc, code)
ADW_SOFTC *sc;
u_int8_t code;
{
switch (code) {
case ADW_ASYNC_SCSI_BUS_RESET_DET:
/* The firmware detected a SCSI Bus reset. */
printf("%s: SCSI Bus reset detected\n", sc->sc_dev.dv_xname);
break;
case ADW_ASYNC_RDMA_FAILURE:
/*
* Handle RDMA failure by resetting the SCSI Bus and
* possibly the chip if it is unresponsive.
*/
printf("%s: RDMA failure. Resetting the SCSI Bus and"
" the adapter\n", sc->sc_dev.dv_xname);
adw_reset_bus(sc);
break;
case ADW_HOST_SCSI_BUS_RESET:
/* Host generated SCSI bus reset occurred. */
printf("%s: Host generated SCSI bus reset occurred\n",
sc->sc_dev.dv_xname);
break;
case ADW_ASYNC_CARRIER_READY_FAILURE:
/*
* Carrier Ready failure.
*
* A warning only - RISC too busy to realize it's been
* tickled. Occurs in normal operation under heavy
* load, so a message is printed only when ADW_DEBUG'ing
*/
#ifdef ADW_DEBUG
printf("%s: Carrier Ready failure!\n", sc->sc_dev.dv_xname);
#endif
break;
default:
printf("%s: Unknown Async callback code (ignored): 0x%02x\n",
sc->sc_dev.dv_xname, code);
break;
}
}
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