* Copyright (c) 1995 Charles D. Cranor

/* $NetBSD: xy.c,v 1.102 2021/08/07 16:19:17 thorpej Exp $ */

/*
* Copyright (c) 1995 Charles D. Cranor
* All rights reserved.
*
* 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 AUTHOR ``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 AUTHOR 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.
*/

/*
*
* x y . c x y l o g i c s 4 5 0 / 4 5 1 s m d d r i v e r
*
* author: Chuck Cranor <chuck@netbsd>
* started: 14-Sep-95
* references: [1] Xylogics Model 753 User's Manual
* part number: 166-753-001, Revision B, May 21, 1988.
* "Your Partner For Performance"
* [2] other NetBSD disk device drivers
* [3] Xylogics Model 450 User's Manual
* part number: 166-017-001, Revision B, 1983.
* [4] Addendum to Xylogics Model 450 Disk Controller User's
* Manual, Jan. 1985.
* [5] The 451 Controller, Rev. B3, September 2, 1986.
* [6] David Jones <[email protected]>'s unfinished 450/451 driver
*
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: xy.c,v 1.102 2021/08/07 16:19:17 thorpej Exp $");

#undef XYC_DEBUG /* full debug */
#undef XYC_DIAG /* extra sanity checks */
#if defined(DIAGNOSTIC) && !defined(XYC_DIAG)
#define XYC_DIAG /* link in with master DIAG option */
#endif

#include <sys/param.h>
#include <sys/proc.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/buf.h>
#include <sys/bufq.h>
#include <sys/uio.h>
#include <sys/malloc.h>
#include <sys/device.h>
#include <sys/disklabel.h>
#include <sys/disk.h>
#include <sys/syslog.h>
#include <sys/dkbad.h>
#include <sys/conf.h>
#include <sys/kauth.h>

#include <sys/bus.h>
#include <sys/intr.h>

#if defined(__sparc__) || defined(sun3)
#include <dev/sun/disklabel.h>
#endif

#include <dev/vme/vmereg.h>
#include <dev/vme/vmevar.h>

#include <dev/vme/xyreg.h>
#include <dev/vme/xyvar.h>
#include <dev/vme/xio.h>

#include "locators.h"

/*
* macros
*/

/*
* XYC_GO: start iopb ADDR (DVMA addr in a u_long) on XYC
*/
#define XYC_GO(XYC, ADDR) { \
u_long addr = (u_long)ADDR; \
(XYC)->xyc_addr_lo = ((addr) & 0xff); \
(addr) = ((addr) >> 8); \
(XYC)->xyc_addr_hi = ((addr) & 0xff); \
(addr) = ((addr) >> 8); \
(XYC)->xyc_reloc_lo = ((addr) & 0xff); \
(addr) = ((addr) >> 8); \
(XYC)->xyc_reloc_hi = (addr); \
(XYC)->xyc_csr = XYC_GBSY; /* go! */ \
}

/*
* XYC_DONE: don't need IORQ, get error code and free (done after xyc_cmd)
*/

#define XYC_DONE(SC,ER) { \
if ((ER) == XY_ERR_AOK) { \
(ER) = (SC)->ciorq->errnum; \
(SC)->ciorq->mode = XY_SUB_FREE; \
wakeup((SC)->ciorq); \
} \
}

/*
* XYC_ADVANCE: advance iorq's pointers by a number of sectors
*/

#define XYC_ADVANCE(IORQ, N) { \
if (N) { \
(IORQ)->sectcnt -= (N); \
(IORQ)->blockno += (N); \
(IORQ)->dbuf += ((N)*XYFM_BPS); \
} \
}

/*
* note - addresses you can sleep on:
* [1] & of xy_softc's "state" (waiting for a chance to attach a drive)
* [2] & an iorq (waiting for an XY_SUB_WAIT iorq to finish)
*/

/*
* function prototypes
* "xyc_*" functions are internal, all others are external interfaces
*/

extern int pil_to_vme[]; /* from obio.c */

/* internals */
struct xy_iopb *xyc_chain(struct xyc_softc *, struct xy_iorq *);
int xyc_cmd(struct xyc_softc *, int, int, int, int, int, char *, int);
const char *xyc_e2str(int);
int xyc_entoact(int);
int xyc_error(struct xyc_softc *, struct xy_iorq *,
struct xy_iopb *, int);
int xyc_ioctlcmd(struct xy_softc *, dev_t dev, struct xd_iocmd *);
void xyc_perror(struct xy_iorq *, struct xy_iopb *, int);
int xyc_piodriver(struct xyc_softc *, struct xy_iorq *);
int xyc_remove_iorq(struct xyc_softc *);
int xyc_reset(struct xyc_softc *, int, struct xy_iorq *, int,
struct xy_softc *);
inline void xyc_rqinit(struct xy_iorq *, struct xyc_softc *,
struct xy_softc *, int, u_long, int,
void *, struct buf *);
void xyc_rqtopb(struct xy_iorq *, struct xy_iopb *, int, int);
void xyc_start(struct xyc_softc *, struct xy_iorq *);
int xyc_startbuf(struct xyc_softc *, struct xy_softc *, struct buf *);
int xyc_submit_iorq(struct xyc_softc *, struct xy_iorq *, int);
void xyc_tick(void *);
int xyc_unbusy(struct xyc *, int);
void xyc_xyreset(struct xyc_softc *, struct xy_softc *);
int xy_dmamem_alloc(bus_dma_tag_t, bus_dmamap_t, bus_dma_segment_t *,
int *, bus_size_t, void **, bus_addr_t *);
void xy_dmamem_free(bus_dma_tag_t, bus_dmamap_t, bus_dma_segment_t *,
int, bus_size_t, void *);

/* machine interrupt hook */
int xycintr(void *);

/* autoconf */
int xycmatch(device_t, cfdata_t, void *);
void xycattach(device_t, device_t, void *);
int xymatch(device_t, cfdata_t, void *);
void xyattach(device_t, device_t, void *);
static int xyc_probe(void *, bus_space_tag_t, bus_space_handle_t);

static void xydummystrat(struct buf *);
int xygetdisklabel(struct xy_softc *, void *);

/*
* cfattach's: device driver interface to autoconfig
*/

CFATTACH_DECL_NEW(xyc, sizeof(struct xyc_softc),
xycmatch, xycattach, NULL, NULL);

CFATTACH_DECL_NEW(xy, sizeof(struct xy_softc),
xymatch, xyattach, NULL, NULL);

extern struct cfdriver xy_cd;

dev_type_open(xyopen);
dev_type_close(xyclose);
dev_type_read(xyread);
dev_type_write(xywrite);
dev_type_ioctl(xyioctl);
dev_type_strategy(xystrategy);
dev_type_dump(xydump);
dev_type_size(xysize);

const struct bdevsw xy_bdevsw = {
.d_open = xyopen,
.d_close = xyclose,
.d_strategy = xystrategy,
.d_ioctl = xyioctl,
.d_dump = xydump,
.d_psize = xysize,
.d_discard = nodiscard,
.d_flag = D_DISK
};

const struct cdevsw xy_cdevsw = {
.d_open = xyopen,
.d_close = xyclose,
.d_read = xyread,
.d_write = xywrite,
.d_ioctl = xyioctl,
.d_stop = nostop,
.d_tty = notty,
.d_poll = nopoll,
.d_mmap = nommap,
.d_kqfilter = nokqfilter,
.d_discard = nodiscard,
.d_flag = D_DISK
};

struct xyc_attach_args { /* this is the "aux" args to xyattach */
int driveno; /* unit number */
int fullmode; /* submit mode */
int booting; /* are we booting or not? */
};

/*
* dkdriver
*/

struct dkdriver xydkdriver = {
.d_strategy = xystrategy
};

/*
* start: disk label fix code (XXX)
*/

static void *xy_labeldata;

static void
xydummystrat(struct buf *bp)
{
if (bp->b_bcount != XYFM_BPS)
panic("xydummystrat");
memcpy(bp->b_data, xy_labeldata, XYFM_BPS);
bp->b_oflags |= BO_DONE;
bp->b_cflags &= ~BC_BUSY;
}

int
xygetdisklabel(struct xy_softc *xy, void *b)
{
const char *err;
#if defined(__sparc__) || defined(sun3)
struct sun_disklabel *sdl;
#endif

/* We already have the label data in `b'; setup for dummy strategy */
xy_labeldata = b;

/* Required parameter for readdisklabel() */
xy->sc_dk.dk_label->d_secsize = XYFM_BPS;

err = readdisklabel(MAKEDISKDEV(0, device_unit(xy->sc_dev), RAW_PART),
xydummystrat,
xy->sc_dk.dk_label, xy->sc_dk.dk_cpulabel);
if (err) {
printf("%s: %s\n", device_xname(xy->sc_dev), err);
return(XY_ERR_FAIL);
}

#if defined(__sparc__) || defined(sun3)
/* Ok, we have the label; fill in `pcyl' if there's SunOS magic */
sdl = (struct sun_disklabel *)xy->sc_dk.dk_cpulabel->cd_block;
if (sdl->sl_magic == SUN_DKMAGIC) {
xy->pcyl = sdl->sl_pcylinders;
} else
#endif
{
printf("%s: WARNING: no `pcyl' in disk label.\n",
device_xname(xy->sc_dev));
xy->pcyl = xy->sc_dk.dk_label->d_ncylinders +
xy->sc_dk.dk_label->d_acylinders;
printf("%s: WARNING: guessing pcyl=%d (ncyl+acyl)\n",
device_xname(xy->sc_dev), xy->pcyl);
}

xy->ncyl = xy->sc_dk.dk_label->d_ncylinders;
xy->acyl = xy->sc_dk.dk_label->d_acylinders;
xy->nhead = xy->sc_dk.dk_label->d_ntracks;
xy->nsect = xy->sc_dk.dk_label->d_nsectors;
xy->sectpercyl = xy->nhead * xy->nsect;
xy->sc_dk.dk_label->d_secsize = XYFM_BPS; /* not handled by
* sun->bsd */
return(XY_ERR_AOK);
}

/*
* end: disk label fix code (XXX)
*/

/*
* Shorthand for allocating, mapping and loading a DMA buffer
*/
int
xy_dmamem_alloc(bus_dma_tag_t tag, bus_dmamap_t map, bus_dma_segment_t *seg, int *nsegp, bus_size_t len, void * *kvap, bus_addr_t *dmap)
{
int nseg;
int error;

if ((error = bus_dmamem_alloc(tag, len, 0, 0,
seg, 1, &nseg, BUS_DMA_NOWAIT)) != 0) {
return (error);
}

if ((error = bus_dmamem_map(tag, seg, nseg,
len, kvap,
BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) {
bus_dmamem_free(tag, seg, nseg);
return (error);
}

if ((error = bus_dmamap_load(tag, map, *kvap, len, NULL,
BUS_DMA_NOWAIT)) != 0) {
bus_dmamem_unmap(tag, *kvap, len);
bus_dmamem_free(tag, seg, nseg);
return (error);
}

*dmap = map->dm_segs[0].ds_addr;
*nsegp = nseg;
return (0);
}

void
xy_dmamem_free(bus_dma_tag_t tag, bus_dmamap_t map, bus_dma_segment_t *seg, int nseg, bus_size_t len, void * kva)
{

bus_dmamap_unload(tag, map);
bus_dmamem_unmap(tag, kva, len);
bus_dmamem_free(tag, seg, nseg);
}

/*
* a u t o c o n f i g f u n c t i o n s
*/

/*
* xycmatch: determine if xyc is present or not. we do a
* soft reset to detect the xyc.
*/
int
xyc_probe(void *arg, bus_space_tag_t tag, bus_space_handle_t handle)
{
struct xyc *xyc = (void *)handle; /* XXX */

return ((xyc_unbusy(xyc, XYC_RESETUSEC) != XY_ERR_FAIL) ? 0 : EIO);
}

int
xycmatch(device_t parent, cfdata_t cf, void *aux)
{
struct vme_attach_args *va = aux;
vme_chipset_tag_t ct = va->va_vct;
vme_am_t mod;
int error;

mod = VME_AM_A16 | VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA;
if (vme_space_alloc(ct, va->r[0].offset, sizeof(struct xyc), mod))
return (0);

error = vme_probe(ct, va->r[0].offset, sizeof(struct xyc),
mod, VME_D16, xyc_probe, 0);
vme_space_free(va->va_vct, va->r[0].offset, sizeof(struct xyc), mod);

return (error == 0);
}

/*
* xycattach: attach controller
*/
void
xycattach(device_t parent, device_t self, void *aux)
{
struct xyc_softc *xyc = device_private(self);
struct vme_attach_args *va = aux;
vme_chipset_tag_t ct = va->va_vct;
bus_space_tag_t bt;
bus_space_handle_t bh;
vme_intr_handle_t ih;
vme_am_t mod;
struct xyc_attach_args xa;
int lcv, res, error;
bus_dma_segment_t seg;
int rseg;
vme_mapresc_t resc;
bus_addr_t busaddr;

xyc->sc_dev = self;

/* get addressing and intr level stuff from autoconfig and load it
* into our xyc_softc. */

mod = VME_AM_A16 | VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA;

if (vme_space_alloc(ct, va->r[0].offset, sizeof(struct xyc), mod))
panic("xyc: vme alloc");

if (vme_space_map(ct, va->r[0].offset, sizeof(struct xyc),
mod, VME_D16, 0, &bt, &bh, &resc) != 0)
panic("xyc: vme_map");

xyc->xyc = (struct xyc *) bh; /* XXX */
xyc->ipl = va->ilevel;
xyc->vector = va->ivector;
xyc->no_ols = 0; /* XXX should be from config */

for (lcv = 0; lcv < XYC_MAXDEV; lcv++)
xyc->sc_drives[lcv] = NULL;

/*
* allocate and zero buffers
* check boundaries of the KVA's ... all IOPBs must reside in
* the same 64K region.
*/

/* Get DMA handle for misc. transfers */
if ((error = vme_dmamap_create(
ct, /* VME chip tag */
MAXPHYS, /* size */
VME_AM_A24, /* address modifier */
VME_D16, /* data size */
0, /* swap */
1, /* nsegments */
MAXPHYS, /* maxsegsz */
0, /* boundary */
BUS_DMA_NOWAIT,
&xyc->auxmap)) != 0) {

aprint_error_dev(xyc->sc_dev, "DMA buffer map create error %d\n",
error);
return;
}

/* Get DMA handle for mapping iorq descriptors */
if ((error = vme_dmamap_create(
ct, /* VME chip tag */
XYC_MAXIOPB * sizeof(struct xy_iopb),
VME_AM_A24, /* address modifier */
VME_D16, /* data size */
0, /* swap */
1, /* nsegments */
XYC_MAXIOPB * sizeof(struct xy_iopb),
64*1024, /* boundary */
BUS_DMA_NOWAIT,
&xyc->iopmap)) != 0) {

aprint_error_dev(xyc->sc_dev, "DMA buffer map create error %d\n",
error);
return;
}

/* Get DMA buffer for iorq descriptors */
if ((error = xy_dmamem_alloc(xyc->dmatag, xyc->iopmap, &seg, &rseg,
XYC_MAXIOPB * sizeof(struct xy_iopb),
(void **)&xyc->iopbase,
&busaddr)) != 0) {
aprint_error_dev(xyc->sc_dev, "DMA buffer alloc error %d\n",
error);
return;
}
xyc->dvmaiopb = (struct xy_iopb *)(u_long)BUS_ADDR_PADDR(busaddr);

memset(xyc->iopbase, 0, XYC_MAXIOPB * sizeof(struct xy_iopb));

xyc->reqs = malloc(XYC_MAXIOPB * sizeof(struct xy_iorq),
M_DEVBUF, M_WAITOK|M_ZERO);

/*
* init iorq to iopb pointers, and non-zero fields in the
* iopb which never change.
*/

for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) {
xyc->xy_chain[lcv] = NULL;
xyc->reqs[lcv].iopb = &xyc->iopbase[lcv];
xyc->reqs[lcv].dmaiopb = &xyc->dvmaiopb[lcv];
xyc->iopbase[lcv].asr = 1; /* always the same */
xyc->iopbase[lcv].eef = 1; /* always the same */
xyc->iopbase[lcv].ecm = XY_ECM; /* always the same */
xyc->iopbase[lcv].aud = 1; /* always the same */
xyc->iopbase[lcv].relo = 1; /* always the same */
xyc->iopbase[lcv].thro = XY_THRO;/* always the same */

if ((error = vme_dmamap_create(
ct, /* VME chip tag */
MAXPHYS, /* size */
VME_AM_A24, /* address modifier */
VME_D16, /* data size */
0, /* swap */
1, /* nsegments */
MAXPHYS, /* maxsegsz */
0, /* boundary */
BUS_DMA_NOWAIT,
&xyc->reqs[lcv].dmamap)) != 0) {

aprint_error_dev(xyc->sc_dev, "DMA buffer map create error %d\n",
error);
return;
}
}
xyc->ciorq = &xyc->reqs[XYC_CTLIOPB]; /* short hand name */
xyc->ciopb = &xyc->iopbase[XYC_CTLIOPB]; /* short hand name */
xyc->xy_hand = 0;

/* read controller parameters and insure we have a 450/451 */

error = xyc_cmd(xyc, XYCMD_ST, 0, 0, 0, 0, 0, XY_SUB_POLL);
res = xyc->ciopb->ctyp;
XYC_DONE(xyc, error);
if (res != XYCT_450) {
if (error)
printf(": %s: ", xyc_e2str(error));
printf(": doesn't identify as a 450/451\n");
return;
}
printf(": Xylogics 450/451");
if (xyc->no_ols)
printf(" [OLS disabled]"); /* 450 doesn't overlap seek right */
printf("\n");
if (error) {
aprint_error_dev(xyc->sc_dev, "error: %s\n",
xyc_e2str(error));
return;
}
if ((xyc->xyc->xyc_csr & XYC_ADRM) == 0) {
printf("%s: 24 bit addressing turned off\n",
device_xname(xyc->sc_dev));
printf("please set hardware jumpers JM1-JM2=in, JM3-JM4=out\n");
printf("to enable 24 bit mode and this driver\n");
return;
}

/* link in interrupt with higher level software */
vme_intr_map(ct, va->ilevel, va->ivector, &ih);
vme_intr_establish(ct, ih, IPL_BIO, xycintr, xyc);
evcnt_attach_dynamic(&xyc->sc_intrcnt, EVCNT_TYPE_INTR, NULL,
device_xname(xyc->sc_dev), "intr");

callout_init(&xyc->sc_tick_ch, 0);

/* now we must look for disks using autoconfig */
xa.fullmode = XY_SUB_POLL;
xa.booting = 1;

for (xa.driveno = 0; xa.driveno < XYC_MAXDEV; xa.driveno++)
(void) config_found(self, (void *) &xa, NULL, CFARGS_NONE);

/* start the watchdog clock */
callout_reset(&xyc->sc_tick_ch, XYC_TICKCNT, xyc_tick, xyc);

}

/*
* xymatch: probe for disk.
*
* note: we almost always say disk is present. this allows us to
* spin up and configure a disk after the system is booted (we can
* call xyattach!).
*/
int
xymatch(device_t parent, cfdata_t cf, void *aux)
{
struct xyc_attach_args *xa = aux;

/* looking for autoconf wildcard or exact match */

if (cf->cf_loc[XYCCF_DRIVE] != XYCCF_DRIVE_DEFAULT &&
cf->cf_loc[XYCCF_DRIVE] != xa->driveno)
return 0;

return 1;

}

/*
* xyattach: attach a disk. this can be called from autoconf and also
* from xyopen/xystrategy.
*/
void
xyattach(device_t parent, device_t self, void *aux)
{
struct xy_softc *xy = device_private(self), *oxy;
struct xyc_softc *xyc = device_private(parent);
struct xyc_attach_args *xa = aux;
int spt, mb, blk, lcv, fmode, s = 0, newstate;
struct dkbad *dkb;
int rseg, error;
bus_dma_segment_t seg;
bus_addr_t busaddr;
void * dmaddr;
char * buf;

xy->sc_dev = self;

/*
* Always re-initialize the disk structure. We want statistics
* to start with a clean slate.
*/
memset(&xy->sc_dk, 0, sizeof(xy->sc_dk));

/* if booting, init the xy_softc */

if (xa->booting) {
xy->state = XY_DRIVE_UNKNOWN; /* to start */
xy->flags = 0;
xy->parent = xyc;

/* init queue of waiting bufs */

bufq_alloc(&xy->xyq, "disksort", BUFQ_SORT_RAWBLOCK);

xy->xyrq = &xyc->reqs[xa->driveno];

}
xy->xy_drive = xa->driveno;
fmode = xa->fullmode;
xyc->sc_drives[xa->driveno] = xy;

/* if not booting, make sure we are the only process in the attach for
* this drive. if locked out, sleep on it. */

if (!xa->booting) {
s = splbio();
while (xy->state == XY_DRIVE_ATTACHING) {
if (tsleep(&xy->state, PRIBIO, "xyattach", 0)) {
splx(s);
return;
}
}
printf("%s at %s",
device_xname(xy->sc_dev), device_xname(xy->parent->sc_dev));
}

/* we now have control */
xy->state = XY_DRIVE_ATTACHING;
newstate = XY_DRIVE_UNKNOWN;

buf = NULL;
if ((error = xy_dmamem_alloc(xyc->dmatag, xyc->auxmap, &seg, &rseg,
XYFM_BPS,
(void **)&buf,
&busaddr)) != 0) {
aprint_error_dev(xyc->sc_dev, "DMA buffer alloc error %d\n",
error);
return;
}
dmaddr = (void *)(u_long)BUS_ADDR_PADDR(busaddr);

/* first try and reset the drive */
error = xyc_cmd(xyc, XYCMD_RST, 0, xy->xy_drive, 0, 0, 0, fmode);
XYC_DONE(xyc, error);
if (error == XY_ERR_DNRY) {
printf(" drive %d: off-line\n", xa->driveno);
goto done;
}
if (error) {
printf(": ERROR 0x%02x (%s)\n", error, xyc_e2str(error));
goto done;
}
printf(" drive %d: ready", xa->driveno);

/*
* now set drive parameters (to semi-bogus values) so we can read the
* disk label.
*/
xy->pcyl = xy->ncyl = 1;
xy->acyl = 0;
xy->nhead = 1;
xy->nsect = 1;
xy->sectpercyl = 1;
for (lcv = 0; lcv < 126; lcv++) /* init empty bad144 table */
xy->dkb.bt_bad[lcv].bt_cyl =
xy->dkb.bt_bad[lcv].bt_trksec = 0xffff;

/* read disk label */
for (xy->drive_type = 0 ; xy->drive_type <= XYC_MAXDT ;
xy->drive_type++) {
error = xyc_cmd(xyc, XYCMD_RD, 0, xy->xy_drive, 0, 1,
dmaddr, fmode);
XYC_DONE(xyc, error);
if (error == XY_ERR_AOK) break;
}

if (error != XY_ERR_AOK) {
aprint_normal("\n");
aprint_error_dev(xy->sc_dev, "reading disk label failed: %s\n",
xyc_e2str(error));
goto done;
}
printf(" (drive type %d)\n", xy->drive_type);

newstate = XY_DRIVE_NOLABEL;

xy->hw_spt = spt = 0; /* XXX needed ? */
/* Attach the disk: must be before getdisklabel to malloc label */
disk_init(&xy->sc_dk, device_xname(xy->sc_dev), &xydkdriver);
disk_attach(&xy->sc_dk);

if (xygetdisklabel(xy, buf) != XY_ERR_AOK)
goto done;

/* inform the user of what is up */
printf("%s: <%s>, pcyl %d\n", device_xname(xy->sc_dev),
buf, xy->pcyl);
mb = xy->ncyl * (xy->nhead * xy->nsect) / (1048576 / XYFM_BPS);
printf("%s: %dMB, %d cyl, %d head, %d sec, %d bytes/sec\n",
device_xname(xy->sc_dev), mb, xy->ncyl, xy->nhead, xy->nsect,
XYFM_BPS);

/*
* 450/451 stupidity: the drive type is encoded into the format
* of the disk. the drive type in the IOPB must match the drive
* type in the format, or you will not be able to do I/O to the
* disk (you get header not found errors). if you have two drives
* of different sizes that have the same drive type in their
* formatting then you are out of luck.
*
* this problem was corrected in the 753/7053.
*/

for (lcv = 0 ; lcv < XYC_MAXDEV ; lcv++) {
oxy = xyc->sc_drives[lcv];
if (oxy == NULL || oxy == xy) continue;
if (oxy->drive_type != xy->drive_type) continue;
if (xy->nsect != oxy->nsect || xy->pcyl != oxy->pcyl ||
xy->nhead != oxy->nhead) {
printf("%s: %s and %s must be the same size!\n",
device_xname(xyc->sc_dev), device_xname(xy->sc_dev),
device_xname(oxy->sc_dev));
panic("xy drive size mismatch");
}
}

/* now set the real drive parameters! */

blk = (xy->nsect - 1) +
((xy->nhead - 1) * xy->nsect) +
((xy->pcyl - 1) * xy->nsect * xy->nhead);
error = xyc_cmd(xyc, XYCMD_SDS, 0, xy->xy_drive, blk, 0, 0, fmode);
XYC_DONE(xyc, error);
if (error) {
aprint_error_dev(xy->sc_dev, "write drive size failed: %s\n",
xyc_e2str(error));
goto done;
}
newstate = XY_DRIVE_ONLINE;

/*
* read bad144 table. this table resides on the first sector of the
* last track of the disk (i.e. second cyl of "acyl" area).
*/

blk = (xy->ncyl + xy->acyl - 1) * (xy->nhead * xy->nsect) +
/* last cyl */
(xy->nhead - 1) * xy->nsect; /* last head */
error = xyc_cmd(xyc, XYCMD_RD, 0, xy->xy_drive, blk, 1,
dmaddr, fmode);
XYC_DONE(xyc, error);
if (error) {
aprint_error_dev(xy->sc_dev, "reading bad144 failed: %s\n",
xyc_e2str(error));
goto done;
}

/* check dkbad for sanity */
dkb = (struct dkbad *) buf;
for (lcv = 0; lcv < 126; lcv++) {
if ((dkb->bt_bad[lcv].bt_cyl == 0xffff ||
dkb->bt_bad[lcv].bt_cyl == 0) &&
dkb->bt_bad[lcv].bt_trksec == 0xffff)
continue; /* blank */
if (dkb->bt_bad[lcv].bt_cyl >= xy->ncyl)
break;
if ((dkb->bt_bad[lcv].bt_trksec >> 8) >= xy->nhead)
break;
if ((dkb->bt_bad[lcv].bt_trksec & 0xff) >= xy->nsect)
break;
}
if (lcv != 126) {
aprint_error_dev(xy->sc_dev, "warning: invalid bad144 sector!\n");
} else {
memcpy(&xy->dkb, buf, XYFM_BPS);
}

done:
if (buf != NULL) {
xy_dmamem_free(xyc->dmatag, xyc->auxmap,
&seg, rseg, XYFM_BPS, buf);
}

xy->state = newstate;
if (!xa->booting) {
wakeup(&xy->state);
splx(s);
}
}

/*
* end of autoconfig functions
*/

/*
* { b , c } d e v s w f u n c t i o n s
*/

/*
* xyclose: close device
*/
int
xyclose(dev_t dev, int flag, int fmt, struct lwp *l)
{
struct xy_softc *xy = device_lookup_private(&xy_cd, DISKUNIT(dev));
int part = DISKPART(dev);

/* clear mask bits */

switch (fmt) {
case S_IFCHR:
xy->sc_dk.dk_copenmask &= ~(1 << part);
break;
case S_IFBLK:
xy->sc_dk.dk_bopenmask &= ~(1 << part);
break;
}
xy->sc_dk.dk_openmask = xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask;

return 0;
}

/*
* xydump: crash dump system
*/
int
xydump(dev_t dev, daddr_t blkno, void *va, size_t size)
{
int unit, part;
struct xy_softc *xy;

unit = DISKUNIT(dev);
part = DISKPART(dev);

xy = device_lookup_private(&xy_cd, unit);
if (!xy)
return ENXIO;

printf("%s%c: crash dump not supported (yet)\n", device_xname(xy->sc_dev),
'a' + part);

return ENXIO;

/* outline: globals: "dumplo" == sector number of partition to start
* dump at (convert to physical sector with partition table)
* "dumpsize" == size of dump in clicks "physmem" == size of physical
* memory (clicks, ctob() to get bytes) (normal case: dumpsize ==
* physmem)
*
* dump a copy of physical memory to the dump device starting at sector
* "dumplo" in the swap partition (make sure > 0). map in pages as
* we go. use polled I/O.
*
* XXX how to handle NON_CONTIG? */

}

static enum kauth_device_req
xy_getkauthreq(u_char cmd)
{
enum kauth_device_req req;

switch (cmd) {
case XYCMD_WR:
case XYCMD_WTH:
case XYCMD_WFM:
case XYCMD_WRH:
req = KAUTH_REQ_DEVICE_RAWIO_PASSTHRU_WRITE;
break;

case XYCMD_RD:
case XYCMD_RTH:
case XYCMD_RDH:
req = KAUTH_REQ_DEVICE_RAWIO_PASSTHRU_READ;
break;

case XYCMD_RDS:
case XYCMD_MBD:
req = KAUTH_REQ_DEVICE_RAWIO_PASSTHRU_READCONF;
break;

case XYCMD_RST:
case XYCMD_SDS:
case XYCMD_MBL:
req = KAUTH_REQ_DEVICE_RAWIO_PASSTHRU_WRITECONF;
break;

case XYCMD_NOP:
case XYCMD_SK:
case XYCMD_ST:
case XYCMD_R:
default:
req = 0;
break;
}

return (req);
}

/*
* xyioctl: ioctls on XY drives. based on ioctl's of other netbsd disks.
*/
int
xyioctl(dev_t dev, u_long command, void *addr, int flag, struct lwp *l)
{
struct xy_softc *xy;
struct xd_iocmd *xio;
int error, s, unit;
#ifdef __HAVE_OLD_DISKLABEL
struct disklabel newlabel;
#endif
struct disklabel *lp;

unit = DISKUNIT(dev);

if ((xy = device_lookup_private(&xy_cd, unit)) == NULL)
return (ENXIO);

error = disk_ioctl(&xy->sc_dk, dev, command, addr, flag, l);
if (error != EPASSTHROUGH)
return error;

/* switch on ioctl type */

switch (command) {
case DIOCSBAD: /* set bad144 info */
if ((flag & FWRITE) == 0)
return EBADF;
s = splbio();
memcpy(&xy->dkb, addr, sizeof(xy->dkb));
splx(s);
return 0;

case DIOCSDINFO: /* set disk label */
#ifdef __HAVE_OLD_DISKLABEL
case ODIOCSDINFO:
if (command == ODIOCSDINFO) {
memset(&newlabel, 0, sizeof newlabel);
memcpy(&newlabel, addr, sizeof (struct olddisklabel));
lp = &newlabel;
} else
#endif
lp = (struct disklabel *)addr;

if ((flag & FWRITE) == 0)
return EBADF;
error = setdisklabel(xy->sc_dk.dk_label,
lp, /* xy->sc_dk.dk_openmask : */ 0,
xy->sc_dk.dk_cpulabel);
if (error == 0) {
if (xy->state == XY_DRIVE_NOLABEL)
xy->state = XY_DRIVE_ONLINE;
}
return error;

case DIOCWLABEL: /* change write status of disk label */
if ((flag & FWRITE) == 0)
return EBADF;
if (*(int *) addr)
xy->flags |= XY_WLABEL;
else
xy->flags &= ~XY_WLABEL;
return 0;

case DIOCWDINFO: /* write disk label */
#ifdef __HAVE_OLD_DISKLABEL
case ODIOCWDINFO:
if (command == ODIOCWDINFO) {
memset(&newlabel, 0, sizeof newlabel);
memcpy(&newlabel, addr, sizeof (struct olddisklabel));
lp = &newlabel;
} else
#endif
lp = (struct disklabel *)addr;

if ((flag & FWRITE) == 0)
return EBADF;
error = setdisklabel(xy->sc_dk.dk_label,
lp, /* xy->sc_dk.dk_openmask : */ 0,
xy->sc_dk.dk_cpulabel);
if (error == 0) {
if (xy->state == XY_DRIVE_NOLABEL)
xy->state = XY_DRIVE_ONLINE;

/* Simulate opening partition 0 so write succeeds. */
xy->sc_dk.dk_openmask |= (1 << 0);
error = writedisklabel(MAKEDISKDEV(major(dev), DISKUNIT(dev), RAW_PART),
xystrategy, xy->sc_dk.dk_label,
xy->sc_dk.dk_cpulabel);
xy->sc_dk.dk_openmask =
xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask;
}
return error;

case DIOSXDCMD: {
enum kauth_device_req req;

xio = (struct xd_iocmd *) addr;
req = xy_getkauthreq(xio->cmd);
if ((error = kauth_authorize_device_passthru(l->l_cred,
dev, req, xio)) != 0)
return (error);
return (xyc_ioctlcmd(xy, dev, xio));
}

default:
return ENOTTY;
}
}

/*
* xyopen: open drive
*/

int
xyopen(dev_t dev, int flag, int fmt, struct lwp *l)
{
int unit, part;
struct xy_softc *xy;
struct xyc_attach_args xa;

/* first, could it be a valid target? */

unit = DISKUNIT(dev);
if ((xy = device_lookup_private(&xy_cd, unit)) == NULL)
return (ENXIO);
part = DISKPART(dev);

/* do we need to attach the drive? */

if (xy->state == XY_DRIVE_UNKNOWN) {
xa.driveno = xy->xy_drive;
xa.fullmode = XY_SUB_WAIT;
xa.booting = 0;
xyattach(xy->parent->sc_dev, xy->sc_dev, &xa);
if (xy->state == XY_DRIVE_UNKNOWN) {
return (EIO);
}
}
/* check for partition */

if (part != RAW_PART &&
(part >= xy->sc_dk.dk_label->d_npartitions ||
xy->sc_dk.dk_label->d_partitions[part].p_fstype == FS_UNUSED)) {
return (ENXIO);
}
/* set open masks */

switch (fmt) {
case S_IFCHR:
xy->sc_dk.dk_copenmask |= (1 << part);
break;
case S_IFBLK:
xy->sc_dk.dk_bopenmask |= (1 << part);
break;
}
xy->sc_dk.dk_openmask = xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask;

return 0;
}

int
xyread(dev_t dev, struct uio *uio, int flags)
{

return (physio(xystrategy, NULL, dev, B_READ, minphys, uio));
}

int
xywrite(dev_t dev, struct uio *uio, int flags)
{

return (physio(xystrategy, NULL, dev, B_WRITE, minphys, uio));
}

/*
* xysize: return size of a partition for a dump
*/

int
xysize(dev_t dev)
{
struct xy_softc *xysc;
int unit, part, size, omask;

/* valid unit? */
unit = DISKUNIT(dev);
if ((xysc = device_lookup_private(&xy_cd, unit)) == NULL)
return (-1);

part = DISKPART(dev);
omask = xysc->sc_dk.dk_openmask & (1 << part);

if (omask == 0 && xyopen(dev, 0, S_IFBLK, NULL) != 0)
return (-1);

/* do it */
if (xysc->sc_dk.dk_label->d_partitions[part].p_fstype != FS_SWAP)
size = -1; /* only give valid size for swap partitions */
else
size = xysc->sc_dk.dk_label->d_partitions[part].p_size *
(xysc->sc_dk.dk_label->d_secsize / DEV_BSIZE);
if (omask == 0 && xyclose(dev, 0, S_IFBLK, NULL) != 0)
return (-1);
return (size);
}

/*
* xystrategy: buffering system interface to xy.
*/

void
xystrategy(struct buf *bp)
{
struct xy_softc *xy;
int s, unit;
struct xyc_attach_args xa;
struct disklabel *lp;
daddr_t blkno;

unit = DISKUNIT(bp->b_dev);

/* check for live device */

if (!(xy = device_lookup_private(&xy_cd, unit)) ||
bp->b_blkno < 0 ||
(bp->b_bcount % xy->sc_dk.dk_label->d_secsize) != 0) {
bp->b_error = EINVAL;
goto done;
}
/* do we need to attach the drive? */

if (xy->state == XY_DRIVE_UNKNOWN) {
xa.driveno = xy->xy_drive;
xa.fullmode = XY_SUB_WAIT;
xa.booting = 0;
xyattach(xy->parent->sc_dev, xy->sc_dev, &xa);
if (xy->state == XY_DRIVE_UNKNOWN) {
bp->b_error = EIO;
goto done;
}
}
if (xy->state != XY_DRIVE_ONLINE && DISKPART(bp->b_dev) != RAW_PART) {
/* no I/O to unlabeled disks, unless raw partition */
bp->b_error = EIO;
goto done;
}
/* short circuit zero length request */

if (bp->b_bcount == 0)
goto done;

/* check bounds with label (disksubr.c). Determine the size of the
* transfer, and make sure it is within the boundaries of the
* partition. Adjust transfer if needed, and signal errors or early
* completion. */

lp = xy->sc_dk.dk_label;

if (bounds_check_with_label(&xy->sc_dk, bp,
(xy->flags & XY_WLABEL) != 0) <= 0)
goto done;

/*
* Now convert the block number to absolute and put it in
* terms of the device's logical block size.
*/
blkno = bp->b_blkno / (lp->d_secsize / DEV_BSIZE);
if (DISKPART(bp->b_dev) != RAW_PART)
blkno += lp->d_partitions[DISKPART(bp->b_dev)].p_offset;

bp->b_rawblkno = blkno;

/*
* now we know we have a valid buf structure that we need to do I/O
* on.
*/
s = splbio(); /* protect the queues */

bufq_put(xy->xyq, bp);

/* start 'em up */

xyc_start(xy->parent, NULL);

/* done! */

splx(s);
return;

done: /* tells upper layers we are done with this
* buf */
bp->b_resid = bp->b_bcount;
biodone(bp);
}
/*
* end of {b,c}devsw functions
*/

/*
* i n t e r r u p t f u n c t i o n
*
* xycintr: hardware interrupt.
*/
int
xycintr(void *v)
{
struct xyc_softc *xycsc = v;

/* kick the event counter */

xycsc->sc_intrcnt.ev_count++;

/* remove as many done IOPBs as possible */

xyc_remove_iorq(xycsc);

/* start any iorq's already waiting */

xyc_start(xycsc, NULL);

return (1);
}
/*
* end of interrupt function
*/

/*
* i n t e r n a l f u n c t i o n s
*/

/*
* xyc_rqinit: fill out the fields of an I/O request
*/

inline void
xyc_rqinit(struct xy_iorq *rq, struct xyc_softc *xyc, struct xy_softc *xy, int md, u_long blk, int cnt, void *db, struct buf *bp)
{
rq->xyc = xyc;
rq->xy = xy;
rq->ttl = XYC_MAXTTL + 10;
rq->mode = md;
rq->tries = rq->errnum = rq->lasterror = 0;
rq->blockno = blk;
rq->sectcnt = cnt;
rq->dbuf = db;
rq->buf = bp;
}

/*
* xyc_rqtopb: load up an IOPB based on an iorq
*/

void
xyc_rqtopb(struct xy_iorq *iorq, struct xy_iopb *iopb, int cmd, int subfun)
{
u_long block, dp;

/* normal IOPB case, standard stuff */

/* chain bit handled later */
iopb->ien = (XY_STATE(iorq->mode) == XY_SUB_POLL) ? 0 : 1;
iopb->com = cmd;
iopb->errnum = 0;
iopb->errs = 0;
iopb->done = 0;
if (iorq->xy) {
iopb->unit = iorq->xy->xy_drive;
iopb->dt = iorq->xy->drive_type;
} else {
iopb->unit = 0;
iopb->dt = 0;
}
block = iorq->blockno;
if (iorq->xy == NULL || block == 0) {
iopb->sect = iopb->head = iopb->cyl = 0;
} else {
iopb->sect = block % iorq->xy->nsect;
block = block / iorq->xy->nsect;
iopb->head = block % iorq->xy->nhead;
block = block / iorq->xy->nhead;
iopb->cyl = block;
}
iopb->scnt = iorq->sectcnt;
dp = (u_long) iorq->dbuf;
if (iorq->dbuf == NULL) {
iopb->dataa = 0;
iopb->datar = 0;
} else {
iopb->dataa = (dp & 0xffff);
iopb->datar = ((dp & 0xff0000) >> 16);
}
iopb->subfn = subfun;
}

/*
* xyc_unbusy: wait for the xyc to go unbusy, or timeout.
*/

int
xyc_unbusy(struct xyc *xyc, int del)
{
while (del-- > 0) {
if ((xyc->xyc_csr & XYC_GBSY) == 0)
break;
DELAY(1);
}
return(del == 0 ? XY_ERR_FAIL : XY_ERR_AOK);
}

/*
* xyc_cmd: front end for POLL'd and WAIT'd commands. Returns 0 or error.
* note that NORM requests are handled separately.
*/
int
xyc_cmd(struct xyc_softc *xycsc, int cmd, int subfn, int unit, int block,
int scnt, char *dptr, int fullmode)
{
int submode = XY_STATE(fullmode);
struct xy_iorq *iorq = xycsc->ciorq;
struct xy_iopb *iopb = xycsc->ciopb;

/*
* is someone else using the control iopq wait for it if we can
*/
start:
if (submode == XY_SUB_WAIT && XY_STATE(iorq->mode) != XY_SUB_FREE) {
if (tsleep(iorq, PRIBIO, "xyc_cmd", 0))
return(XY_ERR_FAIL);
goto start;
}

if (XY_STATE(iorq->mode) != XY_SUB_FREE) {
DELAY(1000000); /* XY_SUB_POLL: steal the iorq */
iorq->mode = XY_SUB_FREE;
printf("%s: stole control iopb\n", device_xname(xycsc->sc_dev));
}

/* init iorq/iopb */

xyc_rqinit(iorq, xycsc,
(unit == XYC_NOUNIT) ? NULL : xycsc->sc_drives[unit],
fullmode, block, scnt, dptr, NULL);

/* load IOPB from iorq */

xyc_rqtopb(iorq, iopb, cmd, subfn);

/* submit it for processing */

xyc_submit_iorq(xycsc, iorq, fullmode); /* error code will be in iorq */

return(XY_ERR_AOK);
}

/*
* xyc_startbuf
* start a buffer for running
*/

int
xyc_startbuf(struct xyc_softc *xycsc, struct xy_softc *xysc, struct buf *bp)
{
#ifdef XYC_DEBUG
int partno;
#endif
int error;
struct xy_iorq *iorq;
struct xy_iopb *iopb;
u_long block;

iorq = xysc->xyrq;
iopb = iorq->iopb;

/* get buf */

if (bp == NULL)
panic("xyc_startbuf null buf");

#ifdef XYC_DEBUG
partno = DISKPART(bp->b_dev);
printf("xyc_startbuf: %s%c: %s block %d\n", device_xname(xysc->sc_dev),
'a' + partno, (bp->b_flags & B_READ) ? "read" : "write", bp->b_blkno);
printf("xyc_startbuf: b_bcount %d, b_data 0x%x\n",
bp->b_bcount, bp->b_data);
#endif

/*
* load request.
*
* note that iorq points to the buffer as mapped into DVMA space,
* where as the bp->b_data points to its non-DVMA mapping.
*/

block = bp->b_rawblkno;

error = bus_dmamap_load(xycsc->dmatag, iorq->dmamap,
bp->b_data, bp->b_bcount, 0, BUS_DMA_NOWAIT);
if (error != 0) {
aprint_error_dev(xycsc->sc_dev, "warning: cannot load DMA map\n");
return (XY_ERR_FAIL); /* XXX: need some sort of
* call-back scheme here? */
}

bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0,
iorq->dmamap->dm_mapsize, (bp->b_flags & B_READ)
? BUS_DMASYNC_PREREAD
: BUS_DMASYNC_PREWRITE);

/* init iorq and load iopb from it */
xyc_rqinit(iorq, xycsc, xysc, XY_SUB_NORM | XY_MODE_VERBO, block,
bp->b_bcount / XYFM_BPS,
(void *)(u_long)iorq->dmamap->dm_segs[0].ds_addr,
bp);

xyc_rqtopb(iorq, iopb, (bp->b_flags & B_READ) ? XYCMD_RD : XYCMD_WR, 0);

/* Instrumentation. */
disk_busy(&xysc->sc_dk);

return (XY_ERR_AOK);
}

/*
* xyc_submit_iorq: submit an iorq for processing. returns XY_ERR_AOK
* if ok. if it fail returns an error code. type is XY_SUB_*.
*
* note: caller frees iorq in all cases except NORM
*
* return value:
* NORM: XY_AOK (req pending), XY_FAIL (couldn't submit request)
* WAIT: XY_AOK (success), <error-code> (failed)
* POLL: <same as WAIT>
* NOQ : <same as NORM>
*
* there are three sources for i/o requests:
* [1] xystrategy: normal block I/O, using "struct buf" system.
* [2] autoconfig/crash dump: these are polled I/O requests, no interrupts.
* [3] open/ioctl: these are I/O requests done in the context of a process,
* and the process should block until they are done.
*
* software state is stored in the iorq structure. each iorq has an
* iopb structure. the hardware understands the iopb structure.
* every command must go through an iopb. a 450 handles one iopb at a
* time, where as a 451 can take them in chains. [the 450 claims it
* can handle chains, but is appears to be buggy...] iopb are allocated
* in DVMA space at boot up time. each disk gets one iopb, and the
* controller gets one (for POLL and WAIT commands). what happens if
* the iopb is busy? for i/o type [1], the buffers are queued at the
* "buff" layer and * picked up later by the interrupt routine. for case
* [2] we can only be blocked if there is a WAIT type I/O request being
* run. since this can only happen when we are crashing, we wait a sec
* and then steal the IOPB. for case [3] the process can sleep
* on the iorq free list until some iopbs are available.
*/

int
xyc_submit_iorq(struct xyc_softc *xycsc, struct xy_iorq *iorq, int type)
{
struct xy_iopb *dmaiopb;

#ifdef XYC_DEBUG
printf("xyc_submit_iorq(%s, addr=0x%x, type=%d)\n",
device_xname(xycsc->sc_dev), iorq, type);
#endif

/* first check and see if controller is busy */
if ((xycsc->xyc->xyc_csr & XYC_GBSY) != 0) {
#ifdef XYC_DEBUG
printf("xyc_submit_iorq: XYC not ready (BUSY)\n");
#endif
if (type == XY_SUB_NOQ)
return (XY_ERR_FAIL); /* failed */
switch (type) {
case XY_SUB_NORM:
return XY_ERR_AOK; /* success */
case XY_SUB_WAIT:
while (iorq->iopb->done == 0) {
(void) tsleep(iorq, PRIBIO, "xyciorq", 0);
}
return (iorq->errnum);
case XY_SUB_POLL: /* steal controller */
(void)xycsc->xyc->xyc_rsetup; /* RESET */
if (xyc_unbusy(xycsc->xyc,XYC_RESETUSEC) == XY_ERR_FAIL)
panic("xyc_submit_iorq: stuck xyc");
printf("%s: stole controller\n",
device_xname(xycsc->sc_dev));
break;
default:
panic("xyc_submit_iorq adding");
}
}

dmaiopb = xyc_chain(xycsc, iorq); /* build chain */
if (dmaiopb == NULL) { /* nothing doing? */
if (type == XY_SUB_NORM || type == XY_SUB_NOQ)
return(XY_ERR_AOK);
panic("xyc_submit_iorq: xyc_chain failed!");
}

XYC_GO(xycsc->xyc, dmaiopb);

/* command now running, wrap it up */
switch (type) {
case XY_SUB_NORM:
case XY_SUB_NOQ:
return (XY_ERR_AOK); /* success */
case XY_SUB_WAIT:
while (iorq->iopb->done == 0) {
(void) tsleep(iorq, PRIBIO, "xyciorq", 0);
}
return (iorq->errnum);
case XY_SUB_POLL:
return (xyc_piodriver(xycsc, iorq));
default:
panic("xyc_submit_iorq wrap up");
}
panic("xyc_submit_iorq");
return 0; /* not reached */
}

/*
* xyc_chain: build a chain. return dvma address of first element in
* the chain. iorq != NULL: means we only want that item on the chain.
*/

struct xy_iopb *
xyc_chain(struct xyc_softc *xycsc, struct xy_iorq *iorq)
{
int togo, chain, hand;

memset(xycsc->xy_chain, 0, sizeof(xycsc->xy_chain));

/*
* promote control IOPB to the top
*/
if (iorq == NULL) {
if ((XY_STATE(xycsc->reqs[XYC_CTLIOPB].mode) == XY_SUB_POLL ||
XY_STATE(xycsc->reqs[XYC_CTLIOPB].mode) == XY_SUB_WAIT) &&
xycsc->iopbase[XYC_CTLIOPB].done == 0)
iorq = &xycsc->reqs[XYC_CTLIOPB];
}

/*
* special case: if iorq != NULL then we have a POLL or WAIT request.
* we let these take priority and do them first.
*/
if (iorq) {
xycsc->xy_chain[0] = iorq;
iorq->iopb->chen = 0;
return(iorq->dmaiopb);
}

/*
* NORM case: do round robin and maybe chain (if allowed and possible)
*/
chain = 0;
hand = xycsc->xy_hand;
xycsc->xy_hand = (xycsc->xy_hand + 1) % XYC_MAXIOPB;

for (togo = XYC_MAXIOPB; togo > 0;
togo--, hand = (hand + 1) % XYC_MAXIOPB) {
struct xy_iopb *iopb, *prev_iopb, *dmaiopb;

if (XY_STATE(xycsc->reqs[hand].mode) != XY_SUB_NORM ||
xycsc->iopbase[hand].done)
continue; /* not ready-for-i/o */

xycsc->xy_chain[chain] = &xycsc->reqs[hand];
iopb = xycsc->xy_chain[chain]->iopb;
iopb->chen = 0;
if (chain != 0) {
/* adding a link to a chain */
prev_iopb = xycsc->xy_chain[chain-1]->iopb;
prev_iopb->chen = 1;
dmaiopb = xycsc->xy_chain[chain]->dmaiopb;
prev_iopb->nxtiopb = ((u_long)dmaiopb) & 0xffff;
} else {
/* head of chain */
iorq = xycsc->xy_chain[chain];
}
chain++;

/* quit if chaining dis-allowed */
if (xycsc->no_ols)
break;
}

return(iorq ? iorq->dmaiopb : NULL);
}

/*
* xyc_piodriver
*
* programmed i/o driver. this function takes over the computer
* and drains off the polled i/o request. it returns the status of the iorq
* the caller is interesting in.
*/
int
xyc_piodriver(struct xyc_softc *xycsc, struct xy_iorq *iorq)
{
int nreset = 0;
int retval = 0;
u_long res;
#ifdef XYC_DEBUG
printf("xyc_piodriver(%s, 0x%x)\n", device_xname(xycsc->sc_dev), iorq);
#endif

while (iorq->iopb->done == 0) {

res = xyc_unbusy(xycsc->xyc, XYC_MAXTIME);

/* we expect some progress soon */
if (res == XY_ERR_FAIL && nreset >= 2) {
xyc_reset(xycsc, 0, XY_RSET_ALL, XY_ERR_FAIL, 0);
#ifdef XYC_DEBUG
printf("xyc_piodriver: timeout\n");
#endif
return (XY_ERR_FAIL);
}
if (res == XY_ERR_FAIL) {
if (xyc_reset(xycsc, 0,
(nreset++ == 0) ? XY_RSET_NONE : iorq,
XY_ERR_FAIL,
0) == XY_ERR_FAIL)
return (XY_ERR_FAIL); /* flushes all but POLL
* requests, resets */
continue;
}

xyc_remove_iorq(xycsc); /* may resubmit request */

if (iorq->iopb->done == 0)
xyc_start(xycsc, iorq);
}

/* get return value */

retval = iorq->errnum;

#ifdef XYC_DEBUG
printf("xyc_piodriver: done, retval = 0x%x (%s)\n",
iorq->errnum, xyc_e2str(iorq->errnum));
#endif

/* start up any bufs that have queued */

xyc_start(xycsc, NULL);

return (retval);
}

/*
* xyc_xyreset: reset one drive. NOTE: assumes xyc was just reset.
* we steal iopb[XYC_CTLIOPB] for this, but we put it back when we are done.
*/
void
xyc_xyreset(struct xyc_softc *xycsc, struct xy_softc *xysc)
{
struct xy_iopb tmpiopb;
struct xy_iopb *iopb;
int del;

iopb = xycsc->ciopb;

/* Save contents */
memcpy(&tmpiopb, iopb, sizeof(struct xy_iopb));

iopb->chen = iopb->done = iopb->errs = 0;
iopb->ien = 0;
iopb->com = XYCMD_RST;
iopb->unit = xysc->xy_drive;

XYC_GO(xycsc->xyc, xycsc->ciorq->dmaiopb);

del = XYC_RESETUSEC;
while (del > 0) {
if ((xycsc->xyc->xyc_csr & XYC_GBSY) == 0)
break;
DELAY(1);
del--;
}

if (del <= 0 || iopb->errs) {
printf("%s: off-line: %s\n", device_xname(xycsc->sc_dev),
xyc_e2str(iopb->errnum));
del = xycsc->xyc->xyc_rsetup;
if (xyc_unbusy(xycsc->xyc, XYC_RESETUSEC) == XY_ERR_FAIL)
panic("xyc_reset");
} else {
xycsc->xyc->xyc_csr = XYC_IPND; /* clear IPND */
}

/* Restore contents */
memcpy(iopb, &tmpiopb, sizeof(struct xy_iopb));
}

/*
* xyc_reset: reset everything: requests are marked as errors except
* a polled request (which is resubmitted)
*/
int
xyc_reset(struct xyc_softc *xycsc, int quiet, struct xy_iorq *blastmode,
int error, struct xy_softc *xysc)
{
int del = 0, lcv, retval = XY_ERR_AOK;

/* soft reset hardware */

if (!quiet)
printf("%s: soft reset\n", device_xname(xycsc->sc_dev));
del = xycsc->xyc->xyc_rsetup;
del = xyc_unbusy(xycsc->xyc, XYC_RESETUSEC);
if (del == XY_ERR_FAIL) {
blastmode = XY_RSET_ALL; /* dead, flush all requests */
retval = XY_ERR_FAIL;
}
if (xysc)
xyc_xyreset(xycsc, xysc);

/* fix queues based on "blast-mode" */

for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) {
register struct xy_iorq *iorq = &xycsc->reqs[lcv];

if (XY_STATE(iorq->mode) != XY_SUB_POLL &&
XY_STATE(iorq->mode) != XY_SUB_WAIT &&
XY_STATE(iorq->mode) != XY_SUB_NORM)
/* is it active? */
continue;

if (blastmode == XY_RSET_ALL ||
blastmode != iorq) {
/* failed */
iorq->errnum = error;
xycsc->iopbase[lcv].done = xycsc->iopbase[lcv].errs = 1;
switch (XY_STATE(iorq->mode)) {
case XY_SUB_NORM:
iorq->buf->b_error = EIO;
iorq->buf->b_resid = iorq->sectcnt * XYFM_BPS;

bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0,
iorq->dmamap->dm_mapsize,
(iorq->buf->b_flags & B_READ)
? BUS_DMASYNC_POSTREAD
: BUS_DMASYNC_POSTWRITE);

bus_dmamap_unload(xycsc->dmatag, iorq->dmamap);

(void)bufq_get(iorq->xy->xyq);
disk_unbusy(&xycsc->reqs[lcv].xy->sc_dk,
(xycsc->reqs[lcv].buf->b_bcount -
xycsc->reqs[lcv].buf->b_resid),
(xycsc->reqs[lcv].buf->b_flags & B_READ));
biodone(iorq->buf);
iorq->mode = XY_SUB_FREE;
break;
case XY_SUB_WAIT:
wakeup(iorq);
case XY_SUB_POLL:
iorq->mode =
XY_NEWSTATE(iorq->mode, XY_SUB_DONE);
break;
}

} else {

/* resubmit, no need to do anything here */
}
}

/*
* now, if stuff is waiting, start it.
* since we just reset it should go
*/
xyc_start(xycsc, NULL);

return (retval);
}

/*
* xyc_start: start waiting buffers
*/

void
xyc_start(struct xyc_softc *xycsc, struct xy_iorq *iorq)
{
int lcv;
struct xy_softc *xy;

if (iorq == NULL) {
for (lcv = 0; lcv < XYC_MAXDEV ; lcv++) {
if ((xy = xycsc->sc_drives[lcv]) == NULL) continue;
if (bufq_peek(xy->xyq) == NULL) continue;
if (xy->xyrq->mode != XY_SUB_FREE) continue;
xyc_startbuf(xycsc, xy, bufq_peek(xy->xyq));
}
}
xyc_submit_iorq(xycsc, iorq, XY_SUB_NOQ);
}

/*
* xyc_remove_iorq: remove "done" IOPB's.
*/

int
xyc_remove_iorq(struct xyc_softc *xycsc)
{
int errnum, rq, comm, errs;
struct xyc *xyc = xycsc->xyc;
u_long addr;
struct xy_iopb *iopb;
struct xy_iorq *iorq;
struct buf *bp;

if (xyc->xyc_csr & XYC_DERR) {
/*
* DOUBLE ERROR: should never happen under normal use. This
* error is so bad, you can't even tell which IOPB is bad, so
* we dump them all.
*/
errnum = XY_ERR_DERR;
aprint_error_dev(xycsc->sc_dev, "DOUBLE ERROR!\n");
if (xyc_reset(xycsc, 0, XY_RSET_ALL, errnum, 0) != XY_ERR_AOK) {
aprint_error_dev(xycsc->sc_dev, "soft reset failed!\n");
panic("xyc_remove_iorq: controller DEAD");
}
return (XY_ERR_AOK);
}

/*
* get iopb that is done, loop down the chain
*/

if (xyc->xyc_csr & XYC_ERR) {
xyc->xyc_csr = XYC_ERR; /* clear error condition */
}
if (xyc->xyc_csr & XYC_IPND) {
xyc->xyc_csr = XYC_IPND; /* clear interrupt */
}

for (rq = 0; rq < XYC_MAXIOPB; rq++) {
iorq = xycsc->xy_chain[rq];
if (iorq == NULL) break; /* done ! */
if (iorq->mode == 0 || XY_STATE(iorq->mode) == XY_SUB_DONE)
continue; /* free, or done */
iopb = iorq->iopb;
if (iopb->done == 0)
continue; /* not done yet */

comm = iopb->com;
errs = iopb->errs;

if (errs)
iorq->errnum = iopb->errnum;
else
iorq->errnum = 0;

/* handle non-fatal errors */

if (errs &&
xyc_error(xycsc, iorq, iopb, comm) == XY_ERR_AOK)
continue; /* AOK: we resubmitted it */

/* this iorq is now done (hasn't been restarted or anything) */

if ((iorq->mode & XY_MODE_VERBO) && iorq->lasterror)
xyc_perror(iorq, iopb, 0);

/* now, if read/write check to make sure we got all the data
* we needed. (this may not be the case if we got an error in
* the middle of a multisector request). */

if ((iorq->mode & XY_MODE_B144) != 0 && errs == 0 &&
(comm == XYCMD_RD || comm == XYCMD_WR)) {
/* we just successfully processed a bad144 sector
* note: if we are in bad 144 mode, the pointers have
* been advanced already (see above) and are pointing
* at the bad144 sector. to exit bad144 mode, we
* must advance the pointers 1 sector and issue a new
* request if there are still sectors left to process
*
*/
XYC_ADVANCE(iorq, 1); /* advance 1 sector */

/* exit b144 mode */
iorq->mode = iorq->mode & (~XY_MODE_B144);

if (iorq->sectcnt) { /* more to go! */
iorq->lasterror = iorq->errnum = iopb->errnum = 0;
iopb->errs = iopb->done = 0;
iorq->tries = 0;
iopb->scnt = iorq->sectcnt;
iopb->cyl = iorq->blockno /
iorq->xy->sectpercyl;
iopb->head =
(iorq->blockno / iorq->xy->nhead) %
iorq->xy->nhead;
iopb->sect = iorq->blockno % XYFM_BPS;
addr = (u_long) iorq->dbuf;
iopb->dataa = (addr & 0xffff);
iopb->datar = ((addr & 0xff0000) >> 16);
/* will resubit at end */
continue;
}
}
/* final cleanup, totally done with this request */

switch (XY_STATE(iorq->mode)) {
case XY_SUB_NORM:
bp = iorq->buf;
if (errs) {
bp->b_error = EIO;
bp->b_resid = iorq->sectcnt * XYFM_BPS;
} else {
bp->b_resid = 0; /* done */
}
bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0,
iorq->dmamap->dm_mapsize,
(iorq->buf->b_flags & B_READ)
? BUS_DMASYNC_POSTREAD
: BUS_DMASYNC_POSTWRITE);

bus_dmamap_unload(xycsc->dmatag, iorq->dmamap);

(void)bufq_get(iorq->xy->xyq);
disk_unbusy(&iorq->xy->sc_dk,
(bp->b_bcount - bp->b_resid),
(bp->b_flags & B_READ));
iorq->mode = XY_SUB_FREE;
biodone(bp);
break;
case XY_SUB_WAIT:
iorq->mode = XY_NEWSTATE(iorq->mode, XY_SUB_DONE);
wakeup(iorq);
break;
case XY_SUB_POLL:
iorq->mode = XY_NEWSTATE(iorq->mode, XY_SUB_DONE);
break;
}
}

return (XY_ERR_AOK);
}

/*
* xyc_perror: print error.
* - if still_trying is true: we got an error, retried and got a
* different error. in that case lasterror is the old error,
* and errnum is the new one.
* - if still_trying is not true, then if we ever had an error it
* is in lasterror. also, if iorq->errnum == 0, then we recovered
* from that error (otherwise iorq->errnum == iorq->lasterror).
*/
void
xyc_perror(struct xy_iorq *iorq, struct xy_iopb *iopb, int still_trying)
{

int error = iorq->lasterror;

printf("%s", (iorq->xy) ? device_xname(iorq->xy->sc_dev)
: device_xname(iorq->xyc->sc_dev));
if (iorq->buf)
printf("%c: ", 'a' + (char)DISKPART(iorq->buf->b_dev));
if (iopb->com == XYCMD_RD || iopb->com == XYCMD_WR)
printf("%s %d/%d/%d: ",
(iopb->com == XYCMD_RD) ? "read" : "write",
iopb->cyl, iopb->head, iopb->sect);
printf("%s", xyc_e2str(error));

if (still_trying)
printf(" [still trying, new error=%s]", xyc_e2str(iorq->errnum));
else
if (iorq->errnum == 0)
printf(" [recovered in %d tries]", iorq->tries);

printf("\n");
}

/*
* xyc_error: non-fatal error encountered... recover.
* return AOK if resubmitted, return FAIL if this iopb is done
*/
int
xyc_error(struct xyc_softc *xycsc, struct xy_iorq *iorq, struct xy_iopb *iopb,
int comm)
{
int errnum = iorq->errnum;
int erract = xyc_entoact(errnum);
int oldmode, advance;
#ifdef __sparc__
int i;
#endif

if (erract == XY_ERA_RSET) { /* some errors require a reset */
oldmode = iorq->mode;
iorq->mode = XY_SUB_DONE | (~XY_SUB_MASK & oldmode);
/* make xyc_start ignore us */
xyc_reset(xycsc, 1, XY_RSET_NONE, errnum, iorq->xy);
iorq->mode = oldmode;
}
/* check for read/write to a sector in bad144 table if bad: redirect
* request to bad144 area */

if ((comm == XYCMD_RD || comm == XYCMD_WR) &&
(iorq->mode & XY_MODE_B144) == 0) {
advance = iorq->sectcnt - iopb->scnt;
XYC_ADVANCE(iorq, advance);
#ifdef __sparc__
if ((i = isbad(&iorq->xy->dkb, iorq->blockno / iorq->xy->sectpercyl,
(iorq->blockno / iorq->xy->nsect) % iorq->xy->nhead,
iorq->blockno % iorq->xy->nsect)) != -1) {
iorq->mode |= XY_MODE_B144; /* enter bad144 mode &
* redirect */
iopb->errnum = iopb->done = iopb->errs = 0;
iopb->scnt = 1;
iopb->cyl = (iorq->xy->ncyl + iorq->xy->acyl) - 2;
/* second to last acyl */
i = iorq->xy->sectpercyl - 1 - i; /* follow bad144
* standard */
iopb->head = i / iorq->xy->nhead;
iopb->sect = i % iorq->xy->nhead;
/* will resubmit when we come out of remove_iorq */
return (XY_ERR_AOK); /* recovered! */
}
#endif
}

/*
* it isn't a bad144 sector, must be real error! see if we can retry
* it?
*/
if ((iorq->mode & XY_MODE_VERBO) && iorq->lasterror)
xyc_perror(iorq, iopb, 1); /* inform of error state
* change */
iorq->lasterror = errnum;

if ((erract == XY_ERA_RSET || erract == XY_ERA_HARD)
&& iorq->tries < XYC_MAXTRIES) { /* retry? */
iorq->tries++;
iorq->errnum = iopb->errnum = iopb->done = iopb->errs = 0;
/* will resubmit at end of remove_iorq */
return (XY_ERR_AOK); /* recovered! */
}

/* failed to recover from this error */
return (XY_ERR_FAIL);
}

/*
* xyc_tick: make sure xy is still alive and ticking (err, kicking).
*/
void
xyc_tick(void *arg)
{
struct xyc_softc *xycsc = arg;
int lcv, s, reset = 0;

/* reduce ttl for each request if one goes to zero, reset xyc */
s = splbio();
for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) {
if (xycsc->reqs[lcv].mode == 0 ||
XY_STATE(xycsc->reqs[lcv].mode) == XY_SUB_DONE)
continue;
xycsc->reqs[lcv].ttl--;
if (xycsc->reqs[lcv].ttl == 0)
reset = 1;
}
if (reset) {
printf("%s: watchdog timeout\n", device_xname(xycsc->sc_dev));
xyc_reset(xycsc, 0, XY_RSET_NONE, XY_ERR_FAIL, NULL);
}
splx(s);

/* until next time */

callout_reset(&xycsc->sc_tick_ch, XYC_TICKCNT, xyc_tick, xycsc);
}

/*
* xyc_ioctlcmd: this function provides a user level interface to the
* controller via ioctl. this allows "format" programs to be written
* in user code, and is also useful for some debugging. we return
* an error code. called at user priority.
*
* XXX missing a few commands (see the 7053 driver for ideas)
*/
int
xyc_ioctlcmd(struct xy_softc *xy, dev_t dev, struct xd_iocmd *xio)
{
int s, rqno, dummy = 0;
char *dvmabuf = NULL, *buf = NULL;
struct xyc_softc *xycsc;
int rseg, error;
bus_dma_segment_t seg;

/* check sanity of requested command */

switch (xio->cmd) {

case XYCMD_NOP: /* no op: everything should be zero */
if (xio->subfn || xio->dptr || xio->dlen ||
xio->block || xio->sectcnt)
return (EINVAL);
break;

case XYCMD_RD: /* read / write sectors (up to XD_IOCMD_MAXS) */
case XYCMD_WR:
if (xio->subfn || xio->sectcnt > XD_IOCMD_MAXS ||
xio->sectcnt * XYFM_BPS != xio->dlen || xio->dptr == NULL)
return (EINVAL);
break;

case XYCMD_SK: /* seek: doesn't seem useful to export this */
return (EINVAL);

break;

default:
return (EINVAL);/* ??? */
}

xycsc = xy->parent;

/* create DVMA buffer for request if needed */
if (xio->dlen) {
bus_addr_t busbuf;

if ((error = xy_dmamem_alloc(xycsc->dmatag, xycsc->auxmap,
&seg, &rseg,
xio->dlen, (void **)&buf,
&busbuf)) != 0) {
return (error);
}
dvmabuf = (void *)(u_long)BUS_ADDR_PADDR(busbuf);

if (xio->cmd == XYCMD_WR) {
if ((error = copyin(xio->dptr, buf, xio->dlen)) != 0) {
bus_dmamem_unmap(xycsc->dmatag, buf, xio->dlen);
bus_dmamem_free(xycsc->dmatag, &seg, rseg);
return (error);
}
}
}
/* do it! */

error = 0;
s = splbio();
rqno = xyc_cmd(xycsc, xio->cmd, xio->subfn, xy->xy_drive, xio->block,
xio->sectcnt, dvmabuf, XY_SUB_WAIT);
if (rqno == XY_ERR_FAIL) {
error = EIO;
goto done;
}
xio->errnum = xycsc->ciorq->errnum;
xio->tries = xycsc->ciorq->tries;
XYC_DONE(xycsc, dummy);

if (xio->cmd == XYCMD_RD)
error = copyout(buf, xio->dptr, xio->dlen);

done:
splx(s);
if (dvmabuf) {
xy_dmamem_free(xycsc->dmatag, xycsc->auxmap, &seg, rseg,
xio->dlen, buf);
}
return (error);
}

/*
* xyc_e2str: convert error code number into an error string
*/
const char *
xyc_e2str(int no)
{
switch (no) {
case XY_ERR_FAIL:
return ("Software fatal error");
case XY_ERR_DERR:
return ("DOUBLE ERROR");
case XY_ERR_AOK:
return ("Successful completion");
case XY_ERR_IPEN:
return("Interrupt pending");
case XY_ERR_BCFL:
return("Busy conflict");
case XY_ERR_TIMO:
return("Operation timeout");
case XY_ERR_NHDR:
return("Header not found");
case XY_ERR_HARD:
return("Hard ECC error");
case XY_ERR_ICYL:
return("Illegal cylinder address");
case XY_ERR_ISEC:
return("Illegal sector address");
case XY_ERR_SMAL:
return("Last sector too small");
case XY_ERR_SACK:
return("Slave ACK error (non-existent memory)");
case XY_ERR_CHER:
return("Cylinder and head/header error");
case XY_ERR_SRTR:
return("Auto-seek retry successful");
case XY_ERR_WPRO:
return("Write-protect error");
case XY_ERR_UIMP:
return("Unimplemented command");
case XY_ERR_DNRY:
return("Drive not ready");
case XY_ERR_SZER:
return("Sector count zero");
case XY_ERR_DFLT:
return("Drive faulted");
case XY_ERR_ISSZ:
return("Illegal sector size");
case XY_ERR_SLTA:
return("Self test A");
case XY_ERR_SLTB:
return("Self test B");
case XY_ERR_SLTC:
return("Self test C");
case XY_ERR_SOFT:
return("Soft ECC error");
case XY_ERR_SFOK:
return("Soft ECC error recovered");
case XY_ERR_IHED:
return("Illegal head");
case XY_ERR_DSEQ:
return("Disk sequencer error");
case XY_ERR_SEEK:
return("Seek error");
default:
return ("Unknown error");
}
}

int
xyc_entoact(int errnum)
{
switch (errnum) {
case XY_ERR_FAIL: case XY_ERR_DERR: case XY_ERR_IPEN:
case XY_ERR_BCFL: case XY_ERR_ICYL: case XY_ERR_ISEC:
case XY_ERR_UIMP: case XY_ERR_SZER: case XY_ERR_ISSZ:
case XY_ERR_SLTA: case XY_ERR_SLTB: case XY_ERR_SLTC:
case XY_ERR_IHED: case XY_ERR_SACK: case XY_ERR_SMAL:

return(XY_ERA_PROG); /* program error ! */

case XY_ERR_TIMO: case XY_ERR_NHDR: case XY_ERR_HARD:
case XY_ERR_DNRY: case XY_ERR_CHER: case XY_ERR_SEEK:
case XY_ERR_SOFT:

return(XY_ERA_HARD); /* hard error, retry */

case XY_ERR_DFLT: case XY_ERR_DSEQ:

return(XY_ERA_RSET); /* hard error reset */

case XY_ERR_SRTR: case XY_ERR_SFOK: case XY_ERR_AOK:

return(XY_ERA_SOFT); /* an FYI error */

case XY_ERR_WPRO:

return(XY_ERA_WPRO); /* write protect */
}

return(XY_ERA_PROG); /* ??? */
}