* Copyright (c) 1995 Charles D. Cranor

/* $NetBSD: xd.c,v 1.80 2024/12/21 17:40:11 tsutsui 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 d . c x y l o g i c s 7 5 3 / 7 0 5 3 v m e / s m d d r i v e r
*
* author: Chuck Cranor <chuck@netbsd>
* id: &Id: xd.c,v 1.9 1995/09/25 20:12:44 chuck Exp &
* started: 27-Feb-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
*
* Special thanks go to Scott E. Campbell of Xylogics, Inc. for taking
* the time to answer some of my questions about the 753/7053.
*
* note: the 753 and the 7053 are programmed the same way, but are
* different sizes. the 753 is a 6U VME card, while the 7053 is a 9U
* VME card (found in many VME based suns).
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: xd.c,v 1.80 2024/12/21 17:40:11 tsutsui Exp $");

#undef XDC_DEBUG /* full debug */
#define XDC_DIAG /* extra sanity checks */
#if defined(DIAGNOSTIC) && !defined(XDC_DIAG)
#define XDC_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/kmem.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 <uvm/uvm_extern.h>

#include <machine/autoconf.h>
#include <machine/dvma.h>

#include <dev/sun/disklabel.h>

#include <sun3/dev/xdreg.h>
#include <sun3/dev/xdvar.h>
#include <sun3/dev/xio.h>

#include "ioconf.h"
#include "locators.h"

/*
* Print a complaint when no xd children were specified
* in the config file. Better than a link error...
*
* XXX: Some folks say this driver should be split in two,
* but that seems pointless with ONLY one type of child.
*/
#include "xd.h"
#if NXD == 0
#error "xdc but no xd?"
#endif

/*
* macros
*/

/*
* XDC_TWAIT: add iorq "N" to tail of SC's wait queue
*/
#define XDC_TWAIT(SC, N) \
do { \
(SC)->waitq[(SC)->waitend] = (N); \
(SC)->waitend = ((SC)->waitend + 1) % XDC_MAXIOPB; \
(SC)->nwait++; \
} while (/* CONSTCOND */ 0)

/*
* XDC_HWAIT: add iorq "N" to head of SC's wait queue
*/
#define XDC_HWAIT(SC, N) \
do { \
(SC)->waithead = ((SC)->waithead == 0) ? \
(XDC_MAXIOPB - 1) : ((SC)->waithead - 1); \
(SC)->waitq[(SC)->waithead] = (N); \
(SC)->nwait++; \
} while (/* CONSTCOND */ 0)

/*
* XDC_GET_WAITER: gets the first request waiting on the waitq
* and removes it (so it can be submitted)
*/
#define XDC_GET_WAITER(XDCSC, RQ) \
do { \
(RQ) = (XDCSC)->waitq[(XDCSC)->waithead]; \
(XDCSC)->waithead = ((XDCSC)->waithead + 1) % XDC_MAXIOPB; \
xdcsc->nwait--; \
} while (/* CONSTCOND */ 0)

/*
* XDC_FREE: add iorq "N" to SC's free list
*/
#define XDC_FREE(SC, N) \
do { \
(SC)->freereq[(SC)->nfree++] = (N); \
(SC)->reqs[N].mode = 0; \
if ((SC)->nfree == 1) \
wakeup(&(SC)->nfree); \
} while (/* CONSTCOND */ 0)

/*
* XDC_RQALLOC: allocate an iorq off the free list (assume nfree > 0).
*/
#define XDC_RQALLOC(XDCSC) (XDCSC)->freereq[--((XDCSC)->nfree)]

/*
* XDC_GO: start iopb ADDR (DVMA addr in a u_long) on XDC
*/
#define XDC_GO(XDC, ADDR) \
do { \
(XDC)->xdc_iopbaddr0 = ((ADDR) & 0xff); \
(ADDR) = ((ADDR) >> 8); \
(XDC)->xdc_iopbaddr1 = ((ADDR) & 0xff); \
(ADDR) = ((ADDR) >> 8); \
(XDC)->xdc_iopbaddr2 = ((ADDR) & 0xff); \
(ADDR) = ((ADDR) >> 8); \
(XDC)->xdc_iopbaddr3 = (ADDR); \
(XDC)->xdc_iopbamod = XDC_ADDRMOD; \
(XDC)->xdc_csr = XDC_ADDIOPB; /* go! */ \
} while (/* CONSTCOND */ 0)

/*
* XDC_WAIT: wait for XDC's csr "BITS" to come on in "TIME".
* LCV is a counter. If it goes to zero then we timed out.
*/
#define XDC_WAIT(XDC, LCV, TIME, BITS) \
do { \
(LCV) = (TIME); \
while ((LCV) > 0) { \
if ((XDC)->xdc_csr & (BITS)) \
break; \
(LCV) = (LCV) - 1; \
DELAY(1); \
} \
} while (/* CONSTCOND */ 0)

/*
* XDC_DONE: don't need IORQ, get error code and free (done after xdc_cmd)
*/
#define XDC_DONE(SC,RQ,ER) \
do { \
if ((RQ) == XD_ERR_FAIL) { \
(ER) = (RQ); \
} else { \
if ((SC)->ndone-- == XDC_SUBWAITLIM) \
wakeup(&(SC)->ndone); \
(ER) = (SC)->reqs[RQ].errno; \
XDC_FREE((SC), (RQ)); \
} \
} while (/* CONSTCOND */ 0)

/*
* XDC_ADVANCE: advance iorq's pointers by a number of sectors
*/
#define XDC_ADVANCE(IORQ, N) \
do { \
if (N) { \
(IORQ)->sectcnt -= (N); \
(IORQ)->blockno += (N); \
(IORQ)->dbuf += ((N) * XDFM_BPS); \
} \
} while (/* CONSTCOND */ 0)

/*
* note - addresses you can sleep on:
* [1] & of xd_softc's "state" (waiting for a chance to attach a drive)
* [2] & of xdc_softc's "nfree" (waiting for a free iorq/iopb)
* [3] & of xdc_softc's "ndone" (waiting for number of done iorq/iopb's
* to drop below XDC_SUBWAITLIM)
* [4] & an iorq (waiting for an XD_SUB_WAIT iorq to finish)
*/

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

/* internals */
int xdc_cmd(struct xdc_softc *, int, int, int, int, int, char *, int);
const char *xdc_e2str(int);
int xdc_error(struct xdc_softc *, struct xd_iorq *, struct xd_iopb *, int,
int);
int xdc_ioctlcmd(struct xd_softc *, dev_t dev, struct xd_iocmd *);
void xdc_perror(struct xd_iorq *, struct xd_iopb *, int);
int xdc_piodriver(struct xdc_softc *, int, int);
int xdc_remove_iorq(struct xdc_softc *);
int xdc_reset(struct xdc_softc *, int, int, int, struct xd_softc *);
inline void xdc_rqinit(struct xd_iorq *, struct xdc_softc *, struct xd_softc *,
int, u_long, int, void *, struct buf *);
void xdc_rqtopb(struct xd_iorq *, struct xd_iopb *, int, int);
void xdc_start(struct xdc_softc *, int);
int xdc_startbuf(struct xdc_softc *, struct xd_softc *, struct buf *);
int xdc_submit_iorq(struct xdc_softc *, int, int);
void xdc_tick(void *);
void xdc_xdreset(struct xdc_softc *, struct xd_softc *);

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

/* autoconf */
static int xdcmatch(device_t, cfdata_t, void *);
static void xdcattach(device_t, device_t, void *);
static int xdc_print(void *, const char *);

static int xdmatch(device_t, cfdata_t, void *);
static void xdattach(device_t, device_t, void *);
static void xd_init(struct xd_softc *);

static void xddummystrat(struct buf *);
int xdgetdisklabel(struct xd_softc *, void *);

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

CFATTACH_DECL_NEW(xdc, sizeof(struct xdc_softc),
xdcmatch, xdcattach, NULL, NULL);

CFATTACH_DECL_NEW(xd, sizeof(struct xd_softc),
xdmatch, xdattach, NULL, NULL);

struct xdc_attach_args { /* this is the "aux" args to xdattach */
int driveno; /* unit number */
char *dvmabuf; /* scratch buffer for reading disk label */
int fullmode; /* submit mode */
int booting; /* are we booting or not? */
};

static dev_type_open(xdopen);
static dev_type_close(xdclose);
static dev_type_read(xdread);
static dev_type_write(xdwrite);
static dev_type_ioctl(xdioctl);
static dev_type_strategy(xdstrategy);
static dev_type_dump(xddump);
static dev_type_size(xdsize);

const struct bdevsw xd_bdevsw = {
.d_open = xdopen,
.d_close = xdclose,
.d_strategy = xdstrategy,
.d_ioctl = xdioctl,
.d_dump = xddump,
.d_psize = xdsize,
.d_discard = nodiscard,
.d_flag = D_DISK
};

const struct cdevsw xd_cdevsw = {
.d_open = xdopen,
.d_close = xdclose,
.d_read = xdread,
.d_write = xdwrite,
.d_ioctl = xdioctl,
.d_stop = nostop,
.d_tty = notty,
.d_poll = nopoll,
.d_mmap = nommap,
.d_kqfilter = nokqfilter,
.d_discard = nodiscard,
.d_flag = D_DISK
};

/*
* dkdriver
*/

struct dkdriver xddkdriver = {
.d_strategy = xdstrategy
};

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

static void *xd_labeldata;

static void
xddummystrat(struct buf *bp)
{
if (bp->b_bcount != XDFM_BPS)
panic("%s: b_bcount", __func__);
memcpy(bp->b_data, xd_labeldata, XDFM_BPS);
bp->b_oflags |= BO_DONE;
bp->b_cflags &= ~BC_BUSY;
}

int
xdgetdisklabel(struct xd_softc *xd, void *b)
{
const char *err;
struct sun_disklabel *sdl;

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

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

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

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

xd->ncyl = xd->sc_dk.dk_label->d_ncylinders;
xd->acyl = xd->sc_dk.dk_label->d_acylinders;
xd->nhead = xd->sc_dk.dk_label->d_ntracks;
xd->nsect = xd->sc_dk.dk_label->d_nsectors;
xd->sectpercyl = xd->nhead * xd->nsect;
xd->sc_dk.dk_label->d_secsize = XDFM_BPS; /* not handled by
* sun->bsd */
return XD_ERR_AOK;
}

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

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

/*
* xdcmatch: determine if xdc is present or not. we do a
* soft reset to detect the xdc.
*/

int
xdcmatch(device_t parent, cfdata_t cf, void *aux)
{
struct confargs *ca = aux;

/* No default VME address. */
if (ca->ca_paddr == -1)
return 0;

/* Make sure something is there... */
if (bus_peek(ca->ca_bustype, ca->ca_paddr + 11, 1) == -1)
return 0;

/* Default interrupt priority. */
if (ca->ca_intpri == -1)
ca->ca_intpri = 2;

return 1;
}

/*
* xdcattach: attach controller
*/
void
xdcattach(device_t parent, device_t self, void *aux)
{
struct xdc_softc *xdc = device_private(self);
struct confargs *ca = aux;
struct xdc_attach_args xa;
int lcv, rqno, err;
struct xd_iopb_ctrl *ctl;

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

xdc->sc_dev = self;
xdc->xdc = (struct xdc *)bus_mapin(ca->ca_bustype, ca->ca_paddr,
sizeof(struct xdc));
xdc->bustype = ca->ca_bustype;
xdc->ipl = ca->ca_intpri;
xdc->vector = ca->ca_intvec;

for (lcv = 0; lcv < XDC_MAXDEV; lcv++)
xdc->sc_drives[lcv] = NULL;

/* allocate and zero buffers
*
* note: we simplify the code by allocating the max number of iopbs and
* iorq's up front. thus, we avoid linked lists and the costs
* associated with them in exchange for wasting a little memory. */

xdc->iopbase = (struct xd_iopb *)dvma_malloc(XDC_MAXIOPB *
sizeof(struct xd_iopb)); /* KVA */
memset(xdc->iopbase, 0, XDC_MAXIOPB * sizeof(struct xd_iopb));
xdc->dvmaiopb = (struct xd_iopb *)dvma_kvtopa(xdc->iopbase,
xdc->bustype);
xdc->reqs = kmem_zalloc(XDC_MAXIOPB * sizeof(struct xd_iorq),
KM_SLEEP);

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

for (lcv = 0; lcv < XDC_MAXIOPB; lcv++) {
xdc->reqs[lcv].iopb = &xdc->iopbase[lcv];
xdc->freereq[lcv] = lcv;
xdc->iopbase[lcv].fixd = 1; /* always the same */
xdc->iopbase[lcv].naddrmod = XDC_ADDRMOD; /* always the same */
xdc->iopbase[lcv].intr_vec = xdc->vector; /* always the same */
}
xdc->nfree = XDC_MAXIOPB;
xdc->nrun = 0;
xdc->waithead = xdc->waitend = xdc->nwait = 0;
xdc->ndone = 0;

/* init queue of waiting bufs */

bufq_alloc(&xdc->sc_wq, "fcfs", 0);
callout_init(&xdc->sc_tick_ch, 0);

/*
* section 7 of the manual tells us how to init the controller:
* - read controller parameters (6/0)
* - write controller parameters (5/0)
*/

/* read controller parameters and insure we have a 753/7053 */

rqno = xdc_cmd(xdc, XDCMD_RDP, XDFUN_CTL, 0, 0, 0, 0, XD_SUB_POLL);
if (rqno == XD_ERR_FAIL) {
aprint_error(": couldn't read controller params\n");
return; /* shouldn't ever happen */
}
ctl = (struct xd_iopb_ctrl *)&xdc->iopbase[rqno];
if (ctl->ctype != XDCT_753) {
if (xdc->reqs[rqno].errno)
aprint_error(": %s: ",
xdc_e2str(xdc->reqs[rqno].errno));
aprint_error(": doesn't identify as a 753/7053\n");
XDC_DONE(xdc, rqno, err);
return;
}
aprint_normal(": Xylogics 753/7053, PROM=0x%x.%02x.%02x\n",
ctl->eprom_partno, ctl->eprom_lvl, ctl->eprom_rev);
XDC_DONE(xdc, rqno, err);

/* now write controller parameters (xdc_cmd sets all params for us) */

rqno = xdc_cmd(xdc, XDCMD_WRP, XDFUN_CTL, 0, 0, 0, 0, XD_SUB_POLL);
XDC_DONE(xdc, rqno, err);
if (err) {
aprint_error_dev(self, "controller config error: %s\n",
xdc_e2str(err));
return;
}

/* link in interrupt with higher level software */
isr_add_vectored(xdcintr, xdc, ca->ca_intpri, ca->ca_intvec);
evcnt_attach_dynamic(&xdc->sc_intrcnt, EVCNT_TYPE_INTR, NULL,
device_xname(self), "intr");

/* now we must look for disks using autoconfig */
xa.booting = 1;
for (xa.driveno = 0; xa.driveno < XDC_MAXDEV; xa.driveno++)
(void)config_found(self, (void *)&xa, xdc_print, CFARGS_NONE);

/* start the watchdog clock */
callout_reset(&xdc->sc_tick_ch, XDC_TICKCNT, xdc_tick, xdc);
}

int
xdc_print(void *aux, const char *name)
{
struct xdc_attach_args *xa = aux;

if (name != NULL)
aprint_normal("%s: ", name);

if (xa->driveno != -1)
aprint_normal(" drive %d", xa->driveno);

return UNCONF;
}

/*
* xdmatch: 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 xdattach!). Also, wire down the relationship between the
* xd* and xdc* devices, to simplify boot device identification.
*/
int
xdmatch(device_t parent, cfdata_t cf, void *aux)
{
struct xdc_attach_args *xa = aux;
int xd_unit;

/* Match only on the "wired-down" controller+disk. */
xd_unit = device_unit(parent) * 2 + xa->driveno;
if (cf->cf_unit != xd_unit)
return 0;

return 1;
}

/*
* xdattach: attach a disk.
*/
void
xdattach(device_t parent, device_t self, void *aux)
{
struct xd_softc *xd = device_private(self);
struct xdc_softc *xdc = device_private(parent);
struct xdc_attach_args *xa = aux;

xd->sc_dev = self;
aprint_normal("\n");

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

xd->state = XD_DRIVE_UNKNOWN; /* to start */
xd->flags = 0;
xd->parent = xdc;

xd->xd_drive = xa->driveno;
xdc->sc_drives[xa->driveno] = xd;

/* Do init work common to attach and open. */
xd_init(xd);
}

/*
* end of autoconfig functions
*/

/*
* Initialize a disk. This can be called from both autoconf and
* also from xdopen/xdstrategy.
*/
static void
xd_init(struct xd_softc *xd)
{
struct xdc_softc *xdc;
struct dkbad *dkb;
struct xd_iopb_drive *driopb;
void *dvmabuf;
int rqno, err, spt, mb, blk, lcv, fullmode, newstate;

xdc = xd->parent;
xd->state = XD_DRIVE_ATTACHING;
newstate = XD_DRIVE_UNKNOWN;
fullmode = (cold) ? XD_SUB_POLL : XD_SUB_WAIT;
dvmabuf = dvma_malloc(XDFM_BPS);

/* first try and reset the drive */
rqno = xdc_cmd(xdc, XDCMD_RST, 0, xd->xd_drive, 0, 0, 0, fullmode);
XDC_DONE(xdc, rqno, err);
if (err == XD_ERR_NRDY) {
printf("%s: drive %d: off-line\n",
device_xname(xd->sc_dev), xd->xd_drive);
goto done;
}
if (err) {
printf("%s: ERROR 0x%02x (%s)\n",
device_xname(xd->sc_dev), err, xdc_e2str(err));
goto done;
}
printf("%s: drive %d ready\n",
device_xname(xd->sc_dev), xd->xd_drive);

/* now set format parameters */

rqno = xdc_cmd(xdc, XDCMD_WRP, XDFUN_FMT, xd->xd_drive,
0, 0, 0, fullmode);
XDC_DONE(xdc, rqno, err);
if (err) {
printf("%s: write format parameters failed: %s\n",
device_xname(xd->sc_dev), xdc_e2str(err));
goto done;
}

/* get drive parameters */
spt = 0;
rqno = xdc_cmd(xdc, XDCMD_RDP, XDFUN_DRV, xd->xd_drive,
0, 0, 0, fullmode);
if (rqno != XD_ERR_FAIL) {
driopb = (struct xd_iopb_drive *)&xdc->iopbase[rqno];
spt = driopb->sectpertrk;
}
XDC_DONE(xdc, rqno, err);
if (err) {
printf("%s: read drive parameters failed: %s\n",
device_xname(xd->sc_dev), xdc_e2str(err));
goto done;
}

/*
* now set drive parameters (to semi-bogus values) so we can read the
* disk label.
*/
xd->pcyl = xd->ncyl = 1;
xd->acyl = 0;
xd->nhead = 1;
xd->nsect = 1;
xd->sectpercyl = 1;
for (lcv = 0; lcv < 126; lcv++) /* init empty bad144 table */
xd->dkb.bt_bad[lcv].bt_cyl =
xd->dkb.bt_bad[lcv].bt_trksec = 0xffff;
rqno = xdc_cmd(xdc, XDCMD_WRP, XDFUN_DRV, xd->xd_drive,
0, 0, 0, fullmode);
XDC_DONE(xdc, rqno, err);
if (err) {
printf("%s: write drive parameters failed: %s\n",
device_xname(xd->sc_dev), xdc_e2str(err));
goto done;
}

/* read disk label */
rqno = xdc_cmd(xdc, XDCMD_RD, 0, xd->xd_drive,
0, 1, dvmabuf, fullmode);
XDC_DONE(xdc, rqno, err);
if (err) {
printf("%s: reading disk label failed: %s\n",
device_xname(xd->sc_dev), xdc_e2str(err));
goto done;
}
newstate = XD_DRIVE_NOLABEL;

xd->hw_spt = spt;
/* Attach the disk: must be before getdisklabel to malloc label */
disk_attach(&xd->sc_dk);

if (xdgetdisklabel(xd, dvmabuf) != XD_ERR_AOK)
goto done;

/* inform the user of what is up */
printf("%s: <%s>, pcyl %d, hw_spt %d\n",
device_xname(xd->sc_dev), (char *)dvmabuf, xd->pcyl, spt);
mb = xd->ncyl * (xd->nhead * xd->nsect) / (1048576 / XDFM_BPS);
printf("%s: %dMB, %d cyl, %d head, %d sec\n",
device_xname(xd->sc_dev), mb,
xd->ncyl, xd->nhead, xd->nsect);

/* now set the real drive parameters! */
rqno = xdc_cmd(xdc, XDCMD_WRP, XDFUN_DRV, xd->xd_drive,
0, 0, 0, fullmode);
XDC_DONE(xdc, rqno, err);
if (err) {
printf("%s: write real drive parameters failed: %s\n",
device_xname(xd->sc_dev), xdc_e2str(err));
goto done;
}
newstate = XD_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 = (xd->ncyl + xd->acyl - 1) * (xd->nhead * xd->nsect) + /* last cyl */
(xd->nhead - 1) * xd->nsect; /* last head */
rqno = xdc_cmd(xdc, XDCMD_RD, 0, xd->xd_drive,
blk, 1, dvmabuf, fullmode);
XDC_DONE(xdc, rqno, err);
if (err) {
printf("%s: reading bad144 failed: %s\n",
device_xname(xd->sc_dev), xdc_e2str(err));
goto done;
}

/* check dkbad for sanity */
dkb = (struct dkbad *)dvmabuf;
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 >= xd->ncyl)
break;
if ((dkb->bt_bad[lcv].bt_trksec >> 8) >= xd->nhead)
break;
if ((dkb->bt_bad[lcv].bt_trksec & 0xff) >= xd->nsect)
break;
}
if (lcv != 126) {
printf("%s: warning: invalid bad144 sector!\n",
device_xname(xd->sc_dev));
} else {
memcpy(&xd->dkb, dvmabuf, XDFM_BPS);
}

done:
xd->state = newstate;
dvma_free(dvmabuf, XDFM_BPS);
}

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

/*
* xdclose: close device
*/
static int
xdclose(dev_t dev, int flag, int fmt, struct lwp *l)
{
struct xd_softc *xd = device_lookup_private(&xd_cd, DISKUNIT(dev));
int part = DISKPART(dev);

/* clear mask bits */

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

return 0;
}

/*
* xddump: crash dump system
*/
static int
xddump(dev_t dev, daddr_t blkno, void *va, size_t sz)
{
int unit, part;
struct xd_softc *xd;

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

xd = device_lookup_private(&xd_cd, unit);
if (xd == NULL)
return ENXIO;

printf("%s%c: crash dump not supported (yet)\n",
device_xname(xd->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
xd_getkauthreq(u_char cmd)
{
enum kauth_device_req req;

switch (cmd) {
case XDCMD_WR:
case XDCMD_XWR:
req = KAUTH_REQ_DEVICE_RAWIO_PASSTHRU_WRITE;
break;

case XDCMD_RD:
case XDCMD_XRD:
req = KAUTH_REQ_DEVICE_RAWIO_PASSTHRU_READ;
break;

case XDCMD_RDP:
req = KAUTH_REQ_DEVICE_RAWIO_PASSTHRU_READCONF;
break;

case XDCMD_WRP:
case XDCMD_RST:
req = KAUTH_REQ_DEVICE_RAWIO_PASSTHRU_WRITECONF;
break;

case XDCMD_NOP:
case XDCMD_SK:
case XDCMD_TST:
default:
req = 0;
break;
}

return req;
}

/*
* xdioctl: ioctls on XD drives. based on ioctl's of other netbsd disks.
*/
static int
xdioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l)
{
struct xd_softc *xd;
struct xd_iocmd *xio;
int error, s, unit;

unit = DISKUNIT(dev);

xd = device_lookup_private(&xd_cd, unit);
if (xd == NULL)
return (ENXIO);

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

/* switch on ioctl type */

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

case DIOCSDINFO: /* set disk label */
if ((flag & FWRITE) == 0)
return EBADF;
error = setdisklabel(xd->sc_dk.dk_label,
(struct disklabel *)addr, /* xd->sc_dk.dk_openmask : */ 0,
xd->sc_dk.dk_cpulabel);
if (error == 0) {
if (xd->state == XD_DRIVE_NOLABEL)
xd->state = XD_DRIVE_ONLINE;
}
return error;

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

case DIOCWDINFO: /* write disk label */
if ((flag & FWRITE) == 0)
return EBADF;
error = setdisklabel(xd->sc_dk.dk_label,
(struct disklabel *)addr, /* xd->sc_dk.dk_openmask : */ 0,
xd->sc_dk.dk_cpulabel);
if (error == 0) {
if (xd->state == XD_DRIVE_NOLABEL)
xd->state = XD_DRIVE_ONLINE;

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

case DIOSXDCMD: {
enum kauth_device_req req;

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

default:
return ENOTTY;
}
}

/*
* xdopen: open drive
*/
static int
xdopen(dev_t dev, int flag, int fmt, struct lwp *l)
{
int err, unit, part, s;
struct xd_softc *xd;

/* first, could it be a valid target? */
unit = DISKUNIT(dev);
xd = device_lookup_private(&xd_cd, unit);
if (xd == NULL)
return ENXIO;
part = DISKPART(dev);
err = 0;

/*
* If some other processing is doing init, sleep.
*/
s = splbio();
while (xd->state == XD_DRIVE_ATTACHING) {
if (tsleep(&xd->state, PRIBIO, "xdopen", 0)) {
err = EINTR;
goto done;
}
}
/* Do we need to init the drive? */
if (xd->state == XD_DRIVE_UNKNOWN) {
xd_init(xd);
wakeup(&xd->state);
}
/* Was the init successful? */
if (xd->state == XD_DRIVE_UNKNOWN) {
err = EIO;
goto done;
}

/* check for partition */
if (part != RAW_PART &&
(part >= xd->sc_dk.dk_label->d_npartitions ||
xd->sc_dk.dk_label->d_partitions[part].p_fstype == FS_UNUSED)) {
err = ENXIO;
goto done;
}

/* set open masks */
switch (fmt) {
case S_IFCHR:
xd->sc_dk.dk_copenmask |= (1 << part);
break;
case S_IFBLK:
xd->sc_dk.dk_bopenmask |= (1 << part);
break;
}
xd->sc_dk.dk_openmask = xd->sc_dk.dk_copenmask | xd->sc_dk.dk_bopenmask;

done:
splx(s);
return err;
}

static int
xdread(dev_t dev, struct uio *uio, int flags)
{

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

static int
xdwrite(dev_t dev, struct uio *uio, int flags)
{

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

/*
* xdsize: return size of a partition for a dump
*/
static int
xdsize(dev_t dev)
{
struct xd_softc *xdsc;
int unit, part, size, omask;

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

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

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

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

/*
* xdstrategy: buffering system interface to xd.
*/
static void
xdstrategy(struct buf *bp)
{
struct xd_softc *xd;
struct xdc_softc *parent;
int s, unit;

unit = DISKUNIT(bp->b_dev);

/* check for live device */

xd = device_lookup_private(&xd_cd, unit);
if (xd == NULL ||
bp->b_blkno < 0 ||
(bp->b_bcount % xd->sc_dk.dk_label->d_secsize) != 0) {
bp->b_error = EINVAL;
goto done;
}

/* There should always be an open first. */
if (xd->state == XD_DRIVE_UNKNOWN) {
bp->b_error = EIO;
goto done;
}

if (xd->state != XD_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. */

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

/*
* now we know we have a valid buf structure that we need to do I/O
* on.
*
* note that we don't disksort because the controller has a sorting
* algorithm built into the hardware.
*/

s = splbio(); /* protect the queues */

/* first, give jobs in front of us a chance */
parent = xd->parent;
while (parent->nfree > 0 && bufq_peek(parent->sc_wq) != NULL)
if (xdc_startbuf(parent, NULL, NULL) != XD_ERR_AOK)
break;

/*
* if there are no free iorq's, then we just queue and return. the
* buffs will get picked up later by xdcintr().
*/
if (parent->nfree == 0) {
bufq_put(parent->sc_wq, bp);
splx(s);
return;
}

/* now we have free iopb's and we are at splbio... start 'em up */
if (xdc_startbuf(parent, xd, bp) != XD_ERR_AOK) {
return;
}

/* 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
*
* xdcintr: hardware interrupt.
*/
int
xdcintr(void *v)
{
struct xdc_softc *xdcsc = v;

/* kick the event counter */
xdcsc->sc_intrcnt.ev_count++;

/* remove as many done IOPBs as possible */
xdc_remove_iorq(xdcsc);

/* start any iorq's already waiting */
xdc_start(xdcsc, XDC_MAXIOPB);

/* fill up any remaining iorq's with queue'd buffers */
while (xdcsc->nfree > 0 && bufq_peek(xdcsc->sc_wq) != NULL)
if (xdc_startbuf(xdcsc, NULL, NULL) != XD_ERR_AOK)
break;

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

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

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

inline void
xdc_rqinit(struct xd_iorq *rq, struct xdc_softc *xdc, struct xd_softc *xd,
int md, u_long blk, int cnt, void *db, struct buf *bp)
{

rq->xdc = xdc;
rq->xd = xd;
rq->ttl = XDC_MAXTTL + 10;
rq->mode = md;
rq->tries = rq->errno = rq->lasterror = 0;
rq->blockno = blk;
rq->sectcnt = cnt;
rq->dbuf = rq->dbufbase = db;
rq->buf = bp;
}

/*
* xdc_rqtopb: load up an IOPB based on an iorq
*/
void
xdc_rqtopb(struct xd_iorq *iorq, struct xd_iopb *iopb, int cmd, int subfun)
{
u_long block, dp;

/* standard stuff */

iopb->errs = iopb->done = 0;
iopb->comm = cmd;
iopb->errno = iopb->status = 0;
iopb->subfun = subfun;
if (iorq->xd)
iopb->unit = iorq->xd->xd_drive;
else
iopb->unit = 0;

/* check for alternate IOPB format */

if (cmd == XDCMD_WRP) {
switch (subfun) {
case XDFUN_CTL:{
struct xd_iopb_ctrl *ctrl =
(struct xd_iopb_ctrl *)iopb;
iopb->lll = 0;
iopb->intl = (XD_STATE(iorq->mode) == XD_SUB_POLL)
? 0 : iorq->xdc->ipl;
ctrl->param_a = XDPA_TMOD | XDPA_DACF;
ctrl->param_b = XDPB_ROR | XDPB_TDT_3_2USEC;
ctrl->param_c = XDPC_OVS | XDPC_COP | XDPC_ASR |
XDPC_RBC | XDPC_ECC2;
ctrl->throttle = XDC_THROTTLE;
#ifdef sparc
if (CPU_ISSUN4 && cpuinfo.cpu_type == CPUTYP_4_300)
ctrl->delay = XDC_DELAY_4_300;
else
ctrl->delay = XDC_DELAY_SPARC;
#endif
#ifdef sun3
ctrl->delay = XDC_DELAY_SUN3;
#endif
break;
}
case XDFUN_DRV:{
struct xd_iopb_drive *drv =
(struct xd_iopb_drive *)iopb;
/* we assume that the disk label has the right
* info */
if (XD_STATE(iorq->mode) == XD_SUB_POLL)
drv->dparam_ipl = (XDC_DPARAM << 3);
else
drv->dparam_ipl = (XDC_DPARAM << 3) |
iorq->xdc->ipl;
drv->maxsect = iorq->xd->nsect - 1;
drv->maxsector = drv->maxsect;
/* note: maxsector != maxsect only if you are
* doing cyl sparing */
drv->headoff = 0;
drv->maxcyl = iorq->xd->pcyl - 1;
drv->maxhead = iorq->xd->nhead - 1;
break;
}
case XDFUN_FMT:
{
struct xd_iopb_format *form =
(struct xd_iopb_format *)iopb;

if (XD_STATE(iorq->mode) == XD_SUB_POLL)
form->interleave_ipl = (XDC_INTERLEAVE << 3);
else
form->interleave_ipl = (XDC_INTERLEAVE << 3) |
iorq->xdc->ipl;
form->field1 = XDFM_FIELD1;
form->field2 = XDFM_FIELD2;
form->field3 = XDFM_FIELD3;
form->field4 = XDFM_FIELD4;
form->bytespersec = XDFM_BPS;
form->field6 = XDFM_FIELD6;
form->field7 = XDFM_FIELD7;
break;
}
}
} else {

/* normal IOPB case (harmless to RDP command) */

iopb->lll = 0;
iopb->intl = (XD_STATE(iorq->mode) == XD_SUB_POLL)
? 0 : iorq->xdc->ipl;
iopb->sectcnt = iorq->sectcnt;
block = iorq->blockno;
if (iorq->xd == NULL || block == 0) {
iopb->sectno = iopb->headno = iopb->cylno = 0;
} else {
iopb->sectno = block % iorq->xd->nsect;
block = block / iorq->xd->nsect;
iopb->headno = block % iorq->xd->nhead;
block = block / iorq->xd->nhead;
iopb->cylno = block;
}
iopb->daddr = dp = (iorq->dbuf == NULL) ? 0 :
dvma_kvtopa(iorq->dbuf, iorq->xdc->bustype);
iopb->addrmod = XDC_ADDRMOD;
}
}

/*
* xdc_cmd: front end for POLL'd and WAIT'd commands. Returns rqno.
* If you've already got an IORQ, you can call submit directly (currently
* there is no need to do this). NORM requests are handled separately.
*/
int
xdc_cmd(struct xdc_softc *xdcsc, int cmd, int subfn, int unit, int block,
int scnt, char *dptr, int fullmode)
{
struct xd_iorq *iorq;
struct xd_iopb *iopb;
int rqno, retry;
int submode = XD_STATE(fullmode);

/* get iorq/iopb */
switch (submode) {
case XD_SUB_POLL:
while (xdcsc->nfree == 0) {
if (xdc_piodriver(xdcsc, 0, 1) != XD_ERR_AOK)
return XD_ERR_FAIL;
}
break;
case XD_SUB_WAIT:
retry = 1;
while (retry) {
while (xdcsc->nfree == 0) {
if (tsleep(&xdcsc->nfree, PRIBIO, "xdnfree", 0))
return XD_ERR_FAIL;
}
while (xdcsc->ndone > XDC_SUBWAITLIM) {
if (tsleep(&xdcsc->ndone, PRIBIO, "xdsubwait", 0))
return XD_ERR_FAIL;
}
if (xdcsc->nfree)
retry = 0; /* got it */
}
break;
default:
return XD_ERR_FAIL; /* illegal */
}
if (xdcsc->nfree == 0)
panic("xdcmd nfree");
rqno = XDC_RQALLOC(xdcsc);
iorq = &xdcsc->reqs[rqno];
iopb = iorq->iopb;

/* init iorq/iopb */
xdc_rqinit(iorq, xdcsc,
(unit == XDC_NOUNIT) ? NULL : xdcsc->sc_drives[unit],
fullmode, block, scnt, dptr, NULL);

/* load IOPB from iorq */
xdc_rqtopb(iorq, iopb, cmd, subfn);

/* submit it for processing */
xdc_submit_iorq(xdcsc, rqno, fullmode); /* error code will be in iorq */

return rqno;
}

/*
* xdc_startbuf
* start a buffer running, assumes nfree > 0
*/
int
xdc_startbuf(struct xdc_softc *xdcsc, struct xd_softc *xdsc, struct buf *bp)
{
int rqno, partno;
struct xd_iorq *iorq;
struct xd_iopb *iopb;
u_long block;
void *dbuf;

if (xdcsc->nfree == 0)
panic("xdc_startbuf free");
rqno = XDC_RQALLOC(xdcsc);
iorq = &xdcsc->reqs[rqno];
iopb = iorq->iopb;

/* get buf */

if (bp == NULL) {
bp = bufq_get(xdcsc->sc_wq);
if (bp == NULL)
panic("%s bp", __func__);
xdsc = xdcsc->sc_drives[DISKUNIT(bp->b_dev)];
}
partno = DISKPART(bp->b_dev);
#ifdef XDC_DEBUG
printf("xdc_startbuf: %s%c: %s block %d\n", device_xname(xdsc->sc_dev),
'a' + partno, (bp->b_flags & B_READ) ? "read" : "write", bp->b_blkno);
printf("%s: b_bcount %d, b_data 0x%x\n", __func__,
bp->b_bcount, bp->b_data);
#endif

/*
* load request. we have to calculate the correct block number based
* on partition info.
*
* also, note that there are two kinds of buf structures, those with
* B_PHYS set and those without B_PHYS. if B_PHYS is set, then it is
* a raw I/O (to a cdevsw) and we are doing I/O directly to the users'
* buffer which has already been mapped into DVMA space. (Not on sun3)
* However, if B_PHYS is not set, then the buffer is a normal system
* buffer which does *not* live in DVMA space. In that case we call
* dvma_mapin to map it into DVMA space so we can do the DMA to it.
*
* in cases where we do a dvma_mapin, note that iorq points to the
* buffer as mapped into DVMA space, where as the bp->b_data points
* to its non-DVMA mapping.
*
* XXX - On the sun3, B_PHYS does NOT mean the buffer is mapped
* into dvma space, only that it was remapped into the kernel.
* We ALWAYS have to remap the kernel buf into DVMA space.
* (It is done inexpensively, using whole segments!)
*/

block = bp->b_blkno + ((partno == RAW_PART) ? 0 :
xdsc->sc_dk.dk_label->d_partitions[partno].p_offset);

dbuf = dvma_mapin(bp->b_data, bp->b_bcount, 0);
if (dbuf == NULL) { /* out of DVMA space */
printf("%s: warning: out of DVMA space\n",
device_xname(xdcsc->sc_dev));
XDC_FREE(xdcsc, rqno);
bufq_put(xdcsc->sc_wq, bp);
return XD_ERR_FAIL; /* XXX: need some sort of
* call-back scheme here? */
}

/* init iorq and load iopb from it */

xdc_rqinit(iorq, xdcsc, xdsc, XD_SUB_NORM | XD_MODE_VERBO, block,
bp->b_bcount / XDFM_BPS, dbuf, bp);

xdc_rqtopb(iorq, iopb, (bp->b_flags & B_READ) ? XDCMD_RD : XDCMD_WR, 0);

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

/* now submit [note that xdc_submit_iorq can never fail on NORM reqs] */

xdc_submit_iorq(xdcsc, rqno, XD_SUB_NORM);
return XD_ERR_AOK;
}

/*
* xdc_submit_iorq: submit an iorq for processing. returns XD_ERR_AOK
* if ok. if it fail returns an error code. type is XD_SUB_*.
*
* note: caller frees iorq in all cases except NORM
*
* return value:
* NORM: XD_AOK (req pending), XD_FAIL (couldn't submit request)
* WAIT: XD_AOK (success), <error-code> (failed)
* POLL: <same as WAIT>
* NOQ : <same as NORM>
*
* there are three sources for i/o requests:
* [1] xdstrategy: 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 7053 can only handle
* XDC_MAXIOPB (31) active iopbs at one time. iopbs are allocated in
* DVMA space at boot up time. what happens if we run out of iopb's?
* for i/o type [1], the buffers are queued at the "buff" layer and
* picked up later by the interrupt routine. for case [2] the
* programmed i/o driver is called with a special flag that says
* return when one iopb is free. for case [3] the process can sleep
* on the iorq free list until some iopbs are available.
*/

int
xdc_submit_iorq(struct xdc_softc *xdcsc, int iorqno, int type)
{
u_long iopbaddr;
struct xd_iorq *iorq = &xdcsc->reqs[iorqno];

#ifdef XDC_DEBUG
printf("xdc_submit_iorq(%s, no=%d, type=%d)\n",
device_xname(xdcsc->sc_dev), iorqno, type);
#endif

/* first check and see if controller is busy */
if (xdcsc->xdc->xdc_csr & XDC_ADDING) {
#ifdef XDC_DEBUG
printf("%s: XDC not ready (ADDING)\n", __func__);
#endif
if (type == XD_SUB_NOQ)
return XD_ERR_FAIL; /* failed */
XDC_TWAIT(xdcsc, iorqno); /* put at end of waitq */
switch (type) {
case XD_SUB_NORM:
return XD_ERR_AOK; /* success */
case XD_SUB_WAIT:
while (iorq->iopb->done == 0) {
(void)tsleep(iorq, PRIBIO, "xdciorq", 0);
}
return iorq->errno;
case XD_SUB_POLL:
return xdc_piodriver(xdcsc, iorqno, 0);
default:
panic("%s adding", __func__);
}
}
#ifdef XDC_DEBUG
{
u_char *rio = (u_char *)iorq->iopb;
int sz = sizeof(struct xd_iopb), lcv;
printf("%s: aio #%d [",
device_xname(xdcsc->sc_dev), iorq - xdcsc->reqs);
for (lcv = 0; lcv < sz; lcv++)
printf(" %02x", rio[lcv]);
printf("]\n");
}
#endif /* XDC_DEBUG */

/* controller not busy, start command */
iopbaddr = dvma_kvtopa(iorq->iopb, xdcsc->bustype);
XDC_GO(xdcsc->xdc, iopbaddr); /* go! */
xdcsc->nrun++;
/* command now running, wrap it up */
switch (type) {
case XD_SUB_NORM:
case XD_SUB_NOQ:
return XD_ERR_AOK; /* success */
case XD_SUB_WAIT:
while (iorq->iopb->done == 0) {
(void)tsleep(iorq, PRIBIO, "xdciorq", 0);
}
return iorq->errno;
case XD_SUB_POLL:
return xdc_piodriver(xdcsc, iorqno, 0);
default:
panic("%s wrap up", __func__);
}
panic("%s: impossible", __func__);
return 0; /* not reached */
}

/*
* xdc_piodriver
*
* programmed i/o driver. this function takes over the computer
* and drains off all i/o requests. it returns the status of the iorq
* the caller is interesting in. if freeone is true, then it returns
* when there is a free iorq.
*/
int
xdc_piodriver(struct xdc_softc *xdcsc, int iorqno, int freeone)
{
int nreset = 0;
int retval = 0;
u_long count;
struct xdc *xdc = xdcsc->xdc;
#ifdef XDC_DEBUG
printf("%s(%s, %d, freeone=%d)\n", __func__,
device_xname(xdcsc->sc_dev), iorqno, freeone);
#endif

while (xdcsc->nwait || xdcsc->nrun) {
#ifdef XDC_DEBUG
printf("%s: wait=%d, run=%d\n", __func__,
xdcsc->nwait, xdcsc->nrun);
#endif
XDC_WAIT(xdc, count, XDC_MAXTIME, (XDC_REMIOPB | XDC_F_ERROR));
#ifdef XDC_DEBUG
printf("%s: done wait with count = %d\n", __func__, count);
#endif
/* we expect some progress soon */
if (count == 0 && nreset >= 2) {
xdc_reset(xdcsc, 0, XD_RSET_ALL, XD_ERR_FAIL, 0);
#ifdef XDC_DEBUG
printf("%s: timeout\n", __func__);
#endif
return XD_ERR_FAIL;
}
if (count == 0) {
if (xdc_reset(xdcsc, 0,
(nreset++ == 0) ? XD_RSET_NONE : iorqno,
XD_ERR_FAIL, 0) == XD_ERR_FAIL)
return XD_ERR_FAIL; /* flushes all but POLL
* requests, resets */
continue;
}
xdc_remove_iorq(xdcsc); /* could resubmit request */
if (freeone) {
if (xdcsc->nrun < XDC_MAXIOPB) {
#ifdef XDC_DEBUG
printf("%s: done: one free\n", __func__);
#endif
return XD_ERR_AOK;
}
continue; /* don't xdc_start */
}
xdc_start(xdcsc, XDC_MAXIOPB);
}

/* get return value */

retval = xdcsc->reqs[iorqno].errno;

#ifdef XDC_DEBUG
printf("%s: done, retval = 0x%x (%s)\n", __func__,
xdcsc->reqs[iorqno].errno, xdc_e2str(xdcsc->reqs[iorqno].errno));
#endif

/*
* now that we've drained everything, start up any bufs that have
* queued
*/

while (xdcsc->nfree > 0 && bufq_peek(xdcsc->sc_wq) != NULL)
if (xdc_startbuf(xdcsc, NULL, NULL) != XD_ERR_AOK)
break;

return retval;
}

/*
* xdc_reset: reset one drive. NOTE: assumes xdc was just reset.
* we steal iopb[0] for this, but we put it back when we are done.
*/
void
xdc_xdreset(struct xdc_softc *xdcsc, struct xd_softc *xdsc)
{
struct xd_iopb tmpiopb;
u_long addr;
int del;

memcpy(&tmpiopb, xdcsc->iopbase, sizeof(tmpiopb));
memset(xdcsc->iopbase, 0, sizeof(tmpiopb));
xdcsc->iopbase->comm = XDCMD_RST;
xdcsc->iopbase->unit = xdsc->xd_drive;
addr = (u_long)xdcsc->dvmaiopb;
XDC_GO(xdcsc->xdc, addr); /* go! */
XDC_WAIT(xdcsc->xdc, del, XDC_RESETUSEC, XDC_REMIOPB);
if (del <= 0 || xdcsc->iopbase->errs) {
printf("%s: off-line: %s\n", device_xname(xdcsc->sc_dev),
xdc_e2str(xdcsc->iopbase->errno));
xdcsc->xdc->xdc_csr = XDC_RESET;
XDC_WAIT(xdcsc->xdc, del, XDC_RESETUSEC, XDC_RESET);
if (del <= 0)
panic("%s", __func__);
} else {
xdcsc->xdc->xdc_csr = XDC_CLRRIO; /* clear RIO */
}
memcpy(xdcsc->iopbase, &tmpiopb, sizeof(tmpiopb));
}

/*
* xdc_reset: reset everything: requests are marked as errors except
* a polled request (which is resubmitted)
*/
int
xdc_reset(struct xdc_softc *xdcsc, int quiet, int blastmode, int error,
struct xd_softc *xdsc)
{
int del = 0, lcv, retval = XD_ERR_AOK;
int oldfree = xdcsc->nfree;
struct xd_iorq *iorq;

/* soft reset hardware */

if (quiet == 0)
printf("%s: soft reset\n", device_xname(xdcsc->sc_dev));
xdcsc->xdc->xdc_csr = XDC_RESET;
XDC_WAIT(xdcsc->xdc, del, XDC_RESETUSEC, XDC_RESET);
if (del <= 0) {
blastmode = XD_RSET_ALL; /* dead, flush all requests */
retval = XD_ERR_FAIL;
}
if (xdsc)
xdc_xdreset(xdcsc, xdsc);

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

for (lcv = 0; lcv < XDC_MAXIOPB; lcv++) {
iorq = &xdcsc->reqs[lcv];

if (XD_STATE(iorq->mode) != XD_SUB_POLL &&
XD_STATE(iorq->mode) != XD_SUB_WAIT &&
XD_STATE(iorq->mode) != XD_SUB_NORM)
/* is it active? */
continue;

xdcsc->nrun--; /* it isn't running any more */
if (blastmode == XD_RSET_ALL || blastmode != lcv) {
/* failed */
iorq->errno = error;
xdcsc->iopbase[lcv].done = xdcsc->iopbase[lcv].errs = 1;
switch (XD_STATE(iorq->mode)) {
case XD_SUB_NORM:
iorq->buf->b_error = EIO;
iorq->buf->b_resid = iorq->sectcnt * XDFM_BPS;
/* Sun3: map/unmap regardless of B_PHYS */
dvma_mapout(iorq->dbufbase,
iorq->buf->b_bcount);
disk_unbusy(&iorq->xd->sc_dk,
(iorq->buf->b_bcount - iorq->buf->b_resid),
(iorq->buf->b_flags & B_READ));
biodone(iorq->buf);
XDC_FREE(xdcsc, lcv); /* add to free list */
break;
case XD_SUB_WAIT:
wakeup(iorq);
case XD_SUB_POLL:
xdcsc->ndone++;
iorq->mode =
XD_NEWSTATE(iorq->mode, XD_SUB_DONE);
break;
}

} else {

/* resubmit, put at front of wait queue */
XDC_HWAIT(xdcsc, lcv);
}
}

/*
* now, if stuff is waiting, start it.
* since we just reset it should go
*/
xdc_start(xdcsc, XDC_MAXIOPB);

/* ok, we did it */
if (oldfree == 0 && xdcsc->nfree)
wakeup(&xdcsc->nfree);

#ifdef XDC_DIAG
del = xdcsc->nwait + xdcsc->nrun + xdcsc->nfree + xdcsc->ndone;
if (del != XDC_MAXIOPB)
printf("%s: diag: xdc_reset miscount (%d should be %d)!\n",
device_xname(xdcsc->sc_dev), del, XDC_MAXIOPB);
else
if (xdcsc->ndone > XDC_MAXIOPB - XDC_SUBWAITLIM)
printf("%s: diag: lots of done jobs (%d)\n",
device_xname(xdcsc->sc_dev), xdcsc->ndone);
#endif
printf("RESET DONE\n");
return retval;
}

/*
* xdc_start: start all waiting buffers
*/
void
xdc_start(struct xdc_softc *xdcsc, int maxio)
{
int rqno;
while (maxio && xdcsc->nwait &&
(xdcsc->xdc->xdc_csr & XDC_ADDING) == 0) {
XDC_GET_WAITER(xdcsc, rqno); /* note: rqno is an "out"
* param */
if (xdc_submit_iorq(xdcsc, rqno, XD_SUB_NOQ) != XD_ERR_AOK)
panic("%s", __func__); /* should never happen */
maxio--;
}
}

/*
* xdc_remove_iorq: remove "done" IOPB's.
*/
int
xdc_remove_iorq(struct xdc_softc *xdcsc)
{
int errno, rqno, comm, errs;
struct xdc *xdc = xdcsc->xdc;
struct xd_iopb *iopb;
struct xd_iorq *iorq;
struct buf *bp;

if (xdc->xdc_csr & XDC_F_ERROR) {
/*
* FATAL 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.
*/
errno = xdc->xdc_f_err;
printf("%s: fatal error 0x%02x: %s\n",
device_xname(xdcsc->sc_dev), errno, xdc_e2str(errno));
if (xdc_reset(xdcsc, 0, XD_RSET_ALL, errno, 0) != XD_ERR_AOK) {
printf("%s: soft reset failed!\n",
device_xname(xdcsc->sc_dev));
panic("%s: controller DEAD", __func__);
}
return XD_ERR_AOK;
}

/*
* get iopb that is done
*
* hmm... I used to read the address of the done IOPB off the VME
* registers and calculate the rqno directly from that. that worked
* until I started putting a load on the controller. when loaded, i
* would get interrupts but neither the REMIOPB or F_ERROR bits would
* be set, even after DELAY'ing a while! later on the timeout
* routine would detect IOPBs that were marked "running" but their
* "done" bit was set. rather than dealing directly with this
* problem, it is just easier to look at all running IOPB's for the
* done bit.
*/
if (xdc->xdc_csr & XDC_REMIOPB) {
xdc->xdc_csr = XDC_CLRRIO;
}

for (rqno = 0; rqno < XDC_MAXIOPB; rqno++) {
iorq = &xdcsc->reqs[rqno];
if (iorq->mode == 0 || XD_STATE(iorq->mode) == XD_SUB_DONE)
continue; /* free, or done */
iopb = &xdcsc->iopbase[rqno];
if (iopb->done == 0)
continue; /* not done yet */

#ifdef XDC_DEBUG
{
u_char *rio = (u_char *)iopb;
int sz = sizeof(struct xd_iopb), lcv;

printf("%s: rio #%d [",
device_xname(xdcsc->sc_dev), rqno);
for (lcv = 0; lcv < sz; lcv++)
printf(" %02x", rio[lcv]);
printf("]\n");
}
#endif /* XDC_DEBUG */

xdcsc->nrun--;

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

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

/* handle non-fatal errors */

if (errs &&
xdc_error(xdcsc, iorq, iopb, rqno, comm) == XD_ERR_AOK)
continue; /* AOK: we resubmitted it */

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

if ((iorq->mode & XD_MODE_VERBO) && iorq->lasterror)
xdc_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 & XD_MODE_B144) != 0 && errs == 0 &&
(comm == XDCMD_RD || comm == XDCMD_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
*
*/
XDC_ADVANCE(iorq, 1); /* advance 1 sector */

/* exit b144 mode */
iorq->mode = iorq->mode & (~XD_MODE_B144);

if (iorq->sectcnt) { /* more to go! */
iorq->lasterror = iorq->errno = iopb->errno = 0;
iopb->errs = iopb->done = 0;
iorq->tries = 0;
iopb->sectcnt = iorq->sectcnt;
iopb->cylno =
iorq->blockno / iorq->xd->sectpercyl;
iopb->headno =
(iorq->blockno / iorq->xd->nhead) %
iorq->xd->nhead;
iopb->sectno = iorq->blockno % XDFM_BPS;
iopb->daddr =
dvma_kvtopa(iorq->dbuf, xdcsc->bustype);
XDC_HWAIT(xdcsc, rqno);
xdc_start(xdcsc, 1); /* resubmit */
continue;
}
}
/* final cleanup, totally done with this request */

switch (XD_STATE(iorq->mode)) {
case XD_SUB_NORM:
bp = iorq->buf;
if (errs) {
bp->b_error = EIO;
bp->b_resid = iorq->sectcnt * XDFM_BPS;
} else {
bp->b_resid = 0; /* done */
}
/* Sun3: map/unmap regardless of B_PHYS */
dvma_mapout(iorq->dbufbase, iorq->buf->b_bcount);
disk_unbusy(&iorq->xd->sc_dk,
(bp->b_bcount - bp->b_resid),
(bp->b_flags & B_READ));
XDC_FREE(xdcsc, rqno);
biodone(bp);
break;
case XD_SUB_WAIT:
iorq->mode = XD_NEWSTATE(iorq->mode, XD_SUB_DONE);
xdcsc->ndone++;
wakeup(iorq);
break;
case XD_SUB_POLL:
iorq->mode = XD_NEWSTATE(iorq->mode, XD_SUB_DONE);
xdcsc->ndone++;
break;
}
}

return XD_ERR_AOK;
}

/*
* xdc_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 errno is the new one.
* - if still_trying is not true, then if we ever had an error it
* is in lasterror. also, if iorq->errno == 0, then we recovered
* from that error (otherwise iorq->errno == iorq->lasterror).
*/
void
xdc_perror(struct xd_iorq *iorq, struct xd_iopb *iopb, int still_trying)
{
int error = iorq->lasterror;

printf("%s", (iorq->xd) ?
device_xname(iorq->xd->sc_dev) :
device_xname(iorq->xdc->sc_dev));
if (iorq->buf)
printf("%c: ", 'a' + (char)DISKPART(iorq->buf->b_dev));
if (iopb->comm == XDCMD_RD || iopb->comm == XDCMD_WR)
printf("%s %d/%d/%d: ",
(iopb->comm == XDCMD_RD) ? "read" : "write",
iopb->cylno, iopb->headno, iopb->sectno);
printf("%s", xdc_e2str(error));

if (still_trying)
printf(" [still trying, new error=%s]", xdc_e2str(iorq->errno));
else
if (iorq->errno == 0)
printf(" [recovered in %d tries]", iorq->tries);

printf("\n");
}

/*
* xdc_error: non-fatal error encountered... recover.
* return AOK if resubmitted, return FAIL if this iopb is done
*/
int
xdc_error(struct xdc_softc *xdcsc, struct xd_iorq *iorq, struct xd_iopb *iopb,
int rqno, int comm)

{
int errno = iorq->errno;
int erract = errno & XD_ERA_MASK;
int oldmode, advance, i;

if (erract == XD_ERA_RSET) { /* some errors require a reset */
oldmode = iorq->mode;
iorq->mode = XD_SUB_DONE | (~XD_SUB_MASK & oldmode);
xdcsc->ndone++;
/* make xdc_start ignore us */
xdc_reset(xdcsc, 1, XD_RSET_NONE, errno, iorq->xd);
iorq->mode = oldmode;
xdcsc->ndone--;
}
/* check for read/write to a sector in bad144 table if bad: redirect
* request to bad144 area */

if ((comm == XDCMD_RD || comm == XDCMD_WR) &&
(iorq->mode & XD_MODE_B144) == 0) {
advance = iorq->sectcnt - iopb->sectcnt;
XDC_ADVANCE(iorq, advance);
if ((i = isbad(&iorq->xd->dkb,
iorq->blockno / iorq->xd->sectpercyl,
(iorq->blockno / iorq->xd->nsect) % iorq->xd->nhead,
iorq->blockno % iorq->xd->nsect)) != -1) {
iorq->mode |= XD_MODE_B144; /* enter bad144 mode &
* redirect */
iopb->errno = iopb->done = iopb->errs = 0;
iopb->sectcnt = 1;
iopb->cylno = (iorq->xd->ncyl + iorq->xd->acyl) - 2;
/* second to last acyl */
i = iorq->xd->sectpercyl - 1 - i; /* follow bad144
* standard */
iopb->headno = i / iorq->xd->nhead;
iopb->sectno = i % iorq->xd->nhead;
XDC_HWAIT(xdcsc, rqno);
xdc_start(xdcsc, 1); /* resubmit */
return XD_ERR_AOK; /* recovered! */
}
}

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

if ((erract == XD_ERA_RSET || erract == XD_ERA_HARD)
&& iorq->tries < XDC_MAXTRIES) { /* retry? */
iorq->tries++;
iorq->errno = iopb->errno = iopb->done = iopb->errs = 0;
XDC_HWAIT(xdcsc, rqno);
xdc_start(xdcsc, 1); /* restart */
return XD_ERR_AOK; /* recovered! */
}

/* failed to recover from this error */
return XD_ERR_FAIL;
}

/*
* xdc_tick: make sure xd is still alive and ticking (err, kicking).
*/
void
xdc_tick(void *arg)
{
struct xdc_softc *xdcsc = arg;
int lcv, s, reset = 0;
#ifdef XDC_DIAG
int nwait, nrun, nfree, ndone, whd = 0;
uint8_t fqc[XDC_MAXIOPB], wqc[XDC_MAXIOPB], mark[XDC_MAXIOPB];
s = splbio();
nwait = xdcsc->nwait;
nrun = xdcsc->nrun;
nfree = xdcsc->nfree;
ndone = xdcsc->ndone;
memcpy(wqc, xdcsc->waitq, sizeof(wqc));
memcpy(fqc, xdcsc->freereq, sizeof(fqc));
splx(s);
if (nwait + nrun + nfree + ndone != XDC_MAXIOPB) {
printf("%s: diag: IOPB miscount "
"(got w/f/r/d %d/%d/%d/%d, wanted %d)\n",
device_xname(xdcsc->sc_dev), nwait, nfree, nrun, ndone,
XDC_MAXIOPB);
memset(mark, 0, sizeof(mark));
printf("FREE: ");
for (lcv = nfree; lcv > 0; lcv--) {
printf("%d ", fqc[lcv - 1]);
mark[fqc[lcv - 1]] = 1;
}
printf("\nWAIT: ");
lcv = nwait;
while (lcv > 0) {
printf("%d ", wqc[whd]);
mark[wqc[whd]] = 1;
whd = (whd + 1) % XDC_MAXIOPB;
lcv--;
}
printf("\n");
for (lcv = 0; lcv < XDC_MAXIOPB; lcv++) {
if (mark[lcv] == 0) {
printf("MARK: running %d: mode %d done %d "
"errs %d errno 0x%x ttl %d buf %p\n",
lcv, xdcsc->reqs[lcv].mode,
xdcsc->iopbase[lcv].done,
xdcsc->iopbase[lcv].errs,
xdcsc->iopbase[lcv].errno,
xdcsc->reqs[lcv].ttl,
xdcsc->reqs[lcv].buf);
}
}
} else
if (ndone > XDC_MAXIOPB - XDC_SUBWAITLIM)
printf("%s: diag: lots of done jobs (%d)\n",
device_xname(xdcsc->sc_dev), ndone);

#endif
#ifdef XDC_DEBUG
printf("%s: tick: csr 0x%x, w/f/r/d %d/%d/%d/%d\n",
device_xname(xdcsc->sc_dev),
xdcsc->xdc->xdc_csr, xdcsc->nwait, xdcsc->nfree, xdcsc->nrun,
xdcsc->ndone);
for (lcv = 0; lcv < XDC_MAXIOPB; lcv++) {
if (xdcsc->reqs[lcv].mode) {
printf("running %d: "
"mode %d done %d errs %d errno 0x%x\n", lcv,
xdcsc->reqs[lcv].mode, xdcsc->iopbase[lcv].done,
xdcsc->iopbase[lcv].errs,
xdcsc->iopbase[lcv].errno);
}
}
#endif

/* reduce ttl for each request if one goes to zero, reset xdc */
s = splbio();
for (lcv = 0; lcv < XDC_MAXIOPB; lcv++) {
if (xdcsc->reqs[lcv].mode == 0 ||
XD_STATE(xdcsc->reqs[lcv].mode) == XD_SUB_DONE)
continue;
xdcsc->reqs[lcv].ttl--;
if (xdcsc->reqs[lcv].ttl == 0)
reset = 1;
}
if (reset) {
printf("%s: watchdog timeout\n", device_xname(xdcsc->sc_dev));
xdc_reset(xdcsc, 0, XD_RSET_NONE, XD_ERR_FAIL, NULL);
}
splx(s);

/* until next time */

callout_reset(&xdcsc->sc_tick_ch, XDC_TICKCNT, xdc_tick, xdcsc);
}

/*
* xdc_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.
*/
int
xdc_ioctlcmd(struct xd_softc *xd, dev_t dev, struct xd_iocmd *xio)
{
int s, err, rqno;
void *dvmabuf = NULL;
struct xdc_softc *xdcsc;

/* check sanity of requested command */

switch (xio->cmd) {

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

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

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

case XDCMD_WRP: /* write parameters */
return EINVAL; /* not useful, except maybe drive
* parameters... but drive parameters should
* go via disklabel changes */

case XDCMD_RDP: /* read parameters */
if (xio->subfn != XDFUN_DRV ||
xio->dlen || xio->block || xio->dptr)
return EINVAL; /* allow read drive params to
* get hw_spt */
xio->sectcnt = xd->hw_spt; /* we already know the answer */
return 0;
break;

case XDCMD_XRD: /* extended read/write */
case XDCMD_XWR:

switch (xio->subfn) {

case XDFUN_THD:/* track headers */
if (xio->sectcnt != xd->hw_spt ||
(xio->block % xd->nsect) != 0 ||
xio->dlen != XD_IOCMD_HSZ * xd->hw_spt ||
xio->dptr == NULL)
return EINVAL;
xio->sectcnt = 0;
break;

case XDFUN_FMT:/* NOTE: also XDFUN_VFY */
if (xio->cmd == XDCMD_XRD)
return EINVAL; /* no XDFUN_VFY */
if (xio->sectcnt || xio->dlen ||
(xio->block % xd->nsect) != 0 || xio->dptr)
return EINVAL;
break;

case XDFUN_HDR:/* header, header verify, data, data ECC */
return EINVAL; /* not yet */

case XDFUN_DM: /* defect map */
case XDFUN_DMX:/* defect map (alternate location) */
if (xio->sectcnt || xio->dlen != XD_IOCMD_DMSZ ||
(xio->block % xd->nsect) != 0 || xio->dptr == NULL)
return EINVAL;
break;

default:
return EINVAL;
}
break;

case XDCMD_TST: /* diagnostics */
return EINVAL;

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

/* create DVMA buffer for request if needed */

if (xio->dlen) {
dvmabuf = dvma_malloc(xio->dlen);
if (xio->cmd == XDCMD_WR || xio->cmd == XDCMD_XWR) {
err = copyin(xio->dptr, dvmabuf, xio->dlen);
if (err) {
dvma_free(dvmabuf, xio->dlen);
return err;
}
}
}
/* do it! */

err = 0;
xdcsc = xd->parent;
s = splbio();
rqno = xdc_cmd(xdcsc, xio->cmd, xio->subfn, xd->xd_drive, xio->block,
xio->sectcnt, dvmabuf, XD_SUB_WAIT);
if (rqno == XD_ERR_FAIL) {
err = EIO;
goto done;
}
xio->errno = xdcsc->reqs[rqno].errno;
xio->tries = xdcsc->reqs[rqno].tries;
XDC_DONE(xdcsc, rqno, err);

if (xio->cmd == XDCMD_RD || xio->cmd == XDCMD_XRD)
err = copyout(dvmabuf, xio->dptr, xio->dlen);

done:
splx(s);
if (dvmabuf)
dvma_free(dvmabuf, xio->dlen);
return err;
}

/*
* xdc_e2str: convert error code number into an error string
*/
const char *
xdc_e2str(int no)
{

switch (no) {
case XD_ERR_FAIL:
return "Software fatal error";
case XD_ERR_AOK:
return "Successful completion";
case XD_ERR_ICYL:
return "Illegal cylinder address";
case XD_ERR_IHD:
return "Illegal head address";
case XD_ERR_ISEC:
return "Illgal sector address";
case XD_ERR_CZER:
return "Count zero";
case XD_ERR_UIMP:
return "Unimplemented command";
case XD_ERR_IF1:
return "Illegal field length 1";
case XD_ERR_IF2:
return "Illegal field length 2";
case XD_ERR_IF3:
return "Illegal field length 3";
case XD_ERR_IF4:
return "Illegal field length 4";
case XD_ERR_IF5:
return "Illegal field length 5";
case XD_ERR_IF6:
return "Illegal field length 6";
case XD_ERR_IF7:
return "Illegal field length 7";
case XD_ERR_ISG:
return "Illegal scatter/gather length";
case XD_ERR_ISPT:
return "Not enough sectors per track";
case XD_ERR_ALGN:
return "Next IOPB address alignment error";
case XD_ERR_SGAL:
return "Scatter/gather address alignment error";
case XD_ERR_SGEC:
return "Scatter/gather with auto-ECC";
case XD_ERR_SECC:
return "Soft ECC corrected";
case XD_ERR_SIGN:
return "ECC ignored";
case XD_ERR_ASEK:
return "Auto-seek retry recovered";
case XD_ERR_RTRY:
return "Soft retry recovered";
case XD_ERR_HECC:
return "Hard data ECC";
case XD_ERR_NHDR:
return "Header not found";
case XD_ERR_NRDY:
return "Drive not ready";
case XD_ERR_TOUT:
return "Operation timeout";
case XD_ERR_VTIM:
return "VMEDMA timeout";
case XD_ERR_DSEQ:
return "Disk sequencer error";
case XD_ERR_HDEC:
return "Header ECC error";
case XD_ERR_RVFY:
return "Read verify";
case XD_ERR_VFER:
return "Fatail VMEDMA error";
case XD_ERR_VBUS:
return "VMEbus error";
case XD_ERR_DFLT:
return "Drive faulted";
case XD_ERR_HECY:
return "Header error/cylinder";
case XD_ERR_HEHD:
return "Header error/head";
case XD_ERR_NOCY:
return "Drive not on-cylinder";
case XD_ERR_SEEK:
return "Seek error";
case XD_ERR_ILSS:
return "Illegal sector size";
case XD_ERR_SEC:
return "Soft ECC";
case XD_ERR_WPER:
return "Write-protect error";
case XD_ERR_IRAM:
return "IRAM self test failure";
case XD_ERR_MT3:
return "Maintenance test 3 failure (DSKCEL RAM)";
case XD_ERR_MT4:
return "Maintenance test 4 failure (header shift reg)";
case XD_ERR_MT5:
return "Maintenance test 5 failure (VMEDMA regs)";
case XD_ERR_MT6:
return "Maintenance test 6 failure (REGCEL chip)";
case XD_ERR_MT7:
return "Maintenance test 7 failure (buffer parity)";
case XD_ERR_MT8:
return "Maintenance test 8 failure (disk FIFO)";
case XD_ERR_IOCK:
return "IOPB checksum miscompare";
case XD_ERR_IODM:
return "IOPB DMA fatal";
case XD_ERR_IOAL:
return "IOPB address alignment error";
case XD_ERR_FIRM:
return "Firmware error";
case XD_ERR_MMOD:
return "Illegal maintenance mode test number";
case XD_ERR_ACFL:
return "ACFAIL asserted";
default:
return "Unknown error";
}
}