/* $NetBSD: xy.c,v 1.84 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 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>
* id: &Id: xy.c,v 1.1 1995/09/25 20:35:14 chuck Exp &
* 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 1.84 2024/12/21 17:40:11 tsutsui 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/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 <dev/sun/disklabel.h>
#include <machine/autoconf.h>
#include <machine/dvma.h>
#include <sun3/dev/xyreg.h>
#include <sun3/dev/xyvar.h>
#include <sun3/dev/xio.h>
#include "ioconf.h"
#include "locators.h"
/*
* Print a complaint when no xy 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 "xy.h"
#if NXY == 0
#error "xyc but no xy?"
#endif
/*
* macros
*/
/*
* XYC_GO: start iopb ADDR (DVMA addr in a u_long) on XYC
*/
#define XYC_GO(XYC, ADDR) \
do { \
(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! */ \
} while (/* CONSTCOND */ 0)
/*
* XYC_DONE: don't need IORQ, get error code and free (done after xyc_cmd)
*/
#define XYC_DONE(SC,ER) \
do { \
if ((ER) == XY_ERR_AOK) { \
(ER) = (SC)->ciorq->errno; \
(SC)->ciorq->mode = XY_SUB_FREE; \
wakeup((SC)->ciorq); \
} \
} while (/* CONSTCOND */ 0)
/*
* XYC_ADVANCE: advance iorq's pointers by a number of sectors
*/
#define XYC_ADVANCE(IORQ, N) \
do { \
if (N) { \
(IORQ)->sectcnt -= (N); \
(IORQ)->blockno += (N); \
(IORQ)->dbuf += ((N) * XYFM_BPS); \
} \
} while (/* CONSTCOND */ 0)
/*
* 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
*/
/* 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 *);
/* machine interrupt hook */
int xycintr(void *);
/* autoconf */
static int xycmatch(device_t, cfdata_t, void *);
static void xycattach(device_t, device_t, void *);
static int xyc_print(void *, const char *);
static int xymatch(device_t, cfdata_t, void *);
static void xyattach(device_t, device_t, void *);
static void xy_init(struct xy_softc *);
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);
struct xyc_attach_args { /* this is the "aux" args to xyattach */
int driveno; /* unit number */
};
static dev_type_open(xyopen);
static dev_type_close(xyclose);
static dev_type_read(xyread);
static dev_type_write(xywrite);
static dev_type_ioctl(xyioctl);
static dev_type_strategy(xystrategy);
static dev_type_dump(xydump);
static 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
};
/*
* 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("%s: b_bcount", __func__);
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;
struct sun_disklabel *sdl;
/* 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;
}
/* 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_pcyl;
else {
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)
*/
/*
* 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.
*/
static int
xycmatch(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 + 5, 1) == -1)
return 0;
/* Default interrupt priority. */
if (ca->ca_intpri == -1)
ca->ca_intpri = 2;
return 1;
}
/*
* xycattach: attach controller
*/
static void
xycattach(device_t parent, device_t self, void *aux)
{
struct xyc_softc *xyc = device_private(self);
struct confargs *ca = aux;
struct xyc_attach_args xa;
int lcv, err, res, pbsz;
void *tmp, *tmp2;
u_long ultmp;
/* get addressing and intr level stuff from autoconfig and load it
* into our xyc_softc. */
xyc->sc_dev = self;
xyc->xyc = (struct xyc *)bus_mapin(ca->ca_bustype, ca->ca_paddr,
sizeof(struct xyc));
xyc->bustype = ca->ca_bustype;
xyc->ipl = ca->ca_intpri;
xyc->vector = ca->ca_intvec;
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.
*/
pbsz = XYC_MAXIOPB * sizeof(struct xy_iopb);
tmp = tmp2 = (struct xy_iopb *)dvma_malloc(pbsz); /* KVA */
ultmp = (u_long)tmp;
if ((ultmp & 0xffff0000) != ((ultmp + pbsz) & 0xffff0000)) {
tmp = (struct xy_iopb *)dvma_malloc(pbsz); /* retry! */
dvma_free(tmp2, pbsz);
ultmp = (u_long) tmp;
if ((ultmp & 0xffff0000) != ((ultmp + pbsz) & 0xffff0000)) {
aprint_error(": can't alloc IOPB mem in 64K\n");
return;
}
}
memset(tmp, 0, pbsz);
xyc->iopbase = tmp;
xyc->dvmaiopb =
(struct xy_iopb *)dvma_kvtopa(xyc->iopbase, xyc->bustype);
xyc->reqs = kmem_zalloc(XYC_MAXIOPB * sizeof(struct xy_iorq),
KM_SLEEP);
/*
* 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->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 */
}
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 */
err = xyc_cmd(xyc, XYCMD_ST, 0, 0, 0, 0, 0, XY_SUB_POLL);
res = xyc->ciopb->ctyp;
XYC_DONE(xyc, err);
if (res != XYCT_450) {
if (err)
aprint_error(": %s: ", xyc_e2str(err));
aprint_error(": doesn't identify as a 450/451\n");
return;
}
aprint_normal(": Xylogics 450/451");
if (xyc->no_ols)
/* 450 doesn't overlap seek right */
aprint_normal(" [OLS disabled]");
aprint_normal("\n");
if (err) {
aprint_error_dev(self, "error: %s\n", xyc_e2str(err));
return;
}
if ((xyc->xyc->xyc_csr & XYC_ADRM) == 0) {
aprint_error_dev(self, "24 bit addressing turned off\n");
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 */
isr_add_vectored(xycintr, xyc, ca->ca_intpri, ca->ca_intvec);
evcnt_attach_dynamic(&xyc->sc_intrcnt, EVCNT_TYPE_INTR, NULL,
device_xname(self), "intr");
callout_init(&xyc->sc_tick_ch, 0);
/* now we must look for disks using autoconfig */
for (xa.driveno = 0; xa.driveno < XYC_MAXDEV; xa.driveno++)
(void)config_found(self, (void *)&xa, xyc_print, CFARGS_NONE);
/* start the watchdog clock */
callout_reset(&xyc->sc_tick_ch, XYC_TICKCNT, xyc_tick, xyc);
}
static int
xyc_print(void *aux, const char *name)
{
struct xyc_attach_args *xa = aux;
if (name != NULL)
aprint_normal("%s: ", name);
if (xa->driveno != -1)
aprint_normal(" drive %d", xa->driveno);
return UNCONF;
}
/*
* 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!). Also, wire down the relationship between the
* xy* and xyc* devices, to simplify boot device identification.
*/
static int
xymatch(device_t parent, cfdata_t cf, void *aux)
{
struct xyc_attach_args *xa = aux;
int xy_unit;
/* Match only on the "wired-down" controller+disk. */
xy_unit = device_unit(parent) * 2 + xa->driveno;
if (cf->cf_unit != xy_unit)
return 0;
return 1;
}
/*
* xyattach: attach a disk.
*/
static void
xyattach(device_t parent, device_t self, void *aux)
{
struct xy_softc *xy = device_private(self);
struct xyc_softc *xyc = device_private(parent);
struct xyc_attach_args *xa = aux;
xy->sc_dev = self;
aprint_normal("\n");
/*
* Always re-initialize the disk structure. We want statistics
* to start with a clean slate.
*/
memset(&xy->sc_dk, 0, sizeof(xy->sc_dk));
disk_init(&xy->sc_dk, device_xname(self), &xydkdriver);
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;
xyc->sc_drives[xa->driveno] = xy;
/* Do init work common to attach and open. */
xy_init(xy);
}
/*
* end of autoconfig functions
*/
/*
* Initialize a disk. This can be called from both autoconf and
* also from xyopen/xystrategy.
*/
static void
xy_init(struct xy_softc *xy)
{
struct xyc_softc *xyc;
struct dkbad *dkb;
void *dvmabuf;
int err, spt, mb, blk, lcv, fullmode, newstate;
xyc = xy->parent;
xy->state = XY_DRIVE_ATTACHING;
newstate = XY_DRIVE_UNKNOWN;
fullmode = (cold) ? XY_SUB_POLL : XY_SUB_WAIT;
dvmabuf = dvma_malloc(XYFM_BPS);
/* first try and reset the drive */
err = xyc_cmd(xyc, XYCMD_RST, 0, xy->xy_drive, 0, 0, 0, fullmode);
XYC_DONE(xyc, err);
if (err == XY_ERR_DNRY) {
printf("%s: drive %d: off-line\n",
device_xname(xy->sc_dev), xy->xy_drive);
goto done;
}
if (err) {
printf("%s: ERROR 0x%02x (%s)\n",
device_xname(xy->sc_dev), err, xyc_e2str(err));
goto done;
}
printf("%s: drive %d ready",
device_xname(xy->sc_dev), xy->xy_drive);
/*
* 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++) {
err = xyc_cmd(xyc, XYCMD_RD, 0, xy->xy_drive, 0, 1,
dvmabuf, fullmode);
XYC_DONE(xyc, err);
if (err == XY_ERR_AOK)
break;
}
if (err != XY_ERR_AOK) {
printf("%s: reading disk label failed: %s\n",
device_xname(xy->sc_dev), xyc_e2str(err));
goto done;
}
printf("%s: drive type %d\n",
device_xname(xy->sc_dev), 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_attach(&xy->sc_dk);
if (xygetdisklabel(xy, dvmabuf) != XY_ERR_AOK)
goto done;
/* inform the user of what is up */
printf("%s: <%s>, pcyl %d\n",
device_xname(xy->sc_dev),
(char *)dvmabuf, xy->pcyl);
mb = xy->ncyl * (xy->nhead * xy->nsect) / (1048576 / XYFM_BPS);
printf("%s: %dMB, %d cyl, %d head, %d sec\n",
device_xname(xy->sc_dev), mb, xy->ncyl, xy->nhead, xy->nsect);
/*
* 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++) {
struct xy_softc *oxy;
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);
err = xyc_cmd(xyc, XYCMD_SDS, 0, xy->xy_drive, blk, 0, 0, fullmode);
XYC_DONE(xyc, err);
if (err) {
printf("%s: write drive size failed: %s\n",
device_xname(xy->sc_dev), xyc_e2str(err));
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 */
err = xyc_cmd(xyc, XYCMD_RD, 0, xy->xy_drive, blk, 1,
dvmabuf, fullmode);
XYC_DONE(xyc, err);
if (err) {
printf("%s: reading bad144 failed: %s\n",
device_xname(xy->sc_dev), xyc_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 >= 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) {
printf("%s: warning: invalid bad144 sector!\n",
device_xname(xy->sc_dev));
} else {
memcpy(&xy->dkb, dvmabuf, XYFM_BPS);
}
done:
xy->state = newstate;
dvma_free(dvmabuf, XYFM_BPS);
}
/*
* { b , c } d e v s w f u n c t i o n s
*/
/*
* xyclose: close device
*/
static 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
*/
static int
xydump(dev_t dev, daddr_t blkno, void *va, size_t sz)
{
int unit, part;
struct xy_softc *xy;
unit = DISKUNIT(dev);
part = DISKPART(dev);
xy = device_lookup_private(&xy_cd, unit);
if (xy == NULL)
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.
*/
static int
xyioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l)
{
struct xy_softc *xy;
struct xd_iocmd *xio;
int error, s, unit;
unit = DISKUNIT(dev);
xy = device_lookup_private(&xy_cd, unit);
if (xy == NULL)
return ENXIO;
error = disk_ioctl(&xy->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(&xy->dkb, addr, sizeof(xy->dkb));
splx(s);
return 0;
case DIOCSDINFO: /* set disk label */
if ((flag & FWRITE) == 0)
return EBADF;
error = setdisklabel(xy->sc_dk.dk_label,
(struct disklabel *)addr, /* 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 */
if ((flag & FWRITE) == 0)
return EBADF;
error = setdisklabel(xy->sc_dk.dk_label,
(struct disklabel *)addr, /* 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
*/
static int
xyopen(dev_t dev, int flag, int fmt, struct lwp *l)
{
int err, unit, part, s;
struct xy_softc *xy;
/* first, could it be a valid target? */
unit = DISKUNIT(dev);
xy = device_lookup_private(&xy_cd, unit);
if (xy == NULL)
return ENXIO;
part = DISKPART(dev);
err = 0;
/*
* If some other processing is doing init, sleep.
*/
s = splbio();
while (xy->state == XY_DRIVE_ATTACHING) {
if (tsleep(&xy->state, PRIBIO, "xyopen", 0)) {
err = EINTR;
goto done;
}
}
/* Do we need to init the drive? */
if (xy->state == XY_DRIVE_UNKNOWN) {
xy_init(xy);
wakeup(&xy->state);
}
/* Was the init successful? */
if (xy->state == XY_DRIVE_UNKNOWN) {
err = EIO;
goto done;
}
/* 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)) {
err = ENXIO;
goto done;
}
/* 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;
done:
splx(s);
return err;
}
static int
xyread(dev_t dev, struct uio *uio, int flags)
{
return physio(xystrategy, NULL, dev, B_READ, minphys, uio);
}
static 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
*/
static int
xysize(dev_t dev)
{
struct xy_softc *xysc;
int unit, part, size, omask;
/* valid unit? */
unit = DISKUNIT(dev);
xysc = device_lookup_private(&xy_cd, unit);
if (xysc == 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.
*/
static void
xystrategy(struct buf *bp)
{
struct xy_softc *xy;
int s, unit;
struct disklabel *lp;
daddr_t blkno;
unit = DISKUNIT(bp->b_dev);
/* check for live device */
xy = device_lookup_private(&xy_cd, unit);
if (xy == NULL ||
bp->b_blkno < 0 ||
(bp->b_bcount % xy->sc_dk.dk_label->d_secsize) != 0) {
bp->b_error = EINVAL;
goto done;
}
/* There should always be an open first. */
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); /* XXX disksort_cylinder */
/* 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->errno = rq->lasterror = 0;
rq->blockno = blk;
rq->sectcnt = cnt;
rq->dbuf = rq->dbufbase = 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->errno = 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;
if (iorq->dbuf == NULL) {
iopb->dataa = 0;
iopb->datar = 0;
} else {
dp = dvma_kvtopa(iorq->dbuf, iorq->xyc->bustype);
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)
{
struct xy_iorq *iorq = xycsc->ciorq;
struct xy_iopb *iopb = xycsc->ciopb;
int submode = XY_STATE(fullmode);
/*
* 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)
{
struct xy_iorq *iorq;
struct xy_iopb *iopb;
u_long block;
void *dbuf;
iorq = xysc->xyrq;
iopb = iorq->iopb;
/* get buf */
if (bp == NULL)
panic("%s null buf", __func__);
#ifdef XYC_DEBUG
int partno = DISKPART(bp->b_dev);
printf("%s: %s%c: %s block %d\n", __func__, device_xname(xysc->sc_dev),
'a' + partno, (bp->b_flags & B_READ) ? "read" : "write",
(int)bp->b_blkno);
printf("xyc_startbuf: b_bcount %d, b_data 0x%x\n",
bp->b_bcount, bp->b_data);
#endif
/*
* load request.
*
* 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_rawblkno;
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(xycsc->sc_dev));
return XY_ERR_FAIL; /* XXX: need some sort of
* call-back scheme here? */
}
/* init iorq and load iopb from it */
xyc_rqinit(iorq, xycsc, xysc, XY_SUB_NORM | XY_MODE_VERBO, block,
bp->b_bcount / XYFM_BPS, dbuf, 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 *iopb;
u_long iopbaddr;
#ifdef XYC_DEBUG
printf("%s(%s, addr=0x%x, type=%d)\n", __func__,
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("%s: XYC not ready (BUSY)\n", __func__);
#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->errno);
case XY_SUB_POLL: /* steal controller */
iopbaddr = xycsc->xyc->xyc_rsetup; /* RESET */
if (xyc_unbusy(xycsc->xyc, XYC_RESETUSEC) ==
XY_ERR_FAIL)
panic("%s: stuck xyc", __func__);
printf("%s: stole controller\n",
device_xname(xycsc->sc_dev));
break;
default:
panic("%s adding", __func__);
}
}
iopb = xyc_chain(xycsc, iorq); /* build chain */
if (iopb == NULL) { /* nothing doing? */
if (type == XY_SUB_NORM || type == XY_SUB_NOQ)
return XY_ERR_AOK;
panic("xyc_submit_iorq: xyc_chain failed!");
}
iopbaddr = dvma_kvtopa(iopb, xycsc->bustype);
XYC_GO(xycsc->xyc, iopbaddr);
/* 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->errno;
case XY_SUB_POLL:
return xyc_piodriver(xycsc, iorq);
default:
panic("%s wrap up", __func__);
}
panic("%s impossible", __func__);
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;
struct xy_iopb *iopb, *prev_iopb;
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->iopb;
}
/*
* 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) {
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;
prev_iopb->nxtiopb = 0xffff &
dvma_kvtopa(iopb, xycsc->bustype);
} else { /* head of chain */
iorq = xycsc->xy_chain[chain];
}
chain++;
if (xycsc->no_ols)
break; /* quit if chaining dis-allowed */
}
return iorq ? iorq->iopb : 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("%s(%s, 0x%x)\n", __func__, 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("%s: timeout\n", __func__);
#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->errno;
#ifdef XYC_DEBUG
printf("%s: done, retval = 0x%x (%s)\n", __func__,
iorq->errno, xyc_e2str(iorq->errno));
#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;
u_long addr;
int del;
memcpy(&tmpiopb, xycsc->ciopb, sizeof(tmpiopb));
xycsc->ciopb->chen = xycsc->ciopb->done = xycsc->ciopb->errs = 0;
xycsc->ciopb->ien = 0;
xycsc->ciopb->com = XYCMD_RST;
xycsc->ciopb->unit = xysc->xy_drive;
addr = dvma_kvtopa(xycsc->ciopb, xycsc->bustype);
XYC_GO(xycsc->xyc, addr);
del = XYC_RESETUSEC;
while (del > 0) {
if ((xycsc->xyc->xyc_csr & XYC_GBSY) == 0)
break;
DELAY(1);
del--;
}
if (del <= 0 || xycsc->ciopb->errs) {
printf("%s: off-line: %s\n", device_xname(xycsc->sc_dev),
xyc_e2str(xycsc->ciopb->errno));
del = xycsc->xyc->xyc_rsetup;
if (xyc_unbusy(xycsc->xyc, XYC_RESETUSEC) == XY_ERR_FAIL)
panic("%s", __func__);
} else {
xycsc->xyc->xyc_csr = XYC_IPND; /* clear IPND */
}
memcpy(xycsc->ciopb, &tmpiopb, sizeof(tmpiopb));
}
/*
* 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;
struct xy_iorq *iorq;
/* soft reset hardware */
if (quiet == 0)
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++) {
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->errno = 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;
/* Sun3: map/unmap regardless of B_PHYS */
dvma_mapout(iorq->dbufbase,
iorq->buf->b_bcount);
(void)bufq_get(iorq->xy->xyq);
disk_unbusy(&iorq->xy->sc_dk,
(iorq->buf->b_bcount - iorq->buf->b_resid),
(iorq->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 errno, 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.
*/
errno = XY_ERR_DERR;
printf("%s: DOUBLE ERROR!\n", device_xname(xycsc->sc_dev));
if (xyc_reset(xycsc, 0, XY_RSET_ALL, errno, 0) != XY_ERR_AOK) {
printf("%s: soft reset failed!\n",
device_xname(xycsc->sc_dev));
panic("%s: controller DEAD", __func__);
}
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->errno = iopb->errno;
else
iorq->errno = 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->errno = iopb->errno = 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 = dvma_kvtopa(iorq->dbuf, xycsc->bustype);
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 */
}
/* Sun3: map/unmap regardless of B_PHYS */
dvma_mapout(iorq->dbufbase, iorq->buf->b_bcount);
(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 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
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->errno));
else
if (iorq->errno == 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 errno = iorq->errno;
int erract = xyc_entoact(errno);
int oldmode, advance, i;
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, errno, 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);
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->errno = 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! */
}
}
/*
* 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 = errno;
if ((erract == XY_ERA_RSET || erract == XY_ERA_HARD)
&& iorq->tries < XYC_MAXTRIES) { /* retry? */
iorq->tries++;
iorq->errno = iopb->errno = 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, err, rqno;
void *dvmabuf = NULL;
struct xyc_softc *xycsc;
/* 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;/* ??? */
}
/* create DVMA buffer for request if needed */
if (xio->dlen) {
dvmabuf = dvma_malloc(xio->dlen);
if (xio->cmd == XYCMD_WR) {
err = copyin(xio->dptr, dvmabuf, xio->dlen);
if (err) {
dvma_free(dvmabuf, xio->dlen);
return err;
}
}
}
/* do it! */
err = 0;
xycsc = xy->parent;
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) {
err = EIO;
goto done;
}
xio->errno = xycsc->ciorq->errno;
xio->tries = xycsc->ciorq->tries;
XYC_DONE(xycsc, err);
if (xio->cmd == XYCMD_RD)
err = copyout(dvmabuf, xio->dptr, xio->dlen);
done:
splx(s);
if (dvmabuf)
dvma_free(dvmabuf, xio->dlen);
return err;
}
/*
* 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 errno)
{
switch (errno) {
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; /* ??? */
}
