/* $NetBSD: xd.c,v 1.78 2023/01/23 21:52:01 andvar 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 * 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 __KERNEL_RCSID(0, "$NetBSD: xd.c,v 1.78 2023/01/23 21:52:01 andvar 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #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? */ }; dev_type_open(xdopen); dev_type_close(xdclose); dev_type_read(xdread); dev_type_write(xdwrite); dev_type_ioctl(xdioctl); dev_type_strategy(xdstrategy); dev_type_dump(xddump); 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 */ 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 */ 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. */ 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 */ 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; } int xdread(dev_t dev, struct uio *uio, int flags) { return physio(xdstrategy, NULL, dev, B_READ, minphys, uio); } 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 */ 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. */ 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), (failed) * POLL: * NOQ : * * 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"; } }