File:  [DragonFly] / src / sys / dev / disk / ata / ata-disk.c
Revision 1.8: download - view: text, annotated - select for diffs
Sun Nov 30 20:14:18 2003 UTC (10 years, 10 months ago) by dillon
Branches: MAIN
CVS tags: HEAD
Add the MPIPE subsystem.  This subsystem is used for 'pipelining' fixed-size
allocations.  Pipelining is used to avoid lack-of-resource deadlocks by
still allowing resource allocations to 'block' by guarenteeing that an
already in-progress operation will soon free memory that will be immediately
used to satisfy the blocked resource.

Adjust the ATAold code to use the new mechanism and remove the code that
tried to back-off into PIO mode when resources were lacking.

    1: /*-
    2:  * Copyright (c) 1998,1999,2000,2001,2002 Søren Schmidt <sos@FreeBSD.org>
    3:  * All rights reserved.
    4:  *
    5:  * Redistribution and use in source and binary forms, with or without
    6:  * modification, are permitted provided that the following conditions
    7:  * are met:
    8:  * 1. Redistributions of source code must retain the above copyright
    9:  *    notice, this list of conditions and the following disclaimer,
   10:  *    without modification, immediately at the beginning of the file.
   11:  * 2. Redistributions in binary form must reproduce the above copyright
   12:  *    notice, this list of conditions and the following disclaimer in the
   13:  *    documentation and/or other materials provided with the distribution.
   14:  * 3. The name of the author may not be used to endorse or promote products
   15:  *    derived from this software without specific prior written permission.
   16:  *
   17:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   18:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   19:  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   20:  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   21:  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   22:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   23:  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   24:  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   25:  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   26:  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   27:  *
   28:  * $FreeBSD: src/sys/dev/ata/ata-disk.c,v 1.60.2.24 2003/01/30 07:19:59 sos Exp $
   29:  * $DragonFly: src/sys/dev/disk/ata/ata-disk.c,v 1.8 2003/11/30 20:14:18 dillon Exp $
   30:  */
   31: 
   32: #include "opt_ata.h"
   33: #include <sys/param.h>
   34: #include <sys/systm.h>
   35: #include <sys/ata.h>
   36: #include <sys/kernel.h>
   37: #include <sys/malloc.h>
   38: #include <sys/buf.h>
   39: #include <sys/bus.h>
   40: #include <sys/conf.h>
   41: #include <sys/disk.h>
   42: #include <sys/devicestat.h>
   43: #include <sys/cons.h>
   44: #include <sys/sysctl.h>
   45: #include <sys/syslog.h>
   46: #include <vm/vm.h>
   47: #include <vm/pmap.h>
   48: #include <machine/md_var.h>
   49: #include <machine/bus.h>
   50: #include <machine/clock.h>
   51: #include <sys/rman.h>
   52: #include "ata-all.h"
   53: #include "ata-disk.h"
   54: #include "ata-raid.h"
   55: #include <sys/proc.h>
   56: #include <sys/buf2.h>
   57: 
   58: /* device structures */
   59: static d_open_t		adopen;
   60: static d_close_t	adclose;
   61: static d_strategy_t	adstrategy;
   62: static d_dump_t		addump;
   63: 
   64: static struct cdevsw ad_cdevsw = {
   65: 	/* name */	"ad",
   66: 	/* maj */	116,
   67: 	/* flags */	D_DISK,
   68: 	/* port */      NULL,
   69: 	/* autoq */	0,
   70: 
   71: 	/* open */	adopen,
   72: 	/* close */	adclose,
   73: 	/* read */	physread,
   74: 	/* write */	physwrite,
   75: 	/* ioctl */	noioctl,
   76: 	/* poll */	nopoll,
   77: 	/* mmap */	nommap,
   78: 	/* strategy */	adstrategy,
   79: 	/* dump */	addump,
   80: 	/* psize */	nopsize
   81: };
   82: 
   83: /* prototypes */
   84: static void ad_invalidatequeue(struct ad_softc *, struct ad_request *);
   85: static int ad_tagsupported(struct ad_softc *);
   86: static void ad_timeout(struct ad_request *);
   87: static void ad_free(struct ad_request *);
   88: static int ad_version(u_int16_t);
   89: 
   90: /* misc defines */
   91: #define AD_MAX_RETRIES	3
   92: 
   93: /* internal vars */
   94: static u_int32_t adp_lun_map = 0;
   95: static int ata_dma = 1;
   96: static int ata_wc = 1;
   97: static int ata_tags = 0; 
   98: TUNABLE_INT("hw.ata.ata_dma", &ata_dma);
   99: TUNABLE_INT("hw.ata.wc", &ata_wc);
  100: TUNABLE_INT("hw.ata.tags", &ata_tags);
  101: static MALLOC_DEFINE(M_AD, "AD driver", "ATA disk driver");
  102: 
  103: /* sysctl vars */
  104: SYSCTL_DECL(_hw_ata);
  105: SYSCTL_INT(_hw_ata, OID_AUTO, ata_dma, CTLFLAG_RD, &ata_dma, 0,
  106: 	   "ATA disk DMA mode control");
  107: SYSCTL_INT(_hw_ata, OID_AUTO, wc, CTLFLAG_RD, &ata_wc, 0,
  108: 	   "ATA disk write caching");
  109: SYSCTL_INT(_hw_ata, OID_AUTO, tags, CTLFLAG_RD, &ata_tags, 0,
  110: 	   "ATA disk tagged queuing support");
  111: 
  112: void
  113: ad_attach(struct ata_device *atadev)
  114: {
  115:     struct ad_softc *adp;
  116:     dev_t dev;
  117: 
  118:     if (!(adp = malloc(sizeof(struct ad_softc), M_AD, M_WAITOK | M_ZERO))) {
  119: 	ata_prtdev(atadev, "failed to allocate driver storage\n");
  120: 	return;
  121:     }
  122: 
  123:     KKASSERT(atadev->channel->req_mpipe.max_count != 0);
  124: 
  125:     adp->device = atadev;
  126: #ifdef ATA_STATIC_ID
  127:     adp->lun = (device_get_unit(atadev->channel->dev)<<1)+ATA_DEV(atadev->unit);
  128: #else
  129:     adp->lun = ata_get_lun(&adp_lun_map);
  130: #endif
  131:     ata_set_name(atadev, "ad", adp->lun);
  132:     adp->heads = atadev->param->heads;
  133:     adp->sectors = atadev->param->sectors;
  134:     adp->total_secs = atadev->param->cylinders * adp->heads * adp->sectors;	
  135:     bufq_init(&adp->queue);
  136: 
  137:     /* does this device need oldstyle CHS addressing */
  138:     if (!ad_version(atadev->param->version_major) || 
  139: 	!(atadev->param->atavalid & ATA_FLAG_54_58) || !atadev->param->lba_size)
  140: 	adp->flags |= AD_F_CHS_USED;
  141: 
  142:     /* use the 28bit LBA size if valid */
  143:     if (atadev->param->cylinders == 16383 &&
  144: 	adp->total_secs < atadev->param->lba_size)
  145: 	adp->total_secs = atadev->param->lba_size;
  146: 
  147:     /* use the 48bit LBA size if valid */
  148:     if (atadev->param->support.address48 &&
  149: 	atadev->param->lba_size48 > 268435455)
  150: 	adp->total_secs = atadev->param->lba_size48;
  151:     
  152:     ATA_SLEEPLOCK_CH(atadev->channel, ATA_CONTROL);
  153:     /* use multiple sectors/interrupt if device supports it */
  154:     adp->transfersize = DEV_BSIZE;
  155:     if (ad_version(atadev->param->version_major)) {
  156: 	int secsperint = max(1, min(atadev->param->sectors_intr, 16));
  157: 
  158: 	if (!ata_command(atadev, ATA_C_SET_MULTI, 0, secsperint,
  159: 			 0, ATA_WAIT_INTR) && !ata_wait(atadev, 0))
  160: 	adp->transfersize *= secsperint;
  161:     }
  162: 
  163:     /* enable read caching if not default on device */
  164:     if (ata_command(atadev, ATA_C_SETFEATURES,
  165: 		    0, 0, ATA_C_F_ENAB_RCACHE, ATA_WAIT_INTR))
  166: 	ata_prtdev(atadev, "enabling readahead cache failed\n");
  167: 
  168:     /* enable write caching if allowed and not default on device */
  169:     if (ata_wc || (ata_tags && ad_tagsupported(adp))) {
  170: 	if (ata_command(atadev, ATA_C_SETFEATURES,
  171: 			0, 0, ATA_C_F_ENAB_WCACHE, ATA_WAIT_INTR))
  172: 	    ata_prtdev(atadev, "enabling write cache failed\n");
  173:     }
  174:     else {
  175: 	if (ata_command(atadev, ATA_C_SETFEATURES,
  176: 			0, 0, ATA_C_F_DIS_WCACHE, ATA_WAIT_INTR))
  177: 	    ata_prtdev(atadev, "disabling write cache failed\n");
  178:     }
  179: 
  180:     /* use DMA if allowed and if drive/controller supports it */
  181:     if (ata_dma)
  182: 	ata_dmainit(atadev->channel, atadev->unit, ata_pmode(atadev->param), 
  183: 		    ata_wmode(atadev->param), ata_umode(atadev->param));
  184:     else
  185: 	ata_dmainit(atadev->channel, atadev->unit,
  186: 		    ata_pmode(atadev->param), -1, -1);
  187: 
  188:     /* use tagged queueing if allowed and supported */
  189:     if (ata_tags && ad_tagsupported(adp)) {
  190: 	adp->num_tags = atadev->param->queuelen;
  191: 	adp->flags |= AD_F_TAG_ENABLED;
  192: 	adp->device->channel->flags |= ATA_QUEUED;
  193: 	if (ata_command(atadev, ATA_C_SETFEATURES,
  194: 			0, 0, ATA_C_F_DIS_RELIRQ, ATA_WAIT_INTR))
  195: 	    ata_prtdev(atadev, "disabling release interrupt failed\n");
  196: 	if (ata_command(atadev, ATA_C_SETFEATURES,
  197: 			0, 0, ATA_C_F_DIS_SRVIRQ, ATA_WAIT_INTR))
  198: 	    ata_prtdev(atadev, "disabling service interrupt failed\n");
  199:     }
  200: 
  201:     ATA_UNLOCK_CH(atadev->channel);
  202: 
  203:     devstat_add_entry(&adp->stats, "ad", adp->lun, DEV_BSIZE,
  204: 		      DEVSTAT_NO_ORDERED_TAGS,
  205: 		      DEVSTAT_TYPE_DIRECT | DEVSTAT_TYPE_IF_IDE,
  206: 		      DEVSTAT_PRIORITY_DISK);
  207: 
  208:     dev = disk_create(adp->lun, &adp->disk, 0, &ad_cdevsw);
  209:     dev->si_drv1 = adp;
  210:     dev->si_iosize_max = 256 * DEV_BSIZE;
  211:     adp->dev = dev;
  212: 
  213:     /* construct the disklabel */
  214:     bzero(&adp->disk.d_label, sizeof(struct disklabel));
  215:     adp->disk.d_label.d_secsize = DEV_BSIZE;
  216:     adp->disk.d_label.d_nsectors = adp->sectors;
  217:     adp->disk.d_label.d_ntracks = adp->heads;
  218:     adp->disk.d_label.d_ncylinders = adp->total_secs/(adp->heads*adp->sectors);
  219:     adp->disk.d_label.d_secpercyl = adp->sectors * adp->heads;
  220:     adp->disk.d_label.d_secperunit = adp->total_secs;
  221: 
  222:     atadev->driver = adp;
  223:     atadev->flags = 0;
  224: 
  225:     /* if this disk belongs to an ATA RAID dont print the probe */
  226:     if (ata_raiddisk_attach(adp))
  227: 	adp->flags |= AD_F_RAID_SUBDISK;
  228:     else {
  229: 	if (atadev->driver) {
  230: 	    ad_print(adp);
  231: 	    ata_enclosure_print(atadev);
  232: 	}
  233:     }
  234: }
  235: 
  236: void
  237: ad_detach(struct ata_device *atadev, int flush) /* get rid of flush XXX SOS */
  238: {
  239:     struct ad_softc *adp = atadev->driver;
  240:     struct ad_request *request;
  241:     struct buf *bp;
  242: 
  243:     atadev->flags |= ATA_D_DETACHING;
  244:     ata_prtdev(atadev, "removed from configuration\n");
  245:     ad_invalidatequeue(adp, NULL);
  246:     TAILQ_FOREACH(request, &atadev->channel->ata_queue, chain) {
  247: 	if (request->softc != adp)
  248: 	    continue;
  249: 	TAILQ_REMOVE(&atadev->channel->ata_queue, request, chain);
  250: 	request->bp->b_error = ENXIO;
  251: 	request->bp->b_flags |= B_ERROR;
  252: 	biodone(request->bp);
  253: 	ad_free(request);
  254:     }
  255:     while ((bp = bufq_first(&adp->queue))) {
  256: 	bufq_remove(&adp->queue, bp); 
  257: 	bp->b_error = ENXIO;
  258: 	bp->b_flags |= B_ERROR;
  259: 	biodone(bp);
  260:     }
  261:     disk_invalidate(&adp->disk);
  262:     devstat_remove_entry(&adp->stats);
  263:     disk_destroy(&adp->disk);
  264:     if (flush) {
  265: 	if (ata_command(atadev, ATA_C_FLUSHCACHE, 0, 0, 0, ATA_WAIT_READY))
  266: 	    ata_prtdev(atadev, "flushing cache on detach failed\n");
  267:     }
  268:     if (adp->flags & AD_F_RAID_SUBDISK)
  269: 	ata_raiddisk_detach(adp);
  270:     ata_free_name(atadev);
  271:     ata_free_lun(&adp_lun_map, adp->lun);
  272:     atadev->driver = NULL;
  273:     atadev->flags = 0;
  274:     free(adp, M_AD);
  275: }
  276: 
  277: static int
  278: adopen(dev_t dev, int flags, int fmt, struct thread *td)
  279: {
  280:     struct ad_softc *adp = dev->si_drv1;
  281: 
  282:     if (adp->flags & AD_F_RAID_SUBDISK)
  283: 	return EBUSY;
  284:     return 0;
  285: }
  286: 
  287: static int
  288: adclose(dev_t dev, int flags, int fmt, struct thread *td)
  289: {
  290:     struct ad_softc *adp = dev->si_drv1;
  291: 
  292:     ATA_SLEEPLOCK_CH(adp->device->channel, ATA_CONTROL);
  293:     if (ata_command(adp->device, ATA_C_FLUSHCACHE, 0, 0, 0, ATA_WAIT_READY))
  294: 	ata_prtdev(adp->device, "flushing cache on close failed\n");
  295:     ATA_UNLOCK_CH(adp->device->channel);
  296:     return 0;
  297: }
  298: 
  299: static void 
  300: adstrategy(struct buf *bp)
  301: {
  302:     struct ad_softc *adp = bp->b_dev->si_drv1;
  303:     int s;
  304: 
  305:     if (adp->device->flags & ATA_D_DETACHING) {
  306: 	bp->b_error = ENXIO;
  307: 	bp->b_flags |= B_ERROR;
  308: 	biodone(bp);
  309: 	return;
  310:     }
  311:     s = splbio();
  312:     bufqdisksort(&adp->queue, bp);
  313:     splx(s);
  314:     ata_start(adp->device->channel);
  315: }
  316: 
  317: int
  318: addump(dev_t dev)
  319: {
  320:     struct ad_softc *adp = dev->si_drv1;
  321:     struct ad_request request;
  322:     u_int count, blkno, secsize;
  323:     vm_offset_t addr = 0;
  324:     long blkcnt;
  325:     int dumppages = MAXDUMPPGS;
  326:     int error;
  327:     int i;
  328: 
  329:     if ((error = disk_dumpcheck(dev, &count, &blkno, &secsize)))
  330: 	return error;
  331: 	
  332:     if (!adp)
  333: 	return ENXIO;
  334: 
  335:     /* force PIO mode for dumps */
  336:     adp->device->mode = ATA_PIO;
  337:     ata_reinit(adp->device->channel);
  338: 
  339:     blkcnt = howmany(PAGE_SIZE, secsize);
  340: 
  341:     while (count > 0) {
  342: 	caddr_t va = NULL;
  343: 	DELAY(1000);
  344: 
  345: 	if ((count / blkcnt) < dumppages)
  346: 	    dumppages = count / blkcnt;
  347: 
  348: 	for (i = 0; i < dumppages; ++i) {
  349: 	    vm_offset_t a = addr + (i * PAGE_SIZE);
  350: 	    if (is_physical_memory(a))
  351: 		va = pmap_kenter_temporary(trunc_page(a), i);
  352: 	    else
  353: 		va = pmap_kenter_temporary(trunc_page(0), i);
  354: 	}
  355: 
  356: 	bzero(&request, sizeof(struct ad_request));
  357: 	request.softc = adp;
  358: 	request.blockaddr = blkno;
  359: 	request.bytecount = PAGE_SIZE * dumppages;
  360: 	request.data = va;
  361: 
  362: 	while (request.bytecount > 0) {
  363: 	    ad_transfer(&request);
  364: 	    if (request.flags & ADR_F_ERROR)
  365: 		return EIO;
  366: 	    request.donecount += request.currentsize;
  367: 	    request.bytecount -= request.currentsize;
  368: 	    DELAY(20);
  369: 	}
  370: 
  371: 	if (dumpstatus(addr, (off_t)count * DEV_BSIZE) < 0)
  372: 	    return EINTR;
  373: 
  374: 	blkno += blkcnt * dumppages;
  375: 	count -= blkcnt * dumppages;
  376: 	addr += PAGE_SIZE * dumppages;
  377:     }
  378: 
  379:     if (ata_wait(adp->device, ATA_S_READY | ATA_S_DSC) < 0)
  380: 	ata_prtdev(adp->device, "timeout waiting for final ready\n");
  381:     return 0;
  382: }
  383: 
  384: void
  385: ad_start(struct ata_device *atadev)
  386: {
  387:     struct ad_softc *adp = atadev->driver;
  388:     struct buf *bp = bufq_first(&adp->queue);
  389:     struct ad_request *request;
  390:     int tag = 0;
  391: 
  392:     if (!bp)
  393: 	return;
  394: 
  395:     /* if tagged queueing enabled get next free tag */
  396:     if (adp->flags & AD_F_TAG_ENABLED) {
  397: 	while (tag <= adp->num_tags && adp->tags[tag])
  398: 	    tag++;
  399: 	if (tag > adp->num_tags )
  400: 	    return;
  401:     }
  402: 
  403:     /*
  404:      * Allocate a request.  The allocation can only fail if the pipeline
  405:      * is full, in which case the request will be picked up later when
  406:      * ad_start() is called after another request completes.
  407:      */
  408:     request = mpipe_alloc(&atadev->channel->req_mpipe, M_NOWAIT|M_ZERO);
  409:     if (request == NULL) {
  410: 	ata_prtdev(atadev, "pipeline full allocating request in ad_start\n");
  411: 	return;
  412:     }
  413: 
  414:     /* setup request */
  415:     request->softc = adp;
  416:     request->bp = bp;
  417:     request->blockaddr = bp->b_pblkno;
  418:     request->bytecount = bp->b_bcount;
  419:     request->data = bp->b_data;
  420:     request->tag = tag;
  421:     if (bp->b_flags & B_READ) 
  422: 	request->flags |= ADR_F_READ;
  423:     if (adp->device->mode >= ATA_DMA) {
  424: 	request->dmatab = ata_dmaalloc(atadev->channel, atadev->unit, M_NOWAIT);
  425: 	if (request->dmatab == NULL) {
  426: 	    mpipe_free(&atadev->channel->req_mpipe, request);
  427: 	    ata_prtdev(atadev, "pipeline full allocated dmabuf in ad_start\n");
  428: 	    /* do not revert to PIO, wait for ad_start after I/O completion */
  429: 	    return;
  430: 	}
  431:     }
  432: 
  433:     /* insert in tag array */
  434:     adp->tags[tag] = request;
  435: 
  436:     /* remove from drive queue */
  437:     bufq_remove(&adp->queue, bp); 
  438: 
  439:     /* link onto controller queue */
  440:     TAILQ_INSERT_TAIL(&atadev->channel->ata_queue, request, chain);
  441: }
  442: 
  443: int
  444: ad_transfer(struct ad_request *request)
  445: {
  446:     struct ad_softc *adp;
  447:     u_int64_t lba;
  448:     u_int32_t count, max_count;
  449:     u_int8_t cmd;
  450:     int flags = ATA_IMMEDIATE;
  451: 
  452:     /* get request params */
  453:     adp = request->softc;
  454: 
  455:     /* calculate transfer details */
  456:     lba = request->blockaddr + (request->donecount / DEV_BSIZE);
  457:    
  458:     if (request->donecount == 0) {
  459: 
  460: 	/* start timeout for this transfer */
  461: 	if (dumping)
  462: 	    request->timeout_handle.callout = NULL;
  463: 	else
  464: 	    request->timeout_handle = 
  465: 		timeout((timeout_t*)ad_timeout, request, 10 * hz);
  466: 
  467: 	/* setup transfer parameters */
  468: 	count = howmany(request->bytecount, DEV_BSIZE);
  469: 	max_count = adp->device->param->support.address48 ? 65536 : 256;
  470: 	if (count > max_count) {
  471: 	    ata_prtdev(adp->device,
  472: 		       "count %d size transfers not supported\n", count);
  473: 	    count = max_count;
  474: 	}
  475: 
  476: 	if (adp->flags & AD_F_CHS_USED) {
  477: 	    int sector = (lba % adp->sectors) + 1;
  478: 	    int cylinder = lba / (adp->sectors * adp->heads);
  479: 	    int head = (lba % (adp->sectors * adp->heads)) / adp->sectors;
  480: 
  481: 	    lba = (sector&0xff) | ((cylinder&0xffff)<<8) | ((head&0xf)<<24);
  482: 	    adp->device->flags |= ATA_D_USE_CHS;
  483: 	}
  484: 
  485: 	/* setup first transfer length */
  486: 	request->currentsize = min(request->bytecount, adp->transfersize);
  487: 
  488: 	devstat_start_transaction(&adp->stats);
  489: 
  490: 	/* does this drive & transfer work with DMA ? */
  491: 	request->flags &= ~ADR_F_DMA_USED;
  492: 	if (adp->device->mode >= ATA_DMA &&
  493: 	    !ata_dmasetup(adp->device->channel, adp->device->unit,
  494: 			  request->dmatab, request->data, request->bytecount)) {
  495: 	    request->flags |= ADR_F_DMA_USED;
  496: 	    request->currentsize = request->bytecount;
  497: 
  498: 	    /* do we have tags enabled ? */
  499: 	    if (adp->flags & AD_F_TAG_ENABLED) {
  500: 		cmd = (request->flags & ADR_F_READ) ?
  501: 		    ATA_C_READ_DMA_QUEUED : ATA_C_WRITE_DMA_QUEUED;
  502: 
  503: 		if (ata_command(adp->device, cmd, lba,
  504: 				request->tag << 3, count, flags)) {
  505: 		    ata_prtdev(adp->device, "error executing command");
  506: 		    goto transfer_failed;
  507: 		}
  508: 		if (ata_wait(adp->device, ATA_S_READY)) {
  509: 		    ata_prtdev(adp->device, "timeout waiting for READY\n");
  510: 		    goto transfer_failed;
  511: 		}
  512: 		adp->outstanding++;
  513: 
  514: 		/* if ATA bus RELEASE check for SERVICE */
  515: 		if (adp->flags & AD_F_TAG_ENABLED &&
  516: 		    ATA_INB(adp->device->channel->r_io, ATA_IREASON) &
  517: 		    ATA_I_RELEASE)
  518: 		    return ad_service(adp, 1);
  519: 	    }
  520: 	    else {
  521: 		cmd = (request->flags & ADR_F_READ) ?
  522: 		    ATA_C_READ_DMA : ATA_C_WRITE_DMA;
  523: 
  524: 		if (ata_command(adp->device, cmd, lba, count, 0, flags)) {
  525: 		    ata_prtdev(adp->device, "error executing command");
  526: 		    goto transfer_failed;
  527: 		}
  528: #if 0
  529: 		/*
  530: 		 * wait for data transfer phase
  531: 		 *
  532: 		 * well this should be here acording to specs, but older
  533: 		 * promise controllers doesn't like it, they lockup!
  534: 		 */
  535: 		if (ata_wait(adp->device, ATA_S_READY | ATA_S_DRQ)) {
  536: 		    ata_prtdev(adp->device, "timeout waiting for data phase\n");
  537: 		    goto transfer_failed;
  538: 		}
  539: #endif
  540: 	    }
  541: 
  542: 	    /* start transfer, return and wait for interrupt */
  543: 	    ata_dmastart(adp->device->channel, adp->device->unit,
  544: 			 request->dmatab, request->flags & ADR_F_READ);
  545: 	    return ATA_OP_CONTINUES;
  546: 	}
  547: 
  548: 	/* does this drive support multi sector transfers ? */
  549: 	if (request->currentsize > DEV_BSIZE)
  550: 	    cmd = request->flags&ADR_F_READ ? ATA_C_READ_MUL : ATA_C_WRITE_MUL;
  551: 
  552: 	/* just plain old single sector transfer */
  553: 	else
  554: 	    cmd = request->flags&ADR_F_READ ? ATA_C_READ : ATA_C_WRITE;
  555: 
  556: 	if (ata_command(adp->device, cmd, lba, count, 0, flags)){
  557: 	    ata_prtdev(adp->device, "error executing command");
  558: 	    goto transfer_failed;
  559: 	}
  560:     }
  561:    
  562:     /* calculate this transfer length */
  563:     request->currentsize = min(request->bytecount, adp->transfersize);
  564: 
  565:     /* if this is a PIO read operation, return and wait for interrupt */
  566:     if (request->flags & ADR_F_READ)
  567: 	return ATA_OP_CONTINUES;
  568: 
  569:     /* ready to write PIO data ? */
  570:     if (ata_wait(adp->device, (ATA_S_READY | ATA_S_DSC | ATA_S_DRQ)) < 0) {
  571: 	ata_prtdev(adp->device, "timeout waiting for DRQ");
  572: 	goto transfer_failed;
  573:     }
  574: 
  575:     /* output the data */
  576:     if (adp->device->channel->flags & ATA_USE_16BIT)
  577: 	ATA_OUTSW(adp->device->channel->r_io, ATA_DATA,
  578: 		  (void *)((uintptr_t)request->data + request->donecount),
  579: 		  request->currentsize / sizeof(int16_t));
  580:     else
  581: 	ATA_OUTSL(adp->device->channel->r_io, ATA_DATA,
  582: 		  (void *)((uintptr_t)request->data + request->donecount),
  583: 		  request->currentsize / sizeof(int32_t));
  584:     return ATA_OP_CONTINUES;
  585: 
  586: transfer_failed:
  587:     untimeout((timeout_t *)ad_timeout, request, request->timeout_handle);
  588:     ad_invalidatequeue(adp, request);
  589:     printf(" - resetting\n");
  590: 
  591:     /* if retries still permit, reinject this request */
  592:     if (request->retries++ < AD_MAX_RETRIES)
  593: 	TAILQ_INSERT_HEAD(&adp->device->channel->ata_queue, request, chain);
  594:     else {
  595: 	/* retries all used up, return error */
  596: 	request->bp->b_error = EIO;
  597: 	request->bp->b_flags |= B_ERROR;
  598: 	request->bp->b_resid = request->bytecount;
  599: 	devstat_end_transaction_buf(&adp->stats, request->bp);
  600: 	biodone(request->bp);
  601: 	ad_free(request);
  602:     }
  603:     ata_reinit(adp->device->channel);
  604:     return ATA_OP_CONTINUES;
  605: }
  606: 
  607: int
  608: ad_interrupt(struct ad_request *request)
  609: {
  610:     struct ad_softc *adp = request->softc;
  611:     int dma_stat = 0;
  612: 
  613:     /* finish DMA transfer */
  614:     if (request->flags & ADR_F_DMA_USED)
  615: 	dma_stat = ata_dmadone(adp->device->channel);
  616: 
  617:     /* do we have a corrected soft error ? */
  618:     if (adp->device->channel->status & ATA_S_CORR)
  619: 	diskerr(request->bp, "soft error (ECC corrected)", LOG_PRINTF,
  620: 		request->blockaddr + (request->donecount / DEV_BSIZE),
  621: 		&adp->disk.d_label);
  622: 
  623:     /* did any real errors happen ? */
  624:     if ((adp->device->channel->status & ATA_S_ERROR) ||
  625: 	(request->flags & ADR_F_DMA_USED && dma_stat & ATA_BMSTAT_ERROR)) {
  626: 	adp->device->channel->error =
  627: 	    ATA_INB(adp->device->channel->r_io, ATA_ERROR);
  628: 	diskerr(request->bp, (adp->device->channel->error & ATA_E_ICRC) ?
  629: 		"UDMA ICRC error" : "hard error", LOG_PRINTF,
  630: 		request->blockaddr + (request->donecount / DEV_BSIZE),
  631: 		&adp->disk.d_label);
  632: 
  633: 	/* if this is a UDMA CRC error, reinject request */
  634: 	if (request->flags & ADR_F_DMA_USED &&
  635: 	    adp->device->channel->error & ATA_E_ICRC) {
  636: 	    untimeout((timeout_t *)ad_timeout, request,request->timeout_handle);
  637: 	    ad_invalidatequeue(adp, request);
  638: 
  639: 	    if (request->retries++ < AD_MAX_RETRIES)
  640: 		printf(" retrying\n");
  641: 	    else {
  642: 		ata_dmainit(adp->device->channel, adp->device->unit, 
  643: 			    ata_pmode(adp->device->param), -1, -1);
  644: 		printf(" falling back to PIO mode\n");
  645: 	    }
  646: 	    TAILQ_INSERT_HEAD(&adp->device->channel->ata_queue, request, chain);
  647: 	    return ATA_OP_FINISHED;
  648: 	}
  649: 
  650: 	/* if using DMA, try once again in PIO mode */
  651: 	if (request->flags & ADR_F_DMA_USED) {
  652: 	    untimeout((timeout_t *)ad_timeout, request,request->timeout_handle);
  653: 	    ad_invalidatequeue(adp, request);
  654: 	    ata_dmainit(adp->device->channel, adp->device->unit,
  655: 			ata_pmode(adp->device->param), -1, -1);
  656: 	    request->flags |= ADR_F_FORCE_PIO;
  657: 	    printf(" trying PIO mode\n");
  658: 	    TAILQ_INSERT_HEAD(&adp->device->channel->ata_queue, request, chain);
  659: 	    return ATA_OP_FINISHED;
  660: 	}
  661: 
  662: 	request->flags |= ADR_F_ERROR;
  663: 	printf(" status=%02x error=%02x\n", 
  664: 	       adp->device->channel->status, adp->device->channel->error);
  665:     }
  666: 
  667:     /* if we arrived here with forced PIO mode, DMA doesn't work right */
  668:     if (request->flags & ADR_F_FORCE_PIO && !(request->flags & ADR_F_ERROR))
  669: 	ata_prtdev(adp->device, "DMA problem fallback to PIO mode\n");
  670: 
  671:     /* if this was a PIO read operation, get the data */
  672:     if (!(request->flags & ADR_F_DMA_USED) &&
  673: 	(request->flags & (ADR_F_READ | ADR_F_ERROR)) == ADR_F_READ) {
  674: 
  675: 	/* ready to receive data? */
  676: 	if ((adp->device->channel->status & (ATA_S_READY|ATA_S_DSC|ATA_S_DRQ))
  677: 	    != (ATA_S_READY|ATA_S_DSC|ATA_S_DRQ))
  678: 	    ata_prtdev(adp->device, "read interrupt arrived early");
  679: 
  680: 	if (ata_wait(adp->device, (ATA_S_READY | ATA_S_DSC | ATA_S_DRQ)) != 0) {
  681: 	    ata_prtdev(adp->device, "read error detected (too) late");
  682: 	    request->flags |= ADR_F_ERROR;
  683: 	}
  684: 	else {
  685: 	    /* data ready, read in */
  686: 	    if (adp->device->channel->flags & ATA_USE_16BIT)
  687: 		ATA_INSW(adp->device->channel->r_io, ATA_DATA,
  688: 			 (void*)((uintptr_t)request->data + request->donecount),
  689: 			 request->currentsize / sizeof(int16_t));
  690: 	    else
  691: 		ATA_INSL(adp->device->channel->r_io, ATA_DATA,
  692: 			 (void*)((uintptr_t)request->data + request->donecount),
  693: 			 request->currentsize / sizeof(int32_t));
  694: 	}
  695:     }
  696: 
  697:     /* finish up transfer */
  698:     if (request->flags & ADR_F_ERROR) {
  699: 	request->bp->b_error = EIO;
  700: 	request->bp->b_flags |= B_ERROR;
  701:     } 
  702:     else {
  703: 	request->bytecount -= request->currentsize;
  704: 	request->donecount += request->currentsize;
  705: 	if (request->bytecount > 0) {
  706: 	    ad_transfer(request);
  707: 	    return ATA_OP_CONTINUES;
  708: 	}
  709:     }
  710: 
  711:     /* disarm timeout for this transfer */
  712:     untimeout((timeout_t *)ad_timeout, request, request->timeout_handle);
  713: 
  714:     request->bp->b_resid = request->bytecount;
  715: 
  716:     devstat_end_transaction_buf(&adp->stats, request->bp);
  717:     biodone(request->bp);
  718:     ad_free(request);
  719:     adp->outstanding--;
  720: 
  721:     /* check for SERVICE (tagged operations only) */
  722:     return ad_service(adp, 1);
  723: }
  724: 
  725: int
  726: ad_service(struct ad_softc *adp, int change)
  727: {
  728:     /* do we have to check the other device on this channel ? */
  729:     if (adp->device->channel->flags & ATA_QUEUED && change) {
  730: 	int device = adp->device->unit;
  731: 
  732: 	if (adp->device->unit == ATA_MASTER) {
  733: 	    if ((adp->device->channel->devices & ATA_ATA_SLAVE) &&
  734: 		(adp->device->channel->device[SLAVE].driver) &&
  735: 		((struct ad_softc *) (adp->device->channel->
  736: 		 device[SLAVE].driver))->flags & AD_F_TAG_ENABLED)
  737: 		device = ATA_SLAVE;
  738: 	}
  739: 	else {
  740: 	    if ((adp->device->channel->devices & ATA_ATA_MASTER) &&
  741: 		(adp->device->channel->device[MASTER].driver) &&
  742: 		((struct ad_softc *) (adp->device->channel->
  743: 		 device[MASTER].driver))->flags & AD_F_TAG_ENABLED)
  744: 		device = ATA_MASTER;
  745: 	}
  746: 	if (device != adp->device->unit &&
  747: 	    ((struct ad_softc *)
  748: 	     (adp->device->channel->
  749: 	      device[ATA_DEV(device)].driver))->outstanding > 0) {
  750: 	    ATA_OUTB(adp->device->channel->r_io, ATA_DRIVE, ATA_D_IBM | device);
  751: 	    adp = adp->device->channel->device[ATA_DEV(device)].driver;
  752: 	    DELAY(1);
  753: 	}
  754:     }
  755:     adp->device->channel->status =
  756: 	ATA_INB(adp->device->channel->r_altio, ATA_ALTSTAT);
  757:  
  758:     /* do we have a SERVICE request from the drive ? */
  759:     if (adp->flags & AD_F_TAG_ENABLED &&
  760: 	adp->outstanding > 0 &&
  761: 	adp->device->channel->status & ATA_S_SERVICE) {
  762: 	struct ad_request *request;
  763: 	int tag;
  764: 
  765: 	/* check for error */
  766: 	if (adp->device->channel->status & ATA_S_ERROR) {
  767: 	    ata_prtdev(adp->device, "Oops! controller says s=0x%02x e=0x%02x\n",
  768: 		       adp->device->channel->status,
  769: 		       adp->device->channel->error);
  770: 	    ad_invalidatequeue(adp, NULL);
  771: 	    return ATA_OP_FINISHED;
  772: 	}
  773: 
  774: 	/* issue SERVICE cmd */
  775: 	if (ata_command(adp->device, ATA_C_SERVICE, 0, 0, 0, ATA_IMMEDIATE)) {
  776: 	    ata_prtdev(adp->device, "problem executing SERVICE cmd\n");
  777: 	    ad_invalidatequeue(adp, NULL);
  778: 	    return ATA_OP_FINISHED;
  779: 	}
  780: 
  781: 	/* setup the transfer environment when ready */
  782: 	if (ata_wait(adp->device, ATA_S_READY)) {
  783: 	    ata_prtdev(adp->device, "SERVICE timeout tag=%d s=%02x e=%02x\n",
  784: 		       ATA_INB(adp->device->channel->r_io, ATA_COUNT) >> 3,
  785: 		       adp->device->channel->status,
  786: 		       adp->device->channel->error);
  787: 	    ad_invalidatequeue(adp, NULL);
  788: 	    return ATA_OP_FINISHED;
  789: 	}
  790: 	tag = ATA_INB(adp->device->channel->r_io, ATA_COUNT) >> 3;
  791: 	if (!(request = adp->tags[tag])) {
  792: 	    ata_prtdev(adp->device, "no request for tag=%d\n", tag);	
  793: 	    ad_invalidatequeue(adp, NULL);
  794: 	    return ATA_OP_FINISHED;
  795: 	}
  796: 	ATA_FORCELOCK_CH(adp->device->channel, ATA_ACTIVE_ATA);
  797: 	adp->device->channel->running = request;
  798: 	request->serv++;
  799: 
  800: 	/* start DMA transfer when ready */
  801: 	if (ata_wait(adp->device, ATA_S_READY | ATA_S_DRQ)) {
  802: 	    ata_prtdev(adp->device, "timeout starting DMA s=%02x e=%02x\n",
  803: 		       adp->device->channel->status,
  804: 		       adp->device->channel->error);
  805: 	    ad_invalidatequeue(adp, NULL);
  806: 	    return ATA_OP_FINISHED;
  807: 	}
  808: 	ata_dmastart(adp->device->channel, adp->device->unit,
  809: 		     request->dmatab, request->flags & ADR_F_READ);
  810: 	return ATA_OP_CONTINUES;
  811:     }
  812:     return ATA_OP_FINISHED;
  813: }
  814: 
  815: static void
  816: ad_free(struct ad_request *request)
  817: {
  818:     int s = splbio();
  819: 
  820:     if (request->dmatab)
  821: 	ata_dmafree(request->softc->device->channel, request->dmatab);
  822:     request->softc->tags[request->tag] = NULL;
  823:     mpipe_free(&request->softc->device->channel->req_mpipe, request);
  824:     splx(s);
  825: }
  826: 
  827: static void
  828: ad_invalidatequeue(struct ad_softc *adp, struct ad_request *request)
  829: {
  830:     /* if tags used invalidate all other tagged transfers */
  831:     if (adp->flags & AD_F_TAG_ENABLED) {
  832: 	struct ad_request *tmpreq;
  833: 	int tag;
  834: 
  835: 	ata_prtdev(adp->device, "invalidating queued requests\n");
  836: 	for (tag = 0; tag <= adp->num_tags; tag++) {
  837: 	    tmpreq = adp->tags[tag];
  838: 	    adp->tags[tag] = NULL;
  839: 	    if (tmpreq == request || tmpreq == NULL)
  840: 		continue;
  841: 	    untimeout((timeout_t *)ad_timeout, tmpreq, tmpreq->timeout_handle);
  842: 	    TAILQ_INSERT_HEAD(&adp->device->channel->ata_queue, tmpreq, chain);
  843: 	}
  844: 	if (ata_command(adp->device, ATA_C_NOP,
  845: 			0, 0, ATA_C_F_FLUSHQUEUE, ATA_WAIT_READY))
  846: 	    ata_prtdev(adp->device, "flush queue failed\n");
  847: 	adp->outstanding = 0;
  848:     }
  849: }
  850: 
  851: static int
  852: ad_tagsupported(struct ad_softc *adp)
  853: {
  854:     const char *good[] = {"IBM-DPTA", "IBM-DTLA", NULL};
  855:     int i = 0;
  856: 
  857:     switch (adp->device->channel->chiptype) {
  858:     case 0x4d33105a: /* Promises before TX2 doesn't work with tagged queuing */
  859:     case 0x4d38105a:
  860:     case 0x0d30105a:
  861:     case 0x4d30105a:  
  862: 	return 0;
  863:     }
  864: 
  865:     /* check that drive does DMA, has tags enabled, and is one we know works */
  866:     if (adp->device->mode >= ATA_DMA && adp->device->param->support.queued && 
  867: 	adp->device->param->enabled.queued) {
  868: 	while (good[i] != NULL) {
  869: 	    if (!strncmp(adp->device->param->model, good[i], strlen(good[i])))
  870: 		return 1;
  871: 	    i++;
  872: 	}
  873: 	/* 
  874: 	 * check IBM's new obscure way of naming drives 
  875: 	 * we want "IC" (IBM CORP) and "AT" or "AV" (ATA interface)
  876: 	 * but doesn't care about the other info (size, capacity etc)
  877: 	 */
  878: 	if (!strncmp(adp->device->param->model, "IC", 2) &&
  879: 	    (!strncmp(adp->device->param->model + 8, "AT", 2) ||
  880: 	     !strncmp(adp->device->param->model + 8, "AV", 2)))
  881: 		return 1;
  882:     }
  883:     return 0;
  884: }
  885: 
  886: static void
  887: ad_timeout(struct ad_request *request)
  888: {
  889:     struct ad_softc *adp = request->softc;
  890: 
  891:     adp->device->channel->running = NULL;
  892:     ata_prtdev(adp->device, "%s command timeout tag=%d serv=%d - resetting\n",
  893: 	       (request->flags & ADR_F_READ) ? "READ" : "WRITE",
  894: 	       request->tag, request->serv);
  895: 
  896:     if (request->flags & ADR_F_DMA_USED) {
  897: 	ata_dmadone(adp->device->channel);
  898: 	ad_invalidatequeue(adp, request);
  899: 	if (request->retries == AD_MAX_RETRIES) {
  900: 	    ata_dmainit(adp->device->channel, adp->device->unit,
  901: 			ata_pmode(adp->device->param), -1, -1);
  902: 	    ata_prtdev(adp->device, "trying fallback to PIO mode\n");
  903: 	    request->retries = 0;
  904: 	}
  905:     }
  906: 
  907:     /* if retries still permit, reinject this request */
  908:     if (request->retries++ < AD_MAX_RETRIES) {
  909: 	TAILQ_INSERT_HEAD(&adp->device->channel->ata_queue, request, chain);
  910:     }
  911:     else {
  912: 	/* retries all used up, return error */
  913: 	request->bp->b_error = EIO;
  914: 	request->bp->b_flags |= B_ERROR;
  915: 	devstat_end_transaction_buf(&adp->stats, request->bp);
  916: 	biodone(request->bp);
  917: 	ad_free(request);
  918:     }
  919:     ata_reinit(adp->device->channel);
  920: }
  921: 
  922: void
  923: ad_reinit(struct ata_device *atadev)
  924: {
  925:     struct ad_softc *adp = atadev->driver;
  926: 
  927:     /* reinit disk parameters */
  928:     ad_invalidatequeue(atadev->driver, NULL);
  929:     ata_command(atadev, ATA_C_SET_MULTI, 0,
  930: 		adp->transfersize / DEV_BSIZE, 0, ATA_WAIT_READY);
  931:     if (adp->device->mode >= ATA_DMA)
  932: 	ata_dmainit(atadev->channel, atadev->unit,
  933: 		    ata_pmode(adp->device->param),
  934: 		    ata_wmode(adp->device->param),
  935: 		    ata_umode(adp->device->param));
  936:     else
  937: 	ata_dmainit(atadev->channel, atadev->unit,
  938: 		    ata_pmode(adp->device->param), -1, -1);
  939: }
  940: 
  941: void
  942: ad_print(struct ad_softc *adp) 
  943: {
  944:     if (bootverbose) {
  945: 	ata_prtdev(adp->device, "<%.40s/%.8s> ATA-%d disk at ata%d-%s\n", 
  946: 		   adp->device->param->model, adp->device->param->revision,
  947: 		   ad_version(adp->device->param->version_major), 
  948: 		   device_get_unit(adp->device->channel->dev),
  949: 		   (adp->device->unit == ATA_MASTER) ? "master" : "slave");
  950: 
  951: 	ata_prtdev(adp->device,
  952: 		   "%lluMB (%llu sectors), %llu C, %u H, %u S, %u B\n",
  953: 		   (unsigned long long)(adp->total_secs /
  954: 		   ((1024L*1024L)/DEV_BSIZE)),
  955: 		   (unsigned long long) adp->total_secs,
  956: 		   (unsigned long long) (adp->total_secs /
  957: 		    (adp->heads * adp->sectors)),
  958: 		   adp->heads, adp->sectors, DEV_BSIZE);
  959: 
  960: 	ata_prtdev(adp->device, "%d secs/int, %d depth queue, %s%s\n", 
  961: 		   adp->transfersize / DEV_BSIZE, adp->num_tags + 1,
  962: 		   (adp->flags & AD_F_TAG_ENABLED) ? "tagged " : "",
  963: 		   ata_mode2str(adp->device->mode));
  964: 
  965: 	ata_prtdev(adp->device, "piomode=%d dmamode=%d udmamode=%d cblid=%d\n",
  966: 		   ata_pmode(adp->device->param), ata_wmode(adp->device->param),
  967: 		   ata_umode(adp->device->param), 
  968: 		   adp->device->param->hwres_cblid);
  969: 
  970:     }
  971:     else
  972: 	ata_prtdev(adp->device,"%lluMB <%.40s> [%lld/%d/%d] at ata%d-%s %s%s\n",
  973: 		   (unsigned long long)(adp->total_secs /
  974: 		   ((1024L * 1024L) / DEV_BSIZE)),
  975: 		   adp->device->param->model,
  976: 		   (unsigned long long)(adp->total_secs /
  977: 		    (adp->heads*adp->sectors)),
  978: 		   adp->heads, adp->sectors,
  979: 		   device_get_unit(adp->device->channel->dev),
  980: 		   (adp->device->unit == ATA_MASTER) ? "master" : "slave",
  981: 		   (adp->flags & AD_F_TAG_ENABLED) ? "tagged " : "",
  982: 		   ata_mode2str(adp->device->mode));
  983: }
  984: 
  985: static int
  986: ad_version(u_int16_t version)
  987: {
  988:     int bit;
  989: 
  990:     if (version == 0xffff)
  991: 	return 0;
  992:     for (bit = 15; bit >= 0; bit--)
  993: 	if (version & (1<<bit))
  994: 	    return bit;
  995:     return 0;
  996: }