Author: mav
Date: Thu Dec 10 09:26:56 2009
New Revision: 200353
URL: http://svn.freebsd.org/changeset/base/200353
Log:
Limit maximum I/O size, depending on command set supported by device.
It is required to suppot non-LBA48 devices with MAXPHYS above 128K.
Same is done in ada(4).
Modified:
head/sys/dev/ata/ata-disk.c
Modified: head/sys/dev/ata/ata-disk.c
==============================================================================
--- head/sys/dev/ata/ata-disk.c Thu Dec 10 07:48:47 2009 (r200352)
+++ head/sys/dev/ata/ata-disk.c Thu Dec 10 09:26:56 2009 (r200353)
@@ -126,6 +126,10 @@ ad_attach(device_t dev)
adp->disk->d_name = "ad";
adp->disk->d_drv1 = dev;
adp->disk->d_maxsize = ch->dma.max_iosize ? ch->dma.max_iosize : DFLTPHYS;
+ if (atadev->param.support.command2 & ATA_SUPPORT_ADDRESS48)
+ adp->disk->d_maxsize = min(adp->disk->d_maxsize, 65536 * DEV_BSIZE);
+ else /* 28bit ATA command limit */
+ adp->disk->d_maxsize = min(adp->disk->d_maxsize, 256 * DEV_BSIZE);
adp->disk->d_sectorsize = DEV_BSIZE;
adp->disk->d_mediasize = DEV_BSIZE * (off_t)adp->total_secs;
adp->disk->d_fwsectors = adp->sectors;
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