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PR/43274 CVS commit: src/sys/arch/sparc64/dev

The following reply was made to PR kern/43274; it has been noted by GNATS.

From: matthew green <>
Subject: PR/43274 CVS commit: src/sys/arch/sparc64/dev
Date: Thu, 17 Jun 2010 06:48:46 +0000

 Module Name:   src
 Committed By:  mrg
 Date:          Thu Jun 17 06:48:46 UTC 2010
 Modified Files:
        src/sys/arch/sparc64/dev: iommu.c
 Log Message:
 in iommu_remove() don't invalidate the IOMMU mapping.  for reasons not
 yet determined, some PCI devices (at least fxp(4) and re(4)) sometimes
 appear to perform DMA operations while this is happening, and we get
 uncorrectable DMA errors.  ideally, this "shouldn't happen", but none
 of the investigation so far has reveal the problem, and my source
 investigation of both opensolaris and linux show that their perform
 the invaliation when unmapping.
 "handles" PR#43274 as well as other issues...
 XXX: candidate for netbsd-5
 To generate a diff of this commit:
 cvs rdiff -u -r1.98 -r1.99 src/sys/arch/sparc64/dev/iommu.c
 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.

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