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authorScott Long <scottl@FreeBSD.org>2004-07-03 18:18:36 +0000
committerScott Long <scottl@FreeBSD.org>2004-07-03 18:18:36 +0000
commitb5243429417437665b6b4e7b982513985282becf (patch)
treeb5d0c1a71b8701748b8b1032b7fa726e1ba4a577 /share/man/man4/man4.i386/spkr.4
parentcf107c1d1a3285f0ed4d5524f7d58243f64325d4 (diff)
downloadsrc-b5243429417437665b6b4e7b982513985282becf.tar.gz
src-b5243429417437665b6b4e7b982513985282becf.zip
Commit the first of half of changes that allow busdma to transparently
honor the alignment and boundary constraints in the dma tag when loading buffers. Previously, these constraints were only honored when allocating memory via bus_dmamem_alloc(). Now, bus_dmamap_load() will automatically use bounce buffers when needed. Also add a set of sysctls to monitor the global busdma stats. These are: hw.busdma.free_bpages hw.busdma.reserved_bpages hw.busdma.active_bpages hw.busdma.total_bpages hw.busdma.total_bounced hw.busdma.total_deferred
Notes
Notes: svn path=/head/; revision=131529
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