I/OAT: add verification for proper APICID_TAG_MAP setting by BIOS

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BIOS versions for systems with I/OAT ver.2 have been found
which fail to program APICID_TAG_MAP for DCA.
The ioatdma driver should recognize incorrectly set APICID_TAG_MAP
and disable DCA in that case.

Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

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Maciej Sosnowski 2009-02-26 11:04:23 +01:00 • committed by Dan Williams

parent 1d93e52eb4

commit 49bc46360d

1 changed files with 24 additions and 0 deletions

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drivers/dma/ioat_dca.c

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