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* I/OAT: I/OAT version 3.0 supportMaciej Sosnowski2008-07-221-7/+237
| | | | | | | | | | | | This patch adds to ioatdma and dca modules support for Intel I/OAT DMA engine ver.3 (aka CB3 device). The main features of I/OAT ver.3 are: * 8 single channel DMA devices (8 channels total) * 8 DCA providers, each can accept 2 requesters * 8-bit TAG values and 32-bit extended APIC IDs Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
* ioat_dca __iomem annotationsAl Viro2008-03-301-2/+2
| | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* I/OAT: Add support for version 2 of ioatdma deviceShannon Nelson2007-11-141-0/+164
| | | | | | | | | | | | | | | | Add support for version 2 of the ioatdma device. This device handles the descriptor chain and DCA services slightly differently: - Instead of moving the dma descriptors between a busy and an idle chain, this new version uses a single circular chain so that we don't have rewrite the next_descriptor pointers as we add new requests, and the device doesn't need to re-read the last descriptor. - The new device has the DCA tags defined internally instead of needing them defined statically. Signed-off-by: Shannon Nelson <shannon.nelson@intel.com> Cc: "Williams, Dan J" <dan.j.williams@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* I/OAT: clean up error handling and some print messagesShannon Nelson2007-10-181-6/+6
| | | | | | | | | | Make better use of dev_err(), and catch an error where the transaction creation might fail. Signed-off-by: Shannon Nelson <shannon.nelson@intel.com> Cc: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* I/OAT: Add DCA servicesShannon Nelson2007-10-161-0/+263
Add code to connect to the DCA driver and provide cpu tags for use by drivers that would like to use Direct Cache Access hints. [Adrian Bunk] Several Kconfig cleanup items [Andrew Morten, Chris Leech] Fix for using cpu_physical_id() even when built for uni-processor Signed-off-by: Shannon Nelson <shannon.nelson@intel.com> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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