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Date: Mon, 7 Jan 2008 18:32:22 -0800 From: akepner@....com To: Tony Luck <tony.luck@...el.com>, Grant Grundler <grundler@...isc-linux.org>, Jesse Barnes <jbarnes@...tuousgeek.org>, Jes Sorensen <jes@....com>, Randy Dunlap <randy.dunlap@...cle.com>, Roland Dreier <rdreier@...co.com>, James Bottomley <James.Bottomley@...eleye.com>, David Miller <davem@...emloft.net>, Muli Ben-Yehuda <muli@...ibm.com> Cc: linux-kernel@...r.kernel.org Subject: [RFC/PARTIAL PATCH 0/3] dma: passing "attributes" to dma_map_* routines The following patchset allows additional "attributes" to be passed to dma_map_*/dma_unmap_* implementations. (The reason why this is useful/necessary has been mentioned several times, most recently here: http://marc.info/?l=linux-kernel&m=119258541412724&w=2.) This is incomplete in that only ia64 and x86_64 are supported - the purpose is mainly to give us something specific to discuss. The approach here is to change the dma_map_* interface so that the last argument is an u32 which encodes the direction of the dma and, optionally, other attributes. Changing the interface is a bit intrusive, but callers of dma_map_* don't need to be modified. There are 3 patches: [1/3] dma: create linux/dma-direction.h [2/3] dma: ia64/sn2 allow "attributes" to be used by dma_map_* [2/3] dma: x86_64 allow "attributes" to be used by dma_map_* -- Arthur -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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