From: Scott Wood <scottwood@freescale.com>
To: Kumar Gala <galak@kernel.crashing.org>
Cc: fujita.tomonori@lab.ntt.co.jp, linuxppc-dev@ozlabs.org
Subject: Re: [PATCH 4/5] powerpc: Add support for swiotlb on 32-bit
Date: Mon, 20 Apr 2009 15:16:57 -0500 [thread overview]
Message-ID: <49ECD839.3060408@freescale.com> (raw)
In-Reply-To: <AC7EE6C5-5487-4D70-B690-2F60BE974C92@kernel.crashing.org>
Kumar Gala wrote:
> I'm suggesting we do it one for FSL in fsl_soc.c, the 4xx guys can do it
> once, etc. Since the behavior desired is going to be a bit unique to
> SoCs/chipsets.
Perhaps we should have a dma_mask in platform/of_platform device
structs? The driver knows best how many bits it can shove into a DMA
address register, and it would let us avoid hardcoding 36 bits into this
code.
What other platform-specific behavior do you have in mind? Could we
supply a default implementation that platforms can override if they need
something weird, rather than duplicating it per soc family?
-Scott
next prev parent reply other threads:[~2009-04-20 20:17 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-20 16:26 [PATCH 0/5] SWIOTLB for ppc/mpc86xx Becky Bruce
2009-04-20 16:26 ` [PATCH 0/5] enable swiotlb on ppc/86xx Becky Bruce
2009-04-20 16:26 ` [PATCH 0/5] Allow swiotlb use on ppc/mpc86xx Becky Bruce
2009-04-20 16:26 ` [PATCH 1/5] powerpc: Use sg->dma_length in sg_dma_len() macro on 32-bit Becky Bruce
2009-04-20 16:26 ` [PATCH 2/5] powerpc: Add 36-bit device tree for mpc8641hpcn Becky Bruce
2009-04-20 16:26 ` [PATCH 3/5] powerpc: make dma_window_* in pci_controller struct avail on 32b Becky Bruce
2009-04-20 16:26 ` [PATCH 4/5] powerpc: Add support for swiotlb on 32-bit Becky Bruce
2009-04-20 16:26 ` [PATCH 5/5] powerpc: Add 86xx support for SWIOTLB Becky Bruce
2009-04-20 17:00 ` Kumar Gala
2009-04-20 17:58 ` Becky Bruce
2009-04-21 2:14 ` Michael Ellerman
2009-04-20 16:57 ` [PATCH 4/5] powerpc: Add support for swiotlb on 32-bit Kumar Gala
2009-04-20 18:03 ` Becky Bruce
2009-04-21 2:39 ` FUJITA Tomonori
2009-04-20 18:31 ` Kumar Gala
2009-04-20 19:06 ` Becky Bruce
2009-04-20 20:04 ` Kumar Gala
2009-04-20 20:16 ` Scott Wood [this message]
2009-04-20 16:58 ` [PATCH 3/5] powerpc: make dma_window_* in pci_controller struct avail on 32b Kumar Gala
2009-04-21 1:10 ` [PATCH 2/5] powerpc: Add 36-bit device tree for mpc8641hpcn David Gibson
2009-04-21 15:33 ` Becky Bruce
2009-04-22 1:26 ` David Gibson
2009-04-21 21:11 ` Kumar Gala
2009-04-20 20:06 ` [PATCH 1/5] powerpc: Use sg->dma_length in sg_dma_len() macro on 32-bit Kumar Gala
2009-04-21 2:27 ` FUJITA Tomonori
2009-04-21 15:23 ` Becky Bruce
2009-04-20 16:29 ` [PATCH 0/5] Allow swiotlb use on ppc/mpc86xx Becky Bruce
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