[PATCH 0/2] pxa3xx: Data buffer dynamic allocation

Ezequiel Garcia ezequiel.garcia at free-electrons.com
Wed Oct 9 04:48:04 PDT 2013

On Fri, Oct 04, 2013 at 03:30:36PM -0300, Ezequiel Garcia wrote:
> As part of my work to support the NAND controllers in Armada 370/XP SoC
> here's a tiny set of patches to replace the currently data buffer allocation
> based in a hardcoded buffer size, into a dynamic scheme.
> We first use kmalloc to request a 256 bytes (big enough for the ONFI paramater
> page) and then re-allocate (either with kmalloc or using DMA allocators) using
> the detected page size.
> The first patch is required to perform the initial NAND operations (READID
> and friends) using programmable I/O since the DMA buffers are not ready
> at such early stage.
> The second patch performs to actual dynamic allocation and it's exactly
> the same patch I sent a few weeks ago:
>   http://patchwork.ozlabs.org/patch/275982/
> Daniel: Can you test these two If they look fine we can add them now,
> being an improvement to the driver pxa3xx beyond the Armada 370/XP effort.

Daniel: sorry to bother, any luck testing this?

Brian: do you think the fix might be OK?

I'll include this in my future patchset for pxa3xx-nand, but if these
two look OK, I think we can just merge them now.

Ezequiel García, Free Electrons
Embedded Linux, Kernel and Android Engineering

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