Re: pci_alloc_consistent question

Francois Romieu (romieu@cogenit.fr)
Fri, 19 Oct 2001 20:51:31 +0200

MEHTA,HIREN (A-SanJose,ex1) <hiren_mehta@agilent.com> :
[...]
> Is there any limitation on the amount of contiguous dmaable memory that
> can be allocated using a single call to pci_alloc_consistent() ?

See comment in arch/i386/kernel/pci-dma.c for pc world:
/*
* Dynamic DMA mapping support.
*
* On i386 there is no hardware dynamic DMA address translation,
* so consistent alloc/free are merely page allocation/freeing.
[...]

It fails as __get_free_pages does.

-- 
Ueimor
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