From: Francois Romieu <romieu@cogenit.fr>
To: "MEHTA,HIREN (A-SanJose,ex1)" <hiren_mehta@agilent.com>
Cc: "'linux-kernel@vger.kernel.org'" <linux-kernel@vger.kernel.org>
Subject: Re: pci_alloc_consistent question
Date: Fri, 19 Oct 2001 20:51:31 +0200 [thread overview]
Message-ID: <20011019205131.B14409@se1.cogenit.fr> (raw)
In-Reply-To: <01A7DAF31F93D511AEE300D0B706ED9208E4A1@axcs13.cos.agilent.com>
In-Reply-To: <01A7DAF31F93D511AEE300D0B706ED9208E4A1@axcs13.cos.agilent.com>; from hiren_mehta@agilent.com on Fri, Oct 19, 2001 at 12:32:19PM -0600
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
next prev parent reply other threads:[~2001-10-19 18:51 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-10-19 18:32 pci_alloc_consistent question MEHTA,HIREN (A-SanJose,ex1)
2001-10-19 18:51 ` Francois Romieu [this message]
2001-10-19 20:57 ` Ralf Baechle
2001-10-19 21:37 ` [PATCH] various Config.in fixes James Simmons
-- strict thread matches above, loose matches on Subject: below --
2001-10-19 21:24 pci_alloc_consistent question MEHTA,HIREN (A-SanJose,ex1)
2001-10-19 21:37 ` Jeff Garzik
2001-10-19 21:59 ` Ralf Baechle
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