From: Ralf Baechle <ralf@uni-koblenz.de>
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 22:57:45 +0200 [thread overview]
Message-ID: <20011019225745.B28818@dea.linux-mips.net> (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
On Fri, Oct 19, 2001 at 12:32:19PM -0600, MEHTA,HIREN (A-SanJose,ex1) wrote:
> Is there any limitation on the amount of contiguous dmaable memory that
> can be allocated using a single call to pci_alloc_consistent() ?
Entirely platform dependant. On some systems the total available DMA memory
for DMA may be as limited as 1mb, others have limits like 16mb yet other can
support the entire 32-bit address space for DMA. So in case of doubt be
conservative.
Ralf
next prev parent reply other threads:[~2001-10-19 20:57 UTC|newest]
Thread overview: 6+ 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
2001-10-19 20:57 ` Ralf Baechle [this message]
-- strict thread matches above, loose matches on Subject: below --
2001-10-19 21:24 MEHTA,HIREN (A-SanJose,ex1)
2001-10-19 21:37 ` Jeff Garzik
2001-10-19 21:59 ` Ralf Baechle
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