From: "Gleb O. Raiko" <raiko@niisi.msk.ru>
To: Geoffrey Espin <espin@idiom.com>
Cc: linux-mips@oss.sgi.com
Subject: Re: kmalloc/pci_alloc and skbuff's
Date: Wed, 19 Dec 2001 12:05:23 +0300 [thread overview]
Message-ID: <3C205853.EE642541@niisi.msk.ru> (raw)
In-Reply-To: 20011218123848.A75986@idiom.com
Geoffrey Espin wrote:
>
> The Markham board (Korva/VR41xx variant) which I'm trying to get
> submitted, has a PCI problem. It doesn't allow a PCI device to
> see all the DRAM. DMA-able data must be in a special 4MB range,
> which is currently set at 0x01c00000 (the last 4MB of a 32MB
> system). SKB's must be allocated within this area for a
> (say, Ethernet) PCI device to access. There appears to be no way
> to tell kmalloc(), used in alloc_skb(), to allocate memory from
> any special address range.
>
What's wrong with GFP_DMA ? Doesn't it solve exactly this problem ?
Regards,
Gleb.
next prev parent reply other threads:[~2001-12-19 10:08 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-12-18 20:38 kmalloc/pci_alloc and skbuff's Geoffrey Espin
2001-12-19 9:05 ` Gleb O. Raiko [this message]
2001-12-19 17:09 ` James Simmons
2001-12-19 18:56 ` Geoffrey Espin
2001-12-19 19:12 ` Pete Popov
2001-12-19 19:53 ` Geoffrey Espin
2001-12-19 21:23 ` Pete Popov
2001-12-19 21:56 ` Geoffrey Espin
2001-12-19 22:06 ` Pete Popov
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