From: art <art@sigrand.ru>
To: linux-mips@linux-mips.org
Subject: Socket buffer allocation outside DMA-able memory
Date: Fri, 2 Jun 2006 20:26:16 +0700 [thread overview]
Message-ID: <6851.060602@sigrand.ru> (raw)
Hello all!
I work with ADM5120 chip. it has embedded switch.
Switch descriptor has 25-bit dma addres field - so addressible only
32Mb!
My system has 64Mb memory. But I have to set 32Mb to make it work!
I thought that setting DMA mask can help. So in
/arch/mips/adm5120/setup.c i make:
static struct platform_device adm5120hcd_device = {
.name = "adm5120-hcd",
.id = -1,
.dev = {
.dma_mask = &hcd_dmamask,
.coherent_dma_mask = 0x01ffffff,
},
.num_resources = ARRAY_SIZE(adm5120_hcd_resources),
.resource = adm5120_hcd_resources,
};
But It is wrong, because dev_alloc_skb dont know to which device it
allocates buffer!
How to tell kernel allocate skbuffers in less then 32Mb addrspace whet
system has 64Mb?
--
Best regards,
art mailto:art@sigrand.ru
next reply other threads:[~2006-06-02 13:26 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-02 13:26 art [this message]
2006-06-06 12:37 ` Socket buffer allocation outside DMA-able memory ashley jones
2006-06-07 3:48 ` Re[2]: " art
2006-06-07 5:17 ` ashley jones
2006-06-07 7:37 ` Re[4]: " art
-- strict thread matches above, loose matches on Subject: below --
2006-06-06 13:33 Zhan, Rongkai
2006-06-06 13:33 ` Zhan, Rongkai
2006-06-06 14:02 Zhan, Rongkai
2006-06-06 14:02 ` Zhan, Rongkai
[not found] ` <10452.060607@sigrand.ru>
2006-06-07 4:11 ` Mark.Zhan
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