From: Clemens Ladisch <clemens@ladisch.de>
To: Leon Woestenberg <leon.woestenberg@gmail.com>
Cc: Takashi Iwai <tiwai@suse.de>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
linux-pci@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: Re: mmap() implementation for pci_alloc_consistent() memory?
Date: Mon, 23 May 2011 10:30:16 +0200 [thread overview]
Message-ID: <4DDA1B18.3080201@ladisch.de> (raw)
In-Reply-To: <BANLkTi=P6WP-+BiqEwCRTxaNTqNHT988wA@mail.gmail.com>
Leon Woestenberg wrote:
> Having dma_mmap_coherent() there is good for one or two archs, but how
> can we built portable drivers if the others arch's are still missing?
Easy: Resolve all issues, implement it for all the other arches, and add
it to the official DMA API.
> How would dma_mmap_coherent() look like on x86?
X86 and some others are always coherent; just use vm_insert_page() or
remap_page_range().
Regards,
Clemens
WARNING: multiple messages have this Message-ID (diff)
From: Clemens Ladisch <clemens@ladisch.de>
To: Leon Woestenberg <leon.woestenberg@gmail.com>
Cc: Takashi Iwai <tiwai@suse.de>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
linux-pci@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: Re: mmap() implementation for pci_alloc_consistent() memory?
Date: Mon, 23 May 2011 10:30:16 +0200 [thread overview]
Message-ID: <4DDA1B18.3080201@ladisch.de> (raw)
In-Reply-To: <BANLkTi=P6WP-+BiqEwCRTxaNTqNHT988wA@mail.gmail.com>
Leon Woestenberg wrote:
> Having dma_mmap_coherent() there is good for one or two archs, but how
> can we built portable drivers if the others arch's are still missing?
Easy: Resolve all issues, implement it for all the other arches, and add
it to the official DMA API.
> How would dma_mmap_coherent() look like on x86?
X86 and some others are always coherent; just use vm_insert_page() or
remap_page_range().
Regards,
Clemens
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next prev parent reply other threads:[~2011-05-23 8:28 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-18 22:14 mmap() implementation for pci_alloc_consistent() memory? Leon Woestenberg
2011-05-18 22:14 ` Leon Woestenberg
2011-05-19 1:04 ` Leon Woestenberg
2011-05-19 1:04 ` Leon Woestenberg
2011-05-19 14:59 ` Konrad Rzeszutek Wilk
2011-05-19 14:59 ` Konrad Rzeszutek Wilk
2011-05-19 15:58 ` Clemens Ladisch
2011-05-19 15:58 ` Clemens Ladisch
2011-05-19 22:10 ` Leon Woestenberg
2011-05-19 22:10 ` Leon Woestenberg
2011-05-20 6:51 ` Clemens Ladisch
2011-05-20 6:51 ` Clemens Ladisch
2011-05-20 8:17 ` Takashi Iwai
2011-05-20 8:17 ` Takashi Iwai
2011-05-21 10:59 ` Leon Woestenberg
2011-05-21 10:59 ` Leon Woestenberg
2011-05-23 8:30 ` Clemens Ladisch [this message]
2011-05-23 8:30 ` Clemens Ladisch
2011-05-24 14:18 ` Leon Woestenberg
2011-05-24 14:18 ` Leon Woestenberg
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