From: Will Deacon <will.deacon-5wv7dgnIgG8@public.gmane.org>
To: Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>
Cc: Joerg Roedel <jroedel-l3A5Bk7waGM@public.gmane.org>,
"iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org"
<iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org>,
Thierry Reding
<thierry.reding-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Laurent Pinchart
<laurent.pinchart-ryLnwIuWjnjg/C1BVhZhaw@public.gmane.org>,
Varun Sethi <Varun.Sethi-KZfg59tc24xl57MIdRCFDg@public.gmane.org>,
David Woodhouse <dwmw2-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>,
"linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org"
<linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org>
Subject: Re: [PATCH v6 6/8] dma-mapping: detect and configure IOMMU in of_dma_configure
Date: Wed, 7 Jan 2015 18:57:05 +0000 [thread overview]
Message-ID: <20150107185704.GV7485@arm.com> (raw)
In-Reply-To: <7693528.krAZff0s6I@wuerfel>
Hi Arnd,
Sorry for the delay on this, I had to do a bit of digging.
On Mon, Dec 22, 2014 at 01:36:01PM +0000, Arnd Bergmann wrote:
> Do you think it's possible that we might have to deal with a single PCI host
> that is connected two different SMMU instances for the purposes of extending
> the StreamID space from 15 to 16 bits? I think we would have trouble
> expressing this with the current syntax.
Unfortunately, this sounds like something we may well have to support.
Whilst the SMMUv2 architecture did grow a late extension to support 16-bit
StreamIDs, that may have been too late for all silicon vendors and, as such,
I'm not confident that such systems will present a single software interface
for their SMMU.
Will
WARNING: multiple messages have this Message-ID (diff)
From: will.deacon@arm.com (Will Deacon)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v6 6/8] dma-mapping: detect and configure IOMMU in of_dma_configure
Date: Wed, 7 Jan 2015 18:57:05 +0000 [thread overview]
Message-ID: <20150107185704.GV7485@arm.com> (raw)
In-Reply-To: <7693528.krAZff0s6I@wuerfel>
Hi Arnd,
Sorry for the delay on this, I had to do a bit of digging.
On Mon, Dec 22, 2014 at 01:36:01PM +0000, Arnd Bergmann wrote:
> Do you think it's possible that we might have to deal with a single PCI host
> that is connected two different SMMU instances for the purposes of extending
> the StreamID space from 15 to 16 bits? I think we would have trouble
> expressing this with the current syntax.
Unfortunately, this sounds like something we may well have to support.
Whilst the SMMUv2 architecture did grow a late extension to support 16-bit
StreamIDs, that may have been too late for all silicon vendors and, as such,
I'm not confident that such systems will present a single software interface
for their SMMU.
Will
next prev parent reply other threads:[~2015-01-07 18:57 UTC|newest]
Thread overview: 220+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-01 16:57 [PATCH v6 0/8] Introduce automatic DMA configuration for IOMMU masters Will Deacon
2014-12-01 16:57 ` Will Deacon
[not found] ` <1417453034-21379-1-git-send-email-will.deacon-5wv7dgnIgG8@public.gmane.org>
2014-12-01 16:57 ` [PATCH v6 1/8] iommu: provide early initialisation hook for IOMMU drivers Will Deacon
2014-12-01 16:57 ` Will Deacon
[not found] ` <1417453034-21379-2-git-send-email-will.deacon-5wv7dgnIgG8@public.gmane.org>
2014-12-01 23:54 ` Rob Herring
2014-12-01 23:54 ` Rob Herring
[not found] ` <CAL_JsqKHvh9KSTYrrs1Pts5Kg=8dA1V6NiW57_2vdDH173qQGg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-12-02 9:23 ` Marek Szyprowski
2014-12-02 9:23 ` Marek Szyprowski
[not found] ` <547D84F4.8030204-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
2014-12-02 9:36 ` Arnd Bergmann
2014-12-02 9:36 ` Arnd Bergmann
2014-12-02 9:43 ` Will Deacon
2014-12-02 9:43 ` Will Deacon
2014-12-02 12:05 ` Thierry Reding
2014-12-02 12:05 ` Thierry Reding
2014-12-02 14:16 ` Grant Likely
2014-12-02 14:16 ` Grant Likely
[not found] ` <CACxGe6vyMkyE9ZRj_FQzi19ESEo7OV_RQoVV65xBYpdQV8cRGQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-12-03 19:57 ` Arnd Bergmann
2014-12-03 19:57 ` Arnd Bergmann
2014-12-04 9:49 ` Will Deacon
2014-12-04 9:49 ` Will Deacon
[not found] ` <20141204094953.GA13224-5wv7dgnIgG8@public.gmane.org>
2014-12-04 10:10 ` Arnd Bergmann
2014-12-04 10:10 ` Arnd Bergmann
2014-12-04 10:21 ` Will Deacon
2014-12-04 10:21 ` Will Deacon
[not found] ` <20141204102127.GF13224-5wv7dgnIgG8@public.gmane.org>
2014-12-04 11:19 ` Arnd Bergmann
2014-12-04 11:19 ` Arnd Bergmann
2014-12-04 11:25 ` Grant Likely
2014-12-04 11:25 ` Grant Likely
[not found] ` <CACxGe6v4ZVHHGcc3Lhp8+FgKakyCkJFRAT2ufj-3DGWa=wmGkA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-12-04 11:52 ` Will Deacon
2014-12-04 11:52 ` Will Deacon
[not found] ` <20141204115254.GF14519-5wv7dgnIgG8@public.gmane.org>
2014-12-04 12:43 ` Grant Likely
2014-12-04 12:43 ` Grant Likely
2014-12-04 12:26 ` Robin Murphy
2014-12-04 12:26 ` Robin Murphy
[not found] ` <54805312.6000402-5wv7dgnIgG8@public.gmane.org>
2014-12-04 12:42 ` Grant Likely
2014-12-04 12:42 ` Grant Likely
[not found] ` <CACxGe6uR5J4Cjdh_xYhBPoQRgeYwHPv5=AnuRmQKSD3yZrMK9Q-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-12-04 13:43 ` Robin Murphy
2014-12-04 13:43 ` Robin Murphy
[not found] ` <54806504.20507-5wv7dgnIgG8@public.gmane.org>
2014-12-04 13:58 ` Grant Likely
2014-12-04 13:58 ` Grant Likely
2014-12-04 14:49 ` Thierry Reding
2014-12-04 14:49 ` Thierry Reding
[not found] ` <20141204144925.GB31464-AwZRO8vwLAwmlAP/+Wk3EA@public.gmane.org>
2014-12-04 17:42 ` Robin Murphy
2014-12-04 17:42 ` Robin Murphy
[not found] ` <54809D09.2050406-5wv7dgnIgG8@public.gmane.org>
2014-12-04 17:58 ` Grant Likely
2014-12-04 17:58 ` Grant Likely
[not found] ` <CACxGe6tpFHdP1-5NWiNVAqzXx-diN1xfRbu0AQDyVJ6AU_4RXg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-12-04 19:42 ` Robin Murphy
2014-12-04 19:42 ` Robin Murphy
[not found] ` <5480B924.2010205-5wv7dgnIgG8@public.gmane.org>
2014-12-05 12:10 ` Will Deacon
2014-12-05 12:10 ` Will Deacon
[not found] ` <20141205121037.GI1630-5wv7dgnIgG8@public.gmane.org>
2014-12-05 12:21 ` Arnd Bergmann
2014-12-05 12:21 ` Arnd Bergmann
2014-12-05 12:35 ` Robin Murphy
2014-12-05 12:35 ` Robin Murphy
[not found] ` <5481A688.4030606-5wv7dgnIgG8@public.gmane.org>
2014-12-05 13:06 ` Grant Likely
2014-12-05 13:06 ` Grant Likely
[not found] ` <CACxGe6vppOQj-hJnqEEtLwDuSr4bzcbTgEFj8=x4ULu=yxswpg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-12-05 13:18 ` Thierry Reding
2014-12-05 13:18 ` Thierry Reding
[not found] ` <20141205131815.GA18747-AwZRO8vwLAwmlAP/+Wk3EA@public.gmane.org>
2014-12-05 13:21 ` Grant Likely
2014-12-05 13:21 ` Grant Likely
[not found] ` <CACxGe6vqstoCBiJ7TLvhNt+40TUJRB2ORoRKKtorhM-ETHXu0A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-12-05 13:31 ` Thierry Reding
2014-12-05 13:31 ` Thierry Reding
2014-12-05 13:49 ` Marek Szyprowski
2014-12-05 13:49 ` Marek Szyprowski
2014-12-04 12:51 ` Arnd Bergmann
2014-12-04 12:51 ` Arnd Bergmann
2014-12-02 10:30 ` Pantelis Antoniou
2014-12-02 10:30 ` Pantelis Antoniou
2014-12-01 16:57 ` [PATCH v6 2/8] dma-mapping: replace set_arch_dma_coherent_ops with arch_setup_dma_ops Will Deacon
2014-12-01 16:57 ` Will Deacon
[not found] ` <1417453034-21379-3-git-send-email-will.deacon-5wv7dgnIgG8@public.gmane.org>
2014-12-01 22:58 ` Rob Herring
2014-12-01 22:58 ` Rob Herring
[not found] ` <CAL_JsqLtN3euwXHM4BzYxkXsgE=Dmn05aXzL+kr_8x23voneZA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-12-02 9:16 ` Arnd Bergmann
2014-12-02 9:16 ` Arnd Bergmann
2014-12-01 16:57 ` [PATCH v6 3/8] iommu: add new iommu_ops callback for adding an OF device Will Deacon
2014-12-01 16:57 ` Will Deacon
2014-12-01 16:57 ` [PATCH v6 4/8] iommu: provide helper function to configure an IOMMU for an of master Will Deacon
2014-12-01 16:57 ` Will Deacon
2014-12-01 16:57 ` [PATCH v6 5/8] iommu: fix initialization without 'add_device' callback Will Deacon
2014-12-01 16:57 ` Will Deacon
2014-12-01 16:57 ` [PATCH v6 6/8] dma-mapping: detect and configure IOMMU in of_dma_configure Will Deacon
2014-12-01 16:57 ` Will Deacon
[not found] ` <1417453034-21379-7-git-send-email-will.deacon-5wv7dgnIgG8@public.gmane.org>
2014-12-01 23:06 ` Rob Herring
2014-12-01 23:06 ` Rob Herring
2014-12-10 14:52 ` Rob Clark
2014-12-10 14:52 ` Rob Clark
[not found] ` <CAF6AEGs6dZauq1QxY_OqBPUs0xHYjjGTi+H7Vm-mNvJtmTAHRA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-12-10 15:08 ` Will Deacon
2014-12-10 15:08 ` Will Deacon
[not found] ` <20141210150853.GH23639-5wv7dgnIgG8@public.gmane.org>
2014-12-10 15:54 ` Robin Murphy
2014-12-10 15:54 ` Robin Murphy
[not found] ` <54886CA2.3040406-5wv7dgnIgG8@public.gmane.org>
2014-12-10 15:56 ` Laurent Pinchart
2014-12-10 15:56 ` Laurent Pinchart
2014-12-14 15:49 ` Laurent Pinchart
2014-12-14 15:49 ` Laurent Pinchart
2014-12-14 15:59 ` Laurent Pinchart
2014-12-14 15:59 ` Laurent Pinchart
2014-12-15 17:10 ` Will Deacon
2014-12-15 17:10 ` Will Deacon
2014-12-15 16:40 ` Will Deacon
2014-12-15 16:40 ` Will Deacon
[not found] ` <20141215164041.GN20738-5wv7dgnIgG8@public.gmane.org>
2014-12-15 17:16 ` Laurent Pinchart
2014-12-15 17:16 ` Laurent Pinchart
2014-12-15 18:09 ` Will Deacon
2014-12-15 18:09 ` Will Deacon
[not found] ` <20141215180933.GW20738-5wv7dgnIgG8@public.gmane.org>
2014-12-16 12:08 ` Arnd Bergmann
2014-12-16 12:08 ` Arnd Bergmann
2014-12-17 12:09 ` Will Deacon
2014-12-17 12:09 ` Will Deacon
[not found] ` <20141217120948.GB870-5wv7dgnIgG8@public.gmane.org>
2014-12-17 14:15 ` Arnd Bergmann
2014-12-17 14:15 ` Arnd Bergmann
2014-12-17 14:45 ` Will Deacon
2014-12-17 14:45 ` Will Deacon
2014-12-17 15:35 ` Arnd Bergmann
2014-12-17 15:35 ` Arnd Bergmann
2014-12-17 17:17 ` Will Deacon
2014-12-17 17:17 ` Will Deacon
[not found] ` <20141217171752.GB30307-5wv7dgnIgG8@public.gmane.org>
2014-12-17 19:48 ` Arnd Bergmann
2014-12-17 19:48 ` Arnd Bergmann
2014-12-21 10:04 ` Will Deacon
2014-12-21 10:04 ` Will Deacon
[not found] ` <20141221100451.GA23242-5wv7dgnIgG8@public.gmane.org>
2014-12-22 13:36 ` Arnd Bergmann
2014-12-22 13:36 ` Arnd Bergmann
2015-01-07 18:57 ` Will Deacon [this message]
2015-01-07 18:57 ` Will Deacon
[not found] ` <20150107185704.GV7485-5wv7dgnIgG8@public.gmane.org>
2015-01-07 19:29 ` Arnd Bergmann
2015-01-07 19:29 ` Arnd Bergmann
2015-01-08 10:53 ` Will Deacon
2015-01-08 10:53 ` Will Deacon
2014-12-17 14:27 ` Robin Murphy
2014-12-17 14:27 ` Robin Murphy
[not found] ` <549192D2.10008-5wv7dgnIgG8@public.gmane.org>
2014-12-17 15:01 ` Will Deacon
2014-12-17 15:01 ` Will Deacon
[not found] ` <20141217150158.GF870-5wv7dgnIgG8@public.gmane.org>
2014-12-17 15:38 ` Arnd Bergmann
2014-12-17 15:38 ` Arnd Bergmann
2014-12-17 17:20 ` Will Deacon
2014-12-17 17:20 ` Will Deacon
2014-12-17 0:05 ` Laurent Pinchart
2014-12-17 0:05 ` Laurent Pinchart
2014-12-14 15:51 ` Laurent Pinchart
2014-12-14 15:51 ` Laurent Pinchart
2014-12-15 11:32 ` Will Deacon
2014-12-15 11:32 ` Will Deacon
[not found] ` <20141215113252.GH20738-5wv7dgnIgG8@public.gmane.org>
2014-12-17 0:19 ` Laurent Pinchart
2014-12-17 0:19 ` Laurent Pinchart
2014-12-17 11:14 ` Will Deacon
2014-12-17 11:14 ` Will Deacon
2014-12-01 16:57 ` [PATCH v6 7/8] arm: call iommu_init before of_platform_populate Will Deacon
2014-12-01 16:57 ` Will Deacon
2014-12-01 16:57 ` [PATCH v6 8/8] arm: dma-mapping: plumb our iommu mapping ops into arch_setup_dma_ops Will Deacon
2014-12-01 16:57 ` Will Deacon
[not found] ` <1417453034-21379-9-git-send-email-will.deacon-5wv7dgnIgG8@public.gmane.org>
2015-01-14 9:00 ` Alexandre Courbot
2015-01-14 9:00 ` Alexandre Courbot
[not found] ` <54B63028.3090701-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2015-01-14 10:46 ` Will Deacon
2015-01-14 10:46 ` Will Deacon
2015-01-14 13:51 ` Heiko Stübner
2015-01-14 13:51 ` Heiko Stübner
2015-01-14 19:17 ` Will Deacon
2015-01-14 19:17 ` Will Deacon
[not found] ` <20150114191749.GL4050-5wv7dgnIgG8@public.gmane.org>
2015-01-15 8:30 ` Thierry Reding
2015-01-15 8:30 ` Thierry Reding
2015-01-15 11:13 ` Will Deacon
2015-01-15 11:13 ` Will Deacon
[not found] ` <20150114104610.GC4050-5wv7dgnIgG8@public.gmane.org>
2015-01-15 2:57 ` Alexandre Courbot
2015-01-15 2:57 ` Alexandre Courbot
2015-01-15 8:28 ` Thierry Reding
2015-01-15 8:28 ` Thierry Reding
2015-01-15 11:12 ` Will Deacon
2015-01-15 11:12 ` Will Deacon
[not found] ` <20150115111211.GF23475-5wv7dgnIgG8@public.gmane.org>
2015-01-15 23:18 ` Laurent Pinchart
2015-01-15 23:18 ` Laurent Pinchart
2015-01-18 6:54 ` Alexandre Courbot
2015-01-18 6:54 ` Alexandre Courbot
[not found] ` <54BB58AA.5070407-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2015-01-18 11:18 ` Laurent Pinchart
2015-01-18 11:18 ` Laurent Pinchart
2015-01-19 11:12 ` Will Deacon
2015-01-19 11:12 ` Will Deacon
[not found] ` <20150119111202.GD32131-5wv7dgnIgG8@public.gmane.org>
2015-01-19 11:34 ` Laurent Pinchart
2015-01-19 11:34 ` Laurent Pinchart
2015-01-19 12:31 ` Thierry Reding
2015-01-19 12:31 ` Thierry Reding
[not found] ` <20150119123058.GA7312-AwZRO8vwLAwmlAP/+Wk3EA@public.gmane.org>
2015-01-20 15:14 ` Laurent Pinchart
2015-01-20 15:14 ` Laurent Pinchart
2015-01-20 15:19 ` Will Deacon
2015-01-20 15:19 ` Will Deacon
[not found] ` <20150120151910.GD1549-5wv7dgnIgG8@public.gmane.org>
2015-01-20 15:21 ` Will Deacon
2015-01-20 15:21 ` Will Deacon
2015-01-20 15:35 ` Laurent Pinchart
2015-01-20 15:35 ` Laurent Pinchart
2015-01-19 12:43 ` Thierry Reding
2015-01-19 12:43 ` Thierry Reding
[not found] ` <20150119124305.GC7312-AwZRO8vwLAwmlAP/+Wk3EA@public.gmane.org>
2015-01-19 12:50 ` Will Deacon
2015-01-19 12:50 ` Will Deacon
[not found] ` <20150119125051.GI32131-5wv7dgnIgG8@public.gmane.org>
2015-01-19 13:36 ` Thierry Reding
2015-01-19 13:36 ` Thierry Reding
[not found] ` <20150119133633.GA23778-AwZRO8vwLAwmlAP/+Wk3EA@public.gmane.org>
2015-01-20 13:50 ` Laurent Pinchart
2015-01-20 13:50 ` Laurent Pinchart
2015-01-19 16:13 ` Arnd Bergmann
2015-01-19 16:13 ` Arnd Bergmann
2015-01-20 16:41 ` Laurent Pinchart
2015-01-20 16:41 ` Laurent Pinchart
2015-01-19 12:36 ` Thierry Reding
2015-01-19 12:36 ` Thierry Reding
[not found] ` <20150119123623.GB7312-AwZRO8vwLAwmlAP/+Wk3EA@public.gmane.org>
2015-01-19 15:52 ` Arnd Bergmann
2015-01-19 15:52 ` Arnd Bergmann
2015-01-19 16:21 ` Thierry Reding
2015-01-19 16:21 ` Thierry Reding
[not found] ` <20150119162111.GA7751-AwZRO8vwLAwmlAP/+Wk3EA@public.gmane.org>
2015-01-19 17:02 ` Arnd Bergmann
2015-01-19 17:02 ` Arnd Bergmann
2015-01-20 13:47 ` Laurent Pinchart
2015-01-20 13:47 ` Laurent Pinchart
2015-01-19 12:49 ` Thierry Reding
2015-01-19 12:49 ` Thierry Reding
[not found] ` <20150119124934.GD7312-AwZRO8vwLAwmlAP/+Wk3EA@public.gmane.org>
2015-01-20 14:05 ` Laurent Pinchart
2015-01-20 14:05 ` Laurent Pinchart
2014-12-05 7:12 ` [PATCH v6 0/8] Introduce automatic DMA configuration for IOMMU masters Olof Johansson
2014-12-05 7:12 ` Olof Johansson
[not found] ` <CAOesGMg9BpL3AyDjuAvH_H5fOm-uga+_CZuJZ5p8zpHpJLg0qA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-12-05 12:11 ` Will Deacon
2014-12-05 12:11 ` Will Deacon
2014-12-15 0:24 ` [PATCH/RFC] iommu/ipmmu-vmsa: Use DT-based instantiation Laurent Pinchart
2014-12-15 0:24 ` Laurent Pinchart
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