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From: "joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org" <joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
To: Olav Haugan <ohaugan-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
Cc: "laurent.pinchart+renesas-ryLnwIuWjnjg/C1BVhZhaw@public.gmane.org"
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	<linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org>
Subject: Re: [PATCH v5 1/1] iommu-api: Add map_sg/unmap_sg functions
Date: Mon, 18 Aug 2014 16:07:30 +0200	[thread overview]
Message-ID: <20140818140730.GC9809@8bytes.org> (raw)
In-Reply-To: <53EA472B.3020900-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>

On Tue, Aug 12, 2014 at 09:56:11AM -0700, Olav Haugan wrote:
> On 8/12/2014 3:48 AM, Rob Clark wrote:
> > iirc, one plan for 'flags' was some sort of DONT_FLUSH_TLB flag for
> > drivers which wanted to map/unmap N buffers with a single flush at the
> > end.  There might have been some other usages envisioned.
> 
> Yes, that was the original intent of the flags for now. I am sure we can
> find other uses for this in the future.

Do you have anything else in mind already besides the DONT_FLUSH_TLB
flag?

How is the IOTLB supposed to be flushed when this flag is used?


	Joerg

WARNING: multiple messages have this Message-ID (diff)
From: joro@8bytes.org (joro at 8bytes.org)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v5 1/1] iommu-api: Add map_sg/unmap_sg functions
Date: Mon, 18 Aug 2014 16:07:30 +0200	[thread overview]
Message-ID: <20140818140730.GC9809@8bytes.org> (raw)
In-Reply-To: <53EA472B.3020900@codeaurora.org>

On Tue, Aug 12, 2014 at 09:56:11AM -0700, Olav Haugan wrote:
> On 8/12/2014 3:48 AM, Rob Clark wrote:
> > iirc, one plan for 'flags' was some sort of DONT_FLUSH_TLB flag for
> > drivers which wanted to map/unmap N buffers with a single flush at the
> > end.  There might have been some other usages envisioned.
> 
> Yes, that was the original intent of the flags for now. I am sure we can
> find other uses for this in the future.

Do you have anything else in mind already besides the DONT_FLUSH_TLB
flag?

How is the IOTLB supposed to be flushed when this flag is used?


	Joerg

  parent reply	other threads:[~2014-08-18 14:07 UTC|newest]

Thread overview: 58+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-08-11 22:45 [PATCH v5 0/1] Add iommu map_sg/unmap_sg API Olav Haugan
2014-08-11 22:45 ` Olav Haugan
2014-08-11 22:45 ` [PATCH v5 1/1] iommu-api: Add map_sg/unmap_sg functions Olav Haugan
2014-08-11 22:45   ` Olav Haugan
     [not found]   ` <1407797150-515-2-git-send-email-ohaugan-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2014-08-12  1:35     ` Konrad Rzeszutek Wilk
2014-08-12  1:35       ` Konrad Rzeszutek Wilk
     [not found]       ` <20140812013559.GA25121-0iZWjJA6G8GSPmnEAIUT9EEOCMrvLtNR@public.gmane.org>
2014-08-12 16:53         ` Olav Haugan
2014-08-12 16:53           ` Olav Haugan
2014-08-12  1:51     ` Hiroshi Doyu
2014-08-12  1:51       ` Hiroshi Doyu
2014-08-12 10:48       ` Rob Clark
2014-08-12 10:48         ` Rob Clark
2014-08-12 16:56         ` Olav Haugan
2014-08-12 16:56           ` Olav Haugan
     [not found]           ` <53EA472B.3020900-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2014-08-18 14:07             ` joro-zLv9SwRftAIdnm+yROfE0A [this message]
2014-08-18 14:07               ` joro at 8bytes.org
     [not found]               ` <20140818140730.GC9809-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2014-08-18 18:32                 ` Rob Clark
2014-08-18 18:32                   ` Rob Clark
     [not found]                   ` <CAF6AEGtGmAQjMc5W5a6x5QiyUc8v0XHcsNAFe65Znc=DDKPS+w-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-08-18 20:48                     ` Olav Haugan
2014-08-18 20:48                       ` Olav Haugan
     [not found]                       ` <53F266AE.40303-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2014-08-18 21:26                         ` joro-zLv9SwRftAIdnm+yROfE0A
2014-08-18 21:26                           ` joro at 8bytes.org
     [not found]                           ` <20140818212627.GI9809-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2014-08-18 21:32                             ` Olav Haugan
2014-08-18 21:32                               ` Olav Haugan
2014-08-12 16:55     ` Laurent Pinchart
2014-08-12 16:55       ` Laurent Pinchart
2014-08-12 17:10       ` Olav Haugan
2014-08-12 17:10         ` Olav Haugan
2014-08-18 21:55     ` Joerg Roedel
2014-08-18 21:55       ` Joerg Roedel
2014-08-18 22:47       ` Olav Haugan
2014-08-18 22:47         ` Olav Haugan
     [not found]         ` <53F2829C.2040809-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2014-08-19 11:59           ` Joerg Roedel
2014-08-19 11:59             ` Joerg Roedel
     [not found]             ` <20140819115954.GC16329-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2014-08-19 16:11               ` Laurent Pinchart
2014-08-19 16:11                 ` Laurent Pinchart
2014-08-19 18:40                 ` Olav Haugan
2014-08-19 18:40                   ` Olav Haugan
     [not found]                   ` <53F39A18.70409-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2014-08-19 20:52                     ` Laurent Pinchart
2014-08-19 20:52                       ` Laurent Pinchart
2014-08-20  5:21                       ` Thierry Reding
2014-08-20  5:21                         ` Thierry Reding
2014-08-20 13:02                       ` Konrad Rzeszutek Wilk
2014-08-20 13:02                         ` Konrad Rzeszutek Wilk
     [not found]                         ` <20140820130250.GA3120-0iZWjJA6G8GSPmnEAIUT9EEOCMrvLtNR@public.gmane.org>
2014-08-20 14:15                           ` Laurent Pinchart
2014-08-20 14:15                             ` Laurent Pinchart
2014-08-19 18:37               ` Olav Haugan
2014-08-19 18:37                 ` Olav Haugan
2014-09-25 17:01     ` Joerg Roedel
2014-09-25 17:01       ` Joerg Roedel
     [not found]       ` <20140925170108.GE8306-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2014-10-06 19:02         ` Olav Haugan
2014-10-06 19:02           ` Olav Haugan
2014-10-15  9:16           ` Thierry Reding
2014-10-15  9:16             ` Thierry Reding
2014-10-16 17:23             ` Olav Haugan
2014-10-16 17:23               ` Olav Haugan
2014-10-17  9:09               ` Joerg Roedel
2014-10-17  9:09                 ` Joerg Roedel

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