From: Terje Bergstrom <tbergstrom-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
To: Alexandre Courbot <gnurou-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: "nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org"
<nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org>,
Ben Skeggs <bskeggs-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Subject: Re: [PATCH 2/6] instmem/gk20a: refer to IOMMU physical translation bit
Date: Mon, 20 Apr 2015 09:37:43 -0700 [thread overview]
Message-ID: <55352B57.4000202@nvidia.com> (raw)
In-Reply-To: <CAAVeFu+p=FFqMNTYNVo1DKnFWZ88_5osiTbiHQR=wQ6tJhHzBA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
On 04/20/2015 12:38 AM, Alexandre Courbot wrote:
> On Sat, Apr 18, 2015 at 12:14 AM, Terje Bergstrom <tbergstrom@nvidia.com> wrote:
>> Wouldn't that be just a more complicated way of expressing the same
>> thing?
> Right now we have r->offset |= BIT(priv->iommu_phys_addr_bit -
> priv->iommu_pgshift), which doesn't look much simpler. :)
One reason is that you're doing two things in the same bit operation.
The original address has already been shifted, so you're compensating
the shift, and you're setting bit 34.
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next prev parent reply other threads:[~2015-04-20 16:37 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-16 11:06 [PATCH 0/6] map big page by platform IOMMU Vince Hsu
[not found] ` <1429182379-31964-1-git-send-email-vinceh-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2015-04-16 11:06 ` [PATCH 1/6] platform: specify the IOMMU physical translation bit Vince Hsu
[not found] ` <1429182379-31964-2-git-send-email-vinceh-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2015-04-16 20:41 ` Terje Bergstrom
[not found] ` <55301E65.5000705-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2015-04-17 2:22 ` Vince Hsu
2015-04-17 6:26 ` Alexandre Courbot
[not found] ` <CAAVeFuL10UidtE4_Y2mYEYpWjDqXn-FQF3zJQv2eQDqg_QTJ1Q-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-04-17 7:07 ` Vince Hsu
2015-04-17 15:10 ` Terje Bergstrom
[not found] ` <55312257.8000606-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2015-04-20 7:37 ` Alexandre Courbot
[not found] ` <CAAVeFuKSY9AvtmjkVY7CApMex3Gq5L5cQ=suaERY5-gtAYai6A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-04-20 16:35 ` Terje Bergstrom
2015-04-16 11:06 ` [PATCH 2/6] instmem/gk20a: refer to " Vince Hsu
[not found] ` <1429182379-31964-3-git-send-email-vinceh-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2015-04-17 6:26 ` Alexandre Courbot
[not found] ` <CAAVeFuJqWuQeH1tbAdkVpocBAjq52GPv_O_yxd0X+7gSHjCoJw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-04-17 7:19 ` Vince Hsu
[not found] ` <5530B3F7.3000000-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2015-04-17 7:40 ` Alexandre Courbot
2015-04-17 15:14 ` Terje Bergstrom
[not found] ` <5531234C.8020806-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2015-04-20 7:38 ` Alexandre Courbot
[not found] ` <CAAVeFu+p=FFqMNTYNVo1DKnFWZ88_5osiTbiHQR=wQ6tJhHzBA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-04-20 16:37 ` Terje Bergstrom [this message]
2015-04-16 11:06 ` [PATCH 3/6] mmu: map small pages into big pages(s) by IOMMU if possible Vince Hsu
[not found] ` <1429182379-31964-4-git-send-email-vinceh-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2015-04-17 9:11 ` Alexandre Courbot
[not found] ` <CAAVeFuLSYGV8ghOQ26ubA9kvWHCPD2y+y_bJMLHv1V1Ab8NOYg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-04-17 15:37 ` Terje Bergstrom
[not found] ` <553128CA.40304-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2015-04-20 7:49 ` Alexandre Courbot
[not found] ` <CAAVeFuKc1szojynHrGM9TJrJsTK0RjRiO7i7uwxoVPAW=tZJrA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-04-20 11:51 ` Vince Hsu
[not found] ` <5534E83D.80304-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2015-04-20 11:55 ` Vince Hsu
2015-04-20 16:47 ` Terje Bergstrom
2015-04-16 11:06 ` [PATCH 4/6] drm: enable big page mapping for small pages when IOMMU is available Vince Hsu
[not found] ` <1429182379-31964-5-git-send-email-vinceh-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2015-04-17 6:26 ` Alexandre Courbot
[not found] ` <CAAVeFu+_zJ4DUwebhzpfA9uJroFEVrOBRqiXUuS9Gk04hVA88A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-04-17 7:28 ` Vince Hsu
[not found] ` <5530B603.9010703-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2015-04-17 7:33 ` Alexandre Courbot
2015-04-17 15:24 ` Terje Bergstrom
2015-04-16 11:06 ` [PATCH 5/6] mmu: gf100: share most of functions with GK20A Vince Hsu
[not found] ` <1429182379-31964-6-git-send-email-vinceh-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2015-04-17 6:27 ` Alexandre Courbot
[not found] ` <CAAVeFuJay4TNdOwEorver+-WiYCLJ21BXcRgCBv1aush_i1wbg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-04-17 7:30 ` Vince Hsu
2015-04-16 11:06 ` [PATCH 6/6] mmu: gk20a: implement IOMMU mapping for big pages Vince Hsu
[not found] ` <1429182379-31964-7-git-send-email-vinceh-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2015-04-16 19:31 ` Ilia Mirkin
[not found] ` <CAKb7UvhEuNSYshiP+kt66zHfsmB=Edy+t7HLs2j_+-hvzzkdMQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-04-16 19:55 ` Terje Bergstrom
[not found] ` <553013A4.1020700-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2015-04-16 20:01 ` Ilia Mirkin
2015-04-17 6:25 ` [PATCH 0/6] map big page by platform IOMMU Alexandre Courbot
[not found] ` <CAAVeFuJLRo1XYum3FZBhO5=5u63KLUY_tr0wk=TPxWutvCdL8A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-04-17 7:35 ` Vince Hsu
[not found] ` <5530B7D3.60700-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2015-04-17 7:37 ` Alexandre Courbot
[not found] ` <CAAVeFuLdr7h29G6_1XGV8kTag=m4Spe_R9Aog38eRs9gAbgdVg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-04-17 7:42 ` Vince Hsu
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