From: Mitchel Humpherys <mitchelh@codeaurora.org>
To: Yong Wu <yong.wu@mediatek.com>
Cc: Mark Rutland <mark.rutland@arm.com>,
devicetree@vger.kernel.org, srv_heupstream@mediatek.com,
Catalin Marinas <catalin.marinas@arm.com>,
Joerg Roedel <joro@8bytes.org>, Will Deacon <will.deacon@arm.com>,
linux-kernel@vger.kernel.org, Tomasz Figa <tfiga@google.com>,
iommu@lists.linux-foundation.org,
Rob Herring <robh+dt@kernel.org>,
Daniel Kurtz <djkurtz@google.com>,
Sasha Hauer <kernel@pengutronix.de>,
Matthias Brugger <matthias.bgg@gmail.com>,
linux-mediatek@lists.infradead.org,
Robin Murphy <robin.murphy@arm.com>,
linux-arm-kernel@lists.infradead.org,
Lucas Stach <l.stach@pengutronix.de>
Subject: Re: [PATCH 2/5] iommu/mediatek: Add mt8173 IOMMU driver
Date: Mon, 09 Mar 2015 09:57:45 -0700 [thread overview]
Message-ID: <vnkwwq2qrtva.fsf@mitchelh-linux.qualcomm.com> (raw)
In-Reply-To: <1425903386.13300.33.camel@mhfsdcap03> (Yong Wu's message of "Mon, 9 Mar 2015 20:16:26 +0800")
On Mon, Mar 09 2015 at 05:16:26 AM, Yong Wu <yong.wu@mediatek.com> wrote:
> Dear Mitchel,
> Thanks very much for your review.
>
> On Fri, 2015-03-06 at 09:15 -0800, Mitchel Humpherys wrote:
>> On Fri, Mar 06 2015 at 02:48:17 AM, <yong.wu@mediatek.com> wrote:
>> > From: Yong Wu <yong.wu@mediatek.com>
>> >
>> > This patch adds support for mediatek m4u (MultiMedia Memory Management Unit).
>> > Currently this only supports m4u gen 2 with 2 levels of page table on mt8173.
>>
>> [...]
>>
>> > +static int mtk_iommu_invalidate_tlb(const struct mtk_iommu_info *piommu,
>> > + int isinvall, unsigned int iova_start,
>> > + unsigned int iova_end)
>> > +{
>> > + void __iomem *m4u_base = piommu->m4u_base;
>> > + u32 val;
>> > + u64 start, end;
>> > +
>> > + start = sched_clock();
>> > +
>> > + if (!isinvall) {
>> > + iova_start = round_down(iova_start, SZ_4K);
>> > + iova_end = round_up(iova_end, SZ_4K);
>> > + }
>> > +
>> > + val = F_MMU_INV_EN_L2 | F_MMU_INV_EN_L1;
>> > +
>> > + writel(val, m4u_base + REG_INVLID_SEL);
>> > +
>> > + if (isinvall) {
>> > + writel(F_MMU_INV_ALL, m4u_base + REG_MMU_INVLD);
>> > + } else {
>> > + writel(iova_start, m4u_base + REG_MMU_INVLD_SA);
>> > + writel(iova_end, m4u_base + REG_MMU_INVLD_EA);
>> > + writel(F_MMU_INV_RANGE, m4u_base + REG_MMU_INVLD);
>> > +
>> > + while (!readl(m4u_base + REG_MMU_CPE_DONE)) {
>> > + end = sched_clock();
>> > + if (end - start >= 100000000ULL) {
>> > + dev_warn(piommu->dev, "invalid don't done\n");
>> > + writel(F_MMU_INV_ALL, m4u_base + REG_MMU_INVLD);
>> > + }
>> > + };
>>
>> Superfluous `;'. Also, maybe you should be using readl_poll_timeout?
> Thanks.
> For the "readl_poll_timeout", My base is 3.19-rc7 and robin's patch.
> it don't have this interface. I will try to add it in the next version.
Yeah it was merged in v4.0-rc1.
-Mitch
--
Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
next prev parent reply other threads:[~2015-03-09 16:57 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-06 10:48 [RFC PATCH 0/5] MT8173 IOMMU support yong.wu
2015-03-06 10:48 ` [PATCH 1/5] soc: mediatek: Add SMI driver yong.wu
2015-03-06 11:30 ` Paul Bolle
2015-03-09 11:57 ` Yong Wu
2015-03-09 17:59 ` Paul Bolle
2015-03-09 21:54 ` Arnd Bergmann
2015-03-10 6:17 ` Yingjoe Chen
2015-03-09 3:26 ` Yingjoe Chen
2015-03-09 21:56 ` Arnd Bergmann
2015-03-10 6:27 ` Yingjoe Chen
2015-03-10 9:05 ` Arnd Bergmann
2015-03-10 9:24 ` Lucas Stach
2015-03-09 11:03 ` Sascha Hauer
2015-03-06 10:48 ` [PATCH 2/5] iommu/mediatek: Add mt8173 IOMMU driver yong.wu
2015-03-06 10:58 ` Will Deacon
2015-03-09 12:11 ` Yong Wu
2015-03-17 15:14 ` Will Deacon
2015-03-06 17:15 ` Mitchel Humpherys
2015-03-09 12:16 ` Yong Wu
2015-03-09 16:57 ` Mitchel Humpherys [this message]
2015-03-08 4:12 ` Tomasz Figa
2015-03-12 14:16 ` Yong Wu
2015-03-09 8:24 ` Daniel Kurtz
2015-03-09 11:11 ` Tomasz Figa
2015-03-09 14:46 ` Yingjoe Chen
2015-03-09 17:00 ` Tomasz Figa
2015-03-10 3:41 ` Yingjoe Chen
2015-03-10 4:06 ` Tomasz Figa
2015-03-11 10:53 ` Tomasz Figa
2015-03-18 11:22 ` Yong Wu
2015-03-20 19:14 ` Robin Murphy
2015-04-14 6:50 ` Yong Wu
2015-03-27 9:41 ` Tomasz Figa
2015-04-14 6:31 ` Yong Wu
2015-04-15 2:20 ` Tomasz Figa
2015-04-15 7:06 ` Yong Wu
2015-04-15 7:41 ` Tomasz Figa
2015-04-29 6:23 ` Yong Wu
2015-03-06 10:48 ` [PATCH 3/5] dt-bindings: mediatek: Add smi dts binding yong.wu
2015-03-06 11:13 ` Mark Rutland
2015-03-09 12:55 ` Yong Wu
2015-04-14 9:07 ` Yong Wu
2015-04-14 10:06 ` Mark Rutland
2015-04-14 13:49 ` Yong Wu
2015-04-14 13:55 ` Yong Wu
2015-04-14 13:56 ` Mark Rutland
2015-03-06 14:48 ` Sergei Shtylyov
2015-03-09 12:32 ` Yong Wu
2015-03-06 10:48 ` [PATCH 4/5] dt-bindings: iommu: Add binding for mediatek IOMMU yong.wu
2015-03-06 11:21 ` Mark Rutland
2015-03-09 11:30 ` Yong Wu
2015-03-06 10:48 ` [PATCH 5/5] dts: mt8173: Add iommu/smi nodes for mt8173 yong.wu
2015-03-07 15:20 ` Daniel Kurtz
2015-03-09 12:18 ` Yong Wu
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=vnkwwq2qrtva.fsf@mitchelh-linux.qualcomm.com \
--to=mitchelh@codeaurora.org \
--cc=catalin.marinas@arm.com \
--cc=devicetree@vger.kernel.org \
--cc=djkurtz@google.com \
--cc=iommu@lists.linux-foundation.org \
--cc=joro@8bytes.org \
--cc=kernel@pengutronix.de \
--cc=l.stach@pengutronix.de \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mediatek@lists.infradead.org \
--cc=mark.rutland@arm.com \
--cc=matthias.bgg@gmail.com \
--cc=robh+dt@kernel.org \
--cc=robin.murphy@arm.com \
--cc=srv_heupstream@mediatek.com \
--cc=tfiga@google.com \
--cc=will.deacon@arm.com \
--cc=yong.wu@mediatek.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).