From: Yong Wu <yong.wu@mediatek.com>
To: Mitchel Humpherys <mitchelh@codeaurora.org>
Cc: Rob Herring <robh+dt@kernel.org>, Joerg Roedel <joro@8bytes.org>,
Matthias Brugger <matthias.bgg@gmail.com>,
Mark Rutland <mark.rutland@arm.com>, <devicetree@vger.kernel.org>,
<srv_heupstream@mediatek.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>, <linux-kernel@vger.kernel.org>,
"Tomasz Figa" <tfiga@google.com>,
<iommu@lists.linux-foundation.org>,
Daniel Kurtz <djkurtz@google.com>,
Sasha Hauer <kernel@pengutronix.de>,
<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, 9 Mar 2015 20:16:26 +0800 [thread overview]
Message-ID: <1425903386.13300.33.camel@mhfsdcap03> (raw)
In-Reply-To: <vnkwwq2unj2y.fsf@mitchelh-linux.qualcomm.com>
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.
>
> > + writel(0, m4u_base + REG_MMU_CPE_DONE);
> > + }
> > +
> > + return 0;
> > +}
>
>
>
> -Mitch
>
next prev parent reply other threads:[~2015-03-09 12:21 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 [this message]
2015-03-09 16:57 ` Mitchel Humpherys
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
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