From: Yong Wu <yong.wu@mediatek.com>
To: Evan Green <evgreen@chromium.org>
Cc: Joerg Roedel <joro@8bytes.org>,
Matthias Brugger <matthias.bgg@gmail.com>,
Robin Murphy <robin.murphy@arm.com>,
Rob Herring <robh+dt@kernel.org>, Tomasz Figa <tfiga@google.com>,
Will Deacon <will.deacon@arm.com>,
linux-mediatek@lists.infradead.org, srv_heupstream@mediatek.com,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@vger.kernel.org>, LKML <linux-kernel@vger.kernel.org>,
linux-arm-kernel@lists.infradead.org,
iommu@lists.linux-foundation.org, Arnd Bergmann <arnd@arndb.de>,
yingjoe.chen@mediatek.com, youlin.pei@mediatek.com,
Nicolas Boichat <drinkcat@chromium.org>
Subject: Re: [PATCH v5 16/20] memory: mtk-smi: Add bus_sel for mt8183
Date: Thu, 31 Jan 2019 11:20:08 +0800 [thread overview]
Message-ID: <1548904808.19710.35.camel@mhfsdcap03> (raw)
In-Reply-To: <CAE=gft4q3oj+oQ=Vo-kGD7OYTO0_WMf8t4SLa_H7SCH8G2VFOw@mail.gmail.com>
On Wed, 2019-01-30 at 11:07 -0800, Evan Green wrote:
> On Mon, Dec 31, 2018 at 7:59 PM Yong Wu <yong.wu@mediatek.com> wrote:
> >
> > There are 2 mmu cells in a M4U HW. we could adjust some larbs entering
> > mmu0 or mmu1 to balance the bandwidth via the smi-common register
> > SMI_BUS_SEL(0x220)(Each larb occupy 2 bits).
> >
> > In mt8183, For better performance, we switch larb1/2/5/7 to enter
> > mmu1 while the others still keep enter mmu0.
> >
> > In mt8173 and mt2712, we don't get the performance issue,
> > Keep its default value(0x0), that means all the larbs enter mmu0.
> >
> > Note: smi gen1(mt2701/mt7623) don't have this bus_sel.
> >
> > CC: Matthias Brugger <matthias.bgg@gmail.com>
> > Signed-off-by: Yong Wu <yong.wu@mediatek.com>
> > ---
> > drivers/memory/mtk-smi.c | 22 ++++++++++++++++++++--
> > 1 file changed, 20 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c
> > index 9790801..08cf40d 100644
> > --- a/drivers/memory/mtk-smi.c
> > +++ b/drivers/memory/mtk-smi.c
> > @@ -49,6 +49,12 @@
> > #define SMI_LARB_NONSEC_CON(id) (0x380 + ((id) * 4))
> > #define F_MMU_EN BIT(0)
> >
> > +/* SMI COMMON */
> > +#define SMI_BUS_SEL 0x220
> > +#define SMI_BUS_LARB_SHIFT(larbid) ((larbid) << 1)
> > +/* All are MMU0 defaultly. Only specialize mmu1 here. */
> > +#define F_MMU1_LARB(larbid) (0x1 << SMI_BUS_LARB_SHIFT(larbid))
> > +
> > enum mtk_smi_gen {
> > MTK_SMI_GEN1,
> > MTK_SMI_GEN2
> > @@ -57,6 +63,7 @@ enum mtk_smi_gen {
> > struct mtk_smi_common_plat {
> > enum mtk_smi_gen gen;
> > bool has_gals;
> > + u32 bus_sel; /* Balance some larbs to enter mmu0 or mmu1 */
> > };
> >
> > struct mtk_smi_larb_gen {
> > @@ -72,8 +79,8 @@ struct mtk_smi {
> > struct clk *clk_apb, *clk_smi;
> > struct clk *clk_gals0, *clk_gals1;
> > struct clk *clk_async; /*only needed by mt2701*/
> > - void __iomem *smi_ao_base;
> > -
> > + void __iomem *smi_ao_base; /* only for gen1 */
> > + void __iomem *base; /* only for gen2 */
> > const struct mtk_smi_common_plat *plat;
> > };
> >
> > @@ -410,6 +417,8 @@ static int __maybe_unused mtk_smi_larb_suspend(struct device *dev)
> > static const struct mtk_smi_common_plat mtk_smi_common_mt8183 = {
> > .gen = MTK_SMI_GEN2,
> > .has_gals = true,
> > + .bus_sel = F_MMU1_LARB(1) | F_MMU1_LARB(2) | F_MMU1_LARB(5) |
> > + F_MMU1_LARB(7),
> > };
> >
> > static const struct of_device_id mtk_smi_common_of_ids[] = {
> > @@ -482,6 +491,11 @@ static int mtk_smi_common_probe(struct platform_device *pdev)
> > ret = clk_prepare_enable(common->clk_async);
> > if (ret)
> > return ret;
> > + } else {
> > + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > + common->base = devm_ioremap_resource(dev, res);
> > + if (IS_ERR(common->base))
> > + return PTR_ERR(common->base);
>
> So you split base and smi_ao_base because they're completely different
> register regions, or because ->base is no longer "always on"? It's
> tempting to recombine them because they appear to be mutually
> exclusive, but if they're truly different register regions then I
> understand.
They are completely different. the common->base is the smi-common normal
base while the common->smi_ao_base only exist in smi-gen1.
prev parent reply other threads:[~2019-01-31 3:20 UTC|newest]
Thread overview: 67+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-01 3:55 [PATCH v5 00/18] MT8183 IOMMU SUPPORT Yong Wu
[not found] ` <1546314952-15990-1-git-send-email-yong.wu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
2019-01-01 3:55 ` [PATCH v5 01/20] dt-bindings: mediatek: Add binding for mt8183 IOMMU and SMI Yong Wu
[not found] ` <1546314952-15990-2-git-send-email-yong.wu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
2019-01-30 18:27 ` Evan Green
2019-01-31 3:19 ` Yong Wu
2019-01-01 3:55 ` [PATCH v5 02/20] iommu/mediatek: Use a struct as the platform data Yong Wu
2019-01-30 18:27 ` Evan Green
2019-01-01 3:55 ` [PATCH v5 03/20] memory: mtk-smi: Use a general config_port interface Yong Wu
2019-01-30 18:27 ` Evan Green
2019-01-01 3:55 ` [PATCH v5 04/20] memory: mtk-smi: Use a struct for the platform data for smi-common Yong Wu
2019-01-30 18:28 ` Evan Green
2019-01-01 3:55 ` [PATCH v5 05/20] iommu/io-pgtable-arm-v7s: Add paddr_to_iopte and iopte_to_paddr helpers Yong Wu
2019-01-30 18:28 ` Evan Green
2019-01-01 3:55 ` [PATCH v6 06/20] iommu/io-pgtable-arm-v7s: Extend MediaTek 4GB Mode Yong Wu
2019-01-30 18:28 ` Evan Green
2019-01-31 6:58 ` Yong Wu
2019-01-31 19:23 ` Evan Green
2019-02-01 9:42 ` Yong Wu
2019-02-05 23:11 ` Evan Green
[not found] ` <CAE=gft4YBvbq5fSuu-RzY9jF8ea8eLKHgOrZ46wPcgdSAWKkVQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2019-02-17 10:01 ` Yong Wu
2019-01-01 3:55 ` [PATCH v5 08/20] iommu/mediatek: Add larb-id remapped support Yong Wu
[not found] ` <1546314952-15990-9-git-send-email-yong.wu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
2019-01-02 6:15 ` Nicolas Boichat
2019-01-30 18:29 ` Evan Green
2019-01-01 3:55 ` [PATCH v5 09/20] iommu/mediatek: Refine protect memory definition Yong Wu
[not found] ` <1546314952-15990-10-git-send-email-yong.wu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
2019-01-02 6:23 ` Nicolas Boichat
[not found] ` <CANMq1KC0zciUAtvcYoxfBOOMbGFu_Un031QemtuDopjWvwk3cw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2019-01-02 9:33 ` Yong Wu
2019-01-30 18:30 ` Evan Green
2019-01-01 3:55 ` [PATCH v5 10/20] iommu/mediatek: Move reset_axi into plat_data Yong Wu
[not found] ` <1546314952-15990-11-git-send-email-yong.wu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
2019-01-02 6:43 ` Nicolas Boichat
2019-01-30 18:30 ` Evan Green
2019-01-31 3:22 ` Yong Wu
2019-01-01 3:55 ` [PATCH v5 11/20] iommu/mediatek: Move vld_pa_rng " Yong Wu
[not found] ` <1546314952-15990-12-git-send-email-yong.wu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
2019-01-02 6:45 ` Nicolas Boichat
[not found] ` <CANMq1KAZumH0=iLFgi7=P2mCE4B=7nw_FW9ir4Dwp4M3f8Ukjg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2019-01-02 9:32 ` Yong Wu
2019-01-30 18:30 ` Evan Green
2019-01-31 3:20 ` Yong Wu
2019-01-31 16:36 ` Evan Green
2019-01-01 3:55 ` [PATCH v5 13/20] iommu/mediatek: Add mt8183 IOMMU support Yong Wu
2019-01-30 18:31 ` Evan Green
2019-01-31 3:19 ` Yong Wu
2019-01-01 3:55 ` [PATCH v5 14/20] iommu/mediatek: Add mmu1 support Yong Wu
2019-01-30 18:55 ` Evan Green
2019-01-31 3:22 ` Yong Wu
2019-01-01 3:55 ` [PATCH v5 17/20] memory: mtk-smi: Get rid of need_larbid Yong Wu
[not found] ` <1546314952-15990-18-git-send-email-yong.wu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
2019-01-30 19:11 ` Evan Green
2019-01-31 3:22 ` Yong Wu
2019-01-31 17:45 ` Evan Green
2019-02-01 9:42 ` Yong Wu
2019-01-01 3:55 ` [PATCH v5 18/20] iommu/mediatek: Fix VLD_PA_RANGE register backup when suspend Yong Wu
[not found] ` <1546314952-15990-19-git-send-email-yong.wu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
2019-01-02 6:54 ` Nicolas Boichat
2019-01-02 9:31 ` Yong Wu
2019-01-30 19:11 ` Evan Green
2019-01-01 3:55 ` [PATCH v5 19/20] iommu/mediatek: Add shutdown callback Yong Wu
2019-01-30 19:12 ` Evan Green
2019-01-31 3:21 ` Yong Wu
2019-01-01 3:55 ` [PATCH v5 20/20] iommu/mediatek: Switch to SPDX license identifier Yong Wu
2019-01-30 19:13 ` Evan Green
2019-01-01 3:55 ` [PATCH v5 07/20] iommu/mediatek: Add bclk can be supported optionally Yong Wu
2019-01-30 18:29 ` Evan Green
2019-01-01 3:55 ` [PATCH v5 12/20] memory: mtk-smi: Add gals support Yong Wu
2019-01-14 6:57 ` Yong Wu
[not found] ` <1546314952-15990-13-git-send-email-yong.wu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
2019-01-30 18:30 ` Evan Green
2019-01-01 3:55 ` [PATCH v5 15/20] memory: mtk-smi: Invoke pm runtime_callback to enable clocks Yong Wu
2019-01-30 19:05 ` Evan Green
2019-01-31 3:42 ` Yong Wu
2019-01-01 3:55 ` [PATCH v5 16/20] memory: mtk-smi: Add bus_sel for mt8183 Yong Wu
2019-01-30 19:07 ` Evan Green
2019-01-31 3:20 ` Yong Wu [this message]
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