IOMMU Archive on lore.kernel.org
 help / color / Atom feed
From: Yong Wu <yong.wu@mediatek.com>
To: Matthias Brugger <matthias.bgg@gmail.com>
Cc: youlin.pei@mediatek.com, devicetree@vger.kernel.org,
	Nicolas Boichat <drinkcat@chromium.org>,
	srv_heupstream@mediatek.com, Will Deacon <will.deacon@arm.com>,
	linux-kernel@vger.kernel.org, Evan Green <evgreen@chromium.org>,
	Tomasz Figa <tfiga@google.com>,
	iommu@lists.linux-foundation.org,
	Rob Herring <robh+dt@kernel.org>,
	linux-mediatek@lists.infradead.org, yingjoe.chen@mediatek.com,
	anan.sun@mediatek.com, Robin Murphy <robin.murphy@arm.com>,
	Matthias Kaehlcke <mka@chromium.org>,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v7 17/21] memory: mtk-smi: Get rid of need_larbid
Date: Thu, 20 Jun 2019 21:59:36 +0800
Message-ID: <1561039176.4021.21.camel@mhfsdcap03> (raw)
In-Reply-To: <1af7b67a-b73a-efb9-e1f8-5701f05a4af0@gmail.com>

On Tue, 2019-06-18 at 15:45 +0200, Matthias Brugger wrote:
> 
> On 10/06/2019 14:17, Yong Wu wrote:
> > The "mediatek,larb-id" has already been parsed in MTK IOMMU driver.
> > It's no need to parse it again in SMI driver. Only clean some codes.
> > This patch is fit for all the current mt2701, mt2712, mt7623, mt8173
> > and mt8183.
> > 
> > After this patch, the "mediatek,larb-id" only be needed for mt2712
> > which have 2 M4Us. In the other SoCs, we can get the larb-id from M4U
> > in which the larbs in the "mediatek,larbs" always are ordered.
> > 
> > Correspondingly, the larb_nr in the "struct mtk_smi_iommu" could also
> > be deleted.
> > 
> 
> I think we can get rid of struct mtk_smi_iommu and just add the
> struct mtk_smi_larb_iommu larb_imu[MTK_LARB_NR_MAX] directly to mtk_iommu_data,
> passing just that array to the components bind function.

Thanks. I will try this in a new patch.

> 
> Never the less this patch looks fine:
> Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>

Really appreciate for reviewing so many patches.

> 
> > CC: Matthias Brugger <matthias.bgg@gmail.com>
> > Signed-off-by: Yong Wu <yong.wu@mediatek.com>
> > Reviewed-by: Evan Green <evgreen@chromium.org>
> > ---
> >  drivers/iommu/mtk_iommu.c    |  1 -
> >  drivers/iommu/mtk_iommu_v1.c |  2 --
> >  drivers/memory/mtk-smi.c     | 26 ++------------------------
> >  include/soc/mediatek/smi.h   |  1 -
> >  4 files changed, 2 insertions(+), 28 deletions(-)
> > 
> > diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
> > index ec4ce74..6053b8b 100644
> > --- a/drivers/iommu/mtk_iommu.c
> > +++ b/drivers/iommu/mtk_iommu.c
> > @@ -634,7 +634,6 @@ static int mtk_iommu_probe(struct platform_device *pdev)
> >  					     "mediatek,larbs", NULL);
> >  	if (larb_nr < 0)
> >  		return larb_nr;
> > -	data->smi_imu.larb_nr = larb_nr;
> >  
> >  	for (i = 0; i < larb_nr; i++) {
> >  		struct device_node *larbnode;
> > diff --git a/drivers/iommu/mtk_iommu_v1.c b/drivers/iommu/mtk_iommu_v1.c
> > index 52b01e3..73308ad 100644
> > --- a/drivers/iommu/mtk_iommu_v1.c
> > +++ b/drivers/iommu/mtk_iommu_v1.c
> > @@ -624,8 +624,6 @@ static int mtk_iommu_probe(struct platform_device *pdev)
> >  		larb_nr++;
> >  	}
> >  
> > -	data->smi_imu.larb_nr = larb_nr;
> > -
> >  	platform_set_drvdata(pdev, data);
> >  
> >  	ret = mtk_iommu_hw_init(data);
> > diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c
> > index 08cf40d..10e6493 100644
> > --- a/drivers/memory/mtk-smi.c
> > +++ b/drivers/memory/mtk-smi.c
> > @@ -67,7 +67,6 @@ struct mtk_smi_common_plat {
> >  };
> >  
> >  struct mtk_smi_larb_gen {
> > -	bool need_larbid;
> >  	int port_in_larb[MTK_LARB_NR_MAX + 1];
> >  	void (*config_port)(struct device *);
> >  	unsigned int larb_direct_to_common_mask;
> > @@ -153,18 +152,9 @@ void mtk_smi_larb_put(struct device *larbdev)
> >  	struct mtk_smi_iommu *smi_iommu = data;
> >  	unsigned int         i;
> >  
> > -	if (larb->larb_gen->need_larbid) {
> > -		larb->mmu = &smi_iommu->larb_imu[larb->larbid].mmu;
> > -		return 0;
> > -	}
> > -
> > -	/*
> > -	 * If there is no larbid property, Loop to find the corresponding
> > -	 * iommu information.
> > -	 */
> > -	for (i = 0; i < smi_iommu->larb_nr; i++) {
> > +	for (i = 0; i < MTK_LARB_NR_MAX; i++) {
> >  		if (dev == smi_iommu->larb_imu[i].dev) {
> > -			/* The 'mmu' may be updated in iommu-attach/detach. */
> > +			larb->larbid = i;
> >  			larb->mmu = &smi_iommu->larb_imu[i].mmu;
> >  			return 0;
> >  		}
> > @@ -243,7 +233,6 @@ static void mtk_smi_larb_config_port_gen1(struct device *dev)
> >  };
> >  
> >  static const struct mtk_smi_larb_gen mtk_smi_larb_mt2701 = {
> > -	.need_larbid = true,
> >  	.port_in_larb = {
> >  		LARB0_PORT_OFFSET, LARB1_PORT_OFFSET,
> >  		LARB2_PORT_OFFSET, LARB3_PORT_OFFSET
> > @@ -252,7 +241,6 @@ static void mtk_smi_larb_config_port_gen1(struct device *dev)
> >  };
> >  
> >  static const struct mtk_smi_larb_gen mtk_smi_larb_mt2712 = {
> > -	.need_larbid = true,
> >  	.config_port                = mtk_smi_larb_config_port_gen2_general,
> >  	.larb_direct_to_common_mask = BIT(8) | BIT(9),      /* bdpsys */
> >  };
> > @@ -291,7 +279,6 @@ static int mtk_smi_larb_probe(struct platform_device *pdev)
> >  	struct device *dev = &pdev->dev;
> >  	struct device_node *smi_node;
> >  	struct platform_device *smi_pdev;
> > -	int err;
> >  
> >  	larb = devm_kzalloc(dev, sizeof(*larb), GFP_KERNEL);
> >  	if (!larb)
> > @@ -321,15 +308,6 @@ static int mtk_smi_larb_probe(struct platform_device *pdev)
> >  	}
> >  	larb->smi.dev = dev;
> >  
> > -	if (larb->larb_gen->need_larbid) {
> > -		err = of_property_read_u32(dev->of_node, "mediatek,larb-id",
> > -					   &larb->larbid);
> > -		if (err) {
> > -			dev_err(dev, "missing larbid property\n");
> > -			return err;
> > -		}
> > -	}
> > -
> >  	smi_node = of_parse_phandle(dev->of_node, "mediatek,smi", 0);
> >  	if (!smi_node)
> >  		return -EINVAL;
> > diff --git a/include/soc/mediatek/smi.h b/include/soc/mediatek/smi.h
> > index 5201e90..a65324d 100644
> > --- a/include/soc/mediatek/smi.h
> > +++ b/include/soc/mediatek/smi.h
> > @@ -29,7 +29,6 @@ struct mtk_smi_larb_iommu {
> >  };
> >  
> >  struct mtk_smi_iommu {
> > -	unsigned int larb_nr;
> >  	struct mtk_smi_larb_iommu larb_imu[MTK_LARB_NR_MAX];
> >  };
> >  
> > 


_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu

  reply index

Thread overview: 53+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-10 12:17 [PATCH v7 00/21] MT8183 IOMMU SUPPORT Yong Wu
2019-06-10 12:17 ` [PATCH v7 01/21] dt-bindings: mediatek: Add binding for mt8183 IOMMU and SMI Yong Wu
2019-06-10 12:17 ` [PATCH v7 02/21] iommu/mediatek: Use a struct as the platform data Yong Wu
2019-06-10 12:17 ` [PATCH v7 03/21] memory: mtk-smi: Use a general config_port interface Yong Wu
2019-06-10 12:17 ` [PATCH v7 04/21] memory: mtk-smi: Use a struct for the platform data for smi-common Yong Wu
2019-06-10 12:17 ` [PATCH v7 05/21] iommu/io-pgtable-arm-v7s: Add paddr_to_iopte and iopte_to_paddr helpers Yong Wu
2019-06-10 12:17 ` [PATCH v7 06/21] iommu/io-pgtable-arm-v7s: Extend MediaTek 4GB Mode Yong Wu
2019-06-10 12:17 ` [PATCH v7 07/21] iommu/mediatek: Add bclk can be supported optionally Yong Wu
2019-06-15 19:18   ` Matthias Brugger
2019-06-10 12:17 ` [PATCH v7 08/21] iommu/mediatek: Add larb-id remapped support Yong Wu
2019-06-17  9:25   ` Matthias Brugger
2019-06-10 12:17 ` [PATCH v7 09/21] iommu/mediatek: Refine protect memory definition Yong Wu
2019-06-17  9:59   ` Matthias Brugger
2019-06-10 12:17 ` [PATCH v7 10/21] iommu/mediatek: Move reset_axi into plat_data Yong Wu
2019-06-17 10:19   ` Matthias Brugger
2019-06-10 12:17 ` [PATCH v7 11/21] iommu/mediatek: Move vld_pa_rng " Yong Wu
2019-06-17 10:27   ` Matthias Brugger
2019-06-10 12:17 ` [PATCH v7 12/21] memory: mtk-smi: Add gals support Yong Wu
2019-06-17 15:43   ` Matthias Brugger
2019-06-10 12:17 ` [PATCH v7 13/21] iommu/mediatek: Add mt8183 IOMMU support Yong Wu
2019-06-17 15:51   ` Matthias Brugger
2019-06-10 12:17 ` [PATCH v7 14/21] iommu/mediatek: Add mmu1 support Yong Wu
2019-06-17 15:58   ` Matthias Brugger
2019-06-18  6:19   ` Tomasz Figa via iommu
2019-06-18 12:09     ` Yong Wu
2019-06-18 14:05       ` Tomasz Figa via iommu
2019-06-10 12:17 ` [PATCH v7 15/21] memory: mtk-smi: Invoke pm runtime_callback to enable clocks Yong Wu
2019-06-17 16:13   ` Matthias Brugger
2019-06-10 12:17 ` [PATCH v7 16/21] memory: mtk-smi: Add bus_sel for mt8183 Yong Wu
2019-06-13  8:14   ` Pi-Hsun Shih
2019-06-20  9:35     ` Matthias Brugger
2019-06-20 11:38       ` Matthias Brugger
2019-06-21  3:57         ` Pi-Hsun Shih
2019-06-13  8:20   ` Pi-Hsun Shih
2019-06-17 16:28     ` Matthias Brugger
2019-06-17 16:23   ` Matthias Brugger
2019-06-18 12:10     ` Yong Wu
2019-06-18 21:07       ` Matthias Brugger
2019-06-10 12:17 ` [PATCH v7 17/21] memory: mtk-smi: Get rid of need_larbid Yong Wu
2019-06-18 13:45   ` Matthias Brugger
2019-06-20 13:59     ` Yong Wu [this message]
2019-06-10 12:17 ` [PATCH v7 18/21] iommu/mediatek: Fix VLD_PA_RNG register backup when suspend Yong Wu
2019-06-17 16:30   ` Matthias Brugger
2019-06-10 12:17 ` [PATCH v7 19/21] iommu/mediatek: Rename enable_4GB to dram_is_4gb Yong Wu
2019-06-18 16:06   ` Matthias Brugger
2019-06-20 13:59     ` Yong Wu
2019-06-21 10:10       ` Matthias Brugger
2019-06-22  2:42         ` Yong Wu
2019-06-10 12:17 ` [PATCH v7 20/21] iommu/mediatek: Fix iova_to_phys PA start for 4GB mode Yong Wu
2019-06-18 16:35   ` Matthias Brugger
2019-06-20 14:00     ` Yong Wu
2019-06-10 12:18 ` [PATCH v7 21/21] iommu/mediatek: Switch to SPDX license identifier Yong Wu
2019-06-17 16:33   ` Matthias Brugger

Reply instructions:

You may reply publically 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=1561039176.4021.21.camel@mhfsdcap03 \
    --to=yong.wu@mediatek.com \
    --cc=anan.sun@mediatek.com \
    --cc=devicetree@vger.kernel.org \
    --cc=drinkcat@chromium.org \
    --cc=evgreen@chromium.org \
    --cc=iommu@lists.linux-foundation.org \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mediatek@lists.infradead.org \
    --cc=matthias.bgg@gmail.com \
    --cc=mka@chromium.org \
    --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=yingjoe.chen@mediatek.com \
    --cc=youlin.pei@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

IOMMU Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-iommu/0 linux-iommu/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-iommu linux-iommu/ https://lore.kernel.org/linux-iommu \
		iommu@lists.linux-foundation.org iommu@archiver.kernel.org
	public-inbox-index linux-iommu


Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.linux-foundation.lists.iommu


AGPL code for this site: git clone https://public-inbox.org/ public-inbox