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From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
To: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Joerg Roedel <joro@8bytes.org>,
	Magnus Damm <damm+renesas@opensource.se>,
	Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>,
	iommu@lists.linux-foundation.org,
	linux-renesas-soc@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/7] iommu/ipmmu-vmsa: Link IOMMUs and devices in sysfs
Date: Wed, 20 Feb 2019 17:25:05 +0200	[thread overview]
Message-ID: <20190220152505.GD3516@pendragon.ideasonboard.com> (raw)
In-Reply-To: <20190220150531.2462-2-geert+renesas@glider.be>

Hi Geert,

Thank you for the patch.

On Wed, Feb 20, 2019 at 04:05:25PM +0100, Geert Uytterhoeven wrote:
> As of commit 7af9a5fdb9e0ca33 ("iommu/ipmmu-vmsa: Use
> iommu_device_sysfs_add()/remove()"), IOMMU devices show up under
> /sys/class/iommus/, but their "devices" subdirectories are empty.
> Likewise, devices tied to an IOMMU do not have an "iommu" backlink.
> 
> Make sure all links are created, on both arm32 and arm64.
> 
> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> ---
>  drivers/iommu/ipmmu-vmsa.c | 24 +++++++++++++++++-------
>  1 file changed, 17 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c
> index 9a380c10655e182d..9f2b781e20a0eba6 100644
> --- a/drivers/iommu/ipmmu-vmsa.c
> +++ b/drivers/iommu/ipmmu-vmsa.c
> @@ -885,27 +885,37 @@ static int ipmmu_init_arm_mapping(struct device *dev)
>  
>  static int ipmmu_add_device(struct device *dev)
>  {
> +	struct ipmmu_vmsa_device *mmu = to_ipmmu(dev);
>  	struct iommu_group *group;
> +	int ret;
>  
>  	/*
>  	 * Only let through devices that have been verified in xlate()
>  	 */
> -	if (!to_ipmmu(dev))
> +	if (!mmu)
>  		return -ENODEV;
>  
> -	if (IS_ENABLED(CONFIG_ARM) && !IS_ENABLED(CONFIG_IOMMU_DMA))
> -		return ipmmu_init_arm_mapping(dev);
> +	if (IS_ENABLED(CONFIG_ARM) && !IS_ENABLED(CONFIG_IOMMU_DMA)) {
> +		ret = ipmmu_init_arm_mapping(dev);
> +		if (ret)
> +			return ret;
> +	} else {
> +		group = iommu_group_get_for_dev(dev);
> +		if (IS_ERR(group))
> +			return PTR_ERR(group);
>  
> -	group = iommu_group_get_for_dev(dev);
> -	if (IS_ERR(group))
> -		return PTR_ERR(group);
> +		iommu_group_put(group);
> +	}
>  
> -	iommu_group_put(group);
> +	iommu_device_link(&mmu->iommu, dev);
>  	return 0;
>  }
>  
>  static void ipmmu_remove_device(struct device *dev)
>  {
> +	struct ipmmu_vmsa_device *mmu = to_ipmmu(dev);
> +
> +	iommu_device_unlink(&mmu->iommu, dev);
>  	arm_iommu_detach_device(dev);
>  	iommu_group_remove_device(dev);
>  }

-- 
Regards,

Laurent Pinchart

  reply	other threads:[~2019-02-20 15:25 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-20 15:05 [PATCH 0/7] iommu/ipmmu-vmsa: Suspend/resume support and assorted cleanups Geert Uytterhoeven
2019-02-20 15:05 ` [PATCH 1/7] iommu/ipmmu-vmsa: Link IOMMUs and devices in sysfs Geert Uytterhoeven
2019-02-20 15:25   ` Laurent Pinchart [this message]
2019-02-20 15:05 ` [PATCH 2/7] iommu/ipmmu-vmsa: Call ipmmu_ctx_write_root() instead of open coding Geert Uytterhoeven
2019-02-20 15:27   ` Laurent Pinchart
2019-02-20 15:05 ` [PATCH 3/7] iommu/ipmmu-vmsa: Prepare to handle 40-bit error addresses Geert Uytterhoeven
2019-02-20 15:30   ` Laurent Pinchart
2019-02-20 15:42     ` Geert Uytterhoeven
2019-02-20 15:05 ` [PATCH 4/7] iommu/ipmmu-vmsa: Make IPMMU_CTX_MAX unsigned Geert Uytterhoeven
2019-02-20 15:31   ` Laurent Pinchart
2019-02-20 15:05 ` [PATCH 5/7] iommu/ipmmu-vmsa: Move num_utlbs to SoC-specific features Geert Uytterhoeven
2019-02-20 15:42   ` Laurent Pinchart
2019-02-20 15:05 ` [PATCH 6/7] iommu/ipmmu-vmsa: Extract hardware context initialization Geert Uytterhoeven
2019-02-20 15:35   ` Laurent Pinchart
2019-02-20 15:43     ` Geert Uytterhoeven
2019-02-20 15:05 ` [PATCH 7/7] iommu/ipmmu-vmsa: Add suspend/resume support Geert Uytterhoeven
2019-02-20 15:42   ` Laurent Pinchart
2019-02-20 16:05     ` Geert Uytterhoeven
2019-02-20 16:11       ` Laurent Pinchart
2019-02-20 19:47         ` Geert Uytterhoeven
2019-02-22 14:29   ` Robin Murphy

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