From: James.Bottomley@HansenPartnership•com (James Bottomley)
To: linux-arm-kernel@lists•infradead.org
Subject: How to specify IOMMU'able devices in DT (was: [RFC 0/5] ARM: dma-mapping: New dma_map_ops to control IOVA more precisely)
Date: Mon, 24 Sep 2012 13:28:01 +0400 [thread overview]
Message-ID: <1348478881.2467.27.camel@dabdike> (raw)
In-Reply-To: <20120924120415.8e6929a34c422185a98d3f82@nvidia.com>
On Mon, 2012-09-24 at 12:04 +0300, Hiroshi Doyu wrote:
> diff --git a/drivers/base/platform.c b/drivers/base/platform.c
> index a1a7225..9eae3be 100644
> --- a/drivers/base/platform.c
> +++ b/drivers/base/platform.c
> @@ -21,6 +21,8 @@
> #include <linux/slab.h>
> #include <linux/pm_runtime.h>
>
> +#include <asm/dma-iommu.h>
> +
> #include "base.h"
>
> #define to_platform_driver(drv) (container_of((drv), struct
> platform_driver, \
> @@ -305,8 +307,19 @@ int platform_device_add(struct platform_device
> *pdev)
> dev_name(&pdev->dev), dev_name(pdev->dev.parent));
>
> ret = device_add(&pdev->dev);
> - if (ret == 0)
> - return ret;
> + if (ret)
> + goto failed;
> +
> +#ifdef CONFIG_PLATFORM_ENABLE_IOMMU
> + if (platform_bus_type.map && !pdev->dev.archdata.mapping) {
> + ret = arm_iommu_attach_device(&pdev->dev,
> + platform_bus_type.map);
> + if (ret)
> + goto failed;
This is horrible ... you're adding an architecture specific callback
into our generic code; that's really a no-no. If the concept of
CONFIG_PLATFORM_ENABE_IOMMU is useful to more than just arm, then this
could become a generic callback.
James
next prev parent reply other threads:[~2012-09-24 9:28 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-29 6:55 [RFC 0/5] ARM: dma-mapping: New dma_map_ops to control IOVA more precisely Hiroshi Doyu
2012-08-29 6:55 ` [RFC 1/5] ARM: dma-mapping: New dma_map_ops->iova_get_free_{total, max} functions Hiroshi Doyu
2012-08-29 6:55 ` [RFC 2/5] ARM: dma-mapping: New dma_map_ops->iova_{alloc, free}() functions Hiroshi Doyu
2012-08-29 6:55 ` [RFC 3/5] ARM: dma-mapping: New dma_map_ops->iova_alloc*_at* function Hiroshi Doyu
2012-08-29 6:55 ` [RFC 4/5] ARM: dma-mapping: New dma_map_ops->map_page*_at* function Hiroshi Doyu
2012-08-29 6:55 ` [RFC 5/5] ARM: dma-mapping: Introduce dma_map_linear_attrs() for IOVA linear map Hiroshi Doyu
2012-09-18 12:49 ` [RFC 0/5] ARM: dma-mapping: New dma_map_ops to control IOVA more precisely Joerg Roedel
2012-09-19 6:58 ` Hiroshi Doyu
2012-09-19 7:59 ` Arnd Bergmann
2012-09-19 11:41 ` Hiroshi Doyu
2012-09-19 12:50 ` Joerg Roedel
2012-09-20 1:44 ` Krishna Reddy
2012-09-20 2:21 ` Stephen Warren
2012-09-20 6:40 ` Krishna Reddy
2012-09-20 15:27 ` Stephen Warren
2012-09-21 18:16 ` Krishna Reddy
2012-09-24 9:04 ` How to specify IOMMU'able devices in DT (was: [RFC 0/5] ARM: dma-mapping: New dma_map_ops to control IOVA more precisely) Hiroshi Doyu
2012-09-24 9:28 ` James Bottomley [this message]
2012-09-24 9:44 ` Hiroshi Doyu
2012-09-24 11:14 ` Marek Szyprowski
2012-09-24 11:50 ` How to specify IOMMU'able devices in DT Hiroshi Doyu
2012-11-28 13:48 ` [PATCH 1/1] ARM: tegra: bus_notifier registers IOMMU devices(was: How to specify IOMMU'able devices in DT) Hiroshi Doyu
2012-11-28 18:07 ` Stephen Warren
2012-11-29 6:45 ` Hiroshi Doyu
2012-11-29 10:17 ` Thierry Reding
2012-11-30 4:59 ` Mark Zhang
2012-11-30 8:06 ` [PATCH 1/1] ARM: tegra: bus_notifier registers IOMMU devices Hiroshi Doyu
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