* [PATCH v3] gpu: host1x: Detach Host1x from IOMMU DMA domain on arm32
@ 2018-08-30 0:12 Dmitry Osipenko
2018-09-26 15:12 ` Thierry Reding
2018-09-28 2:58 ` Mikko Perttunen
0 siblings, 2 replies; 4+ messages in thread
From: Dmitry Osipenko @ 2018-08-30 0:12 UTC (permalink / raw)
To: Thierry Reding, Mikko Perttunen; +Cc: linux-tegra, dri-devel
Host1x is getting attached to an implicit IOMMU DMA domain if
CONFIG_ARM_DMA_USE_IOMMU=y. Since Host1x driver manages IOMMU by
itself, Host1x device must be detached from the implicit domain using
arch-specific IOMMU-API.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
Changelog:
v2: Correctly placed the detachment code, now Host1x is detached regardless
of the firewall state.
v3: Compiles now.
drivers/gpu/host1x/dev.c | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/host1x/dev.c b/drivers/gpu/host1x/dev.c
index d88073e7d22d..de6bc4e7fa23 100644
--- a/drivers/gpu/host1x/dev.c
+++ b/drivers/gpu/host1x/dev.c
@@ -29,6 +29,10 @@
#include <trace/events/host1x.h>
#undef CREATE_TRACE_POINTS
+#if IS_ENABLED(CONFIG_ARM_DMA_USE_IOMMU)
+#include <asm/dma-iommu.h>
+#endif
+
#include "bus.h"
#include "channel.h"
#include "debug.h"
@@ -217,7 +221,14 @@ static int host1x_probe(struct platform_device *pdev)
dev_err(&pdev->dev, "failed to get reset: %d\n", err);
return err;
}
-
+#if IS_ENABLED(CONFIG_ARM_DMA_USE_IOMMU)
+ if (host->dev->archdata.mapping) {
+ struct dma_iommu_mapping *mapping =
+ to_dma_iommu_mapping(host->dev);
+ arm_iommu_detach_device(host->dev);
+ arm_iommu_release_mapping(mapping);
+ }
+#endif
if (IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL))
goto skip_iommu;
--
2.18.0
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^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH v3] gpu: host1x: Detach Host1x from IOMMU DMA domain on arm32
2018-08-30 0:12 [PATCH v3] gpu: host1x: Detach Host1x from IOMMU DMA domain on arm32 Dmitry Osipenko
@ 2018-09-26 15:12 ` Thierry Reding
2018-09-28 2:58 ` Mikko Perttunen
1 sibling, 0 replies; 4+ messages in thread
From: Thierry Reding @ 2018-09-26 15:12 UTC (permalink / raw)
To: Dmitry Osipenko; +Cc: linux-tegra, Mikko Perttunen, dri-devel
[-- Attachment #1.1: Type: text/plain, Size: 655 bytes --]
On Thu, Aug 30, 2018 at 03:12:47AM +0300, Dmitry Osipenko wrote:
> Host1x is getting attached to an implicit IOMMU DMA domain if
> CONFIG_ARM_DMA_USE_IOMMU=y. Since Host1x driver manages IOMMU by
> itself, Host1x device must be detached from the implicit domain using
> arch-specific IOMMU-API.
>
> Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
> ---
>
> Changelog:
>
> v2: Correctly placed the detachment code, now Host1x is detached regardless
> of the firewall state.
>
> v3: Compiles now.
>
> drivers/gpu/host1x/dev.c | 13 ++++++++++++-
> 1 file changed, 12 insertions(+), 1 deletion(-)
Applied, thanks.
Thierry
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH v3] gpu: host1x: Detach Host1x from IOMMU DMA domain on arm32
2018-08-30 0:12 [PATCH v3] gpu: host1x: Detach Host1x from IOMMU DMA domain on arm32 Dmitry Osipenko
2018-09-26 15:12 ` Thierry Reding
@ 2018-09-28 2:58 ` Mikko Perttunen
2018-09-28 3:00 ` Mikko Perttunen
1 sibling, 1 reply; 4+ messages in thread
From: Mikko Perttunen @ 2018-09-28 2:58 UTC (permalink / raw)
To: Dmitry Osipenko, Thierry Reding; +Cc: linux-tegra, dri-devel
Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com>
On 30/08/2018 9.12, Dmitry Osipenko wrote:
> Host1x is getting attached to an implicit IOMMU DMA domain if
> CONFIG_ARM_DMA_USE_IOMMU=y. Since Host1x driver manages IOMMU by
> itself, Host1x device must be detached from the implicit domain using
> arch-specific IOMMU-API.
>
> Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
> ---
>
> Changelog:
>
> v2: Correctly placed the detachment code, now Host1x is detached regardless
> of the firewall state.
>
> v3: Compiles now.
>
> drivers/gpu/host1x/dev.c | 13 ++++++++++++-
> 1 file changed, 12 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/host1x/dev.c b/drivers/gpu/host1x/dev.c
> index d88073e7d22d..de6bc4e7fa23 100644
> --- a/drivers/gpu/host1x/dev.c
> +++ b/drivers/gpu/host1x/dev.c
> @@ -29,6 +29,10 @@
> #include <trace/events/host1x.h>
> #undef CREATE_TRACE_POINTS
>
> +#if IS_ENABLED(CONFIG_ARM_DMA_USE_IOMMU)
> +#include <asm/dma-iommu.h>
> +#endif
> +
> #include "bus.h"
> #include "channel.h"
> #include "debug.h"
> @@ -217,7 +221,14 @@ static int host1x_probe(struct platform_device *pdev)
> dev_err(&pdev->dev, "failed to get reset: %d\n", err);
> return err;
> }
> -
> +#if IS_ENABLED(CONFIG_ARM_DMA_USE_IOMMU)
> + if (host->dev->archdata.mapping) {
> + struct dma_iommu_mapping *mapping =
> + to_dma_iommu_mapping(host->dev);
> + arm_iommu_detach_device(host->dev);
> + arm_iommu_release_mapping(mapping);
> + }
> +#endif
> if (IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL))
> goto skip_iommu;
>
>
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH v3] gpu: host1x: Detach Host1x from IOMMU DMA domain on arm32
2018-09-28 2:58 ` Mikko Perttunen
@ 2018-09-28 3:00 ` Mikko Perttunen
0 siblings, 0 replies; 4+ messages in thread
From: Mikko Perttunen @ 2018-09-28 3:00 UTC (permalink / raw)
To: Dmitry Osipenko, Thierry Reding; +Cc: linux-tegra, dri-devel
Hmm, I guess that was a bit late. Damn inbox filters ..
Mikko
On 28/09/2018 11.58, Mikko Perttunen wrote:
> Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com>
>
> On 30/08/2018 9.12, Dmitry Osipenko wrote:
>> Host1x is getting attached to an implicit IOMMU DMA domain if
>> CONFIG_ARM_DMA_USE_IOMMU=y. Since Host1x driver manages IOMMU by
>> itself, Host1x device must be detached from the implicit domain using
>> arch-specific IOMMU-API.
>>
>> Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
>> ---
>>
>> Changelog:
>>
>> v2: Correctly placed the detachment code, now Host1x is detached
>> regardless
>> of the firewall state.
>>
>> v3: Compiles now.
>>
>> drivers/gpu/host1x/dev.c | 13 ++++++++++++-
>> 1 file changed, 12 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/gpu/host1x/dev.c b/drivers/gpu/host1x/dev.c
>> index d88073e7d22d..de6bc4e7fa23 100644
>> --- a/drivers/gpu/host1x/dev.c
>> +++ b/drivers/gpu/host1x/dev.c
>> @@ -29,6 +29,10 @@
>> #include <trace/events/host1x.h>
>> #undef CREATE_TRACE_POINTS
>> +#if IS_ENABLED(CONFIG_ARM_DMA_USE_IOMMU)
>> +#include <asm/dma-iommu.h>
>> +#endif
>> +
>> #include "bus.h"
>> #include "channel.h"
>> #include "debug.h"
>> @@ -217,7 +221,14 @@ static int host1x_probe(struct platform_device
>> *pdev)
>> dev_err(&pdev->dev, "failed to get reset: %d\n", err);
>> return err;
>> }
>> -
>> +#if IS_ENABLED(CONFIG_ARM_DMA_USE_IOMMU)
>> + if (host->dev->archdata.mapping) {
>> + struct dma_iommu_mapping *mapping =
>> + to_dma_iommu_mapping(host->dev);
>> + arm_iommu_detach_device(host->dev);
>> + arm_iommu_release_mapping(mapping);
>> + }
>> +#endif
>> if (IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL))
>> goto skip_iommu;
>>
> _______________________________________________
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> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
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2018-08-30 0:12 [PATCH v3] gpu: host1x: Detach Host1x from IOMMU DMA domain on arm32 Dmitry Osipenko
2018-09-26 15:12 ` Thierry Reding
2018-09-28 2:58 ` Mikko Perttunen
2018-09-28 3:00 ` Mikko Perttunen
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