From: Mikko Perttunen via iommu <iommu@lists.linux-foundation.org>
To: thierry.reding@gmail.com, jonathanh@nvidia.com, joro@8bytes.org,
will@kernel.org, robh+dt@kernel.org, robin.murphy@arm.com
Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
dri-devel@lists.freedesktop.org,
Mikko Perttunen <mperttunen@nvidia.com>,
iommu@lists.linux-foundation.org, linux-tegra@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 4/8] iommu/arm-smmu: Attach to host1x context device bus
Date: Thu, 16 Sep 2021 17:32:58 +0300 [thread overview]
Message-ID: <20210916143302.2024933-5-mperttunen@nvidia.com> (raw)
In-Reply-To: <20210916143302.2024933-1-mperttunen@nvidia.com>
Set itself as the IOMMU for the host1x context device bus, containing
"dummy" devices used for Host1x context isolation.
Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
---
drivers/iommu/arm/arm-smmu/arm-smmu.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.c b/drivers/iommu/arm/arm-smmu/arm-smmu.c
index 4bc75c4ce402..23082675d542 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu.c
@@ -39,6 +39,7 @@
#include <linux/amba/bus.h>
#include <linux/fsl/mc.h>
+#include <linux/host1x_context_bus.h>
#include "arm-smmu.h"
@@ -2051,8 +2052,20 @@ static int arm_smmu_bus_init(struct iommu_ops *ops)
goto err_reset_pci_ops;
}
#endif
+#ifdef CONFIG_TEGRA_HOST1X_CONTEXT_BUS
+ if (!iommu_present(&host1x_context_device_bus_type)) {
+ err = bus_set_iommu(&host1x_context_device_bus_type, ops);
+ if (err)
+ goto err_reset_fsl_mc_ops;
+ }
+#endif
+
return 0;
+err_reset_fsl_mc_ops: __maybe_unused;
+#ifdef CONFIG_FSL_MC_BUS
+ bus_set_iommu(&fsl_mc_bus_type, NULL);
+#endif
err_reset_pci_ops: __maybe_unused;
#ifdef CONFIG_PCI
bus_set_iommu(&pci_bus_type, NULL);
--
2.32.0
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next prev parent reply other threads:[~2021-09-16 15:13 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-16 14:32 [PATCH v2 0/8] Host1x context isolation support Mikko Perttunen via iommu
2021-09-16 14:32 ` [PATCH v2 1/8] gpu: host1x: Add context bus Mikko Perttunen via iommu
2021-09-16 14:32 ` [PATCH v2 2/8] gpu: host1x: Add context device management code Mikko Perttunen via iommu
2021-09-16 14:32 ` [PATCH v2 3/8] gpu: host1x: Program context stream ID on submission Mikko Perttunen via iommu
2021-09-16 14:32 ` Mikko Perttunen via iommu [this message]
2021-09-16 14:32 ` [PATCH v2 5/8] arm64: tegra: Add Host1x context stream IDs on Tegra186+ Mikko Perttunen via iommu
2021-09-16 14:33 ` [PATCH v2 6/8] drm/tegra: falcon: Set DMACTX field on DMA transactions Mikko Perttunen via iommu
2021-09-16 14:33 ` [PATCH v2 7/8] drm/tegra: vic: Implement get_streamid_offset Mikko Perttunen via iommu
2021-09-16 14:33 ` [PATCH v2 8/8] drm/tegra: Support context isolation Mikko Perttunen via iommu
2021-11-08 10:36 ` [PATCH v2 0/8] Host1x context isolation support Mikko Perttunen
2021-12-06 9:55 ` Jon Hunter via iommu
2021-12-14 8:05 ` Jon Hunter via iommu
2021-12-14 14:35 ` Dmitry Osipenko
2021-12-14 14:53 ` Mikko Perttunen
2021-12-14 15:31 ` Dmitry Osipenko
2021-12-14 15:38 ` Robin Murphy
2021-12-17 11:16 ` Jon Hunter via iommu
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