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From: Jean-Philippe Brucker <jean-philippe@linaro.org>
To: linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-acpi@vger.kernel.org, devicetree@vger.kernel.org,
	iommu@lists.linux-foundation.org, will@kernel.org
Cc: joro@8bytes.org, robh+dt@kernel.org, mark.rutland@arm.com,
	lorenzo.pieralisi@arm.com, guohanjun@huawei.com,
	sudeep.holla@arm.com, rjw@rjwysocki.net, lenb@kernel.org,
	robin.murphy@arm.com, bhelgaas@google.com, eric.auger@redhat.com,
	jonathan.cameron@huawei.com, zhangfei.gao@linaro.org
Subject: [PATCH v5 04/13] ACPI/IORT: Parse SSID property of named component node
Date: Wed, 15 Jan 2020 13:52:30 +0100
Message-ID: <20200115125239.136759-5-jean-philippe@linaro.org> (raw)
In-Reply-To: <20200115125239.136759-1-jean-philippe@linaro.org>

Named component nodes in the IORT tables describe the number of
Substream ID bits (aka. PASID) supported by the device. Propagate this
value to the fwspec structure in order to enable PASID for platform
devices.

Acked-by: Hanjun Guo <guohanjun@huawei.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
---
 drivers/acpi/arm64/iort.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c
index 33f71983e001..39f389214ecf 100644
--- a/drivers/acpi/arm64/iort.c
+++ b/drivers/acpi/arm64/iort.c
@@ -11,6 +11,7 @@
 #define pr_fmt(fmt)	"ACPI: IORT: " fmt
 
 #include <linux/acpi_iort.h>
+#include <linux/bitfield.h>
 #include <linux/iommu.h>
 #include <linux/kernel.h>
 #include <linux/list.h>
@@ -924,6 +925,20 @@ static int iort_pci_iommu_init(struct pci_dev *pdev, u16 alias, void *data)
 	return iort_iommu_xlate(info->dev, parent, streamid);
 }
 
+static void iort_named_component_init(struct device *dev,
+				      struct acpi_iort_node *node)
+{
+	struct acpi_iort_named_component *nc;
+	struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
+
+	if (!fwspec)
+		return;
+
+	nc = (struct acpi_iort_named_component *)node->node_data;
+	fwspec->num_pasid_bits = FIELD_GET(ACPI_IORT_NC_PASID_BITS,
+					   nc->node_flags);
+}
+
 /**
  * iort_iommu_configure - Set-up IOMMU configuration for a device.
  *
@@ -978,6 +993,9 @@ const struct iommu_ops *iort_iommu_configure(struct device *dev)
 			if (parent)
 				err = iort_iommu_xlate(dev, parent, streamid);
 		} while (parent && !err);
+
+		if (!err)
+			iort_named_component_init(dev, node);
 	}
 
 	/*
-- 
2.24.1


  parent reply index

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-15 12:52 [PATCH v5 00/13] iommu: Add PASID support to Arm SMMUv3 Jean-Philippe Brucker
2020-01-15 12:52 ` [PATCH v5 01/13] iommu/arm-smmu-v3: Drop __GFP_ZERO flag from DMA allocation Jean-Philippe Brucker
2020-01-15 12:52 ` [PATCH v5 02/13] dt-bindings: document PASID property for IOMMU masters Jean-Philippe Brucker
2020-01-15 12:52 ` [PATCH v5 03/13] iommu/arm-smmu-v3: Parse PASID devicetree property of platform devices Jean-Philippe Brucker
2020-01-15 12:52 ` Jean-Philippe Brucker [this message]
2020-01-15 12:52 ` [PATCH v5 05/13] iommu/arm-smmu-v3: Prepare arm_smmu_s1_cfg for SSID support Jean-Philippe Brucker
2020-01-15 12:52 ` [PATCH v5 06/13] iommu/arm-smmu-v3: Add context descriptor tables allocators Jean-Philippe Brucker
2020-01-15 12:52 ` [PATCH v5 07/13] iommu/arm-smmu-v3: Add support for Substream IDs Jean-Philippe Brucker
2020-01-15 12:52 ` [PATCH v5 08/13] iommu/arm-smmu-v3: Propagate ssid_bits Jean-Philippe Brucker
2020-01-15 12:52 ` [PATCH v5 09/13] iommu/arm-smmu-v3: Prepare for handling arm_smmu_write_ctx_desc() failure Jean-Philippe Brucker
2020-01-15 12:52 ` [PATCH v5 10/13] iommu/arm-smmu-v3: Add second level of context descriptor table Jean-Philippe Brucker
2020-01-15 12:52 ` [PATCH v5 11/13] iommu/arm-smmu-v3: Improve add_device() error handling Jean-Philippe Brucker
2020-01-15 12:52 ` [PATCH v5 12/13] PCI/ATS: Add PASID stubs Jean-Philippe Brucker
2020-01-15 12:52 ` [PATCH v5 13/13] iommu/arm-smmu-v3: Add support for PCI PASID Jean-Philippe Brucker
2020-01-15 16:42 ` [PATCH v5 00/13] iommu: Add PASID support to Arm SMMUv3 Will Deacon
2020-01-15 18:29   ` Jean-Philippe Brucker

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