From: Auger Eric <eric.auger@redhat.com>
To: Jean-Philippe Brucker <jean-philippe@linaro.org>,
joro@8bytes.org, will@kernel.org
Cc: devicetree@vger.kernel.org, kevin.tian@intel.com,
vivek.gautam@arm.com, guohanjun@huawei.com, rjw@rjwysocki.net,
linux-acpi@vger.kernel.org, iommu@lists.linux-foundation.org,
robh+dt@kernel.org, linux-accelerators@lists.ozlabs.org,
sudeep.holla@arm.com, zhangfei.gao@linaro.org,
robin.murphy@arm.com, linux-arm-kernel@lists.infradead.org,
lenb@kernel.org
Subject: Re: [PATCH v12 02/10] iommu/arm-smmu-v3: Use device properties for pasid-num-bits
Date: Mon, 1 Feb 2021 08:30:20 +0100 [thread overview]
Message-ID: <ce05e0e7-8ccc-0a9e-0762-64a41d05b33c@redhat.com> (raw)
In-Reply-To: <20210127154322.3959196-3-jean-philippe@linaro.org>
Hi,
On 1/27/21 4:43 PM, Jean-Philippe Brucker wrote:
> The pasid-num-bits property shouldn't need a dedicated fwspec field,
> it's a job for device properties. Add properties for IORT, and access
> the number of PASID bits using device_property_read_u32().
>
> Suggested-by: Robin Murphy <robin.murphy@arm.com>
> Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Eric
> ---
> include/linux/iommu.h | 2 --
> drivers/acpi/arm64/iort.c | 13 +++++++------
> drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 3 ++-
> drivers/iommu/of_iommu.c | 5 -----
> 4 files changed, 9 insertions(+), 14 deletions(-)
>
> diff --git a/include/linux/iommu.h b/include/linux/iommu.h
> index bdf3f34a4457..b7ea11fc1a93 100644
> --- a/include/linux/iommu.h
> +++ b/include/linux/iommu.h
> @@ -571,7 +571,6 @@ struct iommu_group *fsl_mc_device_group(struct device *dev);
> * @ops: ops for this device's IOMMU
> * @iommu_fwnode: firmware handle for this device's IOMMU
> * @flags: IOMMU_FWSPEC_* flags
> - * @num_pasid_bits: number of PASID bits supported by this device
> * @num_ids: number of associated device IDs
> * @ids: IDs which this device may present to the IOMMU
> */
> @@ -579,7 +578,6 @@ struct iommu_fwspec {
> const struct iommu_ops *ops;
> struct fwnode_handle *iommu_fwnode;
> u32 flags;
> - u32 num_pasid_bits;
> unsigned int num_ids;
> u32 ids[];
> };
> diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c
> index d4eac6d7e9fb..c9a8bbb74b09 100644
> --- a/drivers/acpi/arm64/iort.c
> +++ b/drivers/acpi/arm64/iort.c
> @@ -968,15 +968,16 @@ static int iort_pci_iommu_init(struct pci_dev *pdev, u16 alias, void *data)
> static void iort_named_component_init(struct device *dev,
> struct acpi_iort_node *node)
> {
> + struct property_entry props[2] = {};
> 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);
> + props[0] = PROPERTY_ENTRY_U32("pasid-num-bits",
> + FIELD_GET(ACPI_IORT_NC_PASID_BITS,
> + nc->node_flags));
> +
> + if (device_add_properties(dev, props))
> + dev_warn(dev, "Could not add device properties\n");
> }
>
> static int iort_nc_iommu_map(struct device *dev, struct acpi_iort_node *node)
> diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
> index baebaac34a83..88dd9feb32f4 100644
> --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
> +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
> @@ -2392,7 +2392,8 @@ static struct iommu_device *arm_smmu_probe_device(struct device *dev)
> }
> }
>
> - master->ssid_bits = min(smmu->ssid_bits, fwspec->num_pasid_bits);
> + device_property_read_u32(dev, "pasid-num-bits", &master->ssid_bits);
> + master->ssid_bits = min(smmu->ssid_bits, master->ssid_bits);
>
> /*
> * Note that PASID must be enabled before, and disabled after ATS:
> diff --git a/drivers/iommu/of_iommu.c b/drivers/iommu/of_iommu.c
> index e505b9130a1c..a9d2df001149 100644
> --- a/drivers/iommu/of_iommu.c
> +++ b/drivers/iommu/of_iommu.c
> @@ -210,11 +210,6 @@ const struct iommu_ops *of_iommu_configure(struct device *dev,
> of_pci_iommu_init, &info);
> } else {
> err = of_iommu_configure_device(master_np, dev, id);
> -
> - fwspec = dev_iommu_fwspec_get(dev);
> - if (!err && fwspec)
> - of_property_read_u32(master_np, "pasid-num-bits",
> - &fwspec->num_pasid_bits);
> }
>
> /*
>
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next prev parent reply other threads:[~2021-02-01 7:30 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-27 15:43 [PATCH v12 00/10] iommu: I/O page faults for SMMUv3 Jean-Philippe Brucker
2021-01-27 15:43 ` [PATCH v12 01/10] iommu: Fix comment for struct iommu_fwspec Jean-Philippe Brucker
2021-01-27 15:43 ` [PATCH v12 02/10] iommu/arm-smmu-v3: Use device properties for pasid-num-bits Jean-Philippe Brucker
2021-02-01 7:30 ` Auger Eric [this message]
2021-01-27 15:43 ` [PATCH v12 03/10] iommu: Separate IOMMU_DEV_FEAT_IOPF from IOMMU_DEV_FEAT_SVA Jean-Philippe Brucker
2021-02-01 7:35 ` Auger Eric
2021-01-27 15:43 ` [PATCH v12 04/10] iommu/vt-d: Support IOMMU_DEV_FEAT_IOPF Jean-Philippe Brucker
2021-01-27 15:43 ` [PATCH v12 05/10] uacce: Enable IOMMU_DEV_FEAT_IOPF Jean-Philippe Brucker
2021-01-27 15:43 ` [PATCH v12 06/10] iommu: Add a page fault handler Jean-Philippe Brucker
2021-01-31 18:29 ` Auger Eric
2021-02-02 5:51 ` Shenming Lu
2021-01-27 15:43 ` [PATCH v12 07/10] iommu/arm-smmu-v3: Maintain a SID->device structure Jean-Philippe Brucker
2021-01-27 15:43 ` [PATCH v12 08/10] dt-bindings: document stall property for IOMMU masters Jean-Philippe Brucker
2021-02-01 7:28 ` Auger Eric
2021-01-27 15:43 ` [PATCH v12 09/10] ACPI/IORT: Enable stall support for platform devices Jean-Philippe Brucker
2021-01-27 15:43 ` [PATCH v12 10/10] iommu/arm-smmu-v3: Add " Jean-Philippe Brucker
2021-01-31 18:29 ` Auger Eric
2021-02-01 11:12 ` Jean-Philippe Brucker
2021-02-01 13:16 ` Auger Eric
2021-02-01 15:19 ` Jean-Philippe Brucker
2021-02-01 1:18 ` Zhou Wang
2021-02-01 11:14 ` Jean-Philippe Brucker
2021-02-01 12:53 ` Zhou Wang
2021-02-26 9:43 ` Zhou Wang
2021-02-26 16:29 ` Jean-Philippe Brucker
2021-02-27 3:40 ` Zhou Wang
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