From: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
To: <linux-arm-kernel@lists.infradead.org>,
<linux-acpi@vger.kernel.org>, <iommu@lists.linux-foundation.org>
Cc: <linuxarm@huawei.com>, <lorenzo.pieralisi@arm.com>,
<joro@8bytes.org>, <robin.murphy@arm.com>, <will@kernel.org>,
<wanghuiqiang@huawei.com>, <guohanjun@huawei.com>,
<steven.price@arm.com>, <Sami.Mujawar@arm.com>,
<jon@solid-run.com>, <eric.auger@redhat.com>,
<laurentiu.tudor@nxp.com>, <hch@infradead.org>
Subject: [PATCH v10 5/9] ACPI/IORT: Add a helper to retrieve RMR info directly
Date: Wed, 20 Apr 2022 17:48:32 +0100 [thread overview]
Message-ID: <20220420164836.1181-6-shameerali.kolothum.thodi@huawei.com> (raw)
In-Reply-To: <20220420164836.1181-1-shameerali.kolothum.thodi@huawei.com>
This will provide a way for SMMU drivers to retrieve StreamIDs
associated with IORT RMR nodes and use that to set bypass settings
for those IDs.
Reviewed-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Tested-by: Steven Price <steven.price@arm.com>
Tested-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
---
drivers/acpi/arm64/iort.c | 30 ++++++++++++++++++++++++++++++
include/linux/acpi_iort.h | 8 ++++++++
2 files changed, 38 insertions(+)
diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c
index 8b189e9eca95..971904b2205f 100644
--- a/drivers/acpi/arm64/iort.c
+++ b/drivers/acpi/arm64/iort.c
@@ -1367,6 +1367,36 @@ int iort_dma_get_ranges(struct device *dev, u64 *size)
return nc_dma_get_range(dev, size);
}
+/**
+ * iort_get_rmr_sids - Retrieve IORT RMR node reserved regions with
+ * associated StreamIDs information.
+ * @iommu_fwnode: fwnode associated with IOMMU
+ * @head: Resereved region list
+ */
+void iort_get_rmr_sids(struct fwnode_handle *iommu_fwnode,
+ struct list_head *head)
+{
+ iort_iommu_rmr_get_resv_regions(iommu_fwnode, NULL, head);
+}
+EXPORT_SYMBOL_GPL(iort_get_rmr_sids);
+
+/**
+ * iort_put_rmr_sids - Free all the memory allocated for RMR reserved regions.
+ * @iommu_fwnode: fwnode associated with IOMMU
+ * @head: Resereved region list
+ */
+void iort_put_rmr_sids(struct fwnode_handle *iommu_fwnode,
+ struct list_head *head)
+{
+ struct iommu_resv_region *entry, *next;
+
+ list_for_each_entry_safe(entry, next, head, list) {
+ kfree(entry->fw_data.rmr.sids);
+ kfree(entry);
+ }
+}
+EXPORT_SYMBOL_GPL(iort_put_rmr_sids);
+
static void __init acpi_iort_register_irq(int hwirq, const char *name,
int trigger,
struct resource *res)
diff --git a/include/linux/acpi_iort.h b/include/linux/acpi_iort.h
index e5d2de9caf7f..b43be0987b19 100644
--- a/include/linux/acpi_iort.h
+++ b/include/linux/acpi_iort.h
@@ -33,6 +33,10 @@ struct irq_domain *iort_get_device_domain(struct device *dev, u32 id,
enum irq_domain_bus_token bus_token);
void acpi_configure_pmsi_domain(struct device *dev);
int iort_pmsi_get_dev_id(struct device *dev, u32 *dev_id);
+void iort_get_rmr_sids(struct fwnode_handle *iommu_fwnode,
+ struct list_head *head);
+void iort_put_rmr_sids(struct fwnode_handle *iommu_fwnode,
+ struct list_head *head);
/* IOMMU interface */
int iort_dma_get_ranges(struct device *dev, u64 *size);
int iort_iommu_configure_id(struct device *dev, const u32 *id_in);
@@ -46,6 +50,10 @@ static inline struct irq_domain *iort_get_device_domain(
struct device *dev, u32 id, enum irq_domain_bus_token bus_token)
{ return NULL; }
static inline void acpi_configure_pmsi_domain(struct device *dev) { }
+static inline
+void iort_get_rmr_sids(struct fwnode_handle *iommu_fwnode, struct list_head *head) { }
+static inline
+void iort_put_rmr_sids(struct fwnode_handle *iommu_fwnode, struct list_head *head) { }
/* IOMMU interface */
static inline int iort_dma_get_ranges(struct device *dev, u64 *size)
{ return -ENODEV; }
--
2.17.1
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next prev parent reply other threads:[~2022-04-20 16:52 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-20 16:48 [PATCH v10 0/9] ACPI/IORT: Support for IORT RMR node Shameer Kolothum
2022-04-20 16:48 ` [PATCH v10 1/9] iommu: Introduce a union to struct iommu_resv_region Shameer Kolothum
2022-04-21 6:46 ` Christoph Hellwig
2022-04-20 16:48 ` [PATCH v10 2/9] ACPI/IORT: Make iort_iommu_msi_get_resv_regions() return void Shameer Kolothum
2022-04-21 6:44 ` Christoph Hellwig
2022-04-20 16:48 ` [PATCH v10 3/9] ACPI/IORT: Provide a generic helper to retrieve reserve regions Shameer Kolothum
2022-04-21 6:44 ` Christoph Hellwig
2022-04-20 16:48 ` [PATCH v10 4/9] ACPI/IORT: Add support to retrieve IORT RMR reserved regions Shameer Kolothum
2022-04-21 6:48 ` Christoph Hellwig
2022-04-21 14:50 ` Shameerali Kolothum Thodi
2022-04-20 16:48 ` Shameer Kolothum [this message]
2022-04-20 16:48 ` [PATCH v10 6/9] iommu/arm-smmu-v3: Introduce strtab init helper Shameer Kolothum
2022-04-20 16:48 ` [PATCH v10 7/9] iommu/arm-smmu-v3: Refactor arm_smmu_init_bypass_stes() to force bypass Shameer Kolothum
2022-04-20 16:48 ` [PATCH v10 8/9] iommu/arm-smmu-v3: Get associated RMR info and install bypass STE Shameer Kolothum
2022-04-20 16:48 ` [PATCH v10 9/9] iommu/arm-smmu: Get associated RMR info and install bypass SMR Shameer Kolothum
2022-04-21 12:58 ` [PATCH v10 0/9] ACPI/IORT: Support for IORT RMR node Steven Price
2022-04-21 14:43 ` Shameerali Kolothum Thodi
2022-04-21 15:45 ` Robin Murphy
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