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 3/9] ACPI/IORT: Provide a generic helper to retrieve reserve regions
Date: Wed, 20 Apr 2022 17:48:30 +0100 [thread overview]
Message-ID: <20220420164836.1181-4-shameerali.kolothum.thodi@huawei.com> (raw)
In-Reply-To: <20220420164836.1181-1-shameerali.kolothum.thodi@huawei.com>
Currently IORT provides a helper to retrieve HW MSI reserve regions.
Change this to a generic helper to retrieve any IORT related reserve
regions. This will be useful when we add support for RMR nodes in
subsequent patches.
[Lorenzo: For ACPI IORT]
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 | 22 +++++++++++++++-------
drivers/iommu/dma-iommu.c | 2 +-
include/linux/acpi_iort.h | 4 ++--
3 files changed, 18 insertions(+), 10 deletions(-)
diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c
index 213f61cae176..cd5d1d7823cb 100644
--- a/drivers/acpi/arm64/iort.c
+++ b/drivers/acpi/arm64/iort.c
@@ -806,15 +806,13 @@ static struct acpi_iort_node *iort_get_msi_resv_iommu(struct device *dev)
return NULL;
}
-/**
- * iort_iommu_msi_get_resv_regions - Reserved region driver helper
- * @dev: Device from iommu_get_resv_regions()
- * @head: Reserved region list from iommu_get_resv_regions()
- *
+/*
+ * Retrieve platform specific HW MSI reserve regions.
* The ITS interrupt translation spaces (ITS_base + SZ_64K, SZ_64K)
* associated with the device are the HW MSI reserved regions.
*/
-void iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head)
+static void iort_iommu_msi_get_resv_regions(struct device *dev,
+ struct list_head *head)
{
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
struct acpi_iort_its_group *its;
@@ -863,6 +861,16 @@ void iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head)
}
}
+/**
+ * iort_iommu_get_resv_regions - Generic helper to retrieve reserved regions.
+ * @dev: Device from iommu_get_resv_regions()
+ * @head: Reserved region list from iommu_get_resv_regions()
+ */
+void iort_iommu_get_resv_regions(struct device *dev, struct list_head *head)
+{
+ iort_iommu_msi_get_resv_regions(dev, head);
+}
+
static inline bool iort_iommu_driver_enabled(u8 type)
{
switch (type) {
@@ -1027,7 +1035,7 @@ int iort_iommu_configure_id(struct device *dev, const u32 *id_in)
}
#else
-void iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head)
+void iort_iommu_get_resv_regions(struct device *dev, struct list_head *head)
{ }
int iort_iommu_configure_id(struct device *dev, const u32 *input_id)
{ return -ENODEV; }
diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index 09f6e1c0f9c0..93d76b666888 100644
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -384,7 +384,7 @@ void iommu_dma_get_resv_regions(struct device *dev, struct list_head *list)
{
if (!is_of_node(dev_iommu_fwspec_get(dev)->iommu_fwnode))
- iort_iommu_msi_get_resv_regions(dev, list);
+ iort_iommu_get_resv_regions(dev, list);
}
EXPORT_SYMBOL(iommu_dma_get_resv_regions);
diff --git a/include/linux/acpi_iort.h b/include/linux/acpi_iort.h
index a8198b83753d..e5d2de9caf7f 100644
--- a/include/linux/acpi_iort.h
+++ b/include/linux/acpi_iort.h
@@ -36,7 +36,7 @@ int iort_pmsi_get_dev_id(struct device *dev, u32 *dev_id);
/* IOMMU interface */
int iort_dma_get_ranges(struct device *dev, u64 *size);
int iort_iommu_configure_id(struct device *dev, const u32 *id_in);
-void iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head);
+void iort_iommu_get_resv_regions(struct device *dev, struct list_head *head);
phys_addr_t acpi_iort_dma_get_max_cpu_address(void);
#else
static inline void acpi_iort_init(void) { }
@@ -52,7 +52,7 @@ static inline int iort_dma_get_ranges(struct device *dev, u64 *size)
static inline int iort_iommu_configure_id(struct device *dev, const u32 *id_in)
{ return -ENODEV; }
static inline
-void iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head)
+void iort_iommu_get_resv_regions(struct device *dev, struct list_head *head)
{ }
static inline phys_addr_t acpi_iort_dma_get_max_cpu_address(void)
--
2.17.1
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next prev parent reply other threads:[~2022-04-20 16:51 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 ` Shameer Kolothum [this message]
2022-04-21 6:44 ` [PATCH v10 3/9] ACPI/IORT: Provide a generic helper to retrieve reserve regions 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 ` [PATCH v10 5/9] ACPI/IORT: Add a helper to retrieve RMR info directly Shameer Kolothum
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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