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| author |   Shameer Kolothum <shameerali.kolothum.thodi@huawei.com> | 2018-02-13 15:20:50 +0000 |
|---|---|---|
| committer |   Joerg Roedel <jroedel@suse.de> | 2018-02-14 15:15:41 +0100 |
| commit | 8b4282e6b8e239d8ce68ab884c89335cc6fdd7c7 (patch) | |
| tree | 782cac410eacd34f3a7ebcdb2ef448e7466babdb /include/linux/acpi_iort.h | |
| parent | iommu/io-pgtable: Use size_t return type for all foo_unmap (diff) | |
| download | linux-dev-8b4282e6b8e239d8ce68ab884c89335cc6fdd7c7.tar.xz linux-dev-8b4282e6b8e239d8ce68ab884c89335cc6fdd7c7.zip | |
ACPI/IORT: Add msi address regions reservation helper
On some platforms msi parent address regions have to be excluded from
normal IOVA allocation in that they are detected and decoded in a HW
specific way by system components and so they cannot be considered normal
IOVA address space.
Add a helper function that retrieves ITS address regions - the msi
parent - through IORT device <-> ITS mappings and reserves it so that
these regions will not be translated by IOMMU and will be excluded from
IOVA allocations. The function checks for the smmu model number and
only applies the msi reservation if the platform requires it.
Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Reviewed-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
[For the ITS part]
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'include/linux/acpi_iort.h')
| -rw-r--r-- | include/linux/acpi_iort.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/include/linux/acpi_iort.h b/include/linux/acpi_iort.h index 2f7a29242b87..38cd77b39a64 100644 --- a/include/linux/acpi_iort.h +++ b/include/linux/acpi_iort.h @@ -26,7 +26,8 @@ #define IORT_IRQ_MASK(irq) (irq & 0xffffffffULL) #define IORT_IRQ_TRIGGER_MASK(irq) ((irq >> 32) & 0xffffffffULL) -int iort_register_domain_token(int trans_id, struct fwnode_handle *fw_node); +int iort_register_domain_token(int trans_id, phys_addr_t base, + struct fwnode_handle *fw_node); void iort_deregister_domain_token(int trans_id); struct fwnode_handle *iort_find_domain_token(int trans_id); #ifdef CONFIG_ACPI_IORT @@ -38,6 +39,7 @@ int iort_pmsi_get_dev_id(struct device *dev, u32 *dev_id); /* IOMMU interface */ void iort_dma_setup(struct device *dev, u64 *dma_addr, u64 *size); const struct iommu_ops *iort_iommu_configure(struct device *dev); +int iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head); #else static inline void acpi_iort_init(void) { } static inline u32 iort_msi_map_rid(struct device *dev, u32 req_id) @@ -52,6 +54,9 @@ static inline void iort_dma_setup(struct device *dev, u64 *dma_addr, static inline const struct iommu_ops *iort_iommu_configure( struct device *dev) { return NULL; } +static inline +int iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head) +{ return 0; } #endif #endif /* __ACPI_IORT_H__ */ |