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| author | Eric Auger <eric.auger@redhat.com> | 2017-01-19 20:57:49 +0000 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2017-01-23 11:48:16 +0000 |
| commit | 2b20cbba3390a55c511acba2f0f517dd27a528b2 (patch) | |
| tree | f88d74a181db5f6d0b7c801c51ab18db26ab16ed | |
| parent | d30ddcaa7b028049cdfee3a40248002d07b2bbf3 (diff) | |
| download | linux-2b20cbba3390a55c511acba2f0f517dd27a528b2.tar.gz linux-2b20cbba3390a55c511acba2f0f517dd27a528b2.tar.bz2 linux-2b20cbba3390a55c511acba2f0f517dd27a528b2.zip | |
iommu: iommu_alloc_resv_region
Introduce a new helper serving the purpose to allocate a reserved
region. This will be used in iommu driver implementing reserved
region callbacks.
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Tomasz Nowicki <tomasz.nowicki@caviumnetworks.com>
Tested-by: Tomasz Nowicki <tomasz.nowicki@caviumnetworks.com>
Tested-by: Bharat Bhushan <bharat.bhushan@nxp.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
| -rw-r--r-- | drivers/iommu/iommu.c | 18 | ||||
| -rw-r--r-- | include/linux/iommu.h | 2 |
2 files changed, 20 insertions, 0 deletions
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 1cee5c361c21..927878d0a612 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -1575,6 +1575,24 @@ void iommu_put_resv_regions(struct device *dev, struct list_head *list) ops->put_resv_regions(dev, list); } +struct iommu_resv_region *iommu_alloc_resv_region(phys_addr_t start, + size_t length, + int prot, int type) +{ + struct iommu_resv_region *region; + + region = kzalloc(sizeof(*region), GFP_KERNEL); + if (!region) + return NULL; + + INIT_LIST_HEAD(®ion->list); + region->start = start; + region->length = length; + region->prot = prot; + region->type = type; + return region; +} + /* Request that a device is direct mapped by the IOMMU */ int iommu_request_dm_for_dev(struct device *dev) { diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 233a6bf093bf..f6bb55d3e606 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -244,6 +244,8 @@ extern void iommu_set_fault_handler(struct iommu_domain *domain, extern void iommu_get_resv_regions(struct device *dev, struct list_head *list); extern void iommu_put_resv_regions(struct device *dev, struct list_head *list); extern int iommu_request_dm_for_dev(struct device *dev); +extern struct iommu_resv_region * +iommu_alloc_resv_region(phys_addr_t start, size_t length, int prot, int type); extern int iommu_attach_group(struct iommu_domain *domain, struct iommu_group *group); |