There is nothing wrong in having a loadable module implementing DMA API,
for example to be used for sub-devices registered by the module. However,
most of the functions from dma-iommu do not have their symbols exported,
making it impossible to use them from loadable modules.
Export all the non-static functions in the file, so that loadable modules
can benefit from them. Use EXPORT_SYMBOL() for consistency with other
exports in the file.
Signed-off-by: Tomasz Figa <tf...@chromium.org>
---
drivers/iommu/dma-iommu.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index 9d1cebe7f6cb..7cdeaf930106 100644
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -80,6 +80,7 @@ int iommu_dma_init(void)
{
return iova_cache_get();
}
+EXPORT_SYMBOL(iommu_dma_init);
/**
* iommu_get_dma_cookie - Acquire DMA-API resources for a domain
@@ -357,6 +358,7 @@ int dma_info_to_prot(enum dma_data_direction dir, bool
coherent,
return 0;
}
}
+EXPORT_SYMBOL(dma_info_to_prot);
static dma_addr_t iommu_dma_alloc_iova(struct iommu_domain *domain,
size_t size, dma_addr_t dma_limit, struct device *dev)
@@ -504,6 +506,7 @@ void iommu_dma_free(struct device *dev, struct page
**pages, size_t size,
__iommu_dma_free_pages(pages, PAGE_ALIGN(size) >> PAGE_SHIFT);
*handle = IOMMU_MAPPING_ERROR;
}
+EXPORT_SYMBOL(iommu_dma_free);
/**
* iommu_dma_alloc - Allocate and map a buffer contiguous in IOVA space
@@ -588,6 +591,7 @@ struct page **iommu_dma_alloc(struct device *dev, size_t
size, gfp_t gfp,
__iommu_dma_free_pages(pages, count);
return NULL;
}
+EXPORT_SYMBOL(iommu_dma_alloc);
/**
* iommu_dma_mmap - Map a buffer into provided user VMA
@@ -613,6 +617,7 @@ int iommu_dma_mmap(struct page **pages, size_t size, struct
vm_area_struct *vma)
}
return ret;
}
+EXPORT_SYMBOL(iommu_dma_mmap);
static dma_addr_t __iommu_dma_map(struct device *dev, phys_addr_t phys,
size_t size, int prot)
@@ -643,12 +648,14 @@ dma_addr_t iommu_dma_map_page(struct device *dev, struct
page *page,
{
return __iommu_dma_map(dev, page_to_phys(page) + offset, size, prot);
}
+EXPORT_SYMBOL(iommu_dma_map_page);
void iommu_dma_unmap_page(struct device *dev, dma_addr_t handle, size_t size,
enum dma_data_direction dir, unsigned long attrs)
{
__iommu_dma_unmap(iommu_get_domain_for_dev(dev), handle, size);
}
+EXPORT_SYMBOL(iommu_dma_unmap_page);
/*
* Prepare a successfully-mapped scatterlist to give back to the caller.
@@ -802,6 +809,7 @@ int iommu_dma_map_sg(struct device *dev, struct scatterlist
*sg,
__invalidate_sg(sg, nents);
return 0;
}
+EXPORT_SYMBOL(iommu_dma_map_sg);
void iommu_dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nents,
enum dma_data_direction dir, unsigned long attrs)
@@ -822,6 +830,7 @@ void iommu_dma_unmap_sg(struct device *dev, struct
scatterlist *sg, int nents,
end = sg_dma_address(sg) + sg_dma_len(sg);
__iommu_dma_unmap(iommu_get_domain_for_dev(dev), start, end - start);
}
+EXPORT_SYMBOL(iommu_dma_unmap_sg);
dma_addr_t iommu_dma_map_resource(struct device *dev, phys_addr_t phys,
size_t size, enum dma_data_direction dir, unsigned long attrs)
@@ -829,17 +838,20 @@ dma_addr_t iommu_dma_map_resource(struct device *dev,
phys_addr_t phys,
return __iommu_dma_map(dev, phys, size,
dma_info_to_prot(dir, false, attrs) | IOMMU_MMIO);
}
+EXPORT_SYMBOL(iommu_dma_map_resource);
void iommu_dma_unmap_resource(struct device *dev, dma_addr_t handle,
size_t size, enum dma_data_direction dir, unsigned long attrs)
{
__iommu_dma_unmap(iommu_get_domain_for_dev(dev), handle, size);
}
+EXPORT_SYMBOL(iommu_dma_unmap_resource);
int iommu_dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
return dma_addr == IOMMU_MAPPING_ERROR;
}
+EXPORT_SYMBOL(iommu_dma_mapping_error);
static struct iommu_dma_msi_page *iommu_dma_get_msi_page(struct device *dev,
phys_addr_t msi_addr, struct iommu_domain *domain)
@@ -913,3 +925,4 @@ void iommu_dma_map_msi_msg(int irq, struct msi_msg *msg)
msg->address_lo += lower_32_bits(msi_page->iova);
}
}
+EXPORT_SYMBOL(iommu_dma_map_msi_msg);
--
2.13.2.725.g09c95d1e9-goog
