swiotlb: Make swiotlb bookkeeping functions visible in the header file.
We put the functions dealing with the operations on
the SWIOTLB buffer in the header and make those functions non-static.
And also make the functions exported via EXPORT_SYMBOL_GPL.
See "swiotlb: swiotlb: add swiotlb_tbl_map_single library function" for
full description of patchset.
[v2: swiotlb_sync_single_range_for_* no more. Remove usage.]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Acked-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Tested-by: Albert Herranz <albert_herranz@yahoo.es>
diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h
index 250d766..8c0e349 100644
--- a/include/linux/swiotlb.h
+++ b/include/linux/swiotlb.h
@@ -25,6 +25,28 @@
extern void swiotlb_init(int verbose);
extern void swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose);
+/*
+ * Enumeration for sync targets
+ */
+enum dma_sync_target {
+ SYNC_FOR_CPU = 0,
+ SYNC_FOR_DEVICE = 1,
+};
+extern void *swiotlb_tbl_map_single(struct device *hwdev, dma_addr_t tbl_dma_addr,
+ phys_addr_t phys, size_t size,
+ enum dma_data_direction dir);
+
+extern void swiotlb_tbl_unmap_single(struct device *hwdev, char *dma_addr,
+ size_t size, enum dma_data_direction dir);
+
+extern void swiotlb_tbl_sync_single(struct device *hwdev, char *dma_addr,
+ size_t size, enum dma_data_direction dir,
+ enum dma_sync_target target);
+
+/* Accessory functions. */
+extern void swiotlb_bounce(phys_addr_t phys, char *dma_addr, size_t size,
+ enum dma_data_direction dir);
+
extern void
*swiotlb_alloc_coherent(struct device *hwdev, size_t size,
dma_addr_t *dma_handle, gfp_t flags);
diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index 5f60157..34e3082 100644
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -50,14 +50,6 @@
*/
#define IO_TLB_MIN_SLABS ((1<<20) >> IO_TLB_SHIFT)
-/*
- * Enumeration for sync targets
- */
-enum dma_sync_target {
- SYNC_FOR_CPU = 0,
- SYNC_FOR_DEVICE = 1,
-};
-
int swiotlb_force;
/*
@@ -335,8 +327,8 @@
/*
* Bounce: copy the swiotlb buffer back to the original dma location
*/
-static void swiotlb_bounce(phys_addr_t phys, char *dma_addr, size_t size,
- enum dma_data_direction dir)
+void swiotlb_bounce(phys_addr_t phys, char *dma_addr, size_t size,
+ enum dma_data_direction dir)
{
unsigned long pfn = PFN_DOWN(phys);
@@ -372,6 +364,7 @@
memcpy(phys_to_virt(phys), dma_addr, size);
}
}
+EXPORT_SYMBOL_GPL(swiotlb_bounce);
void *swiotlb_tbl_map_single(struct device *hwdev, dma_addr_t tbl_dma_addr,
phys_addr_t phys, size_t size,
@@ -476,6 +469,7 @@
return dma_addr;
}
+EXPORT_SYMBOL_GPL(swiotlb_tbl_map_single);
/*
* Allocates bounce buffer and returns its kernel virtual address.
@@ -493,7 +487,7 @@
/*
* dma_addr is the kernel virtual address of the bounce buffer to unmap.
*/
-static void
+void
swiotlb_tbl_unmap_single(struct device *hwdev, char *dma_addr, size_t size,
enum dma_data_direction dir)
{
@@ -533,10 +527,12 @@
}
spin_unlock_irqrestore(&io_tlb_lock, flags);
}
+EXPORT_SYMBOL_GPL(swiotlb_tbl_unmap_single);
-static void
+void
swiotlb_tbl_sync_single(struct device *hwdev, char *dma_addr, size_t size,
- enum dma_data_direction dir, int target)
+ enum dma_data_direction dir,
+ enum dma_sync_target target)
{
int index = (dma_addr - io_tlb_start) >> IO_TLB_SHIFT;
phys_addr_t phys = io_tlb_orig_addr[index];
@@ -560,6 +556,7 @@
BUG();
}
}
+EXPORT_SYMBOL_GPL(swiotlb_tbl_sync_single);
void *
swiotlb_alloc_coherent(struct device *hwdev, size_t size,
@@ -748,7 +745,8 @@
*/
static void
swiotlb_sync_single(struct device *hwdev, dma_addr_t dev_addr,
- size_t size, enum dma_data_direction dir, int target)
+ size_t size, enum dma_data_direction dir,
+ enum dma_sync_target target)
{
phys_addr_t paddr = dma_to_phys(hwdev, dev_addr);
@@ -877,7 +875,8 @@
*/
static void
swiotlb_sync_sg(struct device *hwdev, struct scatterlist *sgl,
- int nelems, enum dma_data_direction dir, int target)
+ int nelems, enum dma_data_direction dir,
+ enum dma_sync_target target)
{
struct scatterlist *sg;
int i;