The function is declared in drm_cache.h. I also removed the curly
braces from the for loop to adhere to kernel coding style.
Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
---
drivers/gpu/drm/drm_cache.c | 32 ++++++++++++++++++++++++++++++++
drivers/gpu/drm/drm_memory.c | 33 ---------------------------------
2 files changed, 32 insertions(+), 33 deletions(-)
diff --git a/drivers/gpu/drm/drm_cache.c b/drivers/gpu/drm/drm_cache.c
index 0fe3c496002a..49551a7fa22f 100644
--- a/drivers/gpu/drm/drm_cache.c
+++ b/drivers/gpu/drm/drm_cache.c
@@ -30,6 +30,7 @@
#include <linux/export.h>
#include <linux/highmem.h>
+#include <xen/xen.h>
#include <drm/drm_cache.h>
@@ -176,3 +177,34 @@ drm_clflush_virt_range(void *addr, unsigned long length)
#endif
}
EXPORT_SYMBOL(drm_clflush_virt_range);
+
+bool drm_need_swiotlb(int dma_bits)
+{
+ struct resource *tmp;
+ resource_size_t max_iomem = 0;
+
+ /*
+ * Xen paravirtual hosts require swiotlb regardless of requested dma
+ * transfer size.
+ *
+ * NOTE: Really, what it requires is use of the dma_alloc_coherent
+ * allocator used in ttm_dma_populate() instead of
+ * ttm_populate_and_map_pages(), which bounce buffers so much in
+ * Xen it leads to swiotlb buffer exhaustion.
+ */
+ if (xen_pv_domain())
+ return true;
+
+ /*
+ * Enforce dma_alloc_coherent when memory encryption is active as well
+ * for the same reasons as for Xen paravirtual hosts.
+ */
+ if (mem_encrypt_active())
+ return true;
+
+ for (tmp = iomem_resource.child; tmp; tmp = tmp->sibling)
+ max_iomem = max(max_iomem, tmp->end);
+
+ return max_iomem > ((u64)1 << dma_bits);
+}
+EXPORT_SYMBOL(drm_need_swiotlb);
diff --git a/drivers/gpu/drm/drm_memory.c b/drivers/gpu/drm/drm_memory.c
index f4f2bffdd5bd..e4f20a2eb6e7 100644
--- a/drivers/gpu/drm/drm_memory.c
+++ b/drivers/gpu/drm/drm_memory.c
@@ -37,7 +37,6 @@
#include <linux/highmem.h>
#include <linux/pci.h>
#include <linux/vmalloc.h>
-#include <xen/xen.h>
#include <drm/drm_agpsupport.h>
#include <drm/drm_cache.h>
@@ -138,35 +137,3 @@ void drm_legacy_ioremapfree(struct drm_local_map *map, struct drm_device *dev)
iounmap(map->handle);
}
EXPORT_SYMBOL(drm_legacy_ioremapfree);
-
-bool drm_need_swiotlb(int dma_bits)
-{
- struct resource *tmp;
- resource_size_t max_iomem = 0;
-
- /*
- * Xen paravirtual hosts require swiotlb regardless of requested dma
- * transfer size.
- *
- * NOTE: Really, what it requires is use of the dma_alloc_coherent
- * allocator used in ttm_dma_populate() instead of
- * ttm_populate_and_map_pages(), which bounce buffers so much in
- * Xen it leads to swiotlb buffer exhaustion.
- */
- if (xen_pv_domain())
- return true;
-
- /*
- * Enforce dma_alloc_coherent when memory encryption is active as well
- * for the same reasons as for Xen paravirtual hosts.
- */
- if (mem_encrypt_active())
- return true;
-
- for (tmp = iomem_resource.child; tmp; tmp = tmp->sibling) {
- max_iomem = max(max_iomem, tmp->end);
- }
-
- return max_iomem > ((u64)1 << dma_bits);
-}
-EXPORT_SYMBOL(drm_need_swiotlb);
--
2.29.2
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