drm,io-mapping: Specify slot to use for atomic mappings

This is required should we ever attempt to use an io-mapping where
KM_USER0 is verboten, such as inside an IRQ context.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 10 insertions, 6 deletions

diff --git a/include/linux/io-mapping.h b/include/linux/io-mapping.h
index 25085ddd955f..e0ea40f6c515 100644
--- a/include/linux/io-mapping.h
+++ b/include/linux/io-mapping.h
@@ -79,7 +79,9 @@ io_mapping_free(struct io_mapping *mapping)
 
 /* Atomic map/unmap */
 static inline void *
-io_mapping_map_atomic_wc(struct io_mapping *mapping, unsigned long offset)
+io_mapping_map_atomic_wc(struct io_mapping *mapping,
+                         unsigned long offset,
+                         int slot)
 {
         resource_size_t phys_addr;
         unsigned long pfn;
@@ -87,13 +89,13 @@ io_mapping_map_atomic_wc(struct io_mapping *mapping, unsigned long offset)
         BUG_ON(offset >= mapping->size);
         phys_addr = mapping->base + offset;
         pfn = (unsigned long) (phys_addr >> PAGE_SHIFT);
-        return iomap_atomic_prot_pfn(pfn, KM_USER0, mapping->prot);
+        return iomap_atomic_prot_pfn(pfn, slot, mapping->prot);
 }
 
 static inline void
-io_mapping_unmap_atomic(void *vaddr)
+io_mapping_unmap_atomic(void *vaddr, int slot)
 {
-        iounmap_atomic(vaddr, KM_USER0);
+        iounmap_atomic(vaddr, slot);
 }
 
 static inline void *
@@ -133,13 +135,15 @@ io_mapping_free(struct io_mapping *mapping)
 
 /* Atomic map/unmap */
 static inline void *
-io_mapping_map_atomic_wc(struct io_mapping *mapping, unsigned long offset)
+io_mapping_map_atomic_wc(struct io_mapping *mapping,
+                         unsigned long offset,
+                         int slot)
 {
         return ((char *) mapping) + offset;
 }
 
 static inline void
-io_mapping_unmap_atomic(void *vaddr)
+io_mapping_unmap_atomic(void *vaddr, int slot)
 {
 }