Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetoot...

[cascardo/linux.git] / include / rdma / ib_umem.h

diff --git a/include/rdma/ib_umem.h b/include/rdma/ib_umem.h
index a2bf41e..2d83cfd 100644 (file)
--- a/include/rdma/ib_umem.h
+++ b/include/rdma/ib_umem.h
@@ -38,11 +38,12 @@
 #include <linux/workqueue.h>
 
 struct ib_ucontext;
+struct ib_umem_odp;
 
 struct ib_umem {
        struct ib_ucontext     *context;
        size_t                  length;
-       int                     offset;
+       unsigned long           address;
        int                     page_size;
        int                     writable;
        int                     hugetlb;
@@ -50,17 +51,43 @@ struct ib_umem {
        struct pid             *pid;
        struct mm_struct       *mm;
        unsigned long           diff;
+       struct ib_umem_odp     *odp_data;
        struct sg_table sg_head;
        int             nmap;
        int             npages;
 };
 
+/* Returns the offset of the umem start relative to the first page. */
+static inline int ib_umem_offset(struct ib_umem *umem)
+{
+       return umem->address & ((unsigned long)umem->page_size - 1);
+}
+
+/* Returns the first page of an ODP umem. */
+static inline unsigned long ib_umem_start(struct ib_umem *umem)
+{
+       return umem->address - ib_umem_offset(umem);
+}
+
+/* Returns the address of the page after the last one of an ODP umem. */
+static inline unsigned long ib_umem_end(struct ib_umem *umem)
+{
+       return PAGE_ALIGN(umem->address + umem->length);
+}
+
+static inline size_t ib_umem_num_pages(struct ib_umem *umem)
+{
+       return (ib_umem_end(umem) - ib_umem_start(umem)) >> PAGE_SHIFT;
+}
+
 #ifdef CONFIG_INFINIBAND_USER_MEM
 
 struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr,
                            size_t size, int access, int dmasync);
 void ib_umem_release(struct ib_umem *umem);
 int ib_umem_page_count(struct ib_umem *umem);
+int ib_umem_copy_from(void *dst, struct ib_umem *umem, size_t offset,
+                     size_t length);
 
 #else /* CONFIG_INFINIBAND_USER_MEM */
 
@@ -73,7 +100,10 @@ static inline struct ib_umem *ib_umem_get(struct ib_ucontext *context,
 }
 static inline void ib_umem_release(struct ib_umem *umem) { }
 static inline int ib_umem_page_count(struct ib_umem *umem) { return 0; }
-
+static inline int ib_umem_copy_from(void *dst, struct ib_umem *umem, size_t offset,
+                                   size_t length) {
+       return -EINVAL;
+}
 #endif /* CONFIG_INFINIBAND_USER_MEM */
 
 #endif /* IB_UMEM_H */