1 files changed, 161 insertions, 0 deletions
diff --git a/src/vlib/physmem_funcs.h b/src/vlib/physmem_funcs.h
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+++ b/src/vlib/physmem_funcs.h
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+/*
+ * Copyright (c) 2015 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/*
+ * physmem.h: virtual <-> physical memory mapping for VLIB buffers
+ *
+ * Copyright (c) 2008 Eliot Dresselhaus
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef included_vlib_physmem_funcs_h
+#define included_vlib_physmem_funcs_h
+
+always_inline vlib_physmem_region_t *
+vlib_physmem_get_region (vlib_main_t * vm, u8 index)
+{
+  vlib_physmem_main_t *vpm = &vm->physmem_main;
+  return pool_elt_at_index (vpm->regions, index);
+}
+
+always_inline u64
+vlib_physmem_offset_to_physical (vlib_main_t * vm,
+				 vlib_physmem_region_index_t idx, uword o)
+{
+  vlib_physmem_region_t *pr = vlib_physmem_get_region (vm, idx);
+  uword page_index = o >> pr->log2_page_size;
+  ASSERT (o < pr->size);
+  ASSERT (pr->page_table[page_index] != 0);
+  return (vec_elt (pr->page_table, page_index) + (o & pr->page_mask));
+}
+
+always_inline int
+vlib_physmem_is_virtual (vlib_main_t * vm, vlib_physmem_region_index_t idx,
+			 uword p)
+{
+  vlib_physmem_region_t *pr = vlib_physmem_get_region (vm, idx);
+  return p >= pointer_to_uword (pr->mem)
+    && p < (pointer_to_uword (pr->mem) + pr->size);
+}
+
+always_inline uword
+vlib_physmem_offset_of (vlib_main_t * vm, vlib_physmem_region_index_t idx,
+			void *p)
+{
+  vlib_physmem_region_t *pr = vlib_physmem_get_region (vm, idx);
+  uword a = pointer_to_uword (p);
+  uword o;
+
+  ASSERT (vlib_physmem_is_virtual (vm, idx, a));
+  o = a - pointer_to_uword (pr->mem);
+
+  /* Offset must fit in 32 bits. */
+  ASSERT ((uword) o == a - pointer_to_uword (pr->mem));
+
+  return o;
+}
+
+always_inline void *
+vlib_physmem_at_offset (vlib_main_t * vm, vlib_physmem_region_index_t idx,
+			uword offset)
+{
+  vlib_physmem_region_t *pr = vlib_physmem_get_region (vm, idx);
+  ASSERT (offset < pr->size);
+  return uword_to_pointer (pointer_to_uword (pr->mem) + offset, void *);
+}
+
+always_inline void *
+vlib_physmem_alloc_aligned (vlib_main_t * vm, vlib_physmem_region_index_t idx,
+			    clib_error_t ** error,
+			    uword n_bytes, uword alignment)
+{
+  void *r = vm->os_physmem_alloc_aligned (vm, idx, n_bytes, alignment);
+  if (!r)
+    *error =
+      clib_error_return (0, "failed to allocate %wd bytes of I/O memory",
+			 n_bytes);
+  else
+    *error = 0;
+  return r;
+}
+
+/* By default allocate I/O memory with cache line alignment. */
+always_inline void *
+vlib_physmem_alloc (vlib_main_t * vm, vlib_physmem_region_index_t idx,
+		    clib_error_t ** error, uword n_bytes)
+{
+  return vlib_physmem_alloc_aligned (vm, idx, error, n_bytes,
+				     CLIB_CACHE_LINE_BYTES);
+}
+
+always_inline void
+vlib_physmem_free (vlib_main_t * vm, vlib_physmem_region_index_t idx,
+		   void *mem)
+{
+  return vm->os_physmem_free (vm, idx, mem);
+}
+
+always_inline u64
+vlib_physmem_virtual_to_physical (vlib_main_t * vm,
+				  vlib_physmem_region_index_t idx, void *mem)
+{
+  vlib_physmem_main_t *vpm = &vm->physmem_main;
+  vlib_physmem_region_t *pr = pool_elt_at_index (vpm->regions, idx);
+  uword o = mem - pr->mem;
+  return vlib_physmem_offset_to_physical (vm, idx, o);
+}
+
+
+always_inline clib_error_t *
+vlib_physmem_region_alloc (vlib_main_t * vm, char *name, u32 size,
+			   u8 numa_node, u32 flags,
+			   vlib_physmem_region_index_t * idx)
+{
+  return vm->os_physmem_region_alloc (vm, name, size, numa_node, flags, idx);
+}
+
+always_inline void
+vlib_physmem_region_free (struct vlib_main_t *vm,
+			  vlib_physmem_region_index_t idx)
+{
+  vm->os_physmem_region_free (vm, idx);
+}
+
+#endif /* included_vlib_physmem_funcs_h */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */