1 files changed, 87 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/common/mm/bitmap_allocator_priv.h b/drivers/gpu/nvgpu/common/mm/bitmap_allocator_priv.h
new file mode 100644
index 00000000..1750447d
--- /dev/null
+++ b/drivers/gpu/nvgpu/common/mm/bitmap_allocator_priv.h
@@ -0,0 +1,87 @@
+/*
+ * Copyright (c) 2016-2017, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * 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 BITMAP_ALLOCATOR_PRIV_H
+#define BITMAP_ALLOCATOR_PRIV_H
+
+
+#include <nvgpu/rbtree.h>
+#include <nvgpu/kmem.h>
+
+struct nvgpu_allocator;
+
+struct nvgpu_bitmap_allocator {
+        struct nvgpu_allocator *owner;
+
+        u64 base;                       /* Base address of the space. */
+        u64 length;                     /* Length of the space. */
+        u64 blk_size;                   /* Size that corresponds to 1 bit. */
+        u64 blk_shift;                  /* Bit shift to divide by blk_size. */
+        u64 num_bits;                   /* Number of allocatable bits. */
+        u64 bit_offs;                   /* Offset of bitmap. */
+
+        /*
+         * Optimization for making repeated allocations faster. Keep track of
+         * the next bit after the most recent allocation. This is where the next
+         * search will start from. This should make allocation faster in cases
+         * where lots of allocations get made one after another. It shouldn't
+         * have a negative impact on the case where the allocator is fragmented.
+         */
+        u64 next_blk;
+
+        unsigned long *bitmap;          /* The actual bitmap! */
+        struct nvgpu_rbtree_node *allocs;  /* Tree of outstanding allocations */
+
+        struct nvgpu_kmem_cache *meta_data_cache;
+
+        u64 flags;
+
+        bool inited;
+
+        /* Statistics */
+        u64 nr_allocs;
+        u64 nr_fixed_allocs;
+        u64 bytes_alloced;
+        u64 bytes_freed;
+};
+
+struct nvgpu_bitmap_alloc {
+        u64 base;
+        u64 length;
+        struct nvgpu_rbtree_node alloc_entry;   /* RB tree of allocations. */
+};
+
+static inline struct nvgpu_bitmap_alloc *
+nvgpu_bitmap_alloc_from_rbtree_node(struct nvgpu_rbtree_node *node)
+{
+        return (struct nvgpu_bitmap_alloc *)
+        ((uintptr_t)node - offsetof(struct nvgpu_bitmap_alloc, alloc_entry));
+};
+
+static inline struct nvgpu_bitmap_allocator *bitmap_allocator(
+        struct nvgpu_allocator *a)
+{
+        return (struct nvgpu_bitmap_allocator *)(a)->priv;
+}
+
+
+#endif