1 files changed, 134 insertions, 0 deletions

diff --git a/include/os/posix/kmem.c b/include/os/posix/kmem.c
new file mode 100644
index 0000000..5fe0aeb
--- /dev/null
+++ b/include/os/posix/kmem.c
@@ -0,0 +1,134 @@
+/*
+ * Copyright (c) 2018, 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.
+ */
+
+#include <stdlib.h>
+
+#include <nvgpu/bug.h>
+#include <nvgpu/kmem.h>
+#include <nvgpu/types.h>
+
+#include <nvgpu/posix/kmem.h>
+
+struct nvgpu_kmem_cache {
+        size_t alloc_size;
+};
+
+/*
+ * kmem cache emulation: basically just do a regular malloc(). This is slower
+ * but should not affect a user of kmem cache in the slightest bit.
+ */
+struct nvgpu_kmem_cache *nvgpu_kmem_cache_create(struct gk20a *g, size_t size)
+{
+        struct nvgpu_kmem_cache *cache =
+                malloc(sizeof(struct nvgpu_kmem_cache));
+
+        if (cache != NULL)
+                return NULL;
+
+        cache->alloc_size = size;
+
+        return cache;
+}
+
+void nvgpu_kmem_cache_destroy(struct nvgpu_kmem_cache *cache)
+{
+        free(cache);
+}
+
+void *nvgpu_kmem_cache_alloc(struct nvgpu_kmem_cache *cache)
+{
+        return malloc(cache->alloc_size);
+}
+
+void nvgpu_kmem_cache_free(struct nvgpu_kmem_cache *cache, void *ptr)
+{
+        free(ptr);
+}
+
+void *__nvgpu_kmalloc(struct gk20a *g, size_t size, void *ip)
+{
+        return malloc(size);
+}
+
+void *__nvgpu_kzalloc(struct gk20a *g, size_t size, void *ip)
+{
+        return calloc(1, size);
+}
+
+void *__nvgpu_kcalloc(struct gk20a *g, size_t n, size_t size, void *ip)
+{
+        /*
+         * calloc() implicitly zeros mem. So calloc a single member size bytes
+         * long.
+         */
+        return calloc(n, size);
+}
+
+void __nvgpu_kfree(struct gk20a *g, void *addr)
+{
+        free(addr);
+}
+
+/*
+ * The concept of vmalloc() does not exist in userspace.
+ */
+void *__nvgpu_vmalloc(struct gk20a *g, unsigned long size, void *ip)
+{
+        return __nvgpu_kmalloc(g, size, ip);
+}
+
+void *__nvgpu_vzalloc(struct gk20a *g, unsigned long size, void *ip)
+{
+        return __nvgpu_kzalloc(g, size, ip);
+}
+
+void __nvgpu_vfree(struct gk20a *g, void *addr)
+{
+        __nvgpu_kfree(g, addr);
+}
+
+void *__nvgpu_big_alloc(struct gk20a *g, size_t size, bool clear)
+{
+        /*
+         * Since in userspace vmalloc() == kmalloc() == malloc() we can just
+         * reuse k[zm]alloc() for this.
+         */
+        return clear ?
+                __nvgpu_kzalloc(g, size, _NVGPU_GET_IP_) :
+                __nvgpu_kmalloc(g, size, _NVGPU_GET_IP_);
+}
+
+void nvgpu_big_free(struct gk20a *g, void *p)
+{
+        __nvgpu_kfree(g, p);
+}
+
+int nvgpu_kmem_init(struct gk20a *g)
+{
+        /* Nothing to init at the moment. */
+        return 0;
+}
+
+void nvgpu_kmem_fini(struct gk20a *g, int flags)
+{
+
+}