Open source GPL/LGPL release

drivers/gpu/nvgpu/os/posix/kmem.c

@@ -0,0 +1,241 @@
+/*
+ * Copyright (c) 2018-2020, 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/log.h>
+#include <nvgpu/kmem.h>
+#include <nvgpu/types.h>
+#include <nvgpu/atomic.h>
+#include <nvgpu/posix/kmem.h>
+#include <nvgpu/posix/sizes.h>
+#include <nvgpu/posix/bug.h>
+#ifdef NVGPU_UNITTEST_FAULT_INJECTION_ENABLEMENT
+#include <nvgpu/posix/posix-fault-injection.h>
+#endif
+
+#ifdef __NVGPU_UNIT_TEST__
+#define CACHE_NAME_LEN	128
+#endif
+
+struct nvgpu_kmem_cache {
+	struct gk20a *g;
+	size_t size;
+#ifdef __NVGPU_UNIT_TEST__
+	char name[CACHE_NAME_LEN];
+#endif
+};
+
+#ifdef __NVGPU_UNIT_TEST__
+static nvgpu_atomic_t kmem_cache_id;
+#endif
+
+#ifdef NVGPU_UNITTEST_FAULT_INJECTION_ENABLEMENT
+struct nvgpu_posix_fault_inj *nvgpu_kmem_get_fault_injection(void)
+{
+	struct nvgpu_posix_fault_inj_container *c =
+			nvgpu_posix_fault_injection_get_container();
+
+	return &c->kmem_fi;
+}
+#endif
+
+/*
+ * 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;
+#ifdef NVGPU_UNITTEST_FAULT_INJECTION_ENABLEMENT
+	if (nvgpu_posix_fault_injection_handle_call(
+					nvgpu_kmem_get_fault_injection())) {
+		return NULL;
+	}
+#endif
+	cache = malloc(sizeof(struct nvgpu_kmem_cache));
+
+	if (cache == NULL) {
+		return NULL;
+	}
+
+	cache->g = g;
+	cache->size = size;
+
+#ifdef __NVGPU_UNIT_TEST__
+	(void)snprintf(cache->name, sizeof(cache->name),
+			"nvgpu-cache-0x%p-%lu-%d", g, size,
+			nvgpu_atomic_inc_return(&kmem_cache_id));
+#endif
+
+	return cache;
+}
+
+void nvgpu_kmem_cache_destroy(struct nvgpu_kmem_cache *cache)
+{
+	free(cache);
+}
+
+void *nvgpu_kmem_cache_alloc(struct nvgpu_kmem_cache *cache)
+{
+	void *ptr;
+
+#ifdef NVGPU_UNITTEST_FAULT_INJECTION_ENABLEMENT
+	if (nvgpu_posix_fault_injection_handle_call(
+					nvgpu_kmem_get_fault_injection())) {
+		return NULL;
+	}
+#endif
+	ptr = malloc(cache->size);
+
+	if (ptr == NULL) {
+		nvgpu_warn(NULL, "malloc returns NULL");
+		return NULL;
+	}
+
+	return ptr;
+}
+
+void nvgpu_kmem_cache_free(struct nvgpu_kmem_cache *cache, void *ptr)
+{
+	free(ptr);
+}
+
+void *nvgpu_kmalloc_impl(struct gk20a *g, size_t size, void *ip)
+{
+	void *ptr;
+
+#ifdef NVGPU_UNITTEST_FAULT_INJECTION_ENABLEMENT
+	if (nvgpu_posix_fault_injection_handle_call(
+					nvgpu_kmem_get_fault_injection())) {
+		return NULL;
+	}
+#endif
+	/*
+	 * Since, the callers don't really need the memory region to be
+	 * contiguous, use malloc here. If the need arises for this
+	 * interface to return contiguous memory, we can explore using
+	 * nvmap_page_alloc in qnx (i.e. using shm_open/shm_ctl_special/mmap
+	 * calls).
+	 */
+	ptr = malloc(size);
+
+	if (ptr == NULL) {
+		nvgpu_warn(NULL, "malloc returns NULL");
+		return NULL;
+	}
+
+	return ptr;
+}
+
+void *nvgpu_kzalloc_impl(struct gk20a *g, size_t size, void *ip)
+{
+	void *ptr;
+	const size_t num = 1;
+
+#ifdef NVGPU_UNITTEST_FAULT_INJECTION_ENABLEMENT
+	if (nvgpu_posix_fault_injection_handle_call(
+					nvgpu_kmem_get_fault_injection())) {
+		return NULL;
+	}
+#endif
+	ptr = calloc(num, size);
+
+	if (ptr == NULL) {
+		nvgpu_warn(NULL, "calloc returns NULL");
+		return NULL;
+	}
+
+	return ptr;
+}
+
+void *nvgpu_kcalloc_impl(struct gk20a *g, size_t n, size_t size, void *ip)
+{
+	void *ptr;
+	const size_t num = 1;
+
+#ifdef NVGPU_UNITTEST_FAULT_INJECTION_ENABLEMENT
+	if (nvgpu_posix_fault_injection_handle_call(
+					nvgpu_kmem_get_fault_injection())) {
+		return NULL;
+	}
+#endif
+	ptr = calloc(num, (nvgpu_safe_mult_u64(n, size)));
+
+	if (ptr == NULL) {
+		nvgpu_warn(NULL, "calloc returns NULL");
+		return NULL;
+	}
+
+	return ptr;
+}
+
+void *nvgpu_vmalloc_impl(struct gk20a *g, unsigned long size, void *ip)
+{
+	return nvgpu_kmalloc_impl(g, size, ip);
+}
+
+void *nvgpu_vzalloc_impl(struct gk20a *g, unsigned long size, void *ip)
+{
+	return nvgpu_kzalloc_impl(g, size, ip);
+}
+
+void nvgpu_kfree_impl(struct gk20a *g, void *addr)
+{
+	free(addr);
+}
+
+void nvgpu_vfree_impl(struct gk20a *g, void *addr)
+{
+	nvgpu_kfree_impl(g, addr);
+}
+
+void *nvgpu_big_alloc_impl(struct gk20a *g, size_t size, bool clear)
+{
+	if (clear) {
+		return nvgpu_kzalloc(g, size);
+	} else {
+		return nvgpu_kmalloc(g, size);
+	}
+}
+
+void nvgpu_big_free(struct gk20a *g, void *p)
+{
+	nvgpu_kfree_impl(g, p);
+}
+
+int nvgpu_kmem_init(struct gk20a *g)
+{
+#ifdef NVGPU_UNITTEST_FAULT_INJECTION_ENABLEMENT
+	if (nvgpu_posix_fault_injection_handle_call(
+					nvgpu_kmem_get_fault_injection())) {
+		return -ENOMEM;
+	}
+#endif
+	/* Nothing to init at the moment. */
+	return 0;
+}
+
+void nvgpu_kmem_fini(struct gk20a *g, int flags)
+{
+}