Adding upstream version 16.2.11+ds.upstream/16.2.11+dsupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 176 insertions, 0 deletions

diff --git a/src/spdk/lib/env_ocf/ocf_env.c b/src/spdk/lib/env_ocf/ocf_env.c
new file mode 100644
index 000000000..ab5445203
--- /dev/null
+++ b/src/spdk/lib/env_ocf/ocf_env.c
@@ -0,0 +1,176 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright (c) Intel Corporation.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#include "ocf/ocf_def.h"
+#include "ocf_env.h"
+
+#include "spdk/crc32.h"
+#include "spdk/env.h"
+#include "spdk_internal/log.h"
+
+/* Number of buffers for mempool
+ * Need to be power of two - 1 for better memory utilization
+ * It depends on memory usage of OCF which
+ * in itself depends on the workload
+ * It is a big number because OCF uses allocators
+ * for every request it sends and recieves
+ */
+#define ENV_ALLOCATOR_NBUFS 32767
+
+/* Use unique index for env allocators */
+static env_atomic g_env_allocator_index = 0;
+
+void *
+env_allocator_new(env_allocator *allocator)
+{
+	void *mem = spdk_mempool_get(allocator->mempool);
+
+	if (spdk_likely(mem)) {
+		memset(mem, 0, allocator->element_size);
+	}
+
+	return mem;
+}
+
+env_allocator *
+env_allocator_create(uint32_t size, const char *name)
+{
+	env_allocator *allocator;
+	char qualified_name[128] = {0};
+
+	snprintf(qualified_name, 128, "ocf_env_%d", env_atomic_inc_return(&g_env_allocator_index));
+
+	allocator = calloc(1, sizeof(*allocator));
+	if (!allocator) {
+		return NULL;
+	}
+
+	allocator->mempool = spdk_mempool_create(qualified_name,
+			     ENV_ALLOCATOR_NBUFS, size,
+			     SPDK_MEMPOOL_DEFAULT_CACHE_SIZE,
+			     SPDK_ENV_SOCKET_ID_ANY);
+
+	if (!allocator->mempool) {
+		free(allocator);
+		return NULL;
+	}
+
+	allocator->element_size = size;
+
+	return allocator;
+}
+
+void
+env_allocator_del(env_allocator *allocator, void *item)
+{
+	spdk_mempool_put(allocator->mempool, item);
+}
+
+void
+env_allocator_destroy(env_allocator *allocator)
+{
+	if (allocator) {
+		if (ENV_ALLOCATOR_NBUFS - spdk_mempool_count(allocator->mempool)) {
+			SPDK_ERRLOG("Not all objects deallocated\n");
+			assert(false);
+		}
+
+		spdk_mempool_free(allocator->mempool);
+		free(allocator);
+	}
+}
+/* *** CRC *** */
+
+uint32_t
+env_crc32(uint32_t crc, uint8_t const *message, size_t len)
+{
+	return spdk_crc32_ieee_update(message, len, crc);
+}
+
+/* EXECUTION CONTEXTS */
+pthread_mutex_t *exec_context_mutex;
+
+static void __attribute__((constructor)) init_execution_context(void)
+{
+	unsigned count = env_get_execution_context_count();
+	unsigned i;
+
+	ENV_BUG_ON(count == 0);
+	exec_context_mutex = malloc(count * sizeof(exec_context_mutex[0]));
+	ENV_BUG_ON(exec_context_mutex == NULL);
+	for (i = 0; i < count; i++) {
+		ENV_BUG_ON(pthread_mutex_init(&exec_context_mutex[i], NULL));
+	}
+}
+
+static void __attribute__((destructor)) deinit_execution_context(void)
+{
+	unsigned count = env_get_execution_context_count();
+	unsigned i;
+
+	ENV_BUG_ON(count == 0);
+	ENV_BUG_ON(exec_context_mutex == NULL);
+
+	for (i = 0; i < count; i++) {
+		ENV_BUG_ON(pthread_mutex_destroy(&exec_context_mutex[i]));
+	}
+	free(exec_context_mutex);
+}
+
+/* get_execuction_context must assure that after the call finishes, the caller
+ * will not get preempted from current execution context. For userspace env
+ * we simulate this behavior by acquiring per execution context mutex. As a
+ * result the caller might actually get preempted, but no other thread will
+ * execute in this context by the time the caller puts current execution ctx. */
+unsigned env_get_execution_context(void)
+{
+	unsigned cpu;
+
+	cpu = sched_getcpu();
+	cpu = (cpu == -1) ?  0 : cpu;
+
+	ENV_BUG_ON(pthread_mutex_lock(&exec_context_mutex[cpu]));
+
+	return cpu;
+}
+
+void env_put_execution_context(unsigned ctx)
+{
+	pthread_mutex_unlock(&exec_context_mutex[ctx]);
+}
+
+unsigned env_get_execution_context_count(void)
+{
+	int num = sysconf(_SC_NPROCESSORS_ONLN);
+
+	return (num == -1) ? 0 : num;
+}