Adding upstream version 14.2.21.upstream/14.2.21upstream

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

7 files changed, 1610 insertions, 0 deletions

diff --git a/src/spdk/dpdk/lib/librte_ring/Makefile b/src/spdk/dpdk/lib/librte_ring/Makefile
new file mode 100644
index 00000000..21a36770
--- /dev/null
+++ b/src/spdk/dpdk/lib/librte_ring/Makefile
@@ -0,0 +1,24 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(c) 2010-2014 Intel Corporation
+
+include $(RTE_SDK)/mk/rte.vars.mk
+
+# library name
+LIB = librte_ring.a
+
+CFLAGS += $(WERROR_FLAGS) -I$(SRCDIR) -O3
+LDLIBS += -lrte_eal
+
+EXPORT_MAP := rte_ring_version.map
+
+LIBABIVER := 2
+
+# all source are stored in SRCS-y
+SRCS-$(CONFIG_RTE_LIBRTE_RING) := rte_ring.c
+
+# install includes
+SYMLINK-$(CONFIG_RTE_LIBRTE_RING)-include := rte_ring.h \
+					rte_ring_generic.h \
+					rte_ring_c11_mem.h
+
+include $(RTE_SDK)/mk/rte.lib.mk
diff --git a/src/spdk/dpdk/lib/librte_ring/meson.build b/src/spdk/dpdk/lib/librte_ring/meson.build
new file mode 100644
index 00000000..ca8a435e
--- /dev/null
+++ b/src/spdk/dpdk/lib/librte_ring/meson.build
@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(c) 2017 Intel Corporation
+
+sources = files('rte_ring.c')
+headers = files('rte_ring.h',
+		'rte_ring_c11_mem.h',
+		'rte_ring_generic.h')
diff --git a/src/spdk/dpdk/lib/librte_ring/rte_ring.c b/src/spdk/dpdk/lib/librte_ring/rte_ring.c
new file mode 100644
index 00000000..d215acec
--- /dev/null
+++ b/src/spdk/dpdk/lib/librte_ring/rte_ring.c
@@ -0,0 +1,282 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ *
+ * Copyright (c) 2010-2015 Intel Corporation
+ * Copyright (c) 2007,2008 Kip Macy kmacy@freebsd.org
+ * All rights reserved.
+ * Derived from FreeBSD's bufring.h
+ * Used as BSD-3 Licensed with permission from Kip Macy.
+ */
+
+#include <stdio.h>
+#include <stdarg.h>
+#include <string.h>
+#include <stdint.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <sys/queue.h>
+
+#include <rte_common.h>
+#include <rte_log.h>
+#include <rte_memory.h>
+#include <rte_memzone.h>
+#include <rte_malloc.h>
+#include <rte_launch.h>
+#include <rte_eal.h>
+#include <rte_eal_memconfig.h>
+#include <rte_atomic.h>
+#include <rte_per_lcore.h>
+#include <rte_lcore.h>
+#include <rte_branch_prediction.h>
+#include <rte_errno.h>
+#include <rte_string_fns.h>
+#include <rte_spinlock.h>
+
+#include "rte_ring.h"
+
+TAILQ_HEAD(rte_ring_list, rte_tailq_entry);
+
+static struct rte_tailq_elem rte_ring_tailq = {
+	.name = RTE_TAILQ_RING_NAME,
+};
+EAL_REGISTER_TAILQ(rte_ring_tailq)
+
+/* true if x is a power of 2 */
+#define POWEROF2(x) ((((x)-1) & (x)) == 0)
+
+/* return the size of memory occupied by a ring */
+ssize_t
+rte_ring_get_memsize(unsigned count)
+{
+	ssize_t sz;
+
+	/* count must be a power of 2 */
+	if ((!POWEROF2(count)) || (count > RTE_RING_SZ_MASK )) {
+		RTE_LOG(ERR, RING,
+			"Requested size is invalid, must be power of 2, and "
+			"do not exceed the size limit %u\n", RTE_RING_SZ_MASK);
+		return -EINVAL;
+	}
+
+	sz = sizeof(struct rte_ring) + count * sizeof(void *);
+	sz = RTE_ALIGN(sz, RTE_CACHE_LINE_SIZE);
+	return sz;
+}
+
+int
+rte_ring_init(struct rte_ring *r, const char *name, unsigned count,
+	unsigned flags)
+{
+	int ret;
+
+	/* compilation-time checks */
+	RTE_BUILD_BUG_ON((sizeof(struct rte_ring) &
+			  RTE_CACHE_LINE_MASK) != 0);
+	RTE_BUILD_BUG_ON((offsetof(struct rte_ring, cons) &
+			  RTE_CACHE_LINE_MASK) != 0);
+	RTE_BUILD_BUG_ON((offsetof(struct rte_ring, prod) &
+			  RTE_CACHE_LINE_MASK) != 0);
+
+	/* init the ring structure */
+	memset(r, 0, sizeof(*r));
+	ret = snprintf(r->name, sizeof(r->name), "%s", name);
+	if (ret < 0 || ret >= (int)sizeof(r->name))
+		return -ENAMETOOLONG;
+	r->flags = flags;
+	r->prod.single = (flags & RING_F_SP_ENQ) ? __IS_SP : __IS_MP;
+	r->cons.single = (flags & RING_F_SC_DEQ) ? __IS_SC : __IS_MC;
+
+	if (flags & RING_F_EXACT_SZ) {
+		r->size = rte_align32pow2(count + 1);
+		r->mask = r->size - 1;
+		r->capacity = count;
+	} else {
+		if ((!POWEROF2(count)) || (count > RTE_RING_SZ_MASK)) {
+			RTE_LOG(ERR, RING,
+				"Requested size is invalid, must be power of 2, and not exceed the size limit %u\n",
+				RTE_RING_SZ_MASK);
+			return -EINVAL;
+		}
+		r->size = count;
+		r->mask = count - 1;
+		r->capacity = r->mask;
+	}
+	r->prod.head = r->cons.head = 0;
+	r->prod.tail = r->cons.tail = 0;
+
+	return 0;
+}
+
+/* create the ring */
+struct rte_ring *
+rte_ring_create(const char *name, unsigned count, int socket_id,
+		unsigned flags)
+{
+	char mz_name[RTE_MEMZONE_NAMESIZE];
+	struct rte_ring *r;
+	struct rte_tailq_entry *te;
+	const struct rte_memzone *mz;
+	ssize_t ring_size;
+	int mz_flags = 0;
+	struct rte_ring_list* ring_list = NULL;
+	const unsigned int requested_count = count;
+	int ret;
+
+	ring_list = RTE_TAILQ_CAST(rte_ring_tailq.head, rte_ring_list);
+
+	/* for an exact size ring, round up from count to a power of two */
+	if (flags & RING_F_EXACT_SZ)
+		count = rte_align32pow2(count + 1);
+
+	ring_size = rte_ring_get_memsize(count);
+	if (ring_size < 0) {
+		rte_errno = ring_size;
+		return NULL;
+	}
+
+	ret = snprintf(mz_name, sizeof(mz_name), "%s%s",
+		RTE_RING_MZ_PREFIX, name);
+	if (ret < 0 || ret >= (int)sizeof(mz_name)) {
+		rte_errno = ENAMETOOLONG;
+		return NULL;
+	}
+
+	te = rte_zmalloc("RING_TAILQ_ENTRY", sizeof(*te), 0);
+	if (te == NULL) {
+		RTE_LOG(ERR, RING, "Cannot reserve memory for tailq\n");
+		rte_errno = ENOMEM;
+		return NULL;
+	}
+
+	rte_rwlock_write_lock(RTE_EAL_TAILQ_RWLOCK);
+
+	/* reserve a memory zone for this ring. If we can't get rte_config or
+	 * we are secondary process, the memzone_reserve function will set
+	 * rte_errno for us appropriately - hence no check in this this function */
+	mz = rte_memzone_reserve_aligned(mz_name, ring_size, socket_id,
+					 mz_flags, __alignof__(*r));
+	if (mz != NULL) {
+		r = mz->addr;
+		/* no need to check return value here, we already checked the
+		 * arguments above */
+		rte_ring_init(r, name, requested_count, flags);
+
+		te->data = (void *) r;
+		r->memzone = mz;
+
+		TAILQ_INSERT_TAIL(ring_list, te, next);
+	} else {
+		r = NULL;
+		RTE_LOG(ERR, RING, "Cannot reserve memory\n");
+		rte_free(te);
+	}
+	rte_rwlock_write_unlock(RTE_EAL_TAILQ_RWLOCK);
+
+	return r;
+}
+
+/* free the ring */
+void
+rte_ring_free(struct rte_ring *r)
+{
+	struct rte_ring_list *ring_list = NULL;
+	struct rte_tailq_entry *te;
+
+	if (r == NULL)
+		return;
+
+	/*
+	 * Ring was not created with rte_ring_create,
+	 * therefore, there is no memzone to free.
+	 */
+	if (r->memzone == NULL) {
+		RTE_LOG(ERR, RING, "Cannot free ring (not created with rte_ring_create()");
+		return;
+	}
+
+	if (rte_memzone_free(r->memzone) != 0) {
+		RTE_LOG(ERR, RING, "Cannot free memory\n");
+		return;
+	}
+
+	ring_list = RTE_TAILQ_CAST(rte_ring_tailq.head, rte_ring_list);
+	rte_rwlock_write_lock(RTE_EAL_TAILQ_RWLOCK);
+
+	/* find out tailq entry */
+	TAILQ_FOREACH(te, ring_list, next) {
+		if (te->data == (void *) r)
+			break;
+	}
+
+	if (te == NULL) {
+		rte_rwlock_write_unlock(RTE_EAL_TAILQ_RWLOCK);
+		return;
+	}
+
+	TAILQ_REMOVE(ring_list, te, next);
+
+	rte_rwlock_write_unlock(RTE_EAL_TAILQ_RWLOCK);
+
+	rte_free(te);
+}
+
+/* dump the status of the ring on the console */
+void
+rte_ring_dump(FILE *f, const struct rte_ring *r)
+{
+	fprintf(f, "ring <%s>@%p\n", r->name, r);
+	fprintf(f, "  flags=%x\n", r->flags);
+	fprintf(f, "  size=%"PRIu32"\n", r->size);
+	fprintf(f, "  capacity=%"PRIu32"\n", r->capacity);
+	fprintf(f, "  ct=%"PRIu32"\n", r->cons.tail);
+	fprintf(f, "  ch=%"PRIu32"\n", r->cons.head);
+	fprintf(f, "  pt=%"PRIu32"\n", r->prod.tail);
+	fprintf(f, "  ph=%"PRIu32"\n", r->prod.head);
+	fprintf(f, "  used=%u\n", rte_ring_count(r));
+	fprintf(f, "  avail=%u\n", rte_ring_free_count(r));
+}
+
+/* dump the status of all rings on the console */
+void
+rte_ring_list_dump(FILE *f)
+{
+	const struct rte_tailq_entry *te;
+	struct rte_ring_list *ring_list;
+
+	ring_list = RTE_TAILQ_CAST(rte_ring_tailq.head, rte_ring_list);
+
+	rte_rwlock_read_lock(RTE_EAL_TAILQ_RWLOCK);
+
+	TAILQ_FOREACH(te, ring_list, next) {
+		rte_ring_dump(f, (struct rte_ring *) te->data);
+	}
+
+	rte_rwlock_read_unlock(RTE_EAL_TAILQ_RWLOCK);
+}
+
+/* search a ring from its name */
+struct rte_ring *
+rte_ring_lookup(const char *name)
+{
+	struct rte_tailq_entry *te;
+	struct rte_ring *r = NULL;
+	struct rte_ring_list *ring_list;
+
+	ring_list = RTE_TAILQ_CAST(rte_ring_tailq.head, rte_ring_list);
+
+	rte_rwlock_read_lock(RTE_EAL_TAILQ_RWLOCK);
+
+	TAILQ_FOREACH(te, ring_list, next) {
+		r = (struct rte_ring *) te->data;
+		if (strncmp(name, r->name, RTE_RING_NAMESIZE) == 0)
+			break;
+	}
+
+	rte_rwlock_read_unlock(RTE_EAL_TAILQ_RWLOCK);
+
+	if (te == NULL) {
+		rte_errno = ENOENT;
+		return NULL;
+	}
+
+	return r;
+}
diff --git a/src/spdk/dpdk/lib/librte_ring/rte_ring.h b/src/spdk/dpdk/lib/librte_ring/rte_ring.h
new file mode 100644
index 00000000..7a731d07
--- /dev/null
+++ b/src/spdk/dpdk/lib/librte_ring/rte_ring.h
@@ -0,0 +1,945 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ *
+ * Copyright (c) 2010-2017 Intel Corporation
+ * Copyright (c) 2007-2009 Kip Macy kmacy@freebsd.org
+ * All rights reserved.
+ * Derived from FreeBSD's bufring.h
+ * Used as BSD-3 Licensed with permission from Kip Macy.
+ */
+
+#ifndef _RTE_RING_H_
+#define _RTE_RING_H_
+
+/**
+ * @file
+ * RTE Ring
+ *
+ * The Ring Manager is a fixed-size queue, implemented as a table of
+ * pointers. Head and tail pointers are modified atomically, allowing
+ * concurrent access to it. It has the following features:
+ *
+ * - FIFO (First In First Out)
+ * - Maximum size is fixed; the pointers are stored in a table.
+ * - Lockless implementation.
+ * - Multi- or single-consumer dequeue.
+ * - Multi- or single-producer enqueue.
+ * - Bulk dequeue.
+ * - Bulk enqueue.
+ *
+ * Note: the ring implementation is not preemptible. Refer to Programmer's
+ * guide/Environment Abstraction Layer/Multiple pthread/Known Issues/rte_ring
+ * for more information.
+ *
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdio.h>
+#include <stdint.h>
+#include <sys/queue.h>
+#include <errno.h>
+#include <rte_common.h>
+#include <rte_config.h>
+#include <rte_memory.h>
+#include <rte_lcore.h>
+#include <rte_atomic.h>
+#include <rte_branch_prediction.h>
+#include <rte_memzone.h>
+#include <rte_pause.h>
+
+#define RTE_TAILQ_RING_NAME "RTE_RING"
+
+enum rte_ring_queue_behavior {
+	RTE_RING_QUEUE_FIXED = 0, /* Enq/Deq a fixed number of items from a ring */
+	RTE_RING_QUEUE_VARIABLE   /* Enq/Deq as many items as possible from ring */
+};
+
+#define RTE_RING_MZ_PREFIX "RG_"
+/**< The maximum length of a ring name. */
+#define RTE_RING_NAMESIZE (RTE_MEMZONE_NAMESIZE - \
+			   sizeof(RTE_RING_MZ_PREFIX) + 1)
+
+struct rte_memzone; /* forward declaration, so as not to require memzone.h */
+
+/* structure to hold a pair of head/tail values and other metadata */
+struct rte_ring_headtail {
+	volatile uint32_t head;  /**< Prod/consumer head. */
+	volatile uint32_t tail;  /**< Prod/consumer tail. */
+	uint32_t single;         /**< True if single prod/cons */
+};
+
+/**
+ * An RTE ring structure.
+ *
+ * The producer and the consumer have a head and a tail index. The particularity
+ * of these index is that they are not between 0 and size(ring). These indexes
+ * are between 0 and 2^32, and we mask their value when we access the ring[]
+ * field. Thanks to this assumption, we can do subtractions between 2 index
+ * values in a modulo-32bit base: that's why the overflow of the indexes is not
+ * a problem.
+ */
+struct rte_ring {
+	/*
+	 * Note: this field kept the RTE_MEMZONE_NAMESIZE size due to ABI
+	 * compatibility requirements, it could be changed to RTE_RING_NAMESIZE
+	 * next time the ABI changes
+	 */
+	char name[RTE_MEMZONE_NAMESIZE] __rte_cache_aligned; /**< Name of the ring. */
+	int flags;               /**< Flags supplied at creation. */
+	const struct rte_memzone *memzone;
+			/**< Memzone, if any, containing the rte_ring */
+	uint32_t size;           /**< Size of ring. */
+	uint32_t mask;           /**< Mask (size-1) of ring. */
+	uint32_t capacity;       /**< Usable size of ring */
+
+	char pad0 __rte_cache_aligned; /**< empty cache line */
+
+	/** Ring producer status. */
+	struct rte_ring_headtail prod __rte_cache_aligned;
+	char pad1 __rte_cache_aligned; /**< empty cache line */
+
+	/** Ring consumer status. */
+	struct rte_ring_headtail cons __rte_cache_aligned;
+	char pad2 __rte_cache_aligned; /**< empty cache line */
+};
+
+#define RING_F_SP_ENQ 0x0001 /**< The default enqueue is "single-producer". */
+#define RING_F_SC_DEQ 0x0002 /**< The default dequeue is "single-consumer". */
+/**
+ * Ring is to hold exactly requested number of entries.
+ * Without this flag set, the ring size requested must be a power of 2, and the
+ * usable space will be that size - 1. With the flag, the requested size will
+ * be rounded up to the next power of two, but the usable space will be exactly
+ * that requested. Worst case, if a power-of-2 size is requested, half the
+ * ring space will be wasted.
+ */
+#define RING_F_EXACT_SZ 0x0004
+#define RTE_RING_SZ_MASK  (0x7fffffffU) /**< Ring size mask */
+
+/* @internal defines for passing to the enqueue dequeue worker functions */
+#define __IS_SP 1
+#define __IS_MP 0
+#define __IS_SC 1
+#define __IS_MC 0
+
+/**
+ * Calculate the memory size needed for a ring
+ *
+ * This function returns the number of bytes needed for a ring, given
+ * the number of elements in it. This value is the sum of the size of
+ * the structure rte_ring and the size of the memory needed by the
+ * objects pointers. The value is aligned to a cache line size.
+ *
+ * @param count
+ *   The number of elements in the ring (must be a power of 2).
+ * @return
+ *   - The memory size needed for the ring on success.
+ *   - -EINVAL if count is not a power of 2.
+ */
+ssize_t rte_ring_get_memsize(unsigned count);
+
+/**
+ * Initialize a ring structure.
+ *
+ * Initialize a ring structure in memory pointed by "r". The size of the
+ * memory area must be large enough to store the ring structure and the
+ * object table. It is advised to use rte_ring_get_memsize() to get the
+ * appropriate size.
+ *
+ * The ring size is set to *count*, which must be a power of two. Water
+ * marking is disabled by default. The real usable ring size is
+ * *count-1* instead of *count* to differentiate a free ring from an
+ * empty ring.
+ *
+ * The ring is not added in RTE_TAILQ_RING global list. Indeed, the
+ * memory given by the caller may not be shareable among dpdk
+ * processes.
+ *
+ * @param r
+ *   The pointer to the ring structure followed by the objects table.
+ * @param name
+ *   The name of the ring.
+ * @param count
+ *   The number of elements in the ring (must be a power of 2).
+ * @param flags
+ *   An OR of the following:
+ *    - RING_F_SP_ENQ: If this flag is set, the default behavior when
+ *      using ``rte_ring_enqueue()`` or ``rte_ring_enqueue_bulk()``
+ *      is "single-producer". Otherwise, it is "multi-producers".
+ *    - RING_F_SC_DEQ: If this flag is set, the default behavior when
+ *      using ``rte_ring_dequeue()`` or ``rte_ring_dequeue_bulk()``
+ *      is "single-consumer". Otherwise, it is "multi-consumers".
+ * @return
+ *   0 on success, or a negative value on error.
+ */
+int rte_ring_init(struct rte_ring *r, const char *name, unsigned count,
+	unsigned flags);
+
+/**
+ * Create a new ring named *name* in memory.
+ *
+ * This function uses ``memzone_reserve()`` to allocate memory. Then it
+ * calls rte_ring_init() to initialize an empty ring.
+ *
+ * The new ring size is set to *count*, which must be a power of
+ * two. Water marking is disabled by default. The real usable ring size
+ * is *count-1* instead of *count* to differentiate a free ring from an
+ * empty ring.
+ *
+ * The ring is added in RTE_TAILQ_RING list.
+ *
+ * @param name
+ *   The name of the ring.
+ * @param count
+ *   The size of the ring (must be a power of 2).
+ * @param socket_id
+ *   The *socket_id* argument is the socket identifier in case of
+ *   NUMA. The value can be *SOCKET_ID_ANY* if there is no NUMA
+ *   constraint for the reserved zone.
+ * @param flags
+ *   An OR of the following:
+ *    - RING_F_SP_ENQ: If this flag is set, the default behavior when
+ *      using ``rte_ring_enqueue()`` or ``rte_ring_enqueue_bulk()``
+ *      is "single-producer". Otherwise, it is "multi-producers".
+ *    - RING_F_SC_DEQ: If this flag is set, the default behavior when
+ *      using ``rte_ring_dequeue()`` or ``rte_ring_dequeue_bulk()``
+ *      is "single-consumer". Otherwise, it is "multi-consumers".
+ * @return
+ *   On success, the pointer to the new allocated ring. NULL on error with
+ *    rte_errno set appropriately. Possible errno values include:
+ *    - E_RTE_NO_CONFIG - function could not get pointer to rte_config structure
+ *    - E_RTE_SECONDARY - function was called from a secondary process instance
+ *    - EINVAL - count provided is not a power of 2
+ *    - ENOSPC - the maximum number of memzones has already been allocated
+ *    - EEXIST - a memzone with the same name already exists
+ *    - ENOMEM - no appropriate memory area found in which to create memzone
+ */
+struct rte_ring *rte_ring_create(const char *name, unsigned count,
+				 int socket_id, unsigned flags);
+/**
+ * De-allocate all memory used by the ring.
+ *
+ * @param r
+ *   Ring to free
+ */
+void rte_ring_free(struct rte_ring *r);
+
+/**
+ * Dump the status of the ring to a file.
+ *
+ * @param f
+ *   A pointer to a file for output
+ * @param r
+ *   A pointer to the ring structure.
+ */
+void rte_ring_dump(FILE *f, const struct rte_ring *r);
+
+/* the actual enqueue of pointers on the ring.
+ * Placed here since identical code needed in both
+ * single and multi producer enqueue functions */
+#define ENQUEUE_PTRS(r, ring_start, prod_head, obj_table, n, obj_type) do { \
+	unsigned int i; \
+	const uint32_t size = (r)->size; \
+	uint32_t idx = prod_head & (r)->mask; \
+	obj_type *ring = (obj_type *)ring_start; \
+	if (likely(idx + n < size)) { \
+		for (i = 0; i < (n & ((~(unsigned)0x3))); i+=4, idx+=4) { \
+			ring[idx] = obj_table[i]; \
+			ring[idx+1] = obj_table[i+1]; \
+			ring[idx+2] = obj_table[i+2]; \
+			ring[idx+3] = obj_table[i+3]; \
+		} \
+		switch (n & 0x3) { \
+		case 3: \
+			ring[idx++] = obj_table[i++]; /* fallthrough */ \
+		case 2: \
+			ring[idx++] = obj_table[i++]; /* fallthrough */ \
+		case 1: \
+			ring[idx++] = obj_table[i++]; \
+		} \
+	} else { \
+		for (i = 0; idx < size; i++, idx++)\
+			ring[idx] = obj_table[i]; \
+		for (idx = 0; i < n; i++, idx++) \
+			ring[idx] = obj_table[i]; \
+	} \
+} while (0)
+
+/* the actual copy of pointers on the ring to obj_table.
+ * Placed here since identical code needed in both
+ * single and multi consumer dequeue functions */
+#define DEQUEUE_PTRS(r, ring_start, cons_head, obj_table, n, obj_type) do { \
+	unsigned int i; \
+	uint32_t idx = cons_head & (r)->mask; \
+	const uint32_t size = (r)->size; \
+	obj_type *ring = (obj_type *)ring_start; \
+	if (likely(idx + n < size)) { \
+		for (i = 0; i < (n & (~(unsigned)0x3)); i+=4, idx+=4) {\
+			obj_table[i] = ring[idx]; \
+			obj_table[i+1] = ring[idx+1]; \
+			obj_table[i+2] = ring[idx+2]; \
+			obj_table[i+3] = ring[idx+3]; \
+		} \
+		switch (n & 0x3) { \
+		case 3: \
+			obj_table[i++] = ring[idx++]; /* fallthrough */ \
+		case 2: \
+			obj_table[i++] = ring[idx++]; /* fallthrough */ \
+		case 1: \
+			obj_table[i++] = ring[idx++]; \
+		} \
+	} else { \
+		for (i = 0; idx < size; i++, idx++) \
+			obj_table[i] = ring[idx]; \
+		for (idx = 0; i < n; i++, idx++) \
+			obj_table[i] = ring[idx]; \
+	} \
+} while (0)
+
+/* Between load and load. there might be cpu reorder in weak model
+ * (powerpc/arm).
+ * There are 2 choices for the users
+ * 1.use rmb() memory barrier
+ * 2.use one-direcion load_acquire/store_release barrier,defined by
+ * CONFIG_RTE_RING_USE_C11_MEM_MODEL=y
+ * It depends on performance test results.
+ * By default, move common functions to rte_ring_generic.h
+ */
+#ifdef RTE_RING_USE_C11_MEM_MODEL
+#include "rte_ring_c11_mem.h"
+#else
+#include "rte_ring_generic.h"
+#endif
+
+/**
+ * @internal Enqueue several objects on the ring
+ *
+  * @param r
+ *   A pointer to the ring structure.
+ * @param obj_table
+ *   A pointer to a table of void * pointers (objects).
+ * @param n
+ *   The number of objects to add in the ring from the obj_table.
+ * @param behavior
+ *   RTE_RING_QUEUE_FIXED:    Enqueue a fixed number of items from a ring
+ *   RTE_RING_QUEUE_VARIABLE: Enqueue as many items as possible from ring
+ * @param is_sp
+ *   Indicates whether to use single producer or multi-producer head update
+ * @param free_space
+ *   returns the amount of space after the enqueue operation has finished
+ * @return
+ *   Actual number of objects enqueued.
+ *   If behavior == RTE_RING_QUEUE_FIXED, this will be 0 or n only.
+ */
+static __rte_always_inline unsigned int
+__rte_ring_do_enqueue(struct rte_ring *r, void * const *obj_table,
+		 unsigned int n, enum rte_ring_queue_behavior behavior,
+		 unsigned int is_sp, unsigned int *free_space)
+{
+	uint32_t prod_head, prod_next;
+	uint32_t free_entries;
+
+	n = __rte_ring_move_prod_head(r, is_sp, n, behavior,
+			&prod_head, &prod_next, &free_entries);
+	if (n == 0)
+		goto end;
+
+	ENQUEUE_PTRS(r, &r[1], prod_head, obj_table, n, void *);
+
+	update_tail(&r->prod, prod_head, prod_next, is_sp, 1);
+end:
+	if (free_space != NULL)
+		*free_space = free_entries - n;
+	return n;
+}
+
+/**
+ * @internal Dequeue several objects from the ring
+ *
+ * @param r
+ *   A pointer to the ring structure.
+ * @param obj_table
+ *   A pointer to a table of void * pointers (objects).
+ * @param n
+ *   The number of objects to pull from the ring.
+ * @param behavior
+ *   RTE_RING_QUEUE_FIXED:    Dequeue a fixed number of items from a ring
+ *   RTE_RING_QUEUE_VARIABLE: Dequeue as many items as possible from ring
+ * @param is_sc
+ *   Indicates whether to use single consumer or multi-consumer head update
+ * @param available
+ *   returns the number of remaining ring entries after the dequeue has finished
+ * @return
+ *   - Actual number of objects dequeued.
+ *     If behavior == RTE_RING_QUEUE_FIXED, this will be 0 or n only.
+ */
+static __rte_always_inline unsigned int
+__rte_ring_do_dequeue(struct rte_ring *r, void **obj_table,
+		 unsigned int n, enum rte_ring_queue_behavior behavior,
+		 unsigned int is_sc, unsigned int *available)
+{
+	uint32_t cons_head, cons_next;
+	uint32_t entries;
+
+	n = __rte_ring_move_cons_head(r, (int)is_sc, n, behavior,
+			&cons_head, &cons_next, &entries);
+	if (n == 0)
+		goto end;
+
+	DEQUEUE_PTRS(r, &r[1], cons_head, obj_table, n, void *);
+
+	update_tail(&r->cons, cons_head, cons_next, is_sc, 0);
+
+end:
+	if (available != NULL)
+		*available = entries - n;
+	return n;
+}
+
+/**
+ * Enqueue several objects on the ring (multi-producers safe).
+ *
+ * This function uses a "compare and set" instruction to move the
+ * producer index atomically.
+ *
+ * @param r
+ *   A pointer to the ring structure.
+ * @param obj_table
+ *   A pointer to a table of void * pointers (objects).
+ * @param n
+ *   The number of objects to add in the ring from the obj_table.
+ * @param free_space
+ *   if non-NULL, returns the amount of space in the ring after the
+ *   enqueue operation has finished.
+ * @return
+ *   The number of objects enqueued, either 0 or n
+ */
+static __rte_always_inline unsigned int
+rte_ring_mp_enqueue_bulk(struct rte_ring *r, void * const *obj_table,
+			 unsigned int n, unsigned int *free_space)
+{
+	return __rte_ring_do_enqueue(r, obj_table, n, RTE_RING_QUEUE_FIXED,
+			__IS_MP, free_space);
+}
+
+/**
+ * Enqueue several objects on a ring (NOT multi-producers safe).
+ *
+ * @param r
+ *   A pointer to the ring structure.
+ * @param obj_table
+ *   A pointer to a table of void * pointers (objects).
+ * @param n
+ *   The number of objects to add in the ring from the obj_table.
+ * @param free_space
+ *   if non-NULL, returns the amount of space in the ring after the
+ *   enqueue operation has finished.
+ * @return
+ *   The number of objects enqueued, either 0 or n
+ */
+static __rte_always_inline unsigned int
+rte_ring_sp_enqueue_bulk(struct rte_ring *r, void * const *obj_table,
+			 unsigned int n, unsigned int *free_space)
+{
+	return __rte_ring_do_enqueue(r, obj_table, n, RTE_RING_QUEUE_FIXED,
+			__IS_SP, free_space);
+}
+
+/**
+ * Enqueue several objects on a ring.
+ *
+ * This function calls the multi-producer or the single-producer
+ * version depending on the default behavior that was specified at
+ * ring creation time (see flags).
+ *
+ * @param r
+ *   A pointer to the ring structure.
+ * @param obj_table
+ *   A pointer to a table of void * pointers (objects).
+ * @param n
+ *   The number of objects to add in the ring from the obj_table.
+ * @param free_space
+ *   if non-NULL, returns the amount of space in the ring after the
+ *   enqueue operation has finished.
+ * @return
+ *   The number of objects enqueued, either 0 or n
+ */
+static __rte_always_inline unsigned int
+rte_ring_enqueue_bulk(struct rte_ring *r, void * const *obj_table,
+		      unsigned int n, unsigned int *free_space)
+{
+	return __rte_ring_do_enqueue(r, obj_table, n, RTE_RING_QUEUE_FIXED,
+			r->prod.single, free_space);
+}
+
+/**
+ * Enqueue one object on a ring (multi-producers safe).
+ *
+ * This function uses a "compare and set" instruction to move the
+ * producer index atomically.
+ *
+ * @param r
+ *   A pointer to the ring structure.
+ * @param obj
+ *   A pointer to the object to be added.
+ * @return
+ *   - 0: Success; objects enqueued.
+ *   - -ENOBUFS: Not enough room in the ring to enqueue; no object is enqueued.
+ */
+static __rte_always_inline int
+rte_ring_mp_enqueue(struct rte_ring *r, void *obj)
+{
+	return rte_ring_mp_enqueue_bulk(r, &obj, 1, NULL) ? 0 : -ENOBUFS;
+}
+
+/**
+ * Enqueue one object on a ring (NOT multi-producers safe).
+ *
+ * @param r
+ *   A pointer to the ring structure.
+ * @param obj
+ *   A pointer to the object to be added.
+ * @return
+ *   - 0: Success; objects enqueued.
+ *   - -ENOBUFS: Not enough room in the ring to enqueue; no object is enqueued.
+ */
+static __rte_always_inline int
+rte_ring_sp_enqueue(struct rte_ring *r, void *obj)
+{
+	return rte_ring_sp_enqueue_bulk(r, &obj, 1, NULL) ? 0 : -ENOBUFS;
+}
+
+/**
+ * Enqueue one object on a ring.
+ *
+ * This function calls the multi-producer or the single-producer
+ * version, depending on the default behaviour that was specified at
+ * ring creation time (see flags).
+ *
+ * @param r
+ *   A pointer to the ring structure.
+ * @param obj
+ *   A pointer to the object to be added.
+ * @return
+ *   - 0: Success; objects enqueued.
+ *   - -ENOBUFS: Not enough room in the ring to enqueue; no object is enqueued.
+ */
+static __rte_always_inline int
+rte_ring_enqueue(struct rte_ring *r, void *obj)
+{
+	return rte_ring_enqueue_bulk(r, &obj, 1, NULL) ? 0 : -ENOBUFS;
+}
+
+/**
+ * Dequeue several objects from a ring (multi-consumers safe).
+ *
+ * This function uses a "compare and set" instruction to move the
+ * consumer index atomically.
+ *
+ * @param r
+ *   A pointer to the ring structure.
+ * @param obj_table
+ *   A pointer to a table of void * pointers (objects) that will be filled.
+ * @param n
+ *   The number of objects to dequeue from the ring to the obj_table.
+ * @param available
+ *   If non-NULL, returns the number of remaining ring entries after the
+ *   dequeue has finished.
+ * @return
+ *   The number of objects dequeued, either 0 or n
+ */
+static __rte_always_inline unsigned int
+rte_ring_mc_dequeue_bulk(struct rte_ring *r, void **obj_table,
+		unsigned int n, unsigned int *available)
+{
+	return __rte_ring_do_dequeue(r, obj_table, n, RTE_RING_QUEUE_FIXED,
+			__IS_MC, available);
+}
+
+/**
+ * Dequeue several objects from a ring (NOT multi-consumers safe).
+ *
+ * @param r
+ *   A pointer to the ring structure.
+ * @param obj_table
+ *   A pointer to a table of void * pointers (objects) that will be filled.
+ * @param n
+ *   The number of objects to dequeue from the ring to the obj_table,
+ *   must be strictly positive.
+ * @param available
+ *   If non-NULL, returns the number of remaining ring entries after the
+ *   dequeue has finished.
+ * @return
+ *   The number of objects dequeued, either 0 or n
+ */
+static __rte_always_inline unsigned int
+rte_ring_sc_dequeue_bulk(struct rte_ring *r, void **obj_table,
+		unsigned int n, unsigned int *available)
+{
+	return __rte_ring_do_dequeue(r, obj_table, n, RTE_RING_QUEUE_FIXED,
+			__IS_SC, available);
+}
+
+/**
+ * Dequeue several objects from a ring.
+ *
+ * This function calls the multi-consumers or the single-consumer
+ * version, depending on the default behaviour that was specified at
+ * ring creation time (see flags).
+ *
+ * @param r
+ *   A pointer to the ring structure.
+ * @param obj_table
+ *   A pointer to a table of void * pointers (objects) that will be filled.
+ * @param n
+ *   The number of objects to dequeue from the ring to the obj_table.
+ * @param available
+ *   If non-NULL, returns the number of remaining ring entries after the
+ *   dequeue has finished.
+ * @return
+ *   The number of objects dequeued, either 0 or n
+ */
+static __rte_always_inline unsigned int
+rte_ring_dequeue_bulk(struct rte_ring *r, void **obj_table, unsigned int n,
+		unsigned int *available)
+{
+	return __rte_ring_do_dequeue(r, obj_table, n, RTE_RING_QUEUE_FIXED,
+				r->cons.single, available);
+}
+
+/**
+ * Dequeue one object from a ring (multi-consumers safe).
+ *
+ * This function uses a "compare and set" instruction to move the
+ * consumer index atomically.
+ *
+ * @param r
+ *   A pointer to the ring structure.
+ * @param obj_p
+ *   A pointer to a void * pointer (object) that will be filled.
+ * @return
+ *   - 0: Success; objects dequeued.
+ *   - -ENOENT: Not enough entries in the ring to dequeue; no object is
+ *     dequeued.
+ */
+static __rte_always_inline int
+rte_ring_mc_dequeue(struct rte_ring *r, void **obj_p)
+{
+	return rte_ring_mc_dequeue_bulk(r, obj_p, 1, NULL)  ? 0 : -ENOENT;
+}
+
+/**
+ * Dequeue one object from a ring (NOT multi-consumers safe).
+ *
+ * @param r
+ *   A pointer to the ring structure.
+ * @param obj_p
+ *   A pointer to a void * pointer (object) that will be filled.
+ * @return
+ *   - 0: Success; objects dequeued.
+ *   - -ENOENT: Not enough entries in the ring to dequeue, no object is
+ *     dequeued.
+ */
+static __rte_always_inline int
+rte_ring_sc_dequeue(struct rte_ring *r, void **obj_p)
+{
+	return rte_ring_sc_dequeue_bulk(r, obj_p, 1, NULL) ? 0 : -ENOENT;
+}
+
+/**
+ * Dequeue one object from a ring.
+ *
+ * This function calls the multi-consumers or the single-consumer
+ * version depending on the default behaviour that was specified at
+ * ring creation time (see flags).
+ *
+ * @param r
+ *   A pointer to the ring structure.
+ * @param obj_p
+ *   A pointer to a void * pointer (object) that will be filled.
+ * @return
+ *   - 0: Success, objects dequeued.
+ *   - -ENOENT: Not enough entries in the ring to dequeue, no object is
+ *     dequeued.
+ */
+static __rte_always_inline int
+rte_ring_dequeue(struct rte_ring *r, void **obj_p)
+{
+	return rte_ring_dequeue_bulk(r, obj_p, 1, NULL) ? 0 : -ENOENT;
+}
+
+/**
+ * Return the number of entries in a ring.
+ *
+ * @param r
+ *   A pointer to the ring structure.
+ * @return
+ *   The number of entries in the ring.
+ */
+static inline unsigned
+rte_ring_count(const struct rte_ring *r)
+{
+	uint32_t prod_tail = r->prod.tail;
+	uint32_t cons_tail = r->cons.tail;
+	uint32_t count = (prod_tail - cons_tail) & r->mask;
+	return (count > r->capacity) ? r->capacity : count;
+}
+
+/**
+ * Return the number of free entries in a ring.
+ *
+ * @param r
+ *   A pointer to the ring structure.
+ * @return
+ *   The number of free entries in the ring.
+ */
+static inline unsigned
+rte_ring_free_count(const struct rte_ring *r)
+{
+	return r->capacity - rte_ring_count(r);
+}
+
+/**
+ * Test if a ring is full.
+ *
+ * @param r
+ *   A pointer to the ring structure.
+ * @return
+ *   - 1: The ring is full.
+ *   - 0: The ring is not full.
+ */
+static inline int
+rte_ring_full(const struct rte_ring *r)
+{
+	return rte_ring_free_count(r) == 0;
+}
+
+/**
+ * Test if a ring is empty.
+ *
+ * @param r
+ *   A pointer to the ring structure.
+ * @return
+ *   - 1: The ring is empty.
+ *   - 0: The ring is not empty.
+ */
+static inline int
+rte_ring_empty(const struct rte_ring *r)
+{
+	return rte_ring_count(r) == 0;
+}
+
+/**
+ * Return the size of the ring.
+ *
+ * @param r
+ *   A pointer to the ring structure.
+ * @return
+ *   The size of the data store used by the ring.
+ *   NOTE: this is not the same as the usable space in the ring. To query that
+ *   use ``rte_ring_get_capacity()``.
+ */
+static inline unsigned int
+rte_ring_get_size(const struct rte_ring *r)
+{
+	return r->size;
+}
+
+/**
+ * Return the number of elements which can be stored in the ring.
+ *
+ * @param r
+ *   A pointer to the ring structure.
+ * @return
+ *   The usable size of the ring.
+ */
+static inline unsigned int
+rte_ring_get_capacity(const struct rte_ring *r)
+{
+	return r->capacity;
+}
+
+/**
+ * Dump the status of all rings on the console
+ *
+ * @param f
+ *   A pointer to a file for output
+ */
+void rte_ring_list_dump(FILE *f);
+
+/**
+ * Search a ring from its name
+ *
+ * @param name
+ *   The name of the ring.
+ * @return
+ *   The pointer to the ring matching the name, or NULL if not found,
+ *   with rte_errno set appropriately. Possible rte_errno values include:
+ *    - ENOENT - required entry not available to return.
+ */
+struct rte_ring *rte_ring_lookup(const char *name);
+
+/**
+ * Enqueue several objects on the ring (multi-producers safe).
+ *
+ * This function uses a "compare and set" instruction to move the
+ * producer index atomically.
+ *
+ * @param r
+ *   A pointer to the ring structure.
+ * @param obj_table
+ *   A pointer to a table of void * pointers (objects).
+ * @param n
+ *   The number of objects to add in the ring from the obj_table.
+ * @param free_space
+ *   if non-NULL, returns the amount of space in the ring after the
+ *   enqueue operation has finished.
+ * @return
+ *   - n: Actual number of objects enqueued.
+ */
+static __rte_always_inline unsigned
+rte_ring_mp_enqueue_burst(struct rte_ring *r, void * const *obj_table,
+			 unsigned int n, unsigned int *free_space)
+{
+	return __rte_ring_do_enqueue(r, obj_table, n,
+			RTE_RING_QUEUE_VARIABLE, __IS_MP, free_space);
+}
+
+/**
+ * Enqueue several objects on a ring (NOT multi-producers safe).
+ *
+ * @param r
+ *   A pointer to the ring structure.
+ * @param obj_table
+ *   A pointer to a table of void * pointers (objects).
+ * @param n
+ *   The number of objects to add in the ring from the obj_table.
+ * @param free_space
+ *   if non-NULL, returns the amount of space in the ring after the
+ *   enqueue operation has finished.
+ * @return
+ *   - n: Actual number of objects enqueued.
+ */
+static __rte_always_inline unsigned
+rte_ring_sp_enqueue_burst(struct rte_ring *r, void * const *obj_table,
+			 unsigned int n, unsigned int *free_space)
+{
+	return __rte_ring_do_enqueue(r, obj_table, n,
+			RTE_RING_QUEUE_VARIABLE, __IS_SP, free_space);
+}
+
+/**
+ * Enqueue several objects on a ring.
+ *
+ * This function calls the multi-producer or the single-producer
+ * version depending on the default behavior that was specified at
+ * ring creation time (see flags).
+ *
+ * @param r
+ *   A pointer to the ring structure.
+ * @param obj_table
+ *   A pointer to a table of void * pointers (objects).
+ * @param n
+ *   The number of objects to add in the ring from the obj_table.
+ * @param free_space
+ *   if non-NULL, returns the amount of space in the ring after the
+ *   enqueue operation has finished.
+ * @return
+ *   - n: Actual number of objects enqueued.
+ */
+static __rte_always_inline unsigned
+rte_ring_enqueue_burst(struct rte_ring *r, void * const *obj_table,
+		      unsigned int n, unsigned int *free_space)
+{
+	return __rte_ring_do_enqueue(r, obj_table, n, RTE_RING_QUEUE_VARIABLE,
+			r->prod.single, free_space);
+}
+
+/**
+ * Dequeue several objects from a ring (multi-consumers safe). When the request
+ * objects are more than the available objects, only dequeue the actual number
+ * of objects
+ *
+ * This function uses a "compare and set" instruction to move the
+ * consumer index atomically.
+ *
+ * @param r
+ *   A pointer to the ring structure.
+ * @param obj_table
+ *   A pointer to a table of void * pointers (objects) that will be filled.
+ * @param n
+ *   The number of objects to dequeue from the ring to the obj_table.
+ * @param available
+ *   If non-NULL, returns the number of remaining ring entries after the
+ *   dequeue has finished.
+ * @return
+ *   - n: Actual number of objects dequeued, 0 if ring is empty
+ */
+static __rte_always_inline unsigned
+rte_ring_mc_dequeue_burst(struct rte_ring *r, void **obj_table,
+		unsigned int n, unsigned int *available)
+{
+	return __rte_ring_do_dequeue(r, obj_table, n,
+			RTE_RING_QUEUE_VARIABLE, __IS_MC, available);
+}
+
+/**
+ * Dequeue several objects from a ring (NOT multi-consumers safe).When the
+ * request objects are more than the available objects, only dequeue the
+ * actual number of objects
+ *
+ * @param r
+ *   A pointer to the ring structure.
+ * @param obj_table
+ *   A pointer to a table of void * pointers (objects) that will be filled.
+ * @param n
+ *   The number of objects to dequeue from the ring to the obj_table.
+ * @param available
+ *   If non-NULL, returns the number of remaining ring entries after the
+ *   dequeue has finished.
+ * @return
+ *   - n: Actual number of objects dequeued, 0 if ring is empty
+ */
+static __rte_always_inline unsigned
+rte_ring_sc_dequeue_burst(struct rte_ring *r, void **obj_table,
+		unsigned int n, unsigned int *available)
+{
+	return __rte_ring_do_dequeue(r, obj_table, n,
+			RTE_RING_QUEUE_VARIABLE, __IS_SC, available);
+}
+
+/**
+ * Dequeue multiple objects from a ring up to a maximum number.
+ *
+ * This function calls the multi-consumers or the single-consumer
+ * version, depending on the default behaviour that was specified at
+ * ring creation time (see flags).
+ *
+ * @param r
+ *   A pointer to the ring structure.
+ * @param obj_table
+ *   A pointer to a table of void * pointers (objects) that will be filled.
+ * @param n
+ *   The number of objects to dequeue from the ring to the obj_table.
+ * @param available
+ *   If non-NULL, returns the number of remaining ring entries after the
+ *   dequeue has finished.
+ * @return
+ *   - Number of objects dequeued
+ */
+static __rte_always_inline unsigned
+rte_ring_dequeue_burst(struct rte_ring *r, void **obj_table,
+		unsigned int n, unsigned int *available)
+{
+	return __rte_ring_do_dequeue(r, obj_table, n,
+				RTE_RING_QUEUE_VARIABLE,
+				r->cons.single, available);
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _RTE_RING_H_ */
diff --git a/src/spdk/dpdk/lib/librte_ring/rte_ring_c11_mem.h b/src/spdk/dpdk/lib/librte_ring/rte_ring_c11_mem.h
new file mode 100644
index 00000000..94df3c4a
--- /dev/null
+++ b/src/spdk/dpdk/lib/librte_ring/rte_ring_c11_mem.h
@@ -0,0 +1,163 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ *
+ * Copyright (c) 2017,2018 HXT-semitech Corporation.
+ * Copyright (c) 2007-2009 Kip Macy kmacy@freebsd.org
+ * All rights reserved.
+ * Derived from FreeBSD's bufring.h
+ * Used as BSD-3 Licensed with permission from Kip Macy.
+ */
+
+#ifndef _RTE_RING_C11_MEM_H_
+#define _RTE_RING_C11_MEM_H_
+
+static __rte_always_inline void
+update_tail(struct rte_ring_headtail *ht, uint32_t old_val, uint32_t new_val,
+		uint32_t single, uint32_t enqueue)
+{
+	RTE_SET_USED(enqueue);
+
+	/*
+	 * If there are other enqueues/dequeues in progress that preceded us,
+	 * we need to wait for them to complete
+	 */
+	if (!single)
+		while (unlikely(ht->tail != old_val))
+			rte_pause();
+
+	__atomic_store_n(&ht->tail, new_val, __ATOMIC_RELEASE);
+}
+
+/**
+ * @internal This function updates the producer head for enqueue
+ *
+ * @param r
+ *   A pointer to the ring structure
+ * @param is_sp
+ *   Indicates whether multi-producer path is needed or not
+ * @param n
+ *   The number of elements we will want to enqueue, i.e. how far should the
+ *   head be moved
+ * @param behavior
+ *   RTE_RING_QUEUE_FIXED:    Enqueue a fixed number of items from a ring
+ *   RTE_RING_QUEUE_VARIABLE: Enqueue as many items as possible from ring
+ * @param old_head
+ *   Returns head value as it was before the move, i.e. where enqueue starts
+ * @param new_head
+ *   Returns the current/new head value i.e. where enqueue finishes
+ * @param free_entries
+ *   Returns the amount of free space in the ring BEFORE head was moved
+ * @return
+ *   Actual number of objects enqueued.
+ *   If behavior == RTE_RING_QUEUE_FIXED, this will be 0 or n only.
+ */
+static __rte_always_inline unsigned int
+__rte_ring_move_prod_head(struct rte_ring *r, unsigned int is_sp,
+		unsigned int n, enum rte_ring_queue_behavior behavior,
+		uint32_t *old_head, uint32_t *new_head,
+		uint32_t *free_entries)
+{
+	const uint32_t capacity = r->capacity;
+	unsigned int max = n;
+	int success;
+
+	do {
+		/* Reset n to the initial burst count */
+		n = max;
+
+		*old_head = __atomic_load_n(&r->prod.head,
+					__ATOMIC_ACQUIRE);
+
+		/*
+		 *  The subtraction is done between two unsigned 32bits value
+		 * (the result is always modulo 32 bits even if we have
+		 * *old_head > cons_tail). So 'free_entries' is always between 0
+		 * and capacity (which is < size).
+		 */
+		*free_entries = (capacity + r->cons.tail - *old_head);
+
+		/* check that we have enough room in ring */
+		if (unlikely(n > *free_entries))
+			n = (behavior == RTE_RING_QUEUE_FIXED) ?
+					0 : *free_entries;
+
+		if (n == 0)
+			return 0;
+
+		*new_head = *old_head + n;
+		if (is_sp)
+			r->prod.head = *new_head, success = 1;
+		else
+			success = __atomic_compare_exchange_n(&r->prod.head,
+					old_head, *new_head,
+					0, __ATOMIC_ACQUIRE,
+					__ATOMIC_RELAXED);
+	} while (unlikely(success == 0));
+	return n;
+}
+
+/**
+ * @internal This function updates the consumer head for dequeue
+ *
+ * @param r
+ *   A pointer to the ring structure
+ * @param is_sc
+ *   Indicates whether multi-consumer path is needed or not
+ * @param n
+ *   The number of elements we will want to enqueue, i.e. how far should the
+ *   head be moved
+ * @param behavior
+ *   RTE_RING_QUEUE_FIXED:    Dequeue a fixed number of items from a ring
+ *   RTE_RING_QUEUE_VARIABLE: Dequeue as many items as possible from ring
+ * @param old_head
+ *   Returns head value as it was before the move, i.e. where dequeue starts
+ * @param new_head
+ *   Returns the current/new head value i.e. where dequeue finishes
+ * @param entries
+ *   Returns the number of entries in the ring BEFORE head was moved
+ * @return
+ *   - Actual number of objects dequeued.
+ *     If behavior == RTE_RING_QUEUE_FIXED, this will be 0 or n only.
+ */
+static __rte_always_inline unsigned int
+__rte_ring_move_cons_head(struct rte_ring *r, int is_sc,
+		unsigned int n, enum rte_ring_queue_behavior behavior,
+		uint32_t *old_head, uint32_t *new_head,
+		uint32_t *entries)
+{
+	unsigned int max = n;
+	int success;
+
+	/* move cons.head atomically */
+	do {
+		/* Restore n as it may change every loop */
+		n = max;
+		*old_head = __atomic_load_n(&r->cons.head,
+					__ATOMIC_ACQUIRE);
+
+		/* The subtraction is done between two unsigned 32bits value
+		 * (the result is always modulo 32 bits even if we have
+		 * cons_head > prod_tail). So 'entries' is always between 0
+		 * and size(ring)-1.
+		 */
+		*entries = (r->prod.tail - *old_head);
+
+		/* Set the actual entries for dequeue */
+		if (n > *entries)
+			n = (behavior == RTE_RING_QUEUE_FIXED) ? 0 : *entries;
+
+		if (unlikely(n == 0))
+			return 0;
+
+		*new_head = *old_head + n;
+		if (is_sc)
+			r->cons.head = *new_head, success = 1;
+		else
+			success = __atomic_compare_exchange_n(&r->cons.head,
+							old_head, *new_head,
+							0, __ATOMIC_ACQUIRE,
+							__ATOMIC_RELAXED);
+	} while (unlikely(success == 0));
+	return n;
+}
+
+#endif /* _RTE_RING_C11_MEM_H_ */
diff --git a/src/spdk/dpdk/lib/librte_ring/rte_ring_generic.h b/src/spdk/dpdk/lib/librte_ring/rte_ring_generic.h
new file mode 100644
index 00000000..ea7dbe5b
--- /dev/null
+++ b/src/spdk/dpdk/lib/librte_ring/rte_ring_generic.h
@@ -0,0 +1,170 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ *
+ * Copyright (c) 2010-2017 Intel Corporation
+ * Copyright (c) 2007-2009 Kip Macy kmacy@freebsd.org
+ * All rights reserved.
+ * Derived from FreeBSD's bufring.h
+ * Used as BSD-3 Licensed with permission from Kip Macy.
+ */
+
+#ifndef _RTE_RING_GENERIC_H_
+#define _RTE_RING_GENERIC_H_
+
+static __rte_always_inline void
+update_tail(struct rte_ring_headtail *ht, uint32_t old_val, uint32_t new_val,
+		uint32_t single, uint32_t enqueue)
+{
+	if (enqueue)
+		rte_smp_wmb();
+	else
+		rte_smp_rmb();
+	/*
+	 * If there are other enqueues/dequeues in progress that preceded us,
+	 * we need to wait for them to complete
+	 */
+	if (!single)
+		while (unlikely(ht->tail != old_val))
+			rte_pause();
+
+	ht->tail = new_val;
+}
+
+/**
+ * @internal This function updates the producer head for enqueue
+ *
+ * @param r
+ *   A pointer to the ring structure
+ * @param is_sp
+ *   Indicates whether multi-producer path is needed or not
+ * @param n
+ *   The number of elements we will want to enqueue, i.e. how far should the
+ *   head be moved
+ * @param behavior
+ *   RTE_RING_QUEUE_FIXED:    Enqueue a fixed number of items from a ring
+ *   RTE_RING_QUEUE_VARIABLE: Enqueue as many items as possible from ring
+ * @param old_head
+ *   Returns head value as it was before the move, i.e. where enqueue starts
+ * @param new_head
+ *   Returns the current/new head value i.e. where enqueue finishes
+ * @param free_entries
+ *   Returns the amount of free space in the ring BEFORE head was moved
+ * @return
+ *   Actual number of objects enqueued.
+ *   If behavior == RTE_RING_QUEUE_FIXED, this will be 0 or n only.
+ */
+static __rte_always_inline unsigned int
+__rte_ring_move_prod_head(struct rte_ring *r, unsigned int is_sp,
+		unsigned int n, enum rte_ring_queue_behavior behavior,
+		uint32_t *old_head, uint32_t *new_head,
+		uint32_t *free_entries)
+{
+	const uint32_t capacity = r->capacity;
+	unsigned int max = n;
+	int success;
+
+	do {
+		/* Reset n to the initial burst count */
+		n = max;
+
+		*old_head = r->prod.head;
+
+		/* add rmb barrier to avoid load/load reorder in weak
+		 * memory model. It is noop on x86
+		 */
+		rte_smp_rmb();
+
+		/*
+		 *  The subtraction is done between two unsigned 32bits value
+		 * (the result is always modulo 32 bits even if we have
+		 * *old_head > cons_tail). So 'free_entries' is always between 0
+		 * and capacity (which is < size).
+		 */
+		*free_entries = (capacity + r->cons.tail - *old_head);
+
+		/* check that we have enough room in ring */
+		if (unlikely(n > *free_entries))
+			n = (behavior == RTE_RING_QUEUE_FIXED) ?
+					0 : *free_entries;
+
+		if (n == 0)
+			return 0;
+
+		*new_head = *old_head + n;
+		if (is_sp)
+			r->prod.head = *new_head, success = 1;
+		else
+			success = rte_atomic32_cmpset(&r->prod.head,
+					*old_head, *new_head);
+	} while (unlikely(success == 0));
+	return n;
+}
+
+/**
+ * @internal This function updates the consumer head for dequeue
+ *
+ * @param r
+ *   A pointer to the ring structure
+ * @param is_sc
+ *   Indicates whether multi-consumer path is needed or not
+ * @param n
+ *   The number of elements we will want to enqueue, i.e. how far should the
+ *   head be moved
+ * @param behavior
+ *   RTE_RING_QUEUE_FIXED:    Dequeue a fixed number of items from a ring
+ *   RTE_RING_QUEUE_VARIABLE: Dequeue as many items as possible from ring
+ * @param old_head
+ *   Returns head value as it was before the move, i.e. where dequeue starts
+ * @param new_head
+ *   Returns the current/new head value i.e. where dequeue finishes
+ * @param entries
+ *   Returns the number of entries in the ring BEFORE head was moved
+ * @return
+ *   - Actual number of objects dequeued.
+ *     If behavior == RTE_RING_QUEUE_FIXED, this will be 0 or n only.
+ */
+static __rte_always_inline unsigned int
+__rte_ring_move_cons_head(struct rte_ring *r, unsigned int is_sc,
+		unsigned int n, enum rte_ring_queue_behavior behavior,
+		uint32_t *old_head, uint32_t *new_head,
+		uint32_t *entries)
+{
+	unsigned int max = n;
+	int success;
+
+	/* move cons.head atomically */
+	do {
+		/* Restore n as it may change every loop */
+		n = max;
+
+		*old_head = r->cons.head;
+
+		/* add rmb barrier to avoid load/load reorder in weak
+		 * memory model. It is noop on x86
+		 */
+		rte_smp_rmb();
+
+		/* The subtraction is done between two unsigned 32bits value
+		 * (the result is always modulo 32 bits even if we have
+		 * cons_head > prod_tail). So 'entries' is always between 0
+		 * and size(ring)-1.
+		 */
+		*entries = (r->prod.tail - *old_head);
+
+		/* Set the actual entries for dequeue */
+		if (n > *entries)
+			n = (behavior == RTE_RING_QUEUE_FIXED) ? 0 : *entries;
+
+		if (unlikely(n == 0))
+			return 0;
+
+		*new_head = *old_head + n;
+		if (is_sc)
+			r->cons.head = *new_head, success = 1;
+		else
+			success = rte_atomic32_cmpset(&r->cons.head, *old_head,
+					*new_head);
+	} while (unlikely(success == 0));
+	return n;
+}
+
+#endif /* _RTE_RING_GENERIC_H_ */
diff --git a/src/spdk/dpdk/lib/librte_ring/rte_ring_version.map b/src/spdk/dpdk/lib/librte_ring/rte_ring_version.map
new file mode 100644
index 00000000..d935efd0
--- /dev/null
+++ b/src/spdk/dpdk/lib/librte_ring/rte_ring_version.map
@@ -0,0 +1,19 @@
+DPDK_2.0 {
+	global:
+
+	rte_ring_create;
+	rte_ring_dump;
+	rte_ring_get_memsize;
+	rte_ring_init;
+	rte_ring_list_dump;
+	rte_ring_lookup;
+
+	local: *;
+};
+
+DPDK_2.2 {
+	global:
+
+	rte_ring_free;
+
+} DPDK_2.0;