diff options
Diffstat (limited to 'drivers/mempool/stack')
| -rw-r--r-- | drivers/mempool/stack/Makefile | 51 | ||||
| -rw-r--r-- | drivers/mempool/stack/rte_mempool_stack.c | 147 | ||||
| -rw-r--r-- | drivers/mempool/stack/rte_mempool_stack_version.map | 4 |
3 files changed, 202 insertions, 0 deletions
diff --git a/drivers/mempool/stack/Makefile b/drivers/mempool/stack/Makefile new file mode 100644 index 00000000..8f3125c7 --- /dev/null +++ b/drivers/mempool/stack/Makefile @@ -0,0 +1,51 @@ +# BSD LICENSE +# +# Copyright(c) 2017 NXP. +# 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 NXP 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 $(RTE_SDK)/mk/rte.vars.mk + +# +# library name +# +LIB = librte_mempool_stack.a + +CFLAGS += -O3 +CFLAGS += $(WERROR_FLAGS) + +# Headers +CFLAGS += -I$(RTE_SDK)/lib/librte_mempool + +EXPORT_MAP := rte_mempool_stack_version.map + +LIBABIVER := 1 + +SRCS-$(CONFIG_RTE_DRIVER_MEMPOOL_STACK) += rte_mempool_stack.c + +include $(RTE_SDK)/mk/rte.lib.mk diff --git a/drivers/mempool/stack/rte_mempool_stack.c b/drivers/mempool/stack/rte_mempool_stack.c new file mode 100644 index 00000000..817f77e6 --- /dev/null +++ b/drivers/mempool/stack/rte_mempool_stack.c @@ -0,0 +1,147 @@ +/*- + * BSD LICENSE + * + * Copyright(c) 2016 Intel Corporation. All rights reserved. + * 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 <stdio.h> +#include <rte_mempool.h> +#include <rte_malloc.h> + +struct rte_mempool_stack { + rte_spinlock_t sl; + + uint32_t size; + uint32_t len; + void *objs[]; +}; + +static int +stack_alloc(struct rte_mempool *mp) +{ + struct rte_mempool_stack *s; + unsigned n = mp->size; + int size = sizeof(*s) + (n+16)*sizeof(void *); + + /* Allocate our local memory structure */ + s = rte_zmalloc_socket("mempool-stack", + size, + RTE_CACHE_LINE_SIZE, + mp->socket_id); + if (s == NULL) { + RTE_LOG(ERR, MEMPOOL, "Cannot allocate stack!\n"); + return -ENOMEM; + } + + rte_spinlock_init(&s->sl); + + s->size = n; + mp->pool_data = s; + + return 0; +} + +static int +stack_enqueue(struct rte_mempool *mp, void * const *obj_table, + unsigned n) +{ + struct rte_mempool_stack *s = mp->pool_data; + void **cache_objs; + unsigned index; + + rte_spinlock_lock(&s->sl); + cache_objs = &s->objs[s->len]; + + /* Is there sufficient space in the stack ? */ + if ((s->len + n) > s->size) { + rte_spinlock_unlock(&s->sl); + return -ENOBUFS; + } + + /* Add elements back into the cache */ + for (index = 0; index < n; ++index, obj_table++) + cache_objs[index] = *obj_table; + + s->len += n; + + rte_spinlock_unlock(&s->sl); + return 0; +} + +static int +stack_dequeue(struct rte_mempool *mp, void **obj_table, + unsigned n) +{ + struct rte_mempool_stack *s = mp->pool_data; + void **cache_objs; + unsigned index, len; + + rte_spinlock_lock(&s->sl); + + if (unlikely(n > s->len)) { + rte_spinlock_unlock(&s->sl); + return -ENOENT; + } + + cache_objs = s->objs; + + for (index = 0, len = s->len - 1; index < n; + ++index, len--, obj_table++) + *obj_table = cache_objs[len]; + + s->len -= n; + rte_spinlock_unlock(&s->sl); + return 0; +} + +static unsigned +stack_get_count(const struct rte_mempool *mp) +{ + struct rte_mempool_stack *s = mp->pool_data; + + return s->len; +} + +static void +stack_free(struct rte_mempool *mp) +{ + rte_free((void *)(mp->pool_data)); +} + +static struct rte_mempool_ops ops_stack = { + .name = "stack", + .alloc = stack_alloc, + .free = stack_free, + .enqueue = stack_enqueue, + .dequeue = stack_dequeue, + .get_count = stack_get_count +}; + +MEMPOOL_REGISTER_OPS(ops_stack); diff --git a/drivers/mempool/stack/rte_mempool_stack_version.map b/drivers/mempool/stack/rte_mempool_stack_version.map new file mode 100644 index 00000000..8591cc0b --- /dev/null +++ b/drivers/mempool/stack/rte_mempool_stack_version.map @@ -0,0 +1,4 @@ +DPDK_17.05 { + + local: *; +}; |