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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2019 Intel Corporation
*/
#include <string.h>
#include <rte_string_fns.h>
#include <rte_atomic.h>
#include <rte_eal.h>
#include <rte_eal_memconfig.h>
#include <rte_errno.h>
#include <rte_malloc.h>
#include <rte_memzone.h>
#include <rte_rwlock.h>
#include <rte_tailq.h>
#include "rte_stack.h"
#include "stack_pvt.h"
int stack_logtype;
TAILQ_HEAD(rte_stack_list, rte_tailq_entry);
static struct rte_tailq_elem rte_stack_tailq = {
.name = RTE_TAILQ_STACK_NAME,
};
EAL_REGISTER_TAILQ(rte_stack_tailq)
static void
rte_stack_init(struct rte_stack *s, unsigned int count, uint32_t flags)
{
memset(s, 0, sizeof(*s));
if (flags & RTE_STACK_F_LF)
rte_stack_lf_init(s, count);
else
rte_stack_std_init(s);
}
static ssize_t
rte_stack_get_memsize(unsigned int count, uint32_t flags)
{
if (flags & RTE_STACK_F_LF)
return rte_stack_lf_get_memsize(count);
else
return rte_stack_std_get_memsize(count);
}
struct rte_stack *
rte_stack_create(const char *name, unsigned int count, int socket_id,
uint32_t flags)
{
char mz_name[RTE_MEMZONE_NAMESIZE];
struct rte_stack_list *stack_list;
const struct rte_memzone *mz;
struct rte_tailq_entry *te;
struct rte_stack *s;
unsigned int sz;
int ret;
#ifdef RTE_ARCH_64
RTE_BUILD_BUG_ON(sizeof(struct rte_stack_lf_head) != 16);
#else
if (flags & RTE_STACK_F_LF) {
STACK_LOG_ERR("Lock-free stack is not supported on your platform\n");
return NULL;
}
#endif
sz = rte_stack_get_memsize(count, flags);
ret = snprintf(mz_name, sizeof(mz_name), "%s%s",
RTE_STACK_MZ_PREFIX, name);
if (ret < 0 || ret >= (int)sizeof(mz_name)) {
rte_errno = ENAMETOOLONG;
return NULL;
}
te = rte_zmalloc("STACK_TAILQ_ENTRY", sizeof(*te), 0);
if (te == NULL) {
STACK_LOG_ERR("Cannot reserve memory for tailq\n");
rte_errno = ENOMEM;
return NULL;
}
rte_mcfg_tailq_write_lock();
mz = rte_memzone_reserve_aligned(mz_name, sz, socket_id,
0, __alignof__(*s));
if (mz == NULL) {
STACK_LOG_ERR("Cannot reserve stack memzone!\n");
rte_mcfg_tailq_write_unlock();
rte_free(te);
return NULL;
}
s = mz->addr;
rte_stack_init(s, count, flags);
/* Store the name for later lookups */
ret = strlcpy(s->name, name, sizeof(s->name));
if (ret < 0 || ret >= (int)sizeof(s->name)) {
rte_mcfg_tailq_write_unlock();
rte_errno = ENAMETOOLONG;
rte_free(te);
rte_memzone_free(mz);
return NULL;
}
s->memzone = mz;
s->capacity = count;
s->flags = flags;
te->data = s;
stack_list = RTE_TAILQ_CAST(rte_stack_tailq.head, rte_stack_list);
TAILQ_INSERT_TAIL(stack_list, te, next);
rte_mcfg_tailq_write_unlock();
return s;
}
void
rte_stack_free(struct rte_stack *s)
{
struct rte_stack_list *stack_list;
struct rte_tailq_entry *te;
if (s == NULL)
return;
stack_list = RTE_TAILQ_CAST(rte_stack_tailq.head, rte_stack_list);
rte_mcfg_tailq_write_lock();
/* find out tailq entry */
TAILQ_FOREACH(te, stack_list, next) {
if (te->data == s)
break;
}
if (te == NULL) {
rte_mcfg_tailq_write_unlock();
return;
}
TAILQ_REMOVE(stack_list, te, next);
rte_mcfg_tailq_write_unlock();
rte_free(te);
rte_memzone_free(s->memzone);
}
struct rte_stack *
rte_stack_lookup(const char *name)
{
struct rte_stack_list *stack_list;
struct rte_tailq_entry *te;
struct rte_stack *r = NULL;
if (name == NULL) {
rte_errno = EINVAL;
return NULL;
}
stack_list = RTE_TAILQ_CAST(rte_stack_tailq.head, rte_stack_list);
rte_mcfg_tailq_read_lock();
TAILQ_FOREACH(te, stack_list, next) {
r = (struct rte_stack *) te->data;
if (strncmp(name, r->name, RTE_STACK_NAMESIZE) == 0)
break;
}
rte_mcfg_tailq_read_unlock();
if (te == NULL) {
rte_errno = ENOENT;
return NULL;
}
return r;
}
RTE_INIT(librte_stack_init_log)
{
stack_logtype = rte_log_register("lib.stack");
if (stack_logtype >= 0)
rte_log_set_level(stack_logtype, RTE_LOG_NOTICE);
}
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