/*-
* BSD LICENSE
- *
- * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ *
+ * Copyright(c) 2010-2015 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
* * 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
#include <rte_log.h>
#include <rte_memory.h>
#include <rte_memzone.h>
+#include <rte_malloc.h>
#include <rte_launch.h>
-#include <rte_tailq.h>
#include <rte_eal.h>
#include <rte_eal_memconfig.h>
#include <rte_atomic.h>
#include "rte_ring.h"
-TAILQ_HEAD(rte_ring_list, rte_ring);
+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,
{
char mz_name[RTE_MEMZONE_NAMESIZE];
struct rte_ring *r;
+ struct rte_tailq_entry *te;
const struct rte_memzone *mz;
- size_t ring_size;
+ ssize_t ring_size;
int mz_flags = 0;
struct rte_ring_list* ring_list = NULL;
+ const unsigned int requested_count = count;
+ int ret;
- /* compilation-time checks */
- RTE_BUILD_BUG_ON((sizeof(struct rte_ring) &
- CACHE_LINE_MASK) != 0);
-#ifdef RTE_RING_SPLIT_PROD_CONS
- RTE_BUILD_BUG_ON((offsetof(struct rte_ring, cons) &
- CACHE_LINE_MASK) != 0);
-#endif
- RTE_BUILD_BUG_ON((offsetof(struct rte_ring, prod) &
- CACHE_LINE_MASK) != 0);
-#ifdef RTE_LIBRTE_RING_DEBUG
- RTE_BUILD_BUG_ON((sizeof(struct rte_ring_debug_stats) &
- CACHE_LINE_MASK) != 0);
- RTE_BUILD_BUG_ON((offsetof(struct rte_ring, stats) &
- CACHE_LINE_MASK) != 0);
-#endif
-
- /* check that we have an initialised tail queue */
- if ((ring_list =
- RTE_TAILQ_LOOKUP_BY_IDX(RTE_TAILQ_RING, rte_ring_list)) == NULL) {
- rte_errno = E_RTE_NO_TAILQ;
- return NULL;
+ 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;
}
- /* count must be a power of 2 */
- if ((!POWEROF2(count)) || (count > RTE_RING_SZ_MASK )) {
- rte_errno = EINVAL;
- 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);
+ 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;
}
- rte_snprintf(mz_name, sizeof(mz_name), "RG_%s", name);
- ring_size = count * sizeof(void *) + sizeof(struct rte_ring);
+ 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(mz_name, ring_size, socket_id, mz_flags);
+ 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;
- /* init the ring structure */
- memset(r, 0, sizeof(*r));
- rte_snprintf(r->name, sizeof(r->name), "%s", name);
- r->flags = flags;
- r->prod.watermark = count;
- r->prod.sp_enqueue = !!(flags & RING_F_SP_ENQ);
- r->cons.sc_dequeue = !!(flags & RING_F_SC_DEQ);
- r->prod.size = r->cons.size = count;
- r->prod.mask = r->cons.mask = count-1;
- r->prod.head = r->cons.head = 0;
- r->prod.tail = r->cons.tail = 0;
-
- TAILQ_INSERT_TAIL(ring_list, r, next);
+ 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;
}
-/*
- * change the high water mark. If *count* is 0, water marking is
- * disabled
- */
-int
-rte_ring_set_water_mark(struct rte_ring *r, unsigned count)
+/* free the ring */
+void
+rte_ring_free(struct rte_ring *r)
{
- if (count >= r->prod.size)
- return -EINVAL;
+ 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 count is 0, disable the watermarking */
- if (count == 0)
- count = r->prod.size;
+ if (rte_memzone_free(r->memzone) != 0) {
+ RTE_LOG(ERR, RING, "Cannot free memory\n");
+ return;
+ }
- r->prod.watermark = count;
- return 0;
+ 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(const struct rte_ring *r)
+rte_ring_dump(FILE *f, const struct rte_ring *r)
{
-#ifdef RTE_LIBRTE_RING_DEBUG
- struct rte_ring_debug_stats sum;
- unsigned lcore_id;
-#endif
-
- printf("ring <%s>@%p\n", r->name, r);
- printf(" flags=%x\n", r->flags);
- printf(" size=%"PRIu32"\n", r->prod.size);
- printf(" ct=%"PRIu32"\n", r->cons.tail);
- printf(" ch=%"PRIu32"\n", r->cons.head);
- printf(" pt=%"PRIu32"\n", r->prod.tail);
- printf(" ph=%"PRIu32"\n", r->prod.head);
- printf(" used=%u\n", rte_ring_count(r));
- printf(" avail=%u\n", rte_ring_free_count(r));
- if (r->prod.watermark == r->prod.size)
- printf(" watermark=0\n");
- else
- printf(" watermark=%"PRIu32"\n", r->prod.watermark);
-
- /* sum and dump statistics */
-#ifdef RTE_LIBRTE_RING_DEBUG
- memset(&sum, 0, sizeof(sum));
- for (lcore_id = 0; lcore_id < RTE_MAX_LCORE; lcore_id++) {
- sum.enq_success_bulk += r->stats[lcore_id].enq_success_bulk;
- sum.enq_success_objs += r->stats[lcore_id].enq_success_objs;
- sum.enq_quota_bulk += r->stats[lcore_id].enq_quota_bulk;
- sum.enq_quota_objs += r->stats[lcore_id].enq_quota_objs;
- sum.enq_fail_bulk += r->stats[lcore_id].enq_fail_bulk;
- sum.enq_fail_objs += r->stats[lcore_id].enq_fail_objs;
- sum.deq_success_bulk += r->stats[lcore_id].deq_success_bulk;
- sum.deq_success_objs += r->stats[lcore_id].deq_success_objs;
- sum.deq_fail_bulk += r->stats[lcore_id].deq_fail_bulk;
- sum.deq_fail_objs += r->stats[lcore_id].deq_fail_objs;
- }
- printf(" size=%"PRIu32"\n", r->prod.size);
- printf(" enq_success_bulk=%"PRIu64"\n", sum.enq_success_bulk);
- printf(" enq_success_objs=%"PRIu64"\n", sum.enq_success_objs);
- printf(" enq_quota_bulk=%"PRIu64"\n", sum.enq_quota_bulk);
- printf(" enq_quota_objs=%"PRIu64"\n", sum.enq_quota_objs);
- printf(" enq_fail_bulk=%"PRIu64"\n", sum.enq_fail_bulk);
- printf(" enq_fail_objs=%"PRIu64"\n", sum.enq_fail_objs);
- printf(" deq_success_bulk=%"PRIu64"\n", sum.deq_success_bulk);
- printf(" deq_success_objs=%"PRIu64"\n", sum.deq_success_objs);
- printf(" deq_fail_bulk=%"PRIu64"\n", sum.deq_fail_bulk);
- printf(" deq_fail_objs=%"PRIu64"\n", sum.deq_fail_objs);
-#else
- printf(" no statistics available\n");
-#endif
+ 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(void)
+rte_ring_list_dump(FILE *f)
{
- const struct rte_ring *mp;
+ const struct rte_tailq_entry *te;
struct rte_ring_list *ring_list;
- /* check that we have an initialised tail queue */
- if ((ring_list =
- RTE_TAILQ_LOOKUP_BY_IDX(RTE_TAILQ_RING, rte_ring_list)) == NULL) {
- rte_errno = E_RTE_NO_TAILQ;
- return;
- }
+ ring_list = RTE_TAILQ_CAST(rte_ring_tailq.head, rte_ring_list);
rte_rwlock_read_lock(RTE_EAL_TAILQ_RWLOCK);
- TAILQ_FOREACH(mp, ring_list, next) {
- rte_ring_dump(mp);
+ TAILQ_FOREACH(te, ring_list, next) {
+ rte_ring_dump(f, (struct rte_ring *) te->data);
}
rte_rwlock_read_unlock(RTE_EAL_TAILQ_RWLOCK);
struct rte_ring *
rte_ring_lookup(const char *name)
{
- struct rte_ring *r;
+ struct rte_tailq_entry *te;
+ struct rte_ring *r = NULL;
struct rte_ring_list *ring_list;
- /* check that we have an initialized tail queue */
- if ((ring_list =
- RTE_TAILQ_LOOKUP_BY_IDX(RTE_TAILQ_RING, rte_ring_list)) == NULL) {
- rte_errno = E_RTE_NO_TAILQ;
- return NULL;
- }
+ ring_list = RTE_TAILQ_CAST(rte_ring_tailq.head, rte_ring_list);
rte_rwlock_read_lock(RTE_EAL_TAILQ_RWLOCK);
-
- TAILQ_FOREACH(r, ring_list, next) {
+
+ 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 (r == NULL)
+ if (te == NULL) {
rte_errno = ENOENT;
+ return NULL;
+ }
return r;
}