Add Marvell CN9k mempool enqueue/dequeue. Marvell CN9k
supports burst dequeue which allows to dequeue up to 32
pointers using pipelined casp instructions.
Signed-off-by: Pavan Nikhilesh <pbhagavatula@marvell.com>
Signed-off-by: Ashwin Sekhar T K <asekhar@marvell.com>
---
doc/guides/mempool/cnxk.rst | 4 +++
drivers/mempool/cnxk/cn9k_mempool_ops.c | 39 +++++++++++++++++++++++--
2 files changed, 41 insertions(+), 2 deletions(-)
@@ -21,6 +21,10 @@ CNXK NPA PMD supports:
- Ethdev Rx buffer allocation in HW to save CPU cycles in the Rx path.
- Ethdev Tx buffer recycling in HW to save CPU cycles in the Tx path.
+CN9k NPA supports:
+
+- Burst alloc of up to 32 pointers.
+
Prerequisites and Compilation procedure
---------------------------------------
@@ -7,6 +7,41 @@
#include "roc_api.h"
#include "cnxk_mempool.h"
+static int __rte_hot
+cn9k_mempool_enq(struct rte_mempool *mp, void *const *obj_table, unsigned int n)
+{
+ /* Ensure mbuf init changes are written before the free pointers
+ * are enqueued to the stack.
+ */
+ rte_io_wmb();
+ roc_npa_aura_op_bulk_free(mp->pool_id, (const uint64_t *)obj_table, n,
+ 0);
+
+ return 0;
+}
+
+static inline int __rte_hot
+cn9k_mempool_deq(struct rte_mempool *mp, void **obj_table, unsigned int n)
+{
+ unsigned int count;
+
+ count = roc_npa_aura_op_bulk_alloc(mp->pool_id, (uint64_t *)obj_table,
+ n, 0, 1);
+
+ if (unlikely(count != n)) {
+ /* If bulk alloc failed to allocate all pointers, try
+ * allocating remaining pointers with the default alloc
+ * with retry scheme.
+ */
+ if (cnxk_mempool_deq(mp, &obj_table[count], n - count)) {
+ cn9k_mempool_enq(mp, obj_table, count);
+ return -ENOENT;
+ }
+ }
+
+ return 0;
+}
+
static int
cn9k_mempool_alloc(struct rte_mempool *mp)
{
@@ -44,8 +79,8 @@ static struct rte_mempool_ops cn9k_mempool_ops = {
.name = "cn9k_mempool_ops",
.alloc = cn9k_mempool_alloc,
.free = cnxk_mempool_free,
- .enqueue = cnxk_mempool_enq,
- .dequeue = cnxk_mempool_deq,
+ .enqueue = cn9k_mempool_enq,
+ .dequeue = cn9k_mempool_deq,
.get_count = cnxk_mempool_get_count,
.calc_mem_size = cnxk_mempool_calc_mem_size,
.populate = cnxk_mempool_populate,