[dpdk-dev] [PATCH v1 1/1] mempool/octeontx2: fix mempool creation failure

[<vattunuru@marvell.com>]

From: Vamsi Attunuru <vattunuru@marvell.com>

Fix npa pool range errors observed while creating mempool, this issue
happens when mempool objects are from different mem segments.

During mempool creation, octeontx2 mempool driver populates pool range
fields before enqueuing the buffers. If any enqueue or dequeue operation
reaches npa hardware prior to the range field's HW context update,
those ops result in npa range errors. Patch adds a routine to read back
HW context and verify if range fields are updated or not.

Fixes: e5271c507aeb ("mempool/octeontx2: add remaining slow path ops")

Signed-off-by: Vamsi Attunuru <vattunuru@marvell.com>
---
 drivers/mempool/octeontx2/otx2_mempool_ops.c | 37 ++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/drivers/mempool/octeontx2/otx2_mempool_ops.c b/drivers/mempool/octeontx2/otx2_mempool_ops.c
index e1764b0..a60a77a 100644
--- a/drivers/mempool/octeontx2/otx2_mempool_ops.c
+++ b/drivers/mempool/octeontx2/otx2_mempool_ops.c
@@ -600,6 +600,40 @@ npa_lf_aura_pool_pair_free(struct otx2_npa_lf *lf, uint64_t aura_handle)
 }
 
 static int
+npa_lf_aura_range_update_check(uint64_t aura_handle)
+{
+	uint64_t aura_id = npa_lf_aura_handle_to_aura(aura_handle);
+	struct otx2_npa_lf *lf = otx2_npa_lf_obj_get();
+	struct npa_aura_lim *lim = lf->aura_lim;
+	struct npa_aq_enq_req *req;
+	struct npa_aq_enq_rsp *rsp;
+	struct npa_pool_s *pool;
+	int rc;
+
+	req  = otx2_mbox_alloc_msg_npa_aq_enq(lf->mbox);
+
+	req->aura_id = aura_id;
+	req->ctype = NPA_AQ_CTYPE_POOL;
+	req->op = NPA_AQ_INSTOP_READ;
+
+	rc = otx2_mbox_process_msg(lf->mbox, (void *)&rsp);
+	if (rc) {
+		otx2_err("Failed to get pool(0x%"PRIx64") context", aura_id);
+		return rc;
+	}
+
+	pool = &rsp->pool;
+
+	if (lim[aura_id].ptr_start != pool->ptr_start ||
+		lim[aura_id].ptr_end != pool->ptr_end) {
+		otx2_err("Range update failed on pool(0x%"PRIx64")", aura_id);
+		return -ERANGE;
+	}
+
+	return 0;
+}
+
+static int
 otx2_npa_alloc(struct rte_mempool *mp)
 {
 	uint32_t block_size, block_count;
@@ -724,6 +758,9 @@ otx2_npa_populate(struct rte_mempool *mp, unsigned int max_objs, void *vaddr,
 
 	npa_lf_aura_op_range_set(mp->pool_id, iova, iova + len);
 
+	if (npa_lf_aura_range_update_check(mp->pool_id) < 0)
+		return -EBUSY;
+
 	return rte_mempool_op_populate_default(mp, max_objs, vaddr, iova, len,
 					       obj_cb, obj_cb_arg);
 }
-- 
2.8.4