[PATCH v6 11/21] net/cpfl: support write back based on ITR expire

[Mingxia Liu]

Enable write back on ITR expire, then packets can be received one by

Signed-off-by: Mingxia Liu <mingxia.liu at intel.com>
---
 drivers/net/cpfl/cpfl_ethdev.c | 45 +++++++++++++++++++++++++++++++++-
 drivers/net/cpfl/cpfl_ethdev.h |  2 ++
 2 files changed, 46 insertions(+), 1 deletion(-)

diff --git a/drivers/net/cpfl/cpfl_ethdev.c b/drivers/net/cpfl/cpfl_ethdev.c
index f02cbd08d9..7e0630c605 100644
--- a/drivers/net/cpfl/cpfl_ethdev.c
+++ b/drivers/net/cpfl/cpfl_ethdev.c
@@ -212,6 +212,15 @@ cpfl_dev_configure(struct rte_eth_dev *dev)
 	return 0;
 }
 
+static int
+cpfl_config_rx_queues_irqs(struct rte_eth_dev *dev)
+{
+	struct idpf_vport *vport = dev->data->dev_private;
+	uint16_t nb_rx_queues = dev->data->nb_rx_queues;
+
+	return idpf_vport_irq_map_config(vport, nb_rx_queues);
+}
+
 static int
 cpfl_start_queues(struct rte_eth_dev *dev)
 {
@@ -249,12 +258,37 @@ static int
 cpfl_dev_start(struct rte_eth_dev *dev)
 {
 	struct idpf_vport *vport = dev->data->dev_private;
+	struct idpf_adapter *base = vport->adapter;
+	struct cpfl_adapter_ext *adapter = CPFL_ADAPTER_TO_EXT(base);
+	uint16_t num_allocated_vectors = base->caps.num_allocated_vectors;
+	uint16_t req_vecs_num;
 	int ret;
 
+	req_vecs_num = CPFL_DFLT_Q_VEC_NUM;
+	if (req_vecs_num + adapter->used_vecs_num > num_allocated_vectors) {
+		PMD_DRV_LOG(ERR, "The accumulated request vectors' number should be less than %d",
+			    num_allocated_vectors);
+		ret = -EINVAL;
+		goto err_vec;
+	}
+
+	ret = idpf_vc_vectors_alloc(vport, req_vecs_num);
+	if (ret != 0) {
+		PMD_DRV_LOG(ERR, "Failed to allocate interrupt vectors");
+		goto err_vec;
+	}
+	adapter->used_vecs_num += req_vecs_num;
+
+	ret = cpfl_config_rx_queues_irqs(dev);
+	if (ret != 0) {
+		PMD_DRV_LOG(ERR, "Failed to configure irqs");
+		goto err_irq;
+	}
+
 	ret = cpfl_start_queues(dev);
 	if (ret != 0) {
 		PMD_DRV_LOG(ERR, "Failed to start queues");
-		return ret;
+		goto err_startq;
 	}
 
 	cpfl_set_rx_function(dev);
@@ -272,6 +306,11 @@ cpfl_dev_start(struct rte_eth_dev *dev)
 
 err_vport:
 	cpfl_stop_queues(dev);
+err_startq:
+	idpf_vport_irq_unmap_config(vport, dev->data->nb_rx_queues);
+err_irq:
+	idpf_vc_vectors_dealloc(vport);
+err_vec:
 	return ret;
 }
 
@@ -287,6 +326,10 @@ cpfl_dev_stop(struct rte_eth_dev *dev)
 
 	cpfl_stop_queues(dev);
 
+	idpf_vport_irq_unmap_config(vport, dev->data->nb_rx_queues);
+
+	idpf_vc_vectors_dealloc(vport);
+
 	vport->stopped = 1;
 
 	return 0;
diff --git a/drivers/net/cpfl/cpfl_ethdev.h b/drivers/net/cpfl/cpfl_ethdev.h
index 9ca39b4558..cd7f560d19 100644
--- a/drivers/net/cpfl/cpfl_ethdev.h
+++ b/drivers/net/cpfl/cpfl_ethdev.h
@@ -24,6 +24,8 @@
 
 #define CPFL_INVALID_VPORT_IDX	0xffff
 
+#define CPFL_DFLT_Q_VEC_NUM	1
+
 #define CPFL_MIN_BUF_SIZE	1024
 #define CPFL_MAX_FRAME_SIZE	9728
 #define CPFL_DEFAULT_MTU	RTE_ETHER_MTU
-- 
2.25.1