[PATCH 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....@intel.com>
---
 drivers/net/cpfl/cpfl_ethdev.c | 38 ++++++++++++++++++++++++++++++++++
 drivers/net/cpfl/cpfl_ethdev.h |  2 ++
 2 files changed, 40 insertions(+)

diff --git a/drivers/net/cpfl/cpfl_ethdev.c b/drivers/net/cpfl/cpfl_ethdev.c
index d9ac3983aa..ccd9783f5c 100644
--- a/drivers/net/cpfl/cpfl_ethdev.c
+++ b/drivers/net/cpfl/cpfl_ethdev.c
@@ -198,6 +198,15 @@ 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_config_irq_map(vport, nb_rx_queues);
+}
+
 static int
 cpfl_start_queues(struct rte_eth_dev *dev)
 {
@@ -235,6 +244,10 @@ 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;
 
        vport->stopped = 0;
@@ -247,6 +260,27 @@ cpfl_dev_start(struct rte_eth_dev *dev)
 
        vport->max_pkt_len = dev->data->mtu + CPFL_ETH_OVERHEAD;
 
+       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_mtu;
+       }
+
+       ret = idpf_vc_alloc_vectors(vport, req_vecs_num);
+       if (ret != 0) {
+               PMD_DRV_LOG(ERR, "Failed to allocate interrupt vectors");
+               goto err_mtu;
+       }
+       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_mtu;
+       }
+
        ret = cpfl_start_queues(dev);
        if (ret != 0) {
                PMD_DRV_LOG(ERR, "Failed to start queues");
@@ -282,6 +316,10 @@ cpfl_dev_stop(struct rte_eth_dev *dev)
 
        cpfl_stop_queues(dev);
 
+       idpf_config_irq_unmap(vport, dev->data->nb_rx_queues);
+
+       idpf_vc_dealloc_vectors(vport);
+
        vport->stopped = 1;
 
        return 0;
diff --git a/drivers/net/cpfl/cpfl_ethdev.h b/drivers/net/cpfl/cpfl_ethdev.h
index e24ecb614b..714149df32 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
 
-- 
2.25.1