net: hns: add fini_process for v2 napi process

This patch adds fini_process for v2, it handles the packets recevied
by the hardware in the napi porcess. With this patch, the hardware irq
numbers will drop 50% per sec.

Signed-off-by: Daode Huang <huangdaode@hisilicon.com>
Reviewed-by: Yisen Zhuang <yisen.zhuang@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

diff --git a/drivers/net/ethernet/hisilicon/hns/hns_enet.c b/drivers/net/ethernet/hisilicon/hns/hns_enet.c
index 32ff27028687517f19bc7cb3a1671af90d2cfcff..e6bfc51f80225fc7792ba29f5270866feea1d93c 100644 (file)
--- a/drivers/net/ethernet/hisilicon/hns/hns_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_enet.c
@@ -823,6 +823,8 @@ static void hns_nic_rx_fini_pro(struct hns_nic_ring_data *ring_data)
        struct hnae_ring *ring = ring_data->ring;
        int num = 0;
 
+       ring_data->ring->q->handle->dev->ops->toggle_ring_irq(ring, 0);
+
        /* for hardware bug fixed */
        num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
 
@@ -834,6 +836,20 @@ static void hns_nic_rx_fini_pro(struct hns_nic_ring_data *ring_data)
        }
 }
 
+static void hns_nic_rx_fini_pro_v2(struct hns_nic_ring_data *ring_data)
+{
+       struct hnae_ring *ring = ring_data->ring;
+       int num = 0;
+
+       num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
+
+       if (num == 0)
+               ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
+                       ring, 0);
+       else
+               napi_schedule(&ring_data->napi);
+}
+
 static inline void hns_nic_reclaim_one_desc(struct hnae_ring *ring,
                                            int *bytes, int *pkts)
 {
@@ -935,7 +951,11 @@ static int hns_nic_tx_poll_one(struct hns_nic_ring_data *ring_data,
 static void hns_nic_tx_fini_pro(struct hns_nic_ring_data *ring_data)
 {
        struct hnae_ring *ring = ring_data->ring;
-       int head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
+       int head;
+
+       ring_data->ring->q->handle->dev->ops->toggle_ring_irq(ring, 0);
+
+       head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
 
        if (head != ring->next_to_clean) {
                ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
@@ -945,6 +965,18 @@ static void hns_nic_tx_fini_pro(struct hns_nic_ring_data *ring_data)
        }
 }
 
+static void hns_nic_tx_fini_pro_v2(struct hns_nic_ring_data *ring_data)
+{
+       struct hnae_ring *ring = ring_data->ring;
+       int head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
+
+       if (head == ring->next_to_clean)
+               ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
+                       ring, 0);
+       else
+               napi_schedule(&ring_data->napi);
+}
+
 static void hns_nic_tx_clr_all_bufs(struct hns_nic_ring_data *ring_data)
 {
        struct hnae_ring *ring = ring_data->ring;
@@ -976,10 +1008,7 @@ static int hns_nic_common_poll(struct napi_struct *napi, int budget)
 
        if (clean_complete >= 0 && clean_complete < budget) {
                napi_complete(napi);
-               ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
-                       ring_data->ring, 0);
-               if (ring_data->fini_process)
-                       ring_data->fini_process(ring_data);
+               ring_data->fini_process(ring_data);
                return 0;
        }
 
@@ -1755,7 +1784,8 @@ static int hns_nic_init_ring_data(struct hns_nic_priv *priv)
                rd->queue_index = i;
                rd->ring = &h->qs[i]->tx_ring;
                rd->poll_one = hns_nic_tx_poll_one;
-               rd->fini_process = is_ver1 ? hns_nic_tx_fini_pro : NULL;
+               rd->fini_process = is_ver1 ? hns_nic_tx_fini_pro :
+                       hns_nic_tx_fini_pro_v2;
 
                netif_napi_add(priv->netdev, &rd->napi,
                               hns_nic_common_poll, NIC_TX_CLEAN_MAX_NUM);
@@ -1767,7 +1797,8 @@ static int hns_nic_init_ring_data(struct hns_nic_priv *priv)
                rd->ring = &h->qs[i - h->q_num]->rx_ring;
                rd->poll_one = hns_nic_rx_poll_one;
                rd->ex_process = hns_nic_rx_up_pro;
-               rd->fini_process = is_ver1 ? hns_nic_rx_fini_pro : NULL;
+               rd->fini_process = is_ver1 ? hns_nic_rx_fini_pro :
+                       hns_nic_rx_fini_pro_v2;
 
                netif_napi_add(priv->netdev, &rd->napi,
                               hns_nic_common_poll, NIC_RX_CLEAN_MAX_NUM);