qla3xxx: add GRO support

Use napi_complete_done() instead of __napi_complete() to :

1) Get support of gro_flush_timeout if opt-in
2) Not rearm interrupts for busy-polling users.
3) use standard NAPI API.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/qlogic/qla3xxx.c b/drivers/net/ethernet/qlogic/qla3xxx.c
index 5c100ab86c0046ec72a011e5f806d6557ac7482c..ea38236f1ced5c2d40c5bb344defc32142e7842e 100644 (file)
--- a/drivers/net/ethernet/qlogic/qla3xxx.c
+++ b/drivers/net/ethernet/qlogic/qla3xxx.c
@@ -2025,7 +2025,7 @@ static void ql_process_mac_rx_intr(struct ql3_adapter *qdev,
        skb_checksum_none_assert(skb);
        skb->protocol = eth_type_trans(skb, qdev->ndev);
 
-       netif_receive_skb(skb);
+       napi_gro_receive(&qdev->napi, skb);
        lrg_buf_cb2->skb = NULL;
 
        if (qdev->device_id == QL3022_DEVICE_ID)
@@ -2095,7 +2095,7 @@ static void ql_process_macip_rx_intr(struct ql3_adapter *qdev,
        }
        skb2->protocol = eth_type_trans(skb2, qdev->ndev);
 
-       netif_receive_skb(skb2);
+       napi_gro_receive(&qdev->napi, skb2);
        ndev->stats.rx_packets++;
        ndev->stats.rx_bytes += length;
        lrg_buf_cb2->skb = NULL;
@@ -2105,8 +2105,7 @@ static void ql_process_macip_rx_intr(struct ql3_adapter *qdev,
        ql_release_to_lrg_buf_free_list(qdev, lrg_buf_cb2);
 }
 
-static int ql_tx_rx_clean(struct ql3_adapter *qdev,
-                         int *tx_cleaned, int *rx_cleaned, int work_to_do)
+static int ql_tx_rx_clean(struct ql3_adapter *qdev, int budget)
 {
        struct net_rsp_iocb *net_rsp;
        struct net_device *ndev = qdev->ndev;
@@ -2114,7 +2113,7 @@ static int ql_tx_rx_clean(struct ql3_adapter *qdev,
 
        /* While there are entries in the completion queue. */
        while ((le32_to_cpu(*(qdev->prsp_producer_index)) !=
-               qdev->rsp_consumer_index) && (work_done < work_to_do)) {
+               qdev->rsp_consumer_index) && (work_done < budget)) {
 
                net_rsp = qdev->rsp_current;
                rmb();
@@ -2130,21 +2129,20 @@ static int ql_tx_rx_clean(struct ql3_adapter *qdev,
                case OPCODE_OB_MAC_IOCB_FN2:
                        ql_process_mac_tx_intr(qdev, (struct ob_mac_iocb_rsp *)
                                               net_rsp);
-                       (*tx_cleaned)++;
                        break;
 
                case OPCODE_IB_MAC_IOCB:
                case OPCODE_IB_3032_MAC_IOCB:
                        ql_process_mac_rx_intr(qdev, (struct ib_mac_iocb_rsp *)
                                               net_rsp);
-                       (*rx_cleaned)++;
+                       work_done++;
                        break;
 
                case OPCODE_IB_IP_IOCB:
                case OPCODE_IB_3032_IP_IOCB:
                        ql_process_macip_rx_intr(qdev, (struct ib_ip_iocb_rsp *)
                                                 net_rsp);
-                       (*rx_cleaned)++;
+                       work_done++;
                        break;
                default: {
                        u32 *tmp = (u32 *)net_rsp;
@@ -2169,7 +2167,6 @@ static int ql_tx_rx_clean(struct ql3_adapter *qdev,
                        qdev->rsp_current++;
                }
 
-               work_done = *tx_cleaned + *rx_cleaned;
        }
 
        return work_done;
@@ -2178,25 +2175,25 @@ static int ql_tx_rx_clean(struct ql3_adapter *qdev,
 static int ql_poll(struct napi_struct *napi, int budget)
 {
        struct ql3_adapter *qdev = container_of(napi, struct ql3_adapter, napi);
-       int rx_cleaned = 0, tx_cleaned = 0;
-       unsigned long hw_flags;
        struct ql3xxx_port_registers __iomem *port_regs =
                qdev->mem_map_registers;
+       int work_done;
 
-       ql_tx_rx_clean(qdev, &tx_cleaned, &rx_cleaned, budget);
+       work_done = ql_tx_rx_clean(qdev, budget);
 
-       if (tx_cleaned + rx_cleaned != budget) {
-               spin_lock_irqsave(&qdev->hw_lock, hw_flags);
-               __napi_complete(napi);
+       if (work_done < budget && napi_complete_done(napi, work_done)) {
+               unsigned long flags;
+
+               spin_lock_irqsave(&qdev->hw_lock, flags);
                ql_update_small_bufq_prod_index(qdev);
                ql_update_lrg_bufq_prod_index(qdev);
                writel(qdev->rsp_consumer_index,
                            &port_regs->CommonRegs.rspQConsumerIndex);
-               spin_unlock_irqrestore(&qdev->hw_lock, hw_flags);
+               spin_unlock_irqrestore(&qdev->hw_lock, flags);
 
                ql_enable_interrupts(qdev);
        }
-       return tx_cleaned + rx_cleaned;
+       return work_done;
 }
 
 static irqreturn_t ql3xxx_isr(int irq, void *dev_id)