fjes: raise_intr_rxdata_task

This patch add raise_intr_rxdata_task.
Extended Socket Network Device is shared memory
based, so someone's transmission denotes other's
reception. In order to notify receivers, sender
has to raise interruption of receivers.
raise_intr_rxdata_task does this work.

Signed-off-by: Taku Izumi <izumi.taku@jp.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/fjes/fjes.h b/drivers/net/fjes/fjes.h
index 7af4304..8e9899e 100644 (file)
--- a/drivers/net/fjes/fjes.h
+++ b/drivers/net/fjes/fjes.h
@@ -50,6 +50,10 @@ struct fjes_adapter {
 
        bool irq_registered;
 
+       struct workqueue_struct *txrx_wq;
+
+       struct work_struct raise_intr_rxdata_task;
+
        struct fjes_hw hw;
 };
 

diff --git a/drivers/net/fjes/fjes_main.c b/drivers/net/fjes/fjes_main.c
index 220ff3d..80e180f 100644 (file)
--- a/drivers/net/fjes/fjes_main.c
+++ b/drivers/net/fjes/fjes_main.c
@@ -52,6 +52,7 @@ static int fjes_close(struct net_device *);
 static int fjes_setup_resources(struct fjes_adapter *);
 static void fjes_free_resources(struct fjes_adapter *);
 static netdev_tx_t fjes_xmit_frame(struct sk_buff *, struct net_device *);
+static void fjes_raise_intr_rxdata_task(struct work_struct *);
 static irqreturn_t fjes_intr(int, void*);
 
 static int fjes_acpi_add(struct acpi_device *);
@@ -276,6 +277,8 @@ static int fjes_close(struct net_device *netdev)
 
        fjes_free_irq(adapter);
 
+       cancel_work_sync(&adapter->raise_intr_rxdata_task);
+
        fjes_hw_wait_epstop(hw);
 
        fjes_free_resources(adapter);
@@ -404,6 +407,54 @@ static void fjes_free_resources(struct fjes_adapter *adapter)
        }
 }
 
+static void fjes_raise_intr_rxdata_task(struct work_struct *work)
+{
+       struct fjes_adapter *adapter = container_of(work,
+                       struct fjes_adapter, raise_intr_rxdata_task);
+       struct fjes_hw *hw = &adapter->hw;
+       enum ep_partner_status pstatus;
+       int max_epid, my_epid, epid;
+
+       my_epid = hw->my_epid;
+       max_epid = hw->max_epid;
+
+       for (epid = 0; epid < max_epid; epid++)
+               hw->ep_shm_info[epid].tx_status_work = 0;
+
+       for (epid = 0; epid < max_epid; epid++) {
+               if (epid == my_epid)
+                       continue;
+
+               pstatus = fjes_hw_get_partner_ep_status(hw, epid);
+               if (pstatus == EP_PARTNER_SHARED) {
+                       hw->ep_shm_info[epid].tx_status_work =
+                               hw->ep_shm_info[epid].tx.info->v1i.tx_status;
+
+                       if (hw->ep_shm_info[epid].tx_status_work ==
+                               FJES_TX_DELAY_SEND_PENDING) {
+                               hw->ep_shm_info[epid].tx.info->v1i.tx_status =
+                                       FJES_TX_DELAY_SEND_NONE;
+                       }
+               }
+       }
+
+       for (epid = 0; epid < max_epid; epid++) {
+               if (epid == my_epid)
+                       continue;
+
+               pstatus = fjes_hw_get_partner_ep_status(hw, epid);
+               if ((hw->ep_shm_info[epid].tx_status_work ==
+                    FJES_TX_DELAY_SEND_PENDING) &&
+                   (pstatus == EP_PARTNER_SHARED) &&
+                   !(hw->ep_shm_info[epid].rx.info->v1i.rx_status)) {
+                       fjes_hw_raise_interrupt(hw, epid,
+                                               REG_ICTL_MASK_RX_DATA);
+               }
+       }
+
+       usleep_range(500, 1000);
+}
+
 static int fjes_tx_send(struct fjes_adapter *adapter, int dest,
                        void *data, size_t len)
 {
@@ -416,6 +467,9 @@ static int fjes_tx_send(struct fjes_adapter *adapter, int dest,
 
        adapter->hw.ep_shm_info[dest].tx.info->v1i.tx_status =
                FJES_TX_DELAY_SEND_PENDING;
+       if (!work_pending(&adapter->raise_intr_rxdata_task))
+               queue_work(adapter->txrx_wq,
+                          &adapter->raise_intr_rxdata_task);
 
        retval = 0;
        return retval;
@@ -630,6 +684,11 @@ static int fjes_probe(struct platform_device *plat_dev)
        adapter->force_reset = false;
        adapter->open_guard = false;
 
+       adapter->txrx_wq = create_workqueue(DRV_NAME "/txrx");
+
+       INIT_WORK(&adapter->raise_intr_rxdata_task,
+                 fjes_raise_intr_rxdata_task);
+
        res = platform_get_resource(plat_dev, IORESOURCE_MEM, 0);
        hw->hw_res.start = res->start;
        hw->hw_res.size = res->end - res->start + 1;
@@ -669,6 +728,10 @@ static int fjes_remove(struct platform_device *plat_dev)
        struct fjes_adapter *adapter = netdev_priv(netdev);
        struct fjes_hw *hw = &adapter->hw;
 
+       cancel_work_sync(&adapter->raise_intr_rxdata_task);
+       if (adapter->txrx_wq)
+               destroy_workqueue(adapter->txrx_wq);
+
        unregister_netdev(netdev);
 
        fjes_hw_exit(hw);