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Message-Id: <1440060386-13189-9-git-send-email-izumi.taku@jp.fujitsu.com>
Date: Thu, 20 Aug 2015 17:46:13 +0900
From: Taku Izumi <izumi.taku@...fujitsu.com>
To: netdev@...r.kernel.org, davem@...emloft.net
Cc: platform-driver-x86@...r.kernel.org, dvhart@...radead.org,
rkhan@...hat.com, alexander.h.duyck@...hat.com,
linux-acpi@...r.kernel.org, joe@...ches.com,
sergei.shtylyov@...entembedded.com, stephen@...workplumber.org,
yasu.isimatu@...il.com, Taku Izumi <izumi.taku@...fujitsu.com>
Subject: [PATCH v2.2 09/22] 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@...fujitsu.com>
---
drivers/net/fjes/fjes.h | 4 +++
drivers/net/fjes/fjes_main.c | 64 ++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 68 insertions(+)
diff --git a/drivers/net/fjes/fjes.h b/drivers/net/fjes/fjes.h
index 7af4304..8e9899e 100644
--- 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 be14e66..8d67097 100644
--- 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 +407,55 @@ 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;
+ int epid;
+ int max_epid, my_epid;
+ enum ep_partner_status pstatus;
+
+ 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 +468,9 @@ 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;
@@ -629,6 +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 +729,10 @@ 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);
--
1.8.3.1
--
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