From mboxrd@z Thu Jan 1 00:00:00 1970 From: Taku Izumi Subject: [PATCH 18/22] fjes: unshare_watch_task Date: Thu, 18 Jun 2015 09:49:43 +0900 Message-ID: <1434588587-25655-18-git-send-email-izumi.taku@jp.fujitsu.com> References: <1434588359-25589-1-git-send-email-izumi.taku@jp.fujitsu.com> <1434588587-25655-1-git-send-email-izumi.taku@jp.fujitsu.com> Return-path: In-Reply-To: <1434588587-25655-1-git-send-email-izumi.taku@jp.fujitsu.com> Sender: netdev-owner@vger.kernel.org To: platform-driver-x86@vger.kernel.org, dvhart@infradead.org Cc: rkhan@redhat.com, alexander.h.duyck@redhat.com, netdev@vger.kernel.org, linux-acpi@vger.kernel.org, Taku Izumi List-Id: linux-acpi@vger.kernel.org This patch adds unshare_watch_task. Shared buffer's status can be changed into unshared. This task is used to monitor shared buffer's status. Signed-off-by: Taku Izumi --- drivers/platform/x86/fjes/fjes.h | 3 + drivers/platform/x86/fjes/fjes_main.c | 152 ++++++++++++++++++++++++++++++++++ 2 files changed, 155 insertions(+) diff --git a/drivers/platform/x86/fjes/fjes.h b/drivers/platform/x86/fjes/fjes.h index e50fd01..2e814bb 100644 --- a/drivers/platform/x86/fjes/fjes.h +++ b/drivers/platform/x86/fjes/fjes.h @@ -61,6 +61,9 @@ struct fjes_adapter { struct work_struct tx_stall_task; struct work_struct raise_intr_rxdata_task; + struct work_struct unshare_watch_task; + unsigned long unshare_watch_bitmask; + struct delayed_work interrupt_watch_task; bool interrupt_watch_enable; diff --git a/drivers/platform/x86/fjes/fjes_main.c b/drivers/platform/x86/fjes/fjes_main.c index 3931bcc..1bba967 100644 --- a/drivers/platform/x86/fjes/fjes_main.c +++ b/drivers/platform/x86/fjes/fjes_main.c @@ -75,6 +75,7 @@ static int fjes_remove(struct platform_device *); static int fjes_sw_init(struct fjes_adapter *); static void fjes_netdev_setup(struct net_device *); static void fjes_irq_watch_task(struct work_struct *); +static void fjes_watch_unshare_task(struct work_struct *); static void fjes_rx_irq(struct fjes_adapter *, int); static int fjes_poll(struct napi_struct *, int); @@ -317,6 +318,8 @@ static int fjes_close(struct net_device *netdev) fjes_free_irq(adapter); cancel_delayed_work_sync(&adapter->interrupt_watch_task); + cancel_work_sync(&adapter->unshare_watch_task); + adapter->unshare_watch_bitmask = 0; cancel_work_sync(&adapter->raise_intr_rxdata_task); cancel_work_sync(&adapter->tx_stall_task); @@ -1075,6 +1078,8 @@ static int fjes_probe(struct platform_device *plat_dev) INIT_WORK(&adapter->tx_stall_task, fjes_tx_stall_task); INIT_WORK(&adapter->raise_intr_rxdata_task, fjes_raise_intr_rxdata_task); + INIT_WORK(&adapter->unshare_watch_task, fjes_watch_unshare_task); + adapter->unshare_watch_bitmask = 0; INIT_DELAYED_WORK(&adapter->interrupt_watch_task, fjes_irq_watch_task); adapter->interrupt_watch_enable = false; @@ -1121,7 +1126,9 @@ static int fjes_remove(struct platform_device *plat_dev) struct fjes_adapter *adapter = netdev_priv(netdev); struct fjes_hw *hw = &adapter->hw; + cancel_delayed_work_sync(&adapter->interrupt_watch_task); + cancel_work_sync(&adapter->unshare_watch_task); cancel_work_sync(&adapter->raise_intr_rxdata_task); cancel_work_sync(&adapter->tx_stall_task); if (adapter->control_wq) @@ -1185,6 +1192,151 @@ static void fjes_irq_watch_task(struct work_struct *work) } +static void fjes_watch_unshare_task(struct work_struct *work) +{ + struct fjes_adapter *adapter = container_of(work, + struct fjes_adapter, unshare_watch_task); + struct fjes_hw *hw = &adapter->hw; + struct net_device *netdev = adapter->netdev; + int epidx; + int max_epid, my_epid; + unsigned long unshare_watch_bitmask; + int wait_time = 0; + int is_shared; + int ret; + + my_epid = hw->my_epid; + max_epid = hw->max_epid; + + unshare_watch_bitmask = adapter->unshare_watch_bitmask; + adapter->unshare_watch_bitmask = 0; + + while ((unshare_watch_bitmask || hw->txrx_stop_req_bit) && + (wait_time < 3000)) { + + for (epidx = 0; epidx < hw->max_epid; epidx++) { + + if (epidx == hw->my_epid) + continue; + + if (test_bit(epidx, &hw->txrx_stop_req_bit)) { + + is_shared = fjes_hw_epid_is_shared(hw->hw_info.share, epidx); + if (!is_shared || + (is_shared && + (FJES_RX_STOP_REQ_DONE & + hw->ep_shm_info[epidx].rx.info->v1i.rx_status))) { + + mutex_lock(&hw->hw_info.lock); + ret = fjes_hw_unregister_buff_addr(hw, epidx); + switch (ret) { + case 0: + break; + case -ENOMSG: + case -EBUSY: + default: + + if (!work_pending(&adapter->force_close_task)) { + adapter->force_reset = true; + schedule_work(&adapter->force_close_task); + } + break; + } + mutex_unlock(&hw->hw_info.lock); + + fjes_hw_setup_epbuf(&hw->ep_shm_info[epidx].tx, + netdev->dev_addr, netdev->mtu); + + clear_bit(epidx, &hw->txrx_stop_req_bit); + clear_bit(epidx, &unshare_watch_bitmask); + clear_bit(epidx, &hw->hw_info.buffer_unshare_reserve_bit); + + } + } + + is_shared = fjes_hw_epid_is_shared(hw->hw_info.share, epidx); + if (!is_shared && test_bit(epidx, &unshare_watch_bitmask)) { + + if (test_bit(epidx, &hw->hw_info.buffer_unshare_reserve_bit)) { + + mutex_lock(&hw->hw_info.lock); + ret = fjes_hw_unregister_buff_addr(hw, epidx); + switch (ret) { + case 0: + break; + case -ENOMSG: + case -EBUSY: + default: + + if (!work_pending(&adapter->force_close_task)) { + adapter->force_reset = true; + schedule_work(&adapter->force_close_task); + } + break; + } + mutex_unlock(&hw->hw_info.lock); + + fjes_hw_setup_epbuf(&hw->ep_shm_info[epidx].tx, + netdev->dev_addr, netdev->mtu); + + clear_bit(epidx, &hw->txrx_stop_req_bit); + clear_bit(epidx, &unshare_watch_bitmask); + clear_bit(epidx, &hw->hw_info.buffer_unshare_reserve_bit); + + } + } + + } + msleep(100); + wait_time += 100; + } + + if (hw->hw_info.buffer_unshare_reserve_bit) { + + for (epidx = 0; epidx < hw->max_epid; epidx++) { + + if (epidx == hw->my_epid) + continue; + + if (test_bit(epidx, &hw->hw_info.buffer_unshare_reserve_bit)) { + + mutex_lock(&hw->hw_info.lock); + + ret = fjes_hw_unregister_buff_addr(hw, epidx); + switch (ret) { + case 0: + break; + case -ENOMSG: + case -EBUSY: + default: + + if (!work_pending(&adapter->force_close_task)) { + adapter->force_reset = true; + schedule_work(&adapter->force_close_task); + } + break; + } + mutex_unlock(&hw->hw_info.lock); + + fjes_hw_setup_epbuf(&hw->ep_shm_info[epidx].tx, + netdev->dev_addr, netdev->mtu); + + clear_bit(epidx, &hw->txrx_stop_req_bit); + clear_bit(epidx, &unshare_watch_bitmask); + clear_bit(epidx, + &hw->hw_info.buffer_unshare_reserve_bit); + } + + if (test_bit(epidx, &unshare_watch_bitmask)) { + hw->ep_shm_info[epidx].tx.info->v1i.rx_status &= + ~FJES_RX_STOP_REQ_DONE; + } + } + + } + +} + /* * fjes_init_module - Driver Registration Routine * -- 1.8.3.1