From 9f5bc7f1908665d7cf379f698c7bdc53bc10da85 Mon Sep 17 00:00:00 2001 From: Dhananjay Phadke Date: Mon, 9 Mar 2009 08:50:54 +0000 Subject: netxen: refactor netdev open close rearrange open and close into hardware attach(), detach() and nic up() and down(). this will be used for suspend/resume subsequently. Signed-off-by: Dhananjay Phadke Signed-off-by: David S. Miller --- drivers/net/netxen/netxen_nic_main.c | 302 +++++++++++++++++++---------------- 1 file changed, 166 insertions(+), 136 deletions(-) (limited to 'drivers') diff --git a/drivers/net/netxen/netxen_nic_main.c b/drivers/net/netxen/netxen_nic_main.c index c9519843f8c..2953a83bc85 100644 --- a/drivers/net/netxen/netxen_nic_main.c +++ b/drivers/net/netxen/netxen_nic_main.c @@ -94,20 +94,6 @@ static struct pci_device_id netxen_pci_tbl[] __devinitdata = { MODULE_DEVICE_TABLE(pci, netxen_pci_tbl); -/* - * In netxen_nic_down(), we must wait for any pending callback requests into - * netxen_watchdog_task() to complete; eg otherwise the watchdog_timer could be - * reenabled right after it is deleted in netxen_nic_down(). - * FLUSH_SCHEDULED_WORK() does this synchronization. - * - * Normally, schedule_work()/flush_scheduled_work() could have worked, but - * netxen_nic_close() is invoked with kernel rtnl lock held. netif_carrier_off() - * call in netxen_nic_close() triggers a schedule_work(&linkwatch_work), and a - * subsequent call to flush_scheduled_work() in netxen_nic_down() would cause - * linkwatch_event() to be executed which also attempts to acquire the rtnl - * lock thus causing a deadlock. - */ - static struct workqueue_struct *netxen_workq; #define SCHEDULE_WORK(tp) queue_work(netxen_workq, tp) #define FLUSH_SCHEDULED_WORK() flush_workqueue(netxen_workq) @@ -722,6 +708,163 @@ netxen_start_firmware(struct netxen_adapter *adapter) return 0; } +static int +netxen_nic_request_irq(struct netxen_adapter *adapter) +{ + irq_handler_t handler; + unsigned long flags = IRQF_SAMPLE_RANDOM; + struct net_device *netdev = adapter->netdev; + + if ((adapter->msi_mode != MSI_MODE_MULTIFUNC) || + (adapter->intr_scheme != INTR_SCHEME_PERPORT)) { + printk(KERN_ERR "%s: Firmware interrupt scheme is " + "incompatible with driver\n", + netdev->name); + adapter->driver_mismatch = 1; + return -EINVAL; + } + + if (adapter->flags & NETXEN_NIC_MSIX_ENABLED) + handler = netxen_msix_intr; + else if (adapter->flags & NETXEN_NIC_MSI_ENABLED) + handler = netxen_msi_intr; + else { + flags |= IRQF_SHARED; + handler = netxen_intr; + } + adapter->irq = netdev->irq; + + return request_irq(adapter->irq, handler, + flags, netdev->name, adapter); +} + +static int +netxen_nic_up(struct netxen_adapter *adapter, struct net_device *netdev) +{ + int err; + + err = adapter->init_port(adapter, adapter->physical_port); + if (err) { + printk(KERN_ERR "%s: Failed to initialize port %d\n", + netxen_nic_driver_name, adapter->portnum); + return err; + } + adapter->macaddr_set(adapter, netdev->dev_addr); + + netxen_nic_set_link_parameters(adapter); + + netxen_set_multicast_list(netdev); + if (adapter->set_mtu) + adapter->set_mtu(adapter, netdev->mtu); + + adapter->ahw.linkup = 0; + mod_timer(&adapter->watchdog_timer, jiffies); + + napi_enable(&adapter->napi); + netxen_nic_enable_int(adapter); + + return 0; +} + +static void +netxen_nic_down(struct netxen_adapter *adapter, struct net_device *netdev) +{ + netif_carrier_off(netdev); + netif_stop_queue(netdev); + napi_disable(&adapter->napi); + + if (adapter->stop_port) + adapter->stop_port(adapter); + + netxen_nic_disable_int(adapter); + + netxen_release_tx_buffers(adapter); + + FLUSH_SCHEDULED_WORK(); + del_timer_sync(&adapter->watchdog_timer); +} + + +static int +netxen_nic_attach(struct netxen_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + struct pci_dev *pdev = adapter->pdev; + int err, ctx, ring; + + err = netxen_init_firmware(adapter); + if (err != 0) { + printk(KERN_ERR "Failed to init firmware\n"); + return -EIO; + } + + if (adapter->fw_major < 4) + adapter->max_rds_rings = 3; + else + adapter->max_rds_rings = 2; + + err = netxen_alloc_sw_resources(adapter); + if (err) { + printk(KERN_ERR "%s: Error in setting sw resources\n", + netdev->name); + return err; + } + + netxen_nic_clear_stats(adapter); + + err = netxen_alloc_hw_resources(adapter); + if (err) { + printk(KERN_ERR "%s: Error in setting hw resources\n", + netdev->name); + goto err_out_free_sw; + } + + if (adapter->fw_major < 4) { + adapter->crb_addr_cmd_producer = + crb_cmd_producer[adapter->portnum]; + adapter->crb_addr_cmd_consumer = + crb_cmd_consumer[adapter->portnum]; + + netxen_nic_update_cmd_producer(adapter, 0); + netxen_nic_update_cmd_consumer(adapter, 0); + } + + for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) { + for (ring = 0; ring < adapter->max_rds_rings; ring++) + netxen_post_rx_buffers(adapter, ctx, ring); + } + + err = netxen_nic_request_irq(adapter); + if (err) { + dev_err(&pdev->dev, "%s: failed to setup interrupt\n", + netdev->name); + goto err_out_free_rxbuf; + } + + adapter->is_up = NETXEN_ADAPTER_UP_MAGIC; + return 0; + +err_out_free_rxbuf: + netxen_release_rx_buffers(adapter); + netxen_free_hw_resources(adapter); +err_out_free_sw: + netxen_free_sw_resources(adapter); + return err; +} + +static void +netxen_nic_detach(struct netxen_adapter *adapter) +{ + if (adapter->irq) + free_irq(adapter->irq, adapter); + + netxen_release_rx_buffers(adapter); + netxen_free_hw_resources(adapter); + netxen_free_sw_resources(adapter); + + adapter->is_up = 0; +} + static int __devinit netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { @@ -973,9 +1116,7 @@ static void __devexit netxen_nic_remove(struct pci_dev *pdev) unregister_netdev(netdev); if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC) { - netxen_free_hw_resources(adapter); - netxen_release_rx_buffers(adapter); - netxen_free_sw_resources(adapter); + netxen_nic_detach(adapter); if (NX_IS_REVISION_P3(adapter->ahw.revision_id)) netxen_p3_free_mac_list(adapter); @@ -984,9 +1125,6 @@ static void __devexit netxen_nic_remove(struct pci_dev *pdev) if (adapter->portnum == 0) netxen_free_adapter_offload(adapter); - if (adapter->irq) - free_irq(adapter->irq, adapter); - netxen_teardown_intr(adapter); netxen_cleanup_pci_map(adapter); @@ -998,125 +1136,30 @@ static void __devexit netxen_nic_remove(struct pci_dev *pdev) free_netdev(netdev); } -/* - * Called when a network interface is made active - * @returns 0 on success, negative value on failure - */ static int netxen_nic_open(struct net_device *netdev) { struct netxen_adapter *adapter = netdev_priv(netdev); int err = 0; - int ctx, ring; - irq_handler_t handler; - unsigned long flags = IRQF_SAMPLE_RANDOM; if (adapter->driver_mismatch) return -EIO; if (adapter->is_up != NETXEN_ADAPTER_UP_MAGIC) { - err = netxen_init_firmware(adapter); - if (err != 0) { - printk(KERN_ERR "Failed to init firmware\n"); - return -EIO; - } - - if (adapter->fw_major < 4) - adapter->max_rds_rings = 3; - else - adapter->max_rds_rings = 2; - - err = netxen_alloc_sw_resources(adapter); - if (err) { - printk(KERN_ERR "%s: Error in setting sw resources\n", - netdev->name); + err = netxen_nic_attach(adapter); + if (err) return err; - } - - netxen_nic_clear_stats(adapter); - - err = netxen_alloc_hw_resources(adapter); - if (err) { - printk(KERN_ERR "%s: Error in setting hw resources\n", - netdev->name); - goto err_out_free_sw; - } - - if ((adapter->msi_mode != MSI_MODE_MULTIFUNC) || - (adapter->intr_scheme != INTR_SCHEME_PERPORT)) { - printk(KERN_ERR "%s: Firmware interrupt scheme is " - "incompatible with driver\n", - netdev->name); - adapter->driver_mismatch = 1; - goto err_out_free_hw; - } - - if (adapter->fw_major < 4) { - adapter->crb_addr_cmd_producer = - crb_cmd_producer[adapter->portnum]; - adapter->crb_addr_cmd_consumer = - crb_cmd_consumer[adapter->portnum]; - - netxen_nic_update_cmd_producer(adapter, 0); - netxen_nic_update_cmd_consumer(adapter, 0); - } - - for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) { - for (ring = 0; ring < adapter->max_rds_rings; ring++) - netxen_post_rx_buffers(adapter, ctx, ring); - } - if (adapter->flags & NETXEN_NIC_MSIX_ENABLED) - handler = netxen_msix_intr; - else if (adapter->flags & NETXEN_NIC_MSI_ENABLED) - handler = netxen_msi_intr; - else { - flags |= IRQF_SHARED; - handler = netxen_intr; - } - adapter->irq = netdev->irq; - err = request_irq(adapter->irq, handler, - flags, netdev->name, adapter); - if (err) { - printk(KERN_ERR "request_irq failed with: %d\n", err); - goto err_out_free_rxbuf; - } - - adapter->is_up = NETXEN_ADAPTER_UP_MAGIC; } - /* Done here again so that even if phantom sw overwrote it, - * we set it */ - err = adapter->init_port(adapter, adapter->physical_port); - if (err) { - printk(KERN_ERR "%s: Failed to initialize port %d\n", - netxen_nic_driver_name, adapter->portnum); - goto err_out_free_irq; - } - adapter->macaddr_set(adapter, netdev->dev_addr); - - netxen_nic_set_link_parameters(adapter); - - netxen_set_multicast_list(netdev); - if (adapter->set_mtu) - adapter->set_mtu(adapter, netdev->mtu); - - adapter->ahw.linkup = 0; - mod_timer(&adapter->watchdog_timer, jiffies); - - napi_enable(&adapter->napi); - netxen_nic_enable_int(adapter); + err = netxen_nic_up(adapter, netdev); + if (err) + goto err_out; netif_start_queue(netdev); return 0; -err_out_free_irq: - free_irq(adapter->irq, adapter); -err_out_free_rxbuf: - netxen_release_rx_buffers(adapter); -err_out_free_hw: - netxen_free_hw_resources(adapter); -err_out_free_sw: - netxen_free_sw_resources(adapter); +err_out: + netxen_nic_detach(adapter); return err; } @@ -1127,20 +1170,7 @@ static int netxen_nic_close(struct net_device *netdev) { struct netxen_adapter *adapter = netdev_priv(netdev); - netif_carrier_off(netdev); - netif_stop_queue(netdev); - napi_disable(&adapter->napi); - - if (adapter->stop_port) - adapter->stop_port(adapter); - - netxen_nic_disable_int(adapter); - - netxen_release_tx_buffers(adapter); - - FLUSH_SCHEDULED_WORK(); - del_timer_sync(&adapter->watchdog_timer); - + netxen_nic_down(adapter, netdev); return 0; } -- cgit v1.2.3