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Date: Fri, 20 Jun 2008 12:10:30 +0900 From: Taku Izumi <izumi.taku@...fujitsu.com> To: linux-kernel@...r.kernel.org, netdev@...r.kernel.org CC: Tomohiro Kusumi <kusumi.tomohiro@...fujitsu.com>, auke-jan.h.kok@...el.com Subject: [PATCH 3/3] igb: make ioport free This patch makes igb driver ioport-free. This corrects behavior in probe function so as not to request ioport resources as long as they are not really needed. Signed-off-by: Taku Izumi <izumi.taku@...fujitsu.com> --- drivers/net/igb/igb.h | 4 +++ drivers/net/igb/igb_main.c | 47 +++++++++++++++++++++++++++++++++++++++------ 2 files changed, 45 insertions(+), 6 deletions(-) Index: linux-2.6.25.7/drivers/net/igb/igb.h =================================================================== --- linux-2.6.25.7.orig/drivers/net/igb/igb.h +++ linux-2.6.25.7/drivers/net/igb/igb.h @@ -271,6 +271,10 @@ struct igb_adapter { unsigned int msi_enabled; u32 eeprom_wol; + + /* for ioport free */ + int bars; + int need_ioport; }; enum e1000_state_t { Index: linux-2.6.25.7/drivers/net/igb/igb_main.c =================================================================== --- linux-2.6.25.7.orig/drivers/net/igb/igb_main.c +++ linux-2.6.25.7/drivers/net/igb/igb_main.c @@ -820,6 +820,21 @@ void igb_reset(struct igb_adapter *adapt } /** + * igb_is_need_ioport - determine if an adapter needs ioport resources or not + * @pdev: PCI device information struct + * + * Returns true if an adapter needs ioport resources + **/ +static int igb_is_need_ioport(struct pci_dev *pdev) +{ + switch (pdev->device) { + /* Currently there are no adapters that need ioport resources */ + default: + return false; + } +} + +/** * igb_probe - Device Initialization Routine * @pdev: PCI device information struct * @ent: entry in igb_pci_tbl @@ -843,8 +858,17 @@ static int __devinit igb_probe(struct pc u16 eeprom_data = 0; u16 eeprom_apme_mask = IGB_EEPROM_APME; u32 part_num; + int bars, need_ioport; - err = pci_enable_device(pdev); + /* do not allocate ioport bars when not needed */ + need_ioport = igb_is_need_ioport(pdev); + if (need_ioport) { + bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO); + err = pci_enable_device(pdev); + } else { + bars = pci_select_bars(pdev, IORESOURCE_MEM); + err = pci_enable_device_mem(pdev); + } if (err) return err; @@ -866,7 +890,7 @@ static int __devinit igb_probe(struct pc } } - err = pci_request_regions(pdev, igb_driver_name); + err = pci_request_selected_regions(pdev, bars, igb_driver_name); if (err) goto err_pci_reg; @@ -886,6 +910,8 @@ static int __devinit igb_probe(struct pc hw = &adapter->hw; hw->back = adapter; adapter->msg_enable = NETIF_MSG_DRV | NETIF_MSG_PROBE; + adapter->bars = bars; + adapter->need_ioport = need_ioport; mmio_start = pci_resource_start(pdev, 0); mmio_len = pci_resource_len(pdev, 0); @@ -1121,7 +1147,7 @@ err_hw_init: err_ioremap: free_netdev(netdev); err_alloc_etherdev: - pci_release_regions(pdev); + pci_release_selected_regions(pdev, bars); err_pci_reg: err_dma: pci_disable_device(pdev); @@ -1168,7 +1194,7 @@ static void __devexit igb_remove(struct iounmap(adapter->hw.hw_addr); if (adapter->hw.flash_address) iounmap(adapter->hw.flash_address); - pci_release_regions(pdev); + pci_release_selected_regions(pdev, adapter->bars); free_netdev(netdev); @@ -3969,7 +3995,11 @@ static int igb_resume(struct pci_dev *pd pci_set_power_state(pdev, PCI_D0); pci_restore_state(pdev); - err = pci_enable_device(pdev); + + if (adapter->need_ioport) + err = pci_enable_device(pdev); + else + err = pci_enable_device_mem(pdev); if (err) { dev_err(&pdev->dev, "igb: Cannot enable PCI device from suspend\n"); @@ -4072,8 +4102,13 @@ static pci_ers_result_t igb_io_slot_rese struct net_device *netdev = pci_get_drvdata(pdev); struct igb_adapter *adapter = netdev_priv(netdev); struct e1000_hw *hw = &adapter->hw; + int err; - if (pci_enable_device(pdev)) { + if (adapter->need_ioport) + err = pci_enable_device(pdev); + else + err = pci_enable_device_mem(pdev); + if (err) { dev_err(&pdev->dev, "Cannot re-enable PCI device after reset.\n"); return PCI_ERS_RESULT_DISCONNECT; -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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