Messages in this thread Patch in this message | | | Date | Fri, 20 Jun 2008 11:55:45 +0900 | From | Taku Izumi <> | Subject | [PATCH 1/3] e1000: make ioport free |
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This patch makes e1000 driver ioport-free. This corrects behavior in probe function so as not to request ioport resources as long as they are not really needed. This is based on the ioport-free patch of e1000 driver from Auke Kok and Tomohiro Kusumi.
Signed-off-by: Tomohiro Kusumi <kusumi.tomohiro@jp.fujitsu.com> Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com> Signed-off-by: Taku Izumi <izumi.taku@jp.fujitsu.com> --- drivers/net/e1000/e1000.h | 4 + drivers/net/e1000/e1000_main.c | 88 +++++++++++++++++++++++++++++++++++------ 2 files changed, 80 insertions(+), 12 deletions(-)
Index: linux-2.6.25.7/drivers/net/e1000/e1000.h =================================================================== --- linux-2.6.25.7.orig/drivers/net/e1000/e1000.h +++ linux-2.6.25.7/drivers/net/e1000/e1000.h @@ -343,6 +343,10 @@ struct e1000_adapter { boolean_t quad_port_a; unsigned long flags; uint32_t eeprom_wol; + + /* for ioport free */ + int bars; + int need_ioport; };
enum e1000_state_t { Index: linux-2.6.25.7/drivers/net/e1000/e1000_main.c =================================================================== --- linux-2.6.25.7.orig/drivers/net/e1000/e1000_main.c +++ linux-2.6.25.7/drivers/net/e1000/e1000_main.c @@ -909,6 +909,44 @@ static void e1000_dump_eeprom(struct e10 }
/** + * e1000_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 +e1000_is_need_ioport(struct pci_dev *pdev) +{ + switch (pdev->device) { + case E1000_DEV_ID_82540EM: + case E1000_DEV_ID_82540EM_LOM: + case E1000_DEV_ID_82540EP: + case E1000_DEV_ID_82540EP_LOM: + case E1000_DEV_ID_82540EP_LP: + case E1000_DEV_ID_82541EI: + case E1000_DEV_ID_82541EI_MOBILE: + case E1000_DEV_ID_82541ER_LOM: + case E1000_DEV_ID_82541ER: + case E1000_DEV_ID_82541GI: + case E1000_DEV_ID_82541GI_LF: + case E1000_DEV_ID_82541GI_MOBILE: + case E1000_DEV_ID_82544EI_COPPER: + case E1000_DEV_ID_82544EI_FIBER: + case E1000_DEV_ID_82544GC_COPPER: + case E1000_DEV_ID_82544GC_LOM: + case E1000_DEV_ID_82545EM_COPPER: + case E1000_DEV_ID_82545EM_FIBER: + case E1000_DEV_ID_82546EB_COPPER: + case E1000_DEV_ID_82546EB_FIBER: + case E1000_DEV_ID_82546EB_QUAD_COPPER: + return true; + default: + return false; + } +} + +/** * e1000_probe - Device Initialization Routine * @pdev: PCI device information struct * @ent: entry in e1000_pci_tbl @@ -932,9 +970,19 @@ e1000_probe(struct pci_dev *pdev, int i, err, pci_using_dac; uint16_t eeprom_data = 0; uint16_t eeprom_apme_mask = E1000_EEPROM_APME; + int bars, need_ioport; DECLARE_MAC_BUF(mac);
- if ((err = pci_enable_device(pdev))) + /* do not allocate ioport bars when not needed */ + need_ioport = e1000_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;
if (!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK)) && @@ -949,7 +997,8 @@ e1000_probe(struct pci_dev *pdev, pci_using_dac = 0; }
- if ((err = pci_request_regions(pdev, e1000_driver_name))) + err = pci_request_selected_regions(pdev, bars, e1000_driver_name); + if (err) goto err_pci_reg;
pci_set_master(pdev); @@ -967,6 +1016,8 @@ e1000_probe(struct pci_dev *pdev, adapter->pdev = pdev; adapter->hw.back = adapter; adapter->msg_enable = (1 << debug) - 1; + adapter->bars = bars; + adapter->need_ioport = need_ioport;
err = -EIO; adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, BAR_0), @@ -974,12 +1025,15 @@ e1000_probe(struct pci_dev *pdev, if (!adapter->hw.hw_addr) goto err_ioremap;
- for (i = BAR_1; i <= BAR_5; i++) { - if (pci_resource_len(pdev, i) == 0) - continue; - if (pci_resource_flags(pdev, i) & IORESOURCE_IO) { - adapter->hw.io_base = pci_resource_start(pdev, i); - break; + if (adapter->need_ioport) { + for (i = BAR_1; i <= BAR_5; i++) { + if (pci_resource_len(pdev, i) == 0) + continue; + if (pci_resource_flags(pdev, i) & IORESOURCE_IO) { + adapter->hw.io_base = + pci_resource_start(pdev, i); + break; + } } }
@@ -1251,7 +1305,7 @@ err_sw_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); @@ -1304,7 +1358,7 @@ e1000_remove(struct pci_dev *pdev) 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);
@@ -5242,7 +5296,12 @@ e1000_resume(struct pci_dev *pdev)
pci_set_power_state(pdev, PCI_D0); pci_restore_state(pdev); - if ((err = pci_enable_device(pdev))) { + + if (adapter->need_ioport) + err = pci_enable_device(pdev); + else + err = pci_enable_device_mem(pdev); + if (err) { printk(KERN_ERR "e1000: Cannot enable PCI device from suspend\n"); return err; } @@ -5337,8 +5396,13 @@ static pci_ers_result_t e1000_io_slot_re { struct net_device *netdev = pci_get_drvdata(pdev); struct e1000_adapter *adapter = netdev->priv; + 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) { printk(KERN_ERR "e1000: Cannot re-enable PCI device after reset.\n"); return PCI_ERS_RESULT_DISCONNECT; }
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