Messages in this thread Patch in this message | | | Date | Thu, 10 May 2007 19:03:25 +0900 | From | Tomohiro Kusumi <> | Subject | [PATCH] PCI legacy I/O port free driver - Making Intel e1000 driver legacy I/O port free |
| |
Hi
As you can see in the "10. pci_enable_device_bars() and Legacy I/O Port space" of the Documentation/pci.txt, the latest kernel has interfaces for PCI device drivers to tell the kernel which resource the driver want to use, ex. I/O port or MMIO.
I've made a patch which makes Intel e1000 driver legacy I/O port free by using the PCI core changes I mentioned above. The Intel e1000 driver can handle some of its devices without using I/O port. So this patch changes the driver not to enable/request I/O port region depending on the device id.
As a result, the driver can handle its device even when there are huge number of PCI devices being used on the system and no I/O port region assigned to the device.
Tomohiro Kusumi
Signed-off-by: Tomohiro Kusumi <kusumi.tomohiro@jp.fujitsu.com>
--- e1000.h | 6 +- e1000_main.c | 152 +++++++++++++++++++++++++++++++---------------------------- 2 files changed, 86 insertions(+), 72 deletions(-)
diff -uprN linux-2.6.21.orig/drivers/net/e1000/e1000.h linux-2.6.21/drivers/net/e1000/e1000.h --- linux-2.6.21.orig/drivers/net/e1000/e1000.h 2007-05-09 18:02:26.000000000 +0900 +++ linux-2.6.21/drivers/net/e1000/e1000.h 2007-05-09 18:02:59.000000000 +0900 @@ -74,8 +74,9 @@ #define BAR_1 1 #define BAR_5 5
-#define INTEL_E1000_ETHERNET_DEVICE(device_id) {\ - PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)} +#define E1000_USE_IOPORT (1 << 0) +#define INTEL_E1000_ETHERNET_DEVICE(device_id, flags) {\ + PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id), .driver_data = flags}
struct e1000_adapter;
@@ -347,6 +348,7 @@ struct e1000_adapter { boolean_t quad_port_a; unsigned long flags; uint32_t eeprom_wol; + int bars; /* BARs to be enabled */ };
enum e1000_state_t { diff -uprN linux-2.6.21.orig/drivers/net/e1000/e1000_main.c linux-2.6.21/drivers/net/e1000/e1000_main.c --- linux-2.6.21.orig/drivers/net/e1000/e1000_main.c 2007-05-09 18:02:27.000000000 +0900 +++ linux-2.6.21/drivers/net/e1000/e1000_main.c 2007-05-09 18:03:00.000000000 +0900 @@ -48,65 +48,65 @@ static char e1000_copyright[] = "Copyrig * {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)} */ static struct pci_device_id e1000_pci_tbl[] = { - INTEL_E1000_ETHERNET_DEVICE(0x1000), - INTEL_E1000_ETHERNET_DEVICE(0x1001), - INTEL_E1000_ETHERNET_DEVICE(0x1004), - INTEL_E1000_ETHERNET_DEVICE(0x1008), - INTEL_E1000_ETHERNET_DEVICE(0x1009), - INTEL_E1000_ETHERNET_DEVICE(0x100C), - INTEL_E1000_ETHERNET_DEVICE(0x100D), - INTEL_E1000_ETHERNET_DEVICE(0x100E), - INTEL_E1000_ETHERNET_DEVICE(0x100F), - INTEL_E1000_ETHERNET_DEVICE(0x1010), - INTEL_E1000_ETHERNET_DEVICE(0x1011), - INTEL_E1000_ETHERNET_DEVICE(0x1012), - INTEL_E1000_ETHERNET_DEVICE(0x1013), - INTEL_E1000_ETHERNET_DEVICE(0x1014), - INTEL_E1000_ETHERNET_DEVICE(0x1015), - INTEL_E1000_ETHERNET_DEVICE(0x1016), - INTEL_E1000_ETHERNET_DEVICE(0x1017), - INTEL_E1000_ETHERNET_DEVICE(0x1018), - INTEL_E1000_ETHERNET_DEVICE(0x1019), - INTEL_E1000_ETHERNET_DEVICE(0x101A), - INTEL_E1000_ETHERNET_DEVICE(0x101D), - INTEL_E1000_ETHERNET_DEVICE(0x101E), - INTEL_E1000_ETHERNET_DEVICE(0x1026), - INTEL_E1000_ETHERNET_DEVICE(0x1027), - INTEL_E1000_ETHERNET_DEVICE(0x1028), - INTEL_E1000_ETHERNET_DEVICE(0x1049), - INTEL_E1000_ETHERNET_DEVICE(0x104A), - INTEL_E1000_ETHERNET_DEVICE(0x104B), - INTEL_E1000_ETHERNET_DEVICE(0x104C), - INTEL_E1000_ETHERNET_DEVICE(0x104D), - INTEL_E1000_ETHERNET_DEVICE(0x105E), - INTEL_E1000_ETHERNET_DEVICE(0x105F), - INTEL_E1000_ETHERNET_DEVICE(0x1060), - INTEL_E1000_ETHERNET_DEVICE(0x1075), - INTEL_E1000_ETHERNET_DEVICE(0x1076), - INTEL_E1000_ETHERNET_DEVICE(0x1077), - INTEL_E1000_ETHERNET_DEVICE(0x1078), - INTEL_E1000_ETHERNET_DEVICE(0x1079), - INTEL_E1000_ETHERNET_DEVICE(0x107A), - INTEL_E1000_ETHERNET_DEVICE(0x107B), - INTEL_E1000_ETHERNET_DEVICE(0x107C), - INTEL_E1000_ETHERNET_DEVICE(0x107D), - INTEL_E1000_ETHERNET_DEVICE(0x107E), - INTEL_E1000_ETHERNET_DEVICE(0x107F), - INTEL_E1000_ETHERNET_DEVICE(0x108A), - INTEL_E1000_ETHERNET_DEVICE(0x108B), - INTEL_E1000_ETHERNET_DEVICE(0x108C), - INTEL_E1000_ETHERNET_DEVICE(0x1096), - INTEL_E1000_ETHERNET_DEVICE(0x1098), - INTEL_E1000_ETHERNET_DEVICE(0x1099), - INTEL_E1000_ETHERNET_DEVICE(0x109A), - INTEL_E1000_ETHERNET_DEVICE(0x10A4), - INTEL_E1000_ETHERNET_DEVICE(0x10B5), - INTEL_E1000_ETHERNET_DEVICE(0x10B9), - INTEL_E1000_ETHERNET_DEVICE(0x10BA), - INTEL_E1000_ETHERNET_DEVICE(0x10BB), - INTEL_E1000_ETHERNET_DEVICE(0x10BC), - INTEL_E1000_ETHERNET_DEVICE(0x10C4), - INTEL_E1000_ETHERNET_DEVICE(0x10C5), + INTEL_E1000_ETHERNET_DEVICE(0x1000, 0), + INTEL_E1000_ETHERNET_DEVICE(0x1001, 0), + INTEL_E1000_ETHERNET_DEVICE(0x1004, 0), + INTEL_E1000_ETHERNET_DEVICE(0x1008, E1000_USE_IOPORT), + INTEL_E1000_ETHERNET_DEVICE(0x1009, E1000_USE_IOPORT), + INTEL_E1000_ETHERNET_DEVICE(0x100C, E1000_USE_IOPORT), + INTEL_E1000_ETHERNET_DEVICE(0x100D, E1000_USE_IOPORT), + INTEL_E1000_ETHERNET_DEVICE(0x100E, E1000_USE_IOPORT), + INTEL_E1000_ETHERNET_DEVICE(0x100F, E1000_USE_IOPORT), + INTEL_E1000_ETHERNET_DEVICE(0x1010, E1000_USE_IOPORT), + INTEL_E1000_ETHERNET_DEVICE(0x1011, E1000_USE_IOPORT), + INTEL_E1000_ETHERNET_DEVICE(0x1012, E1000_USE_IOPORT), + INTEL_E1000_ETHERNET_DEVICE(0x1013, E1000_USE_IOPORT), + INTEL_E1000_ETHERNET_DEVICE(0x1014, E1000_USE_IOPORT), + INTEL_E1000_ETHERNET_DEVICE(0x1015, E1000_USE_IOPORT), + INTEL_E1000_ETHERNET_DEVICE(0x1016, E1000_USE_IOPORT), + INTEL_E1000_ETHERNET_DEVICE(0x1017, E1000_USE_IOPORT), + INTEL_E1000_ETHERNET_DEVICE(0x1018, E1000_USE_IOPORT), + INTEL_E1000_ETHERNET_DEVICE(0x1019, 0), + INTEL_E1000_ETHERNET_DEVICE(0x101A, 0), + INTEL_E1000_ETHERNET_DEVICE(0x101D, E1000_USE_IOPORT), + INTEL_E1000_ETHERNET_DEVICE(0x101E, E1000_USE_IOPORT), + INTEL_E1000_ETHERNET_DEVICE(0x1026, 0), + INTEL_E1000_ETHERNET_DEVICE(0x1027, 0), + INTEL_E1000_ETHERNET_DEVICE(0x1028, 0), + INTEL_E1000_ETHERNET_DEVICE(0x1049, 0), + INTEL_E1000_ETHERNET_DEVICE(0x104A, 0), + INTEL_E1000_ETHERNET_DEVICE(0x104B, 0), + INTEL_E1000_ETHERNET_DEVICE(0x104C, 0), + INTEL_E1000_ETHERNET_DEVICE(0x104D, 0), + INTEL_E1000_ETHERNET_DEVICE(0x105E, 0), + INTEL_E1000_ETHERNET_DEVICE(0x105F, 0), + INTEL_E1000_ETHERNET_DEVICE(0x1060, 0), + INTEL_E1000_ETHERNET_DEVICE(0x1075, 0), + INTEL_E1000_ETHERNET_DEVICE(0x1076, E1000_USE_IOPORT), + INTEL_E1000_ETHERNET_DEVICE(0x1077, E1000_USE_IOPORT), + INTEL_E1000_ETHERNET_DEVICE(0x1078, E1000_USE_IOPORT), + INTEL_E1000_ETHERNET_DEVICE(0x1079, 0), + INTEL_E1000_ETHERNET_DEVICE(0x107A, 0), + INTEL_E1000_ETHERNET_DEVICE(0x107B, 0), + INTEL_E1000_ETHERNET_DEVICE(0x107C, E1000_USE_IOPORT), + INTEL_E1000_ETHERNET_DEVICE(0x107D, 0), + INTEL_E1000_ETHERNET_DEVICE(0x107E, 0), + INTEL_E1000_ETHERNET_DEVICE(0x107F, 0), + INTEL_E1000_ETHERNET_DEVICE(0x108A, 0), + INTEL_E1000_ETHERNET_DEVICE(0x108B, 0), + INTEL_E1000_ETHERNET_DEVICE(0x108C, 0), + INTEL_E1000_ETHERNET_DEVICE(0x1096, 0), + INTEL_E1000_ETHERNET_DEVICE(0x1098, 0), + INTEL_E1000_ETHERNET_DEVICE(0x1099, 0), + INTEL_E1000_ETHERNET_DEVICE(0x109A, 0), + INTEL_E1000_ETHERNET_DEVICE(0x10A4, 0), + INTEL_E1000_ETHERNET_DEVICE(0x10B5, 0), + INTEL_E1000_ETHERNET_DEVICE(0x10B9, 0), + INTEL_E1000_ETHERNET_DEVICE(0x10BA, 0), + INTEL_E1000_ETHERNET_DEVICE(0x10BB, 0), + INTEL_E1000_ETHERNET_DEVICE(0x10BC, 0), + INTEL_E1000_ETHERNET_DEVICE(0x10C4, 0), + INTEL_E1000_ETHERNET_DEVICE(0x10C5, 0), /* required last entry */ {0,} }; @@ -879,7 +879,14 @@ 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; - if ((err = pci_enable_device(pdev))) + int bars; + + if (ent->driver_data & E1000_USE_IOPORT) + bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO); + else + bars = pci_select_bars(pdev, IORESOURCE_MEM); + + if ((err = pci_enable_device_bars(pdev, bars))) return err;
if (!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK)) && @@ -894,7 +901,8 @@ 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); @@ -913,6 +921,7 @@ e1000_probe(struct pci_dev *pdev, adapter->pdev = pdev; adapter->hw.back = adapter; adapter->msg_enable = (1 << debug) - 1; + adapter->bars = bars;
mmio_start = pci_resource_start(pdev, BAR_0); mmio_len = pci_resource_len(pdev, BAR_0); @@ -922,12 +931,15 @@ 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 (ent->driver_data & E1000_USE_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; + } } }
@@ -1190,7 +1202,7 @@ 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); @@ -1242,7 +1254,7 @@ 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);
@@ -5172,7 +5184,7 @@ e1000_resume(struct pci_dev *pdev)
pci_set_power_state(pdev, PCI_D0); pci_restore_state(pdev); - if ((err = pci_enable_device(pdev))) { + if ((err = pci_enable_device_bars(pdev, adapter->bars))) { printk(KERN_ERR "e1000: Cannot enable PCI device from suspend\n"); return err; } - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |