C++ (Cpp) pci_is_bridge Examples

Example #1

static void pci_fixup_video(struct pci_dev *pdev)
{
    struct pci_dev *bridge;
    struct pci_bus *bus;
    u16 config;

    /* Is VGA routed to us? */
    bus = pdev->bus;
    while (bus) {
        bridge = bus->self;

        /*
         * From information provided by
         * "David Miller" <*****@*****.**>
         * The bridge control register is valid for PCI header
         * type BRIDGE, or CARDBUS. Host to PCI controllers use
         * PCI header type NORMAL.
         */
        if (bridge && (pci_is_bridge(bridge))) {
            pci_read_config_word(bridge, PCI_BRIDGE_CONTROL,
                                 &config);
            if (!(config & PCI_BRIDGE_CTL_VGA))
                return;
        }
        bus = bus->parent;
    }
    if (!vga_default_device() || pdev == vga_default_device()) {
        pci_read_config_word(pdev, PCI_COMMAND, &config);
        if (config & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) {
            pdev->resource[PCI_ROM_RESOURCE].flags |= IORESOURCE_ROM_SHADOW;
            dev_printk(KERN_DEBUG, &pdev->dev, "Video device with shadowed ROM\n");
        }
    }
}

Example #2

File: pci_endpoint_test.c Project: mkrufky/linux

static int pci_endpoint_test_probe(struct pci_dev *pdev,
				   const struct pci_device_id *ent)
{
	int i;
	int err;
	int irq = 0;
	int id;
	char name[20];
	enum pci_barno bar;
	void __iomem *base;
	struct device *dev = &pdev->dev;
	struct pci_endpoint_test *test;
	struct pci_endpoint_test_data *data;
	enum pci_barno test_reg_bar = BAR_0;
	struct miscdevice *misc_device;

	if (pci_is_bridge(pdev))
		return -ENODEV;

	test = devm_kzalloc(dev, sizeof(*test), GFP_KERNEL);
	if (!test)
		return -ENOMEM;

	test->test_reg_bar = 0;
	test->alignment = 0;
	test->pdev = pdev;

	data = (struct pci_endpoint_test_data *)ent->driver_data;
	if (data) {
		test_reg_bar = data->test_reg_bar;
		test->alignment = data->alignment;
		no_msi = data->no_msi;
	}

	init_completion(&test->irq_raised);
	mutex_init(&test->mutex);

	err = pci_enable_device(pdev);
	if (err) {
		dev_err(dev, "Cannot enable PCI device\n");
		return err;
	}

	err = pci_request_regions(pdev, DRV_MODULE_NAME);
	if (err) {
		dev_err(dev, "Cannot obtain PCI resources\n");
		goto err_disable_pdev;
	}

	pci_set_master(pdev);

	if (!no_msi) {
		irq = pci_alloc_irq_vectors(pdev, 1, 32, PCI_IRQ_MSI);
		if (irq < 0)
			dev_err(dev, "failed to get MSI interrupts\n");
	}

	err = devm_request_irq(dev, pdev->irq, pci_endpoint_test_irqhandler,
			       IRQF_SHARED, DRV_MODULE_NAME, test);
	if (err) {
		dev_err(dev, "failed to request IRQ %d\n", pdev->irq);
		goto err_disable_msi;
	}

	for (i = 1; i < irq; i++) {
		err = devm_request_irq(dev, pdev->irq + i,
				       pci_endpoint_test_irqhandler,
				       IRQF_SHARED, DRV_MODULE_NAME, test);
		if (err)
			dev_err(dev, "failed to request IRQ %d for MSI %d\n",
				pdev->irq + i, i + 1);
	}

	for (bar = BAR_0; bar <= BAR_5; bar++) {
		base = pci_ioremap_bar(pdev, bar);
		if (!base) {
			dev_err(dev, "failed to read BAR%d\n", bar);
			WARN_ON(bar == test_reg_bar);
		}
		test->bar[bar] = base;
	}

	test->base = test->bar[test_reg_bar];
	if (!test->base) {
		dev_err(dev, "Cannot perform PCI test without BAR%d\n",
			test_reg_bar);
		goto err_iounmap;
	}

	pci_set_drvdata(pdev, test);

	id = ida_simple_get(&pci_endpoint_test_ida, 0, 0, GFP_KERNEL);
	if (id < 0) {
		dev_err(dev, "unable to get id\n");
		goto err_iounmap;
	}

	snprintf(name, sizeof(name), DRV_MODULE_NAME ".%d", id);
	misc_device = &test->miscdev;
	misc_device->minor = MISC_DYNAMIC_MINOR;
	misc_device->name = name;
	misc_device->fops = &pci_endpoint_test_fops,

	err = misc_register(misc_device);
	if (err) {
		dev_err(dev, "failed to register device\n");
		goto err_ida_remove;
	}

	return 0;

err_ida_remove:
	ida_simple_remove(&pci_endpoint_test_ida, id);

err_iounmap:
	for (bar = BAR_0; bar <= BAR_5; bar++) {
		if (test->bar[bar])
			pci_iounmap(pdev, test->bar[bar]);
	}

err_disable_msi:
	pci_disable_msi(pdev);
	pci_release_regions(pdev);

err_disable_pdev:
	pci_disable_device(pdev);

	return err;
}