Ejemplos de platform_msi_create_irq_domain en C++ (Cpp)

Ejemplo n.º 1

Archivo: irq-mvebu-gicp.c Proyecto: ReneNyffenegger/linux

static int mvebu_gicp_probe(struct platform_device *pdev)
{
	struct mvebu_gicp *gicp;
	struct irq_domain *inner_domain, *plat_domain, *parent_domain;
	struct device_node *node = pdev->dev.of_node;
	struct device_node *irq_parent_dn;
	int ret, i;

	gicp = devm_kzalloc(&pdev->dev, sizeof(*gicp), GFP_KERNEL);
	if (!gicp)
		return -ENOMEM;

	gicp->dev = &pdev->dev;
	spin_lock_init(&gicp->spi_lock);

	gicp->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!gicp->res)
		return -ENODEV;

	ret = of_property_count_u32_elems(node, "marvell,spi-ranges");
	if (ret < 0)
		return ret;

	gicp->spi_ranges_cnt = ret / 2;

	gicp->spi_ranges =
		devm_kzalloc(&pdev->dev,
			     gicp->spi_ranges_cnt *
			     sizeof(struct mvebu_gicp_spi_range),
			     GFP_KERNEL);
	if (!gicp->spi_ranges)
		return -ENOMEM;

	for (i = 0; i < gicp->spi_ranges_cnt; i++) {
		of_property_read_u32_index(node, "marvell,spi-ranges",
					   i * 2,
					   &gicp->spi_ranges[i].start);

		of_property_read_u32_index(node, "marvell,spi-ranges",
					   i * 2 + 1,
					   &gicp->spi_ranges[i].count);

		gicp->spi_cnt += gicp->spi_ranges[i].count;
	}

	gicp->spi_bitmap = devm_kzalloc(&pdev->dev,
				BITS_TO_LONGS(gicp->spi_cnt) * sizeof(long),
				GFP_KERNEL);
	if (!gicp->spi_bitmap)
		return -ENOMEM;

	irq_parent_dn = of_irq_find_parent(node);
	if (!irq_parent_dn) {
		dev_err(&pdev->dev, "failed to find parent IRQ node\n");
		return -ENODEV;
	}

	parent_domain = irq_find_host(irq_parent_dn);
	if (!parent_domain) {
		dev_err(&pdev->dev, "failed to find parent IRQ domain\n");
		return -ENODEV;
	}

	inner_domain = irq_domain_create_hierarchy(parent_domain, 0,
						   gicp->spi_cnt,
						   of_node_to_fwnode(node),
						   &gicp_domain_ops, gicp);
	if (!inner_domain)
		return -ENOMEM;


	plat_domain = platform_msi_create_irq_domain(of_node_to_fwnode(node),
						     &gicp_msi_domain_info,
						     inner_domain);
	if (!plat_domain) {
		irq_domain_remove(inner_domain);
		return -ENOMEM;
	}

	platform_set_drvdata(pdev, gicp);

	return 0;
}

Ejemplo n.º 2

Archivo: irq-gic-v2m.c Proyecto: DenisLug/mptcp

static int __init gicv2m_init_one(struct device_node *node,
				  struct irq_domain *parent)
{
	int ret;
	struct v2m_data *v2m;
	struct irq_domain *inner_domain, *pci_domain, *plat_domain;

	v2m = kzalloc(sizeof(struct v2m_data), GFP_KERNEL);
	if (!v2m) {
		pr_err("Failed to allocate struct v2m_data.\n");
		return -ENOMEM;
	}

	ret = of_address_to_resource(node, 0, &v2m->res);
	if (ret) {
		pr_err("Failed to allocate v2m resource.\n");
		goto err_free_v2m;
	}

	v2m->base = ioremap(v2m->res.start, resource_size(&v2m->res));
	if (!v2m->base) {
		pr_err("Failed to map GICv2m resource\n");
		ret = -ENOMEM;
		goto err_free_v2m;
	}

	if (!of_property_read_u32(node, "arm,msi-base-spi", &v2m->spi_start) &&
	    !of_property_read_u32(node, "arm,msi-num-spis", &v2m->nr_spis)) {
		pr_info("Overriding V2M MSI_TYPER (base:%u, num:%u)\n",
			v2m->spi_start, v2m->nr_spis);
	} else {
		u32 typer = readl_relaxed(v2m->base + V2M_MSI_TYPER);

		v2m->spi_start = V2M_MSI_TYPER_BASE_SPI(typer);
		v2m->nr_spis = V2M_MSI_TYPER_NUM_SPI(typer);
	}

	if (!is_msi_spi_valid(v2m->spi_start, v2m->nr_spis)) {
		ret = -EINVAL;
		goto err_iounmap;
	}

	v2m->bm = kzalloc(sizeof(long) * BITS_TO_LONGS(v2m->nr_spis),
			  GFP_KERNEL);
	if (!v2m->bm) {
		ret = -ENOMEM;
		goto err_iounmap;
	}

	inner_domain = irq_domain_add_tree(node, &gicv2m_domain_ops, v2m);
	if (!inner_domain) {
		pr_err("Failed to create GICv2m domain\n");
		ret = -ENOMEM;
		goto err_free_bm;
	}

	inner_domain->bus_token = DOMAIN_BUS_NEXUS;
	inner_domain->parent = parent;
	pci_domain = pci_msi_create_irq_domain(node, &gicv2m_msi_domain_info,
					       inner_domain);
	plat_domain = platform_msi_create_irq_domain(node,
						     &gicv2m_pmsi_domain_info,
						     inner_domain);
	if (!pci_domain || !plat_domain) {
		pr_err("Failed to create MSI domains\n");
		ret = -ENOMEM;
		goto err_free_domains;
	}

	spin_lock_init(&v2m->msi_cnt_lock);

	pr_info("Node %s: range[%#lx:%#lx], SPI[%d:%d]\n", node->name,
		(unsigned long)v2m->res.start, (unsigned long)v2m->res.end,
		v2m->spi_start, (v2m->spi_start + v2m->nr_spis));

	return 0;

err_free_domains:
	if (plat_domain)
		irq_domain_remove(plat_domain);
	if (pci_domain)
		irq_domain_remove(pci_domain);
	if (inner_domain)
		irq_domain_remove(inner_domain);
err_free_bm:
	kfree(v2m->bm);
err_iounmap:
	iounmap(v2m->base);
err_free_v2m:
	kfree(v2m);
	return ret;
}