1 // SPDX-License-Identifier: GPL-2.0
9 #include <linux/dma-iommu.h>
19 #include <linux/irqchip/arm-gic-v3.h>
33 	.name			= "MBI",
50 	 * Using ACPI? There is no MBI support in the spec, you  in mbi_irq_gic_domain_alloc()
53 	if (!is_of_node(domain->parent->fwnode))  in mbi_irq_gic_domain_alloc()
54 		return -EINVAL;  in mbi_irq_gic_domain_alloc()
61 	fwspec.fwnode = domain->parent->fwnode;  in mbi_irq_gic_domain_alloc()
64 	fwspec.param[1] = hwirq - 32;  in mbi_irq_gic_domain_alloc()
71 	d = irq_domain_get_irq_data(domain->parent, virq);  in mbi_irq_gic_domain_alloc()
72 	return d->chip->irq_set_type(d, IRQ_TYPE_EDGE_RISING);  in mbi_irq_gic_domain_alloc()
75 static void mbi_free_msi(struct mbi_range *mbi, unsigned int hwirq,  in mbi_free_msi()  argument
79 	bitmap_release_region(mbi->bm, hwirq - mbi->spi_start,  in mbi_free_msi()
88 	struct mbi_range *mbi = NULL;  in mbi_irq_domain_alloc()  local
97 			mbi = &mbi_ranges[i];  in mbi_irq_domain_alloc()
103 	if (!mbi)  in mbi_irq_domain_alloc()
104 		return -ENOSPC;  in mbi_irq_domain_alloc()
106 	hwirq = mbi->spi_start + offset;  in mbi_irq_domain_alloc()
108 	err = iommu_dma_prepare_msi(info->desc,  in mbi_irq_domain_alloc()
119 					      &mbi_irq_chip, mbi);  in mbi_irq_domain_alloc()
126 	mbi_free_msi(mbi, hwirq, nr_irqs);  in mbi_irq_domain_alloc()
134 	struct mbi_range *mbi = irq_data_get_irq_chip_data(d);  in mbi_irq_domain_free()  local
136 	mbi_free_msi(mbi, d->hwirq, nr_irqs);  in mbi_irq_domain_free()
149 	msg[0].data = data->parent_data->hwirq;  in mbi_compose_msi_msg()
155 /* PCI-specific irqchip */
186 	*pci_domain = pci_msi_create_irq_domain(nexus_domain->parent->fwnode,  in mbi_allocate_pci_domain()
190 		return -ENOMEM;  in mbi_allocate_pci_domain()
209 	msg[1].data = data->parent_data->hwirq;  in mbi_compose_mbi_msg()
214 /* Platform-MSI specific irqchip */
237 	nexus_domain = irq_domain_create_tree(parent->fwnode,  in mbi_allocate_domains()
240 		return -ENOMEM;  in mbi_allocate_domains()
243 	nexus_domain->parent = parent;  in mbi_allocate_domains()
247 	plat_domain = platform_msi_create_irq_domain(parent->fwnode,  in mbi_allocate_domains()
257 		return -ENOMEM;  in mbi_allocate_domains()
271 	if (!of_property_read_bool(np, "msi-controller"))  in mbi_init()
274 	n = of_property_count_elems_of_size(np, "mbi-ranges", sizeof(u32));  in mbi_init()
276 		return -EINVAL;  in mbi_init()
281 		return -ENOMEM;  in mbi_init()
284 		ret = of_property_read_u32_index(np, "mbi-ranges", n * 2,  in mbi_init()
288 		ret = of_property_read_u32_index(np, "mbi-ranges", n * 2 + 1,  in mbi_init()
296 			ret = -ENOMEM;  in mbi_init()
299 		pr_info("MBI range [%d:%d]\n", mbi_ranges[n].spi_start,  in mbi_init()
300 			mbi_ranges[n].spi_start + mbi_ranges[n].nr_spis - 1);  in mbi_init()
303 	reg = of_get_property(np, "mbi-alias", NULL);  in mbi_init()
307 			ret = -ENXIO;  in mbi_init()
314 			ret = -ENXIO;  in mbi_init()
321 	pr_info("Using MBI frame %pa\n", &mbi_phys_base);  in mbi_init()