1 // SPDX-License-Identifier: GPL-2.0
19 #include <linux/irqchip/arm-gic-v3.h>
21 #include "irq-msi-lib.h"
35 	.name			= "MBI",
52 	 * Using ACPI? There is no MBI support in the spec, you  in mbi_irq_gic_domain_alloc()
55 	if (!is_of_node(domain->parent->fwnode))  in mbi_irq_gic_domain_alloc()
56 		return -EINVAL;  in mbi_irq_gic_domain_alloc()
63 	fwspec.fwnode = domain->parent->fwnode;  in mbi_irq_gic_domain_alloc()
66 	fwspec.param[1] = hwirq - 32;  in mbi_irq_gic_domain_alloc()
73 	d = irq_domain_get_irq_data(domain->parent, virq);  in mbi_irq_gic_domain_alloc()
74 	return d->chip->irq_set_type(d, IRQ_TYPE_EDGE_RISING);  in mbi_irq_gic_domain_alloc()
77 static void mbi_free_msi(struct mbi_range *mbi, unsigned int hwirq,  in mbi_free_msi()  argument
81 	bitmap_release_region(mbi->bm, hwirq - mbi->spi_start,  in mbi_free_msi()
90 	struct mbi_range *mbi = NULL;  in mbi_irq_domain_alloc()  local
99 			mbi = &mbi_ranges[i];  in mbi_irq_domain_alloc()
105 	if (!mbi)  in mbi_irq_domain_alloc()
106 		return -ENOSPC;  in mbi_irq_domain_alloc()
108 	hwirq = mbi->spi_start + offset;  in mbi_irq_domain_alloc()
110 	err = iommu_dma_prepare_msi(info->desc,  in mbi_irq_domain_alloc()
121 					      &mbi_irq_chip, mbi);  in mbi_irq_domain_alloc()
128 	mbi_free_msi(mbi, hwirq, nr_irqs);  in mbi_irq_domain_alloc()
136 	struct mbi_range *mbi = irq_data_get_irq_chip_data(d);  in mbi_irq_domain_free()  local
138 	mbi_free_msi(mbi, d->hwirq, nr_irqs);  in mbi_irq_domain_free()
152 	msg[0].data = data->parent_data->hwirq;  in mbi_compose_msi_msg()
163 	msg[1].data = data->parent_data->hwirq;  in mbi_compose_mbi_msg()
174 	switch (info->bus_token) {  in mbi_init_dev_msi_info()
177 		info->chip->irq_compose_msi_msg = mbi_compose_msi_msg;  in mbi_init_dev_msi_info()
181 		info->chip->irq_compose_msi_msg = mbi_compose_mbi_msg;  in mbi_init_dev_msi_info()
182 		info->chip->irq_set_type = irq_chip_set_type_parent;  in mbi_init_dev_msi_info()
183 		info->chip->flags |= IRQCHIP_SUPPORTS_LEVEL_MSI;  in mbi_init_dev_msi_info()
184 		info->flags |= MSI_FLAG_LEVEL_CAPABLE;  in mbi_init_dev_msi_info()
206 	.prefix			= "MBI-",
214 	nexus_domain = irq_domain_create_hierarchy(parent, 0, 0, parent->fwnode,  in mbi_allocate_domain()
217 		return -ENOMEM;  in mbi_allocate_domain()
220 	nexus_domain->flags |= IRQ_DOMAIN_FLAG_MSI_PARENT;  in mbi_allocate_domain()
221 	nexus_domain->msi_parent_ops = &gic_v3_mbi_msi_parent_ops;  in mbi_allocate_domain()
233 	if (!of_property_read_bool(np, "msi-controller"))  in mbi_init()
236 	n = of_property_count_elems_of_size(np, "mbi-ranges", sizeof(u32));  in mbi_init()
238 		return -EINVAL;  in mbi_init()
243 		return -ENOMEM;  in mbi_init()
246 		ret = of_property_read_u32_index(np, "mbi-ranges", n * 2,  in mbi_init()
250 		ret = of_property_read_u32_index(np, "mbi-ranges", n * 2 + 1,  in mbi_init()
257 			ret = -ENOMEM;  in mbi_init()
260 		pr_info("MBI range [%d:%d]\n", mbi_ranges[n].spi_start,  in mbi_init()
261 			mbi_ranges[n].spi_start + mbi_ranges[n].nr_spis - 1);  in mbi_init()
264 	reg = of_get_property(np, "mbi-alias", NULL);  in mbi_init()
268 			ret = -ENXIO;  in mbi_init()
275 			ret = -ENXIO;  in mbi_init()
282 	pr_info("Using MBI frame %pa\n", &mbi_phys_base);  in mbi_init()