1 // SPDX-License-Identifier: GPL-2.0
3  * SG2042 MSI Controller
15 #include <linux/msi.h>
20 #include "irq-msi-lib.h"
40 	guard(mutex)(&data->msi_map_lock);  in sg2042_msi_allocate_hwirq()
41 	first = bitmap_find_free_region(data->msi_map, data->num_irqs,  in sg2042_msi_allocate_hwirq()
43 	return first >= 0 ? first : -ENOSPC;  in sg2042_msi_allocate_hwirq()
48 	guard(mutex)(&data->msi_map_lock);  in sg2042_msi_free_hwirq()
49 	bitmap_release_region(data->msi_map, hwirq, get_count_order(num_req));  in sg2042_msi_free_hwirq()
55 	int bit_off = d->hwirq;  in sg2042_msi_irq_ack()
57 	writel(1 << bit_off, data->reg_clr);  in sg2042_msi_irq_ack()
66 	msg->address_hi = upper_32_bits(data->doorbell_addr);  in sg2042_msi_irq_compose_msi_msg()
67 	msg->address_lo = lower_32_bits(data->doorbell_addr);  in sg2042_msi_irq_compose_msi_msg()
68 	msg->data = 1 << d->hwirq;  in sg2042_msi_irq_compose_msi_msg()
72 	.name			= "SG2042 MSI",
84 	struct sg2042_msi_chipdata *data = domain->host_data;  in sg2042_msi_parent_domain_alloc()
89 	fwspec.fwnode = domain->parent->fwnode;  in sg2042_msi_parent_domain_alloc()
91 	fwspec.param[0] = data->irq_first + hwirq;  in sg2042_msi_parent_domain_alloc()
98 	d = irq_domain_get_irq_data(domain->parent, virq);  in sg2042_msi_parent_domain_alloc()
99 	return d->chip->irq_set_type(d, IRQ_TYPE_EDGE_RISING);  in sg2042_msi_parent_domain_alloc()
105 	struct sg2042_msi_chipdata *data = domain->host_data;  in sg2042_msi_middle_domain_alloc()
137 	sg2042_msi_free_hwirq(data, d->hwirq, nr_irqs);  in sg2042_msi_middle_domain_free()
157 	.prefix			= "SG2042-",
167 	middle_domain = irq_domain_create_hierarchy(plic_domain, 0, data->num_irqs, fwnode,  in sg2042_msi_init_domains()
170 		pr_err("Failed to create the MSI middle domain\n");  in sg2042_msi_init_domains()
171 		return -ENOMEM;  in sg2042_msi_init_domains()
176 	middle_domain->flags |= IRQ_DOMAIN_FLAG_MSI_PARENT;  in sg2042_msi_init_domains()
177 	middle_domain->msi_parent_ops = &sg2042_msi_parent_ops;  in sg2042_msi_init_domains()
186 	struct device *dev = &pdev->dev;  in sg2042_msi_probe()
193 		return -ENOMEM;  in sg2042_msi_probe()
195 	data->reg_clr = devm_platform_ioremap_resource_byname(pdev, "clr");  in sg2042_msi_probe()
196 	if (IS_ERR(data->reg_clr)) {  in sg2042_msi_probe()
198 		return PTR_ERR(data->reg_clr);  in sg2042_msi_probe()
204 		return -EINVAL;  in sg2042_msi_probe()
206 	data->doorbell_addr = res->start;  in sg2042_msi_probe()
208 	ret = fwnode_property_get_reference_args(dev_fwnode(dev), "msi-ranges",  in sg2042_msi_probe()
209 						 "#interrupt-cells", 0, 0, &args);  in sg2042_msi_probe()
211 		dev_err(dev, "Unable to parse MSI vec base\n");  in sg2042_msi_probe()
216 	ret = fwnode_property_get_reference_args(dev_fwnode(dev), "msi-ranges", NULL,  in sg2042_msi_probe()
219 		dev_err(dev, "Unable to parse MSI vec number\n");  in sg2042_msi_probe()
227 		return -ENXIO;  in sg2042_msi_probe()
230 	data->irq_first = (u32)args.args[0];  in sg2042_msi_probe()
231 	data->num_irqs = (u32)args.args[args.nargs - 1];  in sg2042_msi_probe()
233 	mutex_init(&data->msi_map_lock);  in sg2042_msi_probe()
239 	{ .compatible	= "sophgo,sg2042-msi" },
245 		.name		= "sg2042-msi",