1 // SPDX-License-Identifier: GPL-2.0
5  * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
8 #define pr_fmt(fmt) "eiointc: " fmt
21 #include "irq-loongson.h"
53  * Routing registers are 32bit, and there is 8-bit route setting for every
112 		/* EIO node 0 is in charge of inter-node interrupt dispatch */  in eiointc_set_irq_route()
137 	struct eiointc_priv *priv = d->domain->host_data;  in eiointc_set_irq_affinity()
141 	cpu = cpumask_first_and_and(&priv->cpuspan_map, affinity, cpu_online_mask);  in eiointc_set_irq_affinity()
144 		return -EINVAL;  in eiointc_set_irq_affinity()
147 	vector = d->hwirq;  in eiointc_set_irq_affinity()
150 	if (priv->flags & EIOINTC_USE_CPU_ENCODE) {  in eiointc_set_irq_affinity()
157 			     0x0, priv->node * CORES_PER_EIO_NODE);  in eiointc_set_irq_affinity()
160 		eiointc_set_irq_route(vector, cpu, priv->node, &priv->node_map);  in eiointc_set_irq_affinity()
164 			     0x0, priv->node * CORES_PER_EIO_NODE);  in eiointc_set_irq_affinity()
180 		if (node_isset(node, eiointc_priv[i]->node_map))  in eiointc_index()
184 	return -1;  in eiointc_index()
197 		return -EINVAL;  in eiointc_router_init()
200 	if (!(eiointc_priv[index]->flags & EIOINTC_USE_CPU_ENCODE))  in eiointc_router_init()
208 		for (i = 0; i < eiointc_priv[0]->vec_count / 32; i++) {  in eiointc_router_init()
213 		for (i = 0; i < eiointc_priv[0]->vec_count / 32 / 4; i++) {  in eiointc_router_init()
219 		for (i = 0; i < eiointc_priv[0]->vec_count / 4; i++) {  in eiointc_router_init()
220 			/* Route to Node-0 Core-0 */  in eiointc_router_init()
221 			if (eiointc_priv[index]->flags & EIOINTC_USE_CPU_ENCODE)  in eiointc_router_init()
226 				bit = (eiointc_priv[index]->node << 4) | 1;  in eiointc_router_init()
232 		for (i = 0; i < eiointc_priv[0]->vec_count / 32; i++) {  in eiointc_router_init()
252 	for (i = 0; i < eiointc_priv[0]->vec_count / VEC_COUNT_PER_REG; i++) {  in eiointc_irq_dispatch()
265 			generic_handle_domain_irq(priv->eiointc_domain, irq);  in eiointc_irq_dispatch()
290 	.name			= "EIOINTC",
305 	struct eiointc_priv *priv = domain->host_data;  in eiointc_domain_alloc()
380 	unsigned int node = (pchpic_entry->address >> 44) & 0xf;  in pch_pic_parse_madt()
397 		node = early_cpu_to_node(eiointc_priv[nr_pics - 1]->node * CORES_PER_EIO_NODE);  in pch_msi_parse_madt()
399 		node = eiointc_priv[nr_pics - 1]->node;  in pch_msi_parse_madt()
432 	node_map = node_map ? node_map : -1ULL;  in eiointc_init()
435 			node_set(cpu_to_eio_node(i), priv->node_map);  in eiointc_init()
436 			cpumask_or(&priv->cpuspan_map, &priv->cpuspan_map,  in eiointc_init()
441 	priv->eiointc_domain = irq_domain_create_linear(priv->domain_handle,  in eiointc_init()
442 							priv->vec_count,  in eiointc_init()
445 	if (!priv->eiointc_domain) {  in eiointc_init()
446 		pr_err("loongson-extioi: cannot add IRQ domain\n");  in eiointc_init()
447 		return -ENOMEM;  in eiointc_init()
460 			priv->flags = EIOINTC_USE_CPU_ENCODE;  in eiointc_init()
471 					  "irqchip/loongarch/eiointc:starting",  in eiointc_init()
487 		return -ENOMEM;  in eiointc_acpi_init()
489 	priv->domain_handle = irq_domain_alloc_named_id_fwnode("EIOPIC",  in eiointc_acpi_init()
490 							       acpi_eiointc->node);  in eiointc_acpi_init()
491 	if (!priv->domain_handle) {  in eiointc_acpi_init()
496 	priv->vec_count = VEC_COUNT;  in eiointc_acpi_init()
497 	priv->node = acpi_eiointc->node;  in eiointc_acpi_init()
499 	parent_irq = irq_create_mapping(parent, acpi_eiointc->cascade);  in eiointc_acpi_init()
501 	ret = eiointc_init(priv, parent_irq, acpi_eiointc->node_map);  in eiointc_acpi_init()
506 		node = early_cpu_to_node(acpi_eiointc->node * CORES_PER_EIO_NODE);  in eiointc_acpi_init()
508 		node = acpi_eiointc->node;  in eiointc_acpi_init()
509 	acpi_set_vec_parent(node, priv->eiointc_domain, pch_group);  in eiointc_acpi_init()
510 	acpi_set_vec_parent(node, priv->eiointc_domain, msi_group);  in eiointc_acpi_init()
519 	irq_domain_free_fwnode(priv->domain_handle);  in eiointc_acpi_init()
520 	priv->domain_handle = NULL;  in eiointc_acpi_init()
524 	return -ENOMEM;  in eiointc_acpi_init()
535 		return -ENOMEM;  in eiointc_of_init()
539 		ret = -ENODEV;  in eiointc_of_init()
548 	 * In particular, the number of devices supported by the LS2K0500  in eiointc_of_init()
551 	if (of_device_is_compatible(of_node, "loongson,ls2k0500-eiointc"))  in eiointc_of_init()
552 		priv->vec_count = 128;  in eiointc_of_init()
554 		priv->vec_count = VEC_COUNT;  in eiointc_of_init()
556 	priv->node = 0;  in eiointc_of_init()
557 	priv->domain_handle = of_node_to_fwnode(of_node);  in eiointc_of_init()
570 IRQCHIP_DECLARE(loongson_ls2k0500_eiointc, "loongson,ls2k0500-eiointc", eiointc_of_init);
571 IRQCHIP_DECLARE(loongson_ls2k2000_eiointc, "loongson,ls2k2000-eiointc", eiointc_of_init);