1 // SPDX-License-Identifier: GPL-2.0
5  * Copyright (C) 2018-2019 Texas Instruments Incorporated - https://www.ti.com/
24 #include <asm-generic/msi.h>
44  * struct ti_sci_inta_event_desc - Description of an event coming to
59  * struct ti_sci_inta_vint_desc - Description of a virtual interrupt coming out
78  * struct ti_sci_inta_irq_domain - Structure representing a TISCI based
87  * @ti_sci_id:		TI-SCI device identifier
89  * @unmapped_dev_ids:	Pointer to an array of TI-SCI device identifiers of
91  *			Unmapped Events are not part of the Global Event Map and
95  *			generating Unmapped Event, we must use the INTA's TI-SCI
123 	if (inta->unmapped_cnt == 0)  in ti_sci_inta_get_dev_id()
127 	 * For devices sending Unmapped Events we must use the INTA's TI-SCI  in ti_sci_inta_get_dev_id()
129 	 * and map it to an interrupt.  in ti_sci_inta_get_dev_id()
131 	for (i = 0; i < inta->unmapped_cnt; i++) {  in ti_sci_inta_get_dev_id()
132 		if (dev_id == inta->unmapped_dev_ids[i]) {  in ti_sci_inta_get_dev_id()
133 			dev_id = inta->ti_sci_id;  in ti_sci_inta_get_dev_id()
142  * ti_sci_inta_irq_handler() - Chained IRQ handler for the vint irqs
154 	domain = vint_desc->domain;  in ti_sci_inta_irq_handler()
155 	inta = domain->host_data;  in ti_sci_inta_irq_handler()
159 	val = readq_relaxed(inta->base + vint_desc->vint_id * 0x1000 +  in ti_sci_inta_irq_handler()
163 		generic_handle_domain_irq(domain, vint_desc->events[bit].hwirq);  in ti_sci_inta_irq_handler()
169  * ti_sci_inta_xlate_irq() - Translate hwirq to parent's hwirq.
173  * Return parent irq number if translation is available else -ENOENT.
178 	struct device_node *np = dev_of_node(&inta->pdev->dev);  in ti_sci_inta_xlate_irq()
180 	const __be32 *range;  in ti_sci_inta_xlate_irq()  local
183 	range = of_get_property(np, "ti,interrupt-ranges", &len);  in ti_sci_inta_xlate_irq()
184 	if (!range)  in ti_sci_inta_xlate_irq()
187 	for (len /= sizeof(*range); len >= 3; len -= 3) {  in ti_sci_inta_xlate_irq()
188 		base = be32_to_cpu(*range++);  in ti_sci_inta_xlate_irq()
189 		parent_base = be32_to_cpu(*range++);  in ti_sci_inta_xlate_irq()
190 		size = be32_to_cpu(*range++);  in ti_sci_inta_xlate_irq()
193 			return vint_id - base + parent_base;  in ti_sci_inta_xlate_irq()
196 	return -ENOENT;  in ti_sci_inta_xlate_irq()
200  * ti_sci_inta_alloc_parent_irq() - Allocate parent irq to Interrupt aggregator
207 	struct ti_sci_inta_irq_domain *inta = domain->host_data;  in ti_sci_inta_alloc_parent_irq()
215 	vint_id = ti_sci_get_free_resource(inta->vint);  in ti_sci_inta_alloc_parent_irq()
217 		return ERR_PTR(-EINVAL);  in ti_sci_inta_alloc_parent_irq()
227 		ret = -ENOMEM;  in ti_sci_inta_alloc_parent_irq()
231 	vint_desc->domain = domain;  in ti_sci_inta_alloc_parent_irq()
232 	vint_desc->vint_id = vint_id;  in ti_sci_inta_alloc_parent_irq()
233 	INIT_LIST_HEAD(&vint_desc->list);  in ti_sci_inta_alloc_parent_irq()
235 	parent_node = of_irq_find_parent(dev_of_node(&inta->pdev->dev));  in ti_sci_inta_alloc_parent_irq()
238 	if (of_device_is_compatible(parent_node, "arm,gic-v3")) {  in ti_sci_inta_alloc_parent_irq()
242 		parent_fwspec.param[1] = p_hwirq - 32;  in ti_sci_inta_alloc_parent_irq()
252 		dev_err(&inta->pdev->dev, "Parent IRQ allocation failed\n");  in ti_sci_inta_alloc_parent_irq()
253 		ret = -EINVAL;  in ti_sci_inta_alloc_parent_irq()
257 	vint_desc->parent_virq = parent_virq;  in ti_sci_inta_alloc_parent_irq()
259 	list_add_tail(&vint_desc->list, &inta->vint_list);  in ti_sci_inta_alloc_parent_irq()
260 	irq_set_chained_handler_and_data(vint_desc->parent_virq,  in ti_sci_inta_alloc_parent_irq()
267 	ti_sci_release_resource(inta->vint, vint_id);  in ti_sci_inta_alloc_parent_irq()
272  * ti_sci_inta_alloc_event() - Attach an event to a IA vint.
283 	struct ti_sci_inta_irq_domain *inta = vint_desc->domain->host_data;  in ti_sci_inta_alloc_event()
291 	event_desc = &vint_desc->events[free_bit];  in ti_sci_inta_alloc_event()
292 	event_desc->hwirq = hwirq;  in ti_sci_inta_alloc_event()
293 	event_desc->vint_bit = free_bit;  in ti_sci_inta_alloc_event()
294 	event_desc->global_event = ti_sci_get_free_resource(inta->global_event);  in ti_sci_inta_alloc_event()
295 	if (event_desc->global_event == TI_SCI_RESOURCE_NULL)  in ti_sci_inta_alloc_event()
296 		return ERR_PTR(-EINVAL);  in ti_sci_inta_alloc_event()
298 	err = inta->sci->ops.rm_irq_ops.set_event_map(inta->sci,  in ti_sci_inta_alloc_event()
300 						      inta->ti_sci_id,  in ti_sci_inta_alloc_event()
301 						      vint_desc->vint_id,  in ti_sci_inta_alloc_event()
302 						      event_desc->global_event,  in ti_sci_inta_alloc_event()
309 	ti_sci_release_resource(inta->global_event, event_desc->global_event);  in ti_sci_inta_alloc_event()
314  * ti_sci_inta_alloc_irq() -  Allocate an irq within INTA domain
319  *	- Find a free bit available in any of the vints available in the list.
320  *	- If not found, allocate a vint from the vint pool
321  *	- Attach the free bit to input hwirq.
327 	struct ti_sci_inta_irq_domain *inta = domain->host_data;  in ti_sci_inta_alloc_irq()
332 	mutex_lock(&inta->vint_mutex);  in ti_sci_inta_alloc_irq()
333 	list_for_each_entry(vint_desc, &inta->vint_list, list) {  in ti_sci_inta_alloc_irq()
334 		free_bit = find_first_zero_bit(vint_desc->event_map,  in ti_sci_inta_alloc_irq()
337 			set_bit(free_bit, vint_desc->event_map);  in ti_sci_inta_alloc_irq()
349 	free_bit = find_first_zero_bit(vint_desc->event_map,  in ti_sci_inta_alloc_irq()
351 	set_bit(free_bit, vint_desc->event_map);  in ti_sci_inta_alloc_irq()
356 		clear_bit(free_bit, vint_desc->event_map);  in ti_sci_inta_alloc_irq()
359 	mutex_unlock(&inta->vint_mutex);  in ti_sci_inta_alloc_irq()
364  * ti_sci_inta_free_parent_irq() - Free a parent irq to INTA
371 	if (find_first_bit(vint_desc->event_map, MAX_EVENTS_PER_VINT) == MAX_EVENTS_PER_VINT) {  in ti_sci_inta_free_parent_irq()
372 		list_del(&vint_desc->list);  in ti_sci_inta_free_parent_irq()
373 		ti_sci_release_resource(inta->vint, vint_desc->vint_id);  in ti_sci_inta_free_parent_irq()
374 		irq_dispose_mapping(vint_desc->parent_virq);  in ti_sci_inta_free_parent_irq()
380  * ti_sci_inta_free_irq() - Free an IRQ within INTA domain
391 	vint_desc = to_vint_desc(event_desc, event_desc->vint_bit);  in ti_sci_inta_free_irq()
392 	inta = vint_desc->domain->host_data;  in ti_sci_inta_free_irq()
395 	mutex_lock(&inta->vint_mutex);  in ti_sci_inta_free_irq()
396 	inta->sci->ops.rm_irq_ops.free_event_map(inta->sci,  in ti_sci_inta_free_irq()
398 						 inta->ti_sci_id,  in ti_sci_inta_free_irq()
399 						 vint_desc->vint_id,  in ti_sci_inta_free_irq()
400 						 event_desc->global_event,  in ti_sci_inta_free_irq()
401 						 event_desc->vint_bit);  in ti_sci_inta_free_irq()
403 	clear_bit(event_desc->vint_bit, vint_desc->event_map);  in ti_sci_inta_free_irq()
404 	ti_sci_release_resource(inta->global_event, event_desc->global_event);  in ti_sci_inta_free_irq()
405 	event_desc->global_event = TI_SCI_RESOURCE_NULL;  in ti_sci_inta_free_irq()
406 	event_desc->hwirq = 0;  in ti_sci_inta_free_irq()
409 	mutex_unlock(&inta->vint_mutex);  in ti_sci_inta_free_irq()
413  * ti_sci_inta_request_resources() - Allocate resources for input irq
427 	event_desc = ti_sci_inta_alloc_irq(data->domain, data->hwirq);  in ti_sci_inta_request_resources()
431 	data->chip_data = event_desc;  in ti_sci_inta_request_resources()
437  * ti_sci_inta_release_resources - Release resources for input irq
441  *	 of parent vint irqs happens in this api.
448 	ti_sci_inta_free_irq(event_desc, data->hwirq);  in ti_sci_inta_release_resources()
452  * ti_sci_inta_manage_event() - Control the event based on the offset
463 	vint_desc = to_vint_desc(event_desc, event_desc->vint_bit);  in ti_sci_inta_manage_event()
464 	inta = data->domain->host_data;  in ti_sci_inta_manage_event()
466 	writeq_relaxed(BIT(event_desc->vint_bit),  in ti_sci_inta_manage_event()
467 		       inta->base + vint_desc->vint_id * 0x1000 + offset);  in ti_sci_inta_manage_event()
471  * ti_sci_inta_mask_irq() - Mask an event
480  * ti_sci_inta_unmask_irq() - Unmask an event
489  * ti_sci_inta_ack_irq() - Ack an event
505 	return -EINVAL;  in ti_sci_inta_set_affinity()
509  * ti_sci_inta_set_type() - Update the trigger type of the irq.
530 		return -EINVAL;  in ti_sci_inta_set_type()
546  * ti_sci_inta_irq_domain_free() - Free an IRQ from the IRQ domain
547  * @domain:	Domain to which the irqs belong
549  * @nr_irqs:	Number of continuous irqs to be freed
560  * ti_sci_inta_irq_domain_alloc() - Allocate Interrupt aggregator IRQs
563  * @nr_irqs:	Continuous irqs to be allocated
576 	irq_domain_set_info(domain, virq, arg->hwirq, &ti_sci_inta_irq_chip,  in ti_sci_inta_irq_domain_alloc()
588 	.name			= "MSI-INTA",
595 	struct platform_device *pdev = to_platform_device(desc->dev);  in ti_sci_inta_msi_set_desc()
597 	arg->desc = desc;  in ti_sci_inta_msi_set_desc()
598 	arg->hwirq = TO_HWIRQ(pdev->id, desc->msi_index);  in ti_sci_inta_msi_set_desc()
614 	struct device *dev = &inta->pdev->dev;  in ti_sci_inta_get_unmapped_sources()
619 	count = of_count_phandle_with_args(node, "ti,unmapped-event-sources", NULL);  in ti_sci_inta_get_unmapped_sources()
623 	inta->unmapped_dev_ids = devm_kcalloc(dev, count,  in ti_sci_inta_get_unmapped_sources()
624 					      sizeof(*inta->unmapped_dev_ids),  in ti_sci_inta_get_unmapped_sources()
626 	if (!inta->unmapped_dev_ids)  in ti_sci_inta_get_unmapped_sources()
627 		return -ENOMEM;  in ti_sci_inta_get_unmapped_sources()
630 	of_for_each_phandle(&it, err, node, "ti,unmapped-event-sources", NULL, 0) {  in ti_sci_inta_get_unmapped_sources()
633 		ret = of_property_read_u32(it.node, "ti,sci-dev-id", &dev_id);  in ti_sci_inta_get_unmapped_sources()
635 			dev_err(dev, "ti,sci-dev-id read failure for %pOFf\n", it.node);  in ti_sci_inta_get_unmapped_sources()
639 		inta->unmapped_dev_ids[i++] = dev_id;  in ti_sci_inta_get_unmapped_sources()
642 	inta->unmapped_cnt = count;  in ti_sci_inta_get_unmapped_sources()
652 	struct device *dev = &pdev->dev;  in ti_sci_inta_irq_domain_probe()
659 		return -ENODEV;  in ti_sci_inta_irq_domain_probe()
664 		return -EPROBE_DEFER;  in ti_sci_inta_irq_domain_probe()
668 		return -ENOMEM;  in ti_sci_inta_irq_domain_probe()
670 	inta->pdev = pdev;  in ti_sci_inta_irq_domain_probe()
671 	inta->sci = devm_ti_sci_get_by_phandle(dev, "ti,sci");  in ti_sci_inta_irq_domain_probe()
672 	if (IS_ERR(inta->sci))  in ti_sci_inta_irq_domain_probe()
673 		return dev_err_probe(dev, PTR_ERR(inta->sci),  in ti_sci_inta_irq_domain_probe()
676 	ret = of_property_read_u32(dev->of_node, "ti,sci-dev-id", &inta->ti_sci_id);  in ti_sci_inta_irq_domain_probe()
678 		dev_err(dev, "missing 'ti,sci-dev-id' property\n");  in ti_sci_inta_irq_domain_probe()
679 		return -EINVAL;  in ti_sci_inta_irq_domain_probe()
682 	inta->vint = devm_ti_sci_get_resource(inta->sci, dev, inta->ti_sci_id,  in ti_sci_inta_irq_domain_probe()
684 	if (IS_ERR(inta->vint)) {  in ti_sci_inta_irq_domain_probe()
686 		return PTR_ERR(inta->vint);  in ti_sci_inta_irq_domain_probe()
689 	inta->global_event = devm_ti_sci_get_resource(inta->sci, dev, inta->ti_sci_id,  in ti_sci_inta_irq_domain_probe()
691 	if (IS_ERR(inta->global_event)) {  in ti_sci_inta_irq_domain_probe()
693 		return PTR_ERR(inta->global_event);  in ti_sci_inta_irq_domain_probe()
696 	inta->base = devm_platform_ioremap_resource(pdev, 0);  in ti_sci_inta_irq_domain_probe()
697 	if (IS_ERR(inta->base))  in ti_sci_inta_irq_domain_probe()
698 		return PTR_ERR(inta->base);  in ti_sci_inta_irq_domain_probe()
705 				       ti_sci_get_num_resources(inta->vint),  in ti_sci_inta_irq_domain_probe()
709 		return -ENOMEM;  in ti_sci_inta_irq_domain_probe()
718 		return -ENOMEM;  in ti_sci_inta_irq_domain_probe()
721 	INIT_LIST_HEAD(&inta->vint_list);  in ti_sci_inta_irq_domain_probe()
722 	mutex_init(&inta->vint_mutex);  in ti_sci_inta_irq_domain_probe()
724 	dev_info(dev, "Interrupt Aggregator domain %d created\n", inta->ti_sci_id);  in ti_sci_inta_irq_domain_probe()
730 	{ .compatible = "ti,sci-inta", },
738 		.name = "ti-sci-inta",