1 // SPDX-License-Identifier: GPL-2.0
3 * Texas Instruments' K3 Interrupt Aggregator MSI bus
5 * Copyright (C) 2018-2019 Texas Instruments Incorporated - http://www.ti.com/
6 * Lokesh Vutla <lokeshvutla@ti.com>
10 #include <linux/irqdomain.h>
11 #include <linux/msi.h>
12 #include <linux/of_address.h>
13 #include <linux/of_device.h>
14 #include <linux/of_irq.h>
15 #include <linux/soc/ti/ti_sci_inta_msi.h>
16 #include <linux/soc/ti/ti_sci_protocol.h>
18 static void ti_sci_inta_msi_write_msg(struct irq_data *data,
24 static void ti_sci_inta_msi_compose_msi_msg(struct irq_data *data,
30 static void ti_sci_inta_msi_update_chip_ops(struct msi_domain_info *info)
32 struct irq_chip *chip = info->chip;
37 chip->irq_request_resources = irq_chip_request_resources_parent;
38 chip->irq_release_resources = irq_chip_release_resources_parent;
39 chip->irq_compose_msi_msg = ti_sci_inta_msi_compose_msi_msg;
40 chip->irq_write_msi_msg = ti_sci_inta_msi_write_msg;
41 chip->irq_set_type = irq_chip_set_type_parent;
42 chip->irq_unmask = irq_chip_unmask_parent;
43 chip->irq_mask = irq_chip_mask_parent;
44 chip->irq_ack = irq_chip_ack_parent;
47 struct irq_domain *ti_sci_inta_msi_create_irq_domain(struct fwnode_handle *fwnode,
48 struct msi_domain_info *info,
49 struct irq_domain *parent)
51 struct irq_domain *domain;
53 ti_sci_inta_msi_update_chip_ops(info);
55 domain = msi_create_irq_domain(fwnode, info, parent);
57 irq_domain_update_bus_token(domain, DOMAIN_BUS_TI_SCI_INTA_MSI);
61 EXPORT_SYMBOL_GPL(ti_sci_inta_msi_create_irq_domain);
63 static void ti_sci_inta_msi_free_descs(struct device *dev)
65 struct msi_desc *desc, *tmp;
67 list_for_each_entry_safe(desc, tmp, dev_to_msi_list(dev), list) {
68 list_del(&desc->list);
73 static int ti_sci_inta_msi_alloc_descs(struct device *dev,
74 struct ti_sci_resource *res)
76 struct msi_desc *msi_desc;
77 int set, i, count = 0;
79 for (set = 0; set < res->sets; set++) {
80 for (i = 0; i < res->desc[set].num; i++) {
81 msi_desc = alloc_msi_entry(dev, 1, NULL);
83 ti_sci_inta_msi_free_descs(dev);
87 msi_desc->inta.dev_index = res->desc[set].start + i;
88 INIT_LIST_HEAD(&msi_desc->list);
89 list_add_tail(&msi_desc->list, dev_to_msi_list(dev));
97 int ti_sci_inta_msi_domain_alloc_irqs(struct device *dev,
98 struct ti_sci_resource *res)
100 struct platform_device *pdev = to_platform_device(dev);
101 struct irq_domain *msi_domain;
104 msi_domain = dev_get_msi_domain(dev);
111 nvec = ti_sci_inta_msi_alloc_descs(dev, res);
115 ret = msi_domain_alloc_irqs(msi_domain, dev, nvec);
117 dev_err(dev, "Failed to allocate IRQs %d\n", ret);
124 ti_sci_inta_msi_free_descs(&pdev->dev);
127 EXPORT_SYMBOL_GPL(ti_sci_inta_msi_domain_alloc_irqs);
129 void ti_sci_inta_msi_domain_free_irqs(struct device *dev)
131 msi_domain_free_irqs(dev->msi_domain, dev);
132 ti_sci_inta_msi_free_descs(dev);
134 EXPORT_SYMBOL_GPL(ti_sci_inta_msi_domain_free_irqs);
136 unsigned int ti_sci_inta_msi_get_virq(struct device *dev, u32 dev_index)
138 struct msi_desc *desc;
140 for_each_msi_entry(desc, dev)
141 if (desc->inta.dev_index == dev_index)
146 EXPORT_SYMBOL_GPL(ti_sci_inta_msi_get_virq);