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>
13 #include <linux/of_address.h>
14 #include <linux/of_irq.h>
15 #include <linux/platform_device.h>
16 #include <linux/soc/ti/ti_sci_inta_msi.h>
17 #include <linux/soc/ti/ti_sci_protocol.h>
19 static void ti_sci_inta_msi_write_msg(struct irq_data *data,
25 static void ti_sci_inta_msi_compose_msi_msg(struct irq_data *data,
31 static void ti_sci_inta_msi_update_chip_ops(struct msi_domain_info *info)
33 struct irq_chip *chip = info->chip;
38 chip->irq_request_resources = irq_chip_request_resources_parent;
39 chip->irq_release_resources = irq_chip_release_resources_parent;
40 chip->irq_compose_msi_msg = ti_sci_inta_msi_compose_msi_msg;
41 chip->irq_write_msi_msg = ti_sci_inta_msi_write_msg;
42 chip->irq_set_type = irq_chip_set_type_parent;
43 chip->irq_unmask = irq_chip_unmask_parent;
44 chip->irq_mask = irq_chip_mask_parent;
45 chip->irq_ack = irq_chip_ack_parent;
48 struct irq_domain *ti_sci_inta_msi_create_irq_domain(struct fwnode_handle *fwnode,
49 struct msi_domain_info *info,
50 struct irq_domain *parent)
52 struct irq_domain *domain;
54 ti_sci_inta_msi_update_chip_ops(info);
55 info->flags |= MSI_FLAG_FREE_MSI_DESCS;
57 domain = msi_create_irq_domain(fwnode, info, parent);
59 irq_domain_update_bus_token(domain, DOMAIN_BUS_TI_SCI_INTA_MSI);
63 EXPORT_SYMBOL_GPL(ti_sci_inta_msi_create_irq_domain);
65 static int ti_sci_inta_msi_alloc_descs(struct device *dev,
66 struct ti_sci_resource *res)
68 struct msi_desc msi_desc;
69 int set, i, count = 0;
71 memset(&msi_desc, 0, sizeof(msi_desc));
72 msi_desc.nvec_used = 1;
74 for (set = 0; set < res->sets; set++) {
75 for (i = 0; i < res->desc[set].num; i++, count++) {
76 msi_desc.msi_index = res->desc[set].start + i;
77 if (msi_insert_msi_desc(dev, &msi_desc))
81 for (i = 0; i < res->desc[set].num_sec; i++, count++) {
82 msi_desc.msi_index = res->desc[set].start_sec + i;
83 if (msi_insert_msi_desc(dev, &msi_desc))
89 msi_free_msi_descs(dev);
93 int ti_sci_inta_msi_domain_alloc_irqs(struct device *dev,
94 struct ti_sci_resource *res)
96 struct platform_device *pdev = to_platform_device(dev);
102 ret = msi_setup_device_data(dev);
107 nvec = ti_sci_inta_msi_alloc_descs(dev, res);
113 /* Use alloc ALL as it's unclear whether there are gaps in the indices */
114 ret = msi_domain_alloc_irqs_all_locked(dev, MSI_DEFAULT_DOMAIN, nvec);
116 dev_err(dev, "Failed to allocate IRQs %d\n", ret);
118 msi_unlock_descs(dev);
121 EXPORT_SYMBOL_GPL(ti_sci_inta_msi_domain_alloc_irqs);