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);
54 info->flags |= MSI_FLAG_FREE_MSI_DESCS;
56 domain = msi_create_irq_domain(fwnode, info, parent);
58 irq_domain_update_bus_token(domain, DOMAIN_BUS_TI_SCI_INTA_MSI);
62 EXPORT_SYMBOL_GPL(ti_sci_inta_msi_create_irq_domain);
64 static int ti_sci_inta_msi_alloc_descs(struct device *dev,
65 struct ti_sci_resource *res)
67 struct msi_desc msi_desc;
68 int set, i, count = 0;
70 memset(&msi_desc, 0, sizeof(msi_desc));
71 msi_desc.nvec_used = 1;
73 for (set = 0; set < res->sets; set++) {
74 for (i = 0; i < res->desc[set].num; i++, count++) {
75 msi_desc.msi_index = res->desc[set].start + i;
76 if (msi_add_msi_desc(dev, &msi_desc))
80 for (i = 0; i < res->desc[set].num_sec; i++, count++) {
81 msi_desc.msi_index = res->desc[set].start_sec + i;
82 if (msi_add_msi_desc(dev, &msi_desc))
88 msi_free_msi_descs(dev);
92 int ti_sci_inta_msi_domain_alloc_irqs(struct device *dev,
93 struct ti_sci_resource *res)
95 struct platform_device *pdev = to_platform_device(dev);
96 struct irq_domain *msi_domain;
99 msi_domain = dev_get_msi_domain(dev);
106 ret = msi_setup_device_data(dev);
111 nvec = ti_sci_inta_msi_alloc_descs(dev, res);
117 ret = msi_domain_alloc_irqs_descs_locked(msi_domain, dev, nvec);
119 dev_err(dev, "Failed to allocate IRQs %d\n", ret);
121 msi_unlock_descs(dev);
124 EXPORT_SYMBOL_GPL(ti_sci_inta_msi_domain_alloc_irqs);