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9#include <linux/irq.h>
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>
17
18static void ti_sci_inta_msi_write_msg(struct irq_data *data,
19 struct msi_msg *msg)
20{
21
22}
23
24static void ti_sci_inta_msi_compose_msi_msg(struct irq_data *data,
25 struct msi_msg *msg)
26{
27
28}
29
30static void ti_sci_inta_msi_update_chip_ops(struct msi_domain_info *info)
31{
32 struct irq_chip *chip = info->chip;
33
34 if (WARN_ON(!chip))
35 return;
36
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;
45}
46
47struct irq_domain *ti_sci_inta_msi_create_irq_domain(struct fwnode_handle *fwnode,
48 struct msi_domain_info *info,
49 struct irq_domain *parent)
50{
51 struct irq_domain *domain;
52
53 ti_sci_inta_msi_update_chip_ops(info);
54
55 domain = msi_create_irq_domain(fwnode, info, parent);
56 if (domain)
57 irq_domain_update_bus_token(domain, DOMAIN_BUS_TI_SCI_INTA_MSI);
58
59 return domain;
60}
61EXPORT_SYMBOL_GPL(ti_sci_inta_msi_create_irq_domain);
62
63static void ti_sci_inta_msi_free_descs(struct device *dev)
64{
65 struct msi_desc *desc, *tmp;
66
67 list_for_each_entry_safe(desc, tmp, dev_to_msi_list(dev), list) {
68 list_del(&desc->list);
69 free_msi_entry(desc);
70 }
71}
72
73static int ti_sci_inta_msi_alloc_descs(struct device *dev,
74 struct ti_sci_resource *res)
75{
76 struct msi_desc *msi_desc;
77 int set, i, count = 0;
78
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);
82 if (!msi_desc) {
83 ti_sci_inta_msi_free_descs(dev);
84 return -ENOMEM;
85 }
86
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));
90 count++;
91 }
92 for (i = 0; i < res->desc[set].num_sec; i++) {
93 msi_desc = alloc_msi_entry(dev, 1, NULL);
94 if (!msi_desc) {
95 ti_sci_inta_msi_free_descs(dev);
96 return -ENOMEM;
97 }
98
99 msi_desc->inta.dev_index = res->desc[set].start_sec + i;
100 INIT_LIST_HEAD(&msi_desc->list);
101 list_add_tail(&msi_desc->list, dev_to_msi_list(dev));
102 count++;
103 }
104 }
105
106 return count;
107}
108
109int ti_sci_inta_msi_domain_alloc_irqs(struct device *dev,
110 struct ti_sci_resource *res)
111{
112 struct platform_device *pdev = to_platform_device(dev);
113 struct irq_domain *msi_domain;
114 int ret, nvec;
115
116 msi_domain = dev_get_msi_domain(dev);
117 if (!msi_domain)
118 return -EINVAL;
119
120 if (pdev->id < 0)
121 return -ENODEV;
122
123 nvec = ti_sci_inta_msi_alloc_descs(dev, res);
124 if (nvec <= 0)
125 return nvec;
126
127 ret = msi_domain_alloc_irqs(msi_domain, dev, nvec);
128 if (ret) {
129 dev_err(dev, "Failed to allocate IRQs %d\n", ret);
130 goto cleanup;
131 }
132
133 return 0;
134
135cleanup:
136 ti_sci_inta_msi_free_descs(&pdev->dev);
137 return ret;
138}
139EXPORT_SYMBOL_GPL(ti_sci_inta_msi_domain_alloc_irqs);
140
141void ti_sci_inta_msi_domain_free_irqs(struct device *dev)
142{
143 msi_domain_free_irqs(dev->msi_domain, dev);
144 ti_sci_inta_msi_free_descs(dev);
145}
146EXPORT_SYMBOL_GPL(ti_sci_inta_msi_domain_free_irqs);
147
148unsigned int ti_sci_inta_msi_get_virq(struct device *dev, u32 dev_index)
149{
150 struct msi_desc *desc;
151
152 for_each_msi_entry(desc, dev)
153 if (desc->inta.dev_index == dev_index)
154 return desc->irq;
155
156 return -ENODEV;
157}
158EXPORT_SYMBOL_GPL(ti_sci_inta_msi_get_virq);
159
