3  * ACPI GSI IRQ layer
9 #include <linux/irq.h>
19  * acpi_gsi_to_irq() - Retrieve the linux irq number for a given GSI
20  * @gsi: GSI IRQ number to map
21  * @irq: pointer where linux IRQ number is stored
23  * irq location updated with irq value [>0 on success, 0 on failure]
28 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)  in acpi_gsi_to_irq()  argument
34 	*irq = irq_find_mapping(d, gsi);  in acpi_gsi_to_irq()
36 	 * *irq == 0 means no mapping, that should be reported as a  in acpi_gsi_to_irq()
39 	if (!*irq && acpi_gsi_to_irq_fallback)  in acpi_gsi_to_irq()
40 		*irq = acpi_gsi_to_irq_fallback(gsi);  in acpi_gsi_to_irq()
42 	return (*irq > 0) ? 0 : -EINVAL;  in acpi_gsi_to_irq()
47  * acpi_register_gsi() - Map a GSI to a linux IRQ number
48  * @dev: device for which IRQ has to be mapped
49  * @gsi: GSI IRQ number
53  * Returns: a valid linux IRQ number on success
60 	unsigned int irq;  in acpi_register_gsi()  local
72 	irq = irq_create_fwspec_mapping(&fwspec);  in acpi_register_gsi()
73 	if (!irq)  in acpi_register_gsi()
76 	return irq;  in acpi_register_gsi()
81  * acpi_unregister_gsi() - Free a GSI<->linux IRQ number mapping
82  * @gsi: GSI IRQ number
87 	int irq;  in acpi_unregister_gsi()  local
94 	irq = irq_find_mapping(d, gsi);  in acpi_unregister_gsi()
95 	irq_dispose_mapping(irq);  in acpi_unregister_gsi()
100  * acpi_get_irq_source_fwhandle() - Retrieve fwhandle from IRQ resource source.
102  * @gsi: GSI IRQ number
105  * Retrieve the fwhandle of the device referenced by the given IRQ resource
137  * Context for the resource walk used to lookup IRQ resources.
149  * acpi_irq_parse_one_match - Handle a matching IRQ resource.
151  * @hwirq: hardware IRQ number
160  * Handle a matching IRQ resource by populating the given ctx with
186  * the _CRS method. We only inspect IRQ resources. Since IRQ resources
188  * one's interrupt array, otherwise we subtract the current resource IRQ
195  * IRQ resource was found.
201 	struct acpi_resource_irq *irq;  in acpi_irq_parse_one_cb()  local
207 		irq = &ares->data.irq;  in acpi_irq_parse_one_cb()
208 		if (ctx->index >= irq->interrupt_count) {  in acpi_irq_parse_one_cb()
209 			ctx->index -= irq->interrupt_count;  in acpi_irq_parse_one_cb()
212 		fwnode = acpi_get_gsi_domain_id(irq->interrupts[ctx->index]);  in acpi_irq_parse_one_cb()
213 		acpi_irq_parse_one_match(fwnode, irq->interrupts[ctx->index],  in acpi_irq_parse_one_cb()
214 					 irq->triggering, irq->polarity,  in acpi_irq_parse_one_cb()
215 					 irq->shareable, irq->wake_capable, ctx);  in acpi_irq_parse_one_cb()
245  * the appropriate ACPI IRQ resource and populating the given struct irq_fwspec
262  * acpi_irq_get - Lookup an ACPI IRQ resource and use it to initialize resource.
264  * @index:  ACPI IRQ resource index to lookup
265  * @res:    Linux IRQ resource to initialize
268  * Look for the ACPI IRQ resource with the given index and use it to initialize
269  * the given Linux IRQ resource.
274  * -EPROBE_DEFER if the IRQ lookup/conversion failed
327  * acpi_irq_create_hierarchy - Create a hierarchical IRQ domain with the default
329  * @flags:      Irq domain flags associated with the domain