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Commit f011df61 authored by Lokesh Vutla's avatar Lokesh Vutla Committed by Marc Zyngier
Browse files

irqchip/ti-sci-inta: Add msi domain support 



Add a msi domain that is child to the INTA domain. Clients
uses the INTA MSI bus layer to allocate irqs in this
MSI domain.

Signed-off-by: default avatarLokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
parent 49b32315

drivers/irqchip/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -433,6 +433,7 @@ config TI_SCI_INTA_IRQCHIP 
	bool

	depends on TI_SCI_PROTOCOL

	select IRQ_DOMAIN_HIERARCHY

	select TI_SCI_INTA_MSI_DOMAIN

	help

	  This enables the irqchip driver support for K3 Interrupt aggregator

	  over TI System Control Interface available on some new TI's SoCs.

drivers/irqchip/irq-ti-sci-inta.c

+39 −1
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ 
#include <linux/of_irq.h>

#include <linux/of_platform.h>

#include <linux/irqchip/chained_irq.h>

#include <linux/soc/ti/ti_sci_inta_msi.h>

#include <linux/soc/ti/ti_sci_protocol.h>

#include <asm-generic/msi.h>
@@ -28,6 +29,9 @@ 
#define HWIRQ_TO_DEVID(hwirq)	(((hwirq) >> (TI_SCI_DEV_ID_SHIFT)) & \

				 (TI_SCI_DEV_ID_MASK))

#define HWIRQ_TO_IRQID(hwirq)	((hwirq) & (TI_SCI_IRQ_ID_MASK))

#define TO_HWIRQ(dev, index)	((((dev) & TI_SCI_DEV_ID_MASK) << \

				 TI_SCI_DEV_ID_SHIFT) | \

				((index) & TI_SCI_IRQ_ID_MASK))



#define MAX_EVENTS_PER_VINT	64

#define VINT_ENABLE_SET_OFFSET	0x0
@@ -484,9 +488,34 @@ static const struct irq_domain_ops ti_sci_inta_irq_domain_ops = { 
	.alloc		= ti_sci_inta_irq_domain_alloc,

};



static struct irq_chip ti_sci_inta_msi_irq_chip = {

	.name			= "MSI-INTA",

	.flags			= IRQCHIP_SUPPORTS_LEVEL_MSI,

};



static void ti_sci_inta_msi_set_desc(msi_alloc_info_t *arg,

				     struct msi_desc *desc)

{

	struct platform_device *pdev = to_platform_device(desc->dev);



	arg->desc = desc;

	arg->hwirq = TO_HWIRQ(pdev->id, desc->inta.dev_index);

}



static struct msi_domain_ops ti_sci_inta_msi_ops = {

	.set_desc	= ti_sci_inta_msi_set_desc,

};



static struct msi_domain_info ti_sci_inta_msi_domain_info = {

	.flags	= (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |

		   MSI_FLAG_LEVEL_CAPABLE),

	.ops	= &ti_sci_inta_msi_ops,

	.chip	= &ti_sci_inta_msi_irq_chip,

};



static int ti_sci_inta_irq_domain_probe(struct platform_device *pdev)

{

	struct irq_domain *parent_domain, *domain;

	struct irq_domain *parent_domain, *domain, *msi_domain;

	struct device_node *parent_node, *node;

	struct ti_sci_inta_irq_domain *inta;

	struct device *dev = &pdev->dev;
@@ -551,6 +580,15 @@ static int ti_sci_inta_irq_domain_probe(struct platform_device *pdev) 
		return -ENOMEM;

	}



	msi_domain = ti_sci_inta_msi_create_irq_domain(of_node_to_fwnode(node),

						&ti_sci_inta_msi_domain_info,

						domain);

	if (!msi_domain) {

		irq_domain_remove(domain);

		dev_err(dev, "Failed to allocate msi domain\n");

		return -ENOMEM;

	}



	INIT_LIST_HEAD(&inta->vint_list);

	mutex_init(&inta->vint_mutex);