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

	bool

	depends on TI_SCI_PROTOCOL

	depends on TI_SCI_PROTOCOL

	select IRQ_DOMAIN_HIERARCHY

	select IRQ_DOMAIN_HIERARCHY

	select TI_SCI_INTA_MSI_DOMAIN

	help

	help

	  This enables the irqchip driver support for K3 Interrupt aggregator

	  This enables the irqchip driver support for K3 Interrupt aggregator

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

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

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

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

#include <linux/of_irq.h>

#include <linux/of_platform.h>

#include <linux/of_platform.h>

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

#include <asm-generic/msi.h>

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

#define HWIRQ_TO_DEVID(hwirq)	(((hwirq) >> (TI_SCI_DEV_ID_SHIFT)) & \

				 (TI_SCI_DEV_ID_MASK))

				 (TI_SCI_DEV_ID_MASK))

#define HWIRQ_TO_IRQID(hwirq)	((hwirq) & (TI_SCI_IRQ_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 MAX_EVENTS_PER_VINT	64

#define VINT_ENABLE_SET_OFFSET	0x0

#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,

	.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)

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 device_node *parent_node, *node;

	struct ti_sci_inta_irq_domain *inta;

	struct ti_sci_inta_irq_domain *inta;

	struct device *dev = &pdev->dev;

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

		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);

	INIT_LIST_HEAD(&inta->vint_list);

	mutex_init(&inta->vint_mutex);

	mutex_init(&inta->vint_mutex);