Commit cdb23872 authored by Thomas Gleixner's avatar Thomas Gleixner
Browse files

irqchip/mvebu-gicp: Switch to MSI parent 



All platform MSI users and the PCI/MSI code handle per device MSI domains
when the irqdomain associated to the device provides MSI parent
functionality.

Remove the "global" platform domain related code and provide the MSI parent
functionality by filling in msi_parent_ops.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarAnna-Maria Behnsen <anna-maria@linutronix.de>
Signed-off-by: default avatarShivamurthy Shastri <shivamurthy.shastri@linutronix.de>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20240623142235.699780279@linutronix.de
parent d929e4db

drivers/irqchip/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -371,6 +371,7 @@ config MSCC_OCELOT_IRQ 
	select GENERIC_IRQ_CHIP



config MVEBU_GICP

	select IRQ_MSI_LIB

	bool



config MVEBU_ICU

drivers/irqchip/irq-mvebu-gicp.c

+19 −25
Original line number Diff line number Diff line
@@ -17,6 +17,8 @@ 
#include <linux/of_platform.h>

#include <linux/platform_device.h>



#include "irq-msi-lib.h"



#include <dt-bindings/interrupt-controller/arm-gic.h>



#define GICP_SETSPI_NSR_OFFSET	0x0
@@ -145,32 +147,32 @@ static void gicp_irq_domain_free(struct irq_domain *domain, 
}



static const struct irq_domain_ops gicp_domain_ops = {

	.select	= msi_lib_irq_domain_select,

	.alloc	= gicp_irq_domain_alloc,

	.free	= gicp_irq_domain_free,

};



static struct irq_chip gicp_msi_irq_chip = {

	.name		= "GICP",

	.irq_set_type	= irq_chip_set_type_parent,

	.flags		= IRQCHIP_SUPPORTS_LEVEL_MSI,

};

#define GICP_MSI_FLAGS_REQUIRED  (MSI_FLAG_USE_DEF_DOM_OPS |	\

				  MSI_FLAG_USE_DEF_CHIP_OPS)



static struct msi_domain_ops gicp_msi_ops = {

};

#define GICP_MSI_FLAGS_SUPPORTED (MSI_GENERIC_FLAGS_MASK |	\

				  MSI_FLAG_LEVEL_CAPABLE)



static struct msi_domain_info gicp_msi_domain_info = {

	.flags	= (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |

		   MSI_FLAG_LEVEL_CAPABLE),

	.ops	= &gicp_msi_ops,

	.chip	= &gicp_msi_irq_chip,

static const struct msi_parent_ops gicp_msi_parent_ops = {

	.supported_flags	= GICP_MSI_FLAGS_SUPPORTED,

	.required_flags		= GICP_MSI_FLAGS_REQUIRED,

	.bus_select_token       = DOMAIN_BUS_GENERIC_MSI,

	.bus_select_mask	= MATCH_PLATFORM_MSI,

	.prefix			= "GICP-",

	.init_dev_msi_info	= msi_lib_init_dev_msi_info,

};



static int mvebu_gicp_probe(struct platform_device *pdev)

{

	struct mvebu_gicp *gicp;

	struct irq_domain *inner_domain, *plat_domain, *parent_domain;

	struct irq_domain *inner_domain, *parent_domain;

	struct device_node *node = pdev->dev.of_node;

	struct device_node *irq_parent_dn;

	struct mvebu_gicp *gicp;

	int ret, i;



	gicp = devm_kzalloc(&pdev->dev, sizeof(*gicp), GFP_KERNEL);
@@ -234,17 +236,9 @@ static int mvebu_gicp_probe(struct platform_device *pdev) 
	if (!inner_domain)

		return -ENOMEM;





	plat_domain = platform_msi_create_irq_domain(of_node_to_fwnode(node),

						     &gicp_msi_domain_info,

						     inner_domain);

	if (!plat_domain) {

		irq_domain_remove(inner_domain);

		return -ENOMEM;

	}



	platform_set_drvdata(pdev, gicp);



	irq_domain_update_bus_token(inner_domain, DOMAIN_BUS_GENERIC_MSI);

	inner_domain->flags |= IRQ_DOMAIN_FLAG_MSI_PARENT;

	inner_domain->msi_parent_ops = &gicp_msi_parent_ops;

	return 0;

}