Commit 8c41ccec authored by Thomas Gleixner's avatar Thomas Gleixner
Browse files

irqchip/irq-msi-lib: Prepare for PCI MSI/MSIX 



Add the bus tokens for DOMAIN_BUS_PCI_DEVICE_MSI and
DOMAIN_BUS_PCI_DEVICE_MSIX to the common child init
function.

Provide the match mask which can be used by parent domain
implementation so the bitmask based child bus token match
works.

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/20240623142234.964056815@linutronix.de
parent 48f71d56

drivers/irqchip/irq-msi-lib.c

+10 −1
Original line number Diff line number Diff line
@@ -28,6 +28,7 @@ bool msi_lib_init_dev_msi_info(struct device *dev, struct irq_domain *domain, 
			       struct msi_domain_info *info)

{

	const struct msi_parent_ops *pops = real_parent->msi_parent_ops;

	u32 required_flags;



	/* Parent ops available? */

	if (WARN_ON_ONCE(!pops))
@@ -46,8 +47,16 @@ bool msi_lib_init_dev_msi_info(struct device *dev, struct irq_domain *domain, 
		return false;

	}



	required_flags = pops->required_flags;



	/* Is the target domain bus token supported? */

	switch(info->bus_token) {

	case DOMAIN_BUS_PCI_DEVICE_MSI:

	case DOMAIN_BUS_PCI_DEVICE_MSIX:

		if (WARN_ON_ONCE(!IS_ENABLED(CONFIG_PCI_MSI)))

			return false;



		break;

	default:

		/*

		 * This should never be reached. See
@@ -63,7 +72,7 @@ bool msi_lib_init_dev_msi_info(struct device *dev, struct irq_domain *domain, 
	 */

	info->flags			&= pops->supported_flags;

	/* Enforce the required flags */

	info->flags			|= pops->required_flags;

	info->flags			|= required_flags;



	/* Chip updates for all child bus types */

	if (!info->chip->irq_eoi)

drivers/irqchip/irq-msi-lib.h

+6 −0
Original line number Diff line number Diff line
@@ -9,6 +9,12 @@ 
#include <linux/irqdomain.h>

#include <linux/msi.h>



#ifdef CONFIG_PCI_MSI

#define MATCH_PCI_MSI		BIT(DOMAIN_BUS_PCI_MSI)

#else

#define MATCH_PCI_MSI		(0)

#endif



int msi_lib_irq_domain_select(struct irq_domain *d, struct irq_fwspec *fwspec,

			      enum irq_domain_bus_token bus_token);