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

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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: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Anna-Maria Behnsen <anna-maria@linutronix.de>
Signed-off-by: Shivamurthy Shastri <shivamurthy.shastri@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20240623142234.964056815@linutronix.de
This commit is contained in:
Thomas Gleixner
2024-06-23 17:18:38 +02:00
parent 48f71d56e2
commit 8c41ccec83
2 changed files with 16 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/irqchip/irq-msi-lib.c
View File

@@ -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)

6
drivers/irqchip/irq-msi-lib.h
View File

@@ -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);