The following commit has been merged into the irq/msi branch of tip:
Commit-ID: 8c41ccec839c622b2d1be769a95405e4e9a4cb20
Gitweb: https://git.kernel.org/tip/8c41ccec839c622b2d1be769a95405e4e9a4cb20
Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate: Sun, 23 Jun 2024 17:18:38 +02:00
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitterDate: Thu, 18 Jul 2024 20:31:19 +02:00
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: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Anna-Maria Behnsen <anna-maria@xxxxxxxxxxxxx>
Signed-off-by: Shivamurthy Shastri <shivamurthy.shastri@xxxxxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20240623142234.964056815@xxxxxxxxxxxxx
---
drivers/irqchip/irq-msi-lib.c | 11 ++++++++++-
drivers/irqchip/irq-msi-lib.h | 6 ++++++
2 files changed, 16 insertions(+), 1 deletion(-)
diff --git a/drivers/irqchip/irq-msi-lib.c b/drivers/irqchip/irq-msi-lib.c
index ec1a10f..ef26962 100644
--- a/drivers/irqchip/irq-msi-lib.c
+++ b/drivers/irqchip/irq-msi-lib.c
@@ -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)
diff --git a/drivers/irqchip/irq-msi-lib.h b/drivers/irqchip/irq-msi-lib.h
index f0706cc..525aa52 100644
--- a/drivers/irqchip/irq-msi-lib.h
+++ b/drivers/irqchip/irq-msi-lib.h
@@ -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);
|