[tip: irq/msi] irqchip/mvebu-gicp: Switch to MSI parent

[tip-bot2 for Thomas Gleixner]

The following commit has been merged into the irq/msi branch of tip:

Commit-ID:     cdb238723018eb766040d7be5d879b4c81ad3d50
Gitweb:        https://git.kernel.org/tip/cdb238723018eb766040d7be5d879b4c81ad3d50
Author:        Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate:    Sun, 23 Jun 2024 17:18:58 +02:00
Committer:     Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitterDate: Thu, 18 Jul 2024 20:31:20 +02:00

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: 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/20240623142235.699780279@xxxxxxxxxxxxx



---
 drivers/irqchip/Kconfig          |  1 +-
 drivers/irqchip/irq-mvebu-gicp.c | 44 +++++++++++++------------------
 2 files changed, 20 insertions(+), 25 deletions(-)

diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
index e7a57b3..a0fa599 100644
--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
@@ -371,6 +371,7 @@ config MSCC_OCELOT_IRQ
 	select GENERIC_IRQ_CHIP
 
 config MVEBU_GICP
+	select IRQ_MSI_LIB
 	bool
 
 config MVEBU_ICU
diff --git a/drivers/irqchip/irq-mvebu-gicp.c b/drivers/irqchip/irq-mvebu-gicp.c
index c43a345..2b61839 100644
--- a/drivers/irqchip/irq-mvebu-gicp.c
+++ b/drivers/irqchip/irq-mvebu-gicp.c
@@ -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;
 }