diff mbox series

[v2,02/11] irqchip/irq-msi-lib: Optionally set default irq_eoi/irq_ack

Message ID 20241214172549.8842-3-apatel@ventanamicro.com (mailing list archive)
State New
Headers show
Series RISC-V IMSIC driver improvements | expand

Commit Message

Anup Patel Dec. 14, 2024, 5:25 p.m. UTC 
From: Thomas Gleixner <tglx@linutronix.de>

Introduce chip_flags in struct msi_parent_ops. This allows
msi_lib_init_dev_msi_info() set default irq_eoi/irq_ack
callbacks only when the corresponding flags are set in
the chip_flags.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
---
 drivers/irqchip/irq-gic-v2m.c    |  1 +
 drivers/irqchip/irq-imx-mu-msi.c |  1 +
 drivers/irqchip/irq-msi-lib.c    | 11 ++++++-----
 drivers/irqchip/irq-mvebu-gicp.c |  1 +
 drivers/irqchip/irq-mvebu-odmi.c |  1 +
 drivers/irqchip/irq-mvebu-sei.c  |  1 +
 include/linux/msi.h              | 11 +++++++++++
 7 files changed, 22 insertions(+), 5 deletions(-)
diff mbox series

Patch

diff --git a/drivers/irqchip/irq-gic-v2m.c b/drivers/irqchip/irq-gic-v2m.c
index be35c5349986..1e3476c335ca 100644
--- a/drivers/irqchip/irq-gic-v2m.c
+++ b/drivers/irqchip/irq-gic-v2m.c
@@ -255,6 +255,7 @@  static void __init gicv2m_teardown(void)
 static struct msi_parent_ops gicv2m_msi_parent_ops = {
 	.supported_flags	= GICV2M_MSI_FLAGS_SUPPORTED,
 	.required_flags		= GICV2M_MSI_FLAGS_REQUIRED,
+	.chip_flags		= MSI_CHIP_FLAG_SET_EOI | MSI_CHIP_FLAG_SET_ACK,
 	.bus_select_token	= DOMAIN_BUS_NEXUS,
 	.bus_select_mask	= MATCH_PCI_MSI | MATCH_PLATFORM_MSI,
 	.prefix			= "GICv2m-",
diff --git a/drivers/irqchip/irq-imx-mu-msi.c b/drivers/irqchip/irq-imx-mu-msi.c
index 4342a21de1eb..69aacdfc8bef 100644
--- a/drivers/irqchip/irq-imx-mu-msi.c
+++ b/drivers/irqchip/irq-imx-mu-msi.c
@@ -214,6 +214,7 @@  static void imx_mu_msi_irq_handler(struct irq_desc *desc)
 static const struct msi_parent_ops imx_mu_msi_parent_ops = {
 	.supported_flags	= IMX_MU_MSI_FLAGS_SUPPORTED,
 	.required_flags		= IMX_MU_MSI_FLAGS_REQUIRED,
+	.chip_flags		= MSI_CHIP_FLAG_SET_EOI | MSI_CHIP_FLAG_SET_ACK,
 	.bus_select_token       = DOMAIN_BUS_NEXUS,
 	.bus_select_mask	= MATCH_PLATFORM_MSI,
 	.prefix			= "MU-MSI-",
diff --git a/drivers/irqchip/irq-msi-lib.c b/drivers/irqchip/irq-msi-lib.c
index d8e29fc0d406..51464c6257f3 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;
+	struct irq_chip *chip = info->chip;
 	u32 required_flags;
 
 	/* Parent ops available? */
@@ -92,10 +93,10 @@  bool msi_lib_init_dev_msi_info(struct device *dev, struct irq_domain *domain,
 	info->flags			|= required_flags;
 
 	/* Chip updates for all child bus types */
-	if (!info->chip->irq_eoi)
-		info->chip->irq_eoi	= irq_chip_eoi_parent;
-	if (!info->chip->irq_ack)
-		info->chip->irq_ack	= irq_chip_ack_parent;
+	if (!chip->irq_eoi && (pops->chip_flags & MSI_CHIP_FLAG_SET_EOI))
+		chip->irq_eoi = irq_chip_eoi_parent;
+	if (!chip->irq_ack && (pops->chip_flags & MSI_CHIP_FLAG_SET_ACK))
+		chip->irq_ack = irq_chip_ack_parent;
 
 	/*
 	 * The device MSI domain can never have a set affinity callback. It
@@ -105,7 +106,7 @@  bool msi_lib_init_dev_msi_info(struct device *dev, struct irq_domain *domain,
 	 * device MSI domain aside of mask/unmask which is provided e.g. by
 	 * PCI/MSI device domains.
 	 */
-	info->chip->irq_set_affinity	= msi_domain_set_affinity;
+	chip->irq_set_affinity = msi_domain_set_affinity;
 	return true;
 }
 EXPORT_SYMBOL_GPL(msi_lib_init_dev_msi_info);
diff --git a/drivers/irqchip/irq-mvebu-gicp.c b/drivers/irqchip/irq-mvebu-gicp.c
index 2b6183919ea4..d67f93f6d750 100644
--- a/drivers/irqchip/irq-mvebu-gicp.c
+++ b/drivers/irqchip/irq-mvebu-gicp.c
@@ -161,6 +161,7 @@  static const struct irq_domain_ops gicp_domain_ops = {
 static const struct msi_parent_ops gicp_msi_parent_ops = {
 	.supported_flags	= GICP_MSI_FLAGS_SUPPORTED,
 	.required_flags		= GICP_MSI_FLAGS_REQUIRED,
+	.chip_flags		= MSI_CHIP_FLAG_SET_EOI | MSI_CHIP_FLAG_SET_ACK,
 	.bus_select_token       = DOMAIN_BUS_GENERIC_MSI,
 	.bus_select_mask	= MATCH_PLATFORM_MSI,
 	.prefix			= "GICP-",
diff --git a/drivers/irqchip/irq-mvebu-odmi.c b/drivers/irqchip/irq-mvebu-odmi.c
index ff19bfd258dc..28f7e81df94f 100644
--- a/drivers/irqchip/irq-mvebu-odmi.c
+++ b/drivers/irqchip/irq-mvebu-odmi.c
@@ -157,6 +157,7 @@  static const struct irq_domain_ops odmi_domain_ops = {
 static const struct msi_parent_ops odmi_msi_parent_ops = {
 	.supported_flags	= ODMI_MSI_FLAGS_SUPPORTED,
 	.required_flags		= ODMI_MSI_FLAGS_REQUIRED,
+	.chip_flags		= MSI_CHIP_FLAG_SET_EOI | MSI_CHIP_FLAG_SET_ACK,
 	.bus_select_token	= DOMAIN_BUS_GENERIC_MSI,
 	.bus_select_mask	= MATCH_PLATFORM_MSI,
 	.prefix			= "ODMI-",
diff --git a/drivers/irqchip/irq-mvebu-sei.c b/drivers/irqchip/irq-mvebu-sei.c
index 065166ab5dbc..ebd4a9014e8d 100644
--- a/drivers/irqchip/irq-mvebu-sei.c
+++ b/drivers/irqchip/irq-mvebu-sei.c
@@ -356,6 +356,7 @@  static void mvebu_sei_reset(struct mvebu_sei *sei)
 static const struct msi_parent_ops sei_msi_parent_ops = {
 	.supported_flags	= SEI_MSI_FLAGS_SUPPORTED,
 	.required_flags		= SEI_MSI_FLAGS_REQUIRED,
+	.chip_flags		= MSI_CHIP_FLAG_SET_EOI | MSI_CHIP_FLAG_SET_ACK,
 	.bus_select_mask	= MATCH_PLATFORM_MSI,
 	.bus_select_token	= DOMAIN_BUS_GENERIC_MSI,
 	.prefix			= "SEI-",
diff --git a/include/linux/msi.h b/include/linux/msi.h
index b10093c4d00e..9abef442c146 100644
--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -558,11 +558,21 @@  enum {
 	MSI_FLAG_NO_AFFINITY		= (1 << 21),
 };
 
+/*
+ * Flags for msi_parent_ops::chip_flags
+ */
+enum {
+	MSI_CHIP_FLAG_SET_EOI		= (1 << 0),
+	MSI_CHIP_FLAG_SET_ACK		= (1 << 1),
+};
+
 /**
  * struct msi_parent_ops - MSI parent domain callbacks and configuration info
  *
  * @supported_flags:	Required: The supported MSI flags of the parent domain
  * @required_flags:	Optional: The required MSI flags of the parent MSI domain
+ * @chip_flags:		Optional: Select MSI chip callbacks to update with defaults
+ *			in msi_lib_init_dev_msi_info().
  * @bus_select_token:	Optional: The bus token of the real parent domain for
  *			irq_domain::select()
  * @bus_select_mask:	Optional: A mask of supported BUS_DOMAINs for
@@ -575,6 +585,7 @@  enum {
 struct msi_parent_ops {
 	u32		supported_flags;
 	u32		required_flags;
+	u32		chip_flags;
 	u32		bus_select_token;
 	u32		bus_select_mask;
 	const char	*prefix;