diff mbox series

[v12,13/25] genirq/msi: Provide MSI_FLAG_PARENT_PM_DEV

Message ID 20240127161753.114685-14-apatel@ventanamicro.com (mailing list archive)
State Superseded
Headers show
Series Linux RISC-V AIA Support | expand

Checks

Context Check Description
conchuod/vmtest-for-next-PR success PR summary
conchuod/patch-13-test-1 success .github/scripts/patches/tests/build_rv32_defconfig.sh
conchuod/patch-13-test-2 success .github/scripts/patches/tests/build_rv64_clang_allmodconfig.sh
conchuod/patch-13-test-3 success .github/scripts/patches/tests/build_rv64_gcc_allmodconfig.sh
conchuod/patch-13-test-4 success .github/scripts/patches/tests/build_rv64_nommu_k210_defconfig.sh
conchuod/patch-13-test-5 success .github/scripts/patches/tests/build_rv64_nommu_virt_defconfig.sh
conchuod/patch-13-test-6 success .github/scripts/patches/tests/checkpatch.sh
conchuod/patch-13-test-7 success .github/scripts/patches/tests/dtb_warn_rv64.sh
conchuod/patch-13-test-8 success .github/scripts/patches/tests/header_inline.sh
conchuod/patch-13-test-9 success .github/scripts/patches/tests/kdoc.sh
conchuod/patch-13-test-10 success .github/scripts/patches/tests/module_param.sh
conchuod/patch-13-test-11 success .github/scripts/patches/tests/verify_fixes.sh
conchuod/patch-13-test-12 success .github/scripts/patches/tests/verify_signedoff.sh

Commit Message

Anup Patel Jan. 27, 2024, 4:17 p.m. UTC 
From: Thomas Gleixner <tglx@linutronix.de>

Some platform-MSI implementations require that power management is
redirected to the underlying interrupt chip device. To make this work
with per device MSI domains provide a new feature flag and let the
core code handle the setup of dev->pm_dev when set during device MSI
domain creation.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
---
 include/linux/msi.h | 2 ++
 kernel/irq/msi.c    | 5 ++++-
 2 files changed, 6 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/include/linux/msi.h b/include/linux/msi.h
index ac73f678da7d..b21581ca8e9a 100644
--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -554,6 +554,8 @@  enum {
 	MSI_FLAG_FREE_MSI_DESCS		= (1 << 6),
 	/* Use dev->fwnode for MSI device domain creation */
 	MSI_FLAG_USE_DEV_FWNODE		= (1 << 7),
+	/* Set parent->dev into domain->pm_dev on device domain creation */
+	MSI_FLAG_PARENT_PM_DEV		= (1 << 8),
 
 	/* Mask for the generic functionality */
 	MSI_GENERIC_FLAGS_MASK		= GENMASK(15, 0),
diff --git a/kernel/irq/msi.c b/kernel/irq/msi.c
index 07e9daaf0657..f90952ebc494 100644
--- a/kernel/irq/msi.c
+++ b/kernel/irq/msi.c
@@ -845,8 +845,11 @@  static struct irq_domain *__msi_create_irq_domain(struct fwnode_handle *fwnode,
 	domain = irq_domain_create_hierarchy(parent, flags | IRQ_DOMAIN_FLAG_MSI, 0,
 					     fwnode, &msi_domain_ops, info);
 
-	if (domain)
+	if (domain) {
 		irq_domain_update_bus_token(domain, info->bus_token);
+		if (info->flags & MSI_FLAG_PARENT_PM_DEV)
+			domain->pm_dev = parent->pm_dev;
+	}
 
 	return domain;
 }