diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2024-01-27 19:17:41 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2024-02-15 19:55:41 +0300 |
| commit | 9bbe13a5d414a7f8208dba64b54d2b6e4f7086bd (patch) | |
| tree | 0f276d9ba7b3a8cdb606a82601fe30f7d3b63a52 | |
| parent | e49312fe09df36cc4eae0cd6e1b08b563a91e1bc (diff) | |
| download | linux-9bbe13a5d414a7f8208dba64b54d2b6e4f7086bd.tar.xz | |
genirq/msi: Provide MSI_FLAG_PARENT_PM_DEV
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>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20240127161753.114685-14-apatel@ventanamicro.com
| -rw-r--r-- | include/linux/msi.h | 2 | ||||
| -rw-r--r-- | kernel/irq/msi.c | 5 |
2 files changed, 6 insertions, 1 deletions
diff --git a/include/linux/msi.h b/include/linux/msi.h index 36ba6a0852ea..26d07e23052e 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; } |