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authorMaulik Shah <mkshah@codeaurora.org>2020-09-28 07:32:01 +0300
committerMarc Zyngier <maz@kernel.org>2020-10-06 13:23:41 +0300
commit90428a8eb4947f9c7c905a178f3520dc7e2ee6d2 (patch)
tree171d58fc480ed090807c29cd9bc27e6e5ca24930 /include/linux/irq.h
parentf41aaca593377a4fe3984459fd4539481263b4cd (diff)
downloadlinux-90428a8eb4947f9c7c905a178f3520dc7e2ee6d2.tar.xz
genirq/PM: Introduce IRQCHIP_ENABLE_WAKEUP_ON_SUSPEND flag
An interrupt that is disabled/masked but set for wakeup may still need to be able to wake up the system from sleep states like "suspend to RAM". To that effect, introduce the IRQCHIP_ENABLE_WAKEUP_ON_SUSPEND flag. If the irqchip have this flag set, the irq PM code will enable/unmask the irqs that are marked for wakeup, but that are in a disabled state. On resume, such irqs will be restored back to their disabled state. Suggested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Maulik Shah <mkshah@codeaurora.org> [maz: commit message fix-up] Signed-off-by: Marc Zyngier <maz@kernel.org> Tested-by: Stephen Boyd <swboyd@chromium.org> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Douglas Anderson <dianders@chromium.org> Link: https://lore.kernel.org/r/1601267524-20199-4-git-send-email-mkshah@codeaurora.org
Diffstat (limited to 'include/linux/irq.h')
-rw-r--r--include/linux/irq.h49
1 files changed, 30 insertions, 19 deletions
diff --git a/include/linux/irq.h b/include/linux/irq.h
index 1b7f4dfee35b..a8b84b88e673 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -215,6 +215,8 @@ struct irq_data {
* from actual interrupt context.
* IRQD_AFFINITY_ON_ACTIVATE - Affinity is set on activation. Don't call
* irq_chip::irq_set_affinity() when deactivated.
+ * IRQD_IRQ_ENABLED_ON_SUSPEND - Interrupt is enabled on suspend by irq pm if
+ * irqchip have flag IRQCHIP_ENABLE_WAKEUP_ON_SUSPEND set.
*/
enum {
IRQD_TRIGGER_MASK = 0xf,
@@ -240,6 +242,7 @@ enum {
IRQD_MSI_NOMASK_QUIRK = (1 << 27),
IRQD_HANDLE_ENFORCE_IRQCTX = (1 << 28),
IRQD_AFFINITY_ON_ACTIVATE = (1 << 29),
+ IRQD_IRQ_ENABLED_ON_SUSPEND = (1 << 30),
};
#define __irqd_to_state(d) ACCESS_PRIVATE((d)->common, state_use_accessors)
@@ -319,6 +322,11 @@ static inline bool irqd_is_handle_enforce_irqctx(struct irq_data *d)
return __irqd_to_state(d) & IRQD_HANDLE_ENFORCE_IRQCTX;
}
+static inline bool irqd_is_enabled_on_suspend(struct irq_data *d)
+{
+ return __irqd_to_state(d) & IRQD_IRQ_ENABLED_ON_SUSPEND;
+}
+
static inline bool irqd_is_wakeup_set(struct irq_data *d)
{
return __irqd_to_state(d) & IRQD_WAKEUP_STATE;
@@ -545,27 +553,30 @@ struct irq_chip {
/*
* irq_chip specific flags
*
- * IRQCHIP_SET_TYPE_MASKED: Mask before calling chip.irq_set_type()
- * IRQCHIP_EOI_IF_HANDLED: Only issue irq_eoi() when irq was handled
- * IRQCHIP_MASK_ON_SUSPEND: Mask non wake irqs in the suspend path
- * IRQCHIP_ONOFFLINE_ENABLED: Only call irq_on/off_line callbacks
- * when irq enabled
- * IRQCHIP_SKIP_SET_WAKE: Skip chip.irq_set_wake(), for this irq chip
- * IRQCHIP_ONESHOT_SAFE: One shot does not require mask/unmask
- * IRQCHIP_EOI_THREADED: Chip requires eoi() on unmask in threaded mode
- * IRQCHIP_SUPPORTS_LEVEL_MSI Chip can provide two doorbells for Level MSIs
- * IRQCHIP_SUPPORTS_NMI: Chip can deliver NMIs, only for root irqchips
+ * IRQCHIP_SET_TYPE_MASKED: Mask before calling chip.irq_set_type()
+ * IRQCHIP_EOI_IF_HANDLED: Only issue irq_eoi() when irq was handled
+ * IRQCHIP_MASK_ON_SUSPEND: Mask non wake irqs in the suspend path
+ * IRQCHIP_ONOFFLINE_ENABLED: Only call irq_on/off_line callbacks
+ * when irq enabled
+ * IRQCHIP_SKIP_SET_WAKE: Skip chip.irq_set_wake(), for this irq chip
+ * IRQCHIP_ONESHOT_SAFE: One shot does not require mask/unmask
+ * IRQCHIP_EOI_THREADED: Chip requires eoi() on unmask in threaded mode
+ * IRQCHIP_SUPPORTS_LEVEL_MSI: Chip can provide two doorbells for Level MSIs
+ * IRQCHIP_SUPPORTS_NMI: Chip can deliver NMIs, only for root irqchips
+ * IRQCHIP_ENABLE_WAKEUP_ON_SUSPEND: Invokes __enable_irq()/__disable_irq() for wake irqs
+ * in the suspend path if they are in disabled state
*/
enum {
- IRQCHIP_SET_TYPE_MASKED = (1 << 0),
- IRQCHIP_EOI_IF_HANDLED = (1 << 1),
- IRQCHIP_MASK_ON_SUSPEND = (1 << 2),
- IRQCHIP_ONOFFLINE_ENABLED = (1 << 3),
- IRQCHIP_SKIP_SET_WAKE = (1 << 4),
- IRQCHIP_ONESHOT_SAFE = (1 << 5),
- IRQCHIP_EOI_THREADED = (1 << 6),
- IRQCHIP_SUPPORTS_LEVEL_MSI = (1 << 7),
- IRQCHIP_SUPPORTS_NMI = (1 << 8),
+ IRQCHIP_SET_TYPE_MASKED = (1 << 0),
+ IRQCHIP_EOI_IF_HANDLED = (1 << 1),
+ IRQCHIP_MASK_ON_SUSPEND = (1 << 2),
+ IRQCHIP_ONOFFLINE_ENABLED = (1 << 3),
+ IRQCHIP_SKIP_SET_WAKE = (1 << 4),
+ IRQCHIP_ONESHOT_SAFE = (1 << 5),
+ IRQCHIP_EOI_THREADED = (1 << 6),
+ IRQCHIP_SUPPORTS_LEVEL_MSI = (1 << 7),
+ IRQCHIP_SUPPORTS_NMI = (1 << 8),
+ IRQCHIP_ENABLE_WAKEUP_ON_SUSPEND = (1 << 9),
};
#include <linux/irqdesc.h>