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From: Luigi Rizzo To: Thomas Gleixner , Marc Zyngier , Luigi Rizzo , Paolo Abeni Cc: linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, Bjorn Helgaas , Luigi Rizzo Content-Type: text/plain; charset="UTF-8" Add two flags to support software interrupt moderation: - IRQ_MODERATABLE is an irqdesc flag indicating that an interrupt supports moderation. This is a capability that can be set for eligible sources. - IRQD_MODERATED is an internal irqdata flag indicating that the interrupt is currently being moderated. This is a state flag. Signed-off-by: Luigi Rizzo --- include/linux/irq.h | 11 ++++++++++- kernel/irq/debugfs.c | 3 +++ kernel/irq/settings.h | 17 +++++++++++++++++ 3 files changed, 30 insertions(+), 1 deletion(-) diff --git a/include/linux/irq.h b/include/linux/irq.h index f485369b1b4f7..232df18af1b66 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -76,6 +76,7 @@ enum irqchip_irq_state; * IRQ_DISABLE_UNLAZY - Disable lazy irq disable * IRQ_HIDDEN - Don't show up in /proc/interrupts * IRQ_NO_DEBUG - Exclude from note_interrupt() debugging + * IRQ_MODERATABLE - Can do software interrupt moderation */ enum { IRQ_TYPE_NONE = 0x00000000, @@ -104,13 +105,14 @@ enum { IRQ_HIDDEN = (1 << 20), IRQ_NO_DEBUG = (1 << 21), IRQ_RESERVED = (1 << 22), + IRQ_MODERATABLE = (1 << 23), }; #define IRQF_MODIFY_MASK \ (IRQ_TYPE_SENSE_MASK | IRQ_NOPROBE | IRQ_NOREQUEST | \ IRQ_NOAUTOEN | IRQ_LEVEL | IRQ_NO_BALANCING | \ IRQ_PER_CPU | IRQ_NESTED_THREAD | IRQ_NOTHREAD | IRQ_PER_CPU_DEVID | \ - IRQ_IS_POLLED | IRQ_DISABLE_UNLAZY | IRQ_HIDDEN) + IRQ_IS_POLLED | IRQ_DISABLE_UNLAZY | IRQ_HIDDEN | IRQ_MODERATABLE) #define IRQ_NO_BALANCING_MASK (IRQ_PER_CPU | IRQ_NO_BALANCING) @@ -224,6 +226,7 @@ struct irq_data { * irqchip have flag IRQCHIP_ENABLE_WAKEUP_ON_SUSPEND set. * IRQD_RESEND_WHEN_IN_PROGRESS - Interrupt may fire when already in progress in which * case it must be resent at the next available opportunity. + * IRQD_MODERATED - Interrupt is currently moderated. */ enum { IRQD_TRIGGER_MASK = 0xf, @@ -249,6 +252,7 @@ enum { IRQD_AFFINITY_ON_ACTIVATE = BIT(28), IRQD_IRQ_ENABLED_ON_SUSPEND = BIT(29), IRQD_RESEND_WHEN_IN_PROGRESS = BIT(30), + IRQD_MODERATED = BIT(31), }; #define __irqd_to_state(d) ACCESS_PRIVATE((d)->common, state_use_accessors) @@ -438,6 +442,11 @@ static inline bool irqd_needs_resend_when_in_progress(struct irq_data *d) return __irqd_to_state(d) & IRQD_RESEND_WHEN_IN_PROGRESS; } +static inline bool irqd_is_moderated(struct irq_data *d) +{ + return __irqd_to_state(d) & IRQD_MODERATED; +} + #undef __irqd_to_state static inline irq_hw_number_t irqd_to_hwirq(struct irq_data *d) diff --git a/kernel/irq/debugfs.c b/kernel/irq/debugfs.c index 5c5ebaee35f2c..634f00c0f0f59 100644 --- a/kernel/irq/debugfs.c +++ b/kernel/irq/debugfs.c @@ -128,6 +128,8 @@ static const struct irq_bit_descr irqdata_states[] = { BIT_MASK_DESCR(IRQD_IRQ_ENABLED_ON_SUSPEND), BIT_MASK_DESCR(IRQD_RESEND_WHEN_IN_PROGRESS), + + BIT_MASK_DESCR(IRQD_MODERATED), }; static const struct irq_bit_descr irqdesc_states[] = { @@ -140,6 +142,7 @@ static const struct irq_bit_descr irqdesc_states[] = { BIT_MASK_DESCR(_IRQ_IS_POLLED), BIT_MASK_DESCR(_IRQ_DISABLE_UNLAZY), BIT_MASK_DESCR(_IRQ_HIDDEN), + BIT_MASK_DESCR(_IRQ_MODERATABLE), }; static const struct irq_bit_descr irqdesc_istates[] = { diff --git a/kernel/irq/settings.h b/kernel/irq/settings.h index 0a0c027a5d342..1663bb46d3a99 100644 --- a/kernel/irq/settings.h +++ b/kernel/irq/settings.h @@ -19,6 +19,7 @@ enum { _IRQ_HIDDEN = IRQ_HIDDEN, _IRQ_NO_DEBUG = IRQ_NO_DEBUG, _IRQ_PROC_VALID = IRQ_RESERVED, + _IRQ_MODERATABLE = IRQ_MODERATABLE, _IRQF_MODIFY_MASK = IRQF_MODIFY_MASK, }; @@ -36,6 +37,7 @@ enum { #define IRQ_HIDDEN GOT_YOU_MORON #define IRQ_NO_DEBUG GOT_YOU_MORON #define IRQ_RESERVED GOT_YOU_MORON +#define IRQ_MODERATABLE GOT_YOU_MORON #undef IRQF_MODIFY_MASK #define IRQF_MODIFY_MASK GOT_YOU_MORON @@ -193,3 +195,18 @@ static inline void irq_settings_update_proc_valid(struct irq_desc *desc, u32 set desc->status_use_accessors &= ~_IRQ_PROC_VALID; desc->status_use_accessors |= (set & _IRQ_PROC_VALID); } + +static inline bool irq_settings_moderatable(struct irq_desc *desc) +{ + return desc->status_use_accessors & _IRQ_MODERATABLE; +} + +static inline void irq_settings_set_moderatable(struct irq_desc *desc) +{ + desc->status_use_accessors |= _IRQ_MODERATABLE; +} + +static inline void irq_settings_clr_moderatable(struct irq_desc *desc) +{ + desc->status_use_accessors &= ~_IRQ_MODERATABLE; +} -- 2.55.0.737.g08866a6d13-goog