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genirq: Introduce IRQD_CAN_RESERVE flag 

Add a new flag to mark interrupts which can use reservation mode. This is
going to be used in subsequent patches to disable reservation mode for a
certain class of MSI devices.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Alexandru Chirvasitu <achirvasub@gmail.com>
Tested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Dou Liyang <douly.fnst@cn.fujitsu.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Maciej W. Rozycki <macro@linux-mips.org>
Cc: Mikael Pettersson <mikpelinux@gmail.com>
Cc: Josh Poulson <jopoulso@microsoft.com>
Cc: Mihai Costache <v-micos@microsoft.com>
Cc: Stephen Hemminger <sthemmin@microsoft.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: linux-pci@vger.kernel.org
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Dexuan Cui <decui@microsoft.com>
Cc: Simon Xiao <sixiao@microsoft.com>
Cc: Saeed Mahameed <saeedm@mellanox.com>
Cc: Jork Loeser <Jork.Loeser@microsoft.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: devel@linuxdriverproject.org
Cc: KY Srinivasan <kys@microsoft.com>
Cc: Alan Cox <alan@linux.intel.com>
Cc: Sakari Ailus <sakari.ailus@intel.com>,
Cc: linux-media@vger.kernel.org
This commit is contained in:
Thomas Gleixner 2017-12-29 16:44:34 +01:00
parent da5dd9e854
commit 69790ba92b
2 changed files with 18 additions and 0 deletions
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17
include/linux/irq.h
View File

@ -212,6 +212,7 @@ struct irq_data {
* mask. Applies only to affinity managed irqs. * mask. Applies only to affinity managed irqs.
* IRQD_SINGLE_TARGET - IRQ allows only a single affinity target * IRQD_SINGLE_TARGET - IRQ allows only a single affinity target
* IRQD_DEFAULT_TRIGGER_SET - Expected trigger already been set * IRQD_DEFAULT_TRIGGER_SET - Expected trigger already been set
* IRQD_CAN_RESERVE - Can use reservation mode
*/ */
enum { enum {
IRQD_TRIGGER_MASK = 0xf, IRQD_TRIGGER_MASK = 0xf,
@ -233,6 +234,7 @@ enum {
IRQD_MANAGED_SHUTDOWN = (1 << 23), IRQD_MANAGED_SHUTDOWN = (1 << 23),
IRQD_SINGLE_TARGET = (1 << 24), IRQD_SINGLE_TARGET = (1 << 24),
IRQD_DEFAULT_TRIGGER_SET = (1 << 25), IRQD_DEFAULT_TRIGGER_SET = (1 << 25),
IRQD_CAN_RESERVE = (1 << 26),
}; };
#define __irqd_to_state(d) ACCESS_PRIVATE((d)->common, state_use_accessors) #define __irqd_to_state(d) ACCESS_PRIVATE((d)->common, state_use_accessors)
@ -377,6 +379,21 @@ static inline bool irqd_is_managed_and_shutdown(struct irq_data *d)
return __irqd_to_state(d) & IRQD_MANAGED_SHUTDOWN; return __irqd_to_state(d) & IRQD_MANAGED_SHUTDOWN;
} }
static inline void irqd_set_can_reserve(struct irq_data *d)
{
__irqd_to_state(d) |= IRQD_CAN_RESERVE;
}
static inline void irqd_clr_can_reserve(struct irq_data *d)
{
__irqd_to_state(d) &= ~IRQD_CAN_RESERVE;
}
static inline bool irqd_can_reserve(struct irq_data *d)
{
return __irqd_to_state(d) & IRQD_CAN_RESERVE;
}
#undef __irqd_to_state #undef __irqd_to_state
static inline irq_hw_number_t irqd_to_hwirq(struct irq_data *d) static inline irq_hw_number_t irqd_to_hwirq(struct irq_data *d)

1
kernel/irq/debugfs.c
View File

@ -113,6 +113,7 @@ static const struct irq_bit_descr irqdata_states[] = {
BIT_MASK_DESCR(IRQD_SETAFFINITY_PENDING), BIT_MASK_DESCR(IRQD_SETAFFINITY_PENDING),
BIT_MASK_DESCR(IRQD_AFFINITY_MANAGED), BIT_MASK_DESCR(IRQD_AFFINITY_MANAGED),
BIT_MASK_DESCR(IRQD_MANAGED_SHUTDOWN), BIT_MASK_DESCR(IRQD_MANAGED_SHUTDOWN),
BIT_MASK_DESCR(IRQD_CAN_RESERVE),
BIT_MASK_DESCR(IRQD_FORWARDED_TO_VCPU), BIT_MASK_DESCR(IRQD_FORWARDED_TO_VCPU),