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Commit 69790ba9 authored by Thomas Gleixner's avatar Thomas Gleixner
Browse files

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: default avatarThomas Gleixner <tglx@linutronix.de>
Tested-by: default avatarAlexandru Chirvasitu <achirvasub@gmail.com>
Tested-by: default avatarAndy 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
parent da5dd9e8

include/linux/irq.h

+17 −0
Original line number Diff line number Diff line
@@ -212,6 +212,7 @@ struct irq_data { 
 *				  mask. Applies only to affinity managed irqs.

 * IRQD_SINGLE_TARGET		- IRQ allows only a single affinity target

 * IRQD_DEFAULT_TRIGGER_SET	- Expected trigger already been set

 * IRQD_CAN_RESERVE		- Can use reservation mode

 */

enum {

	IRQD_TRIGGER_MASK		= 0xf,
@@ -233,6 +234,7 @@ enum { 
	IRQD_MANAGED_SHUTDOWN		= (1 << 23),

	IRQD_SINGLE_TARGET		= (1 << 24),

	IRQD_DEFAULT_TRIGGER_SET	= (1 << 25),

	IRQD_CAN_RESERVE		= (1 << 26),

};



#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;

}



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



static inline irq_hw_number_t irqd_to_hwirq(struct irq_data *d)

kernel/irq/debugfs.c

+1 −0
Original line number Diff line number Diff line
@@ -113,6 +113,7 @@ static const struct irq_bit_descr irqdata_states[] = { 
	BIT_MASK_DESCR(IRQD_SETAFFINITY_PENDING),

	BIT_MASK_DESCR(IRQD_AFFINITY_MANAGED),

	BIT_MASK_DESCR(IRQD_MANAGED_SHUTDOWN),

	BIT_MASK_DESCR(IRQD_CAN_RESERVE),



	BIT_MASK_DESCR(IRQD_FORWARDED_TO_VCPU),