#ifndef __PXA3XX_GCU_H__ #define __PXA3XX_GCU_H__ #include /* Number of 32bit words in display list (ring buffer). */ #define PXA3XX_GCU_BUFFER_WORDS ((256 * 1024 - 256) / 4) /* To be increased when breaking the ABI */ #define PXA3XX_GCU_SHARED_MAGIC 0x30000001 #define PXA3XX_GCU_BATCH_WORDS 8192 struct pxa3xx_gcu_shared { u32 buffer[PXA3XX_GCU_BUFFER_WORDS]; bool hw_running; unsigned long buffer_phys; unsigned int num_words; unsigned int num_writes; unsigned int num_done; unsigned int num_interrupts; unsigned int num_wait_idle; unsigned int num_wait_free; unsigned int num_idle; u32 magic; }; /* Initialization and synchronization. * Hardware is started upon write(). */ #define PXA3XX_GCU_IOCTL_RESET _IO('G', 0) #define PXA3XX_GCU_IOCTL_WAIT_IDLE _IO('G', 2) #endif /* __PXA3XX_GCU_H__ */ 32c8f7be0b726fec1a'/> net-next plumbingsTobias Klauser
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authorMarc Zyngier <marc.zyngier@arm.com>2017-01-17 16:00:48 +0000
committerThomas Gleixner <tglx@linutronix.de>2017-01-30 15:18:56 +0100
commit08d85f3ea99f1eeafc4e8507936190e86a16ee8c (patch)
tree410bb1acd0cd7dcfaad37ae7b63ff243b7fa4bee /include/dt-bindings/reset/stih415-resets.h
parent566cf877a1fcb6d6dc0126b076aad062054c2637 (diff)
irqdomain: Avoid activating interrupts more than once
Since commit f3b0946d629c ("genirq/msi: Make sure PCI MSIs are activated early"), we can end-up activating a PCI/MSI twice (once at allocation time, and once at startup time). This is normally of no consequences, except that there is some HW out there that may misbehave if activate is used more than once (the GICv3 ITS, for example, uses the activate callback to issue the MAPVI command, and the architecture spec says that "If there is an existing mapping for the EventID-DeviceID combination, behavior is UNPREDICTABLE"). While this could be worked around in each individual driver, it may make more sense to tackle the issue at the core level. In order to avoid getting in that situation, let's have a per-interrupt flag to remember if we have already activated that interrupt or not. Fixes: f3b0946d629c ("genirq/msi: Make sure PCI MSIs are activated early") Reported-and-tested-by: Andre Przywara <andre.przywara@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/1484668848-24361-1-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/dt-bindings/reset/stih415-resets.h')