/* * Shared Memory Communications over RDMA (SMC-R) and RoCE * * Definitions for IB environment * * Copyright IBM Corp. 2016 * * Author(s): Ursula Braun */ #ifndef _SMC_IB_H #define _SMC_IB_H #include #include #define SMC_MAX_PORTS 2 /* Max # of ports */ #define SMC_GID_SIZE sizeof(union ib_gid) #define SMC_IB_MAX_SEND_SGE 2 struct smc_ib_devices { /* list of smc ib devices definition */ struct list_head list; spinlock_t lock; /* protects list of smc ib devices */ }; extern struct smc_ib_devices smc_ib_devices; /* list of smc ib devices */ struct smc_ib_device { /* ib-device infos for smc */ struct list_head list; struct ib_device *ibdev; struct ib_port_attr pattr[SMC_MAX_PORTS]; /* ib dev. port attrs */ struct ib_event_handler event_handler; /* global ib_event handler */ struct ib_cq *roce_cq_send; /* send completion queue */ struct ib_cq *roce_cq_recv; /* recv completion queue */ struct tasklet_struct send_tasklet; /* called by send cq handler */ struct tasklet_struct recv_tasklet; /* called by recv cq handler */ char mac[SMC_MAX_PORTS][ETH_ALEN]; /* mac address per port*/ union ib_gid gid[SMC_MAX_PORTS]; /* gid per port */ u8 initialized : 1; /* ib dev CQ, evthdl done */ struct work_struct port_event_work; unsigned long port_event_mask; }; struct smc_buf_desc; struct smc_link; int smc_ib_register_client(void) __init; void smc_ib_unregister_client(void); bool smc_ib_port_active(struct smc_ib_device *smcibdev, u8 ibport); int smc_ib_remember_port_attr(struct smc_ib_device *smcibdev, u8 ibport); int smc_ib_buf_map(struct smc_ib_device *smcibdev, int buf_size, struct smc_buf_desc *buf_slot, enum dma_data_direction data_direction); void smc_ib_buf_unmap(struct smc_ib_device *smcibdev, int bufsize, struct smc_buf_desc *buf_slot, enum dma_data_direction data_direction); void smc_ib_dealloc_protection_domain(struct smc_link *lnk); int smc_ib_create_protection_domain(struct smc_link *lnk); void smc_ib_destroy_queue_pair(struct smc_link *lnk); int smc_ib_create_queue_pair(struct smc_link *lnk); int smc_ib_get_memory_region(struct ib_pd *pd, int access_flags, struct ib_mr **mr); int smc_ib_ready_link(struct smc_link *lnk); int smc_ib_modify_qp_rts(struct smc_link *lnk); int smc_ib_modify_qp_reset(struct smc_link *lnk); long smc_ib_setup_per_ibdev(struct smc_ib_device *smcibdev); #endif 6dfba96c543e55b6672d5a37e'/>
path: root/sound/isa/wavefront/Makefile
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/net-next.git/commit/net/xfrm/Kconfig?id=566cf877a1fcb6d6dc0126b076aad062054c2637'>566cf877a1fcb6d6dc0126b076aad062054c2637 (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 'net/xfrm/Kconfig')