From 4173a0e7371ece227559b44943c6fd456ee470d1 Mon Sep 17 00:00:00 2001 From: Dean Nelson Date: Thu, 2 Oct 2008 12:18:21 -0500 Subject: x86, UV: add uv_setup_irq() and uv_teardown_irq() functions, v3 Provide a means for UV interrupt MMRs to be setup with the message to be sent when an MSI is raised. Signed-off-by: Dean Nelson Signed-off-by: Ingo Molnar --- arch/x86/kernel/uv_irq.c | 77 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 77 insertions(+) create mode 100644 arch/x86/kernel/uv_irq.c (limited to 'arch/x86/kernel/uv_irq.c') diff --git a/arch/x86/kernel/uv_irq.c b/arch/x86/kernel/uv_irq.c new file mode 100644 index 00000000000..6bd26c91c30 --- /dev/null +++ b/arch/x86/kernel/uv_irq.c @@ -0,0 +1,77 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * SGI UV IRQ functions + * + * Copyright (C) 2008 Silicon Graphics, Inc. All rights reserved. + */ + +#include +#include +#include + +static void uv_noop(unsigned int irq) +{ +} + +static unsigned int uv_noop_ret(unsigned int irq) +{ + return 0; +} + +static void uv_ack_apic(unsigned int irq) +{ + ack_APIC_irq(); +} + +struct irq_chip uv_irq_chip = { + .name = "UV-CORE", + .startup = uv_noop_ret, + .shutdown = uv_noop, + .enable = uv_noop, + .disable = uv_noop, + .ack = uv_noop, + .mask = uv_noop, + .unmask = uv_noop, + .eoi = uv_ack_apic, + .end = uv_noop, +}; + +/* + * Set up a mapping of an available irq and vector, and enable the specified + * MMR that defines the MSI that is to be sent to the specified CPU when an + * interrupt is raised. + */ +int uv_setup_irq(char *irq_name, int cpu, int mmr_blade, + unsigned long mmr_offset) +{ + int irq; + int ret; + + irq = create_irq(); + if (irq <= 0) + return -EBUSY; + + ret = arch_enable_uv_irq(irq_name, irq, cpu, mmr_blade, mmr_offset); + if (ret != irq) + destroy_irq(irq); + + return ret; +} +EXPORT_SYMBOL_GPL(uv_setup_irq); + +/* + * Tear down a mapping of an irq and vector, and disable the specified MMR that + * defined the MSI that was to be sent to the specified CPU when an interrupt + * was raised. + * + * Set mmr_blade and mmr_offset to what was passed in on uv_setup_irq(). + */ +void uv_teardown_irq(unsigned int irq, int mmr_blade, unsigned long mmr_offset) +{ + arch_disable_uv_irq(mmr_blade, mmr_offset); + destroy_irq(irq); +} +EXPORT_SYMBOL_GPL(uv_teardown_irq); -- cgit v1.2.3 From 37762b6ffb37f9e21cbc6f80902aa06b7a053fd7 Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Fri, 3 Oct 2008 11:38:37 +0200 Subject: x86, UV: add uv_setup_irq() and uv_teardown_irq() functions, v3, fix fix: arch/x86/kernel/uv_irq.c: In function 'uv_ack_apic': arch/x86/kernel/uv_irq.c:26: error: implicit declaration of function 'ack_APIC_irq' Signed-off-by: Ingo Molnar --- arch/x86/kernel/uv_irq.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'arch/x86/kernel/uv_irq.c') diff --git a/arch/x86/kernel/uv_irq.c b/arch/x86/kernel/uv_irq.c index 6bd26c91c30..aeef529917e 100644 --- a/arch/x86/kernel/uv_irq.c +++ b/arch/x86/kernel/uv_irq.c @@ -10,6 +10,8 @@ #include #include + +#include #include static void uv_noop(unsigned int irq) -- cgit v1.2.3