Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755509AbbGFN31 (ORCPT ); Mon, 6 Jul 2015 09:29:27 -0400 Received: from mail-wg0-f51.google.com ([74.125.82.51]:36641 "EHLO mail-wg0-f51.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755074AbbGFNZL (ORCPT ); Mon, 6 Jul 2015 09:25:11 -0400 From: Eric Auger To: eric.auger@st.com, eric.auger@linaro.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, christoffer.dall@linaro.org, marc.zyngier@arm.com, avi.kivity@gmail.com, mtosatti@redhat.com, feng.wu@intel.com, joro@8bytes.org, b.reynal@virtualopensystems.com Cc: linux-kernel@vger.kernel.org, patches@linaro.org, alex.williamson@redhat.com, pbonzini@redhat.com Subject: [RFC v2 1/9] VFIO: platform: registration of a dummy IRQ bypass producer Date: Mon, 6 Jul 2015 15:24:35 +0200 Message-Id: <1436189083-32527-2-git-send-email-eric.auger@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1436189083-32527-1-git-send-email-eric.auger@linaro.org> References: <1436189083-32527-1-git-send-email-eric.auger@linaro.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3089 Lines: 99 Register a dummy producer with void callbacks Signed-off-by: Eric Auger --- drivers/vfio/platform/vfio_platform_irq.c | 31 +++++++++++++++++++++++++++ drivers/vfio/platform/vfio_platform_private.h | 2 ++ 2 files changed, 33 insertions(+) diff --git a/drivers/vfio/platform/vfio_platform_irq.c b/drivers/vfio/platform/vfio_platform_irq.c index 88bba57..4b059bf 100644 --- a/drivers/vfio/platform/vfio_platform_irq.c +++ b/drivers/vfio/platform/vfio_platform_irq.c @@ -20,6 +20,7 @@ #include #include #include +#include #include "vfio_platform_private.h" @@ -177,6 +178,26 @@ static irqreturn_t vfio_irq_handler(int irq, void *dev_id) return IRQ_HANDLED; } +static void vfio_platform_irq_bypass_stop(struct irq_bypass_producer *prod) +{ +} + +static void vfio_platform_irq_bypass_resume(struct irq_bypass_producer *prod) +{ +} + +static void vfio_platform_irq_bypass_add_consumer( + struct irq_bypass_producer *prod, + struct irq_bypass_consumer *cons) +{ +} + +static void vfio_platform_irq_bypass_del_consumer( + struct irq_bypass_producer *prod, + struct irq_bypass_consumer *cons) +{ +} + static int vfio_set_trigger(struct vfio_platform_device *vdev, int index, int fd, irq_handler_t handler) { @@ -186,6 +207,7 @@ static int vfio_set_trigger(struct vfio_platform_device *vdev, int index, if (irq->trigger) { free_irq(irq->hwirq, irq); + irq_bypass_unregister_producer(&irq->producer); kfree(irq->name); eventfd_ctx_put(irq->trigger); irq->trigger = NULL; @@ -216,6 +238,15 @@ static int vfio_set_trigger(struct vfio_platform_device *vdev, int index, return ret; } + irq->producer.token = (void *)trigger; + irq->producer.irq = irq->hwirq; + irq->producer.add_consumer = vfio_platform_irq_bypass_add_consumer; + irq->producer.del_consumer = vfio_platform_irq_bypass_del_consumer; + irq->producer.stop = vfio_platform_irq_bypass_stop; + irq->producer.resume = vfio_platform_irq_bypass_resume; + ret = irq_bypass_register_producer(&irq->producer); + WARN_ON(ret); + if (!irq->masked) enable_irq(irq->hwirq); diff --git a/drivers/vfio/platform/vfio_platform_private.h b/drivers/vfio/platform/vfio_platform_private.h index 1c9b3d5..1d2d4d6 100644 --- a/drivers/vfio/platform/vfio_platform_private.h +++ b/drivers/vfio/platform/vfio_platform_private.h @@ -17,6 +17,7 @@ #include #include +#include #define VFIO_PLATFORM_OFFSET_SHIFT 40 #define VFIO_PLATFORM_OFFSET_MASK (((u64)(1) << VFIO_PLATFORM_OFFSET_SHIFT) - 1) @@ -37,6 +38,7 @@ struct vfio_platform_irq { spinlock_t lock; struct virqfd *unmask; struct virqfd *mask; + struct irq_bypass_producer producer; }; struct vfio_platform_region { -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/