From patchwork Mon Jun 24 06:53:09 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Kasireddy, Vivek" X-Patchwork-Id: 13709090 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 22BCAC2BD05 for ; Mon, 24 Jun 2024 07:21:20 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 3B4B210E378; Mon, 24 Jun 2024 07:21:19 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="AeWk51Ic"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.7]) by gabe.freedesktop.org (Postfix) with ESMTPS id 2475910E377 for ; Mon, 24 Jun 2024 07:21:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1719213678; x=1750749678; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=MSJJprILcfmTjSAIUrfkFgMpD14a45oMknilvPrEnN8=; b=AeWk51IcGVuvJmtsF6zlBkGf8LmYoHtM4o1HANZgwbva5Na0e3FDh4xI iEyTuZTEKUnRcWrOwUVyMajJ1bxIZ49GbroCo5SIpNnjAPzgbm/4mUIU5 8UHwt2Fq3Gud+FAe7Xv0JW2Pqsf3RwIIvqhgma6kwJdyxrqbF+va+xWmm 3Sn0FDnZJ7vgRVBCLaOHoZlzqXepEY51U1lJtaaeTYZuID8uvA3Zro/IG gTaE9SURCDkR4X41v1fWZcGwY1UpYdHNQKcHnbQgTiB1DSKhKuk3XDMGe oYOLhI+PAMFzep3UtEgHAW00+ASxea8nh+fhfoU4axofLF7puRrw0nrPD A==; X-CSE-ConnectionGUID: O+KydL3sTGaQX/J5mfQ5AQ== X-CSE-MsgGUID: 0xZwTKDFRmSGPLcdh42CXQ== X-IronPort-AV: E=McAfee;i="6700,10204,11112"; a="41574850" X-IronPort-AV: E=Sophos;i="6.08,261,1712646000"; d="scan'208";a="41574850" Received: from fmviesa007.fm.intel.com ([10.60.135.147]) by fmvoesa101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Jun 2024 00:21:17 -0700 X-CSE-ConnectionGUID: +orOdddtRD6FTIGvmxYEfg== X-CSE-MsgGUID: quPbILWfQiCWTVhzEeQ34w== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.08,261,1712646000"; d="scan'208";a="43085341" Received: from vkasired-desk2.fm.intel.com ([10.105.128.132]) by fmviesa007-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Jun 2024 00:21:17 -0700 From: Vivek Kasireddy To: dri-devel@lists.freedesktop.org, kvm@vger.kernel.org, linux-rdma@vger.kernel.org Cc: Vivek Kasireddy , Jason Gunthorpe Subject: [PATCH v2 1/3] vfio: Export vfio device get and put registration helpers Date: Sun, 23 Jun 2024 23:53:09 -0700 Message-ID: <20240624065552.1572580-2-vivek.kasireddy@intel.com> X-Mailer: git-send-email 2.45.1 In-Reply-To: <20240624065552.1572580-1-vivek.kasireddy@intel.com> References: <20240624065552.1572580-1-vivek.kasireddy@intel.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" These helpers are useful for managing additional references taken on the device from other associated VFIO modules. Original-patch-by: Jason Gunthorpe Signed-off-by: Vivek Kasireddy --- drivers/vfio/vfio_main.c | 2 ++ include/linux/vfio.h | 2 ++ 2 files changed, 4 insertions(+) diff --git a/drivers/vfio/vfio_main.c b/drivers/vfio/vfio_main.c index a5a62d9d963f..d06d4a9a3127 100644 --- a/drivers/vfio/vfio_main.c +++ b/drivers/vfio/vfio_main.c @@ -171,11 +171,13 @@ void vfio_device_put_registration(struct vfio_device *device) if (refcount_dec_and_test(&device->refcount)) complete(&device->comp); } +EXPORT_SYMBOL_GPL(vfio_device_put_registration); bool vfio_device_try_get_registration(struct vfio_device *device) { return refcount_inc_not_zero(&device->refcount); } +EXPORT_SYMBOL_GPL(vfio_device_try_get_registration); /* * VFIO driver API diff --git a/include/linux/vfio.h b/include/linux/vfio.h index 000a6cab2d31..2258b0585330 100644 --- a/include/linux/vfio.h +++ b/include/linux/vfio.h @@ -279,6 +279,8 @@ static inline void vfio_put_device(struct vfio_device *device) int vfio_register_group_dev(struct vfio_device *device); int vfio_register_emulated_iommu_dev(struct vfio_device *device); void vfio_unregister_group_dev(struct vfio_device *device); +bool vfio_device_try_get_registration(struct vfio_device *device); +void vfio_device_put_registration(struct vfio_device *device); int vfio_assign_device_set(struct vfio_device *device, void *set_id); unsigned int vfio_device_set_open_count(struct vfio_device_set *dev_set);