From patchwork Mon Apr 22 06:30:32 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Kasireddy, Vivek" X-Patchwork-Id: 13637707 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.15]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1D57B482FE; Mon, 22 Apr 2024 07:00:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.15 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713769236; cv=none; b=UOY2NK71o3aZtQEh0pIeuz/mnPTitikxJnGm295XWB6EeqTQxNjzi2i0nfUKYAgkhi2BlOaTTveOm/cRASr5lSZPvbU8pQ+4cBeVhUoq7za2vWVYVAWsKKXBlq1udAGMPlMYUyjJ/W3vWA24eBr5GK5bJ1PWPJjmJbg0FQRe/2M= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713769236; c=relaxed/simple; bh=QW1bLUiDxhnwM5EPUxf7J82zqdGu2UdJY9OdWB1xHmI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Vrcc66j9a5/piGiGQAXoMSu6Zm9DzGTt+EUr1GOGQv4i7CoMilfHWjUm6aI4FGGoToD8IPg3G1NUKAtLtIfwT6MTbEDYCsKuPl5dWG/jDmnzskYBJ/eMETsJflqCQV6Dk0pWEQ/tY0qlHkODIr2Wi9t3dd6kgUcmSUfS5VJCfH0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=anpJggvx; arc=none smtp.client-ip=198.175.65.15 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="anpJggvx" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1713769234; x=1745305234; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=QW1bLUiDxhnwM5EPUxf7J82zqdGu2UdJY9OdWB1xHmI=; b=anpJggvxvTGoVfRNBSStrQOeKkAHgCVSZusqCakLKov4dEJ/RiNsGLJu zhAD6Rwi6piXX0BofEy7ZQlAFtfatwegsWGyaRBmYjfUD+G+NH0s2C9yA G0Jz2ulsSj6a427qpXZD10sM0stYQUrHpoxASvx4cTQJldvzguEmHtPk2 LM9mynPq6Su6rGaf0eL1ZLn+0dOnN82VYq0T3z9jv6zAHAL164gOiUTkg Vq9OT4DF+3lmwbl+lDX/zoC2qPB94yqhZyrp0FTU6Te3X9/txpPcFqEiW BWdEeh5Lg6jHRgtSuBQEQTf2S/24HpPVr9riVyZBWA6JJw0wdqv3Npt5N w==; X-CSE-ConnectionGUID: 9MO8qGcwQEyurNynKRLMRw== X-CSE-MsgGUID: 1ztQiMT0QwS5KYgIlAt/yA== X-IronPort-AV: E=McAfee;i="6600,9927,11051"; a="13080591" X-IronPort-AV: E=Sophos;i="6.07,220,1708416000"; d="scan'208";a="13080591" Received: from orviesa001.jf.intel.com ([10.64.159.141]) by orvoesa107.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Apr 2024 00:00:29 -0700 X-CSE-ConnectionGUID: YBv7kN4xSkCwc4A71P7JmQ== X-CSE-MsgGUID: +NAByN0NQSa6Wmjkz/k1wQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.07,220,1708416000"; d="scan'208";a="61362275" Received: from vkasired-desk2.fm.intel.com ([10.105.128.132]) by smtpauth.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Apr 2024 00:00:30 -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 v1 1/2] vfio: Export vfio device get and put registration helpers Date: Sun, 21 Apr 2024 23:30:32 -0700 Message-ID: <20240422063602.3690124-2-vivek.kasireddy@intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240422063602.3690124-1-vivek.kasireddy@intel.com> References: <20240422063602.3690124-1-vivek.kasireddy@intel.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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 e97d796a54fb..7434461fc1b3 100644 --- a/drivers/vfio/vfio_main.c +++ b/drivers/vfio/vfio_main.c @@ -165,11 +165,13 @@ 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 8b1a29820409..a6302fca8acd 100644 --- a/include/linux/vfio.h +++ b/include/linux/vfio.h @@ -278,6 +278,8 @@ 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);