From patchwork Wed Oct 26 21:29:20 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kirti Wankhede X-Patchwork-Id: 9398479 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id D2FDC60234 for ; Wed, 26 Oct 2016 21:43:54 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9C85E29C05 for ; Wed, 26 Oct 2016 21:43:54 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 90C7129C34; Wed, 26 Oct 2016 21:43:54 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 2139129C05 for ; Wed, 26 Oct 2016 21:43:54 +0000 (UTC) Received: from localhost ([::1]:37591 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bzVzF-0005Tk-BA for patchwork-qemu-devel@patchwork.kernel.org; Wed, 26 Oct 2016 17:43:53 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:53974) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bzVlI-0002PF-2g for qemu-devel@nongnu.org; Wed, 26 Oct 2016 17:29:29 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bzVlF-0003A5-CR for qemu-devel@nongnu.org; Wed, 26 Oct 2016 17:29:28 -0400 Received: from hqemgate16.nvidia.com ([216.228.121.65]:2104) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1bzVlF-00039O-4I for qemu-devel@nongnu.org; Wed, 26 Oct 2016 17:29:25 -0400 Received: from hqnvupgp07.nvidia.com (Not Verified[216.228.121.13]) by hqemgate16.nvidia.com id ; Wed, 26 Oct 2016 14:29:12 -0700 Received: from HQMAIL105.nvidia.com ([172.20.13.39]) by hqnvupgp07.nvidia.com (PGP Universal service); Wed, 26 Oct 2016 02:29:30 -0700 X-PGP-Universal: processed; by hqnvupgp07.nvidia.com on Wed, 26 Oct 2016 02:29:30 -0700 Received: from HQMAIL105.nvidia.com (172.20.187.12) by HQMAIL105.nvidia.com (172.20.187.12) with Microsoft SMTP Server (TLS) id 15.0.1210.3; Wed, 26 Oct 2016 21:29:23 +0000 Received: from kwankhede-dev.nvidia.com (172.20.13.39) by HQMAIL105.nvidia.com (172.20.187.12) with Microsoft SMTP Server (TLS) id 15.0.1210.3 via Frontend Transport; Wed, 26 Oct 2016 21:29:20 +0000 From: Kirti Wankhede To: , , , Date: Thu, 27 Oct 2016 02:59:20 +0530 Message-ID: <1477517366-27871-14-git-send-email-kwankhede@nvidia.com> X-Mailer: git-send-email 2.7.0 In-Reply-To: <1477517366-27871-1-git-send-email-kwankhede@nvidia.com> References: <1477517366-27871-1-git-send-email-kwankhede@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 X-detected-operating-system: by eggs.gnu.org: Windows 7 or 8 X-Received-From: 216.228.121.65 Subject: [Qemu-devel] [PATCH v10 13/19] vfio: Introduce vfio_set_irqs_validate_and_prepare() X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: jike.song@intel.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, kevin.tian@intel.com, qemu-devel@nongnu.org, Kirti Wankhede , bjsdjshi@linux.vnet.ibm.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Vendor driver using mediated device framework would use same mechnism to validate and prepare IRQs. Introducing this function to reduce code replication in multiple drivers. Signed-off-by: Kirti Wankhede Signed-off-by: Neo Jia Change-Id: Ie201f269dda0713ca18a07dc4852500bd8b48309 --- drivers/vfio/vfio.c | 39 +++++++++++++++++++++++++++++++++++++++ include/linux/vfio.h | 4 ++++ 2 files changed, 43 insertions(+) diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c index 54d3dd71b783..9fd278155640 100644 --- a/drivers/vfio/vfio.c +++ b/drivers/vfio/vfio.c @@ -1858,6 +1858,45 @@ int vfio_info_add_capability(struct vfio_info_cap *caps, int cap_type_id, } EXPORT_SYMBOL(vfio_info_add_capability); +int vfio_set_irqs_validate_and_prepare(struct vfio_irq_set *hdr, int num_irqs, + int max_irq_type, size_t *data_size) +{ + unsigned long minsz; + + minsz = offsetofend(struct vfio_irq_set, count); + + if ((hdr->argsz < minsz) || (hdr->index >= max_irq_type) || + (hdr->flags & ~(VFIO_IRQ_SET_DATA_TYPE_MASK | + VFIO_IRQ_SET_ACTION_TYPE_MASK))) + return -EINVAL; + + if (data_size) + *data_size = 0; + + if (!(hdr->flags & VFIO_IRQ_SET_DATA_NONE)) { + size_t size; + + if (hdr->flags & VFIO_IRQ_SET_DATA_BOOL) + size = sizeof(uint8_t); + else if (hdr->flags & VFIO_IRQ_SET_DATA_EVENTFD) + size = sizeof(int32_t); + else + return -EINVAL; + + if ((hdr->argsz - minsz < hdr->count * size) || + (hdr->start >= num_irqs) || + (hdr->start + hdr->count > num_irqs)) + return -EINVAL; + + if (!data_size) + return -EINVAL; + + *data_size = hdr->count * size; + } + + return 0; +} +EXPORT_SYMBOL(vfio_set_irqs_validate_and_prepare); /* * Pin a set of guest PFNs and return their associated host PFNs for local diff --git a/include/linux/vfio.h b/include/linux/vfio.h index 8e2141d4601b..034c396c1706 100644 --- a/include/linux/vfio.h +++ b/include/linux/vfio.h @@ -114,6 +114,10 @@ extern void vfio_info_cap_shift(struct vfio_info_cap *caps, size_t offset); extern int vfio_info_add_capability(struct vfio_info_cap *caps, int cap_type_id, void *cap_type); +extern int vfio_set_irqs_validate_and_prepare(struct vfio_irq_set *hdr, + int num_irqs, int max_irq_type, + size_t *data_size); + struct pci_dev; #ifdef CONFIG_EEH extern void vfio_spapr_pci_eeh_open(struct pci_dev *pdev);