From patchwork Fri Feb 5 20:53:31 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dave Jiang X-Patchwork-Id: 12070947 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8867CC433E0 for ; Fri, 5 Feb 2021 21:07:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 48E2F64FB7 for ; Fri, 5 Feb 2021 21:07:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233258AbhBEVHj (ORCPT ); Fri, 5 Feb 2021 16:07:39 -0500 Received: from mga03.intel.com ([134.134.136.65]:37593 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233233AbhBETLt (ORCPT ); Fri, 5 Feb 2021 14:11:49 -0500 IronPort-SDR: t7IHgm0xHcwlvD/vEMn1cV70rm0mXzTnQunjifcQG1GdTgqds5iK4sAdmOCvBMytcaUhr40M4y JH9gNMrheMjw== X-IronPort-AV: E=McAfee;i="6000,8403,9886"; a="181551539" X-IronPort-AV: E=Sophos;i="5.81,156,1610438400"; d="scan'208";a="181551539" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Feb 2021 12:53:32 -0800 IronPort-SDR: NObB7WXcy1BzHBA+4p4EBEI0yd1hrZ5n6VRbRp/2P0KQQVsx/X7elqYn50dg5Z0vCaDFybutip mD0ksTTqT0Vg== X-IronPort-AV: E=Sophos;i="5.81,156,1610438400"; d="scan'208";a="434596933" Received: from djiang5-desk3.ch.intel.com ([143.182.136.137]) by orsmga001-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Feb 2021 12:53:31 -0800 Subject: [PATCH v5 06/14] vfio/mdev: idxd: add mdev type as a new wq type From: Dave Jiang To: alex.williamson@redhat.com, kwankhede@nvidia.com, tglx@linutronix.de, vkoul@kernel.org Cc: megha.dey@intel.com, jacob.jun.pan@intel.com, ashok.raj@intel.com, jgg@mellanox.com, yi.l.liu@intel.com, baolu.lu@intel.com, kevin.tian@intel.com, sanjay.k.kumar@intel.com, tony.luck@intel.com, dan.j.williams@intel.com, eric.auger@redhat.com, parav@mellanox.com, netanelg@mellanox.com, shahafs@mellanox.com, pbonzini@redhat.com, dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Date: Fri, 05 Feb 2021 13:53:31 -0700 Message-ID: <161255841136.339900.9537818102228577552.stgit@djiang5-desk3.ch.intel.com> In-Reply-To: <161255810396.339900.7646244556839438765.stgit@djiang5-desk3.ch.intel.com> References: <161255810396.339900.7646244556839438765.stgit@djiang5-desk3.ch.intel.com> User-Agent: StGit/0.23-29-ga622f1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org Add "mdev" wq type and support helpers. The mdev wq type marks the wq to be utilized as a VFIO mediated device. Signed-off-by: Dave Jiang --- drivers/dma/idxd/idxd.h | 2 ++ drivers/dma/idxd/sysfs.c | 13 +++++++++++-- 2 files changed, 13 insertions(+), 2 deletions(-) diff --git a/drivers/dma/idxd/idxd.h b/drivers/dma/idxd/idxd.h index a271942df2be..67428c8d476d 100644 --- a/drivers/dma/idxd/idxd.h +++ b/drivers/dma/idxd/idxd.h @@ -73,6 +73,7 @@ enum idxd_wq_type { IDXD_WQT_NONE = 0, IDXD_WQT_KERNEL, IDXD_WQT_USER, + IDXD_WQT_MDEV, }; struct idxd_cdev { @@ -344,6 +345,7 @@ void idxd_cleanup_sysfs(struct idxd_device *idxd); int idxd_register_driver(void); void idxd_unregister_driver(void); struct bus_type *idxd_get_bus_type(struct idxd_device *idxd); +bool is_idxd_wq_mdev(struct idxd_wq *wq); /* device interrupt control */ irqreturn_t idxd_irq_handler(int vec, void *data); diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c index ab5c76e1226b..13d20cbd4cf6 100644 --- a/drivers/dma/idxd/sysfs.c +++ b/drivers/dma/idxd/sysfs.c @@ -14,6 +14,7 @@ static char *idxd_wq_type_names[] = { [IDXD_WQT_NONE] = "none", [IDXD_WQT_KERNEL] = "kernel", [IDXD_WQT_USER] = "user", + [IDXD_WQT_MDEV] = "mdev", }; static void idxd_conf_device_release(struct device *dev) @@ -79,6 +80,11 @@ static inline bool is_idxd_wq_cdev(struct idxd_wq *wq) return wq->type == IDXD_WQT_USER; } +inline bool is_idxd_wq_mdev(struct idxd_wq *wq) +{ + return wq->type == IDXD_WQT_MDEV ? true : false; +} + static int idxd_config_bus_match(struct device *dev, struct device_driver *drv) { @@ -1151,8 +1157,9 @@ static ssize_t wq_type_show(struct device *dev, return sprintf(buf, "%s\n", idxd_wq_type_names[IDXD_WQT_KERNEL]); case IDXD_WQT_USER: - return sprintf(buf, "%s\n", - idxd_wq_type_names[IDXD_WQT_USER]); + return sprintf(buf, "%s\n", idxd_wq_type_names[IDXD_WQT_USER]); + case IDXD_WQT_MDEV: + return sprintf(buf, "%s\n", idxd_wq_type_names[IDXD_WQT_MDEV]); case IDXD_WQT_NONE: default: return sprintf(buf, "%s\n", @@ -1179,6 +1186,8 @@ static ssize_t wq_type_store(struct device *dev, wq->type = IDXD_WQT_KERNEL; else if (sysfs_streq(buf, idxd_wq_type_names[IDXD_WQT_USER])) wq->type = IDXD_WQT_USER; + else if (sysfs_streq(buf, idxd_wq_type_names[IDXD_WQT_MDEV])) + wq->type = IDXD_WQT_MDEV; else return -EINVAL;