From patchwork Tue Sep 15 23:28:58 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dave Jiang X-Patchwork-Id: 11778369 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 291236CA for ; Tue, 15 Sep 2020 23:29:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 17FF02193E for ; Tue, 15 Sep 2020 23:29:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727424AbgIOX3e (ORCPT ); Tue, 15 Sep 2020 19:29:34 -0400 Received: from mga05.intel.com ([192.55.52.43]:50403 "EHLO mga05.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727176AbgIOX3A (ORCPT ); Tue, 15 Sep 2020 19:29:00 -0400 IronPort-SDR: ecUJIcx9HTEbRlrqx93s64aAN0NJL3hY+7pr+x/SGII57DwC6xQ/LzxiKkFWe3a0JXN2dYH/W9 WELW5quH+cvQ== X-IronPort-AV: E=McAfee;i="6000,8403,9745"; a="244200291" X-IronPort-AV: E=Sophos;i="5.76,430,1592895600"; d="scan'208";a="244200291" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Sep 2020 16:28:59 -0700 IronPort-SDR: 7SVpz8o6qKHdfPiE4xcigHFUb8nzIGCbbNX8ZkbJLzt3JgPWlAwNg4pH1Go5qsJbbKwbFnyTNL aJhnCL4OdqUg== X-IronPort-AV: E=Sophos;i="5.76,430,1592895600"; d="scan'208";a="507771710" Received: from djiang5-desk3.ch.intel.com ([143.182.136.137]) by fmsmga005-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Sep 2020 16:28:58 -0700 Subject: [PATCH v3 12/18] dmaengine: idxd: add mdev type as a new wq type From: Dave Jiang To: vkoul@kernel.org, megha.dey@intel.com, maz@kernel.org, bhelgaas@google.com, tglx@linutronix.de, alex.williamson@redhat.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, jing.lin@intel.com, dan.j.williams@intel.com, kwankhede@nvidia.com, eric.auger@redhat.com, parav@mellanox.com, jgg@mellanox.com, rafael@kernel.org, netanelg@mellanox.com, shahafs@mellanox.com, yan.y.zhao@linux.intel.com, pbonzini@redhat.com, samuel.ortiz@intel.com, mona.hossain@intel.com Cc: dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org, x86@kernel.org, linux-pci@vger.kernel.org, kvm@vger.kernel.org Date: Tue, 15 Sep 2020 16:28:58 -0700 Message-ID: <160021253826.67751.7453808239640664490.stgit@djiang5-desk3.ch.intel.com> In-Reply-To: <160021207013.67751.8220471499908137671.stgit@djiang5-desk3.ch.intel.com> References: <160021207013.67751.8220471499908137671.stgit@djiang5-desk3.ch.intel.com> User-Agent: StGit/unknown-version MIME-Version: 1.0 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@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 23d3ebca1da5..23287f8fd19a 100644 --- a/drivers/dma/idxd/idxd.h +++ b/drivers/dma/idxd/idxd.h @@ -65,6 +65,7 @@ enum idxd_wq_type { IDXD_WQT_NONE = 0, IDXD_WQT_KERNEL, IDXD_WQT_USER, + IDXD_WQT_MDEV, }; struct idxd_cdev { @@ -290,6 +291,7 @@ 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 cbb1038f1ed0..6eb67f744c8e 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) @@ -69,6 +70,11 @@ 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) { @@ -987,8 +993,9 @@ 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", @@ -1015,6 +1022,8 @@ 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;