From mboxrd@z Thu Jan 1 00:00:00 1970 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=-16.8 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,USER_AGENT_GIT autolearn=unavailable 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 1AF2DC43462 for ; Wed, 24 Mar 2021 18:39:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EC94561A2B for ; Wed, 24 Mar 2021 18:39:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237827AbhCXSjV (ORCPT ); Wed, 24 Mar 2021 14:39:21 -0400 Received: from mga09.intel.com ([134.134.136.24]:17741 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237691AbhCXSiw (ORCPT ); Wed, 24 Mar 2021 14:38:52 -0400 IronPort-SDR: Vry9XIMZyM3cYzJNDxsKdJxFQ1g7kQ1vUas7jclMGzpNDb7d3HrwMSaxuPJyw9UplxgA7ba9cB HyRX4x0UrR1w== X-IronPort-AV: E=McAfee;i="6000,8403,9933"; a="190859585" X-IronPort-AV: E=Sophos;i="5.81,275,1610438400"; d="scan'208";a="190859585" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Mar 2021 11:38:52 -0700 IronPort-SDR: Ck0UDrK3J/KzAcuje5/Avfx+nteDZ2PA5dQgq2nPVJ2x97zXIVlBYd4rAaR5tkfU+4UvPbU25V m9Mxy25UQYuw== X-IronPort-AV: E=Sophos;i="5.81,275,1610438400"; d="scan'208";a="608203941" Received: from gna-dev.igk.intel.com ([10.102.80.34]) by fmsmga005-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Mar 2021 11:38:49 -0700 From: Maciej Kwapulinski To: Greg Kroah-Hartman , Arnd Bergmann , Jonathan Corbet , Derek Kiernan , Dragan Cvetic , Andy Shevchenko Cc: linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, Maciej Kwapulinski , Tomasz Jankowski , Savo Novakovic , Jianxun Zhang Subject: [PATCH v2 13/13] intel_gna: add file operations to a 'misc' device Date: Wed, 24 Mar 2021 19:36:10 +0100 Message-Id: <20210324183610.4574-14-maciej.kwapulinski@linux.intel.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20210324183610.4574-1-maciej.kwapulinski@linux.intel.com> References: <20210324183610.4574-1-maciej.kwapulinski@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Tomasz Jankowski Signed-off-by: Tomasz Jankowski Tested-by: Savo Novakovic Co-developed-by: Jianxun Zhang Signed-off-by: Jianxun Zhang Co-developed-by: Maciej Kwapulinski Signed-off-by: Maciej Kwapulinski --- drivers/misc/intel/gna/gna_device.c | 60 ++++++++++++++++++++++++++++- 1 file changed, 59 insertions(+), 1 deletion(-) diff --git a/drivers/misc/intel/gna/gna_device.c b/drivers/misc/intel/gna/gna_device.c index 3f7f4c07d1a1..3f74a0a3bd30 100644 --- a/drivers/misc/intel/gna/gna_device.c +++ b/drivers/misc/intel/gna/gna_device.c @@ -93,12 +93,70 @@ MODULE_DEVICE_TABLE(pci, gna_pci_ids); static int gna_open(struct inode *inode, struct file *f) { - return -EPERM; + struct gna_file_private *file_priv; + struct gna_private *gna_priv; + + gna_priv = container_of(f->private_data, struct gna_private, misc); + + file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL); + if (!file_priv) + return -ENOMEM; + + file_priv->fd = f; + file_priv->gna_priv = gna_priv; + + mutex_init(&file_priv->memlist_lock); + INIT_LIST_HEAD(&file_priv->memory_list); + + mutex_lock(&gna_priv->flist_lock); + list_add_tail(&file_priv->flist, &gna_priv->file_list); + mutex_unlock(&gna_priv->flist_lock); + + f->private_data = file_priv; + + return 0; +} + +static int gna_release(struct inode *inode, struct file *f) +{ + struct gna_file_private *iter_file, *temp_file; + struct gna_memory_object *iter_mo, *temp_mo; + struct gna_file_private *file_priv; + struct gna_private *gna_priv; + + /* free all memory objects created by that file */ + file_priv = (struct gna_file_private *)f->private_data; + gna_priv = file_priv->gna_priv; + + mutex_lock(&file_priv->memlist_lock); + list_for_each_entry_safe(iter_mo, temp_mo, &file_priv->memory_list, file_mem_list) { + queue_work(gna_priv->request_wq, &iter_mo->work); + wait_event(iter_mo->waitq, true); + gna_memory_free(gna_priv, iter_mo); + } + mutex_unlock(&file_priv->memlist_lock); + + gna_delete_file_requests(f, gna_priv); + + mutex_lock(&gna_priv->flist_lock); + list_for_each_entry_safe(iter_file, temp_file, &gna_priv->file_list, flist) { + if (iter_file->fd == f) { + list_del(&iter_file->flist); + f->private_data = NULL; + kfree(iter_file); + break; + } + } + mutex_unlock(&gna_priv->flist_lock); + + return 0; } static const struct file_operations gna_file_ops = { .owner = THIS_MODULE, .open = gna_open, + .release = gna_release, + .unlocked_ioctl = gna_ioctl, }; static void gna_dev_release(struct gna_private *gna_priv) -- 2.28.0