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=-14.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNWANTED_LANGUAGE_BODY, 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 70665C433ED for ; Thu, 13 May 2021 11:04:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 462B8613AA for ; Thu, 13 May 2021 11:04:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233226AbhEMLFm (ORCPT ); Thu, 13 May 2021 07:05:42 -0400 Received: from mga02.intel.com ([134.134.136.20]:45141 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233068AbhEMLEp (ORCPT ); Thu, 13 May 2021 07:04:45 -0400 IronPort-SDR: s5fT3wvgdEpf/ZsXn1mywF+4tebfkvfsc7EpJVM5iYla9nwGDPlETu6J6dRYU/L8ivB/FTjYTm hX94UVJrXYXg== X-IronPort-AV: E=McAfee;i="6200,9189,9982"; a="187048380" X-IronPort-AV: E=Sophos;i="5.82,296,1613462400"; d="scan'208";a="187048380" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 May 2021 04:01:28 -0700 IronPort-SDR: 30A08SwyGwH2qsKFsEzqlO/1xdXSqK2UQb8WASWwa7ZODOACTAv/diCahu4kQZ0/he1qV1pgPj gqDkkQQ0EcRg== X-IronPort-AV: E=Sophos;i="5.82,296,1613462400"; d="scan'208";a="625984299" 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; 13 May 2021 04:01:26 -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 v3 13/14] intel_gna: add file operations to a 'misc' device Date: Thu, 13 May 2021 13:00:39 +0200 Message-Id: <20210513110040.2268-14-maciej.kwapulinski@linux.intel.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20210513110040.2268-1-maciej.kwapulinski@linux.intel.com> References: <20210513110040.2268-1-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/device.c | 60 +++++++++++++++++++++++++++++++-- 1 file changed, 57 insertions(+), 3 deletions(-) diff --git a/drivers/misc/intel/gna/device.c b/drivers/misc/intel/gna/device.c index 1e6345a8325b..c882055de8cf 100644 --- a/drivers/misc/intel/gna/device.c +++ b/drivers/misc/intel/gna/device.c @@ -4,7 +4,9 @@ #include #include #include +#include #include +#include #include @@ -20,16 +22,68 @@ module_param(recovery_timeout, int, 0644); MODULE_PARM_DESC(recovery_timeout, "Recovery timeout in seconds"); #endif -struct file; - 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); + + INIT_LIST_HEAD(&file_priv->flist); + + 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_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_del_init(&file_priv->flist); + mutex_unlock(&gna_priv->flist_lock); + kfree(file_priv); + f->private_data = NULL; + + 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_devm_idr_destroy(void *data) -- 2.28.0