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=-18.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT 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 DC176C433DB for ; Wed, 20 Jan 2021 18:19:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9EE36233ED for ; Wed, 20 Jan 2021 18:19:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391994AbhATSTO (ORCPT ); Wed, 20 Jan 2021 13:19:14 -0500 Received: from lpdvacalvio01.broadcom.com ([192.19.229.182]:41054 "EHLO relay.smtp-ext.broadcom.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391909AbhATSJ7 (ORCPT ); Wed, 20 Jan 2021 13:09:59 -0500 Received: from lbrmn-lnxub113.broadcom.net (lbrmn-lnxub113.ric.broadcom.net [10.136.13.65]) by relay.smtp-ext.broadcom.com (Postfix) with ESMTP id 3ECAF2E5EF; Wed, 20 Jan 2021 09:58:35 -0800 (PST) DKIM-Filter: OpenDKIM Filter v2.11.0 relay.smtp-ext.broadcom.com 3ECAF2E5EF DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=broadcom.com; s=dkimrelay; t=1611165515; bh=G0JtokNm+NFuFyX3E5lg6X/oWOr8kduycb4M3eR02lM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JvniM4axQTxKXQgdrRBF+MJGQqXSDuno2ZDRglQiYrgWjtJpcyPrfIA+86fgzg1T7 3QykBn5I8/2CDfKtpRtpNLp93vrW5XG/SkcwV11FBbfVsGNRRmddsnLPKyB4+78Fa8 l3vH9aw2jfTLXkXEf/PRvnguVWulqDLBkT+2E9l0= From: Scott Branden To: Arnd Bergmann , Greg Kroah-Hartman , Scott Branden Cc: Kees Cook , linux-kernel@vger.kernel.org, bcm-kernel-feedback-list@broadcom.com, Desmond Yan , Olof Johansson Subject: [PATCH v9 04/13] misc: bcm-vk: add misc device to Broadcom VK driver Date: Wed, 20 Jan 2021 09:58:18 -0800 Message-Id: <20210120175827.14820-5-scott.branden@broadcom.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210120175827.14820-1-scott.branden@broadcom.com> References: <20210120175827.14820-1-scott.branden@broadcom.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add misc device base support to create and remove devnode. Additional misc functions for open/read/write/release/ioctl/sysfs, etc will be added in follow on commits to allow for individual review. Co-developed-by: Desmond Yan Signed-off-by: Desmond Yan Signed-off-by: Scott Branden Acked-by: Olof Johansson --- drivers/misc/bcm-vk/bcm_vk.h | 2 ++ drivers/misc/bcm-vk/bcm_vk_dev.c | 36 +++++++++++++++++++++++++++++++- 2 files changed, 37 insertions(+), 1 deletion(-) diff --git a/drivers/misc/bcm-vk/bcm_vk.h b/drivers/misc/bcm-vk/bcm_vk.h index c4fb61a84e41..0a366db693c8 100644 --- a/drivers/misc/bcm-vk/bcm_vk.h +++ b/drivers/misc/bcm-vk/bcm_vk.h @@ -7,6 +7,7 @@ #define BCM_VK_H #include +#include #include #include @@ -214,6 +215,7 @@ struct bcm_vk { struct bcm_vk_dauth_info dauth_info; + struct miscdevice miscdev; int devid; /* dev id allocated */ struct workqueue_struct *wq_thread; diff --git a/drivers/misc/bcm-vk/bcm_vk_dev.c b/drivers/misc/bcm-vk/bcm_vk_dev.c index adc3103c7012..4ecd5b5f80d3 100644 --- a/drivers/misc/bcm-vk/bcm_vk_dev.c +++ b/drivers/misc/bcm-vk/bcm_vk_dev.c @@ -7,6 +7,7 @@ #include #include #include +#include #include #include #include @@ -643,6 +644,7 @@ static int bcm_vk_probe(struct pci_dev *pdev, const struct pci_device_id *ent) char name[20]; struct bcm_vk *vk; struct device *dev = &pdev->dev; + struct miscdevice *misc_device; u32 boot_status; vk = kzalloc(sizeof(*vk), GFP_KERNEL); @@ -719,6 +721,19 @@ static int bcm_vk_probe(struct pci_dev *pdev, const struct pci_device_id *ent) vk->devid = id; snprintf(name, sizeof(name), DRV_MODULE_NAME ".%d", id); + misc_device = &vk->miscdev; + misc_device->minor = MISC_DYNAMIC_MINOR; + misc_device->name = kstrdup(name, GFP_KERNEL); + if (!misc_device->name) { + err = -ENOMEM; + goto err_ida_remove; + } + + err = misc_register(misc_device); + if (err) { + dev_err(dev, "failed to register device\n"); + goto err_kfree_name; + } INIT_WORK(&vk->wq_work, bcm_vk_wq_handler); @@ -727,7 +742,7 @@ static int bcm_vk_probe(struct pci_dev *pdev, const struct pci_device_id *ent) if (!vk->wq_thread) { dev_err(dev, "Fail to create workqueue thread\n"); err = -ENOMEM; - goto err_ida_remove; + goto err_misc_deregister; } /* sync other info */ @@ -749,11 +764,20 @@ static int bcm_vk_probe(struct pci_dev *pdev, const struct pci_device_id *ent) } } + dev_dbg(dev, "BCM-VK:%u created\n", id); + return 0; err_destroy_workqueue: destroy_workqueue(vk->wq_thread); +err_misc_deregister: + misc_deregister(misc_device); + +err_kfree_name: + kfree(misc_device->name); + misc_device->name = NULL; + err_ida_remove: ida_simple_remove(&bcm_vk_ida, id); @@ -783,6 +807,7 @@ static void bcm_vk_remove(struct pci_dev *pdev) { int i; struct bcm_vk *vk = pci_get_drvdata(pdev); + struct miscdevice *misc_device = &vk->miscdev; /* * Trigger a reset to card and wait enough time for UCODE to rerun, @@ -797,6 +822,13 @@ static void bcm_vk_remove(struct pci_dev *pdev) dma_free_coherent(&pdev->dev, nr_scratch_pages * PAGE_SIZE, vk->tdma_vaddr, vk->tdma_addr); + /* remove if name is set which means misc dev registered */ + if (misc_device->name) { + misc_deregister(misc_device); + kfree(misc_device->name); + ida_simple_remove(&bcm_vk_ida, vk->devid); + } + cancel_work_sync(&vk->wq_work); destroy_workqueue(vk->wq_thread); @@ -805,6 +837,8 @@ static void bcm_vk_remove(struct pci_dev *pdev) pci_iounmap(pdev, vk->bar[i]); } + dev_dbg(&pdev->dev, "BCM-VK:%d released\n", vk->devid); + pci_release_regions(pdev); pci_free_irq_vectors(pdev); pci_disable_device(pdev); -- 2.17.1