From patchwork Thu Sep 26 11:29:18 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kishon Vijay Abraham I X-Patchwork-Id: 1167880 X-Patchwork-Delegate: lorenzo.pieralisi@arm.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=quarantine dis=none) header.from=ti.com Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=ti.com header.i=@ti.com header.b="kRsZTqOy"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 46fCT84BHBz9sNx for ; Thu, 26 Sep 2019 21:32:28 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726394AbfIZLbI (ORCPT ); Thu, 26 Sep 2019 07:31:08 -0400 Received: from fllv0015.ext.ti.com ([198.47.19.141]:50968 "EHLO fllv0015.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726330AbfIZLbH (ORCPT ); Thu, 26 Sep 2019 07:31:07 -0400 Received: from fllv0034.itg.ti.com ([10.64.40.246]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id x8QBUx71042347; Thu, 26 Sep 2019 06:30:59 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1569497459; bh=6Ioi8K1OssG13g6PVxuHfADXQnIy2g3W7qB18SNPWyw=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=kRsZTqOy6X2yeu9rr2r5uNAOOTjIm5aO3etgX/liaqU4Tx9hfQ1A+6nUA03R/s102 9tBofIhk7R3VUP3KSoRPToFB7lZ/ZLfjw9rz4h+xpZstgQtGxRa9MRjh2SlbFHkWvK iPS73ogAd3YJX4wd99H+bG47F9nfhmr4ffNPyQJc= Received: from DLEE107.ent.ti.com (dlee107.ent.ti.com [157.170.170.37]) by fllv0034.itg.ti.com (8.15.2/8.15.2) with ESMTPS id x8QBUxYW091258 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 26 Sep 2019 06:30:59 -0500 Received: from DLEE111.ent.ti.com (157.170.170.22) by DLEE107.ent.ti.com (157.170.170.37) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1713.5; Thu, 26 Sep 2019 06:30:59 -0500 Received: from lelv0327.itg.ti.com (10.180.67.183) by DLEE111.ent.ti.com (157.170.170.22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1713.5 via Frontend Transport; Thu, 26 Sep 2019 06:30:51 -0500 Received: from a0393678ub.india.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0327.itg.ti.com (8.15.2/8.15.2) with ESMTP id x8QBUTjx069017; Thu, 26 Sep 2019 06:30:55 -0500 From: Kishon Vijay Abraham I To: Bjorn Helgaas , Jonathan Corbet , Rob Herring , Jon Mason , Dave Jiang , Allen Hubbe , Lorenzo Pieralisi CC: Mark Rutland , , , , , , Subject: [RFC PATCH 06/21] PCI: endpoint: Add API to create EPF device from device tree Date: Thu, 26 Sep 2019 16:59:18 +0530 Message-ID: <20190926112933.8922-7-kishon@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190926112933.8922-1-kishon@ti.com> References: <20190926112933.8922-1-kishon@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Add API to create EPF device from device tree and the device managed interface corresponding to it. This is added in order to define an endpoint function completely from device tree. Signed-off-by: Kishon Vijay Abraham I --- drivers/pci/endpoint/pci-epf-core.c | 68 +++++++++++++++++++++++++++++ include/linux/pci-epf.h | 6 +++ 2 files changed, 74 insertions(+) diff --git a/drivers/pci/endpoint/pci-epf-core.c b/drivers/pci/endpoint/pci-epf-core.c index 16feff8cad50..c74c7cc6d8bd 100644 --- a/drivers/pci/endpoint/pci-epf-core.c +++ b/drivers/pci/endpoint/pci-epf-core.c @@ -529,6 +529,73 @@ struct pci_epf *pci_epf_create(const char *name) } EXPORT_SYMBOL_GPL(pci_epf_create); +/** + * pci_epf_of_create() - create a new PCI EPF device from device tree node + * @node: the device node of the PCI EPF device. + * + * Invoke to create a new PCI EPF device by providing a device tree node + * with compatible property. + */ +struct pci_epf *pci_epf_of_create(struct device_node *node) +{ + struct pci_epf *epf; + const char *compat; + int ret; + + of_node_get(node); + + ret = of_property_read_string(node, "compatible", &compat); + if (ret) { + of_node_put(node); + return ERR_PTR(ret); + } + + epf = pci_epf_create(compat); + if (!IS_ERR(epf)) + epf->node = node; + + return epf; +} +EXPORT_SYMBOL_GPL(pci_epf_of_create); + +static void devm_epf_release(struct device *dev, void *res) +{ + struct pci_epf *epf = *(struct pci_epf **)res; + + pci_epf_destroy(epf); +} + +/** + * devm_pci_epf_of_create() - create a new PCI EPF device from device tree node + * @dev: device that is creating the new EPF + * @node: the device node of the PCI EPF device. + * + * Invoke to create a new PCI EPF device by providing a device tree node with + * compatible property. While at that, it also associates the device with the + * EPF using devres. On driver detach, release function is invoked on the devres + * data, where devres data is freed. + */ +struct pci_epf *devm_pci_epf_of_create(struct device *dev, + struct device_node *node) +{ + struct pci_epf **ptr, *epf; + + ptr = devres_alloc(devm_epf_release, sizeof(*ptr), GFP_KERNEL); + if (!ptr) + return ERR_PTR(-ENOMEM); + + epf = pci_epf_of_create(node); + if (!IS_ERR(epf)) { + *ptr = epf; + devres_add(dev, ptr); + } else { + devres_free(ptr); + } + + return epf; +} +EXPORT_SYMBOL_GPL(devm_pci_epf_of_create); + const struct pci_epf_device_id * pci_epf_match_device(const struct pci_epf_device_id *id, struct pci_epf *epf) { @@ -549,6 +616,7 @@ static void pci_epf_dev_release(struct device *dev) { struct pci_epf *epf = to_pci_epf(dev); + of_node_put(epf->node); kfree(epf->name); kfree(epf); } diff --git a/include/linux/pci-epf.h b/include/linux/pci-epf.h index 02090eb41563..7e997fb656fb 100644 --- a/include/linux/pci-epf.h +++ b/include/linux/pci-epf.h @@ -11,6 +11,7 @@ #include #include +#include #include struct pci_epf; @@ -101,6 +102,7 @@ struct pci_epf_bar { /** * struct pci_epf - represents the PCI EPF device * @dev: the PCI EPF device + * @node: the device tree node of the PCI EPF device * @name: the name of the PCI EPF device * @header: represents standard configuration header * @bar: represents the BAR of EPF device @@ -125,6 +127,7 @@ struct pci_epf_bar { */ struct pci_epf { struct device dev; + struct device_node *node; const char *name; struct pci_epf_header *header; struct pci_epf_bar bar[6]; @@ -167,6 +170,9 @@ static inline void *epf_get_drvdata(struct pci_epf *epf) const struct pci_epf_device_id * pci_epf_match_device(const struct pci_epf_device_id *id, struct pci_epf *epf); struct pci_epf *pci_epf_create(const char *name); +struct pci_epf *pci_epf_of_create(struct device_node *node); +struct pci_epf *devm_pci_epf_of_create(struct device *dev, + struct device_node *node); void pci_epf_destroy(struct pci_epf *epf); int __pci_epf_register_driver(struct pci_epf_driver *driver, struct module *owner);