From patchwork Sun May 26 04:37:40 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vidya Sagar X-Patchwork-Id: 10961243 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D2D89912 for ; Sun, 26 May 2019 04:38:36 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C310428A9D for ; Sun, 26 May 2019 04:38:36 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B75C528AA4; Sun, 26 May 2019 04:38:36 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2C5C528A9D for ; Sun, 26 May 2019 04:38:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727546AbfEZEib (ORCPT ); Sun, 26 May 2019 00:38:31 -0400 Received: from hqemgate16.nvidia.com ([216.228.121.65]:8075 "EHLO hqemgate16.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725825AbfEZEia (ORCPT ); Sun, 26 May 2019 00:38:30 -0400 Received: from hqpgpgate101.nvidia.com (Not Verified[216.228.121.13]) by hqemgate16.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Sat, 25 May 2019 21:38:29 -0700 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate101.nvidia.com (PGP Universal service); Sat, 25 May 2019 21:38:29 -0700 X-PGP-Universal: processed; by hqpgpgate101.nvidia.com on Sat, 25 May 2019 21:38:29 -0700 Received: from HQMAIL111.nvidia.com (172.20.187.18) by HQMAIL106.nvidia.com (172.18.146.12) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Sun, 26 May 2019 04:38:28 +0000 Received: from HQMAIL104.nvidia.com (172.18.146.11) by HQMAIL111.nvidia.com (172.20.187.18) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Sun, 26 May 2019 04:38:28 +0000 Received: from hqnvemgw01.nvidia.com (172.20.150.20) by HQMAIL104.nvidia.com (172.18.146.11) with Microsoft SMTP Server (TLS) id 15.0.1473.3 via Frontend Transport; Sun, 26 May 2019 04:38:28 +0000 Received: from vidyas-desktop.nvidia.com (Not Verified[10.24.37.38]) by hqnvemgw01.nvidia.com with Trustwave SEG (v7,5,8,10121) id ; Sat, 25 May 2019 21:38:28 -0700 From: Vidya Sagar To: , , , , , , , , , , CC: , , , , , , , , , Subject: [PATCH V8 04/15] PCI: dwc: Move config space capability search API Date: Sun, 26 May 2019 10:07:40 +0530 Message-ID: <20190526043751.12729-5-vidyas@nvidia.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190526043751.12729-1-vidyas@nvidia.com> References: <20190526043751.12729-1-vidyas@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1558845509; bh=n3Ke0c63Og1pQo/g1dPHO+FadtkOskQEQkpUsy4/bsM=; h=X-PGP-Universal:From:To:CC:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:X-NVConfidentiality:MIME-Version: Content-Type; b=Xb9bCfBn77VgvTCjtTr/okQD1J0GQf/cAxtnLOEbaBZla0ILTzeW+qo44quz1239P rXSjUR95P7JHamK+e5TRdlubulSs3475zj9pVDtxtsPMM5fdj0ac2i/K/5/Fbe6UwG K/3bLhiAmDM0wLE4NXB7lACPSOfzmJeVHMSiYLcE+b1ESCu+Z81nwQnWvyl8UMQMZG 7o9TgR7sAxpTP0rI+j5/xR2ZmdkxmNGl/Xg4Ct3bExUsryH4OpHMkigL3FBnoredSy OfusH5Xlasot441iPfiUzr+Hs7AfGvxrxI5J4EZ1yTmr2+6JIFLA3EJoLSv1xiW9by qQz4dxDymuiIQ== Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Move PCIe config space capability search API to common DesignWare file as this can be used by both host and ep mode codes. Signed-off-by: Vidya Sagar Acked-by: Gustavo Pimentel Reviewed-by: Thierry Reding --- Changes since [v7]: * Changed comment to explicitly state their mere resemblance to standard APIs but not their operation and place of use. Changes since [v6]: * Exported dw_pcie_find_capability() API Changes since [v5]: * None Changes since [v4]: * Removed redundant APIs in pcie-designware-ep.c file after moving them to pcie-designware.c file based on Bjorn's comments. Changes since [v3]: * Rebased to linux-next top of the tree Changes since [v2]: * None Changes since [v1]: * Removed dw_pcie_find_next_ext_capability() API from here and made a separate patch for that .../pci/controller/dwc/pcie-designware-ep.c | 37 +----------------- drivers/pci/controller/dwc/pcie-designware.c | 39 +++++++++++++++++++ drivers/pci/controller/dwc/pcie-designware.h | 2 + 3 files changed, 43 insertions(+), 35 deletions(-) diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c index 2bf5a35c0570..65f479250087 100644 --- a/drivers/pci/controller/dwc/pcie-designware-ep.c +++ b/drivers/pci/controller/dwc/pcie-designware-ep.c @@ -40,39 +40,6 @@ void dw_pcie_ep_reset_bar(struct dw_pcie *pci, enum pci_barno bar) __dw_pcie_ep_reset_bar(pci, bar, 0); } -static u8 __dw_pcie_ep_find_next_cap(struct dw_pcie *pci, u8 cap_ptr, - u8 cap) -{ - u8 cap_id, next_cap_ptr; - u16 reg; - - if (!cap_ptr) - return 0; - - reg = dw_pcie_readw_dbi(pci, cap_ptr); - cap_id = (reg & 0x00ff); - - if (cap_id > PCI_CAP_ID_MAX) - return 0; - - if (cap_id == cap) - return cap_ptr; - - next_cap_ptr = (reg & 0xff00) >> 8; - return __dw_pcie_ep_find_next_cap(pci, next_cap_ptr, cap); -} - -static u8 dw_pcie_ep_find_capability(struct dw_pcie *pci, u8 cap) -{ - u8 next_cap_ptr; - u16 reg; - - reg = dw_pcie_readw_dbi(pci, PCI_CAPABILITY_LIST); - next_cap_ptr = (reg & 0x00ff); - - return __dw_pcie_ep_find_next_cap(pci, next_cap_ptr, cap); -} - static int dw_pcie_ep_write_header(struct pci_epc *epc, u8 func_no, struct pci_epf_header *hdr) { @@ -612,9 +579,9 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep) dev_err(dev, "Failed to reserve memory for MSI/MSI-X\n"); return -ENOMEM; } - ep->msi_cap = dw_pcie_ep_find_capability(pci, PCI_CAP_ID_MSI); + ep->msi_cap = dw_pcie_find_capability(pci, PCI_CAP_ID_MSI); - ep->msix_cap = dw_pcie_ep_find_capability(pci, PCI_CAP_ID_MSIX); + ep->msix_cap = dw_pcie_find_capability(pci, PCI_CAP_ID_MSIX); offset = dw_pcie_ep_find_ext_capability(pci, PCI_EXT_CAP_ID_REBAR); if (offset) { diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c index 83cdd2ce2486..38d76bd63b8f 100644 --- a/drivers/pci/controller/dwc/pcie-designware.c +++ b/drivers/pci/controller/dwc/pcie-designware.c @@ -14,6 +14,45 @@ #include "pcie-designware.h" +/* + * These interfaces resemble the pci_find_*capability() interfaces, but these + * are for configuring host controllers, which are bridges *to* PCI devices but + * are not PCI devices themselves. + */ +static u8 __dw_pcie_find_next_cap(struct dw_pcie *pci, u8 cap_ptr, + u8 cap) +{ + u8 cap_id, next_cap_ptr; + u16 reg; + + if (!cap_ptr) + return 0; + + reg = dw_pcie_readw_dbi(pci, cap_ptr); + cap_id = (reg & 0x00ff); + + if (cap_id > PCI_CAP_ID_MAX) + return 0; + + if (cap_id == cap) + return cap_ptr; + + next_cap_ptr = (reg & 0xff00) >> 8; + return __dw_pcie_find_next_cap(pci, next_cap_ptr, cap); +} + +u8 dw_pcie_find_capability(struct dw_pcie *pci, u8 cap) +{ + u8 next_cap_ptr; + u16 reg; + + reg = dw_pcie_readw_dbi(pci, PCI_CAPABILITY_LIST); + next_cap_ptr = (reg & 0x00ff); + + return __dw_pcie_find_next_cap(pci, next_cap_ptr, cap); +} +EXPORT_SYMBOL_GPL(dw_pcie_find_capability); + int dw_pcie_read(void __iomem *addr, int size, u32 *val) { if (!IS_ALIGNED((uintptr_t)addr, size)) { diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h index 14762e262758..6cb978132469 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -251,6 +251,8 @@ struct dw_pcie { #define to_dw_pcie_from_ep(endpoint) \ container_of((endpoint), struct dw_pcie, ep) +u8 dw_pcie_find_capability(struct dw_pcie *pci, u8 cap); + int dw_pcie_read(void __iomem *addr, int size, u32 *val); int dw_pcie_write(void __iomem *addr, int size, u32 val);