From patchwork Mon Mar 25 09:39:45 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: 10868619 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 F0A5818A6 for ; Mon, 25 Mar 2019 09:44:38 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E200228FB2 for ; Mon, 25 Mar 2019 09:44:38 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D67B428FE1; Mon, 25 Mar 2019 09:44:38 +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=unavailable 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 5F13F28FB2 for ; Mon, 25 Mar 2019 09:44:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730803AbfCYJoS (ORCPT ); Mon, 25 Mar 2019 05:44:18 -0400 Received: from lelv0143.ext.ti.com ([198.47.23.248]:45176 "EHLO lelv0143.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730757AbfCYJoR (ORCPT ); Mon, 25 Mar 2019 05:44:17 -0400 Received: from lelv0265.itg.ti.com ([10.180.67.224]) by lelv0143.ext.ti.com (8.15.2/8.15.2) with ESMTP id x2P9hvfM068411; Mon, 25 Mar 2019 04:43:57 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1553507037; bh=c3UBlJ2/J/eUILjH1LmTrngxtCdjzgHiiyV0ibrE7Fc=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=Xx+6TG67rlTZNWox5cCKm1CIXzIrJ/3ZGkd8A/+4NfqEMvyrzKYWZXv2evRtDV8Pa EODDlHSveYHeGXIsPucosbjNEP+p8itvmSkLMZvoDzzs6Yp/ut/y/i7FA2btMFsrem MxD0Uk3prVEHLuOnwIFyXgyNxnB4RQKhCSRUBkxw= Received: from DLEE105.ent.ti.com (dlee105.ent.ti.com [157.170.170.35]) by lelv0265.itg.ti.com (8.15.2/8.15.2) with ESMTPS id x2P9hvR5055269 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 25 Mar 2019 04:43:57 -0500 Received: from DLEE109.ent.ti.com (157.170.170.41) by DLEE105.ent.ti.com (157.170.170.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1713.5; Mon, 25 Mar 2019 04:43:56 -0500 Received: from dflp32.itg.ti.com (10.64.6.15) by DLEE109.ent.ti.com (157.170.170.41) with Microsoft SMTP Server (version=TLS1_0, cipher=TLS_RSA_WITH_AES_256_CBC_SHA) id 15.1.1713.5 via Frontend Transport; Mon, 25 Mar 2019 04:43:57 -0500 Received: from a0393678ub.india.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dflp32.itg.ti.com (8.14.3/8.13.8) with ESMTP id x2P9fead028077; Mon, 25 Mar 2019 04:43:52 -0500 From: Kishon Vijay Abraham I To: Gustavo Pimentel , Bjorn Helgaas , Rob Herring , Lorenzo Pieralisi , Arnd Bergmann , Murali Karicheri CC: Kishon Vijay Abraham I , Jingoo Han , Greg Kroah-Hartman , , , , , , , Minghuan Lian , Mingkai Hu , Roy Zang , Jesper Nilsson Subject: [PATCH v3 24/26] PCI: designware-ep: Use aligned ATU window for raising MSI interrupts Date: Mon, 25 Mar 2019 15:09:45 +0530 Message-ID: <20190325093947.32633-25-kishon@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190325093947.32633-1-kishon@ti.com> References: <20190325093947.32633-1-kishon@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Certain platforms like K2G reguires the outbound ATU window to be aligned. The alignment size is already present in mem->page_size. Use the alignment size present in mem->page_size to configre a aligned ATU window. In order to raise an interrupt, CPU has to write to address offset from the start of the window unlike before where writes were always to the beginning of the ATU window. Signed-off-by: Kishon Vijay Abraham I --- drivers/pci/controller/dwc/pcie-designware-ep.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c index 0c208b9bda43..2bf5a35c0570 100644 --- a/drivers/pci/controller/dwc/pcie-designware-ep.c +++ b/drivers/pci/controller/dwc/pcie-designware-ep.c @@ -397,6 +397,7 @@ int dw_pcie_ep_raise_msi_irq(struct dw_pcie_ep *ep, u8 func_no, { struct dw_pcie *pci = to_dw_pcie_from_ep(ep); struct pci_epc *epc = ep->epc; + unsigned int aligned_offset; u16 msg_ctrl, msg_data; u32 msg_addr_lower, msg_addr_upper, reg; u64 msg_addr; @@ -422,13 +423,15 @@ int dw_pcie_ep_raise_msi_irq(struct dw_pcie_ep *ep, u8 func_no, reg = ep->msi_cap + PCI_MSI_DATA_32; msg_data = dw_pcie_readw_dbi(pci, reg); } - msg_addr = ((u64) msg_addr_upper) << 32 | msg_addr_lower; + aligned_offset = msg_addr_lower & (epc->mem->page_size - 1); + msg_addr = ((u64)msg_addr_upper) << 32 | + (msg_addr_lower & ~aligned_offset); ret = dw_pcie_ep_map_addr(epc, func_no, ep->msi_mem_phys, msg_addr, epc->mem->page_size); if (ret) return ret; - writel(msg_data | (interrupt_num - 1), ep->msi_mem); + writel(msg_data | (interrupt_num - 1), ep->msi_mem + aligned_offset); dw_pcie_ep_unmap_addr(epc, func_no, ep->msi_mem_phys);