From patchwork Thu Aug 15 08:37:08 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiaowei Bao X-Patchwork-Id: 11095365 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 A4EA813B1 for ; Thu, 15 Aug 2019 08:47:53 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 91828286BF for ; Thu, 15 Aug 2019 08:47:53 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 83A76286D0; Thu, 15 Aug 2019 08:47:53 +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=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 26A37286BF for ; Thu, 15 Aug 2019 08:47:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=ifwCjUldOlA567vdv1Bl1InPLpFts+0e+GbpALDkmko=; b=QIQvJU8jAt3cdaE7AH24TSOtWb Qp0j/YT4TzJk/rZk4r/Tx64wXGQBZC5FqRZxBYzzBXgnBP8QyyQNind2c6uKnxSqvMVml7BW5ermd bnNfO9t4eVtzxg8walEjChX6/DAizFH89BgvTO/pQoIcoWrNB6xYNcB4H8IcKzt/vsss9l9Kj3Dzu dWEOpXd0q5LLDaxwMXj9KdDw3xJ63a7dYp0p3uRn7TYfJETH/os5GMt/jJKxYpruFjeq2GQ3btawi JqU9EXm9OUJd385xIrL2PPIpSclkO4P0So0Leo3rOFHUfBj0NVWcHWWJpiaQ6KsIqpP1/mJADkUEd YDrZ/VJw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hyBQG-0006Yj-M0; Thu, 15 Aug 2019 08:47:52 +0000 Received: from inva020.nxp.com ([92.121.34.13]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1hyBQC-0006Wx-SW for linux-arm-kernel@lists.infradead.org; Thu, 15 Aug 2019 08:47:50 +0000 Received: from inva020.nxp.com (localhost [127.0.0.1]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 1AE3D1A0467; Thu, 15 Aug 2019 10:47:45 +0200 (CEST) Received: from invc005.ap-rdc01.nxp.com (invc005.ap-rdc01.nxp.com [165.114.16.14]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 638CC1A0013; Thu, 15 Aug 2019 10:47:36 +0200 (CEST) Received: from titan.ap.freescale.net (TITAN.ap.freescale.net [10.192.208.233]) by invc005.ap-rdc01.nxp.com (Postfix) with ESMTP id 952794030E; Thu, 15 Aug 2019 16:47:25 +0800 (SGT) From: Xiaowei Bao To: jingoohan1@gmail.com, gustavo.pimentel@synopsys.com, bhelgaas@google.com, robh+dt@kernel.org, mark.rutland@arm.com, shawnguo@kernel.org, leoyang.li@nxp.com, kishon@ti.com, lorenzo.pieralisi@arm.com, arnd@arndb.de, gregkh@linuxfoundation.org, minghuan.Lian@nxp.com, mingkai.hu@nxp.com, roy.zang@nxp.com, linux-pci@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org Subject: [PATCH 02/10] PCI: designware-ep: Add the doorbell mode of MSI-X in EP mode Date: Thu, 15 Aug 2019 16:37:08 +0800 Message-Id: <20190815083716.4715-2-xiaowei.bao@nxp.com> X-Mailer: git-send-email 2.9.5 In-Reply-To: <20190815083716.4715-1-xiaowei.bao@nxp.com> References: <20190815083716.4715-1-xiaowei.bao@nxp.com> X-Virus-Scanned: ClamAV using ClamSMTP X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190815_014749_057328_3F814233 X-CRM114-Status: UNSURE ( 7.53 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Xiaowei Bao MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Add the doorbell mode of MSI-X in EP mode. Signed-off-by: Xiaowei Bao --- drivers/pci/controller/dwc/pcie-designware-ep.c | 14 ++++++++++++++ drivers/pci/controller/dwc/pcie-designware.h | 14 ++++++++++++++ 2 files changed, 28 insertions(+) diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c index 75e2955..e3a7cdf 100644 --- a/drivers/pci/controller/dwc/pcie-designware-ep.c +++ b/drivers/pci/controller/dwc/pcie-designware-ep.c @@ -454,6 +454,20 @@ int dw_pcie_ep_raise_msi_irq(struct dw_pcie_ep *ep, u8 func_no, return 0; } +int dw_pcie_ep_raise_msix_irq_doorbell(struct dw_pcie_ep *ep, u8 func_no, + u16 interrupt_num) +{ + struct dw_pcie *pci = to_dw_pcie_from_ep(ep); + u32 msg_data; + + msg_data = (func_no << PCIE_MSIX_DOORBELL_PF_SHIFT) | + (interrupt_num - 1); + + dw_pcie_writel_dbi(pci, PCIE_MSIX_DOORBELL, msg_data); + + return 0; +} + int dw_pcie_ep_raise_msix_irq(struct dw_pcie_ep *ep, u8 func_no, u16 interrupt_num) { diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h index 2b291e8..cd903e9 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -88,6 +88,11 @@ #define PCIE_MISC_CONTROL_1_OFF 0x8BC #define PCIE_DBI_RO_WR_EN BIT(0) +#define PCIE_MSIX_DOORBELL 0x948 +#define PCIE_MSIX_DOORBELL_PF_SHIFT 24 +#define PCIE_MSIX_DOORBELL_VF_SHIFT 16 +#define PCIE_MSIX_DOORBELL_VF_ACTIVE BIT(15) + /* * iATU Unroll-specific register definitions * From 4.80 core version the address translation will be made by unroll @@ -399,6 +404,8 @@ int dw_pcie_ep_raise_msi_irq(struct dw_pcie_ep *ep, u8 func_no, u8 interrupt_num); int dw_pcie_ep_raise_msix_irq(struct dw_pcie_ep *ep, u8 func_no, u16 interrupt_num); +int dw_pcie_ep_raise_msix_irq_doorbell(struct dw_pcie_ep *ep, u8 func_no, + u16 interrupt_num); void dw_pcie_ep_reset_bar(struct dw_pcie *pci, enum pci_barno bar); #else static inline void dw_pcie_ep_linkup(struct dw_pcie_ep *ep) @@ -431,6 +438,13 @@ static inline int dw_pcie_ep_raise_msix_irq(struct dw_pcie_ep *ep, u8 func_no, return 0; } +static inline int dw_pcie_ep_raise_msix_irq_doorbell(struct dw_pcie_ep *ep, + u8 func_no, + u16 interrupt_num) +{ + return 0; +} + static inline void dw_pcie_ep_reset_bar(struct dw_pcie *pci, enum pci_barno bar) { }