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Thu, 28 Jan 2021 06:43:47 +0000 Date: Thu, 28 Jan 2021 14:42:58 +0800 From: Jisheng Zhang To: Jonathan Chocron , Lorenzo Pieralisi , Rob Herring , Bjorn Helgaas , Jingoo Han , Gustavo Pimentel Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 1/2] PCI: dwc: Don't assume the ops in dw_pcie always exists Message-ID: <20210128144258.10329aa4@xhacker.debian> In-Reply-To: <20210128144208.343052f7@xhacker.debian> References: <20210128144208.343052f7@xhacker.debian> X-Mailer: Claws Mail 3.17.8 (GTK+ 2.24.33; x86_64-pc-linux-gnu) X-Originating-IP: [192.147.44.204] X-ClientProxiedBy: BYAPR08CA0033.namprd08.prod.outlook.com (2603:10b6:a03:100::46) To BN8PR03MB4724.namprd03.prod.outlook.com (2603:10b6:408:96::21) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from xhacker.debian (192.147.44.204) by BYAPR08CA0033.namprd08.prod.outlook.com (2603:10b6:a03:100::46) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3805.17 via Frontend Transport; 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X-MS-Exchange-AntiSpam-MessageData: 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 X-OriginatorOrg: synaptics.com X-MS-Exchange-CrossTenant-Network-Message-Id: f5607dc1-0111-4ead-b47c-08d8c358104c X-MS-Exchange-CrossTenant-AuthSource: BN8PR03MB4724.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 28 Jan 2021 06:43:47.3734 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 335d1fbc-2124-4173-9863-17e7051a2a0e X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: Vr6AweDaJ8Zf6VtOXzWY/ygVaHKCsy53PMoIfIcVo8wN5A7Ob8oWosQe3pz3mgPxPfo51fuYcEmjq+IFEg8khQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN6PR03MB2563 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Some designware based device driver especially host only driver may work well with the default read_dbi/write_dbi/link_up implementation in pcie-designware.c, thus remove the assumption to simplify those drivers. Signed-off-by: Jisheng Zhang --- drivers/pci/controller/dwc/pcie-designware-ep.c | 8 +++----- drivers/pci/controller/dwc/pcie-designware-host.c | 2 +- drivers/pci/controller/dwc/pcie-designware.c | 14 +++++++------- 3 files changed, 11 insertions(+), 13 deletions(-) diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c index bcd1cd9ba8c8..1c25d8337151 100644 --- a/drivers/pci/controller/dwc/pcie-designware-ep.c +++ b/drivers/pci/controller/dwc/pcie-designware-ep.c @@ -434,10 +434,8 @@ static void dw_pcie_ep_stop(struct pci_epc *epc) struct dw_pcie_ep *ep = epc_get_drvdata(epc); struct dw_pcie *pci = to_dw_pcie_from_ep(ep); - if (!pci->ops->stop_link) - return; - - pci->ops->stop_link(pci); + if (pci->ops && pci->ops->stop_link) + pci->ops->stop_link(pci); } static int dw_pcie_ep_start(struct pci_epc *epc) @@ -445,7 +443,7 @@ static int dw_pcie_ep_start(struct pci_epc *epc) struct dw_pcie_ep *ep = epc_get_drvdata(epc); struct dw_pcie *pci = to_dw_pcie_from_ep(ep); - if (!pci->ops->start_link) + if (!pci->ops || !pci->ops->start_link) return -EINVAL; return pci->ops->start_link(pci); diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c index bcb5bd7ec5ef..0f0d8f477596 100644 --- a/drivers/pci/controller/dwc/pcie-designware-host.c +++ b/drivers/pci/controller/dwc/pcie-designware-host.c @@ -404,7 +404,7 @@ int dw_pcie_host_init(struct pcie_port *pp) dw_pcie_setup_rc(pp); dw_pcie_msi_init(pp); - if (!dw_pcie_link_up(pci) && pci->ops->start_link) { + if (!dw_pcie_link_up(pci) && pci->ops && pci->ops->start_link) { ret = pci->ops->start_link(pci); if (ret) goto err_free_msi; diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c index 5b72a5448d2e..ea1c07146442 100644 --- a/drivers/pci/controller/dwc/pcie-designware.c +++ b/drivers/pci/controller/dwc/pcie-designware.c @@ -141,7 +141,7 @@ u32 dw_pcie_read_dbi(struct dw_pcie *pci, u32 reg, size_t size) int ret; u32 val; - if (pci->ops->read_dbi) + if (pci->ops && pci->ops->read_dbi) return pci->ops->read_dbi(pci, pci->dbi_base, reg, size); ret = dw_pcie_read(pci->dbi_base + reg, size, &val); @@ -156,7 +156,7 @@ void dw_pcie_write_dbi(struct dw_pcie *pci, u32 reg, size_t size, u32 val) { int ret; - if (pci->ops->write_dbi) { + if (pci->ops && pci->ops->write_dbi) { pci->ops->write_dbi(pci, pci->dbi_base, reg, size, val); return; } @@ -171,7 +171,7 @@ void dw_pcie_write_dbi2(struct dw_pcie *pci, u32 reg, size_t size, u32 val) { int ret; - if (pci->ops->write_dbi2) { + if (pci->ops && pci->ops->write_dbi2) { pci->ops->write_dbi2(pci, pci->dbi_base2, reg, size, val); return; } @@ -186,7 +186,7 @@ static u32 dw_pcie_readl_atu(struct dw_pcie *pci, u32 reg) int ret; u32 val; - if (pci->ops->read_dbi) + if (pci->ops && pci->ops->read_dbi) return pci->ops->read_dbi(pci, pci->atu_base, reg, 4); ret = dw_pcie_read(pci->atu_base + reg, 4, &val); @@ -200,7 +200,7 @@ static void dw_pcie_writel_atu(struct dw_pcie *pci, u32 reg, u32 val) { int ret; - if (pci->ops->write_dbi) { + if (pci->ops && pci->ops->write_dbi) { pci->ops->write_dbi(pci, pci->atu_base, reg, 4, val); return; } @@ -315,7 +315,7 @@ static void __dw_pcie_prog_outbound_atu(struct dw_pcie *pci, u8 func_no, { u32 retries, val; - if (pci->ops->cpu_addr_fixup) + if (pci->ops && pci->ops->cpu_addr_fixup) cpu_addr = pci->ops->cpu_addr_fixup(pci, cpu_addr); if (pci->iatu_unroll_enabled) { @@ -525,7 +525,7 @@ int dw_pcie_link_up(struct dw_pcie *pci) { u32 val; - if (pci->ops->link_up) + if (pci->ops && pci->ops->link_up) return pci->ops->link_up(pci); val = readl(pci->dbi_base + PCIE_PORT_DEBUG1); From patchwork Thu Jan 28 06:43:24 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jisheng Zhang X-Patchwork-Id: 1432564 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; 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dkim=none (message not signed) header.d=none;amazon.com; dmarc=none action=none header.from=synaptics.com; Received: from BN8PR03MB4724.namprd03.prod.outlook.com (2603:10b6:408:96::21) by BN6PR03MB2563.namprd03.prod.outlook.com (2603:10b6:404:5a::18) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3805.16; Thu, 28 Jan 2021 06:44:00 +0000 Received: from BN8PR03MB4724.namprd03.prod.outlook.com ([fe80::f80a:407e:46ca:e6ce]) by BN8PR03MB4724.namprd03.prod.outlook.com ([fe80::f80a:407e:46ca:e6ce%5]) with mapi id 15.20.3784.017; Thu, 28 Jan 2021 06:44:00 +0000 Date: Thu, 28 Jan 2021 14:43:24 +0800 From: Jisheng Zhang To: Jonathan Chocron , Lorenzo Pieralisi , Rob Herring , Bjorn Helgaas , Jingoo Han , Gustavo Pimentel Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 2/2] PCI: dwc: al: Remove useless dw_pcie_ops Message-ID: <20210128144324.2fa8577c@xhacker.debian> In-Reply-To: <20210128144208.343052f7@xhacker.debian> References: <20210128144208.343052f7@xhacker.debian> X-Mailer: Claws Mail 3.17.8 (GTK+ 2.24.33; 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Signed-off-by: Jisheng Zhang Acked-by: Jonathan Chocron --- drivers/pci/controller/dwc/pcie-al.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/drivers/pci/controller/dwc/pcie-al.c b/drivers/pci/controller/dwc/pcie-al.c index abf37aa68e51..e8afa50129a8 100644 --- a/drivers/pci/controller/dwc/pcie-al.c +++ b/drivers/pci/controller/dwc/pcie-al.c @@ -314,9 +314,6 @@ static const struct dw_pcie_host_ops al_pcie_host_ops = { .host_init = al_pcie_host_init, }; -static const struct dw_pcie_ops dw_pcie_ops = { -}; - static int al_pcie_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -334,7 +331,6 @@ static int al_pcie_probe(struct platform_device *pdev) return -ENOMEM; pci->dev = dev; - pci->ops = &dw_pcie_ops; pci->pp.ops = &al_pcie_host_ops; al_pcie->pci = pci;