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Thu, 7 Jan 2021 09:02:42 +0000 From: Zhiqiang Hou To: linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org, linux-arm-kernel@axis.com, lorenzo.pieralisi@arm.com, robh@kernel.org, bhelgaas@google.com Cc: kishon@ti.com, minghuan.Lian@nxp.com, jesper.nilsson@axis.com, jingoohan1@gmail.com, gustavo.pimentel@synopsys.com, hayashi.kunihiko@socionext.com, Hou Zhiqiang Subject: [PATCH 1/4] PCI: dwc: Change to use an array to store the structure of functions Date: Thu, 7 Jan 2021 17:11:20 +0800 Message-Id: <20210107091123.8616-2-Zhiqiang.Hou@nxp.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210107091123.8616-1-Zhiqiang.Hou@nxp.com> References: <20210107091123.8616-1-Zhiqiang.Hou@nxp.com> X-Originating-IP: [119.31.174.73] X-ClientProxiedBy: SG2PR06CA0085.apcprd06.prod.outlook.com (2603:1096:3:14::11) To HE1PR0402MB3371.eurprd04.prod.outlook.com (2603:10a6:7:85::27) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from localhost.localdomain (119.31.174.73) by SG2PR06CA0085.apcprd06.prod.outlook.com (2603:1096:3:14::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3742.6 via Frontend Transport; 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Array is easier and more efficient to search. Signed-off-by: Hou Zhiqiang --- .../pci/controller/dwc/pcie-designware-ep.c | 33 ++++++++----------- drivers/pci/controller/dwc/pcie-designware.h | 3 +- 2 files changed, 15 insertions(+), 21 deletions(-) diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c index bcd1cd9ba8c8..e583700b5ba3 100644 --- a/drivers/pci/controller/dwc/pcie-designware-ep.c +++ b/drivers/pci/controller/dwc/pcie-designware-ep.c @@ -34,12 +34,8 @@ EXPORT_SYMBOL_GPL(dw_pcie_ep_init_notify); struct dw_pcie_ep_func * dw_pcie_ep_get_func_from_ep(struct dw_pcie_ep *ep, u8 func_no) { - struct dw_pcie_ep_func *ep_func; - - list_for_each_entry(ep_func, &ep->func_list, list) { - if (ep_func->func_no == func_no) - return ep_func; - } + if (func_no < ep->epc->max_functions) + return ep->funcs + func_no; return NULL; } @@ -675,9 +671,9 @@ EXPORT_SYMBOL_GPL(dw_pcie_ep_init_complete); int dw_pcie_ep_init(struct dw_pcie_ep *ep) { + u8 i; int ret; void *addr; - u8 func_no; struct resource *res; struct pci_epc *epc; struct dw_pcie *pci = to_dw_pcie_from_ep(ep); @@ -685,9 +681,7 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep) struct platform_device *pdev = to_platform_device(dev); struct device_node *np = dev->of_node; const struct pci_epc_features *epc_features; - struct dw_pcie_ep_func *ep_func; - - INIT_LIST_HEAD(&ep->func_list); + struct dw_pcie_ep_func *funcs; if (!pci->dbi_base) { res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dbi"); @@ -750,18 +744,19 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep) if (ret < 0) epc->max_functions = 1; - for (func_no = 0; func_no < epc->max_functions; func_no++) { - ep_func = devm_kzalloc(dev, sizeof(*ep_func), GFP_KERNEL); - if (!ep_func) - return -ENOMEM; + funcs = devm_kcalloc(dev, epc->max_functions, sizeof(*funcs), + GFP_KERNEL); + if (!funcs) + return -ENOMEM; + + ep->funcs = funcs; - ep_func->func_no = func_no; - ep_func->msi_cap = dw_pcie_ep_find_capability(ep, func_no, + for (i = 0; i < epc->max_functions; i++) { + funcs[i].func_no = i; + funcs[i].msi_cap = dw_pcie_ep_find_capability(ep, i, PCI_CAP_ID_MSI); - ep_func->msix_cap = dw_pcie_ep_find_capability(ep, func_no, + funcs[i].msix_cap = dw_pcie_ep_find_capability(ep, i, PCI_CAP_ID_MSIX); - - list_add_tail(&ep_func->list, &ep->func_list); } if (ep->ops->ep_init) diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h index 98710bf5ab0e..16d239c4d09b 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -221,7 +221,6 @@ struct dw_pcie_ep_ops { }; struct dw_pcie_ep_func { - struct list_head list; u8 func_no; u8 msi_cap; /* MSI capability offset */ u8 msix_cap; /* MSI-X capability offset */ @@ -229,7 +228,7 @@ struct dw_pcie_ep_func { struct dw_pcie_ep { struct pci_epc *epc; - struct list_head func_list; + struct dw_pcie_ep_func *funcs; const struct dw_pcie_ep_ops *ops; phys_addr_t phys_base; size_t addr_size;