From patchwork Mon Oct 7 04:12:12 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 13824022 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E4760CFB440 for ; Mon, 7 Oct 2024 04:12:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=313osswb+vb9uu0b+5JqPD+5m2+l7kEXn7/eA+sGB8M=; b=vQFWy78QWXFRtH 40sdeC5nMmmAnhB2P9RfHTbZc2fV2B9fgif6JL0o3y5rtUGlHlNziB6mRjTX9OlwHVTA+gy6cypPj V2J30XQyZGBqtU3uhrVycBCc4dVm5fnc1Ye0v52BTDU6V5gvwOkuBI2ow2LVOiDL/GfXpbzPrvOrm rXZDd/LI/8AVaOqAONRwTbT79EIJtN5tRs+B9Ekh0fDsgLlWbc1BSNeRLwxVK4V712hzo6Fu/S+0q wNnttetHaDIb4fCh1Nzf4L6z3hFGnQLaeo7lYEDhwahm9Jd1xX6KigFmIeSDGES1uHwEw4VQlV/xo 0+hxsT967bi17WiGm2eg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1sxf6u-00000001D6l-3VME; Mon, 07 Oct 2024 04:12:40 +0000 Received: from nyc.source.kernel.org ([2604:1380:45d1:ec00::3]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1sxf6q-00000001D24-1Skc for linux-rockchip@lists.infradead.org; Mon, 07 Oct 2024 04:12:39 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by nyc.source.kernel.org (Postfix) with ESMTP id 0D61AA414EC; Mon, 7 Oct 2024 04:12:27 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6E343C4CED1; Mon, 7 Oct 2024 04:12:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1728274355; bh=TsqGV75FVnyIunhX2UHg/pvAV3kchHT+z+/uEhq7AqE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Asey4TTgZYC4eJ08MQFDZI0Xf2uT6glqWRHboIlMR9nwru1MnVEKzurINTCcbdImi xo2XDevTYWe54qbgAQcqBitHHLVZnKq7Gj7iMEGndPcdo807zApJXkhRDRthsy0NA+ 7U5NjxAjmIRSkaV04OFMgYA8FkDHFG6rUJasOlU/vXCqiXUrZCHhPgUrvaEX8nmN/J 0KbFqFfDAgybIOi9ylqG5z3L8HGudbP54AqPxFxTO1KJYcn0GEPynXbF5PNW4E5OIf JxmhW+IhCyDUeANL3izqcUHUimWvE1M0qW73pIXLNyattkJv/aexT2M5ApIw2PGoua A49B4HVNALpyA== From: Damien Le Moal To: Manivannan Sadhasivam , Lorenzo Pieralisi , Kishon Vijay Abraham I , Shawn Lin , =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= , Bjorn Helgaas , Heiko Stuebner , linux-pci@vger.kernel.org, Rob Herring , Krzysztof Kozlowski , Conor Dooley , devicetree@vger.kernel.org Cc: linux-rockchip@lists.infradead.org, Rick Wertenbroek , Wilfred Mallawa , Niklas Cassel Subject: [PATCH v3 06/12] PCI: rockchip-ep: Refactor rockchip_pcie_ep_probe() memory allocations Date: Mon, 7 Oct 2024 13:12:12 +0900 Message-ID: <20241007041218.157516-7-dlemoal@kernel.org> X-Mailer: git-send-email 2.46.2 In-Reply-To: <20241007041218.157516-1-dlemoal@kernel.org> References: <20241007041218.157516-1-dlemoal@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241006_211236_750416_31C65C44 X-CRM114-Status: GOOD ( 19.72 ) X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org Introduce the function rockchip_pcie_ep_get_resources() to parse the DT node of a rockchip PCIe endpoint controller and allocate the outbound memory region and memory needed for IRQ handling. This function tidies up rockchip_pcie_ep_probe(). No functional change. Signed-off-by: Damien Le Moal --- drivers/pci/controller/pcie-rockchip-ep.c | 109 ++++++++++++---------- 1 file changed, 62 insertions(+), 47 deletions(-) diff --git a/drivers/pci/controller/pcie-rockchip-ep.c b/drivers/pci/controller/pcie-rockchip-ep.c index a9b319d4e507..523e9cdfd241 100644 --- a/drivers/pci/controller/pcie-rockchip-ep.c +++ b/drivers/pci/controller/pcie-rockchip-ep.c @@ -524,15 +524,70 @@ static const struct of_device_id rockchip_pcie_ep_of_match[] = { {}, }; +static int rockchip_pcie_ep_get_resources(struct rockchip_pcie_ep *ep) +{ + struct rockchip_pcie *rockchip = &ep->rockchip; + struct device *dev = rockchip->dev; + struct pci_epc_mem_window *windows = NULL; + int err, i; + + err = rockchip_pcie_parse_ep_dt(rockchip, ep); + if (err) + return err; + + ep->ob_addr = devm_kcalloc(dev, ep->max_regions, sizeof(*ep->ob_addr), + GFP_KERNEL); + + if (!ep->ob_addr) + return -ENOMEM; + + windows = devm_kcalloc(dev, ep->max_regions, + sizeof(struct pci_epc_mem_window), GFP_KERNEL); + if (!windows) + return -ENOMEM; + + for (i = 0; i < ep->max_regions; i++) { + windows[i].phys_base = rockchip->mem_res->start + (SZ_1M * i); + windows[i].size = SZ_1M; + windows[i].page_size = SZ_1M; + } + err = pci_epc_multi_mem_init(ep->epc, windows, ep->max_regions); + devm_kfree(dev, windows); + + if (err < 0) { + dev_err(dev, "failed to initialize the memory space\n"); + return err; + } + + ep->irq_cpu_addr = pci_epc_mem_alloc_addr(ep->epc, &ep->irq_phys_addr, + SZ_1M); + if (!ep->irq_cpu_addr) { + dev_err(dev, "failed to reserve memory space for MSI\n"); + goto err_epc_mem_exit; + } + + ep->irq_pci_addr = ROCKCHIP_PCIE_EP_DUMMY_IRQ_ADDR; + + return 0; + +err_epc_mem_exit: + pci_epc_mem_exit(ep->epc); + + return err; +} + +static void rockchip_pcie_ep_release_resources(struct rockchip_pcie_ep *ep) +{ + pci_epc_mem_exit(ep->epc); +} + static int rockchip_pcie_ep_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct rockchip_pcie_ep *ep; struct rockchip_pcie *rockchip; struct pci_epc *epc; - size_t max_regions; - struct pci_epc_mem_window *windows = NULL; - int err, i; + int err; u32 cfg_msi, cfg_msix_cp; ep = devm_kzalloc(dev, sizeof(*ep), GFP_KERNEL); @@ -552,13 +607,13 @@ static int rockchip_pcie_ep_probe(struct platform_device *pdev) ep->epc = epc; epc_set_drvdata(epc, ep); - err = rockchip_pcie_parse_ep_dt(rockchip, ep); + err = rockchip_pcie_ep_get_resources(ep); if (err) return err; err = rockchip_pcie_enable_clocks(rockchip); if (err) - return err; + goto err_release_resources; err = rockchip_pcie_init_port(rockchip); if (err) @@ -568,47 +623,9 @@ static int rockchip_pcie_ep_probe(struct platform_device *pdev) rockchip_pcie_write(rockchip, PCIE_CLIENT_LINK_TRAIN_ENABLE, PCIE_CLIENT_CONFIG); - max_regions = ep->max_regions; - ep->ob_addr = devm_kcalloc(dev, max_regions, sizeof(*ep->ob_addr), - GFP_KERNEL); - - if (!ep->ob_addr) { - err = -ENOMEM; - goto err_uninit_port; - } - /* Only enable function 0 by default */ rockchip_pcie_write(rockchip, BIT(0), PCIE_CORE_PHY_FUNC_CFG); - windows = devm_kcalloc(dev, ep->max_regions, - sizeof(struct pci_epc_mem_window), GFP_KERNEL); - if (!windows) { - err = -ENOMEM; - goto err_uninit_port; - } - for (i = 0; i < ep->max_regions; i++) { - windows[i].phys_base = rockchip->mem_res->start + (SZ_1M * i); - windows[i].size = SZ_1M; - windows[i].page_size = SZ_1M; - } - err = pci_epc_multi_mem_init(epc, windows, ep->max_regions); - devm_kfree(dev, windows); - - if (err < 0) { - dev_err(dev, "failed to initialize the memory space\n"); - goto err_uninit_port; - } - - ep->irq_cpu_addr = pci_epc_mem_alloc_addr(epc, &ep->irq_phys_addr, - SZ_1M); - if (!ep->irq_cpu_addr) { - dev_err(dev, "failed to reserve memory space for MSI\n"); - err = -ENOMEM; - goto err_epc_mem_exit; - } - - ep->irq_pci_addr = ROCKCHIP_PCIE_EP_DUMMY_IRQ_ADDR; - /* * MSI-X is not supported but the controller still advertises the MSI-X * capability by default, which can lead to the Root Complex side @@ -638,10 +655,8 @@ static int rockchip_pcie_ep_probe(struct platform_device *pdev) pci_epc_init_notify(epc); return 0; -err_epc_mem_exit: - pci_epc_mem_exit(epc); -err_uninit_port: - rockchip_pcie_deinit_phys(rockchip); +err_release_resources: + rockchip_pcie_ep_release_resources(ep); err_disable_clocks: rockchip_pcie_disable_clocks(rockchip); return err;