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Hou" X-Patchwork-Id: 10672071 X-Patchwork-Delegate: bhelgaas@google.com 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 A00F515A6 for ; Wed, 7 Nov 2018 10:10:01 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 88BAB2B9E0 for ; Wed, 7 Nov 2018 10:10:01 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7CED82B9EB; Wed, 7 Nov 2018 10:10:01 +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=ham 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 B34AC2B9DA for ; Wed, 7 Nov 2018 10:10:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730805AbeKGTji (ORCPT ); Wed, 7 Nov 2018 14:39:38 -0500 Received: from mail-eopbgr80071.outbound.protection.outlook.com ([40.107.8.71]:4671 "EHLO EUR04-VI1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726411AbeKGTjh (ORCPT ); Wed, 7 Nov 2018 14:39:37 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nxp.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=2U9bTI06bt+YUlAqIRHbFrMn8xSfemDHPNYsvSM4Il0=; b=oLcckoRab2RsyFciBHHO8ZMMbbvvx9l6ZULRQIGRzO4AeHZ29N3yrAzzrRbS+CEPSkXLcaX6kaXuhCuxlwFn/epDt5KMTcgYkgxr1nYXQPSRf9pnPiRNjjK2KZXflc4vybRMDtNR8z6OdhWmSyaiQ8+Yz+QC9nYbast1qh62J8Y= Received: from AM6PR04MB5781.eurprd04.prod.outlook.com (20.179.2.80) by AM6PR04MB5224.eurprd04.prod.outlook.com (20.177.35.205) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.1294.26; Wed, 7 Nov 2018 10:09:21 +0000 Received: from AM6PR04MB5781.eurprd04.prod.outlook.com ([fe80::7d93:8053:57fd:1a00]) by AM6PR04MB5781.eurprd04.prod.outlook.com ([fe80::7d93:8053:57fd:1a00%3]) with mapi id 15.20.1273.035; Wed, 7 Nov 2018 10:09:21 +0000 From: "Z.q. Hou" To: "linux-pci@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "bhelgaas@google.com" , "lorenzo.pieralisi@arm.com" , "jingoohan1@gmail.com" , "gustavo.pimentel@synopsys.com" CC: Roy Zang , Mingkai Hu , "M.h. Lian" , "Z.q. Hou" Subject: [PATCHv2 4/4] PCI: dwc: add prefetchable memory range support Thread-Topic: [PATCHv2 4/4] PCI: dwc: add prefetchable memory range support Thread-Index: AQHUdoHzO92qDxmIZkykN3HwHZxeDg== Date: Wed, 7 Nov 2018 10:09:21 +0000 Message-ID: <20181107100854.28389-5-Zhiqiang.Hou@nxp.com> References: <20181107100854.28389-1-Zhiqiang.Hou@nxp.com> In-Reply-To: <20181107100854.28389-1-Zhiqiang.Hou@nxp.com> Accept-Language: zh-CN, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: HK0PR04CA0023.apcprd04.prod.outlook.com (2603:1096:203:36::35) To AM6PR04MB5781.eurprd04.prod.outlook.com (2603:10a6:20b:aa::16) authentication-results: spf=none (sender IP is ) smtp.mailfrom=zhiqiang.hou@nxp.com; x-ms-exchange-messagesentrepresentingtype: 1 x-originating-ip: [119.31.174.73] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;AM6PR04MB5224;6:apE9Sd9R3v87v81SY+ZBMv4f/xYIAssvGz8KUCBV80URINUosd8GyrkhpLFtd0FGUYslgJYxV29h3bBgpiJUZoWW7Km3ABX7RAXwYGwdAi2JtwEVIVwS2wehKAglDEnmY9AZuBLDM2wPPIur4dMirA+japOZtd4rDE9WYNss6PwlRXtSDnUXw92l0q4yvX2xwGvDZqMC2cSnpk+zg2yKoePLzfjvPiIX5b/kdeXh9w4x7c7P92rVGhxElT4atGJQiHJiw/SdG1huLmRDeVsSAG1p8OJZximvYeis6angZnKLX/GxU38Yjrig3nlQv/v+xtsHj0bK+HpGNikMTVHHqQp8lg4U21eYip0hhYdE0zuSWY+Sm/DZjHa6p8lZH17L+bT7pPDzzSIYcVU3RGrJ9MCJZz1lwoZ35wCK3W1G36+Whf2DuCnHy4M4n4IevK87rQk4eM4TG17yUnSb7nBwfA==;5:PCqbum8TRHPub+l1TI52AbWOB0V7wLyPNtnoolO1l4ychpVr9D5Nl55zial83Q7+C48NTuhGqK3v1Zn7EhQwdZcWIQZ2D4n4yXJs1NqoZd1MSrMhgjlTzpRxMJ2hJFYHjj8PDBzDHpwBFtesRU8V2qdloi7Io/LKu1uwqQFJ31w=;7:dwOdsYHqgZFr9NHqomjbutqZ9A2GVtfjIKC4pS1CzlHOKMniveUBLaA9W7r9dKayMARpBf9X2F6HTzdkLlDAxRI75IBuJCwqgojEuHZKfW1jrIlG5al7J0bafWXHegvdNJlv3QuqXYo5gqnOJWjRkA== x-ms-office365-filtering-correlation-id: 32705812-5318-4915-c0ee-08d644991607 x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0;PCL:0;RULEID:(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600074)(711020)(4618075)(2017052603328)(7153060)(7193020);SRVR:AM6PR04MB5224; x-ms-traffictypediagnostic: AM6PR04MB5224: x-microsoft-antispam-prvs: x-exchange-antispam-report-test: UriScan:(185117386973197); x-ms-exchange-senderadcheck: 1 x-exchange-antispam-report-cfa-test: BCL:0;PCL:0;RULEID:(8211001083)(6040522)(2401047)(5005006)(8121501046)(3231382)(944501410)(52105095)(3002001)(10201501046)(93006095)(93001095)(6055026)(148016)(149066)(150057)(6041310)(201703131423095)(201702281528075)(20161123555045)(201703061421075)(201703061406153)(20161123560045)(20161123558120)(20161123562045)(20161123564045)(201708071742011)(7699051)(76991095);SRVR:AM6PR04MB5224;BCL:0;PCL:0;RULEID:;SRVR:AM6PR04MB5224; x-forefront-prvs: 08497C3D99 x-forefront-antispam-report: SFV:NSPM;SFS:(10009020)(136003)(366004)(396003)(39860400002)(376002)(346002)(189003)(199004)(71200400001)(71190400001)(39060400002)(5660300001)(305945005)(2501003)(25786009)(386003)(6506007)(6116002)(3846002)(102836004)(1076002)(8936002)(68736007)(81166006)(97736004)(81156014)(256004)(14444005)(2906002)(99286004)(186003)(66066001)(76176011)(52116002)(26005)(86362001)(54906003)(2201001)(6436002)(316002)(2900100001)(8676002)(446003)(53936002)(2616005)(486006)(11346002)(105586002)(478600001)(36756003)(106356001)(476003)(14454004)(7736002)(6512007)(110136005)(4326008)(6486002);DIR:OUT;SFP:1101;SCL:1;SRVR:AM6PR04MB5224;H:AM6PR04MB5781.eurprd04.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;MX:1;A:1; received-spf: None (protection.outlook.com: nxp.com does not designate permitted sender hosts) x-microsoft-antispam-message-info: 2YjS3ID+xvPQCwTPsdRWANl2sHSZtfwvl7FcqSWSM6Ui3vvyypkoFlLErDySbM5axd3RvkRM0/eDKkw53rijE3Pk7j4d85i4uB0rH9j7nH0wHRuZgjQVGn/dcH17Y/4DroRltrwPPAKc4pToT1JfQRer9YYgIr7JVxosDzbxAixDitQjJT0EHjR43gyHBkvSfZbLtlKMGl7q5Sap00BcaBrgBU57p/Zc4ugHhz8rC4Jv05xLixOAGmUXF1zszHM8n1/yFpPemCcUr3ZPNzSH27GITV9pph8i7YKtOwYLcz1f6611xzmKIHiefbHaVjmrOb6/3xtM/93NVTl0RY8YPsY+/kuMZQ5eMkZeH5+LISU= spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM MIME-Version: 1.0 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 32705812-5318-4915-c0ee-08d644991607 X-MS-Exchange-CrossTenant-originalarrivaltime: 07 Nov 2018 10:09:21.3178 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM6PR04MB5224 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Hou Zhiqiang The current code only support non-prefetchable memory range, as the non-prefetchable memory range must not be greater than 4GiB, one viewport can cover it, which supports upto 4GiB. To support prefetchable memory range, which is upto 64-bit memory space and can be greater than 4GiB, so we need multiple viewports. And added separate vars to store prefetchable memory range info to prevent overriding the non-prefetchable memory range info. And this patch explicitly assigned the last (if there are only 2 viewports) or last 2 viewports for CFG and I/O windows and the rests for MEM windows. Signed-off-by: Hou Zhiqiang Acked-by: Gustavo Pimentel --- V2: - Reworded the subject and commit description. - Fix the prefetchable memory range overriding non-perfetchable memory range issue by adding vars to store prefetchable memory range info. .../pci/controller/dwc/pcie-designware-host.c | 107 ++++++++++++++---- drivers/pci/controller/dwc/pcie-designware.h | 7 ++ 2 files changed, 95 insertions(+), 19 deletions(-) diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c index ecacce016489..328aa40a6609 100644 --- a/drivers/pci/controller/dwc/pcie-designware-host.c +++ b/drivers/pci/controller/dwc/pcie-designware-host.c @@ -346,6 +346,35 @@ int dw_pcie_host_init(struct pcie_port *pp) dev_err(dev, "Missing *config* reg space\n"); } + /* + * If vendor's platform driver has set the num_viewport and it is + * not less than 2, skip getting the num_viewport from DT here. + */ + if (pci->num_viewport < 2) { + ret = of_property_read_u32(np, "num-viewport", + &pci->num_viewport); + if (ret || pci->num_viewport < 2) + pci->num_viewport = 2; + } + + /* + * if there are only 2 viewports, assign the last viewport for + * both CFG and IO window, otherwise assign the last 2 viewport + * for CFG and IO window specific. And the rest viewports are + * assigned to MEM windows. + */ + if (pci->num_viewport == 2) { + pp->cfg_idx = pp->io_idx = PCIE_ATU_REGION_INDEX1; + pp->mem_wins = 1; + } else { + pp->cfg_idx = pci->num_viewport - 1; + pp->io_idx = pci->num_viewport - 2; + pp->mem_wins = pci->num_viewport - 2; + } + + dev_dbg(dev, "CFG win id: %d, I/O win id: %d, Total MEM win: %d\n", + pp->cfg_idx, pp->io_idx, pp->mem_wins); + bridge = pci_alloc_host_bridge(0); if (!bridge) return -ENOMEM; @@ -377,10 +406,20 @@ int dw_pcie_host_init(struct pcie_port *pp) } break; case IORESOURCE_MEM: - pp->mem = win->res; - pp->mem->name = "MEM"; - pp->mem_size = resource_size(pp->mem); - pp->mem_bus_addr = pp->mem->start - win->offset; + if (win->res->flags & IORESOURCE_PREFETCH) { + pp->mem_perf = win->res; + pp->mem_perf->name = "MEM perf"; + pp->mem_perf_size = resource_size(pp->mem_perf); + pp->mem_perf_bus_addr = pp->mem_perf->start - + win->offset; + pp->mem_perf_base = pp->mem_perf->start; + } else { + pp->mem = win->res; + pp->mem->name = "MEM"; + pp->mem_size = resource_size(pp->mem); + pp->mem_bus_addr = pp->mem->start - win->offset; + pp->mem_base = pp->mem->start; + } break; case 0: pp->cfg = win->res; @@ -406,8 +445,6 @@ int dw_pcie_host_init(struct pcie_port *pp) } } - pp->mem_base = pp->mem->start; - if (!pp->va_cfg0_base) { pp->va_cfg0_base = devm_pci_remap_cfgspace(dev, pp->cfg0_base, pp->cfg0_size); @@ -534,12 +571,12 @@ static int dw_pcie_rd_other_conf(struct pcie_port *pp, struct pci_bus *bus, va_cfg_base = pp->va_cfg1_base; } - dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX1, + dw_pcie_prog_outbound_atu(pci, pp->cfg_idx, type, cpu_addr, busdev, cfg_size); ret = dw_pcie_read(va_cfg_base + where, size, val); - if (pci->num_viewport <= 2) - dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX1, + if (pp->cfg_idx == pp->io_idx) + dw_pcie_prog_outbound_atu(pci, pp->io_idx, PCIE_ATU_TYPE_IO, pp->io_base, pp->io_bus_addr, pp->io_size); @@ -573,12 +610,12 @@ static int dw_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus, va_cfg_base = pp->va_cfg1_base; } - dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX1, + dw_pcie_prog_outbound_atu(pci, pp->cfg_idx, type, cpu_addr, busdev, cfg_size); ret = dw_pcie_write(va_cfg_base + where, size, val); - if (pci->num_viewport <= 2) - dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX1, + if (pp->cfg_idx == pp->io_idx) + dw_pcie_prog_outbound_atu(pci, pp->io_idx, PCIE_ATU_TYPE_IO, pp->io_base, pp->io_bus_addr, pp->io_size); @@ -652,6 +689,9 @@ static u8 dw_pcie_iatu_unroll_enabled(struct dw_pcie *pci) void dw_pcie_setup_rc(struct pcie_port *pp) { u32 val, ctrl, num_ctrls; + u64 remain_size, base, win_size; + phys_addr_t bus_addr; + int i; struct dw_pcie *pci = to_dw_pcie_from_pp(pp); dw_pcie_setup(pci); @@ -700,13 +740,42 @@ void dw_pcie_setup_rc(struct pcie_port *pp) dev_dbg(pci->dev, "iATU unroll: %s\n", pci->iatu_unroll_enabled ? "enabled" : "disabled"); - dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX0, - PCIE_ATU_TYPE_MEM, pp->mem_base, - pp->mem_bus_addr, pp->mem_size); - if (pci->num_viewport > 2) - dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX2, - PCIE_ATU_TYPE_IO, pp->io_base, - pp->io_bus_addr, pp->io_size); + /* + * The maximum region size is 4 GB, and a region + * must not cross a 4 GB boundary. + */ + win_size = SZ_4G - (pp->mem_base & (SZ_4G - 1)); + win_size = min(win_size, pp->mem_size); + dw_pcie_prog_outbound_atu(pci, 0, PCIE_ATU_TYPE_MEM, + pp->mem_base, pp->mem_bus_addr, + win_size); + dev_dbg(pci->dev, + "iATU: non-pref MEM: win = %d: base = %llx, bus_addr = %pa, size = %llx\n", + 0, pp->mem_base, &pp->mem_bus_addr, win_size); + + /* Prefetchable range can be 64bit space */ + remain_size = pp->mem_perf_size; + base = pp->mem_perf_base; + bus_addr = pp->mem_perf_bus_addr; + for (i = 1; remain_size > 0 && i < pp->mem_wins; i++) { + win_size = SZ_4G - (base & (SZ_4G - 1)); + win_size = min(win_size, remain_size); + dw_pcie_prog_outbound_atu(pci, i, PCIE_ATU_TYPE_MEM, + base, bus_addr, win_size); + dev_dbg(pci->dev, "iATU: pref MEM: win = %d: base = %llx, bus_addr = %pa, size = %llx\n", + i, base, &bus_addr, win_size); + + base += win_size; + bus_addr += win_size; + remain_size -= win_size; + } + + if (remain_size > 0) + dev_info(pci->dev, "iATU: MEM window isn't enough\n"); + + dw_pcie_prog_outbound_atu(pci, pp->io_idx, PCIE_ATU_TYPE_IO, + pp->io_base, pp->io_bus_addr, + pp->io_size); } dw_pcie_wr_own_conf(pp, PCI_BASE_ADDRESS_0, 4, 0); diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h index a438c3879aa9..0197f67f82b7 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -148,15 +148,22 @@ struct pcie_port { u64 cfg1_base; void __iomem *va_cfg1_base; u32 cfg1_size; + u32 cfg_idx; resource_size_t io_base; phys_addr_t io_bus_addr; u32 io_size; + u32 io_idx; u64 mem_base; phys_addr_t mem_bus_addr; u64 mem_size; + u64 mem_perf_base; + phys_addr_t mem_perf_bus_addr; + u64 mem_perf_size; + u32 mem_wins; struct resource *cfg; struct resource *io; struct resource *mem; + struct resource *mem_perf; struct resource *busn; int irq; const struct dw_pcie_host_ops *ops;