From patchwork Thu Jan 26 13:50:46 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rick Wertenbroek X-Patchwork-Id: 13117119 X-Patchwork-Delegate: lorenzo.pieralisi@arm.com 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 22A41C05027 for ; Thu, 26 Jan 2023 13:53:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231611AbjAZNxS (ORCPT ); Thu, 26 Jan 2023 08:53:18 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44140 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231921AbjAZNxE (ORCPT ); Thu, 26 Jan 2023 08:53:04 -0500 Received: from mail-ed1-x535.google.com (mail-ed1-x535.google.com [IPv6:2a00:1450:4864:20::535]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D69F96FD14; Thu, 26 Jan 2023 05:52:44 -0800 (PST) Received: by mail-ed1-x535.google.com with SMTP id fi26so1902162edb.7; Thu, 26 Jan 2023 05:52:44 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=6r/M96HQ6mJOydikE9ZGICn1o9EE2Mcz4TRYdGEXn8Q=; b=TyW6NLtJ8v5kmKG2BGe12U4KSK9TECeMv9jubJzHBJ0TjOQ/q2LLvbWkYas9HW8dGk cpa3ySn2q6qKJJg3BCyqE1mZttvkF5necoQ7uGlzrbTvBXGV1wgUU7S4JJQS7qhDtsMA zsINNCPvcHKGurQT0TsAxCG1xINVM8a6dU9myMA643KiqKa10HwdiQgLjq9l5JG2hfLL VJbi/zrma4LMLfWm7Wu3M+wF4bonLVLwg/EW8cU9ruyfREbxjNu2b7FpILGWJ4/pMx9C CBhf67sF/RMQ9C+lTX4tsu8hkmyMhs+UoMjhCWg535hSL6gRCz8w7+4cOuxp2A/x4oLY DM7g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=6r/M96HQ6mJOydikE9ZGICn1o9EE2Mcz4TRYdGEXn8Q=; b=vOCI29PtqED+GNQq9Nh5C8DDKzJ0titCxYPQrqfVFc4cR7l4Ftr2tFWuDwykLdIpxT rxBKO2EkpKbC7+96VIxlIZ3wwvkUs4F6P6wIPFhjpd21myyb+DIGfxTRooJQen2j1zEC AODZPu5nH7zdiOvSTwO5lov+nbJwkgv4zS1B4bv87WPbsME2KCRdVSZWh5uF1axwBXzh F5SPFacjZa8/UWsl/iO1xbUhfiL4YJ3+eks+2bwcqKiNYBBqGECWTG7Cj4SsRWArJcpd NvIG5C9JvFP4Y3ThuYpq+dgZWvTDUXHHOsbQR94YwiV7sXEKHOma1bopmN+SCyDcTiQQ PTMg== X-Gm-Message-State: AO0yUKUhP2wb7IcEt8y3INRyoNwz/+/yT3WPU5b80yCQf0Ym4/pMFwj2 6cv4qNfncaztlcwOKNPOM0k= X-Google-Smtp-Source: AK7set9ZDtLOSbKu0u8jvVMmA7AG7TgSoLpJ+4v8nul7Tr0tSupEGmENIbcIwVO7QeZZjqi8o9nBPw== X-Received: by 2002:aa7:cfc5:0:b0:4a0:b978:4533 with SMTP id r5-20020aa7cfc5000000b004a0b9784533mr3320734edy.32.1674741163011; Thu, 26 Jan 2023 05:52:43 -0800 (PST) Received: from A13PC04R.einet.ad.eivd.ch ([193.134.219.72]) by smtp.googlemail.com with ESMTPSA id t15-20020a508d4f000000b004a0e2fe619esm591611edt.39.2023.01.26.05.52.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 26 Jan 2023 05:52:42 -0800 (PST) From: Rick Wertenbroek To: alberto.dassatti@heig-vd.ch Cc: xxm@rock-chips.com, wenrui.li@rock-chips.com, rick.wertenbroek@heig-vd.ch, Rick Wertenbroek , Rob Herring , Krzysztof Kozlowski , Heiko Stuebner , Shawn Lin , Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy=C5=84?= =?utf-8?q?ski?= , Bjorn Helgaas , Jani Nikula , Rodrigo Vivi , Mikko Kovanen , Greg Kroah-Hartman , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org Subject: [PATCH 6/8] PCI: rockchip: Fixed window mapping and address translation for endpoint Date: Thu, 26 Jan 2023 14:50:46 +0100 Message-Id: <20230126135049.708524-7-rick.wertenbroek@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230126135049.708524-1-rick.wertenbroek@gmail.com> References: <20230126135049.708524-1-rick.wertenbroek@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org The RK3399 PCI EP core has 33 windows for PCIe space, here in the driver up to 32 fixed size (1M) windows are used and pages are allocated / mapped accordingly. The driver first used a single window and allocated space inside which caused translation issues (between CPU space and PCI space) because a window can only have a single translation at a given time, which if multiple regions are allocated inside will cause conflicts. Now each window is a single region of 1M which will always guarantee that the translation is not in conflict. Signed-off-by: Rick Wertenbroek --- drivers/pci/controller/pcie-rockchip-ep.c | 62 ++++++++++++----------- drivers/pci/controller/pcie-rockchip.h | 25 ++++----- 2 files changed, 46 insertions(+), 41 deletions(-) diff --git a/drivers/pci/controller/pcie-rockchip-ep.c b/drivers/pci/controller/pcie-rockchip-ep.c index 4c84e403e..a682a941d 100644 --- a/drivers/pci/controller/pcie-rockchip-ep.c +++ b/drivers/pci/controller/pcie-rockchip-ep.c @@ -76,11 +76,17 @@ static void rockchip_pcie_prog_ep_ob_atu(struct rockchip_pcie *rockchip, u8 fn, if (num_pass_bits < 8) num_pass_bits = 8; - cpu_addr -= rockchip->mem_res->start; - addr0 = ((is_nor_msg ? 0x10 : (num_pass_bits - 1)) & - PCIE_CORE_OB_REGION_ADDR0_NUM_BITS) | - (lower_32_bits(cpu_addr) & PCIE_CORE_OB_REGION_ADDR0_LO_ADDR); - addr1 = upper_32_bits(is_nor_msg ? cpu_addr : pci_addr); + if (is_nor_msg) { + dev_warn(rockchip->dev, "NOR MSG\n"); + cpu_addr -= rockchip->mem_res->start; + addr0 = (0x10 & PCIE_CORE_OB_REGION_ADDR0_NUM_BITS) | + (lower_32_bits(cpu_addr) & PCIE_CORE_OB_REGION_ADDR0_LO_ADDR); + addr1 = upper_32_bits(cpu_addr); + } else { + addr0 = (num_pass_bits & PCIE_CORE_OB_REGION_ADDR0_NUM_BITS) | + (lower_32_bits(pci_addr) & PCIE_CORE_OB_REGION_ADDR0_LO_ADDR); + addr1 = upper_32_bits(pci_addr); + } desc0 = ROCKCHIP_PCIE_AT_OB_REGION_DESC0_DEVFN(fn) | type; desc1 = 0; @@ -103,12 +109,6 @@ static void rockchip_pcie_prog_ep_ob_atu(struct rockchip_pcie *rockchip, u8 fn, ROCKCHIP_PCIE_AT_OB_REGION_DESC0(r)); rockchip_pcie_write(rockchip, desc1, ROCKCHIP_PCIE_AT_OB_REGION_DESC1(r)); - - addr0 = - ((num_pass_bits - 1) & PCIE_CORE_OB_REGION_ADDR0_NUM_BITS) | - (lower_32_bits(cpu_addr) & - PCIE_CORE_OB_REGION_ADDR0_LO_ADDR); - addr1 = upper_32_bits(cpu_addr); } } @@ -256,15 +256,7 @@ static int rockchip_pcie_ep_map_addr(struct pci_epc *epc, u8 fn, u8 vfn, struct rockchip_pcie *pcie = &ep->rockchip; u32 r; - r = find_first_zero_bit(&ep->ob_region_map, BITS_PER_LONG); - /* - * Region 0 is reserved for configuration space and shouldn't - * be used elsewhere per TRM, so leave it out. - */ - if (r >= ep->max_regions - 1) { - dev_err(&epc->dev, "no free outbound region\n"); - return -EINVAL; - } + r = (addr >> ilog2(SZ_1M)) & 0x1f; rockchip_pcie_prog_ep_ob_atu(pcie, fn, r, AXI_WRAPPER_MEM_WRITE, addr, pci_addr, size); @@ -282,15 +274,11 @@ static void rockchip_pcie_ep_unmap_addr(struct pci_epc *epc, u8 fn, u8 vfn, struct rockchip_pcie *rockchip = &ep->rockchip; u32 r; - for (r = 0; r < ep->max_regions - 1; r++) + for (r = 0; r < ep->max_regions; r++) if (ep->ob_addr[r] == addr) break; - /* - * Region 0 is reserved for configuration space and shouldn't - * be used elsewhere per TRM, so leave it out. - */ - if (r == ep->max_regions - 1) + if (r == ep->max_regions) return; rockchip_pcie_clear_ep_ob_atu(rockchip, r); @@ -539,6 +527,8 @@ static int rockchip_pcie_parse_ep_dt(struct rockchip_pcie *rockchip, if (err < 0 || ep->max_regions > MAX_REGION_LIMIT) ep->max_regions = MAX_REGION_LIMIT; + ep->ob_region_map = 0; + err = of_property_read_u8(dev->of_node, "max-functions", &ep->epc->max_functions); if (err < 0) @@ -559,7 +549,10 @@ static int rockchip_pcie_ep_probe(struct platform_device *pdev) struct rockchip_pcie *rockchip; struct pci_epc *epc; size_t max_regions; + struct pci_epc_mem_window *windows = NULL; int err; + u32 cfg; + int i; ep = devm_kzalloc(dev, sizeof(*ep), GFP_KERNEL); if (!ep) @@ -606,15 +599,26 @@ static int rockchip_pcie_ep_probe(struct platform_device *pdev) /* Only enable function 0 by default */ rockchip_pcie_write(rockchip, BIT(0), PCIE_CORE_PHY_FUNC_CFG); - err = pci_epc_mem_init(epc, rockchip->mem_res->start, - resource_size(rockchip->mem_res), PAGE_SIZE); + 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_128K); + SZ_1M); if (!ep->irq_cpu_addr) { dev_err(dev, "failed to reserve memory space for MSI\n"); err = -ENOMEM; diff --git a/drivers/pci/controller/pcie-rockchip.h b/drivers/pci/controller/pcie-rockchip.h index f3a5ff1cf..72e427a0f 100644 --- a/drivers/pci/controller/pcie-rockchip.h +++ b/drivers/pci/controller/pcie-rockchip.h @@ -134,6 +134,7 @@ #define PCIE_RC_RP_ATS_BASE 0x400000 #define PCIE_RC_CONFIG_NORMAL_BASE 0x800000 +#define PCIE_EP_PF_CONFIG_REGS_BASE 0x800000 #define PCIE_RC_CONFIG_BASE 0xa00000 #define PCIE_EP_CONFIG_BASE 0xa00000 #define PCIE_EP_CONFIG_DID_VID (PCIE_EP_CONFIG_BASE + 0x00) @@ -228,13 +229,14 @@ #define ROCKCHIP_PCIE_EP_MSI_CTRL_MASK_MSI_CAP BIT(24) #define ROCKCHIP_PCIE_EP_DUMMY_IRQ_ADDR 0x1 #define ROCKCHIP_PCIE_EP_PCI_LEGACY_IRQ_ADDR 0x3 -#define ROCKCHIP_PCIE_EP_FUNC_BASE(fn) (((fn) << 12) & GENMASK(19, 12)) +#define ROCKCHIP_PCIE_EP_FUNC_BASE(fn) \ + (PCIE_EP_PF_CONFIG_REGS_BASE + (((fn) << 12) & GENMASK(19, 12))) +#define ROCKCHIP_PCIE_EP_VIRT_FUNC_BASE(fn) \ + (PCIE_EP_PF_CONFIG_REGS_BASE + 0x10000 + (((fn) << 12) & GENMASK(19, 12))) #define ROCKCHIP_PCIE_AT_IB_EP_FUNC_BAR_ADDR0(fn, bar) \ - (PCIE_RC_RP_ATS_BASE + 0x0840 + (fn) * 0x0040 + (bar) * 0x0008) + (PCIE_CORE_AXI_CONF_BASE + 0x0828 + (fn) * 0x0040 + (bar) * 0x0008) #define ROCKCHIP_PCIE_AT_IB_EP_FUNC_BAR_ADDR1(fn, bar) \ - (PCIE_RC_RP_ATS_BASE + 0x0844 + (fn) * 0x0040 + (bar) * 0x0008) -#define ROCKCHIP_PCIE_AT_OB_REGION_PCI_ADDR0(r) \ - (PCIE_RC_RP_ATS_BASE + 0x0000 + ((r) & 0x1f) * 0x0020) + (PCIE_CORE_AXI_CONF_BASE + 0x082c + (fn) * 0x0040 + (bar) * 0x0008) #define ROCKCHIP_PCIE_AT_OB_REGION_PCI_ADDR0_DEVFN_MASK GENMASK(19, 12) #define ROCKCHIP_PCIE_AT_OB_REGION_PCI_ADDR0_DEVFN(devfn) \ (((devfn) << 12) & \ @@ -242,20 +244,19 @@ #define ROCKCHIP_PCIE_AT_OB_REGION_PCI_ADDR0_BUS_MASK GENMASK(27, 20) #define ROCKCHIP_PCIE_AT_OB_REGION_PCI_ADDR0_BUS(bus) \ (((bus) << 20) & ROCKCHIP_PCIE_AT_OB_REGION_PCI_ADDR0_BUS_MASK) +#define PCIE_RC_EP_ATR_OB_REGIONS_1_32 (PCIE_CORE_AXI_CONF_BASE + 0x0020) +#define ROCKCHIP_PCIE_AT_OB_REGION_PCI_ADDR0(r) \ + (PCIE_RC_EP_ATR_OB_REGIONS_1_32 + 0x0000 + ((r) & 0x1f) * 0x0020) #define ROCKCHIP_PCIE_AT_OB_REGION_PCI_ADDR1(r) \ - (PCIE_RC_RP_ATS_BASE + 0x0004 + ((r) & 0x1f) * 0x0020) + (PCIE_RC_EP_ATR_OB_REGIONS_1_32 + 0x0004 + ((r) & 0x1f) * 0x0020) #define ROCKCHIP_PCIE_AT_OB_REGION_DESC0_HARDCODED_RID BIT(23) #define ROCKCHIP_PCIE_AT_OB_REGION_DESC0_DEVFN_MASK GENMASK(31, 24) #define ROCKCHIP_PCIE_AT_OB_REGION_DESC0_DEVFN(devfn) \ (((devfn) << 24) & ROCKCHIP_PCIE_AT_OB_REGION_DESC0_DEVFN_MASK) #define ROCKCHIP_PCIE_AT_OB_REGION_DESC0(r) \ - (PCIE_RC_RP_ATS_BASE + 0x0008 + ((r) & 0x1f) * 0x0020) + (PCIE_RC_EP_ATR_OB_REGIONS_1_32 + 0x0008 + ((r) & 0x1f) * 0x0020) #define ROCKCHIP_PCIE_AT_OB_REGION_DESC1(r) \ - (PCIE_RC_RP_ATS_BASE + 0x000c + ((r) & 0x1f) * 0x0020) -#define ROCKCHIP_PCIE_AT_OB_REGION_CPU_ADDR0(r) \ - (PCIE_RC_RP_ATS_BASE + 0x0018 + ((r) & 0x1f) * 0x0020) -#define ROCKCHIP_PCIE_AT_OB_REGION_CPU_ADDR1(r) \ - (PCIE_RC_RP_ATS_BASE + 0x001c + ((r) & 0x1f) * 0x0020) + (PCIE_RC_EP_ATR_OB_REGIONS_1_32 + 0x000c + ((r) & 0x1f) * 0x0020) #define ROCKCHIP_PCIE_CORE_EP_FUNC_BAR_CFG0(fn) \ (PCIE_CORE_CTRL_MGMT_BASE + 0x0240 + (fn) * 0x0008)