From patchwork Thu May 14 13:16:37 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiaxun Yang X-Patchwork-Id: 11548683 X-Patchwork-Delegate: lorenzo.pieralisi@arm.com Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 89A1714C0 for ; Thu, 14 May 2020 13:17:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 716402073E for ; Thu, 14 May 2020 13:17:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=flygoat.com header.i=@flygoat.com header.b="gXvAIxvL" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726245AbgENNRG (ORCPT ); Thu, 14 May 2020 09:17:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52286 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1726073AbgENNRG (ORCPT ); Thu, 14 May 2020 09:17:06 -0400 Received: from vultr.net.flygoat.com (vultr.net.flygoat.com [IPv6:2001:19f0:6001:3633:5400:2ff:fe8c:553]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 81B50C061A0C; Thu, 14 May 2020 06:17:06 -0700 (PDT) Received: from localhost.localdomain (unknown [142.147.94.151]) by vultr.net.flygoat.com (Postfix) with ESMTPSA id DC1E3204A0; Thu, 14 May 2020 13:17:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=flygoat.com; s=vultr; t=1589462224; bh=eJnR5u9wxpZzi1TozIj3O/mYN+6KO3jlz58PZP+YVW4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=gXvAIxvLBuHh696jacAGYaWXey/BbIiqdtCmSYadB42UAMhSyLWCMnk2xz+0LMbl7 ODin41yuW7vVdp8+oir6nwnlm2nzvxTxZtS8ss6CYFy5zRzfjr6XQ+Queylt/AXK0C GjQ/wbM3diHotnI8KcyQE9mt5Qg3HdhkYOVPZI6re8Krxsp1ao5iS967GBMm7Rt/mz YCysd8z+ztESRmBIvQ8O0iEOqZsgJb/9Hw7sRg1WeAVhJWd7xUFXaL7c3ZNXgkEgxx gb3JA3PNowlHbesLYNcld8YbqyOtR2xTSdaytO7XM9cVmQiYC070eJjCXmGyDgSKJu o0j0c0GZsRRFA== From: Jiaxun Yang To: linux-pci@vger.kernel.org Cc: Jiaxun Yang , Bjorn Helgaas , Bjorn Helgaas , Rob Herring , Thomas Bogendoerfer , Huacai Chen , Lorenzo Pieralisi , Paul Burton , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org Subject: [PATCH v10 1/5] PCI: Don't disable decoding when mmio_always_on is set Date: Thu, 14 May 2020 21:16:37 +0800 Message-Id: <20200514131650.3587281-1-jiaxun.yang@flygoat.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200427060551.1372591-1-jiaxun.yang@flygoat.com> References: <20200427060551.1372591-1-jiaxun.yang@flygoat.com> MIME-Version: 1.0 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Don't disable MEM/IO decoding when a device have both non_compliant_bars and mmio_always_on. That would allow us quirk devices with junk in BARs but can't disable their decoding. Signed-off-by: Jiaxun Yang Acked-by: Bjorn Helgaas --- drivers/pci/probe.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 77b8a145c39b..d9c2c3301a8a 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -1822,7 +1822,7 @@ int pci_setup_device(struct pci_dev *dev) /* Device class may be changed after fixup */ class = dev->class >> 8; - if (dev->non_compliant_bars) { + if (dev->non_compliant_bars && !dev->mmio_always_on) { pci_read_config_word(dev, PCI_COMMAND, &cmd); if (cmd & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) { pci_info(dev, "device has non-compliant BARs; disabling IO/MEM decoding\n"); From patchwork Thu May 14 13:16:38 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiaxun Yang X-Patchwork-Id: 11548685 X-Patchwork-Delegate: lorenzo.pieralisi@arm.com Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 751AF138A for ; Thu, 14 May 2020 13:17:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5030320728 for ; Thu, 14 May 2020 13:17:18 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=flygoat.com header.i=@flygoat.com header.b="un3liaxe" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727072AbgENNRR (ORCPT ); Thu, 14 May 2020 09:17:17 -0400 Received: from vultr.net.flygoat.com ([149.28.68.211]:33600 "EHLO vultr.net.flygoat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726073AbgENNRR (ORCPT ); Thu, 14 May 2020 09:17:17 -0400 Received: from localhost.localdomain (unknown [142.147.94.151]) by vultr.net.flygoat.com (Postfix) with ESMTPSA id 24EF7204A1; Thu, 14 May 2020 13:17:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=flygoat.com; s=vultr; t=1589462236; bh=cvTTwte27Z8CxXF0QGz5SRZbG9b9q/XCWGjTkTZlCHc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=un3liaxenPPEb0xfUPr62GopGqDeGUIuz2MGnFOGixjw6CV5QFq/JQCR2Dn/t32yw 3bmWx+s/465fJZ2C7L43VTGT5bZgsAPuumun5SlhUWh7cl6u9TD7oOtPPDi8PRlCM0 H9H7V30Y6Ir6+cemsy3g5ANTnOehVDraZATDAewKHfID7elKjUAxply/ZQ8ZcQCVA/ zpQORTZ8N/673jaPqpDYD5CUYVQ2h/cELpDm86RUsuttAvkQFaHaUy4Evs5RiPqM54 SmMJltwJ++OSHoFOTJqxnVP+asiaTBmAlsYafXcmia1oCA1ynu0gnaC1pvuaV8h7ID TXkcNgDjy4Epg== From: Jiaxun Yang To: linux-pci@vger.kernel.org Cc: Jiaxun Yang , Rob Herring , Bjorn Helgaas , Rob Herring , Thomas Bogendoerfer , Huacai Chen , Lorenzo Pieralisi , Paul Burton , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org Subject: [PATCH v10 2/5] PCI: Add Loongson PCI Controller support Date: Thu, 14 May 2020 21:16:38 +0800 Message-Id: <20200514131650.3587281-2-jiaxun.yang@flygoat.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200514131650.3587281-1-jiaxun.yang@flygoat.com> References: <20200427060551.1372591-1-jiaxun.yang@flygoat.com> <20200514131650.3587281-1-jiaxun.yang@flygoat.com> MIME-Version: 1.0 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org This controller can be found on Loongson-2K SoC, Loongson-3 systems with RS780E/LS7A PCH. The RS780E part of code was previously located at arch/mips/pci/ops-loongson3.c and now it can use generic PCI driver implementation. Signed-off-by: Jiaxun Yang Reviewed-by: Rob Herring Acked-by: Lorenzo Pieralisi --- v2: - Clean up according to rob's suggestions - Claim that it can't work as a module v3: - Fix a typo v4: - More clean-ups: Drop flag check, use devfn v7: - Fix ordering according to huacai's suggestion v8: - Style clean and bugfix according to Bjorn's review v9: - Confirm with vendor about the details on system_bus BARs - Further cleanups - I think assume root_bus as 0 simplify our code a lot, as that's always valid to the hardware, as we're not ecam or dwc, we can't easily get host bus_nr via cfg, adding that will cause unnecessary overhead. v10: - Enhance comments about system_bus quirk and host bus quirk. --- drivers/pci/controller/Kconfig | 10 ++ drivers/pci/controller/Makefile | 1 + drivers/pci/controller/pci-loongson.c | 249 ++++++++++++++++++++++++++ 3 files changed, 260 insertions(+) create mode 100644 drivers/pci/controller/pci-loongson.c diff --git a/drivers/pci/controller/Kconfig b/drivers/pci/controller/Kconfig index 91bfdb784829..ae36edb1d7db 100644 --- a/drivers/pci/controller/Kconfig +++ b/drivers/pci/controller/Kconfig @@ -258,6 +258,16 @@ config PCI_HYPERV_INTERFACE The Hyper-V PCI Interface is a helper driver allows other drivers to have a common interface with the Hyper-V PCI frontend driver. +config PCI_LOONGSON + bool "LOONGSON PCI Controller" + depends on MACH_LOONGSON64 || COMPILE_TEST + depends on OF + depends on PCI_QUIRKS + default MACH_LOONGSON64 + help + Say Y here if you want to enable PCI controller support on + Loongson systems. + source "drivers/pci/controller/dwc/Kconfig" source "drivers/pci/controller/mobiveil/Kconfig" source "drivers/pci/controller/cadence/Kconfig" diff --git a/drivers/pci/controller/Makefile b/drivers/pci/controller/Makefile index 158c59771824..fbac4b0190a0 100644 --- a/drivers/pci/controller/Makefile +++ b/drivers/pci/controller/Makefile @@ -28,6 +28,7 @@ obj-$(CONFIG_PCIE_MEDIATEK) += pcie-mediatek.o obj-$(CONFIG_PCIE_TANGO_SMP8759) += pcie-tango.o obj-$(CONFIG_VMD) += vmd.o obj-$(CONFIG_PCIE_BRCMSTB) += pcie-brcmstb.o +obj-$(CONFIG_PCI_LOONGSON) += pci-loongson.o # pcie-hisi.o quirks are needed even without CONFIG_PCIE_DW obj-y += dwc/ obj-y += mobiveil/ diff --git a/drivers/pci/controller/pci-loongson.c b/drivers/pci/controller/pci-loongson.c new file mode 100644 index 000000000000..4879377b86f3 --- /dev/null +++ b/drivers/pci/controller/pci-loongson.c @@ -0,0 +1,249 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Loongson PCI Host Controller Driver + * + * Copyright (C) 2020 Jiaxun Yang + */ + +#include +#include +#include +#include + +#include "../pci.h" + +/* Device IDs */ +#define DEV_PCIE_PORT_0 0x7a09 +#define DEV_PCIE_PORT_1 0x7a19 +#define DEV_PCIE_PORT_2 0x7a29 + +#define DEV_LS2K_APB 0x7a02 +#define DEV_LS7A_CONF 0x7a10 +#define DEV_LS7A_LPC 0x7a0c + +#define FLAG_CFG0 BIT(0) +#define FLAG_CFG1 BIT(1) +#define FLAG_DEV_FIX BIT(2) + +struct loongson_pci { + void __iomem *cfg0_base; + void __iomem *cfg1_base; + struct platform_device *pdev; + u32 flags; +}; + +/* Fixup wrong class code in PCIe bridges */ +static void bridge_class_quirk(struct pci_dev *dev) +{ + dev->class = PCI_CLASS_BRIDGE_PCI << 8; +} +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_LOONGSON, + DEV_PCIE_PORT_0, bridge_class_quirk); +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_LOONGSON, + DEV_PCIE_PORT_1, bridge_class_quirk); +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_LOONGSON, + DEV_PCIE_PORT_2, bridge_class_quirk); + +static void system_bus_quirk(struct pci_dev *pdev) +{ + u16 tmp; + + /* + * The address space consumed by these devices is outside the + * resources of the host bridge. + */ + pdev->mmio_always_on = 1; + pdev->non_compliant_bars = 1; +} +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_LOONGSON, + DEV_LS2K_APB, system_bus_quirk); +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_LOONGSON, + DEV_LS7A_CONF, system_bus_quirk); +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_LOONGSON, + DEV_LS7A_LPC, system_bus_quirk); + +static void loongson_mrrs_quirk(struct pci_dev *dev) +{ + struct pci_bus *bus = dev->bus; + struct pci_dev *bridge; + static const struct pci_device_id bridge_devids[] = { + { PCI_VDEVICE(LOONGSON, DEV_PCIE_PORT_0) }, + { PCI_VDEVICE(LOONGSON, DEV_PCIE_PORT_1) }, + { PCI_VDEVICE(LOONGSON, DEV_PCIE_PORT_2) }, + { 0, }, + }; + + /* look for the matching bridge */ + while (!pci_is_root_bus(bus)) { + bridge = bus->self; + bus = bus->parent; + /* + * Some Loongson PCIe ports have a h/w limitation of + * 256 bytes maximum read request size. They can't handle + * anything larger than this. So force this limit on + * any devices attached under these ports. + */ + if (pci_match_id(bridge_devids, bridge)) { + if (pcie_get_readrq(dev) > 256) { + pci_info(dev, "limiting MRRS to 256\n"); + pcie_set_readrq(dev, 256); + } + break; + } + } +} +DECLARE_PCI_FIXUP_ENABLE(PCI_ANY_ID, PCI_ANY_ID, loongson_mrrs_quirk); + +static void __iomem *cfg1_map(struct loongson_pci *priv, int bus, + unsigned int devfn, int where) +{ + unsigned long addroff = 0x0; + + if (bus != 0) + addroff |= BIT(28); /* Type 1 Access */ + addroff |= (where & 0xff) | ((where & 0xf00) << 16); + addroff |= (bus << 16) | (devfn << 8); + return priv->cfg1_base + addroff; +} + +static void __iomem *cfg0_map(struct loongson_pci *priv, int bus, + unsigned int devfn, int where) +{ + unsigned long addroff = 0x0; + + if (bus != 0) + addroff |= BIT(24); /* Type 1 Access */ + addroff |= (bus << 16) | (devfn << 8) | where; + return priv->cfg0_base + addroff; +} + +void __iomem *pci_loongson_map_bus(struct pci_bus *bus, unsigned int devfn, + int where) +{ + unsigned char busnum = bus->number; + struct pci_host_bridge *bridge = pci_find_host_bridge(bus); + struct loongson_pci *priv = pci_host_bridge_priv(bridge); + + /* + * Do not read more than one device on the bus other than + * the host bus. For our hardware the root bus is always bus 0. + */ + if (priv->flags & FLAG_DEV_FIX && busnum != 0 && + PCI_SLOT(devfn) > 0) + return NULL; + + /* CFG0 can only access standard space */ + if (where < PCI_CFG_SPACE_SIZE && priv->cfg0_base) + return cfg0_map(priv, busnum, devfn, where); + + /* CFG1 can access extended space */ + if (where < PCI_CFG_SPACE_EXP_SIZE && priv->cfg1_base) + return cfg1_map(priv, busnum, devfn, where); + + return NULL; +} + +static int loongson_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) +{ + int irq; + u8 val; + + irq = of_irq_parse_and_map_pci(dev, slot, pin); + if (irq > 0) + return irq; + + /* Care i8259 legacy systems */ + pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &val); + /* i8259 only have 15 IRQs */ + if (val > 15) + return 0; + + return val; +} + +/* H/w only accept 32-bit PCI operations */ +static struct pci_ops loongson_pci_ops = { + .map_bus = pci_loongson_map_bus, + .read = pci_generic_config_read32, + .write = pci_generic_config_write32, +}; + +static const struct of_device_id loongson_pci_of_match[] = { + { .compatible = "loongson,ls2k-pci", + .data = (void *)(FLAG_CFG0 | FLAG_CFG1 | FLAG_DEV_FIX), }, + { .compatible = "loongson,ls7a-pci", + .data = (void *)(FLAG_CFG0 | FLAG_CFG1 | FLAG_DEV_FIX), }, + { .compatible = "loongson,rs780e-pci", + .data = (void *)(FLAG_CFG0), }, + {} +}; + +static int loongson_pci_probe(struct platform_device *pdev) +{ + struct loongson_pci *priv; + struct device *dev = &pdev->dev; + struct device_node *node = dev->of_node; + struct pci_host_bridge *bridge; + struct resource *regs; + int err; + + if (!node) + return -ENODEV; + + bridge = devm_pci_alloc_host_bridge(dev, sizeof(*priv)); + if (!bridge) + return -ENODEV; + + priv = pci_host_bridge_priv(bridge); + priv->pdev = pdev; + priv->flags = (unsigned long)of_device_get_match_data(dev); + + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!regs) { + dev_err(dev, "missing mem resources for cfg0\n"); + return -EINVAL; + } + + priv->cfg0_base = devm_pci_remap_cfg_resource(dev, regs); + if (IS_ERR(priv->cfg0_base)) + return PTR_ERR(priv->cfg0_base); + + /* CFG1 is optional */ + if (priv->flags & FLAG_CFG1) { + regs = platform_get_resource(pdev, IORESOURCE_MEM, 1); + if (!regs) + dev_info(dev, "missing mem resource for cfg1\n"); + else { + priv->cfg1_base = devm_pci_remap_cfg_resource(dev, regs); + if (IS_ERR(priv->cfg1_base)) + priv->cfg1_base = NULL; + } + } + + err = pci_parse_request_of_pci_ranges(dev, &bridge->windows, + &bridge->dma_ranges, NULL); + if (err) { + dev_err(dev, "failed to get bridge resources\n"); + return err; + } + + bridge->dev.parent = dev; + bridge->sysdata = priv; + bridge->ops = &loongson_pci_ops; + bridge->map_irq = loongson_map_irq; + + err = pci_host_probe(bridge); + if (err) + return err; + + return 0; +} + +static struct platform_driver loongson_pci_driver = { + .driver = { + .name = "loongson-pci", + .of_match_table = loongson_pci_of_match, + }, + .probe = loongson_pci_probe, +}; +builtin_platform_driver(loongson_pci_driver); From patchwork Thu May 14 13:16:39 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiaxun Yang X-Patchwork-Id: 11548689 X-Patchwork-Delegate: lorenzo.pieralisi@arm.com Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 3A3D8138A for ; Thu, 14 May 2020 13:17:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 209A02073E for ; Thu, 14 May 2020 13:17:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=flygoat.com header.i=@flygoat.com header.b="kBohED52" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726073AbgENNR3 (ORCPT ); Thu, 14 May 2020 09:17:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52348 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1726037AbgENNR3 (ORCPT ); Thu, 14 May 2020 09:17:29 -0400 Received: from vultr.net.flygoat.com (vultr.net.flygoat.com [IPv6:2001:19f0:6001:3633:5400:2ff:fe8c:553]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 397D6C061A0C; Thu, 14 May 2020 06:17:29 -0700 (PDT) Received: from localhost.localdomain (unknown [142.147.94.151]) by vultr.net.flygoat.com (Postfix) with ESMTPSA id 9AA9C204A8; Thu, 14 May 2020 13:17:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=flygoat.com; s=vultr; t=1589462249; bh=Mn6Bj99R7IROKyQOr3uNUsAxTtMjRS62SMsOKFT4n9Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kBohED52D44WfEN/EokUpmszPVWqHUnaMB5UDbeYXwDgLPLmp38nRI1GqJ29CIFPz y90VSY9x5OvsCztn/QHKVUawmgtAXIksF5NgwKW4Ybfd1Sgq9Gmik1VyHfkYzAMixf k+OyluF2Bxj1sQUih5+PhA+VbqkuvYu7EO7foAmxxCQ+IId67RYd4dJz1HutS+K3y3 49mbE7EsjDGKSdAlupOfwsD5GSgp48BGsQwlA1W8nAosmJ4oESUAiD8J3CVNZ/9ElI QGmstKraNx3iH4BqMLagBLwM/d6iiqmvSLHMWk9F64u3qrQWjDHPpmcpI3jgdhylxM 6PRes0zwaDq0g== From: Jiaxun Yang To: linux-pci@vger.kernel.org Cc: Jiaxun Yang , Rob Herring , Bjorn Helgaas , Rob Herring , Thomas Bogendoerfer , Huacai Chen , Lorenzo Pieralisi , Paul Burton , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org Subject: [PATCH v10 3/5] dt-bindings: Document Loongson PCI Host Controller Date: Thu, 14 May 2020 21:16:39 +0800 Message-Id: <20200514131650.3587281-3-jiaxun.yang@flygoat.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200514131650.3587281-1-jiaxun.yang@flygoat.com> References: <20200427060551.1372591-1-jiaxun.yang@flygoat.com> <20200514131650.3587281-1-jiaxun.yang@flygoat.com> MIME-Version: 1.0 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org PCI host controller found on Loongson PCHs and SoCs. Signed-off-by: Jiaxun Yang Reviewed-by: Rob Herring --- .../devicetree/bindings/pci/loongson.yaml | 62 +++++++++++++++++++ 1 file changed, 62 insertions(+) create mode 100644 Documentation/devicetree/bindings/pci/loongson.yaml diff --git a/Documentation/devicetree/bindings/pci/loongson.yaml b/Documentation/devicetree/bindings/pci/loongson.yaml new file mode 100644 index 000000000000..30e7cf1aeb87 --- /dev/null +++ b/Documentation/devicetree/bindings/pci/loongson.yaml @@ -0,0 +1,62 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/pci/loongson.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Loongson PCI Host Controller + +maintainers: + - Jiaxun Yang + +description: |+ + PCI host controller found on Loongson PCHs and SoCs. + +allOf: + - $ref: /schemas/pci/pci-bus.yaml# + +properties: + compatible: + oneOf: + - const: loongson,ls2k-pci + - const: loongson,ls7a-pci + - const: loongson,rs780e-pci + + reg: + minItems: 1 + maxItems: 2 + items: + - description: CFG0 standard config space register + - description: CFG1 extended config space register + + ranges: + minItems: 1 + maxItems: 3 + + +required: + - compatible + - reg + - ranges + +examples: + - | + + bus { + #address-cells = <2>; + #size-cells = <2>; + pcie@1a000000 { + compatible = "loongson,rs780e-pci"; + device_type = "pci"; + #address-cells = <3>; + #size-cells = <2>; + + // CPU_PHYSICAL(2) SIZE(2) + reg = <0x0 0x1a000000 0x0 0x2000000>; + + // BUS_ADDRESS(3) CPU_PHYSICAL(2) SIZE(2) + ranges = <0x01000000 0x0 0x00004000 0x0 0x00004000 0x0 0x00004000>, + <0x02000000 0x0 0x40000000 0x0 0x40000000 0x0 0x40000000>; + }; + }; +... From patchwork Thu May 14 13:16:40 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiaxun Yang X-Patchwork-Id: 11548695 X-Patchwork-Delegate: lorenzo.pieralisi@arm.com Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 824F160D for ; Thu, 14 May 2020 13:17:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 68A9920756 for ; Thu, 14 May 2020 13:17:45 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=flygoat.com header.i=@flygoat.com header.b="kxjLBnzS" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726087AbgENNRl (ORCPT ); Thu, 14 May 2020 09:17:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52384 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1726037AbgENNRl (ORCPT ); Thu, 14 May 2020 09:17:41 -0400 Received: from vultr.net.flygoat.com (vultr.net.flygoat.com [IPv6:2001:19f0:6001:3633:5400:2ff:fe8c:553]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7D56FC061A0C; Thu, 14 May 2020 06:17:41 -0700 (PDT) Received: from localhost.localdomain (unknown [142.147.94.151]) by vultr.net.flygoat.com (Postfix) with ESMTPSA id 12843204CB; Thu, 14 May 2020 13:17:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=flygoat.com; s=vultr; t=1589462261; bh=2II2DHV4+Iks6xy2EWtnJbO+xA3KlRUpJ+Ydv9JIdBs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kxjLBnzSnCKPKzk3QO7XoEx1iBeA5qZtU1+cumcmELrDgLUQhlhnW+JvHfaRWbGRS txPaC3dFUldnFN4oZmPF8aiQjj1pLv2PoQumDjB0PADTNso7pwDU1sZMRSPFyzJtvl ipO/FiOLUN50R843o0ZAWN5tqMnwcElRXtx7pJAgWddIKK2i/SWj2UDvDqeKUnn+sk drHHLZ+qAZOq3c7F9iMh96moNZ9i4ZJWTziI7ch4ugfmt6c/Oj4nddRZz1fIsUCaRC PyJO3w08/+yADnJlm6IiCE9wCHXxJoanog7xUbO+htcD38oA4wVQzC/BIcE0QzW5dA rAt+01Cj7mh+w== From: Jiaxun Yang To: linux-pci@vger.kernel.org Cc: Jiaxun Yang , Bjorn Helgaas , Rob Herring , Thomas Bogendoerfer , Huacai Chen , Lorenzo Pieralisi , Paul Burton , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org Subject: [PATCH v10 4/5] MIPS: DTS: Loongson64: Add PCI Controller Node Date: Thu, 14 May 2020 21:16:40 +0800 Message-Id: <20200514131650.3587281-4-jiaxun.yang@flygoat.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200514131650.3587281-1-jiaxun.yang@flygoat.com> References: <20200427060551.1372591-1-jiaxun.yang@flygoat.com> <20200514131650.3587281-1-jiaxun.yang@flygoat.com> MIME-Version: 1.0 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Add PCI Host controller node for Loongson64 with RS780E PCH dts. Note that PCI interrupts are probed via legacy way, as different machine have different interrupt arrangement, we can't cover all of them in dt. Signed-off-by: Jiaxun Yang Acked-by: Thomas Bogendoerfer --- arch/mips/boot/dts/loongson/rs780e-pch.dtsi | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/arch/mips/boot/dts/loongson/rs780e-pch.dtsi b/arch/mips/boot/dts/loongson/rs780e-pch.dtsi index 8687c4f7370a..d0d5d60a8697 100644 --- a/arch/mips/boot/dts/loongson/rs780e-pch.dtsi +++ b/arch/mips/boot/dts/loongson/rs780e-pch.dtsi @@ -9,6 +9,18 @@ bus@10000000 { 0 0x40000000 0 0x40000000 0 0x40000000 0xfd 0xfe000000 0xfd 0xfe000000 0 0x2000000 /* PCI Config Space */>; + pci@1a000000 { + compatible = "loongson,rs780e-pci"; + device_type = "pci"; + #address-cells = <3>; + #size-cells = <2>; + + reg = <0 0x1a000000 0 0x02000000>; + + ranges = <0x01000000 0 0x00004000 0 0x18004000 0 0x00004000>, + <0x02000000 0 0x40000000 0 0x40000000 0 0x40000000>; + }; + isa { compatible = "isa"; #address-cells = <2>; From patchwork Thu May 14 13:16:41 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiaxun Yang X-Patchwork-Id: 11548699 X-Patchwork-Delegate: lorenzo.pieralisi@arm.com Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8E53960D for ; Thu, 14 May 2020 13:17:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 649772074A for ; Thu, 14 May 2020 13:17:55 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=flygoat.com header.i=@flygoat.com header.b="LOsjAs/j" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727898AbgENNRy (ORCPT ); Thu, 14 May 2020 09:17:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52416 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1727891AbgENNRx (ORCPT ); Thu, 14 May 2020 09:17:53 -0400 Received: from vultr.net.flygoat.com (vultr.net.flygoat.com [IPv6:2001:19f0:6001:3633:5400:2ff:fe8c:553]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EF298C061A0C; Thu, 14 May 2020 06:17:53 -0700 (PDT) Received: from localhost.localdomain (unknown [142.147.94.151]) by vultr.net.flygoat.com (Postfix) with ESMTPSA id 84EB620820; Thu, 14 May 2020 13:17:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=flygoat.com; s=vultr; t=1589462273; bh=uqS/qkV/cOZlWr119FMfbm4Ch6cVX5nOp6L8u7qoUlg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LOsjAs/jrtrVcBRpPYTQs+4CvCpJ+gDxkA6T7ME0uSlnJzX6IZed5UVY9zKUTSrs0 yWZH2TsWoAYbVMFJlch/jnOnCoP48BgASSRA3/SeBtmyQ55k2v0jXCW+CtS5ud3u6f zT2yPNrMt4mEq62O2xSYndSY+P8GvAqZrZ8RbI2IbZX3QZj0cAXrrdLJ8gzJ4HluJp bFp53F7z9g026wk4k77zhLbC1lEqKjgu8uCvS5rLtb7mrD9l89aI1mF+AOkxRmEehE IYF18JhWv6EBLVoDUqDloGUw+NiG+MHjJ+gZxIFIQjqOK1oAISVl/Sa4JVPvXcvA3U hQDR/RHbBBxsQ== From: Jiaxun Yang To: linux-pci@vger.kernel.org Cc: Jiaxun Yang , Bjorn Helgaas , Rob Herring , Thomas Bogendoerfer , Huacai Chen , Lorenzo Pieralisi , Paul Burton , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org Subject: [PATCH v10 5/5] MIPS: Loongson64: Switch to generic PCI driver Date: Thu, 14 May 2020 21:16:41 +0800 Message-Id: <20200514131650.3587281-5-jiaxun.yang@flygoat.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200514131650.3587281-1-jiaxun.yang@flygoat.com> References: <20200427060551.1372591-1-jiaxun.yang@flygoat.com> <20200514131650.3587281-1-jiaxun.yang@flygoat.com> MIME-Version: 1.0 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org We can now enable generic PCI driver in Kconfig, and remove legacy PCI driver code. Radeon vbios quirk is moved to the platform folder to fit the new structure. Signed-off-by: Jiaxun Yang Acked-by: Thomas Bogendoerfer --- v9: Fix licenses tag --- arch/mips/Kconfig | 1 + arch/mips/loongson64/Makefile | 2 +- arch/mips/loongson64/vbios_quirk.c | 29 ++++++++ arch/mips/pci/Makefile | 1 - arch/mips/pci/fixup-loongson3.c | 71 ------------------ arch/mips/pci/ops-loongson3.c | 116 ----------------------------- 6 files changed, 31 insertions(+), 189 deletions(-) create mode 100644 arch/mips/loongson64/vbios_quirk.c delete mode 100644 arch/mips/pci/fixup-loongson3.c delete mode 100644 arch/mips/pci/ops-loongson3.c diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 0519ca9f00f9..7a4fcc4ade1f 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -480,6 +480,7 @@ config MACH_LOONGSON64 select IRQ_MIPS_CPU select NR_CPUS_DEFAULT_64 select USE_GENERIC_EARLY_PRINTK_8250 + select PCI_DRIVERS_GENERIC select SYS_HAS_CPU_LOONGSON64 select SYS_HAS_EARLY_PRINTK select SYS_SUPPORTS_SMP diff --git a/arch/mips/loongson64/Makefile b/arch/mips/loongson64/Makefile index 6f3c2b47f66f..6f81b822aeae 100644 --- a/arch/mips/loongson64/Makefile +++ b/arch/mips/loongson64/Makefile @@ -8,5 +8,5 @@ obj-$(CONFIG_MACH_LOONGSON64) += cop2-ex.o platform.o dma.o \ obj-$(CONFIG_SMP) += smp.o obj-$(CONFIG_NUMA) += numa.o obj-$(CONFIG_RS780_HPET) += hpet.o -obj-$(CONFIG_PCI) += pci.o obj-$(CONFIG_SUSPEND) += pm.o +obj-$(CONFIG_PCI_QUIRKS) += vbios_quirk.o diff --git a/arch/mips/loongson64/vbios_quirk.c b/arch/mips/loongson64/vbios_quirk.c new file mode 100644 index 000000000000..9a29e94d3db1 --- /dev/null +++ b/arch/mips/loongson64/vbios_quirk.c @@ -0,0 +1,29 @@ +// SPDX-License-Identifier: GPL-2.0+ + +#include +#include + +static void pci_fixup_radeon(struct pci_dev *pdev) +{ + struct resource *res = &pdev->resource[PCI_ROM_RESOURCE]; + + if (res->start) + return; + + if (!loongson_sysconf.vgabios_addr) + return; + + pci_disable_rom(pdev); + if (res->parent) + release_resource(res); + + res->start = virt_to_phys((void *) loongson_sysconf.vgabios_addr); + res->end = res->start + 256*1024 - 1; + res->flags = IORESOURCE_MEM | IORESOURCE_ROM_SHADOW | + IORESOURCE_PCI_FIXED; + + dev_info(&pdev->dev, "BAR %d: assigned %pR for Radeon ROM\n", + PCI_ROM_RESOURCE, res); +} +DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_ATI, 0x9615, + PCI_CLASS_DISPLAY_VGA, 8, pci_fixup_radeon); diff --git a/arch/mips/pci/Makefile b/arch/mips/pci/Makefile index 342ce10ef593..438f10955d89 100644 --- a/arch/mips/pci/Makefile +++ b/arch/mips/pci/Makefile @@ -35,7 +35,6 @@ obj-$(CONFIG_LASAT) += pci-lasat.o obj-$(CONFIG_MIPS_COBALT) += fixup-cobalt.o obj-$(CONFIG_LEMOTE_FULOONG2E) += fixup-fuloong2e.o ops-loongson2.o obj-$(CONFIG_LEMOTE_MACH2F) += fixup-lemote2f.o ops-loongson2.o -obj-$(CONFIG_MACH_LOONGSON64) += fixup-loongson3.o ops-loongson3.o obj-$(CONFIG_MIPS_MALTA) += fixup-malta.o pci-malta.o obj-$(CONFIG_PMC_MSP7120_GW) += fixup-pmcmsp.o ops-pmcmsp.o obj-$(CONFIG_PMC_MSP7120_EVAL) += fixup-pmcmsp.o ops-pmcmsp.o diff --git a/arch/mips/pci/fixup-loongson3.c b/arch/mips/pci/fixup-loongson3.c deleted file mode 100644 index 8a741c2c6685..000000000000 --- a/arch/mips/pci/fixup-loongson3.c +++ /dev/null @@ -1,71 +0,0 @@ -/* - * fixup-loongson3.c - * - * Copyright (C) 2012 Lemote, Inc. - * Author: Xiang Yu, xiangy@lemote.com - * Chen Huacai, chenhc@lemote.com - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. - * - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED - * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN - * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF - * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON - * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF - * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - */ - -#include -#include - -static void print_fixup_info(const struct pci_dev *pdev) -{ - dev_info(&pdev->dev, "Device %x:%x, irq %d\n", - pdev->vendor, pdev->device, pdev->irq); -} - -int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) -{ - print_fixup_info(dev); - return dev->irq; -} - -static void pci_fixup_radeon(struct pci_dev *pdev) -{ - struct resource *res = &pdev->resource[PCI_ROM_RESOURCE]; - - if (res->start) - return; - - if (!loongson_sysconf.vgabios_addr) - return; - - pci_disable_rom(pdev); - if (res->parent) - release_resource(res); - - res->start = virt_to_phys((void *) loongson_sysconf.vgabios_addr); - res->end = res->start + 256*1024 - 1; - res->flags = IORESOURCE_MEM | IORESOURCE_ROM_SHADOW | - IORESOURCE_PCI_FIXED; - - dev_info(&pdev->dev, "BAR %d: assigned %pR for Radeon ROM\n", - PCI_ROM_RESOURCE, res); -} - -DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_ATI, PCI_ANY_ID, - PCI_CLASS_DISPLAY_VGA, 8, pci_fixup_radeon); - -/* Do platform specific device initialization at pci_enable_device() time */ -int pcibios_plat_dev_init(struct pci_dev *dev) -{ - return 0; -} diff --git a/arch/mips/pci/ops-loongson3.c b/arch/mips/pci/ops-loongson3.c deleted file mode 100644 index 2f6ad36bdea6..000000000000 --- a/arch/mips/pci/ops-loongson3.c +++ /dev/null @@ -1,116 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -#include -#include -#include - -#include - -#include - -#define PCI_ACCESS_READ 0 -#define PCI_ACCESS_WRITE 1 - -#define HT1LO_PCICFG_BASE 0x1a000000 -#define HT1LO_PCICFG_BASE_TP1 0x1b000000 - -static int loongson3_pci_config_access(unsigned char access_type, - struct pci_bus *bus, unsigned int devfn, - int where, u32 *data) -{ - unsigned char busnum = bus->number; - int function = PCI_FUNC(devfn); - int device = PCI_SLOT(devfn); - int reg = where & ~3; - void *addrp; - u64 addr; - - if (where < PCI_CFG_SPACE_SIZE) { /* standard config */ - addr = (busnum << 16) | (device << 11) | (function << 8) | reg; - if (busnum == 0) { - if (device > 31) - return PCIBIOS_DEVICE_NOT_FOUND; - addrp = (void *)TO_UNCAC(HT1LO_PCICFG_BASE | addr); - } else { - addrp = (void *)TO_UNCAC(HT1LO_PCICFG_BASE_TP1 | addr); - } - } else if (where < PCI_CFG_SPACE_EXP_SIZE) { /* extended config */ - struct pci_dev *rootdev; - - rootdev = pci_get_domain_bus_and_slot(0, 0, 0); - if (!rootdev) - return PCIBIOS_DEVICE_NOT_FOUND; - - addr = pci_resource_start(rootdev, 3); - if (!addr) - return PCIBIOS_DEVICE_NOT_FOUND; - - addr |= busnum << 20 | device << 15 | function << 12 | reg; - addrp = (void *)TO_UNCAC(addr); - } else { - return PCIBIOS_DEVICE_NOT_FOUND; - } - - if (access_type == PCI_ACCESS_WRITE) - writel(*data, addrp); - else { - *data = readl(addrp); - if (*data == 0xffffffff) { - *data = -1; - return PCIBIOS_DEVICE_NOT_FOUND; - } - } - return PCIBIOS_SUCCESSFUL; -} - -static int loongson3_pci_pcibios_read(struct pci_bus *bus, unsigned int devfn, - int where, int size, u32 *val) -{ - u32 data = 0; - int ret = loongson3_pci_config_access(PCI_ACCESS_READ, - bus, devfn, where, &data); - - if (ret != PCIBIOS_SUCCESSFUL) - return ret; - - if (size == 1) - *val = (data >> ((where & 3) << 3)) & 0xff; - else if (size == 2) - *val = (data >> ((where & 3) << 3)) & 0xffff; - else - *val = data; - - return PCIBIOS_SUCCESSFUL; -} - -static int loongson3_pci_pcibios_write(struct pci_bus *bus, unsigned int devfn, - int where, int size, u32 val) -{ - u32 data = 0; - int ret; - - if (size == 4) - data = val; - else { - ret = loongson3_pci_config_access(PCI_ACCESS_READ, - bus, devfn, where, &data); - if (ret != PCIBIOS_SUCCESSFUL) - return ret; - - if (size == 1) - data = (data & ~(0xff << ((where & 3) << 3))) | - (val << ((where & 3) << 3)); - else if (size == 2) - data = (data & ~(0xffff << ((where & 3) << 3))) | - (val << ((where & 3) << 3)); - } - - ret = loongson3_pci_config_access(PCI_ACCESS_WRITE, - bus, devfn, where, &data); - - return ret; -} - -struct pci_ops loongson_pci_ops = { - .read = loongson3_pci_pcibios_read, - .write = loongson3_pci_pcibios_write -};