From patchwork Thu Sep 18 02:08:26 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Suravee Suthikulpanit X-Patchwork-Id: 4928471 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Original-To: patchwork-linux-pci@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 5F9E2BEEA5 for ; Thu, 18 Sep 2014 02:09:44 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id A4F6E201B4 for ; Thu, 18 Sep 2014 02:09:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CCD402015D for ; Thu, 18 Sep 2014 02:09:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757425AbaIRCJU (ORCPT ); Wed, 17 Sep 2014 22:09:20 -0400 Received: from mail-by2on0116.outbound.protection.outlook.com ([207.46.100.116]:40777 "EHLO na01-by2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1755836AbaIRCJS (ORCPT ); Wed, 17 Sep 2014 22:09:18 -0400 Received: from BY2PR02CA0052.namprd02.prod.outlook.com (10.141.216.42) by BLUPR02MB194.namprd02.prod.outlook.com (10.242.189.152) with Microsoft SMTP Server (TLS) id 15.0.1029.13; Thu, 18 Sep 2014 02:09:14 +0000 Received: from BY2FFO11FD010.protection.gbl (2a01:111:f400:7c0c::143) by BY2PR02CA0052.outlook.office365.com (2a01:111:e400:2c40::42) with Microsoft SMTP Server (TLS) id 15.0.1034.13 via Frontend Transport; Thu, 18 Sep 2014 02:09:13 +0000 Received: from atltwp02.amd.com (165.204.84.222) by BY2FFO11FD010.mail.protection.outlook.com (10.1.14.74) with Microsoft SMTP Server id 15.0.1029.15 via Frontend Transport; Thu, 18 Sep 2014 02:09:11 +0000 X-WSS-ID: 0NC2RB7-08-FRE-02 X-M-MSG: Received: from satlvexedge02.amd.com (satlvexedge02.amd.com [10.177.96.29]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) by atltwp02.amd.com (Axway MailGate 5.3.1) with ESMTPS id 20965D16007; Wed, 17 Sep 2014 21:09:07 -0500 (CDT) Received: from SATLEXDAG02.amd.com (10.181.40.5) by SATLVEXEDGE02.amd.com (10.177.96.29) with Microsoft SMTP Server (TLS) id 14.3.195.1; Wed, 17 Sep 2014 21:09:18 -0500 Received: from ssuthiku-fedora-lt.amd.com (10.180.168.240) by SATLEXDAG02.amd.com (10.181.40.5) with Microsoft SMTP Server id 14.3.195.1; Wed, 17 Sep 2014 22:09:06 -0400 From: To: , , CC: , , , , , , , , , , , "Suravee Suthikulpanit" , Mark Rutland , Marc Zyngier Subject: [PATCH 2/2] irqchip: gicv2m: Add supports for ARM GICv2m MSI(-X) Date: Wed, 17 Sep 2014 19:08:26 -0700 Message-ID: <1411006106-17339-3-git-send-email-suravee.suthikulpanit@amd.com> X-Mailer: git-send-email 1.9.3 In-Reply-To: <1411006106-17339-1-git-send-email-suravee.suthikulpanit@amd.com> References: <1411006106-17339-1-git-send-email-suravee.suthikulpanit@amd.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-Forefront-Antispam-Report: CIP:165.204.84.222; CTRY:US; IPV:NLI; EFV:NLI; SFV:NSPM; SFS:(10019020)(6009001)(428002)(189002)(199003)(89996001)(36756003)(50986999)(106466001)(88136002)(2201001)(21056001)(92726001)(85306004)(80022003)(79102003)(81542003)(74502003)(64706001)(93916002)(101416001)(77982003)(74662003)(31966008)(77156001)(33646002)(19580395003)(85852003)(92566001)(81342003)(87286001)(86362001)(20776003)(68736004)(4396001)(87936001)(105586002)(50466002)(47776003)(77096002)(50226001)(44976005)(90102001)(62966002)(53416004)(19580405001)(107046002)(104166001)(76176999)(46102003)(86152002)(97736003)(48376002)(83072002)(229853001)(95666004)(84676001)(83322001)(99396002)(2004002); DIR:OUT; SFP:1102; SCL:1; SRVR:BLUPR02MB194; H:atltwp02.amd.com; FPR:; MLV:sfv; PTR:InfoDomainNonexistent; MX:1; A:1; LANG:en; X-Microsoft-Antispam: BCL:0;PCL:0;RULEID:;UriScan:; X-Forefront-PRVS: 033857D0BD Received-SPF: None (protection.outlook.com: amd.com does not designate permitted sender hosts) Authentication-Results: spf=none (sender IP is 165.204.84.222) smtp.mailfrom=Suravee.Suthikulpanit@amd.com; X-OriginatorOrg: amd4.onmicrosoft.com Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Spam-Status: No, score=-7.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Suravee Suthikulpanit ARM GICv2m specification extends GICv2 to support MSI(-X) with a new set of register frame. This patch introduces support for the non-secure GICv2m register frame. Currently, GICV2m is available in certain version of GIC-400. The patch introduces a new property in ARM gic binding, the v2m subnode. It is optional. Signed-off-by: Suravee Suthikulpanit Cc: Mark Rutland Cc: Marc Zyngier Cc: Jason Cooper Cc: Catalin Marinas Cc: Will Deacon --- Documentation/devicetree/bindings/arm/gic.txt | 55 ++++ arch/arm64/Kconfig | 1 + drivers/irqchip/Kconfig | 7 + drivers/irqchip/Makefile | 1 + drivers/irqchip/irq-gic-common.c | 12 + drivers/irqchip/irq-gic-common.h | 4 + drivers/irqchip/irq-gic-v2m.c | 356 ++++++++++++++++++++++++++ drivers/irqchip/irq-gic.c | 82 +++--- drivers/irqchip/irq-gic.h | 54 ++++ 9 files changed, 542 insertions(+), 30 deletions(-) create mode 100644 drivers/irqchip/irq-gic-v2m.c create mode 100644 drivers/irqchip/irq-gic.h diff --git a/Documentation/devicetree/bindings/arm/gic.txt b/Documentation/devicetree/bindings/arm/gic.txt index c7d2fa1..38b2156 100644 --- a/Documentation/devicetree/bindings/arm/gic.txt +++ b/Documentation/devicetree/bindings/arm/gic.txt @@ -96,3 +96,58 @@ Example: <0x2c006000 0x2000>; interrupts = <1 9 0xf04>; }; + + +* GICv2m extension for MSI/MSI-x support (Optional) + +Certain revision of GIC-400 supports MSI/MSI-x via V2M register frame. +This is enabled by specifying v2m sub-node. + +Required properties: + +- compatible : The value here should be "arm,gic-v2m-frame". + +- msi-controller : Identifies the node as an MSI controller. + +- reg : GICv2m MSI interface register base and size + +Optional properties: + +- arm,msi-base-spi : Specify base SPI the MSI frame. + The SPI base value can be from 32 to 1019. + +- arm,msi-num-spi : Returns the number of contiguous SPIs assigned + to the frame. + +Note: "arm,msi-base-spi" and "arm,msi-num-spi" are used mainly for + providing HW workaround in the case where the MSI_TYPER register + is corrupted. + +Example: + + interrupt-controller@e1101000 { + compatible = "arm,gic-400"; + #interrupt-cells = <3>; + #address-cells = <2>; + #size-cells = <2>; + interrupt-controller; + interrupts = <1 8 0xf04>; + ranges = <0 0 0 0xe1100000 0 0x100000>; + reg = <0x0 0xe1110000 0 0x01000>, + <0x0 0xe112f000 0 0x02000>, + <0x0 0xe1140000 0 0x10000>, + <0x0 0xe1160000 0 0x10000>; + v2m0: v2m@0x8000 { + compatible = "arm,gic-v2m-frame"; + msi-controller; + reg = <0x0 0x80000 0 0x1000>; + }; + + .... + + v2mN: v2m@0x9000 { + compatible = "arm,gic-v2m-frame"; + msi-controller; + reg = <0x0 0x90000 0 0x1000>; + }; + }; diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index fd4e81a..83d5556 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -12,6 +12,7 @@ config ARM64 select ARM_ARCH_TIMER select ARM_GIC select AUDIT_ARCH_COMPAT_GENERIC + select ARM_GIC_V2M select ARM_GIC_V3 select BUILDTIME_EXTABLE_SORT select CLONE_BACKWARDS diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig index b8632bf..ddb31ee 100644 --- a/drivers/irqchip/Kconfig +++ b/drivers/irqchip/Kconfig @@ -7,6 +7,13 @@ config ARM_GIC select IRQ_DOMAIN select MULTI_IRQ_HANDLER +config ARM_GIC_V2M + bool + select IRQ_DOMAIN + select MULTI_IRQ_HANDLER + depends on ARM_GIC + depends on PCI && PCI_MSI + config GIC_NON_BANKED bool diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile index 73052ba..3bda951 100644 --- a/drivers/irqchip/Makefile +++ b/drivers/irqchip/Makefile @@ -17,6 +17,7 @@ obj-$(CONFIG_ARCH_SUNXI) += irq-sun4i.o obj-$(CONFIG_ARCH_SUNXI) += irq-sunxi-nmi.o obj-$(CONFIG_ARCH_SPEAR3XX) += spear-shirq.o obj-$(CONFIG_ARM_GIC) += irq-gic.o irq-gic-common.o +obj-$(CONFIG_ARM_GIC_V2M) += irq-gic-v2m.o obj-$(CONFIG_ARM_GIC_V3) += irq-gic-v3.o irq-gic-common.o obj-$(CONFIG_ARM_NVIC) += irq-nvic.o obj-$(CONFIG_ARM_VIC) += irq-vic.o diff --git a/drivers/irqchip/irq-gic-common.c b/drivers/irqchip/irq-gic-common.c index 60ac704..4b8cff2 100644 --- a/drivers/irqchip/irq-gic-common.c +++ b/drivers/irqchip/irq-gic-common.c @@ -113,3 +113,15 @@ void gic_cpu_config(void __iomem *base, void (*sync_access)(void)) if (sync_access) sync_access(); } + +int gic_msi_get_vec_count(struct pci_dev *pdev, struct msi_desc *desc) +{ + int ret = -EINVAL; +#ifdef CONFIG_PCI_MSI + if (desc->msi_attrib.is_msix) + ret = pci_msix_vec_count(pdev); + else + ret = pci_msi_vec_count(pdev); +#endif + return ret; +} diff --git a/drivers/irqchip/irq-gic-common.h b/drivers/irqchip/irq-gic-common.h index b41f024..95049e5 100644 --- a/drivers/irqchip/irq-gic-common.h +++ b/drivers/irqchip/irq-gic-common.h @@ -19,6 +19,8 @@ #include #include +#include +#include void gic_configure_irq(unsigned int irq, unsigned int type, void __iomem *base, void (*sync_access)(void)); @@ -26,4 +28,6 @@ void gic_dist_config(void __iomem *base, int gic_irqs, void (*sync_access)(void)); void gic_cpu_config(void __iomem *base, void (*sync_access)(void)); +int gic_msi_get_vec_count(struct pci_dev *pdev, struct msi_desc *desc); + #endif /* _IRQ_GIC_COMMON_H */ diff --git a/drivers/irqchip/irq-gic-v2m.c b/drivers/irqchip/irq-gic-v2m.c new file mode 100644 index 0000000..1df5b37 --- /dev/null +++ b/drivers/irqchip/irq-gic-v2m.c @@ -0,0 +1,356 @@ +/* + * ARM GIC v2m MSI(-X) support + * Support for Message Signaled Interrupts for systems that + * implement ARM Generic Interrupt Controller: GICv2m. + * + * Copyright (C) 2014 Advanced Micro Devices, Inc. + * Authors: Suravee Suthikulpanit + * Harish Kasiviswanathan + * Brandon Anderson + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + */ + +#define pr_fmt(fmt) "GICv2m: " fmt + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "irqchip.h" +#include "irq-gic.h" +#include "irq-gic-common.h" + +/* +* MSI_TYPER: +* [31:26] Reserved +* [25:16] lowest SPI assigned to MSI +* [15:10] Reserved +* [9:0] Numer of SPIs assigned to MSI +*/ +#define V2M_MSI_TYPER 0x008 +#define V2M_MSI_TYPER_BASE_SHIFT 16 +#define V2M_MSI_TYPER_BASE_MASK 0x3FF +#define V2M_MSI_TYPER_NUM_MASK 0x3FF +#define V2M_MSI_SETSPI_NS 0x040 +#define V2M_MIN_SPI 32 +#define V2M_MAX_SPI 1019 + +#define V2M_MSI_TYPER_BASE_SPI(x) \ + ((x >> V2M_MSI_TYPER_BASE_SHIFT) & V2M_MSI_TYPER_BASE_MASK) + +#define V2M_MSI_TYPER_NUM_SPI(x) (x & V2M_MSI_TYPER_NUM_MASK) + +/* + * alloc_msi_irq - Allocate MSIs from available MSI bitmap. + * @data: Pointer to v2m_data + * @nvec: Number of interrupts to allocate + * @irq: Pointer to the allocated irq + * + * Allocates interrupts only if the contiguous range of MSIs + * with specified nvec are available. Otherwise return the number + * of available interrupts. If none are available, then returns -ENOENT. + */ +static int alloc_msi_irq(struct v2m_data *data, int nvec, int *irq) +{ + int size = data->nr_spis; + int next = size, i = nvec, ret; + + /* We should never allocate more than available nr_spis */ + if (i >= size) + i = size; + + spin_lock(&data->msi_cnt_lock); + + for (; i > 0; i--) { + next = bitmap_find_next_zero_area(data->bm, + size, 0, i, 0); + if (next < size) + break; + } + + if (i != nvec) { + ret = i ? : -ENOENT; + } else { + bitmap_set(data->bm, next, nvec); + *irq = data->spi_start + next; + ret = 0; + } + + spin_unlock(&data->msi_cnt_lock); + + return ret; +} + +static void gicv2m_teardown_msi_irq(struct msi_chip *chip, unsigned int irq) +{ + int pos; + struct v2m_data *data = container_of(chip, struct v2m_data, msi_chip); + + spin_lock(&data->msi_cnt_lock); + + pos = irq - data->spi_start; + if (pos >= 0 && pos < data->nr_spis) + bitmap_clear(data->bm, pos, 1); + + spin_unlock(&data->msi_cnt_lock); +} + +bool gicv2m_check_msi_range(struct gic_chip_data *gic, irq_hw_number_t hw) +{ + struct v2m_data *v2m = NULL; + + list_for_each_entry(v2m, &gic->v2m_list, list) { + if (hw >= v2m->spi_start && + hw < v2m->spi_start + v2m->nr_spis) + return true; + } + return false; +} + +static int gicv2m_setup_msi_irq(struct msi_chip *chip, + struct pci_dev *pdev, + struct msi_desc *desc) +{ + int i, irq, nvec, avail; + struct msi_msg msg; + phys_addr_t addr; + struct msi_desc *entry; + struct v2m_data *data = container_of(chip, struct v2m_data, msi_chip); + + if (!desc) { + dev_err(&pdev->dev, + "MSI setup failed. Invalid msi descriptor\n"); + return -EINVAL; + } + + if (desc->msi_attrib.is_msix) { + /** + * For MSIx: + * We allocate one irq at a time + */ + avail = alloc_msi_irq(data, 1, &irq); + if (avail != 0) { + dev_err(&pdev->dev, + "MSI setup failed. Cannnot allocate IRQ\n"); + return -ENOSPC; + } + + irq_set_chip_data(irq, chip); + irq_set_msi_desc(irq, desc); + irq_set_irq_type(irq, IRQ_TYPE_EDGE_RISING); + } else { + /** + * For MSI and Multi-MSI: + * All requested irqs are allocated and setup at + * once. Subsequent calls to this function would simply return + * success. This is to avoid having to implement a separate + * function for setting up multiple irqs. + */ + BUG_ON(list_empty(&pdev->msi_list)); + WARN_ON(!list_is_singular(&pdev->msi_list)); + + nvec = gic_msi_get_vec_count(pdev, desc); + if (WARN_ON(nvec <= 0)) + return nvec; + + entry = list_first_entry(&pdev->msi_list, + struct msi_desc, list); + + if ((nvec > 1) && (entry->msi_attrib.multiple)) + return 0; + + avail = alloc_msi_irq(data, nvec, &irq); + if (avail != 0) { + dev_err(&pdev->dev, + "Failed to allocate %d irqs.\n", nvec); + return avail; + } + + if (nvec > 1) { + /* Set lowest of the new interrupts assigned + * to the PCI device + */ + entry->nvec_used = nvec; + entry->msi_attrib.multiple = ilog2( + __roundup_pow_of_two(nvec)); + } + + for (i = 0; i < nvec; i++) { + irq_set_chip_data(irq+i, chip); + if (irq_set_msi_desc_off(irq, i, entry)) { + dev_err(&pdev->dev, + "Failed to set up MSI irq %d\n", + (irq+i)); + return -EINVAL; + } + + irq_set_irq_type((irq+i), IRQ_TYPE_EDGE_RISING); + } + } + + addr = data->res.start + V2M_MSI_SETSPI_NS; + msg.address_hi = (u32)(addr >> 32); + msg.address_lo = (u32)(addr); + msg.data = irq; + write_msi_msg(irq, &msg); + + return 0; +} + +static void gicv2m_mask_irq(struct irq_data *d) +{ + gic_mask_irq(d); + if (d->msi_desc) + mask_msi_irq(d); +} + +static void gicv2m_unmask_irq(struct irq_data *d) +{ + gic_unmask_irq(d); + if (d->msi_desc) + unmask_msi_irq(d); +} + +static bool is_msi_spi_valid(u32 base, u32 num) +{ + if (base < V2M_MIN_SPI) { + pr_err("Invalid MSI base SPI (base:%u)\n", base); + return false; + } + + if ((num == 0) || (base + num > V2M_MAX_SPI)) { + pr_err("Number of SPIs (%u) exceed maximum (%u)\n", + num, V2M_MAX_SPI - V2M_MIN_SPI + 1); + return false; + } + + return true; +} + +static int __init +gicv2m_init_one(struct device_node *node, struct v2m_data **v, + struct gic_chip_data *gic) +{ + int ret; + struct v2m_data *v2m = NULL; + + *v = kzalloc(sizeof(struct v2m_data), GFP_KERNEL); + if (!*v) { + pr_err("Failed to allocate struct v2m_data.\n"); + return -ENOMEM; + } + + v2m = *v; + v2m->gic = gic; + v2m->msi_chip.owner = THIS_MODULE; + v2m->msi_chip.of_node = node; + v2m->msi_chip.setup_irq = gicv2m_setup_msi_irq; + v2m->msi_chip.teardown_irq = gicv2m_teardown_msi_irq; + ret = of_address_to_resource(node, 0, &v2m->res); + if (ret) { + pr_err("Failed to allocate v2m resource.\n"); + goto err_out; + } + + v2m->base = ioremap(v2m->res.start, resource_size(&v2m->res)); + if (!v2m->base) { + pr_err("Failed to map GICv2m resource\n"); + ret = -EINVAL; + goto err_out; + } + + ret = of_pci_msi_chip_add(&v2m->msi_chip); + if (ret) { + pr_info("Failed to add msi_chip.\n"); + goto err_out; + } + + if (!of_property_read_u32(node, "arm,msi-base-spi", &v2m->spi_start) && + !of_property_read_u32(node, "arm,msi-num-spi", &v2m->nr_spis)) { + pr_info("Overwriting V2M MSI_TYPER (base:%u, num:%u)\n", + v2m->spi_start, v2m->nr_spis); + } else { + u32 typer = readl_relaxed(v2m->base + V2M_MSI_TYPER); + + v2m->spi_start = V2M_MSI_TYPER_BASE_SPI(typer); + v2m->nr_spis = V2M_MSI_TYPER_NUM_SPI(typer); + } + + if (!is_msi_spi_valid(v2m->spi_start, v2m->nr_spis)) { + ret = -EINVAL; + goto err_out; + } + + v2m->bm = kzalloc(sizeof(long) * BITS_TO_LONGS(v2m->nr_spis), + GFP_KERNEL); + if (!v2m->bm) { + pr_err("Failed to allocate MSI bitmap\n"); + ret = -ENOMEM; + goto err_out; + } + + spin_lock_init(&v2m->msi_cnt_lock); + + pr_info(" Node %s: range[%#lx : %#lx], SPI[%d:%d]\n", node->name, + (unsigned long)v2m->res.start, (unsigned long)v2m->res.end, + v2m->spi_start, (v2m->spi_start + v2m->nr_spis)); + + return 0; +err_out: + of_pci_msi_chip_remove(&v2m->msi_chip); + if (v2m->base) + iounmap(v2m->base); + kfree(v2m); + return ret; +} + +int __init gicv2m_of_init(struct device_node *node, + struct gic_chip_data *gic, + struct irq_chip *v2m_chip) +{ + int ret = 0; + struct v2m_data *v2m; + struct device_node *child = NULL; + + INIT_LIST_HEAD(&gic->v2m_list); + + v2m_chip->irq_mask = gicv2m_mask_irq; + v2m_chip->irq_unmask = gicv2m_unmask_irq; + + for (;;) { + child = of_get_next_child(node, child); + if (!child) + break; + + if (!of_device_is_compatible(child, "arm,gic-v2m-frame")) + continue; + + if (!of_find_property(child, "msi-controller", NULL)) + continue; + + ret = gicv2m_init_one(child, &v2m, gic); + if (ret) { + of_node_put(node); + break; + } + + list_add_tail(&v2m->list, &gic->v2m_list); + } + + if (ret && list_empty(&gic->v2m_list)) { + pr_warn("Warning: Failed to enable GICv2m support.\n"); + return -EINVAL; + } + + return ret; +} diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c index 4b959e6..9f8e1e0 100644 --- a/drivers/irqchip/irq-gic.c +++ b/drivers/irqchip/irq-gic.c @@ -46,30 +46,9 @@ #include #include "irq-gic-common.h" +#include "irq-gic.h" #include "irqchip.h" -union gic_base { - void __iomem *common_base; - void __percpu * __iomem *percpu_base; -}; - -struct gic_chip_data { - union gic_base dist_base; - union gic_base cpu_base; -#ifdef CONFIG_CPU_PM - u32 saved_spi_enable[DIV_ROUND_UP(1020, 32)]; - u32 saved_spi_conf[DIV_ROUND_UP(1020, 16)]; - u32 saved_spi_target[DIV_ROUND_UP(1020, 4)]; - u32 __percpu *saved_ppi_enable; - u32 __percpu *saved_ppi_conf; -#endif - struct irq_domain *domain; - unsigned int gic_irqs; -#ifdef CONFIG_GIC_NON_BANKED - void __iomem *(*get_base)(union gic_base *); -#endif -}; - static DEFINE_RAW_SPINLOCK(irq_controller_lock); /* @@ -131,15 +110,36 @@ static inline void gic_set_base_accessor(struct gic_chip_data *data, #define gic_set_base_accessor(d, f) #endif +static inline +struct gic_chip_data *irq_data_get_gic_chip_data(struct irq_data *d) +{ + struct gic_chip_data *gic_data; + struct msi_chip *mchip; + struct v2m_data *v2mdat; + + /* + * For MSI, irq_data.chip_data points to struct msi_chip. + * For non-MSI, irq_data.chip_data points to struct gic_chip_data. + */ + if (d->msi_desc) { + mchip = irq_data_get_irq_chip_data(d); + v2mdat = container_of(mchip, struct v2m_data, msi_chip); + gic_data = v2mdat->gic; + } else { + gic_data = irq_data_get_irq_chip_data(d); + } + return gic_data; +} + static inline void __iomem *gic_dist_base(struct irq_data *d) { - struct gic_chip_data *gic_data = irq_data_get_irq_chip_data(d); + struct gic_chip_data *gic_data = irq_data_get_gic_chip_data(d); return gic_data_dist_base(gic_data); } static inline void __iomem *gic_cpu_base(struct irq_data *d) { - struct gic_chip_data *gic_data = irq_data_get_irq_chip_data(d); + struct gic_chip_data *gic_data = irq_data_get_gic_chip_data(d); return gic_data_cpu_base(gic_data); } @@ -151,7 +151,7 @@ static inline unsigned int gic_irq(struct irq_data *d) /* * Routines to acknowledge, disable and enable interrupts */ -static void gic_mask_irq(struct irq_data *d) +void gic_mask_irq(struct irq_data *d) { u32 mask = 1 << (gic_irq(d) % 32); @@ -162,7 +162,7 @@ static void gic_mask_irq(struct irq_data *d) raw_spin_unlock(&irq_controller_lock); } -static void gic_unmask_irq(struct irq_data *d) +void gic_unmask_irq(struct irq_data *d) { u32 mask = 1 << (gic_irq(d) % 32); @@ -325,6 +325,15 @@ static struct irq_chip gic_chip = { .irq_set_wake = gic_set_wake, }; +static struct irq_chip v2m_chip = { + .name = "GICv2m", + .irq_eoi = gic_eoi_irq, + .irq_set_type = gic_set_type, +#ifdef CONFIG_SMP + .irq_set_affinity = gic_set_affinity, +#endif +}; + void __init gic_cascade_irq(unsigned int gic_nr, unsigned int irq) { if (gic_nr >= MAX_GIC_NR) @@ -767,19 +776,29 @@ void __init gic_init_physaddr(struct device_node *node) static int gic_irq_domain_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw) { + struct gic_chip_data *gic = d->host_data; + + irq_set_chip_data(irq, gic); + if (hw < 32) { + /* PPIs */ irq_set_percpu_devid(irq); irq_set_chip_and_handler(irq, &gic_chip, handle_percpu_devid_irq); set_irq_flags(irq, IRQF_VALID | IRQF_NOAUTOEN); } else { - irq_set_chip_and_handler(irq, &gic_chip, - handle_fasteoi_irq); + /* SPIs */ set_irq_flags(irq, IRQF_VALID | IRQF_PROBE); - gic_routable_irq_domain_ops->map(d, irq, hw); + if (!gicv2m_check_msi_range(gic, hw)) { + irq_set_chip_and_handler(irq, &gic_chip, + handle_fasteoi_irq); + gic_routable_irq_domain_ops->map(d, irq, hw); + } else { + irq_set_chip_and_handler(irq, &v2m_chip, + handle_fasteoi_irq); + } } - irq_set_chip_data(irq, d->host_data); return 0; } @@ -1010,6 +1029,9 @@ gic_of_init(struct device_node *node, struct device_node *parent) if (of_property_read_u32(node, "cpu-offset", &percpu_offset)) percpu_offset = 0; + if (IS_ENABLED(CONFIG_ARM_GIC_V2M)) + gicv2m_of_init(node, &gic_data[gic_cnt], &v2m_chip); + gic_init_bases(gic_cnt, -1, dist_base, cpu_base, percpu_offset, node); if (!gic_cnt) gic_init_physaddr(node); diff --git a/drivers/irqchip/irq-gic.h b/drivers/irqchip/irq-gic.h new file mode 100644 index 0000000..3021665 --- /dev/null +++ b/drivers/irqchip/irq-gic.h @@ -0,0 +1,54 @@ +#ifndef _IRQ_GIC_H_ +#define _IRQ_GIC_H_ + +#include +#include + +union gic_base { + void __iomem *common_base; + void __percpu * __iomem *percpu_base; +}; + +struct gic_chip_data; + +struct v2m_data { +#ifdef CONFIG_ARM_GIC_V2M + struct list_head list; + spinlock_t msi_cnt_lock; + struct msi_chip msi_chip; + struct resource res; /* GICv2m resource */ + void __iomem *base; /* GICv2m virt address */ + unsigned int spi_start; /* The SPI number that MSIs start */ + unsigned int nr_spis; /* The number of SPIs for MSIs */ + unsigned long *bm; /* MSI vector bitmap */ + struct gic_chip_data *gic; +#endif +}; + +struct gic_chip_data { + union gic_base dist_base; + union gic_base cpu_base; +#ifdef CONFIG_CPU_PM + u32 saved_spi_enable[DIV_ROUND_UP(1020, 32)]; + u32 saved_spi_conf[DIV_ROUND_UP(1020, 16)]; + u32 saved_spi_target[DIV_ROUND_UP(1020, 4)]; + u32 __percpu *saved_ppi_enable; + u32 __percpu *saved_ppi_conf; +#endif + struct irq_domain *domain; + unsigned int gic_irqs; +#ifdef CONFIG_GIC_NON_BANKED + void __iomem *(*get_base)(union gic_base *); +#endif +#ifdef CONFIG_ARM_GIC_V2M + struct list_head v2m_list; +#endif +}; + +void gic_mask_irq(struct irq_data *d); +void gic_unmask_irq(struct irq_data *d); +int gicv2m_of_init(struct device_node *node, struct gic_chip_data *gic, + struct irq_chip *v2m_chip) __init; +bool gicv2m_check_msi_range(struct gic_chip_data *gic, irq_hw_number_t hw); + +#endif /* _IRQ_GIC_H_ */