From mboxrd@z Thu Jan 1 00:00:00 1970 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 6EAB5C05027 for ; Thu, 9 Feb 2023 12:17:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230029AbjBIMR1 (ORCPT ); Thu, 9 Feb 2023 07:17:27 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58480 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230127AbjBIMRN (ORCPT ); Thu, 9 Feb 2023 07:17:13 -0500 Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 02B67DBE5; Thu, 9 Feb 2023 04:16:53 -0800 (PST) Received: from linuxonhyperv3.guj3yctzbm1etfxqx2vob5hsef.xx.internal.cloudapp.net (linux.microsoft.com [13.77.154.182]) by linux.microsoft.com (Postfix) with ESMTPSA id 09A7020C8AF4; Thu, 9 Feb 2023 04:15:44 -0800 (PST) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 09A7020C8AF4 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1675944944; bh=tcypQPfMSnfnYp3JE6Trh1CtkCM96kzsYYRghzAy49I=; h=From:To:Subject:Date:In-Reply-To:References:From; b=bMVGNRK2D9pFEslGphWYzkl5YMZc6Ohj7OrdblC71KSHkCd3cjxa4eb3gt+Wj+Y0+ ohsGiJ/OT2VGXVCzJ6a3EEkeP0Z5cpLWfmOSOnO8uFq0NAMMbHvjHNwSsGE0+WNwFJ xS/LDWhVoVX1iHsfc9Tsc+tubf5H8zqef5++b7IY= From: Saurabh Sengar To: robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, daniel.lezcano@linaro.org, tglx@linutronix.de, virtualization@lists.linux-foundation.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org, mikelley@microsoft.com, ssengar@linux.microsoft.com, dphadke@linux.microsoft.com Subject: [PATCH v5 5/5] Driver: VMBus: Add device tree support Date: Thu, 9 Feb 2023 04:15:39 -0800 Message-Id: <1675944939-22631-6-git-send-email-ssengar@linux.microsoft.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1675944939-22631-1-git-send-email-ssengar@linux.microsoft.com> References: <1675944939-22631-1-git-send-email-ssengar@linux.microsoft.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Update the driver to support device tree boot as well along with ACPI. At present the device tree parsing only provides the mmio region info and is not the exact copy of ACPI parsing. This is sufficient to cater all the current device tree usecases for VMBus. Currently device tree is supported only for x86 systems. Signed-off-by: Saurabh Sengar --- - Removed #else for device tree parsing code. This should help better test coverage. - Fix macro '__maybe_unused' warning - Added below options in Kconfig to enable device tree options for HYPERV select OF if !ACPI select OF_EARLY_FLATTREE if !ACPI drivers/hv/Kconfig | 6 +++-- drivers/hv/vmbus_drv.c | 60 ++++++++++++++++++++++++++++++++++++++++-- 2 files changed, 62 insertions(+), 4 deletions(-) diff --git a/drivers/hv/Kconfig b/drivers/hv/Kconfig index 0747a8f1fcee..1a55bf32d195 100644 --- a/drivers/hv/Kconfig +++ b/drivers/hv/Kconfig @@ -4,11 +4,13 @@ menu "Microsoft Hyper-V guest support" config HYPERV tristate "Microsoft Hyper-V client drivers" - depends on ACPI && ((X86 && X86_LOCAL_APIC && HYPERVISOR_GUEST) \ - || (ARM64 && !CPU_BIG_ENDIAN)) + depends on (X86 && X86_LOCAL_APIC && HYPERVISOR_GUEST) \ + || (ACPI && ARM64 && !CPU_BIG_ENDIAN) select PARAVIRT select X86_HV_CALLBACK_VECTOR if X86 select VMAP_PFN + select OF if !ACPI + select OF_EARLY_FLATTREE if !ACPI help Select this option to run Linux as a Hyper-V client operating system. diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c index 73497157a23a..02f6bab61c37 100644 --- a/drivers/hv/vmbus_drv.c +++ b/drivers/hv/vmbus_drv.c @@ -20,6 +20,7 @@ #include #include #include +#include #include #include #include @@ -2152,7 +2153,7 @@ void vmbus_device_unregister(struct hv_device *device_obj) device_unregister(&device_obj->device); } - +#ifdef CONFIG_ACPI /* * VMBUS is an acpi enumerated device. Get the information we * need from DSDT. @@ -2262,6 +2263,7 @@ static acpi_status vmbus_walk_resources(struct acpi_resource *res, void *ctx) return AE_OK; } +#endif static void vmbus_mmio_remove(void) { @@ -2282,7 +2284,7 @@ static void vmbus_mmio_remove(void) } } -static void vmbus_reserve_fb(void) +static void __maybe_unused vmbus_reserve_fb(void) { resource_size_t start = 0, size; struct pci_dev *pdev; @@ -2442,6 +2444,7 @@ void vmbus_free_mmio(resource_size_t start, resource_size_t size) } EXPORT_SYMBOL_GPL(vmbus_free_mmio); +#ifdef CONFIG_ACPI static int vmbus_acpi_add(struct platform_device *pdev) { acpi_status result; @@ -2494,10 +2497,50 @@ static int vmbus_acpi_add(struct platform_device *pdev) vmbus_mmio_remove(); return ret_val; } +#endif + +static int vmbus_device_add(struct platform_device *pdev) +{ + struct resource **cur_res = &hyperv_mmio; + struct of_range range; + struct of_range_parser parser; + struct device_node *np; + int ret = 0; + + hv_dev = &pdev->dev; + np = pdev->dev.of_node; + + ret = of_range_parser_init(&parser, np); + if (ret) { + dev_err(hv_dev, "Failed to parse resources.\n"); + return ret; + } + + for_each_of_range(&parser, &range) { + struct resource *res; + + res = kzalloc(sizeof(*res), GFP_ATOMIC); + if (!res) + return -ENOMEM; + + res->name = "hyperv mmio"; + res->flags = IORESOURCE_MEM | IORESOURCE_MEM_64; + res->start = range.pci_addr; + res->end = range.pci_addr + range.size; + + *cur_res = res; + cur_res = &res->sibling; + } + + return ret; +} static int vmbus_platform_driver_probe(struct platform_device *pdev) { +#ifdef CONFIG_ACPI return vmbus_acpi_add(pdev); +#endif + return vmbus_device_add(pdev); } static int vmbus_platform_driver_remove(struct platform_device *pdev) @@ -2643,12 +2686,24 @@ static int vmbus_bus_resume(struct device *dev) #define vmbus_bus_resume NULL #endif /* CONFIG_PM_SLEEP */ +static const __maybe_unused struct of_device_id vmbus_of_match[] = { + { + .compatible = "microsoft,vmbus", + }, + { + /* sentinel */ + }, +}; +MODULE_DEVICE_TABLE(of, vmbus_of_match); + +#ifdef CONFIG_ACPI static const struct acpi_device_id vmbus_acpi_device_ids[] = { {"VMBUS", 0}, {"VMBus", 0}, {"", 0}, }; MODULE_DEVICE_TABLE(acpi, vmbus_acpi_device_ids); +#endif /* * Note: we must use the "no_irq" ops, otherwise hibernation can not work with @@ -2677,6 +2732,7 @@ static struct platform_driver vmbus_platform_driver = { .driver = { .name = "vmbus", .acpi_match_table = ACPI_PTR(vmbus_acpi_device_ids), + .of_match_table = of_match_ptr(vmbus_of_match), .pm = &vmbus_bus_pm, .probe_type = PROBE_FORCE_SYNCHRONOUS, } -- 2.34.1