From nobody Sat Sep 13 18:59:45 2025 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 5BB74C38142 for ; Tue, 31 Jan 2023 18:10:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231665AbjAaSK0 (ORCPT ); Tue, 31 Jan 2023 13:10:26 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37892 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230013AbjAaSKT (ORCPT ); Tue, 31 Jan 2023 13:10:19 -0500 Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id A523525E09; Tue, 31 Jan 2023 10:10:17 -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 6AA1120DE346; Tue, 31 Jan 2023 10:10:17 -0800 (PST) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 6AA1120DE346 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1675188617; bh=ANW5SmReljM/ZqznaSaYgwM0EI1m+kZRgs2ecj5BRas=; h=From:To:Subject:Date:In-Reply-To:References:From; b=rj3ua2kL83Z0agsaWPMMpmsz1F8WNVCqvekG8Bacm/FGsJJREglCeP792UZTDVAZN SgCEyziKFYAK/PpxYS0Zmj3uZKzQOX6MP5doiPPbvOiGZXS/ldV1KVAMoR340iH0eC QGhIwMbXB9rjwYA/E3Zd72ASp/2QcJ1bN/TaCSvw= 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@microsoft.com Subject: [PATCH v2 3/6] Drivers: hv: vmbus: Convert acpi_device to platform_device Date: Tue, 31 Jan 2023 10:10:06 -0800 Message-Id: <1675188609-20913-4-git-send-email-ssengar@linux.microsoft.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1675188609-20913-1-git-send-email-ssengar@linux.microsoft.com> References: <1675188609-20913-1-git-send-email-ssengar@linux.microsoft.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Use more generic platform device instead of acpi device. Also rename the function vmbus_acpi_remove to more generic name vmbus_mmio_remove. Signed-off-by: Saurabh Sengar --- drivers/hv/vmbus_drv.c | 78 +++++++++++++++++++++++++----------------- 1 file changed, 46 insertions(+), 32 deletions(-) diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c index d24dd65b33d4..49030e756b9f 100644 --- a/drivers/hv/vmbus_drv.c +++ b/drivers/hv/vmbus_drv.c @@ -12,6 +12,7 @@ #include #include #include +#include #include #include #include @@ -44,7 +45,7 @@ struct vmbus_dynid { struct hv_vmbus_device_id id; }; =20 -static struct acpi_device *hv_acpi_dev; +static struct platform_device *hv_dev; =20 static int hyperv_cpuhp_online; =20 @@ -143,7 +144,7 @@ static DEFINE_MUTEX(hyperv_mmio_lock); =20 static int vmbus_exists(void) { - if (hv_acpi_dev =3D=3D NULL) + if (hv_dev =3D=3D NULL) return -ENODEV; =20 return 0; @@ -932,7 +933,7 @@ static int vmbus_dma_configure(struct device *child_dev= ice) * On x86/x64 coherence is assumed and these calls have no effect. */ hv_setup_dma_ops(child_device, - device_get_dma_attr(&hv_acpi_dev->dev) =3D=3D DEV_DMA_COHERENT); + device_get_dma_attr(&hv_dev->dev) =3D=3D DEV_DMA_COHERENT); return 0; } =20 @@ -2090,7 +2091,7 @@ int vmbus_device_register(struct hv_device *child_dev= ice_obj) &child_device_obj->channel->offermsg.offer.if_instance); =20 child_device_obj->device.bus =3D &hv_bus; - child_device_obj->device.parent =3D &hv_acpi_dev->dev; + child_device_obj->device.parent =3D &hv_dev->dev; child_device_obj->device.release =3D vmbus_device_release; =20 child_device_obj->device.dma_parms =3D &child_device_obj->dma_parms; @@ -2262,7 +2263,7 @@ static acpi_status vmbus_walk_resources(struct acpi_r= esource *res, void *ctx) return AE_OK; } =20 -static void vmbus_acpi_remove(struct acpi_device *device) +static void vmbus_mmio_remove(void) { struct resource *cur_res; struct resource *next_res; @@ -2441,13 +2442,15 @@ void vmbus_free_mmio(resource_size_t start, resourc= e_size_t size) } EXPORT_SYMBOL_GPL(vmbus_free_mmio); =20 -static int vmbus_acpi_add(struct acpi_device *device) +static int vmbus_acpi_add(struct platform_device *pdev) { acpi_status result; int ret_val =3D -ENODEV; - struct acpi_device *ancestor; + struct platform_device *ancestor; + struct acpi_device *adev =3D to_acpi_device(&pdev->dev); =20 - hv_acpi_dev =3D device; + hv_dev =3D pdev; + adev->fwnode.dev =3D &pdev->dev; =20 /* * Older versions of Hyper-V for ARM64 fail to include the _CCA @@ -2456,15 +2459,16 @@ static int vmbus_acpi_add(struct acpi_device *devic= e) * up the ACPI device to behave as if _CCA is present and indicates * hardware coherence. */ - ACPI_COMPANION_SET(&device->dev, device); + ACPI_COMPANION_SET(&pdev->dev, ACPI_COMPANION(&pdev->dev)); if (IS_ENABLED(CONFIG_ACPI_CCA_REQUIRED) && - device_get_dma_attr(&device->dev) =3D=3D DEV_DMA_NOT_SUPPORTED) { + device_get_dma_attr(&pdev->dev) =3D=3D DEV_DMA_NOT_SUPPORTED) { + struct acpi_device *adev_node =3D ACPI_COMPANION(&pdev->dev); pr_info("No ACPI _CCA found; assuming coherent device I/O\n"); - device->flags.cca_seen =3D true; - device->flags.coherent_dma =3D true; + adev_node->flags.cca_seen =3D true; + adev_node->flags.coherent_dma =3D true; } =20 - result =3D acpi_walk_resources(device->handle, METHOD_NAME__CRS, + result =3D acpi_walk_resources(ACPI_HANDLE(&pdev->dev), METHOD_NAME__CRS, vmbus_walk_resources, NULL); =20 if (ACPI_FAILURE(result)) @@ -2473,9 +2477,9 @@ static int vmbus_acpi_add(struct acpi_device *device) * Some ancestor of the vmbus acpi device (Gen1 or Gen2 * firmware) is the VMOD that has the mmio ranges. Get that. */ - for (ancestor =3D acpi_dev_parent(device); ancestor; - ancestor =3D acpi_dev_parent(ancestor)) { - result =3D acpi_walk_resources(ancestor->handle, METHOD_NAME__CRS, + for (ancestor =3D to_platform_device(pdev->dev.parent); ancestor; + ancestor =3D to_platform_device(ancestor->dev.parent)) { + result =3D acpi_walk_resources(ACPI_HANDLE(&ancestor->dev), METHOD_NAME_= _CRS, vmbus_walk_resources, NULL); =20 if (ACPI_FAILURE(result)) @@ -2489,10 +2493,21 @@ static int vmbus_acpi_add(struct acpi_device *devic= e) =20 acpi_walk_err: if (ret_val) - vmbus_acpi_remove(device); + vmbus_mmio_remove(); return ret_val; } =20 +static int vmbus_platform_driver_probe(struct platform_device *pdev) +{ + return vmbus_acpi_add(pdev); +} + +static int vmbus_platform_driver_remove(struct platform_device *pdev) +{ + vmbus_mmio_remove(); + return 0; +} + #ifdef CONFIG_PM_SLEEP static int vmbus_bus_suspend(struct device *dev) { @@ -2658,15 +2673,15 @@ static const struct dev_pm_ops vmbus_bus_pm =3D { .restore_noirq =3D vmbus_bus_resume }; =20 -static struct acpi_driver vmbus_acpi_driver =3D { - .name =3D "vmbus", - .ids =3D vmbus_acpi_device_ids, - .ops =3D { - .add =3D vmbus_acpi_add, - .remove =3D vmbus_acpi_remove, - }, - .drv.pm =3D &vmbus_bus_pm, - .drv.probe_type =3D PROBE_FORCE_SYNCHRONOUS, +static struct platform_driver vmbus_platform_driver =3D { + .probe =3D vmbus_platform_driver_probe, + .remove =3D vmbus_platform_driver_remove, + .driver =3D { + .name =3D "vmbus", + .acpi_match_table =3D ACPI_PTR(vmbus_acpi_device_ids), + .pm =3D &vmbus_bus_pm, + .probe_type =3D PROBE_FORCE_SYNCHRONOUS, + } }; =20 static void hv_kexec_handler(void) @@ -2750,12 +2765,11 @@ static int __init hv_acpi_init(void) /* * Get ACPI resources first. */ - ret =3D acpi_bus_register_driver(&vmbus_acpi_driver); - + ret =3D platform_driver_register(&vmbus_platform_driver); if (ret) return ret; =20 - if (!hv_acpi_dev) { + if (!hv_dev) { ret =3D -ENODEV; goto cleanup; } @@ -2785,8 +2799,8 @@ static int __init hv_acpi_init(void) return 0; =20 cleanup: - acpi_bus_unregister_driver(&vmbus_acpi_driver); - hv_acpi_dev =3D NULL; + platform_driver_unregister(&vmbus_platform_driver); + hv_dev =3D NULL; return ret; } =20 @@ -2839,7 +2853,7 @@ static void __exit vmbus_exit(void) =20 cpuhp_remove_state(hyperv_cpuhp_online); hv_synic_free(); - acpi_bus_unregister_driver(&vmbus_acpi_driver); + platform_driver_unregister(&vmbus_platform_driver); } =20 =20 --=20 2.25.1