From patchwork Sat Mar 15 00:19:29 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roman Kisel X-Patchwork-Id: 14017619 X-Patchwork-Delegate: kw@linux.com Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by smtp.subspace.kernel.org (Postfix) with ESMTP id EBF6E481B6; Sat, 15 Mar 2025 00:19:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=13.77.154.182 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741997979; cv=none; b=CqiH12D3yxQE4ay5kNiwGh1i8zs18crIJ8DFSimRHGp3rYX8FRw9jODfBsTQCo7KBBF7m2h0WTAnBv+hULPfhwGtWGX+2SbzFAgvC2zX88FuLF7d2HbhGtOPC/yRF4gkmaXVkOInyHZdR8MZuejQhiuSIPBGLaedpDUhND9thGo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741997979; c=relaxed/simple; bh=QUapfEldpyCw648cR7hTfLhDYfYdHNw9I24sIY3wewA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=B/pfeNCoorsF7D+a0E359WXo3f8ZOSlpQdHs/vOeDv9TjinNnWF/H6G4mcxUUC4EIRczOm03bStqYFeOX9dYTsYObSFqLJ7peT5H4AiOiXieOonAzfSnu52FHmXb2DryvSiYi4XbUHaLUPhtluKkEEYzcF7nvQYmQ2yU+Ipfaj0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.microsoft.com; spf=pass smtp.mailfrom=linux.microsoft.com; dkim=pass (1024-bit key) header.d=linux.microsoft.com header.i=@linux.microsoft.com header.b=Os6o5XJE; arc=none smtp.client-ip=13.77.154.182 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.microsoft.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.microsoft.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.microsoft.com header.i=@linux.microsoft.com header.b="Os6o5XJE" Received: from romank-3650.corp.microsoft.com (unknown [131.107.160.188]) by linux.microsoft.com (Postfix) with ESMTPSA id 64D98203345E; Fri, 14 Mar 2025 17:19:36 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 64D98203345E DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1741997976; bh=k4K++fqiP84qacsZ/10/m3tNXa1bo+IGgMpwd09KRMY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Os6o5XJEUqFmk0cEU1prfpmSEvi8J0J1SMLVoL1B2wsQF8hhRX0nhbJ4vbU6l/+8k 7evvtXPnRoZHlBNxnvUp8RiH1JMArPoMnvOWMK/I/xbe7zadktk0i6JVl7L1IE6o8+ dGUm+h9+2bmkj/U+ywtCVNoDhpOGYSRUQpkiciU8= From: Roman Kisel To: arnd@arndb.de, bhelgaas@google.com, bp@alien8.de, catalin.marinas@arm.com, conor+dt@kernel.org, dan.carpenter@linaro.org, dave.hansen@linux.intel.com, decui@microsoft.com, haiyangz@microsoft.com, hpa@zytor.com, joey.gouly@arm.com, krzk+dt@kernel.org, kw@linux.com, kys@microsoft.com, lenb@kernel.org, lpieralisi@kernel.org, manivannan.sadhasivam@linaro.org, mark.rutland@arm.com, maz@kernel.org, mingo@redhat.com, oliver.upton@linux.dev, rafael@kernel.org, robh@kernel.org, ssengar@linux.microsoft.com, sudeep.holla@arm.com, suzuki.poulose@arm.com, tglx@linutronix.de, wei.liu@kernel.org, will@kernel.org, yuzenghui@huawei.com, devicetree@vger.kernel.org, kvmarm@lists.linux.dev, linux-acpi@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, x86@kernel.org Cc: apais@microsoft.com, benhill@microsoft.com, bperkins@microsoft.com, sunilmut@microsoft.com Subject: [PATCH hyperv-next v6 09/11] Drivers: hv: vmbus: Introduce hv_get_vmbus_root_device() Date: Fri, 14 Mar 2025 17:19:29 -0700 Message-ID: <20250315001931.631210-10-romank@linux.microsoft.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250315001931.631210-1-romank@linux.microsoft.com> References: <20250315001931.631210-1-romank@linux.microsoft.com> Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 The ARM64 PCI code for hyperv needs to know the VMBus root device, and it is private. Provide a function that returns it. Rename it from "hv_dev" as "hv_dev" as a symbol is very overloaded. No functional changes. Signed-off-by: Roman Kisel Reviewed-by: Michael Kelley --- drivers/hv/vmbus_drv.c | 23 +++++++++++++++-------- include/linux/hyperv.h | 2 ++ 2 files changed, 17 insertions(+), 8 deletions(-) diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c index e8f2c3e92d1f..df18b4070b01 100644 --- a/drivers/hv/vmbus_drv.c +++ b/drivers/hv/vmbus_drv.c @@ -45,7 +45,8 @@ struct vmbus_dynid { struct hv_vmbus_device_id id; }; -static struct device *hv_dev; +/* VMBus Root Device */ +static struct device *vmbus_root_device; static int hyperv_cpuhp_online; @@ -80,9 +81,15 @@ static struct resource *fb_mmio; static struct resource *hyperv_mmio; static DEFINE_MUTEX(hyperv_mmio_lock); +struct device *hv_get_vmbus_root_device(void) +{ + return vmbus_root_device; +} +EXPORT_SYMBOL_GPL(hv_get_vmbus_root_device); + static int vmbus_exists(void) { - if (hv_dev == NULL) + if (vmbus_root_device == NULL) return -ENODEV; return 0; @@ -861,7 +868,7 @@ static int vmbus_dma_configure(struct device *child_device) * On x86/x64 coherence is assumed and these calls have no effect. */ hv_setup_dma_ops(child_device, - device_get_dma_attr(hv_dev) == DEV_DMA_COHERENT); + device_get_dma_attr(vmbus_root_device) == DEV_DMA_COHERENT); return 0; } @@ -1930,7 +1937,7 @@ int vmbus_device_register(struct hv_device *child_device_obj) &child_device_obj->channel->offermsg.offer.if_instance); child_device_obj->device.bus = &hv_bus; - child_device_obj->device.parent = hv_dev; + child_device_obj->device.parent = vmbus_root_device; child_device_obj->device.release = vmbus_device_release; child_device_obj->device.dma_parms = &child_device_obj->dma_parms; @@ -2292,7 +2299,7 @@ static int vmbus_acpi_add(struct platform_device *pdev) struct acpi_device *ancestor; struct acpi_device *device = ACPI_COMPANION(&pdev->dev); - hv_dev = &device->dev; + vmbus_root_device = &device->dev; /* * Older versions of Hyper-V for ARM64 fail to include the _CCA @@ -2378,7 +2385,7 @@ static int vmbus_device_add(struct platform_device *pdev) struct device_node *np = pdev->dev.of_node; int ret; - hv_dev = &pdev->dev; + vmbus_root_device = &pdev->dev; ret = of_range_parser_init(&parser, np); if (ret) @@ -2696,7 +2703,7 @@ static int __init hv_acpi_init(void) if (ret) return ret; - if (!hv_dev) { + if (!vmbus_root_device) { ret = -ENODEV; goto cleanup; } @@ -2727,7 +2734,7 @@ static int __init hv_acpi_init(void) cleanup: platform_driver_unregister(&vmbus_platform_driver); - hv_dev = NULL; + vmbus_root_device = NULL; return ret; } diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h index 675959fb97ba..1f310fbbc4f9 100644 --- a/include/linux/hyperv.h +++ b/include/linux/hyperv.h @@ -1277,6 +1277,8 @@ static inline void *hv_get_drvdata(struct hv_device *dev) return dev_get_drvdata(&dev->device); } +struct device *hv_get_vmbus_root_device(void); + struct hv_ring_buffer_debug_info { u32 current_interrupt_mask; u32 current_read_index;