From patchwork Fri Feb 21 08:56:41 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gerd Hoffmann X-Patchwork-Id: 3695101 Return-Path: X-Original-To: patchwork-linux-fbdev@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 708D79F382 for ; Fri, 21 Feb 2014 08:58:11 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 9DF7D2017D for ; Fri, 21 Feb 2014 08:58:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BC92F20179 for ; Fri, 21 Feb 2014 08:58:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754355AbaBUI5J (ORCPT ); Fri, 21 Feb 2014 03:57:09 -0500 Received: from mx1.redhat.com ([209.132.183.28]:5008 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754028AbaBUI5H (ORCPT ); Fri, 21 Feb 2014 03:57:07 -0500 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id s1L8v3Bs015252 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Fri, 21 Feb 2014 03:57:03 -0500 Received: from nilsson.home.kraxel.org (vpn1-7-129.ams2.redhat.com [10.36.7.129]) by int-mx10.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id s1L8v2Er026504; Fri, 21 Feb 2014 03:57:03 -0500 Received: by nilsson.home.kraxel.org (Postfix, from userid 500) id 2EE248061E; Fri, 21 Feb 2014 09:57:02 +0100 (CET) From: Gerd Hoffmann To: linux-fbdev@vger.kernel.org Cc: linux-kernel@vger.kernel.org, gregkh@linuxfoundation.org, kys@microsoft.com, haiyangz@microsoft.com, jasowang@redhat.com, devel@linuxdriverproject.org (open list:Hyper-V CORE AND...) Subject: [PATCH 1/4] Drivers: hv: vmbus: Extract the mmio information from DSDT Date: Fri, 21 Feb 2014 09:56:41 +0100 Message-Id: <1392973004-28215-2-git-send-email-kraxel@redhat.com> In-Reply-To: <1392973004-28215-1-git-send-email-kraxel@redhat.com> References: <1392973004-28215-1-git-send-email-kraxel@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.23 Sender: linux-fbdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org X-Spam-Status: No, score=-7.9 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: "K. Y. Srinivasan" On Gen2 firmware, Hyper-V does not emulate the PCI bus. However, the MMIO information is packaged up in DSDT. Extract this information and export it for use by the synthetic framebuffer driver. This is the only driver that needs this currently. In this version of the patch mmio, I have updated the hyperv header file (linux/hyperv.h) with mmio definitions. Signed-off-by: K. Y. Srinivasan Signed-off-by: Greg Kroah-Hartman --- drivers/hv/vmbus_drv.c | 45 ++++++++++++++++++++++++++++++++------------- include/linux/hyperv.h | 3 +++ 2 files changed, 35 insertions(+), 13 deletions(-) diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c index 077bb1b..b37c91b 100644 --- a/drivers/hv/vmbus_drv.c +++ b/drivers/hv/vmbus_drv.c @@ -43,6 +43,10 @@ static struct acpi_device *hv_acpi_dev; static struct tasklet_struct msg_dpc; static struct completion probe_event; static int irq; +u64 hyperv_mmio_start; +EXPORT_SYMBOL_GPL(hyperv_mmio_start); +u64 hyperv_mmio_size; +EXPORT_SYMBOL_GPL(hyperv_mmio_size); static int vmbus_exists(void) { @@ -886,18 +890,19 @@ void vmbus_device_unregister(struct hv_device *device_obj) /* - * VMBUS is an acpi enumerated device. Get the the IRQ information - * from DSDT. + * VMBUS is an acpi enumerated device. Get the the information we + * need from DSDT. */ -static acpi_status vmbus_walk_resources(struct acpi_resource *res, void *irq) +static acpi_status vmbus_walk_resources(struct acpi_resource *res, void *ctx) { + switch (res->type) { + case ACPI_RESOURCE_TYPE_IRQ: + irq = res->data.irq.interrupts[0]; - if (res->type == ACPI_RESOURCE_TYPE_IRQ) { - struct acpi_resource_irq *irqp; - irqp = &res->data.irq; - - *((unsigned int *)irq) = irqp->interrupts[0]; + case ACPI_RESOURCE_TYPE_ADDRESS64: + hyperv_mmio_start = res->data.address64.minimum; + hyperv_mmio_size = res->data.address64.address_length; } return AE_OK; @@ -906,18 +911,32 @@ static acpi_status vmbus_walk_resources(struct acpi_resource *res, void *irq) static int vmbus_acpi_add(struct acpi_device *device) { acpi_status result; + int ret_val = -ENODEV; hv_acpi_dev = device; result = acpi_walk_resources(device->handle, METHOD_NAME__CRS, - vmbus_walk_resources, &irq); + vmbus_walk_resources, NULL); - if (ACPI_FAILURE(result)) { - complete(&probe_event); - return -ENODEV; + if (ACPI_FAILURE(result)) + goto acpi_walk_err; + /* + * The parent of the vmbus acpi device (Gen2 firmware) is the VMOD that + * has the mmio ranges. Get that. + */ + if (device->parent) { + result = acpi_walk_resources(device->parent->handle, + METHOD_NAME__CRS, + vmbus_walk_resources, NULL); + + if (ACPI_FAILURE(result)) + goto acpi_walk_err; } + ret_val = 0; + +acpi_walk_err: complete(&probe_event); - return 0; + return ret_val; } static const struct acpi_device_id vmbus_acpi_device_ids[] = { diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h index 344883d..be3028f 100644 --- a/include/linux/hyperv.h +++ b/include/linux/hyperv.h @@ -1459,6 +1459,9 @@ int hv_vss_init(struct hv_util_service *); void hv_vss_deinit(void); void hv_vss_onchannelcallback(void *); +extern u64 hyperv_mmio_start; +extern u64 hyperv_mmio_size; + /* * Negotiated version with the Host. */