From patchwork Fri Feb 21 05:50:11 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Haiyang Zhang X-Patchwork-Id: 3693691 Return-Path: X-Original-To: patchwork-linux-fbdev@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 A0A8CBF40C for ; Fri, 21 Feb 2014 04:59:43 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id A885E2018A for ; Fri, 21 Feb 2014 04:59:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AF3FB20179 for ; Fri, 21 Feb 2014 04:59:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753583AbaBUE7S (ORCPT ); Thu, 20 Feb 2014 23:59:18 -0500 Received: from p3plsmtps2ded03.prod.phx3.secureserver.net ([208.109.80.60]:58830 "EHLO p3plsmtps2ded03.prod.phx3.secureserver.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753516AbaBUE65 (ORCPT ); Thu, 20 Feb 2014 23:58:57 -0500 Received: from linuxonhyperv.com ([72.167.245.219]) by p3plsmtps2ded03.prod.phx3.secureserver.net with : DED : id Usyx1n02N4kklxU01syxKd; Thu, 20 Feb 2014 21:58:57 -0700 x-originating-ip: 72.167.245.219 Received: by linuxonhyperv.com (Postfix, from userid 503) id 582671902DC; Thu, 20 Feb 2014 21:50:29 -0800 (PST) From: Haiyang Zhang To: plagnioj@jcrosoft.com, tomi.valkeinen@ti.com, akpm@linux-foundation.org, linux-fbdev@vger.kernel.org Cc: haiyangz@microsoft.com, kys@microsoft.com, olaf@aepfle.de, jasowang@redhat.com, linux-kernel@vger.kernel.org, driverdev-devel@linuxdriverproject.org Subject: [PATCH v2,2/2] hyperv_fb: Add support for Gen2 VM Date: Thu, 20 Feb 2014 21:50:11 -0800 Message-Id: <1392961811-11960-3-git-send-email-haiyangz@microsoft.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1392961811-11960-1-git-send-email-haiyangz@microsoft.com> References: <1392961811-11960-1-git-send-email-haiyangz@microsoft.com> Sender: linux-fbdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org X-Spam-Status: No, score=-7.5 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 This patch enables Hyper-V FB driver to run on Gen2 VM. The Gen2 VM provides MMIO area for synthetic video from ACPI module, which is exported by vmbus. The generic video is provided by UEFI. PCI video in Gen1 is no longer available. To support synthetic video on Hyper-V Gen2 VM, this patch updated code related to the changes above. Signed-off-by: Haiyang Zhang Reviewed-by: K. Y. Srinivasan --- drivers/video/hyperv_fb.c | 60 ++++++++++++++++++++++++++++++-------------- 1 files changed, 41 insertions(+), 19 deletions(-) diff --git a/drivers/video/hyperv_fb.c b/drivers/video/hyperv_fb.c index bbcc8c0..5db1f20 100644 --- a/drivers/video/hyperv_fb.c +++ b/drivers/video/hyperv_fb.c @@ -42,6 +42,7 @@ #include #include #include +#include #include @@ -461,13 +462,13 @@ static int synthvid_connect_vsp(struct hv_device *hdev) goto error; } - if (par->synthvid_version == SYNTHVID_VERSION_WIN7) { + if (par->synthvid_version == SYNTHVID_VERSION_WIN7) screen_depth = SYNTHVID_DEPTH_WIN7; - screen_fb_size = SYNTHVID_FB_SIZE_WIN7; - } else { + else screen_depth = SYNTHVID_DEPTH_WIN8; - screen_fb_size = SYNTHVID_FB_SIZE_WIN8; - } + + screen_fb_size = hdev->channel->offermsg.offer. + mmio_megabytes * 1024 * 1024; return 0; @@ -635,22 +636,33 @@ static void hvfb_get_option(struct fb_info *info) /* Get framebuffer memory from Hyper-V video pci space */ static int hvfb_getmem(struct fb_info *info) { - struct pci_dev *pdev; + struct pci_dev *pdev = NULL; ulong fb_phys; void __iomem *fb_virt; + int gen2vm = efi_enabled(EFI_BOOT); - pdev = pci_get_device(PCI_VENDOR_ID_MICROSOFT, + if (gen2vm) { + if (!hyperv_mmio_start || hyperv_mmio_size < screen_fb_size) { + pr_err("Unable to find ACPI MMIO area\n"); + return -ENODEV; + } + + fb_phys = hyperv_mmio_start; + } else { + pdev = pci_get_device(PCI_VENDOR_ID_MICROSOFT, PCI_DEVICE_ID_HYPERV_VIDEO, NULL); - if (!pdev) { - pr_err("Unable to find PCI Hyper-V video\n"); - return -ENODEV; - } + if (!pdev) { + pr_err("Unable to find PCI Hyper-V video\n"); + return -ENODEV; + } - if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM) || - pci_resource_len(pdev, 0) < screen_fb_size) - goto err1; + if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM) || + pci_resource_len(pdev, 0) < screen_fb_size) + goto err1; + + fb_phys = pci_resource_end(pdev, 0) - screen_fb_size + 1; + } - fb_phys = pci_resource_end(pdev, 0) - screen_fb_size + 1; if (!request_mem_region(fb_phys, screen_fb_size, KBUILD_MODNAME)) goto err1; @@ -662,14 +674,22 @@ static int hvfb_getmem(struct fb_info *info) if (!info->apertures) goto err3; - info->apertures->ranges[0].base = pci_resource_start(pdev, 0); - info->apertures->ranges[0].size = pci_resource_len(pdev, 0); + if (gen2vm) { + info->apertures->ranges[0].base = screen_info.lfb_base; + info->apertures->ranges[0].size = screen_info.lfb_size; + } else { + info->apertures->ranges[0].base = pci_resource_start(pdev, 0); + info->apertures->ranges[0].size = pci_resource_len(pdev, 0); + } + info->fix.smem_start = fb_phys; info->fix.smem_len = screen_fb_size; info->screen_base = fb_virt; info->screen_size = screen_fb_size; - pci_dev_put(pdev); + if (!gen2vm) + pci_dev_put(pdev); + return 0; err3: @@ -677,7 +697,9 @@ err3: err2: release_mem_region(fb_phys, screen_fb_size); err1: - pci_dev_put(pdev); + if (!gen2vm) + pci_dev_put(pdev); + return -ENOMEM; }