From patchwork Mon Oct 9 21:18:44 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnd Bergmann X-Patchwork-Id: 13414536 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 204F6CD6137 for ; Mon, 9 Oct 2023 21:20:40 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 8C73410E2F9; Mon, 9 Oct 2023 21:20:39 +0000 (UTC) Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by gabe.freedesktop.org (Postfix) with ESMTPS id 101F410E2F8 for ; Mon, 9 Oct 2023 21:20:37 +0000 (UTC) Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by ams.source.kernel.org (Postfix) with ESMTP id 57ABEB81737; Mon, 9 Oct 2023 21:20:35 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 57782C433A9; Mon, 9 Oct 2023 21:20:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1696886434; bh=IUe9zQKsuCSW8PZPXBcaUGQEXOnvJDkNFrZmACx/Wc8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NmSWIJiIMcyJjUfY5qC1+UVpedpmfmM66fmZu9OPQGX55nM5F1ijugpZATvGMMYLN 4OtJ68KWwnxC5sKEJHnXB0aPfh+L7jtRdvG3Ur9gFXkeieGSWAIA5v1RDLallZ7LaF ECZ4HTzfRXUiKmQKck0yRmHpvNA52NglqFMVnZjDkiAdX+Jc8CuUNLPfTEUBovYWNI KCj8GVKYtCzYKzH0wh/izBEtRrF1Kby4mGFn1lYaWezV/u9j863swaEgD7FOiPVxvg rv5hmStNIP5G+DhKDG1qddwfAUsgPb2O3uS107yfh00B9t616gUllJtrSz0BpX17wX Z9rWHJNyiE9Iw== From: Arnd Bergmann To: Thomas Zimmermann , linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org Subject: [PATCH v3 8/9] hyperv: avoid dependency on screen_info Date: Mon, 9 Oct 2023 23:18:44 +0200 Message-Id: <20231009211845.3136536-9-arnd@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20231009211845.3136536-1-arnd@kernel.org> References: <20231009211845.3136536-1-arnd@kernel.org> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-hyperv@vger.kernel.org, x86@kernel.org, linux-ia64@vger.kernel.org, linux-sh@vger.kernel.org, Catalin Marinas , Dave Hansen , Russell King , Max Filippov , Will Deacon , linux-efi@vger.kernel.org, Guo Ren , linux-csky@vger.kernel.org, sparclinux@vger.kernel.org, linux-hexagon@vger.kernel.org, WANG Xuerui , "K. Y. Srinivasan" , Ard Biesheuvel , Wei Liu , Michael Ellerman , Helge Deller , Huacai Chen , Dexuan Cui , Javier Martinez Canillas , Christophe Leroy , Deepak Rawat , Ingo Molnar , Matt Turner , linux-mips@vger.kernel.org, Arnd Bergmann , Haiyang Zhang , Nicholas Piggin , Borislav Petkov , loongarch@lists.linux.dev, John Paul Adrian Glaubitz , Thomas Gleixner , linux-arm-kernel@lists.infradead.org, Khalid Aziz , Brian Cain , Thomas Bogendoerfer , Greg Kroah-Hartman , linux-kernel@vger.kernel.org, Dinh Nguyen , linux-riscv@lists.infradead.org, Palmer Dabbelt , linux-alpha@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, "David S. Miller" Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Arnd Bergmann The two hyperv framebuffer drivers (hyperv_fb or hyperv_drm_drv) access the global screen_info in order to take over from the sysfb framebuffer, which in turn could be handled by simplefb, simpledrm or efifb. Similarly, the vmbus_drv code marks the original EFI framebuffer as reserved, but this is not required if there is no sysfb. As a preparation for making screen_info itself more local to the sysfb helper code, add a compile-time conditional in all three files that relate to hyperv fb and just skip this code if there is no sysfb that needs to be unregistered. Reviewed-by: Javier Martinez Canillas Acked-by: Helge Deller Signed-off-by: Arnd Bergmann --- drivers/gpu/drm/hyperv/hyperv_drm_drv.c | 7 ++++--- drivers/hv/vmbus_drv.c | 6 ++++-- drivers/video/fbdev/hyperv_fb.c | 8 ++++---- 3 files changed, 12 insertions(+), 9 deletions(-) diff --git a/drivers/gpu/drm/hyperv/hyperv_drm_drv.c b/drivers/gpu/drm/hyperv/hyperv_drm_drv.c index 58b0b46a21e68..d511d17c5bdfc 100644 --- a/drivers/gpu/drm/hyperv/hyperv_drm_drv.c +++ b/drivers/gpu/drm/hyperv/hyperv_drm_drv.c @@ -73,9 +73,10 @@ static int hyperv_setup_vram(struct hyperv_drm_device *hv, struct drm_device *dev = &hv->dev; int ret; - drm_aperture_remove_conflicting_framebuffers(screen_info.lfb_base, - screen_info.lfb_size, - &hyperv_driver); + if (IS_ENABLED(CONFIG_SYSFB)) + drm_aperture_remove_conflicting_framebuffers(screen_info.lfb_base, + screen_info.lfb_size, + &hyperv_driver); hv->fb_size = (unsigned long)hv->mmio_megabytes * 1024 * 1024; diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c index edbb38f6956b9..b33d5abd9beb2 100644 --- a/drivers/hv/vmbus_drv.c +++ b/drivers/hv/vmbus_drv.c @@ -2100,8 +2100,10 @@ static void __maybe_unused vmbus_reserve_fb(void) if (efi_enabled(EFI_BOOT)) { /* Gen2 VM: get FB base from EFI framebuffer */ - start = screen_info.lfb_base; - size = max_t(__u32, screen_info.lfb_size, 0x800000); + if (IS_ENABLED(CONFIG_SYSFB)) { + start = screen_info.lfb_base; + size = max_t(__u32, screen_info.lfb_size, 0x800000); + } } else { /* Gen1 VM: get FB base from PCI */ pdev = pci_get_device(PCI_VENDOR_ID_MICROSOFT, diff --git a/drivers/video/fbdev/hyperv_fb.c b/drivers/video/fbdev/hyperv_fb.c index 2e27c6bd80442..bf59daf862fc7 100644 --- a/drivers/video/fbdev/hyperv_fb.c +++ b/drivers/video/fbdev/hyperv_fb.c @@ -1010,7 +1010,7 @@ static int hvfb_getmem(struct hv_device *hdev, struct fb_info *info) goto getmem_done; } pr_info("Unable to allocate enough contiguous physical memory on Gen 1 VM. Using MMIO instead.\n"); - } else { + } else if (IS_ENABLED(CONFIG_SYSFB)) { base = screen_info.lfb_base; size = screen_info.lfb_size; } @@ -1056,13 +1056,13 @@ static int hvfb_getmem(struct hv_device *hdev, struct fb_info *info) getmem_done: aperture_remove_conflicting_devices(base, size, KBUILD_MODNAME); - if (gen2vm) { + if (!gen2vm) { + pci_dev_put(pdev); + } else if (IS_ENABLED(CONFIG_SYSFB)) { /* framebuffer is reallocated, clear screen_info to avoid misuse from kexec */ screen_info.lfb_size = 0; screen_info.lfb_base = 0; screen_info.orig_video_isVGA = 0; - } else { - pci_dev_put(pdev); } return 0;