From patchwork Mon Jul 27 20:51:09 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Dadap X-Patchwork-Id: 11687795 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D613F13B1 for ; Mon, 27 Jul 2020 23:33:25 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id B35E320809 for ; Mon, 27 Jul 2020 23:33:25 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=nvidia.com header.i=@nvidia.com header.b="g8m+r6yY" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B35E320809 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=nvidia.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 1ED6A6E0FA; Mon, 27 Jul 2020 23:32:46 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from hqnvemgate25.nvidia.com (hqnvemgate25.nvidia.com [216.228.121.64]) by gabe.freedesktop.org (Postfix) with ESMTPS id A7CCE89E9B; Mon, 27 Jul 2020 20:50:29 +0000 (UTC) Received: from hqpgpgate101.nvidia.com (Not Verified[216.228.121.13]) by hqnvemgate25.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Mon, 27 Jul 2020 13:49:45 -0700 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate101.nvidia.com (PGP Universal service); Mon, 27 Jul 2020 13:50:29 -0700 X-PGP-Universal: processed; by hqpgpgate101.nvidia.com on Mon, 27 Jul 2020 13:50:29 -0700 Received: from lenny.nvidia.com (10.124.1.5) by HQMAIL107.nvidia.com (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Mon, 27 Jul 2020 20:50:27 +0000 From: Daniel Dadap To: , , , , , Subject: [PATCH 3/6] vga-switcheroo: notify clients of pending/completed switch events Date: Mon, 27 Jul 2020 15:51:09 -0500 Message-ID: <20200727205112.27698-4-ddadap@nvidia.com> X-Mailer: git-send-email 2.18.4 In-Reply-To: <20200727205112.27698-1-ddadap@nvidia.com> References: <20200727205112.27698-1-ddadap@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 X-Originating-IP: [10.124.1.5] X-ClientProxiedBy: HQMAIL111.nvidia.com (172.20.187.18) To HQMAIL107.nvidia.com (172.20.187.13) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1595882985; bh=ZRPljo5KYD8GIXijaOxzLgDlZ6v0DgNHM3aEhp9RDyk=; h=X-PGP-Universal:From:To:CC:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:X-NVConfidentiality:MIME-Version: X-Originating-IP:X-ClientProxiedBy:Content-Type; b=g8m+r6yYuMlQ/dbluXcm2xneAORRa4LsAvxIKE+ISfWqAkPU/7BeucW9oSI5pFDws AUeMc94cSEiiR7q7m+2UsXY46wsayP1veszeL6sQ2y3kEZm2j1jLikHar6EqMr91vA Z6O7caQNC9kLbhkpqZHAAwQJeMai4q8yaqC7Jeynbh8RNH2pA1aLnVq0SohmDMsHIU 8ZukjJgLUXvUnxRFACH0Sy5BxfkEUkcxBbxohpXpkZF4Axvx79MdK6viIwAQMqznFz f5gCTZ2+q3WMhIuxazhprfBMxiWuzimF3bod/305LjHl5jO3p/+jXz48RwBFvRv2c9 f2JaGSLCt8TAg== X-Mailman-Approved-At: Mon, 27 Jul 2020 23:32:42 +0000 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: Daniel Dadap Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Add a new vga-switcheroo client callback to allow clients to register for receiving notifications when a mux switch is pending, completed, or failed. This allows individual client drivers to prepare for or respond to mux switches to and from the registered client device. Signed-off-by: Daniel Dadap --- drivers/gpu/vga/vga_switcheroo.c | 29 ++++++++++++++++++++++++++++- include/linux/vga_switcheroo.h | 18 ++++++++++++++++++ 2 files changed, 46 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/vga/vga_switcheroo.c b/drivers/gpu/vga/vga_switcheroo.c index a4fc78c4bf4f..6392dc92696b 100644 --- a/drivers/gpu/vga/vga_switcheroo.c +++ b/drivers/gpu/vga/vga_switcheroo.c @@ -756,14 +756,41 @@ static int vga_switchto_stage2(struct vga_switcheroo_client *new_client, if (new_client->fb_info) fbcon_remap_all(new_client->fb_info); + if (active->ops->notify) + active->ops->notify(active->pdev, + VGA_SWITCHEROO_NOTIFY_SWITCH_AWAY, + VGA_SWITCHEROO_NOTIFY_SWITCH_PENDING); + if (new_client->ops->notify) + new_client->ops->notify(new_client->pdev, + VGA_SWITCHEROO_NOTIFY_SWITCH_TO, + VGA_SWITCHEROO_NOTIFY_SWITCH_PENDING); + active->switched = false; mutex_lock(&vgasr_priv.mux_hw_lock); ret = vgasr_priv.handler->switchto(new_client->id); mutex_unlock(&vgasr_priv.mux_hw_lock); - if (ret) + if (ret) { + if (active->ops->notify) + active->ops->notify(active->pdev, + VGA_SWITCHEROO_NOTIFY_SWITCH_AWAY, + VGA_SWITCHEROO_NOTIFY_SWITCH_FAILED); + if (new_client->ops->notify) + new_client->ops->notify(new_client->pdev, + VGA_SWITCHEROO_NOTIFY_SWITCH_TO, + VGA_SWITCHEROO_NOTIFY_SWITCH_FAILED); return ret; + } new_client->switched = true; + if (active->ops->notify) + active->ops->notify(active->pdev, + VGA_SWITCHEROO_NOTIFY_SWITCH_AWAY, + VGA_SWITCHEROO_NOTIFY_SWITCH_COMPLETE); + if (new_client->ops->notify) + new_client->ops->notify(new_client->pdev, + VGA_SWITCHEROO_NOTIFY_SWITCH_TO, + VGA_SWITCHEROO_NOTIFY_SWITCH_COMPLETE); + if (new_client->ops->reprobe) new_client->ops->reprobe(new_client->pdev); diff --git a/include/linux/vga_switcheroo.h b/include/linux/vga_switcheroo.h index 63e6d6e5786e..2dc8ebc84fd4 100644 --- a/include/linux/vga_switcheroo.h +++ b/include/linux/vga_switcheroo.h @@ -90,6 +90,17 @@ enum vga_switcheroo_client_id { VGA_SWITCHEROO_MAX_CLIENTS, }; +enum vga_switcheroo_notify_direction { + VGA_SWITCHEROO_NOTIFY_SWITCH_TO, + VGA_SWITCHEROO_NOTIFY_SWITCH_AWAY, +}; + +enum vga_switcheroo_notify_action { + VGA_SWITCHEROO_NOTIFY_SWITCH_PENDING, + VGA_SWITCHEROO_NOTIFY_SWITCH_COMPLETE, + VGA_SWITCHEROO_NOTIFY_SWITCH_FAILED, +}; + /** * struct vga_switcheroo_handler - handler callbacks * @init: initialize handler. @@ -134,6 +145,10 @@ struct vga_switcheroo_handler { * Mandatory. The client should return false if a user space process * has one of its device files open * @gpu_bound: notify the client id to audio client when the GPU is bound. + * @notify: notify clients of pending and completed switches + * Optional. This gets called for both active and inactive clients, + * before a switch begins, and after a switch successfully completes + * or fails. * * Client callbacks. A client can be either a GPU or an audio device on a GPU. * The @set_gpu_state and @can_switch methods are mandatory, @reprobe may be @@ -145,6 +160,9 @@ struct vga_switcheroo_client_ops { void (*reprobe)(struct pci_dev *dev); bool (*can_switch)(struct pci_dev *dev); void (*gpu_bound)(struct pci_dev *dev, enum vga_switcheroo_client_id); + void (*notify)(struct pci_dev *dev, + enum vga_switcheroo_notify_direction, + enum vga_switcheroo_notify_action); }; #if defined(CONFIG_VGA_SWITCHEROO)