From patchwork Fri Dec 7 02:41:44 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeykumar Sankaran X-Patchwork-Id: 10717363 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D3D641731 for ; Fri, 7 Dec 2018 02:42:16 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C50592EC27 for ; Fri, 7 Dec 2018 02:42:16 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B8A642EC37; Fri, 7 Dec 2018 02:42:16 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 61CA32ECF5 for ; Fri, 7 Dec 2018 02:42:12 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id AD8D36E6BD; Fri, 7 Dec 2018 02:42:08 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from smtp.codeaurora.org (smtp.codeaurora.org [198.145.29.96]) by gabe.freedesktop.org (Postfix) with ESMTPS id F0E536E6B7; Fri, 7 Dec 2018 02:42:04 +0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1000) id D36AC60C65; Fri, 7 Dec 2018 02:42:04 +0000 (UTC) Received: from jeykumar-linux.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: jsanka@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 9D41660AD8; Fri, 7 Dec 2018 02:41:52 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 9D41660AD8 From: Jeykumar Sankaran To: dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, linux-arm-msm@vger.kernel.org Subject: [PATCH v4 5/5] drm/msm: subclass work object for vblank events Date: Thu, 6 Dec 2018 18:41:44 -0800 Message-Id: <1544150504-19630-5-git-send-email-jsanka@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1544150504-19630-1-git-send-email-jsanka@codeaurora.org> References: <1544150504-19630-1-git-send-email-jsanka@codeaurora.org> X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: hoegsberg@google.com, seanpaul@chromium.org MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP msm maintains a separate structure to define vblank work definitions and a list to track events submitted to the workqueue. We can avoid this redundant list and its protection mechanism, if we subclass the work object to encapsulate vblank event parameters. changes in v2: - subclass optimization on system wq (Sean Paul) changes in v3: - none changes in v4: - move flush_workqueue before irq uninstall Signed-off-by: Jeykumar Sankaran --- drivers/gpu/drm/msm/msm_drv.c | 71 ++++++++++++++----------------------------- drivers/gpu/drm/msm/msm_drv.h | 7 ----- 2 files changed, 22 insertions(+), 56 deletions(-) diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c index 1e9fec1..5f61fc4 100644 --- a/drivers/gpu/drm/msm/msm_drv.c +++ b/drivers/gpu/drm/msm/msm_drv.c @@ -206,61 +206,44 @@ u32 msm_readl(const void __iomem *addr) return val; } -struct vblank_event { - struct list_head node; +struct msm_vblank_work { + struct work_struct work; int crtc_id; bool enable; + struct msm_drm_private *priv; }; static void vblank_ctrl_worker(struct work_struct *work) { - struct msm_vblank_ctrl *vbl_ctrl = container_of(work, - struct msm_vblank_ctrl, work); - struct msm_drm_private *priv = container_of(vbl_ctrl, - struct msm_drm_private, vblank_ctrl); + struct msm_vblank_work *vbl_work = container_of(work, + struct msm_vblank_work, work); + struct msm_drm_private *priv = vbl_work->priv; struct msm_kms *kms = priv->kms; - struct vblank_event *vbl_ev, *tmp; - unsigned long flags; - - spin_lock_irqsave(&vbl_ctrl->lock, flags); - list_for_each_entry_safe(vbl_ev, tmp, &vbl_ctrl->event_list, node) { - list_del(&vbl_ev->node); - spin_unlock_irqrestore(&vbl_ctrl->lock, flags); - - if (vbl_ev->enable) - kms->funcs->enable_vblank(kms, - priv->crtcs[vbl_ev->crtc_id]); - else - kms->funcs->disable_vblank(kms, - priv->crtcs[vbl_ev->crtc_id]); - - kfree(vbl_ev); - spin_lock_irqsave(&vbl_ctrl->lock, flags); - } + if (vbl_work->enable) + kms->funcs->enable_vblank(kms, priv->crtcs[vbl_work->crtc_id]); + else + kms->funcs->disable_vblank(kms, priv->crtcs[vbl_work->crtc_id]); - spin_unlock_irqrestore(&vbl_ctrl->lock, flags); + kfree(vbl_work); } static int vblank_ctrl_queue_work(struct msm_drm_private *priv, int crtc_id, bool enable) { - struct msm_vblank_ctrl *vbl_ctrl = &priv->vblank_ctrl; - struct vblank_event *vbl_ev; - unsigned long flags; + struct msm_vblank_work *vbl_work; - vbl_ev = kzalloc(sizeof(*vbl_ev), GFP_ATOMIC); - if (!vbl_ev) + vbl_work = kzalloc(sizeof(*vbl_work), GFP_ATOMIC); + if (!vbl_work) return -ENOMEM; - vbl_ev->crtc_id = crtc_id; - vbl_ev->enable = enable; + INIT_WORK(&vbl_work->work, vblank_ctrl_worker); - spin_lock_irqsave(&vbl_ctrl->lock, flags); - list_add_tail(&vbl_ev->node, &vbl_ctrl->event_list); - spin_unlock_irqrestore(&vbl_ctrl->lock, flags); + vbl_work->crtc_id = crtc_id; + vbl_work->enable = enable; + vbl_work->priv = priv; - queue_work(priv->wq, &vbl_ctrl->work); + queue_work(priv->wq, &vbl_work->work); return 0; } @@ -272,19 +255,15 @@ static int msm_drm_uninit(struct device *dev) struct msm_drm_private *priv = ddev->dev_private; struct msm_kms *kms = priv->kms; struct msm_mdss *mdss = priv->mdss; - struct msm_vblank_ctrl *vbl_ctrl = &priv->vblank_ctrl; - struct vblank_event *vbl_ev, *tmp; int i; /* We must cancel and cleanup any pending vblank enable/disable * work before drm_irq_uninstall() to avoid work re-enabling an * irq after uninstall has disabled it. */ - flush_work(&vbl_ctrl->work); - list_for_each_entry_safe(vbl_ev, tmp, &vbl_ctrl->event_list, node) { - list_del(&vbl_ev->node); - kfree(vbl_ev); - } + + flush_workqueue(priv->wq); + destroy_workqueue(priv->wq); /* clean up event worker threads */ for (i = 0; i < priv->num_crtcs; i++) { @@ -313,9 +292,6 @@ static int msm_drm_uninit(struct device *dev) drm_irq_uninstall(ddev); pm_runtime_put_sync(dev); - flush_workqueue(priv->wq); - destroy_workqueue(priv->wq); - if (kms && kms->funcs) kms->funcs->destroy(kms); @@ -472,9 +448,6 @@ static int msm_drm_init(struct device *dev, struct drm_driver *drv) priv->wq = alloc_ordered_workqueue("msm", 0); INIT_LIST_HEAD(&priv->inactive_list); - INIT_LIST_HEAD(&priv->vblank_ctrl.event_list); - INIT_WORK(&priv->vblank_ctrl.work, vblank_ctrl_worker); - spin_lock_init(&priv->vblank_ctrl.lock); drm_mode_config_init(ddev); diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h index 0307543..f2373e9 100644 --- a/drivers/gpu/drm/msm/msm_drv.h +++ b/drivers/gpu/drm/msm/msm_drv.h @@ -77,12 +77,6 @@ enum msm_mdp_plane_property { PLANE_PROP_MAX_NUM }; -struct msm_vblank_ctrl { - struct work_struct work; - struct list_head event_list; - spinlock_t lock; -}; - #define MSM_GPU_MAX_RINGS 4 #define MAX_H_TILES_PER_DISPLAY 2 @@ -225,7 +219,6 @@ struct msm_drm_private { struct notifier_block vmap_notifier; struct shrinker shrinker; - struct msm_vblank_ctrl vblank_ctrl; struct drm_atomic_state *pm_state; };