From patchwork Fri Oct 11 09:14:28 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chris Wilson X-Patchwork-Id: 3021681 Return-Path: X-Original-To: patchwork-intel-gfx@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 75F8F9F245 for ; Fri, 11 Oct 2013 09:17:09 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 9E958202BE for ; Fri, 11 Oct 2013 09:17:04 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id 09D82201A4 for ; Fri, 11 Oct 2013 09:17:03 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 14F114371D for ; Fri, 11 Oct 2013 02:17:02 -0700 (PDT) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from fireflyinternet.com (server109-228-6-235.live-servers.net [109.228.6.235]) by gabe.freedesktop.org (Postfix) with ESMTP id 1D7D8E7E69 for ; Fri, 11 Oct 2013 02:14:33 -0700 (PDT) X-Default-Received-SPF: pass (skip=forwardok (res=PASS)) x-ip-name=78.156.73.22; Received: from nuc-i3427.intel.com (unverified [78.156.73.22]) by fireflyinternet.com (Firefly Internet (M1)) with ESMTP id 130168750-1500050 for multiple; Fri, 11 Oct 2013 10:14:30 +0100 From: Chris Wilson To: intel-gfx@lists.freedesktop.org Date: Fri, 11 Oct 2013 10:14:28 +0100 Message-Id: <1381482868-13602-1-git-send-email-chris@chris-wilson.co.uk> X-Mailer: git-send-email 1.7.9.5 X-Originating-IP: 78.156.73.22 Subject: [Intel-gfx] [PATCH] drm/i915: Disable all GEM timers and work on unload X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: intel-gfx-bounces+patchwork-intel-gfx=patchwork.kernel.org@lists.freedesktop.org Errors-To: intel-gfx-bounces+patchwork-intel-gfx=patchwork.kernel.org@lists.freedesktop.org X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD,UNPARSEABLE_RELAY autolearn=ham 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 We have two once very similar functions, i915_gpu_idle() and i915_gem_idle(). The former is used as the lower level operation to flush work on the GPU, whereas the latter is the high level interface to flush the GEM bookkeeping in addition to flushing the GPU. As such i915_gem_idle() also clears out the request and activity lists and cancels the delayed work. This is what we need for unloading the driver, unfortunately we called i915_gpu_idle() instead. In the process, make sure that when cancelling the delayed work and timer, which is synchronous, that we do not hold any locks to prevent a deadlock if the work item is already waiting upon the mutex. This requires us to push the mutex down from the caller to i915_gem_idle(). Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=70334 Signed-off-by: Chris Wilson --- drivers/gpu/drm/i915/i915_dma.c | 8 +------ drivers/gpu/drm/i915/i915_drv.c | 4 +--- drivers/gpu/drm/i915/i915_drv.h | 2 +- drivers/gpu/drm/i915/i915_gem.c | 44 +++++++++++++++++---------------------- 4 files changed, 22 insertions(+), 36 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c index 5e35f29..c274f98 100644 --- a/drivers/gpu/drm/i915/i915_dma.c +++ b/drivers/gpu/drm/i915/i915_dma.c @@ -1699,15 +1699,9 @@ int i915_driver_unload(struct drm_device *dev) if (dev_priv->mm.inactive_shrinker.scan_objects) unregister_shrinker(&dev_priv->mm.inactive_shrinker); - mutex_lock(&dev->struct_mutex); - ret = i915_gpu_idle(dev); + ret = i915_gem_idle(dev, true); if (ret) DRM_ERROR("failed to idle hardware: %d\n", ret); - i915_gem_retire_requests(dev); - mutex_unlock(&dev->struct_mutex); - - /* Cancel the retire work handler, which should be idle now. */ - cancel_delayed_work_sync(&dev_priv->mm.retire_work); io_mapping_free(dev_priv->gtt.mappable); arch_phys_wc_del(dev_priv->gtt.mtrr); diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index 59649c0..7cab535 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -479,9 +479,7 @@ static int i915_drm_freeze(struct drm_device *dev) if (drm_core_check_feature(dev, DRIVER_MODESET)) { int error; - mutex_lock(&dev->struct_mutex); - error = i915_gem_idle(dev); - mutex_unlock(&dev->struct_mutex); + error = i915_gem_idle(dev, false); if (error) { dev_err(&dev->pdev->dev, "GEM idle failed, resume might fail\n"); diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index e0152e7..10e1236 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -2039,7 +2039,7 @@ int i915_gem_l3_remap(struct intel_ring_buffer *ring, int slice); void i915_gem_init_swizzling(struct drm_device *dev); void i915_gem_cleanup_ringbuffer(struct drm_device *dev); int __must_check i915_gpu_idle(struct drm_device *dev); -int __must_check i915_gem_idle(struct drm_device *dev); +int __must_check i915_gem_idle(struct drm_device *dev, bool disable); int __i915_add_request(struct intel_ring_buffer *ring, struct drm_file *file, struct drm_i915_gem_object *batch_obj, diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 63dbd3c..0d6c95b 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -4401,17 +4401,18 @@ void i915_gem_vma_destroy(struct i915_vma *vma) } int -i915_gem_idle(struct drm_device *dev) +i915_gem_idle(struct drm_device *dev, bool disable) { drm_i915_private_t *dev_priv = dev->dev_private; - int ret; + int ret = 0; + mutex_lock(&dev->struct_mutex); if (dev_priv->ums.mm_suspended) - return 0; + goto err; ret = i915_gpu_idle(dev); if (ret) - return ret; + goto err; i915_gem_retire_requests(dev); @@ -4419,16 +4420,25 @@ i915_gem_idle(struct drm_device *dev) if (!drm_core_check_feature(dev, DRIVER_MODESET)) i915_gem_evict_everything(dev); - del_timer_sync(&dev_priv->gpu_error.hangcheck_timer); - i915_kernel_lost_context(dev); i915_gem_cleanup_ringbuffer(dev); - /* Cancel the retire work handler, which should be idle now. */ + /* Hack! Don't let anybody do execbuf while we don't control the chip. + * We need to replace this with a semaphore, or something. + * And not confound ums.mm_suspended! + */ + dev_priv->ums.mm_suspended = disable; + mutex_unlock(&dev->struct_mutex); + + del_timer_sync(&dev_priv->gpu_error.hangcheck_timer); cancel_delayed_work_sync(&dev_priv->mm.retire_work); cancel_delayed_work_sync(&dev_priv->mm.idle_work); return 0; + +err: + mutex_unlock(&dev->struct_mutex); + return ret; } int i915_gem_l3_remap(struct intel_ring_buffer *ring, int slice) @@ -4681,26 +4691,12 @@ int i915_gem_leavevt_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { - struct drm_i915_private *dev_priv = dev->dev_private; - int ret; - if (drm_core_check_feature(dev, DRIVER_MODESET)) return 0; drm_irq_uninstall(dev); - mutex_lock(&dev->struct_mutex); - ret = i915_gem_idle(dev); - - /* Hack! Don't let anybody do execbuf while we don't control the chip. - * We need to replace this with a semaphore, or something. - * And not confound ums.mm_suspended! - */ - if (ret != 0) - dev_priv->ums.mm_suspended = 1; - mutex_unlock(&dev->struct_mutex); - - return ret; + return i915_gem_idle(dev, true); } void @@ -4711,11 +4707,9 @@ i915_gem_lastclose(struct drm_device *dev) if (drm_core_check_feature(dev, DRIVER_MODESET)) return; - mutex_lock(&dev->struct_mutex); - ret = i915_gem_idle(dev); + ret = i915_gem_idle(dev, false); if (ret) DRM_ERROR("failed to idle hardware: %d\n", ret); - mutex_unlock(&dev->struct_mutex); } static void