From patchwork Tue Jun 5 09:41:07 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chris Wilson X-Patchwork-Id: 10447959 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id C09BA60467 for ; Tue, 5 Jun 2018 09:41:21 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B29F028E68 for ; Tue, 5 Jun 2018 09:41:21 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A6CE028E7D; Tue, 5 Jun 2018 09:41:21 +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 54F5E28E68 for ; Tue, 5 Jun 2018 09:41:21 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id AD4B589DB7; Tue, 5 Jun 2018 09:41:20 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from fireflyinternet.com (mail.fireflyinternet.com [109.228.58.192]) by gabe.freedesktop.org (Postfix) with ESMTPS id D602389C84 for ; Tue, 5 Jun 2018 09:41:18 +0000 (UTC) X-Default-Received-SPF: pass (skip=forwardok (res=PASS)) x-ip-name=78.156.65.138; Received: from haswell.alporthouse.com (unverified [78.156.65.138]) by fireflyinternet.com (Firefly Internet (M1)) with ESMTP id 11944209-1500050 for multiple; Tue, 05 Jun 2018 10:41:07 +0100 Received: by haswell.alporthouse.com (sSMTP sendmail emulation); Tue, 05 Jun 2018 10:41:08 +0100 From: Chris Wilson To: intel-gfx@lists.freedesktop.org Date: Tue, 5 Jun 2018 10:41:07 +0100 Message-Id: <20180605094107.31367-1-chris@chris-wilson.co.uk> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180605093420.30594-1-chris@chris-wilson.co.uk> References: <20180605093420.30594-1-chris@chris-wilson.co.uk> X-Originating-IP: 78.156.65.138 X-Country: code=GB country="United Kingdom" ip=78.156.65.138 Subject: [Intel-gfx] [PATCH v2] drm/i915/vma: Move the bind_count vs pin_count assertion to a helper X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP To spare ourselves a long line later, refactor the repeated check of bind_count vs pin_count to a helper. v2: Fix up the commentary! Suggested-by: Joonas Lahtinen Signed-off-by: Chris Wilson Cc: Joonas Lahtinen Cc: Mika Kuoppala Cc: Matthew Auld Reviewed-by: Mika Kuoppala --- drivers/gpu/drm/i915/i915_vma.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c index 9324d476e0a7..10bf654cd023 100644 --- a/drivers/gpu/drm/i915/i915_vma.c +++ b/drivers/gpu/drm/i915/i915_vma.c @@ -459,6 +459,18 @@ bool i915_gem_valid_gtt_space(struct i915_vma *vma, unsigned long cache_level) return true; } +static void assert_bind_count(const struct drm_i915_gem_object *obj) +{ + /* + * Combine the assertion that the object is bound and that we have + * pinned its pages. But we should never have bound the object + * more than we have pinned its pages. (For complete accuracy, we + * assume that no else is pinning the pages, but as a rough assertion + * that we will not run into problems later, this will do!) + */ + GEM_BUG_ON(atomic_read(&obj->mm.pages_pin_count) < obj->bind_count); +} + /** * i915_vma_insert - finds a slot for the vma in its address space * @vma: the vma @@ -595,7 +607,7 @@ i915_vma_insert(struct i915_vma *vma, u64 size, u64 alignment, u64 flags) obj->bind_count++; spin_unlock(&dev_priv->mm.obj_lock); - GEM_BUG_ON(atomic_read(&obj->mm.pages_pin_count) < obj->bind_count); + assert_bind_count(obj); return 0; @@ -633,7 +645,7 @@ i915_vma_remove(struct i915_vma *vma) * reaped by the shrinker. */ i915_gem_object_unpin_pages(obj); - GEM_BUG_ON(atomic_read(&obj->mm.pages_pin_count) < obj->bind_count); + assert_bind_count(obj); } int __i915_vma_do_pin(struct i915_vma *vma,