From patchwork Thu Aug 1 00:00:08 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ben Widawsky X-Patchwork-Id: 2836644 Return-Path: X-Original-To: patchwork-intel-gfx@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 4D313C0319 for ; Thu, 1 Aug 2013 00:14:52 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 7AB5C2014B for ; Thu, 1 Aug 2013 00:14:51 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id 6DF8120126 for ; Thu, 1 Aug 2013 00:14:50 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 6D00EE7B44 for ; Wed, 31 Jul 2013 17:14:49 -0700 (PDT) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mail.bwidawsk.net (bwidawsk.net [166.78.191.112]) by gabe.freedesktop.org (Postfix) with ESMTP id BF6AAE6308 for ; Wed, 31 Jul 2013 17:00:44 -0700 (PDT) Received: by mail.bwidawsk.net (Postfix, from userid 5001) id 66D1A5963E; Wed, 31 Jul 2013 17:00:44 -0700 (PDT) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-5.7 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from lundgren.kumite (c-24-21-100-90.hsd1.or.comcast.net [24.21.100.90]) by mail.bwidawsk.net (Postfix) with ESMTPSA id 4E94D5963A; Wed, 31 Jul 2013 17:00:36 -0700 (PDT) From: Ben Widawsky To: Intel GFX Date: Wed, 31 Jul 2013 17:00:08 -0700 Message-Id: <1375315222-4785-16-git-send-email-ben@bwidawsk.net> X-Mailer: git-send-email 1.8.3.4 In-Reply-To: <1375315222-4785-1-git-send-email-ben@bwidawsk.net> References: <1375315222-4785-1-git-send-email-ben@bwidawsk.net> Cc: Ben Widawsky Subject: [Intel-gfx] [PATCH 15/29] drm/i915: Improve VMA comments 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-Virus-Scanned: ClamAV using ClamSMTP Signed-off-by: Ben Widawsky --- drivers/gpu/drm/i915/i915_drv.h | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 2579e96..dbfffb2 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -533,7 +533,12 @@ struct i915_hw_ppgtt { int (*enable)(struct drm_device *dev); }; -/* To make things as simple as possible (ie. no refcounting), a VMA's lifetime +/** + * A VMA represents a GEM BO that is bound into an address space. Therefore, a + * VMA's presence cannot be guaranteed before binding, or after unbinding the + * object into/from the address space. + * + * To make things as simple as possible (ie. no refcounting), a VMA's lifetime * will always be <= an objects lifetime. So object refcounting should cover us. */ struct i915_vma {