From patchwork Fri Jan 15 22:54:22 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Vetter X-Patchwork-Id: 73243 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by demeter.kernel.org (8.14.3/8.14.2) with ESMTP id o0FMs24U009592 for ; Fri, 15 Jan 2010 22:54:02 GMT Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0E63B9F734; Fri, 15 Jan 2010 14:54:02 -0800 (PST) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mail.ffwll.ch (cable-static-49-187.intergga.ch [157.161.49.187]) by gabe.freedesktop.org (Postfix) with ESMTP id 717289F748 for ; Fri, 15 Jan 2010 14:53:59 -0800 (PST) Received: by mail.ffwll.ch (Postfix, from userid 1000) id 5A1E120C247; Fri, 15 Jan 2010 23:53:58 +0100 (CET) X-Spam-ASN: X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on orange.ffwll.ch X-Spam-Level: X-Spam-Hammy: 0.000-+--struct, 0.000-+--signed-off-by, 0.000-+--signedoffby X-Spam-Status: No, score=-1.2 required=6.0 tests=ALL_TRUSTED,BAYES_00, FH_DATE_PAST_20XX autolearn=no version=3.2.5 X-Spam-Spammy: 0.998-1--one!, 0.998-1--one, 0.967-+--H*m:ffwll Received: from biene (unknown [192.168.23.129]) by mail.ffwll.ch (Postfix) with ESMTP id AAAD720C245; Fri, 15 Jan 2010 23:53:53 +0100 (CET) Received: from daniel by biene with local (Exim 4.71) (envelope-from ) id 1NVv3f-0001Y0-NI; Fri, 15 Jan 2010 23:54:25 +0100 From: Daniel Vetter To: intel-gfx@lists.freedesktop.org Date: Fri, 15 Jan 2010 23:54:22 +0100 Message-Id: X-Mailer: git-send-email 1.6.6 In-Reply-To: <20100115215520.GL3565@viiv.ffwll.ch> References: <20100115215520.GL3565@viiv.ffwll.ch> Cc: Daniel Vetter Subject: [Intel-gfx] [PATCH] drm/i915: extract fence stealing code X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.9 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@lists.freedesktop.org Errors-To: intel-gfx-bounces@lists.freedesktop.org diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 7112457..c714a32 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -2373,6 +2373,58 @@ static void i830_write_fence_reg(struct drm_i915_fence_reg *reg) I915_WRITE(FENCE_REG_830_0 + (regnum * 4), val); } +static int i915_find_fence_reg(struct drm_device *dev) +{ + struct drm_i915_fence_reg *reg = NULL; + struct drm_i915_gem_object *obj_priv = NULL; + struct drm_i915_private *dev_priv = dev->dev_private; + struct drm_gem_object *obj = NULL; + int i, avail, ret; + + /* First try to find a free reg */ + avail = 0; + for (i = dev_priv->fence_reg_start; i < dev_priv->num_fence_regs; i++) { + reg = &dev_priv->fence_regs[i]; + if (!reg->obj) + return i; + + obj_priv = reg->obj->driver_private; + if (!obj_priv->pin_count) + avail++; + } + + if (avail == 0) + return -ENOSPC; + + /* None available, try to steal one or wait for a user to finish */ + i = I915_FENCE_REG_NONE; + list_for_each_entry(obj_priv, &dev_priv->mm.fence_list, + fence_list) { + obj = obj_priv->obj; + + if (obj_priv->pin_count) + continue; + + /* found one! */ + i = obj_priv->fence_reg; + break; + } + + BUG_ON(i == I915_FENCE_REG_NONE); + + /* Take a reference, as otherwise the wait_rendering + * below may cause the object to get freed out from + * under us. + */ + drm_gem_object_reference(obj); + ret = i915_gem_object_put_fence_reg(obj); + drm_gem_object_unreference(obj); + if (ret != 0) + return ret; + + return i; +} + /** * i915_gem_object_get_fence_reg - set up a fence reg for an object * @obj: object to map through a fence reg @@ -2393,8 +2445,7 @@ i915_gem_object_get_fence_reg(struct drm_gem_object *obj) struct drm_i915_private *dev_priv = dev->dev_private; struct drm_i915_gem_object *obj_priv = obj->driver_private; struct drm_i915_fence_reg *reg = NULL; - struct drm_i915_gem_object *old_obj_priv = NULL; - int i, ret, avail; + int ret; /* Just update our place in the LRU if our fence is getting used. */ if (obj_priv->fence_reg != I915_FENCE_REG_NONE) { @@ -2422,51 +2473,12 @@ i915_gem_object_get_fence_reg(struct drm_gem_object *obj) break; } - /* First try to find a free reg */ - avail = 0; - for (i = dev_priv->fence_reg_start; i < dev_priv->num_fence_regs; i++) { - reg = &dev_priv->fence_regs[i]; - if (!reg->obj) - break; - - old_obj_priv = reg->obj->driver_private; - if (!old_obj_priv->pin_count) - avail++; - } - - /* None available, try to steal one or wait for a user to finish */ - if (i == dev_priv->num_fence_regs) { - struct drm_gem_object *old_obj = NULL; - - if (avail == 0) - return -ENOSPC; - - list_for_each_entry(old_obj_priv, &dev_priv->mm.fence_list, - fence_list) { - old_obj = old_obj_priv->obj; - - if (old_obj_priv->pin_count) - continue; - - /* Take a reference, as otherwise the wait_rendering - * below may cause the object to get freed out from - * under us. - */ - drm_gem_object_reference(old_obj); - - break; - } - - i = old_obj_priv->fence_reg; - reg = &dev_priv->fence_regs[i]; - - ret = i915_gem_object_put_fence_reg(old_obj); - drm_gem_object_unreference(old_obj); - if (ret != 0) - return ret; - } + ret = i915_find_fence_reg(dev); + if (ret < 0) + return ret; - obj_priv->fence_reg = i; + obj_priv->fence_reg = ret; + reg = &dev_priv->fence_regs[obj_priv->fence_reg]; list_add_tail(&obj_priv->fence_list, &dev_priv->mm.fence_list); reg->obj = obj; @@ -2478,7 +2490,8 @@ i915_gem_object_get_fence_reg(struct drm_gem_object *obj) else i830_write_fence_reg(reg); - trace_i915_gem_object_get_fence(obj, i, obj_priv->tiling_mode); + trace_i915_gem_object_get_fence(obj, obj_priv->fence_reg, + obj_priv->tiling_mode); return 0; }