From patchwork Wed Feb 6 11:10:22 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chris Wilson X-Patchwork-Id: 2103591 Return-Path: X-Original-To: patchwork-intel-gfx@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by patchwork2.kernel.org (Postfix) with ESMTP id B111FDF2A1 for ; Wed, 6 Feb 2013 11:12:04 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 998DCE5DEB for ; Wed, 6 Feb 2013 03:12:04 -0800 (PST) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from fireflyinternet.com (smtp.fireflyinternet.com [109.228.6.236]) by gabe.freedesktop.org (Postfix) with ESMTP id C9509E5CB8 for ; Wed, 6 Feb 2013 03:11:27 -0800 (PST) X-Default-Received-SPF: pass (skip=forwardok (res=PASS)) x-ip-name=78.156.73.22; Received: from arrandale.alporthouse.com (unverified [78.156.73.22]) by fireflyinternet.com (Firefly Internet (M1)) with ESMTP id 128713251-1500050 for multiple; Wed, 06 Feb 2013 11:11:19 +0000 From: Chris Wilson To: intel-gfx@lists.freedesktop.org Date: Wed, 6 Feb 2013 11:10:22 +0000 Message-Id: <1360149028-13531-2-git-send-email-chris@chris-wilson.co.uk> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1360149028-13531-1-git-send-email-chris@chris-wilson.co.uk> References: <1360149028-13531-1-git-send-email-chris@chris-wilson.co.uk> X-Originating-IP: 78.156.73.22 Subject: [Intel-gfx] [PATCH 2/8] drm/i915: Introduce i915_gem_object_create_stolen_for_preallocated 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 Wrap a preallocated region of stolen memory within an ordinary GEM object, for example the BIOS framebuffer. Signed-off-by: Chris Wilson --- drivers/gpu/drm/i915/i915_drv.h | 5 +++ drivers/gpu/drm/i915/i915_gem_stolen.c | 65 ++++++++++++++++++++++++++++++++ 2 files changed, 70 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 08c5def..fd8a495 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -1720,6 +1720,11 @@ void i915_gem_stolen_cleanup_compression(struct drm_device *dev); void i915_gem_cleanup_stolen(struct drm_device *dev); struct drm_i915_gem_object * i915_gem_object_create_stolen(struct drm_device *dev, u32 size); +struct drm_i915_gem_object * +i915_gem_object_create_stolen_for_preallocated(struct drm_device *dev, + u32 stolen_offset, + u32 gtt_offset, + u32 size); void i915_gem_object_release_stolen(struct drm_i915_gem_object *obj); /* i915_gem_tiling.c */ diff --git a/drivers/gpu/drm/i915/i915_gem_stolen.c b/drivers/gpu/drm/i915/i915_gem_stolen.c index 69d97cb..130d1db 100644 --- a/drivers/gpu/drm/i915/i915_gem_stolen.c +++ b/drivers/gpu/drm/i915/i915_gem_stolen.c @@ -312,6 +312,71 @@ i915_gem_object_create_stolen(struct drm_device *dev, u32 size) return NULL; } +struct drm_i915_gem_object * +i915_gem_object_create_stolen_for_preallocated(struct drm_device *dev, + u32 stolen_offset, + u32 gtt_offset, + u32 size) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + struct drm_i915_gem_object *obj; + struct drm_mm_node *stolen; + + if (dev_priv->mm.stolen_base == 0) + return NULL; + + DRM_DEBUG_KMS("creating preallocated stolen object: stolen_offset=%x, gtt_offset=%x, size=%x\n", + stolen_offset, gtt_offset, size); + + /* KISS and expect everything to be page-aligned */ + BUG_ON(stolen_offset & 4095); + BUG_ON(gtt_offset & 4095); + BUG_ON(size & 4095); + + if (WARN_ON(size == 0)) + return NULL; + + stolen = drm_mm_create_block(&dev_priv->mm.stolen, + stolen_offset, size, + false); + if (stolen == NULL) { + DRM_DEBUG_KMS("failed to allocate stolen space\n"); + return NULL; + } + + obj = _i915_gem_object_create_stolen(dev, stolen); + if (obj == NULL) { + DRM_DEBUG_KMS("failed to allocate stolen object\n"); + drm_mm_put_block(stolen); + return NULL; + } + + /* To simplify the initialisation sequence between KMS and GTT, + * we allow construction of the stolen object prior to + * setting up the GTT space. The actual reservation will occur + * later. + */ + if (drm_mm_initialized(&dev_priv->mm.gtt_space)) { + obj->gtt_space = drm_mm_create_block(&dev_priv->mm.gtt_space, + gtt_offset, size, + false); + if (obj->gtt_space == NULL) { + DRM_DEBUG_KMS("failed to allocate stolen GTT space\n"); + drm_gem_object_unreference(&obj->base); + return NULL; + } + } else + obj->gtt_space = I915_GTT_RESERVED; + + obj->gtt_offset = gtt_offset; + obj->has_global_gtt_mapping = 1; + + list_add_tail(&obj->gtt_list, &dev_priv->mm.bound_list); + list_add_tail(&obj->mm_list, &dev_priv->mm.inactive_list); + + return obj; +} + void i915_gem_object_release_stolen(struct drm_i915_gem_object *obj) {