From patchwork Thu Apr 30 11:21:27 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joonas Lahtinen X-Patchwork-Id: 6302001 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 [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 467109F373 for ; Thu, 30 Apr 2015 11:21:35 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 50C04201EC for ; Thu, 30 Apr 2015 11:21:34 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id 5C7E620160 for ; Thu, 30 Apr 2015 11:21:33 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id D9A177A0F4; Thu, 30 Apr 2015 04:21:32 -0700 (PDT) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by gabe.freedesktop.org (Postfix) with ESMTP id EA9227A0F4 for ; Thu, 30 Apr 2015 04:21:29 -0700 (PDT) Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga101.jf.intel.com with ESMTP; 30 Apr 2015 04:21:29 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.11,676,1422950400"; d="scan'208";a="687964300" Received: from jlahtine-mobl1.ger.corp.intel.com (HELO [10.252.13.58]) ([10.252.13.58]) by orsmga001.jf.intel.com with ESMTP; 30 Apr 2015 04:21:29 -0700 Message-ID: <1430392887.1189.10.camel@jlahtine-mobl1> From: Joonas Lahtinen To: intel-gfx Date: Thu, 30 Apr 2015 14:21:27 +0300 In-Reply-To: References: Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo X-Mailer: Evolution 3.10.4 (3.10.4-4.fc20) Mime-Version: 1.0 Subject: [Intel-gfx] [PATCH v2 5/5] drm/i915: Use partial view in mmap fault handler X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable 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 Use partial view for huge BOs (bigger than the mappable aperture) in fault handler so that they can be accessed without trying to make room for them by evicting other objects. v2: - Only use partial views in the case where early rejection was previously done. - Account variable type changes from previous reroll. Cc: Chris Wilson Signed-off-by: Joonas Lahtinen Tested-By: Intel Graphics QA PRTS (Patch Regression Test System Contact: shuang.he@intel.com) --- drivers/gpu/drm/i915/i915_gem.c | 69 +++++++++++++++++++++++++++-------------- 1 file changed, 46 insertions(+), 23 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index a020836..2f3fa0b 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -1635,6 +1635,7 @@ int i915_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) struct drm_i915_gem_object *obj = to_intel_bo(vma->vm_private_data); struct drm_device *dev = obj->base.dev; struct drm_i915_private *dev_priv = dev->dev_private; + struct i915_ggtt_view view = i915_ggtt_view_normal; pgoff_t page_offset; unsigned long pfn; int ret = 0; @@ -1667,8 +1668,21 @@ int i915_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) goto unlock; } - /* Now bind it into the GTT if needed */ - ret = i915_gem_obj_ggtt_pin(obj, 0, PIN_MAPPABLE); + /* Use a partial view if the object is bigger than the aperture. */ + if (obj->base.size >= dev_priv->gtt.mappable_end) { + static const unsigned int chunk_size = 256; // 1 MiB + memset(&view, 0, sizeof(view)); + view.type = I915_GGTT_VIEW_PARTIAL; + view.params.partial.offset = rounddown(page_offset, chunk_size); + view.params.partial.size = + min_t(unsigned int, + chunk_size, + (vma->vm_end - vma->vm_start)/PAGE_SIZE - + view.params.partial.offset); + } + + /* Now pin it into the GTT if needed */ + ret = i915_gem_object_ggtt_pin(obj, &view, 0, PIN_MAPPABLE); if (ret) goto unlock; @@ -1681,30 +1695,44 @@ int i915_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) goto unpin; /* Finally, remap it using the new GTT offset */ - pfn = dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj); + pfn = dev_priv->gtt.mappable_base + + i915_gem_obj_ggtt_offset_view(obj, &view); pfn >>= PAGE_SHIFT; - if (!obj->fault_mappable) { - unsigned long size = min_t(unsigned long, - vma->vm_end - vma->vm_start, - obj->base.size); - int i; + if (unlikely(view.type == I915_GGTT_VIEW_PARTIAL)) { + unsigned long base = vma->vm_start + + (view.params.partial.offset << PAGE_SHIFT); + unsigned int i; - for (i = 0; i < size >> PAGE_SHIFT; i++) { - ret = vm_insert_pfn(vma, - (unsigned long)vma->vm_start + i * PAGE_SIZE, - pfn + i); + for (i = 0; i < view.params.partial.size; i++) { + ret = vm_insert_pfn(vma, base + i * PAGE_SIZE, pfn + i); if (ret) break; } - obj->fault_mappable = true; - } else - ret = vm_insert_pfn(vma, - (unsigned long)vmf->virtual_address, - pfn + page_offset); + } else { + if (!obj->fault_mappable) { + unsigned long size = min_t(unsigned long, + vma->vm_end - vma->vm_start, + obj->base.size); + int i; + + for (i = 0; i < size >> PAGE_SHIFT; i++) { + ret = vm_insert_pfn(vma, + (unsigned long)vma->vm_start + i * PAGE_SIZE, + pfn + i); + if (ret) + break; + } + + obj->fault_mappable = true; + } else + ret = vm_insert_pfn(vma, + (unsigned long)vmf->virtual_address, + pfn + page_offset); + } unpin: - i915_gem_object_ggtt_unpin(obj); + i915_gem_object_ggtt_unpin_view(obj, &view); unlock: mutex_unlock(&dev->struct_mutex); out: @@ -1897,11 +1925,6 @@ i915_gem_mmap_gtt(struct drm_file *file, goto unlock; } - if (obj->base.size > dev_priv->gtt.mappable_end) { - ret = -E2BIG; - goto out; - } - if (obj->madv != I915_MADV_WILLNEED) { DRM_DEBUG("Attempting to mmap a purgeable buffer\n"); ret = -EFAULT;