From patchwork Wed Jul 29 16:23:55 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michel Thierry X-Patchwork-Id: 6895211 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 78A099F358 for ; Wed, 29 Jul 2015 16:24:26 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 4BF8B20660 for ; Wed, 29 Jul 2015 16:24:25 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id 3ECAF20519 for ; Wed, 29 Jul 2015 16:24:24 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 485E06EC2F; Wed, 29 Jul 2015 09:24:22 -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 D9E686EC22 for ; Wed, 29 Jul 2015 09:24:17 -0700 (PDT) Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga101.jf.intel.com with ESMTP; 29 Jul 2015 09:24:18 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.15,571,1432623600"; d="scan'208";a="737993721" Received: from michelth-linux2.isw.intel.com ([10.102.226.189]) by orsmga001.jf.intel.com with ESMTP; 29 Jul 2015 09:24:17 -0700 From: Michel Thierry To: intel-gfx@lists.freedesktop.org Date: Wed, 29 Jul 2015 17:23:55 +0100 Message-Id: <1438187043-34267-12-git-send-email-michel.thierry@intel.com> X-Mailer: git-send-email 2.4.5 In-Reply-To: <1438187043-34267-1-git-send-email-michel.thierry@intel.com> References: <1438187043-34267-1-git-send-email-michel.thierry@intel.com> Cc: akash.goel@intel.com Subject: [Intel-gfx] [PATCH v6 11/19] drm/i915/gen8: Initialize PDPs and PML4 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: , MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Spam-Status: No, score=-5.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, 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 Similar to PDs, while setting up a page directory pointer, make all entries of the pdp point to the scratch pd before mapping (and make all its entries point to the scratch page); this is to be safe in case of out of bound access or proactive prefetch. Also add a scratch pdp, which the PML4 entries point to. v2: Handle scratch_pdp allocation failure correctly, and keep initialize_px functions together (Akash) v3: Rebase after Mika's ppgtt cleanup / scratch merge patch series. Rely on the added macros to initialize the pdps. v4: Rebase after final merged version of Mika's ppgtt/scratch patches (and removed commit message part related to v3). v5: Update commit message to also mention PML4 table initialization and the new scratch pdp (Akash). Suggested-by: Akash Goel Signed-off-by: Michel Thierry Reviewed-by: "Akash Goel " --- drivers/gpu/drm/i915/i915_gem_gtt.c | 38 +++++++++++++++++++++++++++++++++++++ drivers/gpu/drm/i915/i915_gem_gtt.h | 1 + 2 files changed, 39 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c index 7070d42..73cfe56 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -602,6 +602,27 @@ static void free_pdp(struct drm_device *dev, } } +static void gen8_initialize_pdp(struct i915_address_space *vm, + struct i915_page_directory_pointer *pdp) +{ + gen8_ppgtt_pdpe_t scratch_pdpe; + + scratch_pdpe = gen8_pdpe_encode(px_dma(vm->scratch_pd), I915_CACHE_LLC); + + fill_px(vm->dev, pdp, scratch_pdpe); +} + +static void gen8_initialize_pml4(struct i915_address_space *vm, + struct i915_pml4 *pml4) +{ + gen8_ppgtt_pml4e_t scratch_pml4e; + + scratch_pml4e = gen8_pml4e_encode(px_dma(vm->scratch_pdp), + I915_CACHE_LLC); + + fill_px(vm->dev, pml4, scratch_pml4e); +} + static void gen8_setup_page_directory(struct i915_hw_ppgtt *ppgtt, struct i915_page_directory_pointer *pdp, @@ -863,8 +884,20 @@ static int gen8_init_scratch(struct i915_address_space *vm) return PTR_ERR(vm->scratch_pd); } + if (USES_FULL_48BIT_PPGTT(dev)) { + vm->scratch_pdp = alloc_pdp(dev); + if (IS_ERR(vm->scratch_pdp)) { + free_pd(dev, vm->scratch_pd); + free_pt(dev, vm->scratch_pt); + free_scratch_page(dev, vm->scratch_page); + return PTR_ERR(vm->scratch_pdp); + } + } + gen8_initialize_pt(vm, vm->scratch_pt); gen8_initialize_pd(vm, vm->scratch_pd); + if (USES_FULL_48BIT_PPGTT(dev)) + gen8_initialize_pdp(vm, vm->scratch_pdp); return 0; } @@ -873,6 +906,8 @@ static void gen8_free_scratch(struct i915_address_space *vm) { struct drm_device *dev = vm->dev; + if (USES_FULL_48BIT_PPGTT(dev)) + free_pdp(dev, vm->scratch_pdp); free_pd(dev, vm->scratch_pd); free_pt(dev, vm->scratch_pt); free_scratch_page(dev, vm->scratch_page); @@ -1074,6 +1109,7 @@ gen8_ppgtt_alloc_page_dirpointers(struct i915_address_space *vm, if (IS_ERR(pdp)) goto unwind_out; + gen8_initialize_pdp(vm, pdp); pml4->pdps[pml4e] = pdp; __set_bit(pml4e, new_pdps); trace_i915_page_directory_pointer_entry_alloc(vm, @@ -1353,6 +1389,8 @@ static int gen8_ppgtt_init(struct i915_hw_ppgtt *ppgtt) if (ret) goto free_scratch; + gen8_initialize_pml4(&ppgtt->base, &ppgtt->pml4); + ppgtt->base.total = 1ULL << 48; ppgtt->switch_mm = gen8_48b_mm_switch; } else { diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.h b/drivers/gpu/drm/i915/i915_gem_gtt.h index 11d44b3..70c50e7 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.h +++ b/drivers/gpu/drm/i915/i915_gem_gtt.h @@ -278,6 +278,7 @@ struct i915_address_space { struct i915_page_scratch *scratch_page; struct i915_page_table *scratch_pt; struct i915_page_directory *scratch_pd; + struct i915_page_directory_pointer *scratch_pdp; /* GEN8+ & 48b PPGTT */ /** * List of objects currently involved in rendering.