From patchwork Wed Jun 10 16:46:47 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michel Thierry X-Patchwork-Id: 6583571 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 [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 8CBFAC0434 for ; Wed, 10 Jun 2015 16:47:03 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id B3AA1205C1 for ; Wed, 10 Jun 2015 16:47:02 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id 71F00203B6 for ; Wed, 10 Jun 2015 16:46:57 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id EE55F7A0FC; Wed, 10 Jun 2015 09:46:56 -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 CC3396E50F for ; Wed, 10 Jun 2015 09:46:55 -0700 (PDT) Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga101.jf.intel.com with ESMTP; 10 Jun 2015 09:46:55 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.13,588,1427785200"; d="scan'208";a="708681291" Received: from michelth-linux.isw.intel.com ([10.102.226.66]) by orsmga001.jf.intel.com with ESMTP; 10 Jun 2015 09:46:55 -0700 From: Michel Thierry To: intel-gfx@lists.freedesktop.org Date: Wed, 10 Jun 2015 17:46:47 +0100 Message-Id: <1433954816-13787-11-git-send-email-michel.thierry@intel.com> X-Mailer: git-send-email 2.4.3 In-Reply-To: <1433954816-13787-1-git-send-email-michel.thierry@intel.com> References: <1433954816-13787-1-git-send-email-michel.thierry@intel.com> Subject: [Intel-gfx] [PATCH v2 10/18] drm/i915/gen8: Pass sg_iter through pte inserts 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=-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 As a step towards implementing 4 levels, while not discarding the existing pte insert functions, we need to pass the sg_iter through. The current function understands to the page directory granularity. An object's pages may span the page directory, and so using the iter directly as we write the PTEs allows the iterator to stay coherent through a VMA insert operation spanning multiple page table levels. v2: Rebase after s/page_tables/page_table/. v3: Rebase after Mika's ppgtt cleanup / scratch merge patch series; updated commit message (s/map/insert). Signed-off-by: Ben Widawsky Signed-off-by: Michel Thierry (v2+) --- drivers/gpu/drm/i915/i915_gem_gtt.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c index ea20e5a..1c9f662 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -880,7 +880,7 @@ static void gen8_ppgtt_clear_range(struct i915_address_space *vm, static void gen8_ppgtt_insert_pte_entries(struct i915_address_space *vm, struct i915_page_directory_pointer *pdp, - struct sg_table *pages, + struct sg_page_iter *sg_iter, uint64_t start, enum i915_cache_level cache_level) { @@ -890,11 +890,10 @@ gen8_ppgtt_insert_pte_entries(struct i915_address_space *vm, unsigned pdpe = start >> GEN8_PDPE_SHIFT & GEN8_PDPE_MASK; unsigned pde = start >> GEN8_PDE_SHIFT & GEN8_PDE_MASK; unsigned pte = start >> GEN8_PTE_SHIFT & GEN8_PTE_MASK; - struct sg_page_iter sg_iter; pt_vaddr = NULL; - for_each_sg_page(pages->sgl, &sg_iter, pages->nents, 0) { + while (__sg_page_iter_next(sg_iter)) { if (pt_vaddr == NULL) { struct i915_page_directory *pd = pdp->page_directory[pdpe]; struct i915_page_table *pt = pd->page_table[pde]; @@ -902,7 +901,7 @@ gen8_ppgtt_insert_pte_entries(struct i915_address_space *vm, } pt_vaddr[pte] = - gen8_pte_encode(sg_page_iter_dma_address(&sg_iter), + gen8_pte_encode(sg_page_iter_dma_address(sg_iter), cache_level, true); if (++pte == GEN8_PTES) { kunmap_px(ppgtt, pt_vaddr); @@ -928,8 +927,10 @@ static void gen8_ppgtt_insert_entries(struct i915_address_space *vm, struct i915_hw_ppgtt *ppgtt = container_of(vm, struct i915_hw_ppgtt, base); struct i915_page_directory_pointer *pdp = &ppgtt->pdp; /* FIXME: 48b */ + struct sg_page_iter sg_iter; - gen8_ppgtt_insert_pte_entries(vm, pdp, pages, start, cache_level); + __sg_page_iter_start(&sg_iter, pages->sgl, sg_nents(pages->sgl), 0); + gen8_ppgtt_insert_pte_entries(vm, pdp, &sg_iter, start, cache_level); } static void gen8_free_page_tables(struct drm_device *dev,