From patchwork Wed Jul 13 13:38:14 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bob Beckett X-Patchwork-Id: 12916736 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0C574C433EF for ; Wed, 13 Jul 2022 13:38:59 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 455F810E418; Wed, 13 Jul 2022 13:38:46 +0000 (UTC) Received: from madras.collabora.co.uk (madras.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e5ab]) by gabe.freedesktop.org (Postfix) with ESMTPS id 1CC8010E95B; Wed, 13 Jul 2022 13:38:43 +0000 (UTC) Received: from hermes-devbox.fritz.box (82-71-8-225.dsl.in-addr.zen.co.uk [82.71.8.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: bbeckett) by madras.collabora.co.uk (Postfix) with ESMTPSA id 2532366019C5; Wed, 13 Jul 2022 14:38:41 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1657719521; bh=5MPDE6PLauo4xeTXuzQqjxRuaatIiJJgaRF7Azzw0o0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fEmBV92DTmAxhUcy73wR4rSi/rg1nPCZyXUE5o2+TmN6KaxS3kIYj/e5XIFnAyBOx oHVxY/754MrEjw2nIL7q/tTM/kAeMYYJzJYms7z7gzcTBucVvH4zzOULDbG3tb/Ngr +bOKljnG97lDg+SE8kMn51Olj0rNBz0E/HXiVnecfa9W7REPoRoarOrMFNRW7//xKJ ArURia99XXqHlb41YhvOTSewyF8HPXzBblL9FcYr8nLRJcuVssiwo6jbSd6Y+DrHTp 2SDmbWfVTghCEBC3lAwk+0ya7UX0MJGQmWx7xON9KK3oReRXUrh1fWVpTSexM2fq6B 7SwKcm1H1eP/A== From: Robert Beckett To: dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Tvrtko Ursulin , David Airlie , Daniel Vetter Date: Wed, 13 Jul 2022 14:38:14 +0100 Message-Id: <20220713133818.3699604-5-bob.beckett@collabora.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220713133818.3699604-1-bob.beckett@collabora.com> References: <20220713133818.3699604-1-bob.beckett@collabora.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v4 4/8] drm/i915: add gen6 ppgtt dummy creation function X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?utf-8?q?Thomas_Hellstr=C3=B6m?= , kernel@collabora.com, Matthew Auld , linux-kernel@vger.kernel.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Internal gem objects will soon just be volatile system memory region objects. To enable this, create a separate dummy object creation function for gen6 ppgtt. The object only exists as a fake object pointing to ggtt and gains no benefit in going via the internal backend. Instead, create a dummy gem object and avoid having to maintain a custom ops api in the internal backend, which makes later refactoring easier. Signed-off-by: Robert Beckett --- drivers/gpu/drm/i915/gt/gen6_ppgtt.c | 43 ++++++++++++++++++++++++++-- 1 file changed, 40 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/gt/gen6_ppgtt.c b/drivers/gpu/drm/i915/gt/gen6_ppgtt.c index 1bb766c79dcb..f3b660cfeb7f 100644 --- a/drivers/gpu/drm/i915/gt/gen6_ppgtt.c +++ b/drivers/gpu/drm/i915/gt/gen6_ppgtt.c @@ -372,6 +372,45 @@ static const struct drm_i915_gem_object_ops pd_dummy_obj_ops = { .put_pages = pd_dummy_obj_put_pages, }; +static struct drm_i915_gem_object * +i915_gem_object_create_dummy(struct drm_i915_private *i915, phys_addr_t size) +{ + static struct lock_class_key lock_class; + struct drm_i915_gem_object *obj; + unsigned int cache_level; + + GEM_BUG_ON(!size); + GEM_BUG_ON(!IS_ALIGNED(size, PAGE_SIZE)); + + if (overflows_type(size, obj->base.size)) + return ERR_PTR(-E2BIG); + + obj = i915_gem_object_alloc(); + if (!obj) + return ERR_PTR(-ENOMEM); + + drm_gem_private_object_init(&i915->drm, &obj->base, size); + i915_gem_object_init(obj, &pd_dummy_obj_ops, &lock_class, 0); + obj->mem_flags |= I915_BO_FLAG_STRUCT_PAGE; + + /* + * Mark the object as volatile, such that the pages are marked as + * dontneed whilst they are still pinned. As soon as they are unpinned + * they are allowed to be reaped by the shrinker, and the caller is + * expected to repopulate - the contents of this object are only valid + * whilst active and pinned. + */ + i915_gem_object_set_volatile(obj); + + obj->read_domains = I915_GEM_DOMAIN_CPU; + obj->write_domain = I915_GEM_DOMAIN_CPU; + + cache_level = HAS_LLC(i915) ? I915_CACHE_LLC : I915_CACHE_NONE; + i915_gem_object_set_cache_coherency(obj, cache_level); + + return obj; +} + static struct i915_page_directory * gen6_alloc_top_pd(struct gen6_ppgtt *ppgtt) { @@ -383,9 +422,7 @@ gen6_alloc_top_pd(struct gen6_ppgtt *ppgtt) if (unlikely(!pd)) return ERR_PTR(-ENOMEM); - pd->pt.base = __i915_gem_object_create_internal(ppgtt->base.vm.gt->i915, - &pd_dummy_obj_ops, - I915_PDES * SZ_4K); + pd->pt.base = i915_gem_object_create_dummy(ppgtt->base.vm.gt->i915, I915_PDES * SZ_4K); if (IS_ERR(pd->pt.base)) { err = PTR_ERR(pd->pt.base); pd->pt.base = NULL;