From patchwork Mon Feb 8 10:52:28 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chris Wilson X-Patchwork-Id: 12074897 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 543F5C433E0 for ; Mon, 8 Feb 2021 10:53:19 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id E40B664E45 for ; Mon, 8 Feb 2021 10:53:18 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E40B664E45 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=chris-wilson.co.uk Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 55FDB6E873; Mon, 8 Feb 2021 10:53:13 +0000 (UTC) Received: from fireflyinternet.com (unknown [77.68.26.236]) by gabe.freedesktop.org (Postfix) with ESMTPS id 1D8356E866 for ; Mon, 8 Feb 2021 10:52:56 +0000 (UTC) X-Default-Received-SPF: pass (skip=forwardok (res=PASS)) x-ip-name=78.156.69.177; Received: from build.alporthouse.com (unverified [78.156.69.177]) by fireflyinternet.com (Firefly Internet (M1)) with ESMTP id 23809230-1500050 for multiple; Mon, 08 Feb 2021 10:52:45 +0000 From: Chris Wilson To: intel-gfx@lists.freedesktop.org Date: Mon, 8 Feb 2021 10:52:28 +0000 Message-Id: <20210208105236.28498-23-chris@chris-wilson.co.uk> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210208105236.28498-1-chris@chris-wilson.co.uk> References: <20210208105236.28498-1-chris@chris-wilson.co.uk> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 23/31] drm/i915/gt: Use ppHWSP for unshared non-semaphore related timelines 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: Chris Wilson Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" When we are not using semaphores with a context/engine, we can simply reuse the same seqno location across wraps, but we still require each timeline to have its own address. For LRC submission, each context is prefixed by a per-process HWSP, which provides us with a unique location for each context-local timeline. A shared timeline that is common to multiple contexts will continue to use a separate page. This enables us to create position invariant contexts should we feel the need to relocate them. Initially they are automatically used by Broadwell/Braswell as they do not require independent timelines. Signed-off-by: Chris Wilson Cc: Joonas Lahtinen Reviewed-by: Matthew Brost --- drivers/gpu/drm/i915/gt/intel_lrc.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c index 8508b8d701c1..f9acd9e63066 100644 --- a/drivers/gpu/drm/i915/gt/intel_lrc.c +++ b/drivers/gpu/drm/i915/gt/intel_lrc.c @@ -833,6 +833,14 @@ pinned_timeline(struct intel_context *ce, struct intel_engine_cs *engine) return intel_timeline_create_from_engine(engine, page_unmask_bits(tl)); } +static struct intel_timeline * +pphwsp_timeline(struct intel_context *ce, struct i915_vma *state) +{ + return __intel_timeline_create(ce->engine->gt, state, + I915_GEM_HWS_SEQNO_ADDR | + INTEL_TIMELINE_RELATIVE_CONTEXT); +} + int lrc_alloc(struct intel_context *ce, struct intel_engine_cs *engine) { struct intel_ring *ring; @@ -860,8 +868,10 @@ int lrc_alloc(struct intel_context *ce, struct intel_engine_cs *engine) */ if (unlikely(ce->timeline)) tl = pinned_timeline(ce, engine); - else + else if (intel_engine_has_semaphores(engine)) tl = intel_timeline_create(engine->gt); + else + tl = pphwsp_timeline(ce, vma); if (IS_ERR(tl)) { err = PTR_ERR(tl); goto err_ring;