From patchwork Sat Jun 2 00:40:28 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lionel Landwerlin X-Patchwork-Id: 10444451 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id C418360234 for ; Sat, 2 Jun 2018 00:40:40 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B5D9328900 for ; Sat, 2 Jun 2018 00:40:40 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id AA1F028B01; Sat, 2 Jun 2018 00:40:40 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 55F6D28B03 for ; Sat, 2 Jun 2018 00:40:40 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 25D8E6E7DA; Sat, 2 Jun 2018 00:40:38 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga18.intel.com (mga18.intel.com [134.134.136.126]) by gabe.freedesktop.org (Postfix) with ESMTPS id 8704A6E7D9 for ; Sat, 2 Jun 2018 00:40:36 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga106.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 01 Jun 2018 17:40:36 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.49,467,1520924400"; d="scan'208";a="54130140" Received: from igorsurm-mobl2.ccr.corp.intel.com (HELO delly.ger.corp.intel.com) ([10.252.10.110]) by FMSMGA003.fm.intel.com with ESMTP; 01 Jun 2018 17:40:34 -0700 From: Lionel Landwerlin To: intel-gfx@lists.freedesktop.org Date: Sat, 2 Jun 2018 01:40:28 +0100 Message-Id: <20180602004029.28038-2-lionel.g.landwerlin@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180602004029.28038-1-lionel.g.landwerlin@intel.com> References: <20180602004029.28038-1-lionel.g.landwerlin@intel.com> Subject: [Intel-gfx] [PATCH v3 1/2] drm/i915: drop one bit on the hw_id when using guc X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.23 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-Virus-Scanned: ClamAV using ClamSMTP We currently using GuC as a proxy to the hardware. When Guc is used in such mode, it consumes the bit 20 of the hw_id to indicate that the workload was submitted by proxy. So far we probably haven't seen the issue because we need to allocate 1048576+ contexts to hit this issue. Still, we should avoid allocating the hw_id on that bit and restrict to bits [0:19] (i.e 20bits instead of 21). v2: Leave the max hw_id computation in i915_gem_context.c (Michel) v3: Be consistent on if/else usage (Chris) Signed-off-by: Lionel Landwerlin BSpec: 1237 Reviewed-by: Michel Thierry Acked-by: Chris Wilson --- drivers/gpu/drm/i915/i915_drv.h | 1 + drivers/gpu/drm/i915/i915_gem_context.c | 15 ++++++++++++--- drivers/gpu/drm/i915/intel_lrc.c | 2 +- 3 files changed, 14 insertions(+), 4 deletions(-) -- 2.17.1 diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 38157df6ff5c..0ae88b671e8d 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -1841,6 +1841,7 @@ struct drm_i915_private { */ struct ida hw_ida; #define MAX_CONTEXT_HW_ID (1<<21) /* exclusive */ +#define MAX_GUC_CONTEXT_HW_ID (1 << 20) /* exclusive */ #define GEN11_MAX_CONTEXT_HW_ID (1<<11) /* exclusive */ } contexts; diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c index 94e4db1870aa..38c6e9e4e91b 100644 --- a/drivers/gpu/drm/i915/i915_gem_context.c +++ b/drivers/gpu/drm/i915/i915_gem_context.c @@ -208,10 +208,19 @@ static int assign_hw_id(struct drm_i915_private *dev_priv, unsigned *out) int ret; unsigned int max; - if (INTEL_GEN(dev_priv) >= 11) + if (INTEL_GEN(dev_priv) >= 11) { max = GEN11_MAX_CONTEXT_HW_ID; - else - max = MAX_CONTEXT_HW_ID; + } else { + /* + * When using GuC in proxy submission, GuC consumes the + * highest bit in the context id to indicate proxy submission. + */ + if (USES_GUC_SUBMISSION(dev_priv)) + max = MAX_GUC_CONTEXT_HW_ID; + else + max = MAX_CONTEXT_HW_ID; + } + ret = ida_simple_get(&dev_priv->contexts.hw_ida, 0, max, GFP_KERNEL); diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c index 517e92c6a70b..d09d2b79552f 100644 --- a/drivers/gpu/drm/i915/intel_lrc.c +++ b/drivers/gpu/drm/i915/intel_lrc.c @@ -200,7 +200,7 @@ static inline bool need_preempt(const struct intel_engine_cs *engine, * * bits 0-11: flags, GEN8_CTX_* (cached in ctx->desc_template) * bits 12-31: LRCA, GTT address of (the HWSP of) this context - * bits 32-52: ctx ID, a globally unique tag + * bits 32-52: ctx ID, a globally unique tag (highest bit used by GuC) * bits 53-54: mbz, reserved for use by hardware * bits 55-63: group ID, currently unused and set to 0 *