From mboxrd@z Thu Jan 1 00:00:00 1970 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 BF16EC433DB for ; Tue, 26 Jan 2021 09:46:56 +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 6A91D2255F for ; Tue, 26 Jan 2021 09:46:56 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6A91D2255F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com 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 00BE689A56; Tue, 26 Jan 2021 09:46:56 +0000 (UTC) Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by gabe.freedesktop.org (Postfix) with ESMTPS id 7DC736E0C2 for ; Tue, 26 Jan 2021 09:46:42 +0000 (UTC) IronPort-SDR: icHMVUy1QoOVpqGtp0hScII+wXQjmYWCFHxCFaqsgJbXVSLD0WhFRO7/4d9biv3tRQG9MO55xU XJcn+4zqOu8Q== X-IronPort-AV: E=McAfee;i="6000,8403,9875"; a="159651570" X-IronPort-AV: E=Sophos;i="5.79,375,1602572400"; d="scan'208";a="159651570" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Jan 2021 01:46:42 -0800 IronPort-SDR: wcn201g7CCXncMKhPkBHyLMQXdddwu9sXR5va4GaxjDi6MeChw3c4V6pDiihkbHjSio7p2d/rq F4PQDmxNwHLg== X-IronPort-AV: E=Sophos;i="5.79,375,1602572400"; d="scan'208";a="387766446" Received: from shogg-mobl.ger.corp.intel.com (HELO mwauld-desk1.ger.corp.intel.com) ([10.252.19.250]) by orsmga008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Jan 2021 01:46:41 -0800 From: Matthew Auld To: intel-gfx@lists.freedesktop.org Date: Tue, 26 Jan 2021 09:46:09 +0000 Message-Id: <20210126094612.163290-4-matthew.auld@intel.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210126094612.163290-1-matthew.auld@intel.com> References: <20210126094612.163290-1-matthew.auld@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 4/7] drm/i915/dg1: Reserve first 1MB of local memory 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" From: Imre Deak On DG1 A0/B0 steppings the first 1MB of local memory must be reserved. One reason for this is that the 0xA0000-0xB0000 range is not accessible by the display, probably since this region is redirected to another memory location for legacy VGA compatibility. BSpec: 50586 Testcase: igt/kms_big_fb/linear-64bpp-rotate-0 v2: - Reserve the memory on B0 as well. v3: replace DRM_DEBUG/DRM_ERROR with drm_dbg/drm_err Signed-off-by: Imre Deak Signed-off-by: Matthew Auld --- drivers/gpu/drm/i915/gt/intel_region_lmem.c | 53 +++++++++++++++++++++ 1 file changed, 53 insertions(+) diff --git a/drivers/gpu/drm/i915/gt/intel_region_lmem.c b/drivers/gpu/drm/i915/gt/intel_region_lmem.c index 30959c1e535f..13ec2ecce2e7 100644 --- a/drivers/gpu/drm/i915/gt/intel_region_lmem.c +++ b/drivers/gpu/drm/i915/gt/intel_region_lmem.c @@ -137,6 +137,49 @@ intel_setup_fake_lmem(struct drm_i915_private *i915) return mem; } +static void get_legacy_lowmem_region(struct intel_uncore *uncore, + u64 *start, u32 *size) +{ + *start = 0; + *size = 0; + + if (!IS_DG1_REVID(uncore->i915, DG1_REVID_A0, DG1_REVID_B0)) + return; + + *size = SZ_1M; + + drm_dbg(&uncore->i915->drm, "LMEM: reserved legacy low-memory [0x%llx-0x%llx]\n", + *start, *start + *size); +} + +static int reserve_lowmem_region(struct intel_uncore *uncore, + struct intel_memory_region *mem) +{ + + u64 reserve_start; + u64 reserve_end; + u64 region_start; + u32 region_size; + int ret; + + get_legacy_lowmem_region(uncore, ®ion_start, ®ion_size); + reserve_start = region_start; + reserve_end = region_start + region_size; + + if (!reserve_end) + return 0; + + drm_dbg(&uncore->i915->drm, "LMEM: reserving low-memory region [0x%llx-0x%llx]\n", + reserve_start, reserve_end); + ret = i915_buddy_alloc_range(&mem->mm, &mem->reserved, + reserve_start, + reserve_end - reserve_start); + if (ret) + drm_err(&uncore->i915->drm, "LMEM: reserving low memory region failed\n"); + + return ret; +} + static struct intel_memory_region * setup_lmem(struct drm_i915_private *i915) { @@ -161,6 +204,16 @@ setup_lmem(struct drm_i915_private *i915) I915_GTT_PAGE_SIZE_4K, io_start, &intel_region_lmem_ops); + if (!IS_ERR(mem)) { + int err; + + err = reserve_lowmem_region(uncore, mem); + if (err) { + intel_memory_region_put(mem); + return ERR_PTR(err); + } + } + if (!IS_ERR(mem)) { drm_dbg(&i915->drm, "Intel graphics LMEM: %pR\n", &mem->region); drm_dbg(&i915->drm, "Intel graphics LMEM IO start: %pa\n", -- 2.26.2 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx