From patchwork Wed Jan 26 15:21:54 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Matthew Auld X-Patchwork-Id: 12725258 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 4E9EDC3526D for ; Wed, 26 Jan 2022 15:23:11 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 258BC10E94B; Wed, 26 Jan 2022 15:22:31 +0000 (UTC) Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by gabe.freedesktop.org (Postfix) with ESMTPS id 78DF210E942; Wed, 26 Jan 2022 15:22:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1643210549; x=1674746549; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=CRgb7rJJ/ShL2opOzT8EOROznzqgOCliFBO44qDp6VM=; b=mOdP/axKaz02foIY41aw0atJvXX9QO9ttxQzKcxbmcjFqnFPeMS6YMdC JKkne6jk8J6H369Y6kD5Xokel6fJlJ+gIAuNbrua989llYHvQJ0Ylj4jk PcscsXRFCjWdAzCwH22GTdz85YO3mwbfEczJnu2PoCvEiGJxN00/Kl+xY 5YLB7MnJLpmhD2gDe3oezrfqZOp97UUZk0Y/nbMQ2dtfw1QkL6DxzHaF8 uGPBfQRgibBBHcbaadw8qsRjJ1EQZmL5pEnZwwDeX5Xfkxxlx5/5LTXJh c1xkzz5tVTk3l4foRCkXessb1Hv6Ymgti6ZM9OmO+aRRcudhYcXBuSU/b g==; X-IronPort-AV: E=McAfee;i="6200,9189,10238"; a="309885296" X-IronPort-AV: E=Sophos;i="5.88,318,1635231600"; d="scan'208";a="309885296" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Jan 2022 07:22:29 -0800 X-IronPort-AV: E=Sophos;i="5.88,318,1635231600"; d="scan'208";a="674386326" Received: from jamesstx-mobl.ger.corp.intel.com (HELO mwauld-desk1.intel.com) ([10.213.247.182]) by fmsmga001-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Jan 2022 07:22:27 -0800 From: Matthew Auld To: intel-gfx@lists.freedesktop.org Date: Wed, 26 Jan 2022 15:21:54 +0000 Message-Id: <20220126152155.3070602-20-matthew.auld@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220126152155.3070602-1-matthew.auld@intel.com> References: <20220126152155.3070602-1-matthew.auld@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 19/20] drm/i915/lmem: don't treat small BAR as an error 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?= , dri-devel@lists.freedesktop.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Just pass along the probed io_size. The backend should be able to utilize the entire range here, even if some of it is non-mappable. It does leave open with what to do with stolen local-memory. Signed-off-by: Matthew Auld Cc: Thomas Hellström --- drivers/gpu/drm/i915/gt/intel_region_lmem.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/gt/intel_region_lmem.c b/drivers/gpu/drm/i915/gt/intel_region_lmem.c index 2c7ec7ff79fd..b788fc2b3df8 100644 --- a/drivers/gpu/drm/i915/gt/intel_region_lmem.c +++ b/drivers/gpu/drm/i915/gt/intel_region_lmem.c @@ -200,6 +200,7 @@ static struct intel_memory_region *setup_lmem(struct intel_gt *gt) struct intel_memory_region *mem; resource_size_t min_page_size; resource_size_t io_start; + resource_size_t io_size; resource_size_t lmem_size; int err; @@ -210,7 +211,8 @@ static struct intel_memory_region *setup_lmem(struct intel_gt *gt) lmem_size = intel_uncore_read64(uncore, GEN12_GSMBASE); io_start = pci_resource_start(pdev, 2); - if (GEM_WARN_ON(lmem_size > pci_resource_len(pdev, 2))) + io_size = min(pci_resource_len(pdev, 2), lmem_size); + if (!io_size) return ERR_PTR(-ENODEV); min_page_size = HAS_64K_PAGES(i915) ? I915_GTT_PAGE_SIZE_64K : @@ -220,7 +222,7 @@ static struct intel_memory_region *setup_lmem(struct intel_gt *gt) lmem_size, min_page_size, io_start, - lmem_size, + io_size, INTEL_MEMORY_LOCAL, 0, &intel_region_lmem_ops);