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Thu, 7 Jan 2021 17:50:51 +0000 From: Nirmoy Das To: bhelgaas@google.com Cc: ckoenig.leichtzumerken@gmail.com, linux-pci@vger.kernel.org, dri-devel@lists.freedesktop.org, devspam@moreofthesa.me.uk, Nirmoy Das , =?UTF-8?q?Christian=20K=C3=B6nig?= Subject: [PATCH 3/4] drm/amdgpu: Resize BAR0 to the maximum available size, even if it doesn't cover VRAM Date: Thu, 7 Jan 2021 18:50:16 +0100 Message-Id: <20210107175017.15893-4-nirmoy.das@amd.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210107175017.15893-1-nirmoy.das@amd.com> References: <20210107175017.15893-1-nirmoy.das@amd.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Originating-IP: [217.86.111.165] X-ClientProxiedBy: AM0PR03CA0093.eurprd03.prod.outlook.com (2603:10a6:208:69::34) To DM6PR12MB3916.namprd12.prod.outlook.com (2603:10b6:5:1ca::21) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from brihaspati.fritz.box (217.86.111.165) by AM0PR03CA0093.eurprd03.prod.outlook.com (2603:10a6:208:69::34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3742.6 via Frontend Transport; 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For example, my RX 5600 XT, which advertises 256MB, 512MB and 1GB. Signed-off-by: Darren Salt Signed-off-by: Christian König Signed-off-by: Nirmoy Das --- drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index dce0e66b2364..390f2cc13df7 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -1090,7 +1090,7 @@ void amdgpu_device_wb_free(struct amdgpu_device *adev, u32 wb) int amdgpu_device_resize_fb_bar(struct amdgpu_device *adev) { u64 space_needed = roundup_pow_of_two(adev->gmc.real_vram_size); - u32 rbar_size = order_base_2(((space_needed >> 20) | 1)) - 1; + int rbar_size = pci_rebar_bytes_to_size(adev->gmc.real_vram_size); struct pci_bus *root; struct resource *res; unsigned i; @@ -1121,6 +1121,10 @@ int amdgpu_device_resize_fb_bar(struct amdgpu_device *adev) if (!res) return 0; + /* Limit the BAR size to what is available */ + rbar_size = min(fls(pci_rebar_get_possible_sizes(adev->pdev, 0)) - 1, + rbar_size); + /* Disable memory decoding while we change the BAR addresses and size */ pci_read_config_word(adev->pdev, PCI_COMMAND, &cmd); pci_write_config_word(adev->pdev, PCI_COMMAND, -- 2.29.2 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=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,MSGID_FROM_MTA_HEADER,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 3BCC8C433DB for ; Thu, 7 Jan 2021 17:50:58 +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 07210233FB for ; 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