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=-19.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 D900BC4360C for ; Wed, 23 Dec 2020 03:04:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B6E4620705 for ; Wed, 23 Dec 2020 03:04:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731491AbgLWDDg (ORCPT ); Tue, 22 Dec 2020 22:03:36 -0500 Received: from mail.kernel.org ([198.145.29.99]:45492 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728643AbgLWCT3 (ORCPT ); Tue, 22 Dec 2020 21:19:29 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id CE86622525; Wed, 23 Dec 2020 02:18:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1608689935; bh=zk6cO27GUJVeOS+ID0F0Ks1lYJ3QJxO4vuZrb3FjT/g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PYafhoPP/ELwfg+H2JF1jdofTTmjDcCZzPELv+w9iCzlk8IGE/RfMK0TpHPPKmFM7 RNelKBOn44aSMEvPqTMRtNGNWKEVNJ8PbsdC6liw9aCBCegmPinJZOuoCTPCeiGuF9 /7hdFxFLTS0SuniPC3DjhxzO2eWOA29AsMHCHeH5GUra59nm4T/LllGEhTJdgsIIYs hH8N9d8dxO8JcVoRvPFN6xaY74fpB3OrvFp1h975aciT3eVilia3/SKBu5pjZX56W0 VtC9SJ71f1T9BuTrw5vBfHizydULdgiJ1uVhL/UWn8nZ5qzOBtbaL8jm+OEr+azZbb CWfvKNW6rrnxw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Bokun Zhang , Monk Liu , Alex Deucher , Sasha Levin , amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Subject: [PATCH AUTOSEL 5.4 032/130] drm/amd/amdgpu: Add rev_id workaround logic for SRIOV setup Date: Tue, 22 Dec 2020 21:16:35 -0500 Message-Id: <20201223021813.2791612-32-sashal@kernel.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20201223021813.2791612-1-sashal@kernel.org> References: <20201223021813.2791612-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Bokun Zhang [ Upstream commit de21e4aeb2b26128dcc5be1bcb2fafa73d041e51 ] - When we are under SRIOV setup, the rev_id cannot be read properly. Therefore, we will return default value for it Signed-off-by: Bokun Zhang Reviewed-by: Monk Liu Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/amdgpu/nbio_v2_3.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/nbio_v2_3.c b/drivers/gpu/drm/amd/amdgpu/nbio_v2_3.c index c05d78d4efc66..56887affc13be 100644 --- a/drivers/gpu/drm/amd/amdgpu/nbio_v2_3.c +++ b/drivers/gpu/drm/amd/amdgpu/nbio_v2_3.c @@ -34,8 +34,17 @@ static u32 nbio_v2_3_get_rev_id(struct amdgpu_device *adev) { - u32 tmp = RREG32_SOC15(NBIO, 0, mmRCC_DEV0_EPF0_STRAP0); + u32 tmp; + /* + * guest vm gets 0xffffffff when reading RCC_DEV0_EPF0_STRAP0, + * therefore we force rev_id to 0 (which is the default value) + */ + if (amdgpu_sriov_vf(adev)) { + return 0; + } + + tmp = RREG32_SOC15(NBIO, 0, mmRCC_DEV0_EPF0_STRAP0); tmp &= RCC_DEV0_EPF0_STRAP0__STRAP_ATI_REV_ID_DEV0_F0_MASK; tmp >>= RCC_DEV0_EPF0_STRAP0__STRAP_ATI_REV_ID_DEV0_F0__SHIFT; -- 2.27.0