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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, 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 18DD6C46475 for ; Mon, 10 May 2021 11:07:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0AF4C6191E for ; Mon, 10 May 2021 11:07:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235799AbhEJLGL (ORCPT ); Mon, 10 May 2021 07:06:11 -0400 Received: from mail.kernel.org ([198.145.29.99]:59618 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232565AbhEJKp6 (ORCPT ); Mon, 10 May 2021 06:45:58 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 7B90261935; Mon, 10 May 2021 10:36:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1620643011; bh=pn463DpuLQ0mVp4jzjh8oJK03lZfNaaZKSbL1aWfd64=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hsQ8lN16M8RbtGuLn+R/PzJPbcg/+zW1kNShFfKUZAcK6Oqs4SyfDTdngCYK11x8k NNj78PwSYo7Qi9ewfCb8ZQxlyDdVjSwv72lzBbSXyBwstW9jN7nj/UjIhqWqZwDwC5 /5RzcrYXZU6UxCdQx7k1XR35S/fW7OWGCSnAmt/8= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jonathan Kim , Amber Lin , Alex Deucher , Sasha Levin Subject: [PATCH 5.10 141/299] drm/amdgpu: mask the xgmi number of hops reported from psp to kfd Date: Mon, 10 May 2021 12:18:58 +0200 Message-Id: <20210510102009.618713488@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210510102004.821838356@linuxfoundation.org> References: <20210510102004.821838356@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jonathan Kim [ Upstream commit 4ac5617c4b7d0f0a8f879997f8ceaa14636d7554 ] The psp supplies the link type in the upper 2 bits of the psp xgmi node information num_hops field. With a new link type, Aldebaran has these bits set to a non-zero value (1 = xGMI3) so the KFD topology will report the incorrect IO link weights without proper masking. The actual number of hops is located in the 3 least significant bits of this field so mask if off accordingly before passing it to the KFD. Signed-off-by: Jonathan Kim Reviewed-by: Amber Lin Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c index 1162913c8bf4..0526dec1d736 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c @@ -465,15 +465,22 @@ int amdgpu_xgmi_update_topology(struct amdgpu_hive_info *hive, struct amdgpu_dev } +/* + * NOTE psp_xgmi_node_info.num_hops layout is as follows: + * num_hops[7:6] = link type (0 = xGMI2, 1 = xGMI3, 2/3 = reserved) + * num_hops[5:3] = reserved + * num_hops[2:0] = number of hops + */ int amdgpu_xgmi_get_hops_count(struct amdgpu_device *adev, struct amdgpu_device *peer_adev) { struct psp_xgmi_topology_info *top = &adev->psp.xgmi_context.top_info; + uint8_t num_hops_mask = 0x7; int i; for (i = 0 ; i < top->num_nodes; ++i) if (top->nodes[i].node_id == peer_adev->gmc.xgmi.node_id) - return top->nodes[i].num_hops; + return top->nodes[i].num_hops & num_hops_mask; return -EINVAL; } -- 2.30.2