Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S938446AbcKXJSj (ORCPT ); Thu, 24 Nov 2016 04:18:39 -0500 Received: from mail-pg0-f65.google.com ([74.125.83.65]:33478 "EHLO mail-pg0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935513AbcKXJSi (ORCPT ); Thu, 24 Nov 2016 04:18:38 -0500 From: sunil.kovvuri@gmail.com To: netdev@vger.kernel.org Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Sunil Goutham Subject: [PATCH 1/4] net: thunderx: 80xx BGX0 configuration changes Date: Thu, 24 Nov 2016 14:48:00 +0530 Message-Id: <1479979083-15963-2-git-send-email-sunil.kovvuri@gmail.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1479979083-15963-1-git-send-email-sunil.kovvuri@gmail.com> References: <1479979083-15963-1-git-send-email-sunil.kovvuri@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1875 Lines: 49 From: Sunil Goutham On 80xx only one lane of DLM0 and DLM1 (of BGX0) can be used , so even though lmac count may be 2 but LMAC1 should use serdes lane of DLM1. Since it's not possible to distinguish 80xx from 81xx as PCI devid are same, this patch adds this config support by replying on what firmware configures the lmacs with. Signed-off-by: Sunil Goutham --- drivers/net/ethernet/cavium/thunder/thunder_bgx.c | 20 +++++++++++++++++--- 1 file changed, 17 insertions(+), 3 deletions(-) diff --git a/drivers/net/ethernet/cavium/thunder/thunder_bgx.c b/drivers/net/ethernet/cavium/thunder/thunder_bgx.c index 050e21f..1d6214b 100644 --- a/drivers/net/ethernet/cavium/thunder/thunder_bgx.c +++ b/drivers/net/ethernet/cavium/thunder/thunder_bgx.c @@ -970,11 +970,25 @@ static void bgx_set_lmac_config(struct bgx *bgx, u8 idx) lmac_set_training(bgx, lmac, lmac->lmacid); lmac_set_lane2sds(bgx, lmac); - /* Set LMAC type of other lmac on same DLM i.e LMAC 1/3 */ olmac = &bgx->lmac[idx + 1]; - olmac->lmac_type = lmac->lmac_type; + /* Check if other LMAC on the same DLM is already configured by + * firmware, if so use the same config or else set as same, as + * that of LMAC 0/2. + * This check is needed as on 80xx only one lane of each of the + * DLM of BGX0 is used, so have to rely on firmware for + * distingushing 80xx from 81xx. + */ + cmr_cfg = bgx_reg_read(bgx, idx + 1, BGX_CMRX_CFG); + lmac_type = (u8)((cmr_cfg >> 8) & 0x07); + lane_to_sds = (u8)(cmr_cfg & 0xFF); + if ((lmac_type == 0) && (lane_to_sds == 0xE4)) { + olmac->lmac_type = lmac->lmac_type; + lmac_set_lane2sds(bgx, olmac); + } else { + olmac->lmac_type = lmac_type; + olmac->lane_to_sds = lane_to_sds; + } lmac_set_training(bgx, olmac, olmac->lmacid); - lmac_set_lane2sds(bgx, olmac); } } -- 2.7.4