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=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,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 A67E1C43381 for ; Thu, 28 Mar 2019 12:40:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 79EA92173C for ; Thu, 28 Mar 2019 12:40:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727931AbfC1MkX (ORCPT ); Thu, 28 Mar 2019 08:40:23 -0400 Received: from mga04.intel.com ([192.55.52.120]:9515 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727109AbfC1Mgm (ORCPT ); Thu, 28 Mar 2019 08:36:42 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga104.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 28 Mar 2019 05:36:42 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,280,1549958400"; d="scan'208";a="286671437" Received: from black.fi.intel.com ([10.237.72.28]) by orsmga004.jf.intel.com with ESMTP; 28 Mar 2019 05:36:38 -0700 Received: by black.fi.intel.com (Postfix, from userid 1001) id 3099487B; Thu, 28 Mar 2019 14:36:34 +0200 (EET) From: Mika Westerberg To: linux-kernel@vger.kernel.org Cc: Michael Jamet , Yehezkel Bernat , Andreas Noever , Lukas Wunner , "David S . Miller" , Andy Shevchenko , Christian Kellner , Mario.Limonciello@dell.com, Mika Westerberg , netdev@vger.kernel.org Subject: [PATCH v3 09/36] thunderbolt: Move LC specific functionality into a separate file Date: Thu, 28 Mar 2019 15:36:06 +0300 Message-Id: <20190328123633.42882-10-mika.westerberg@linux.intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190328123633.42882-1-mika.westerberg@linux.intel.com> References: <20190328123633.42882-1-mika.westerberg@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org We will be adding more link controller functionality in subsequent patches and it does not make sense to keep all that in switch.c, so separate LC functionality into its own file. Signed-off-by: Mika Westerberg --- drivers/thunderbolt/Makefile | 2 +- drivers/thunderbolt/lc.c | 21 +++++++++++++++++++++ drivers/thunderbolt/switch.c | 21 ++++++++++----------- drivers/thunderbolt/tb.h | 3 +++ drivers/thunderbolt/tb_regs.h | 2 ++ 5 files changed, 37 insertions(+), 12 deletions(-) create mode 100644 drivers/thunderbolt/lc.c diff --git a/drivers/thunderbolt/Makefile b/drivers/thunderbolt/Makefile index f2f0de27252b..8531f15d3b3c 100644 --- a/drivers/thunderbolt/Makefile +++ b/drivers/thunderbolt/Makefile @@ -1,3 +1,3 @@ obj-${CONFIG_THUNDERBOLT} := thunderbolt.o thunderbolt-objs := nhi.o ctl.o tb.o switch.o cap.o path.o tunnel_pci.o eeprom.o -thunderbolt-objs += domain.o dma_port.o icm.o property.o xdomain.o +thunderbolt-objs += domain.o dma_port.o icm.o property.o xdomain.o lc.o diff --git a/drivers/thunderbolt/lc.c b/drivers/thunderbolt/lc.c new file mode 100644 index 000000000000..2134a55ed837 --- /dev/null +++ b/drivers/thunderbolt/lc.c @@ -0,0 +1,21 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Thunderbolt link controller support + * + * Copyright (C) 2019, Intel Corporation + * Author: Mika Westerberg + */ + +#include "tb.h" + +/** + * tb_lc_read_uuid() - Read switch UUID from link controller common register + * @sw: Switch whose UUID is read + * @uuid: UUID is placed here + */ +int tb_lc_read_uuid(struct tb_switch *sw, u32 *uuid) +{ + if (!sw->cap_lc) + return -EINVAL; + return tb_sw_read(sw, uuid, TB_CFG_SWITCH, sw->cap_lc + TB_LC_FUSE, 4); +} diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c index 1e29c06947af..63ff4c753d89 100644 --- a/drivers/thunderbolt/switch.c +++ b/drivers/thunderbolt/switch.c @@ -1182,6 +1182,10 @@ struct tb_switch *tb_switch_alloc(struct tb *tb, struct device *parent, } sw->cap_plug_events = cap; + cap = tb_switch_find_vse_cap(sw, TB_VSE_CAP_LINK_CONTROLLER); + if (cap > 0) + sw->cap_lc = cap; + /* Root switch is always authorized */ if (!route) sw->authorized = true; @@ -1278,22 +1282,17 @@ int tb_switch_configure(struct tb_switch *sw) static int tb_switch_set_uuid(struct tb_switch *sw) { u32 uuid[4]; - int cap, ret; + int ret; - ret = 0; if (sw->uuid) - return ret; + return 0; /* * The newer controllers include fused UUID as part of link * controller specific registers */ - cap = tb_switch_find_vse_cap(sw, TB_VSE_CAP_LINK_CONTROLLER); - if (cap > 0) { - ret = tb_sw_read(sw, uuid, TB_CFG_SWITCH, cap + 3, 4); - if (ret) - return ret; - } else { + ret = tb_lc_read_uuid(sw, uuid); + if (ret) { /* * ICM generates UUID based on UID and fills the upper * two words with ones. This is not strictly following @@ -1308,8 +1307,8 @@ static int tb_switch_set_uuid(struct tb_switch *sw) sw->uuid = kmemdup(uuid, sizeof(uuid), GFP_KERNEL); if (!sw->uuid) - ret = -ENOMEM; - return ret; + return -ENOMEM; + return 0; } static int tb_switch_add_dma_port(struct tb_switch *sw) diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h index a166265dfcf9..e52d39b25266 100644 --- a/drivers/thunderbolt/tb.h +++ b/drivers/thunderbolt/tb.h @@ -63,6 +63,7 @@ struct tb_switch_nvm { * @device_name: Name of the device (or %NULL if not known) * @generation: Switch Thunderbolt generation * @cap_plug_events: Offset to the plug events capability (%0 if not found) + * @cap_lc: Offset to the link controller capability (%0 if not found) * @is_unplugged: The switch is going away * @drom: DROM of the switch (%NULL if not found) * @nvm: Pointer to the NVM if the switch has one (%NULL otherwise) @@ -96,6 +97,7 @@ struct tb_switch { const char *device_name; unsigned int generation; int cap_plug_events; + int cap_lc; bool is_unplugged; u8 *drom; struct tb_switch_nvm *nvm; @@ -462,6 +464,7 @@ bool tb_path_is_invalid(struct tb_path *path); int tb_drom_read(struct tb_switch *sw); int tb_drom_read_uid_only(struct tb_switch *sw, u64 *uid); +int tb_lc_read_uuid(struct tb_switch *sw, u32 *uuid); static inline int tb_route_length(u64 route) { diff --git a/drivers/thunderbolt/tb_regs.h b/drivers/thunderbolt/tb_regs.h index 6f1ff04ee195..4895ae9f0b40 100644 --- a/drivers/thunderbolt/tb_regs.h +++ b/drivers/thunderbolt/tb_regs.h @@ -237,5 +237,7 @@ struct tb_regs_hop { u32 unknown3:4; /* set to zero */ } __packed; +/* Common link controller registers */ +#define TB_LC_FUSE 0x03 #endif -- 2.20.1