From patchwork Mon May 26 15:18:01 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andreas Noever X-Patchwork-Id: 4243671 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Original-To: patchwork-linux-pci@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id F14FA9F333 for ; Mon, 26 May 2014 15:28:23 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id F203B2016C for ; Mon, 26 May 2014 15:28:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1A830201FA for ; Mon, 26 May 2014 15:28:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752672AbaEZPS3 (ORCPT ); Mon, 26 May 2014 11:18:29 -0400 Received: from mail-wg0-f50.google.com ([74.125.82.50]:59048 "EHLO mail-wg0-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752539AbaEZPS1 (ORCPT ); Mon, 26 May 2014 11:18:27 -0400 Received: by mail-wg0-f50.google.com with SMTP id x12so8087889wgg.21 for ; Mon, 26 May 2014 08:18:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=BcsqMf8/5iAtxbuRfV5gMksMkwExEck5y8obiK8fBbI=; b=NYHZrZ/cOjX41NN4ffP0F3iubaPQOPkIymjCm9xAs5XoCv3kmQdz8O61nXah8M4BUE ga+015KsNJ4rj8/AZH/H4l5/44uYAsnvfO0KXo/4C5XrfoWO1mT5JFZma6XbjxNYtdId RZSY0VHURAVUJJZsAEgPxXD5qtuixaMwdWvYy69i8+XURsLFL7lu2vvqTc//zQ9Wkaxk PNrnVwRu4XH5Dz22MmpRed73f01wZSV7KSX8KJlv5WG2T71hNQmMKQYG1rIZdJuc8bwD XyvZ9KNivD1xfwbFnH4Ms1fPH1mTRsD4BM+V8aWwt3GWitn3dfv4xf8vB+DGsd8L4skH Cgjg== X-Received: by 10.180.126.33 with SMTP id mv1mr28692541wib.6.1401117505374; Mon, 26 May 2014 08:18:25 -0700 (PDT) Received: from linuxbook.inf.ethz.ch (anoever.inf.ethz.ch. [129.132.153.240]) by mx.google.com with ESMTPSA id cv4sm27564479wjc.34.2014.05.26.08.18.24 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 26 May 2014 08:18:24 -0700 (PDT) From: Andreas Noever To: linux-kernel@vger.kernel.org, Matthew Garrett , Greg KH , Bjorn Helgaas , linux-pci@vger.kernel.org Cc: Andreas Noever Subject: [PATCH v3 04/15] thunderbolt: Add tb_regs.h Date: Mon, 26 May 2014 17:18:01 +0200 Message-Id: <1401117492-2870-5-git-send-email-andreas.noever@gmail.com> X-Mailer: git-send-email 1.9.3 In-Reply-To: <1401117492-2870-1-git-send-email-andreas.noever@gmail.com> References: <1401117492-2870-1-git-send-email-andreas.noever@gmail.com> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Spam-Status: No, score=-7.4 required=5.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, T_DKIM_INVALID, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Every thunderbolt device consists (logically) of a switch with multiple ports. Every port contains up to four config regions (HOPS, PORT, SWITCH, COUNTERS) which are used to configure the device. The tb_regs.h file contains all known registers and capabilities from these config regions. Signed-off-by: Andreas Noever --- drivers/thunderbolt/tb.c | 5 + drivers/thunderbolt/tb_regs.h | 213 ++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 218 insertions(+) create mode 100644 drivers/thunderbolt/tb_regs.h diff --git a/drivers/thunderbolt/tb.c b/drivers/thunderbolt/tb.c index 6920979..164dea0 100644 --- a/drivers/thunderbolt/tb.c +++ b/drivers/thunderbolt/tb.c @@ -9,6 +9,7 @@ #include #include "tb.h" +#include "tb_regs.h" /* hotplug handling */ @@ -100,6 +101,10 @@ struct tb *thunderbolt_alloc_and_start(struct tb_nhi *nhi) { struct tb *tb; + BUILD_BUG_ON(sizeof(struct tb_regs_switch_header) != 5 * 4); + BUILD_BUG_ON(sizeof(struct tb_regs_port_header) != 8 * 4); + BUILD_BUG_ON(sizeof(struct tb_regs_hop) != 2 * 4); + tb = kzalloc(sizeof(*tb), GFP_KERNEL); if (!tb) return NULL; diff --git a/drivers/thunderbolt/tb_regs.h b/drivers/thunderbolt/tb_regs.h new file mode 100644 index 0000000..6577af7 --- /dev/null +++ b/drivers/thunderbolt/tb_regs.h @@ -0,0 +1,213 @@ +/* + * Thunderbolt Cactus Ridge driver - Port/Switch config area registers + * + * Every thunderbolt device consists (logically) of a switch with multiple + * ports. Every port contains up to four config regions (HOPS, PORT, SWITCH, + * COUNTERS) which are used to configure the device. + * + * Copyright (c) 2014 Andreas Noever + */ + +#ifndef _TB_REGS +#define _TB_REGS + +#include + + +#define TB_ROUTE_SHIFT 8 /* number of bits in a port entry of a route */ + + +/* + * TODO: should be 63? But we do not know how to receive frames larger than 256 + * bytes at the frame level. (header + checksum = 16, 60*4 = 240) + */ +#define TB_MAX_CONFIG_RW_LENGTH 60 + +enum tb_cap { + TB_CAP_PHY = 0x0001, + TB_CAP_TIME1 = 0x0003, + TB_CAP_PCIE = 0x0004, + TB_CAP_I2C = 0x0005, + TB_CAP_PLUG_EVENTS = 0x0105, /* also EEPROM */ + TB_CAP_TIME2 = 0x0305, + TB_CAL_IECS = 0x0405, + TB_CAP_LINK_CONTROLLER = 0x0605, /* also IECS */ +}; + +enum tb_port_state { + TB_PORT_DISABLED = 0, /* tb_cap_phy.disable == 1 */ + TB_PORT_CONNECTING = 1, /* retry */ + TB_PORT_UP = 2, + TB_PORT_UNPLUGGED = 7, +}; + +/* capability headers */ + +struct tb_cap_basic { + u8 next; + /* enum tb_cap cap:8; prevent "narrower than values of its type" */ + u8 cap; /* if cap == 0x05 then we have a extended capability */ +} __packed; + +struct tb_cap_extended_short { + u8 next; /* if next and length are zero then we have a long cap */ + enum tb_cap cap:16; + u8 length; +} __packed; + +struct tb_cap_extended_long { + u8 zero1; + enum tb_cap cap:16; + u8 zero2; + u16 next; + u16 length; +} __packed; + +/* capabilities */ + +struct tb_cap_link_controller { + struct tb_cap_extended_long cap_header; + u32 count:4; /* number of link controllers */ + u32 unknown1:4; + u32 base_offset:8; /* + * offset (into this capability) of the configuration + * area of the first link controller + */ + u32 length:12; /* link controller configuration area length */ + u32 unknown2:4; /* TODO check that length is correct */ +} __packed; + +struct tb_cap_phy { + struct tb_cap_basic cap_header; + u32 unknown1:16; + u32 unknown2:14; + bool disable:1; + u32 unknown3:11; + enum tb_port_state state:4; + u32 unknown4:2; +} __packed; + +struct tb_eeprom_ctl { + bool clock:1; /* send pulse to transfer one bit */ + bool access_low:1; /* set to 0 before access */ + bool data_out:1; /* to eeprom */ + bool data_in:1; /* from eeprom */ + bool access_high:1; /* set to 1 before access */ + bool not_present:1; /* should be 0 */ + bool unknown1:1; + bool present:1; /* should be 1 */ + u32 unknown2:24; +} __packed; + +struct tb_cap_plug_events { + struct tb_cap_extended_short cap_header; + u32 __unknown1:2; + u32 plug_events:5; + u32 __unknown2:25; + u32 __unknown3; + u32 __unknown4; + struct tb_eeprom_ctl eeprom_ctl; + u32 __unknown5[7]; + u32 drom_offset; /* 32 bit register, but eeprom addresses are 16 bit */ +} __packed; + +/* device headers */ + +/* Present on port 0 in TB_CFG_SWITCH at address zero. */ +struct tb_regs_switch_header { + /* DWORD 0 */ + u16 vendor_id; + u16 device_id; + /* DWORD 1 */ + u32 first_cap_offset:8; + u32 upstream_port_number:6; + u32 max_port_number:6; + u32 depth:3; + u32 __unknown1:1; + u32 revision:8; + /* DWORD 2 */ + u32 route_lo; + /* DWORD 3 */ + u32 route_hi:31; + bool enabled:1; + /* DWORD 4 */ + u32 plug_events_delay:8; /* + * RW, pause between plug events in + * milliseconds. Writing 0x00 is interpreted + * as 255ms. + */ + u32 __unknown4:16; + u32 thunderbolt_version:8; +} __packed; + +enum tb_port_type { + TB_TYPE_INACTIVE = 0x000000, + TB_TYPE_PORT = 0x000001, + TB_TYPE_NHI = 0x000002, + /* TB_TYPE_ETHERNET = 0x020000, lower order bits are not known */ + /* TB_TYPE_SATA = 0x080000, lower order bits are not known */ + TB_TYPE_DP_HDMI_IN = 0x0e0101, + TB_TYPE_DP_HDMI_OUT = 0x0e0102, + TB_TYPE_PCIE_DOWN = 0x100101, + TB_TYPE_PCIE_UP = 0x100102, + /* TB_TYPE_USB = 0x200000, lower order bits are not known */ +}; + +/* Present on every port in TB_CF_PORT at address zero. */ +struct tb_regs_port_header { + /* DWORD 0 */ + u16 vendor_id; + u16 device_id; + /* DWORD 1 */ + u32 first_cap_offset:8; + u32 max_counters:11; + u32 __unknown1:5; + u32 revision:8; + /* DWORD 2 */ + enum tb_port_type type:24; + u32 thunderbolt_version:8; + /* DWORD 3 */ + u32 __unknown2:20; + u32 port_number:6; + u32 __unknown3:6; + /* DWORD 4 */ + u32 nfc_credits; + /* DWORD 5 */ + u32 max_in_hop_id:11; + u32 max_out_hop_id:11; + u32 __unkown4:10; + /* DWORD 6 */ + u32 __unknown5; + /* DWORD 7 */ + u32 __unknown6; + +} __packed; + +/* Hop register from TB_CFG_HOPS. 8 byte per entry. */ +struct tb_regs_hop { + /* DWORD 0 */ + u32 next_hop:11; /* + * hop to take after sending the packet through + * out_port (on the incoming port of the next switch) + */ + u32 out_port:6; /* next port of the path (on the same switch) */ + u32 initial_credits:8; + u32 unknown1:6; /* set to zero */ + bool enable:1; + + /* DWORD 1 */ + u32 weight:4; + u32 unknown2:4; /* set to zero */ + u32 priority:3; + bool drop_packages:1; + u32 counter:11; /* index into TB_CFG_COUNTERS on this port */ + bool counter_enable:1; + bool ingress_fc:1; + bool egress_fc:1; + bool ingress_shared_buffer:1; + bool egress_shared_buffer:1; + u32 unknown3:4; /* set to zero */ +} __packed; + + +#endif