Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756812Ab0BXPfJ (ORCPT ); Wed, 24 Feb 2010 10:35:09 -0500 Received: from mail2.tundra.com ([142.46.200.162]:44243 "EHLO mx2.tundra.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1755862Ab0BXPey (ORCPT ); Wed, 24 Feb 2010 10:34:54 -0500 X-ASG-Debug-ID: 1267025689-01c3006e0000-xx1T2L X-Barracuda-URL: http://142.46.200.162:8000/cgi-bin/mark.cgi X-Barracuda-Envelope-From: alexb@tundra.com Date: Wed, 24 Feb 2010 10:34:43 -0500 From: Alexandre Bounine To: mporter@kernel.crashing.org Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, thomas.moll@sysgo.com, thomas.moll.ext@nsn.com, abounine@idt.com X-ASG-Orig-Subj: [PATCH 6/7] RapidIO: Add RX/TX enable for SRIO port Subject: [PATCH 6/7] RapidIO: Add RX/TX enable for SRIO port Message-ID: <20100224153443.GF13661@kaneng01.tundra.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.4.1i X-Barracuda-Connect: UNKNOWN[142.46.200.189] X-Barracuda-Start-Time: 1267025690 X-Barracuda-Virus-Scanned: by Barracuda Spam & Virus Firewall at tundra.com Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6804 Lines: 177 From: Thomas Moll Add the functionality to enable Input receiver and Output transmitter of every port, to allow non-maintenance traffic. Signed-off-by: Thomas Moll --- drivers/rapidio/Kconfig | 11 ++++++ drivers/rapidio/rio-scan.c | 79 ++++++++++++++++++++++++++++++++++++++++++++- include/linux/rio_regs.h | 5 ++ 3 files changed, 94 insertions(+), 1 deletion(-) diff -purN linux-base/drivers/rapidio/Kconfig linux-new/drivers/rapidio/Kconfig --- linux-base/drivers/rapidio/Kconfig 2010-02-22 10:44:47.000000000 +0100 +++ linux-new/drivers/rapidio/Kconfig 2010-02-22 12:36:20.000000000 +0100 @@ -8,3 +8,14 @@ config RAPIDIO_DISC_TIMEOUT ---help--- Amount of time a discovery node waits for a host to complete enumeration before giving up. + +config RAPIDIO_ENABLE_RX_TX_PORTS + bool "Enable RapidIO Input/Output Ports" + depends on RAPIDIO + ---help--- + The RapidIO specification describes a Output port transmit + enable and a Input port receive enable. The recommended state + for Input ports and Output ports should be disabled. When + this switch is set the RapidIO subsystem will enable all + ports for Input/Output direction to allow other traffic + than Maintenance transfers. diff -purN linux-base/drivers/rapidio/rio-scan.c linux-new/drivers/rapidio/rio-scan.c --- linux-base/drivers/rapidio/rio-scan.c 2010-02-22 10:48:15.000000000 +0100 +++ linux-new/drivers/rapidio/rio-scan.c 2010-02-22 13:42:08.000000000 +0100 @@ -8,6 +8,10 @@ * Alex Bounine * - Added Port-Write/Error Management initialization and handling * + * Copyright 2009 Sysgo AG + * Thomas Moll + * - Added Input- Output- enable functionality, to allow full communication + * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your @@ -328,6 +332,65 @@ static int __devinit rio_add_device(stru } /** + * rio_enable_rx_tx_port - enable input reciever and output transmitter of + * given port + * @port: Master port associated with the RIO network + * @local: local=1 select local port otherwise a far device is reached + * @destid: Destination ID of the device to check host bit + * @hopcount: Number of hops to reach the target + * @port_num: Port (-number on switch) to enable on a far end device + * + * Returns 0 or 1 from on General Control Command and Status Register + * (EXT_PTR+0x3C) + */ +inline int rio_enable_rx_tx_port(struct rio_mport *port, + int local, u16 destid, + u8 hopcount, u8 port_num) { +#ifdef CONFIG_RAPIDIO_ENABLE_RX_TX_PORTS + u32 regval; + u32 ext_ftr_ptr; + + /* + * enable rx input tx output port + */ + pr_debug("rio_enable_rx_tx_port(local = %d, destid = %d, hopcount = " + "%d, port_num = %d)\n", local, destid, hopcount, port_num); + + ext_ftr_ptr = rio_mport_get_physefb(port, local, destid, hopcount); + + if (local) { + rio_local_read_config_32(port, ext_ftr_ptr + + RIO_PORT_N_CTL_CSR(0), + ®val); + } else { + if (rio_mport_read_config_32(port, destid, hopcount, + ext_ftr_ptr + RIO_PORT_N_CTL_CSR(port_num), ®val) < 0) + return -EIO; + } + + if (regval & RIO_PORT_N_CTL_P_TYP_SER) { + /* serial */ + regval = regval | RIO_PORT_N_CTL_EN_RX_SER + | RIO_PORT_N_CTL_EN_TX_SER; + } else { + /* parallel */ + regval = regval | RIO_PORT_N_CTL_EN_RX_PAR + | RIO_PORT_N_CTL_EN_TX_PAR; + } + + if (local) { + rio_local_write_config_32(port, ext_ftr_ptr + + RIO_PORT_N_CTL_CSR(0), regval); + } else { + if (rio_mport_write_config_32(port, destid, hopcount, + ext_ftr_ptr + RIO_PORT_N_CTL_CSR(port_num), regval) < 0) + return -EIO; + } +#endif + return 0; +} + +/** * rio_setup_device- Allocates and sets up a RIO device * @net: RIO network * @port: Master port to send transactions @@ -430,9 +493,14 @@ static struct rio_dev __devinit *rio_set list_add_tail(&rswitch->node, &rio_switches); - } else + } else { + if (do_enum) + /*Enable Input Output Port (transmitter reviever)*/ + rio_enable_rx_tx_port(port, 0, destid, hopcount, 0); + dev_set_name(&rdev->dev, "%02x:e:%04x", rdev->net->id, rdev->destid); + } rdev->dev.bus = &rio_bus_type; @@ -740,6 +808,11 @@ static int __devinit rio_enum_peer(struc rio_name(rdev), rdev->vid, rdev->did, num_ports); sw_destid = next_destid; for (port_num = 0; port_num < num_ports; port_num++) { + /*Enable Input Output Port (transmitter reviever)*/ + rio_enable_rx_tx_port(port, 0, + RIO_ANY_DESTID(port->sys_size), + hopcount, port_num); + if (sw_inport == port_num) { rdev->rswitch->port_ok |= (1 << port_num); continue; @@ -1085,6 +1158,10 @@ int __devinit rio_enum_mport(struct rio_ rc = -ENOMEM; goto out; } + + /* Enable Input Output Port (transmitter reviever) */ + rio_enable_rx_tx_port(mport, 1, 0, 0, 0); + if (rio_enum_peer(net, mport, 0) < 0) { /* A higher priority host won enumeration, bail. */ printk(KERN_INFO diff -purN linux-base/include/linux/rio_regs.h linux-new/include/linux/rio_regs.h --- linux-base/include/linux/rio_regs.h 2010-02-22 10:48:15.000000000 +0100 +++ linux-new/include/linux/rio_regs.h 2010-02-22 12:38:57.000000000 +0100 @@ -242,7 +242,12 @@ #define RIO_PORT_N_CTL_PWIDTH 0xc0000000 #define RIO_PORT_N_CTL_PWIDTH_1 0x00000000 #define RIO_PORT_N_CTL_PWIDTH_4 0x40000000 +#define RIO_PORT_N_CTL_P_TYP_SER 0x00000001 #define RIO_PORT_N_CTL_LOCKOUT 0x00000002 +#define RIO_PORT_N_CTL_EN_RX_SER 0x00200000 +#define RIO_PORT_N_CTL_EN_TX_SER 0x00400000 +#define RIO_PORT_N_CTL_EN_RX_PAR 0x08000000 +#define RIO_PORT_N_CTL_EN_TX_PAR 0x40000000 /* * Error Management Extensions (RapidIO 1.3+, Part 8) --- Important Notice: This message is intended for the use of the individual to whom it is addressed and may contain information which is privileged, confidential and/or exempt from disclosure under applicable law. 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