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0bf2461fdd
Fix switch initialization to ensure that all switches have default routing disabled. This guarantees that no unexpected RapidIO packets arrive to the default port set by reset and there is no default routing destination until it is properly configured by software. This update also unifies handling of unmapped destinations by tsi57x, IDT Gen1 and IDT Gen2 switches. Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com> Cc: Kumar Gala <galak@kernel.crashing.org> Cc: Matt Porter <mporter@kernel.crashing.org> Cc: Li Yang <leoli@freescale.com> Cc: Thomas Moll <thomas.moll@sysgo.com> Cc: <stable@kernel.org> [2.6.37+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
150 lines
4.0 KiB
C
150 lines
4.0 KiB
C
/*
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* IDT CPS RapidIO switches support
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*
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* Copyright 2009-2010 Integrated Device Technology, Inc.
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* Alexandre Bounine <alexandre.bounine@idt.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/rio.h>
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#include <linux/rio_drv.h>
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#include <linux/rio_ids.h>
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#include "../rio.h"
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#define CPS_DEFAULT_ROUTE 0xde
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#define CPS_NO_ROUTE 0xdf
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#define IDTCPS_RIO_DOMAIN 0xf20020
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static int
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idtcps_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount,
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u16 table, u16 route_destid, u8 route_port)
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{
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u32 result;
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if (route_port == RIO_INVALID_ROUTE)
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route_port = CPS_DEFAULT_ROUTE;
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if (table == RIO_GLOBAL_TABLE) {
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rio_mport_write_config_32(mport, destid, hopcount,
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RIO_STD_RTE_CONF_DESTID_SEL_CSR, route_destid);
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rio_mport_read_config_32(mport, destid, hopcount,
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RIO_STD_RTE_CONF_PORT_SEL_CSR, &result);
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result = (0xffffff00 & result) | (u32)route_port;
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rio_mport_write_config_32(mport, destid, hopcount,
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RIO_STD_RTE_CONF_PORT_SEL_CSR, result);
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}
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return 0;
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}
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static int
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idtcps_route_get_entry(struct rio_mport *mport, u16 destid, u8 hopcount,
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u16 table, u16 route_destid, u8 *route_port)
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{
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u32 result;
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if (table == RIO_GLOBAL_TABLE) {
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rio_mport_write_config_32(mport, destid, hopcount,
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RIO_STD_RTE_CONF_DESTID_SEL_CSR, route_destid);
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rio_mport_read_config_32(mport, destid, hopcount,
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RIO_STD_RTE_CONF_PORT_SEL_CSR, &result);
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if (CPS_DEFAULT_ROUTE == (u8)result ||
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CPS_NO_ROUTE == (u8)result)
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*route_port = RIO_INVALID_ROUTE;
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else
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*route_port = (u8)result;
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}
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return 0;
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}
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static int
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idtcps_route_clr_table(struct rio_mport *mport, u16 destid, u8 hopcount,
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u16 table)
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{
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u32 i;
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if (table == RIO_GLOBAL_TABLE) {
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for (i = 0x80000000; i <= 0x800000ff;) {
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rio_mport_write_config_32(mport, destid, hopcount,
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RIO_STD_RTE_CONF_DESTID_SEL_CSR, i);
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rio_mport_write_config_32(mport, destid, hopcount,
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RIO_STD_RTE_CONF_PORT_SEL_CSR,
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(CPS_DEFAULT_ROUTE << 24) |
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(CPS_DEFAULT_ROUTE << 16) |
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(CPS_DEFAULT_ROUTE << 8) | CPS_DEFAULT_ROUTE);
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i += 4;
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}
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}
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return 0;
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}
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static int
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idtcps_set_domain(struct rio_mport *mport, u16 destid, u8 hopcount,
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u8 sw_domain)
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{
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/*
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* Switch domain configuration operates only at global level
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*/
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rio_mport_write_config_32(mport, destid, hopcount,
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IDTCPS_RIO_DOMAIN, (u32)sw_domain);
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return 0;
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}
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static int
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idtcps_get_domain(struct rio_mport *mport, u16 destid, u8 hopcount,
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u8 *sw_domain)
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{
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u32 regval;
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/*
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* Switch domain configuration operates only at global level
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*/
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rio_mport_read_config_32(mport, destid, hopcount,
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IDTCPS_RIO_DOMAIN, ®val);
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*sw_domain = (u8)(regval & 0xff);
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return 0;
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}
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static int idtcps_switch_init(struct rio_dev *rdev, int do_enum)
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{
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pr_debug("RIO: %s for %s\n", __func__, rio_name(rdev));
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rdev->rswitch->add_entry = idtcps_route_add_entry;
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rdev->rswitch->get_entry = idtcps_route_get_entry;
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rdev->rswitch->clr_table = idtcps_route_clr_table;
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rdev->rswitch->set_domain = idtcps_set_domain;
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rdev->rswitch->get_domain = idtcps_get_domain;
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rdev->rswitch->em_init = NULL;
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rdev->rswitch->em_handle = NULL;
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if (do_enum) {
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/* set TVAL = ~50us */
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rio_write_config_32(rdev,
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rdev->phys_efptr + RIO_PORT_LINKTO_CTL_CSR, 0x8e << 8);
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/* Ensure that default routing is disabled on startup */
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rio_write_config_32(rdev,
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RIO_STD_RTE_DEFAULT_PORT, CPS_NO_ROUTE);
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}
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return 0;
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}
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DECLARE_RIO_SWITCH_INIT(RIO_VID_IDT, RIO_DID_IDTCPS6Q, idtcps_switch_init);
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DECLARE_RIO_SWITCH_INIT(RIO_VID_IDT, RIO_DID_IDTCPS8, idtcps_switch_init);
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DECLARE_RIO_SWITCH_INIT(RIO_VID_IDT, RIO_DID_IDTCPS10Q, idtcps_switch_init);
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DECLARE_RIO_SWITCH_INIT(RIO_VID_IDT, RIO_DID_IDTCPS12, idtcps_switch_init);
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DECLARE_RIO_SWITCH_INIT(RIO_VID_IDT, RIO_DID_IDTCPS16, idtcps_switch_init);
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DECLARE_RIO_SWITCH_INIT(RIO_VID_IDT, RIO_DID_IDT70K200, idtcps_switch_init);
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