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![Alexandre Bounine](/assets/img/avatar_default.png)
Rework RapidIO switch drivers to add an option to build them as loadable kernel modules. This patch removes RapidIO-specific vmlinux section and converts switch drivers to be compatible with LDM driver registration method. To simplify registration of device-specific callback routines this patch introduces rio_switch_ops data structure. The sw_sysfs() callback is removed from the list of device-specific operations because under the new structure its functions can be handled by switch driver's probe() and remove() routines. If a specific switch device driver is not loaded the RapidIO subsystem core will use default standard-based operations to configure a switch. Because the current implementation of RapidIO enumeration/discovery method relies on availability of device-specific operations for error management, switch device drivers must be loaded before the RapidIO enumeration/discovery starts. This patch also moves several common routines from enumeration/discovery module into the RapidIO core code to make switch-specific operations accessible to all components of RapidIO subsystem. Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com> Cc: Matt Porter <mporter@kernel.crashing.org> Cc: Li Yang <leoli@freescale.com> Cc: Kumar Gala <galak@kernel.crashing.org> Cc: Andre van Herk <andre.van.herk@Prodrive.nl> Cc: Micha Nelissen <micha.nelissen@Prodrive.nl> Cc: Stef van Os <stef.van.os@Prodrive.nl> Cc: Jean Delvare <jdelvare@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
371 lines
9.8 KiB
C
371 lines
9.8 KiB
C
/*
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* RapidIO Tsi57x switch family 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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* - Added EM support
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* - Modified switch operations initialization.
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*
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* Copyright 2005 MontaVista Software, Inc.
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* Matt Porter <mporter@kernel.crashing.org>
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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 <linux/delay.h>
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#include <linux/module.h>
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#include "../rio.h"
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/* Global (broadcast) route registers */
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#define SPBC_ROUTE_CFG_DESTID 0x10070
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#define SPBC_ROUTE_CFG_PORT 0x10074
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/* Per port route registers */
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#define SPP_ROUTE_CFG_DESTID(n) (0x11070 + 0x100*n)
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#define SPP_ROUTE_CFG_PORT(n) (0x11074 + 0x100*n)
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#define TSI578_SP_MODE(n) (0x11004 + n*0x100)
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#define TSI578_SP_MODE_GLBL 0x10004
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#define TSI578_SP_MODE_PW_DIS 0x08000000
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#define TSI578_SP_MODE_LUT_512 0x01000000
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#define TSI578_SP_CTL_INDEP(n) (0x13004 + n*0x100)
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#define TSI578_SP_LUT_PEINF(n) (0x13010 + n*0x100)
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#define TSI578_SP_CS_TX(n) (0x13014 + n*0x100)
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#define TSI578_SP_INT_STATUS(n) (0x13018 + n*0x100)
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#define TSI578_GLBL_ROUTE_BASE 0x10078
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static int
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tsi57x_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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if (table == RIO_GLOBAL_TABLE) {
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rio_mport_write_config_32(mport, destid, hopcount,
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SPBC_ROUTE_CFG_DESTID, route_destid);
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rio_mport_write_config_32(mport, destid, hopcount,
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SPBC_ROUTE_CFG_PORT, route_port);
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} else {
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rio_mport_write_config_32(mport, destid, hopcount,
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SPP_ROUTE_CFG_DESTID(table), route_destid);
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rio_mport_write_config_32(mport, destid, hopcount,
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SPP_ROUTE_CFG_PORT(table), route_port);
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}
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udelay(10);
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return 0;
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}
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static int
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tsi57x_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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int ret = 0;
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u32 result;
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if (table == RIO_GLOBAL_TABLE) {
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/* Use local RT of the ingress port to avoid possible
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race condition */
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rio_mport_read_config_32(mport, destid, hopcount,
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RIO_SWP_INFO_CAR, &result);
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table = (result & RIO_SWP_INFO_PORT_NUM_MASK);
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}
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rio_mport_write_config_32(mport, destid, hopcount,
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SPP_ROUTE_CFG_DESTID(table), route_destid);
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rio_mport_read_config_32(mport, destid, hopcount,
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SPP_ROUTE_CFG_PORT(table), &result);
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*route_port = (u8)result;
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if (*route_port > 15)
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ret = -1;
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return ret;
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}
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static int
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tsi57x_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 route_idx;
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u32 lut_size;
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lut_size = (mport->sys_size) ? 0x1ff : 0xff;
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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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SPBC_ROUTE_CFG_DESTID, 0x80000000);
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for (route_idx = 0; route_idx <= lut_size; route_idx++)
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rio_mport_write_config_32(mport, destid, hopcount,
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SPBC_ROUTE_CFG_PORT,
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RIO_INVALID_ROUTE);
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} else {
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rio_mport_write_config_32(mport, destid, hopcount,
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SPP_ROUTE_CFG_DESTID(table), 0x80000000);
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for (route_idx = 0; route_idx <= lut_size; route_idx++)
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rio_mport_write_config_32(mport, destid, hopcount,
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SPP_ROUTE_CFG_PORT(table) , RIO_INVALID_ROUTE);
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}
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return 0;
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}
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static int
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tsi57x_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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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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/* Turn off flat (LUT_512) mode */
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rio_mport_read_config_32(mport, destid, hopcount,
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TSI578_SP_MODE_GLBL, ®val);
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rio_mport_write_config_32(mport, destid, hopcount, TSI578_SP_MODE_GLBL,
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regval & ~TSI578_SP_MODE_LUT_512);
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/* Set switch domain base */
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rio_mport_write_config_32(mport, destid, hopcount,
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TSI578_GLBL_ROUTE_BASE,
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(u32)(sw_domain << 24));
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return 0;
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}
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static int
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tsi57x_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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TSI578_GLBL_ROUTE_BASE, ®val);
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*sw_domain = (u8)(regval >> 24);
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return 0;
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}
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static int
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tsi57x_em_init(struct rio_dev *rdev)
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{
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u32 regval;
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int portnum;
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pr_debug("TSI578 %s [%d:%d]\n", __func__, rdev->destid, rdev->hopcount);
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for (portnum = 0;
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portnum < RIO_GET_TOTAL_PORTS(rdev->swpinfo); portnum++) {
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/* Make sure that Port-Writes are enabled (for all ports) */
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rio_read_config_32(rdev,
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TSI578_SP_MODE(portnum), ®val);
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rio_write_config_32(rdev,
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TSI578_SP_MODE(portnum),
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regval & ~TSI578_SP_MODE_PW_DIS);
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/* Clear all pending interrupts */
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rio_read_config_32(rdev,
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rdev->phys_efptr +
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RIO_PORT_N_ERR_STS_CSR(portnum),
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®val);
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rio_write_config_32(rdev,
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rdev->phys_efptr +
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RIO_PORT_N_ERR_STS_CSR(portnum),
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regval & 0x07120214);
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rio_read_config_32(rdev,
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TSI578_SP_INT_STATUS(portnum), ®val);
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rio_write_config_32(rdev,
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TSI578_SP_INT_STATUS(portnum),
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regval & 0x000700bd);
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/* Enable all interrupts to allow ports to send a port-write */
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rio_read_config_32(rdev,
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TSI578_SP_CTL_INDEP(portnum), ®val);
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rio_write_config_32(rdev,
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TSI578_SP_CTL_INDEP(portnum),
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regval | 0x000b0000);
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/* Skip next (odd) port if the current port is in x4 mode */
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rio_read_config_32(rdev,
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rdev->phys_efptr + RIO_PORT_N_CTL_CSR(portnum),
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®val);
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if ((regval & RIO_PORT_N_CTL_PWIDTH) == RIO_PORT_N_CTL_PWIDTH_4)
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portnum++;
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}
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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, 0x9a << 8);
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return 0;
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}
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static int
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tsi57x_em_handler(struct rio_dev *rdev, u8 portnum)
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{
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struct rio_mport *mport = rdev->net->hport;
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u32 intstat, err_status;
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int sendcount, checkcount;
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u8 route_port;
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u32 regval;
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rio_read_config_32(rdev,
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rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum),
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&err_status);
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if ((err_status & RIO_PORT_N_ERR_STS_PORT_OK) &&
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(err_status & (RIO_PORT_N_ERR_STS_PW_OUT_ES |
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RIO_PORT_N_ERR_STS_PW_INP_ES))) {
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/* Remove any queued packets by locking/unlocking port */
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rio_read_config_32(rdev,
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rdev->phys_efptr + RIO_PORT_N_CTL_CSR(portnum),
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®val);
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if (!(regval & RIO_PORT_N_CTL_LOCKOUT)) {
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rio_write_config_32(rdev,
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rdev->phys_efptr + RIO_PORT_N_CTL_CSR(portnum),
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regval | RIO_PORT_N_CTL_LOCKOUT);
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udelay(50);
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rio_write_config_32(rdev,
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rdev->phys_efptr + RIO_PORT_N_CTL_CSR(portnum),
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regval);
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}
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/* Read from link maintenance response register to clear
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* valid bit
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*/
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rio_read_config_32(rdev,
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rdev->phys_efptr + RIO_PORT_N_MNT_RSP_CSR(portnum),
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®val);
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/* Send a Packet-Not-Accepted/Link-Request-Input-Status control
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* symbol to recover from IES/OES
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*/
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sendcount = 3;
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while (sendcount) {
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rio_write_config_32(rdev,
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TSI578_SP_CS_TX(portnum), 0x40fc8000);
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checkcount = 3;
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while (checkcount--) {
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udelay(50);
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rio_read_config_32(rdev,
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rdev->phys_efptr +
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RIO_PORT_N_MNT_RSP_CSR(portnum),
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®val);
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if (regval & RIO_PORT_N_MNT_RSP_RVAL)
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goto exit_es;
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}
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sendcount--;
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}
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}
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exit_es:
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/* Clear implementation specific error status bits */
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rio_read_config_32(rdev, TSI578_SP_INT_STATUS(portnum), &intstat);
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pr_debug("TSI578[%x:%x] SP%d_INT_STATUS=0x%08x\n",
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rdev->destid, rdev->hopcount, portnum, intstat);
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if (intstat & 0x10000) {
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rio_read_config_32(rdev,
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TSI578_SP_LUT_PEINF(portnum), ®val);
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regval = (mport->sys_size) ? (regval >> 16) : (regval >> 24);
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route_port = rdev->rswitch->route_table[regval];
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pr_debug("RIO: TSI578[%s] P%d LUT Parity Error (destID=%d)\n",
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rio_name(rdev), portnum, regval);
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tsi57x_route_add_entry(mport, rdev->destid, rdev->hopcount,
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RIO_GLOBAL_TABLE, regval, route_port);
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}
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rio_write_config_32(rdev, TSI578_SP_INT_STATUS(portnum),
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intstat & 0x000700bd);
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return 0;
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}
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static struct rio_switch_ops tsi57x_switch_ops = {
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.owner = THIS_MODULE,
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.add_entry = tsi57x_route_add_entry,
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.get_entry = tsi57x_route_get_entry,
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.clr_table = tsi57x_route_clr_table,
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.set_domain = tsi57x_set_domain,
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.get_domain = tsi57x_get_domain,
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.em_init = tsi57x_em_init,
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.em_handle = tsi57x_em_handler,
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};
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static int tsi57x_probe(struct rio_dev *rdev, const struct rio_device_id *id)
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{
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pr_debug("RIO: %s for %s\n", __func__, rio_name(rdev));
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spin_lock(&rdev->rswitch->lock);
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if (rdev->rswitch->ops) {
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spin_unlock(&rdev->rswitch->lock);
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return -EINVAL;
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}
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rdev->rswitch->ops = &tsi57x_switch_ops;
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if (rdev->do_enum) {
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/* Ensure that default routing is disabled on startup */
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rio_write_config_32(rdev, RIO_STD_RTE_DEFAULT_PORT,
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RIO_INVALID_ROUTE);
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}
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spin_unlock(&rdev->rswitch->lock);
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return 0;
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}
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static void tsi57x_remove(struct rio_dev *rdev)
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{
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pr_debug("RIO: %s for %s\n", __func__, rio_name(rdev));
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spin_lock(&rdev->rswitch->lock);
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if (rdev->rswitch->ops != &tsi57x_switch_ops) {
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spin_unlock(&rdev->rswitch->lock);
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return;
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}
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rdev->rswitch->ops = NULL;
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spin_unlock(&rdev->rswitch->lock);
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}
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static struct rio_device_id tsi57x_id_table[] = {
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{RIO_DEVICE(RIO_DID_TSI572, RIO_VID_TUNDRA)},
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{RIO_DEVICE(RIO_DID_TSI574, RIO_VID_TUNDRA)},
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{RIO_DEVICE(RIO_DID_TSI577, RIO_VID_TUNDRA)},
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{RIO_DEVICE(RIO_DID_TSI578, RIO_VID_TUNDRA)},
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{ 0, } /* terminate list */
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};
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static struct rio_driver tsi57x_driver = {
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.name = "tsi57x",
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.id_table = tsi57x_id_table,
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.probe = tsi57x_probe,
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.remove = tsi57x_remove,
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};
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static int __init tsi57x_init(void)
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{
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return rio_register_driver(&tsi57x_driver);
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}
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static void __exit tsi57x_exit(void)
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{
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rio_unregister_driver(&tsi57x_driver);
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}
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device_initcall(tsi57x_init);
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module_exit(tsi57x_exit);
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MODULE_DESCRIPTION("IDT Tsi57x Serial RapidIO switch family driver");
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MODULE_AUTHOR("Integrated Device Technology, Inc.");
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MODULE_LICENSE("GPL");
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