![Alexandre Bounine](/assets/img/avatar_default.png)
Add switch specific domain routines required for 16-bit routing support in switches with hierarchical implementation of routing tables. 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: Thomas Moll <thomas.moll@sysgo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
316 lines
9.2 KiB
C
316 lines
9.2 KiB
C
/*
|
|
* RapidIO Tsi57x switch family support
|
|
*
|
|
* Copyright 2009-2010 Integrated Device Technology, Inc.
|
|
* Alexandre Bounine <alexandre.bounine@idt.com>
|
|
* - Added EM support
|
|
* - Modified switch operations initialization.
|
|
*
|
|
* Copyright 2005 MontaVista Software, Inc.
|
|
* Matt Porter <mporter@kernel.crashing.org>
|
|
*
|
|
* 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
|
|
* option) any later version.
|
|
*/
|
|
|
|
#include <linux/rio.h>
|
|
#include <linux/rio_drv.h>
|
|
#include <linux/rio_ids.h>
|
|
#include <linux/delay.h>
|
|
#include "../rio.h"
|
|
|
|
/* Global (broadcast) route registers */
|
|
#define SPBC_ROUTE_CFG_DESTID 0x10070
|
|
#define SPBC_ROUTE_CFG_PORT 0x10074
|
|
|
|
/* Per port route registers */
|
|
#define SPP_ROUTE_CFG_DESTID(n) (0x11070 + 0x100*n)
|
|
#define SPP_ROUTE_CFG_PORT(n) (0x11074 + 0x100*n)
|
|
|
|
#define TSI578_SP_MODE(n) (0x11004 + n*0x100)
|
|
#define TSI578_SP_MODE_GLBL 0x10004
|
|
#define TSI578_SP_MODE_PW_DIS 0x08000000
|
|
#define TSI578_SP_MODE_LUT_512 0x01000000
|
|
|
|
#define TSI578_SP_CTL_INDEP(n) (0x13004 + n*0x100)
|
|
#define TSI578_SP_LUT_PEINF(n) (0x13010 + n*0x100)
|
|
#define TSI578_SP_CS_TX(n) (0x13014 + n*0x100)
|
|
#define TSI578_SP_INT_STATUS(n) (0x13018 + n*0x100)
|
|
|
|
#define TSI578_GLBL_ROUTE_BASE 0x10078
|
|
|
|
static int
|
|
tsi57x_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount,
|
|
u16 table, u16 route_destid, u8 route_port)
|
|
{
|
|
if (table == RIO_GLOBAL_TABLE) {
|
|
rio_mport_write_config_32(mport, destid, hopcount,
|
|
SPBC_ROUTE_CFG_DESTID, route_destid);
|
|
rio_mport_write_config_32(mport, destid, hopcount,
|
|
SPBC_ROUTE_CFG_PORT, route_port);
|
|
} else {
|
|
rio_mport_write_config_32(mport, destid, hopcount,
|
|
SPP_ROUTE_CFG_DESTID(table), route_destid);
|
|
rio_mport_write_config_32(mport, destid, hopcount,
|
|
SPP_ROUTE_CFG_PORT(table), route_port);
|
|
}
|
|
|
|
udelay(10);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
tsi57x_route_get_entry(struct rio_mport *mport, u16 destid, u8 hopcount,
|
|
u16 table, u16 route_destid, u8 *route_port)
|
|
{
|
|
int ret = 0;
|
|
u32 result;
|
|
|
|
if (table == RIO_GLOBAL_TABLE) {
|
|
/* Use local RT of the ingress port to avoid possible
|
|
race condition */
|
|
rio_mport_read_config_32(mport, destid, hopcount,
|
|
RIO_SWP_INFO_CAR, &result);
|
|
table = (result & RIO_SWP_INFO_PORT_NUM_MASK);
|
|
}
|
|
|
|
rio_mport_write_config_32(mport, destid, hopcount,
|
|
SPP_ROUTE_CFG_DESTID(table), route_destid);
|
|
rio_mport_read_config_32(mport, destid, hopcount,
|
|
SPP_ROUTE_CFG_PORT(table), &result);
|
|
|
|
*route_port = (u8)result;
|
|
if (*route_port > 15)
|
|
ret = -1;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
tsi57x_route_clr_table(struct rio_mport *mport, u16 destid, u8 hopcount,
|
|
u16 table)
|
|
{
|
|
u32 route_idx;
|
|
u32 lut_size;
|
|
|
|
lut_size = (mport->sys_size) ? 0x1ff : 0xff;
|
|
|
|
if (table == RIO_GLOBAL_TABLE) {
|
|
rio_mport_write_config_32(mport, destid, hopcount,
|
|
SPBC_ROUTE_CFG_DESTID, 0x80000000);
|
|
for (route_idx = 0; route_idx <= lut_size; route_idx++)
|
|
rio_mport_write_config_32(mport, destid, hopcount,
|
|
SPBC_ROUTE_CFG_PORT,
|
|
RIO_INVALID_ROUTE);
|
|
} else {
|
|
rio_mport_write_config_32(mport, destid, hopcount,
|
|
SPP_ROUTE_CFG_DESTID(table), 0x80000000);
|
|
for (route_idx = 0; route_idx <= lut_size; route_idx++)
|
|
rio_mport_write_config_32(mport, destid, hopcount,
|
|
SPP_ROUTE_CFG_PORT(table) , RIO_INVALID_ROUTE);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
tsi57x_set_domain(struct rio_mport *mport, u16 destid, u8 hopcount,
|
|
u8 sw_domain)
|
|
{
|
|
u32 regval;
|
|
|
|
/*
|
|
* Switch domain configuration operates only at global level
|
|
*/
|
|
|
|
/* Turn off flat (LUT_512) mode */
|
|
rio_mport_read_config_32(mport, destid, hopcount,
|
|
TSI578_SP_MODE_GLBL, ®val);
|
|
rio_mport_write_config_32(mport, destid, hopcount, TSI578_SP_MODE_GLBL,
|
|
regval & ~TSI578_SP_MODE_LUT_512);
|
|
/* Set switch domain base */
|
|
rio_mport_write_config_32(mport, destid, hopcount,
|
|
TSI578_GLBL_ROUTE_BASE,
|
|
(u32)(sw_domain << 24));
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
tsi57x_get_domain(struct rio_mport *mport, u16 destid, u8 hopcount,
|
|
u8 *sw_domain)
|
|
{
|
|
u32 regval;
|
|
|
|
/*
|
|
* Switch domain configuration operates only at global level
|
|
*/
|
|
rio_mport_read_config_32(mport, destid, hopcount,
|
|
TSI578_GLBL_ROUTE_BASE, ®val);
|
|
|
|
*sw_domain = (u8)(regval >> 24);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
tsi57x_em_init(struct rio_dev *rdev)
|
|
{
|
|
struct rio_mport *mport = rdev->net->hport;
|
|
u16 destid = rdev->rswitch->destid;
|
|
u8 hopcount = rdev->rswitch->hopcount;
|
|
u32 regval;
|
|
int portnum;
|
|
|
|
pr_debug("TSI578 %s [%d:%d]\n", __func__, destid, hopcount);
|
|
|
|
for (portnum = 0; portnum < 16; portnum++) {
|
|
/* Make sure that Port-Writes are enabled (for all ports) */
|
|
rio_mport_read_config_32(mport, destid, hopcount,
|
|
TSI578_SP_MODE(portnum), ®val);
|
|
rio_mport_write_config_32(mport, destid, hopcount,
|
|
TSI578_SP_MODE(portnum),
|
|
regval & ~TSI578_SP_MODE_PW_DIS);
|
|
|
|
/* Clear all pending interrupts */
|
|
rio_mport_read_config_32(mport, destid, hopcount,
|
|
rdev->phys_efptr +
|
|
RIO_PORT_N_ERR_STS_CSR(portnum),
|
|
®val);
|
|
rio_mport_write_config_32(mport, destid, hopcount,
|
|
rdev->phys_efptr +
|
|
RIO_PORT_N_ERR_STS_CSR(portnum),
|
|
regval & 0x07120214);
|
|
|
|
rio_mport_read_config_32(mport, destid, hopcount,
|
|
TSI578_SP_INT_STATUS(portnum), ®val);
|
|
rio_mport_write_config_32(mport, destid, hopcount,
|
|
TSI578_SP_INT_STATUS(portnum),
|
|
regval & 0x000700bd);
|
|
|
|
/* Enable all interrupts to allow ports to send a port-write */
|
|
rio_mport_read_config_32(mport, destid, hopcount,
|
|
TSI578_SP_CTL_INDEP(portnum), ®val);
|
|
rio_mport_write_config_32(mport, destid, hopcount,
|
|
TSI578_SP_CTL_INDEP(portnum),
|
|
regval | 0x000b0000);
|
|
|
|
/* Skip next (odd) port if the current port is in x4 mode */
|
|
rio_mport_read_config_32(mport, destid, hopcount,
|
|
rdev->phys_efptr + RIO_PORT_N_CTL_CSR(portnum),
|
|
®val);
|
|
if ((regval & RIO_PORT_N_CTL_PWIDTH) == RIO_PORT_N_CTL_PWIDTH_4)
|
|
portnum++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
tsi57x_em_handler(struct rio_dev *rdev, u8 portnum)
|
|
{
|
|
struct rio_mport *mport = rdev->net->hport;
|
|
u16 destid = rdev->rswitch->destid;
|
|
u8 hopcount = rdev->rswitch->hopcount;
|
|
u32 intstat, err_status;
|
|
int sendcount, checkcount;
|
|
u8 route_port;
|
|
u32 regval;
|
|
|
|
rio_mport_read_config_32(mport, destid, hopcount,
|
|
rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum),
|
|
&err_status);
|
|
|
|
if ((err_status & RIO_PORT_N_ERR_STS_PORT_OK) &&
|
|
(err_status & (RIO_PORT_N_ERR_STS_PW_OUT_ES |
|
|
RIO_PORT_N_ERR_STS_PW_INP_ES))) {
|
|
/* Remove any queued packets by locking/unlocking port */
|
|
rio_mport_read_config_32(mport, destid, hopcount,
|
|
rdev->phys_efptr + RIO_PORT_N_CTL_CSR(portnum),
|
|
®val);
|
|
if (!(regval & RIO_PORT_N_CTL_LOCKOUT)) {
|
|
rio_mport_write_config_32(mport, destid, hopcount,
|
|
rdev->phys_efptr + RIO_PORT_N_CTL_CSR(portnum),
|
|
regval | RIO_PORT_N_CTL_LOCKOUT);
|
|
udelay(50);
|
|
rio_mport_write_config_32(mport, destid, hopcount,
|
|
rdev->phys_efptr + RIO_PORT_N_CTL_CSR(portnum),
|
|
regval);
|
|
}
|
|
|
|
/* Read from link maintenance response register to clear
|
|
* valid bit
|
|
*/
|
|
rio_mport_read_config_32(mport, destid, hopcount,
|
|
rdev->phys_efptr + RIO_PORT_N_MNT_RSP_CSR(portnum),
|
|
®val);
|
|
|
|
/* Send a Packet-Not-Accepted/Link-Request-Input-Status control
|
|
* symbol to recover from IES/OES
|
|
*/
|
|
sendcount = 3;
|
|
while (sendcount) {
|
|
rio_mport_write_config_32(mport, destid, hopcount,
|
|
TSI578_SP_CS_TX(portnum), 0x40fc8000);
|
|
checkcount = 3;
|
|
while (checkcount--) {
|
|
udelay(50);
|
|
rio_mport_read_config_32(
|
|
mport, destid, hopcount,
|
|
rdev->phys_efptr +
|
|
RIO_PORT_N_MNT_RSP_CSR(portnum),
|
|
®val);
|
|
if (regval & RIO_PORT_N_MNT_RSP_RVAL)
|
|
goto exit_es;
|
|
}
|
|
|
|
sendcount--;
|
|
}
|
|
}
|
|
|
|
exit_es:
|
|
/* Clear implementation specific error status bits */
|
|
rio_mport_read_config_32(mport, destid, hopcount,
|
|
TSI578_SP_INT_STATUS(portnum), &intstat);
|
|
pr_debug("TSI578[%x:%x] SP%d_INT_STATUS=0x%08x\n",
|
|
destid, hopcount, portnum, intstat);
|
|
|
|
if (intstat & 0x10000) {
|
|
rio_mport_read_config_32(mport, destid, hopcount,
|
|
TSI578_SP_LUT_PEINF(portnum), ®val);
|
|
regval = (mport->sys_size) ? (regval >> 16) : (regval >> 24);
|
|
route_port = rdev->rswitch->route_table[regval];
|
|
pr_debug("RIO: TSI578[%s] P%d LUT Parity Error (destID=%d)\n",
|
|
rio_name(rdev), portnum, regval);
|
|
tsi57x_route_add_entry(mport, destid, hopcount,
|
|
RIO_GLOBAL_TABLE, regval, route_port);
|
|
}
|
|
|
|
rio_mport_write_config_32(mport, destid, hopcount,
|
|
TSI578_SP_INT_STATUS(portnum),
|
|
intstat & 0x000700bd);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tsi57x_switch_init(struct rio_dev *rdev, int do_enum)
|
|
{
|
|
pr_debug("RIO: %s for %s\n", __func__, rio_name(rdev));
|
|
rdev->rswitch->add_entry = tsi57x_route_add_entry;
|
|
rdev->rswitch->get_entry = tsi57x_route_get_entry;
|
|
rdev->rswitch->clr_table = tsi57x_route_clr_table;
|
|
rdev->rswitch->set_domain = tsi57x_set_domain;
|
|
rdev->rswitch->get_domain = tsi57x_get_domain;
|
|
rdev->rswitch->em_init = tsi57x_em_init;
|
|
rdev->rswitch->em_handle = tsi57x_em_handler;
|
|
|
|
return 0;
|
|
}
|
|
|
|
DECLARE_RIO_SWITCH_INIT(RIO_VID_TUNDRA, RIO_DID_TSI572, tsi57x_switch_init);
|
|
DECLARE_RIO_SWITCH_INIT(RIO_VID_TUNDRA, RIO_DID_TSI574, tsi57x_switch_init);
|
|
DECLARE_RIO_SWITCH_INIT(RIO_VID_TUNDRA, RIO_DID_TSI577, tsi57x_switch_init);
|
|
DECLARE_RIO_SWITCH_INIT(RIO_VID_TUNDRA, RIO_DID_TSI578, tsi57x_switch_init);
|