kernel_optimize_test/drivers/rapidio/switches/idtcps.c
Alexandre Bounine 2ec3ba69fa rapidio: convert switch drivers to modules
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>
2013-07-03 16:08:04 -07:00

204 lines
4.9 KiB
C

/*
* IDT CPS RapidIO switches support
*
* Copyright 2009-2010 Integrated Device Technology, Inc.
* Alexandre Bounine <alexandre.bounine@idt.com>
*
* 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/module.h>
#include "../rio.h"
#define CPS_DEFAULT_ROUTE 0xde
#define CPS_NO_ROUTE 0xdf
#define IDTCPS_RIO_DOMAIN 0xf20020
static int
idtcps_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount,
u16 table, u16 route_destid, u8 route_port)
{
u32 result;
if (route_port == RIO_INVALID_ROUTE)
route_port = CPS_DEFAULT_ROUTE;
if (table == RIO_GLOBAL_TABLE) {
rio_mport_write_config_32(mport, destid, hopcount,
RIO_STD_RTE_CONF_DESTID_SEL_CSR, route_destid);
rio_mport_read_config_32(mport, destid, hopcount,
RIO_STD_RTE_CONF_PORT_SEL_CSR, &result);
result = (0xffffff00 & result) | (u32)route_port;
rio_mport_write_config_32(mport, destid, hopcount,
RIO_STD_RTE_CONF_PORT_SEL_CSR, result);
}
return 0;
}
static int
idtcps_route_get_entry(struct rio_mport *mport, u16 destid, u8 hopcount,
u16 table, u16 route_destid, u8 *route_port)
{
u32 result;
if (table == RIO_GLOBAL_TABLE) {
rio_mport_write_config_32(mport, destid, hopcount,
RIO_STD_RTE_CONF_DESTID_SEL_CSR, route_destid);
rio_mport_read_config_32(mport, destid, hopcount,
RIO_STD_RTE_CONF_PORT_SEL_CSR, &result);
if (CPS_DEFAULT_ROUTE == (u8)result ||
CPS_NO_ROUTE == (u8)result)
*route_port = RIO_INVALID_ROUTE;
else
*route_port = (u8)result;
}
return 0;
}
static int
idtcps_route_clr_table(struct rio_mport *mport, u16 destid, u8 hopcount,
u16 table)
{
u32 i;
if (table == RIO_GLOBAL_TABLE) {
for (i = 0x80000000; i <= 0x800000ff;) {
rio_mport_write_config_32(mport, destid, hopcount,
RIO_STD_RTE_CONF_DESTID_SEL_CSR, i);
rio_mport_write_config_32(mport, destid, hopcount,
RIO_STD_RTE_CONF_PORT_SEL_CSR,
(CPS_DEFAULT_ROUTE << 24) |
(CPS_DEFAULT_ROUTE << 16) |
(CPS_DEFAULT_ROUTE << 8) | CPS_DEFAULT_ROUTE);
i += 4;
}
}
return 0;
}
static int
idtcps_set_domain(struct rio_mport *mport, u16 destid, u8 hopcount,
u8 sw_domain)
{
/*
* Switch domain configuration operates only at global level
*/
rio_mport_write_config_32(mport, destid, hopcount,
IDTCPS_RIO_DOMAIN, (u32)sw_domain);
return 0;
}
static int
idtcps_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,
IDTCPS_RIO_DOMAIN, &regval);
*sw_domain = (u8)(regval & 0xff);
return 0;
}
static struct rio_switch_ops idtcps_switch_ops = {
.owner = THIS_MODULE,
.add_entry = idtcps_route_add_entry,
.get_entry = idtcps_route_get_entry,
.clr_table = idtcps_route_clr_table,
.set_domain = idtcps_set_domain,
.get_domain = idtcps_get_domain,
.em_init = NULL,
.em_handle = NULL,
};
static int idtcps_probe(struct rio_dev *rdev, const struct rio_device_id *id)
{
pr_debug("RIO: %s for %s\n", __func__, rio_name(rdev));
spin_lock(&rdev->rswitch->lock);
if (rdev->rswitch->ops) {
spin_unlock(&rdev->rswitch->lock);
return -EINVAL;
}
rdev->rswitch->ops = &idtcps_switch_ops;
if (rdev->do_enum) {
/* set TVAL = ~50us */
rio_write_config_32(rdev,
rdev->phys_efptr + RIO_PORT_LINKTO_CTL_CSR, 0x8e << 8);
/* Ensure that default routing is disabled on startup */
rio_write_config_32(rdev,
RIO_STD_RTE_DEFAULT_PORT, CPS_NO_ROUTE);
}
spin_unlock(&rdev->rswitch->lock);
return 0;
}
static void idtcps_remove(struct rio_dev *rdev)
{
pr_debug("RIO: %s for %s\n", __func__, rio_name(rdev));
spin_lock(&rdev->rswitch->lock);
if (rdev->rswitch->ops != &idtcps_switch_ops) {
spin_unlock(&rdev->rswitch->lock);
return;
}
rdev->rswitch->ops = NULL;
spin_unlock(&rdev->rswitch->lock);
}
static struct rio_device_id idtcps_id_table[] = {
{RIO_DEVICE(RIO_DID_IDTCPS6Q, RIO_VID_IDT)},
{RIO_DEVICE(RIO_DID_IDTCPS8, RIO_VID_IDT)},
{RIO_DEVICE(RIO_DID_IDTCPS10Q, RIO_VID_IDT)},
{RIO_DEVICE(RIO_DID_IDTCPS12, RIO_VID_IDT)},
{RIO_DEVICE(RIO_DID_IDTCPS16, RIO_VID_IDT)},
{RIO_DEVICE(RIO_DID_IDT70K200, RIO_VID_IDT)},
{ 0, } /* terminate list */
};
static struct rio_driver idtcps_driver = {
.name = "idtcps",
.id_table = idtcps_id_table,
.probe = idtcps_probe,
.remove = idtcps_remove,
};
static int __init idtcps_init(void)
{
return rio_register_driver(&idtcps_driver);
}
static void __exit idtcps_exit(void)
{
rio_unregister_driver(&idtcps_driver);
}
device_initcall(idtcps_init);
module_exit(idtcps_exit);
MODULE_DESCRIPTION("IDT CPS Gen.1 Serial RapidIO switch family driver");
MODULE_AUTHOR("Integrated Device Technology, Inc.");
MODULE_LICENSE("GPL");