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linux/drivers/rapidio/rio-sysfs.c
Alexandre Bounine 388b78adc9 rapidio: modify configuration to support PCI-SRIO controller 
1. Add an option to include RapidIO support if the PCI is available.
2. Add FSL_RIO configuration option to enable controller selection.
3. Add RapidIO support option into x86 and MIPS architectures.

Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Acked-by: 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: Micha Nelissen <micha@neli.hopto.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-03-23 19:46:42 -07:00

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/*
* RapidIO sysfs attributes and support
*
* 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/kernel.h>
#include <linux/rio.h>
#include <linux/rio_drv.h>
#include <linux/stat.h>
#include <linux/capability.h>
#include "rio.h"
/* Sysfs support */
#define rio_config_attr(field, format_string) \
static ssize_t \
field##_show(struct device *dev, struct device_attribute *attr, char *buf) \
{ \
struct rio_dev *rdev = to_rio_dev(dev); \
\
return sprintf(buf, format_string, rdev->field); \
} \
rio_config_attr(did, "0x%04x\n");
rio_config_attr(vid, "0x%04x\n");
rio_config_attr(device_rev, "0x%08x\n");
rio_config_attr(asm_did, "0x%04x\n");
rio_config_attr(asm_vid, "0x%04x\n");
rio_config_attr(asm_rev, "0x%04x\n");
rio_config_attr(destid, "0x%04x\n");
rio_config_attr(hopcount, "0x%02x\n");
static ssize_t routes_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct rio_dev *rdev = to_rio_dev(dev);
char *str = buf;
int i;
for (i = 0; i < RIO_MAX_ROUTE_ENTRIES(rdev->net->hport->sys_size);
i++) {
if (rdev->rswitch->route_table[i] == RIO_INVALID_ROUTE)
continue;
str +=
sprintf(str, "%04x %02x\n", i,
rdev->rswitch->route_table[i]);
}
return (str - buf);
}
static ssize_t lprev_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct rio_dev *rdev = to_rio_dev(dev);
return sprintf(buf, "%s\n",
(rdev->prev) ? rio_name(rdev->prev) : "root");
}
static ssize_t lnext_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct rio_dev *rdev = to_rio_dev(dev);
char *str = buf;
int i;
if (rdev->pef & RIO_PEF_SWITCH) {
for (i = 0; i < RIO_GET_TOTAL_PORTS(rdev->swpinfo); i++) {
if (rdev->rswitch->nextdev[i])
str += sprintf(str, "%s\n",
rio_name(rdev->rswitch->nextdev[i]));
else
str += sprintf(str, "null\n");
}
}
return str - buf;
}
struct device_attribute rio_dev_attrs[] = {
__ATTR_RO(did),
__ATTR_RO(vid),
__ATTR_RO(device_rev),
__ATTR_RO(asm_did),
__ATTR_RO(asm_vid),
__ATTR_RO(asm_rev),
__ATTR_RO(lprev),
__ATTR_RO(destid),
__ATTR_NULL,
};
static DEVICE_ATTR(routes, S_IRUGO, routes_show, NULL);
static DEVICE_ATTR(lnext, S_IRUGO, lnext_show, NULL);
static DEVICE_ATTR(hopcount, S_IRUGO, hopcount_show, NULL);
static ssize_t
rio_read_config(struct file *filp, struct kobject *kobj,
struct bin_attribute *bin_attr,
char *buf, loff_t off, size_t count)
{
struct rio_dev *dev =
to_rio_dev(container_of(kobj, struct device, kobj));
unsigned int size = 0x100;
loff_t init_off = off;
u8 *data = (u8 *) buf;
/* Several chips lock up trying to read undefined config space */
if (capable(CAP_SYS_ADMIN))
size = RIO_MAINT_SPACE_SZ;
if (off >= size)
return 0;
if (off + count > size) {
size -= off;
count = size;
} else {
size = count;
}
if ((off & 1) && size) {
u8 val;
rio_read_config_8(dev, off, &val);
data[off - init_off] = val;
off++;
size--;
}
if ((off & 3) && size > 2) {
u16 val;
rio_read_config_16(dev, off, &val);
data[off - init_off] = (val >> 8) & 0xff;
data[off - init_off + 1] = val & 0xff;
off += 2;
size -= 2;
}
while (size > 3) {
u32 val;
rio_read_config_32(dev, off, &val);
data[off - init_off] = (val >> 24) & 0xff;
data[off - init_off + 1] = (val >> 16) & 0xff;
data[off - init_off + 2] = (val >> 8) & 0xff;
data[off - init_off + 3] = val & 0xff;
off += 4;
size -= 4;
}
if (size >= 2) {
u16 val;
rio_read_config_16(dev, off, &val);
data[off - init_off] = (val >> 8) & 0xff;
data[off - init_off + 1] = val & 0xff;
off += 2;
size -= 2;
}
if (size > 0) {
u8 val;
rio_read_config_8(dev, off, &val);
data[off - init_off] = val;
off++;
--size;
}
return count;
}
static ssize_t
rio_write_config(struct file *filp, struct kobject *kobj,
struct bin_attribute *bin_attr,
char *buf, loff_t off, size_t count)
{
struct rio_dev *dev =
to_rio_dev(container_of(kobj, struct device, kobj));
unsigned int size = count;
loff_t init_off = off;
u8 *data = (u8 *) buf;
if (off >= RIO_MAINT_SPACE_SZ)
return 0;
if (off + count > RIO_MAINT_SPACE_SZ) {
size = RIO_MAINT_SPACE_SZ - off;
count = size;
}
if ((off & 1) && size) {
rio_write_config_8(dev, off, data[off - init_off]);
off++;
size--;
}
if ((off & 3) && (size > 2)) {
u16 val = data[off - init_off + 1];
val |= (u16) data[off - init_off] << 8;
rio_write_config_16(dev, off, val);
off += 2;
size -= 2;
}
while (size > 3) {
u32 val = data[off - init_off + 3];
val |= (u32) data[off - init_off + 2] << 8;
val |= (u32) data[off - init_off + 1] << 16;
val |= (u32) data[off - init_off] << 24;
rio_write_config_32(dev, off, val);
off += 4;
size -= 4;
}
if (size >= 2) {
u16 val = data[off - init_off + 1];
val |= (u16) data[off - init_off] << 8;
rio_write_config_16(dev, off, val);
off += 2;
size -= 2;
}
if (size) {
rio_write_config_8(dev, off, data[off - init_off]);
off++;
--size;
}
return count;
}
static struct bin_attribute rio_config_attr = {
.attr = {
.name = "config",
.mode = S_IRUGO | S_IWUSR,
},
.size = RIO_MAINT_SPACE_SZ,
.read = rio_read_config,
.write = rio_write_config,
};
/**
* rio_create_sysfs_dev_files - create RIO specific sysfs files
* @rdev: device whose entries should be created
*
* Create files when @rdev is added to sysfs.
*/
int rio_create_sysfs_dev_files(struct rio_dev *rdev)
{
int err = 0;
err = device_create_bin_file(&rdev->dev, &rio_config_attr);
if (!err && (rdev->pef & RIO_PEF_SWITCH)) {
err |= device_create_file(&rdev->dev, &dev_attr_routes);
err |= device_create_file(&rdev->dev, &dev_attr_lnext);
err |= device_create_file(&rdev->dev, &dev_attr_hopcount);
if (!err && rdev->rswitch->sw_sysfs)
err = rdev->rswitch->sw_sysfs(rdev, RIO_SW_SYSFS_CREATE);
}
if (err)
pr_warning("RIO: Failed to create attribute file(s) for %s\n",
rio_name(rdev));
return err;
}
/**
* rio_remove_sysfs_dev_files - cleanup RIO specific sysfs files
* @rdev: device whose entries we should free
*
* Cleanup when @rdev is removed from sysfs.
*/
void rio_remove_sysfs_dev_files(struct rio_dev *rdev)
{
device_remove_bin_file(&rdev->dev, &rio_config_attr);
if (rdev->pef & RIO_PEF_SWITCH) {
device_remove_file(&rdev->dev, &dev_attr_routes);
device_remove_file(&rdev->dev, &dev_attr_lnext);
device_remove_file(&rdev->dev, &dev_attr_hopcount);
if (rdev->rswitch->sw_sysfs)
rdev->rswitch->sw_sysfs(rdev, RIO_SW_SYSFS_REMOVE);
}
}
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