288 lines
6.7 KiB
C
288 lines
6.7 KiB
C
/*
|
|
* 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);
|
|
}
|
|
}
|