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|
/* vio.c: Virtual I/O channel devices probing infrastructure.
*
* Copyright (c) 2003-2005 IBM Corp.
* Dave Engebretsen engebret@us.ibm.com
* Santiago Leon santil@us.ibm.com
* Hollis Blanchard <hollisb@us.ibm.com>
* Stephen Rothwell
*
* Adapted to sparc64 by David S. Miller davem@davemloft.net
*/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/irq.h>
#include <linux/export.h>
#include <linux/init.h>
#include <asm/mdesc.h>
#include <asm/vio.h>
static const struct vio_device_id *vio_match_device(
const struct vio_device_id *matches,
const struct vio_dev *dev)
{
const char *type, *compat;
int len;
type = dev->type;
compat = dev->compat;
len = dev->compat_len;
while (matches->type[0] || matches->compat[0]) {
int match = 1;
if (matches->type[0])
match &= !strcmp(matches->type, type);
if (matches->compat[0]) {
match &= len &&
of_find_in_proplist(compat, matches->compat, len);
}
if (match)
return matches;
matches++;
}
return NULL;
}
static int vio_bus_match(struct device *dev, struct device_driver *drv)
{
struct vio_dev *vio_dev = to_vio_dev(dev);
struct vio_driver *vio_drv = to_vio_driver(drv);
const struct vio_device_id *matches = vio_drv->id_table;
if (!matches)
return 0;
return vio_match_device(matches, vio_dev) != NULL;
}
static int vio_device_probe(struct device *dev)
{
struct vio_dev *vdev = to_vio_dev(dev);
struct vio_driver *drv = to_vio_driver(dev->driver);
const struct vio_device_id *id;
int error = -ENODEV;
if (drv->probe) {
id = vio_match_device(drv->id_table, vdev);
if (id)
error = drv->probe(vdev, id);
}
return error;
}
static int vio_device_remove(struct device *dev)
{
struct vio_dev *vdev = to_vio_dev(dev);
struct vio_driver *drv = to_vio_driver(dev->driver);
if (drv->remove)
return drv->remove(vdev);
return 1;
}
static ssize_t devspec_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct vio_dev *vdev = to_vio_dev(dev);
const char *str = "none";
if (!strcmp(vdev->type, "vnet-port"))
str = "vnet";
else if (!strcmp(vdev->type, "vdc-port"))
str = "vdisk";
return sprintf(buf, "%s\n", str);
}
static ssize_t type_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct vio_dev *vdev = to_vio_dev(dev);
return sprintf(buf, "%s\n", vdev->type);
}
static struct device_attribute vio_dev_attrs[] = {
__ATTR_RO(devspec),
__ATTR_RO(type),
__ATTR_NULL
};
static struct bus_type vio_bus_type = {
.name = "vio",
.dev_attrs = vio_dev_attrs,
.match = vio_bus_match,
.probe = vio_device_probe,
.remove = vio_device_remove,
};
int __vio_register_driver(struct vio_driver *viodrv, struct module *owner,
const char *mod_name)
{
viodrv->driver.bus = &vio_bus_type;
viodrv->driver.name = viodrv->name;
viodrv->driver.owner = owner;
viodrv->driver.mod_name = mod_name;
return driver_register(&viodrv->driver);
}
EXPORT_SYMBOL(__vio_register_driver);
void vio_unregister_driver(struct vio_driver *viodrv)
{
driver_unregister(&viodrv->driver);
}
EXPORT_SYMBOL(vio_unregister_driver);
static void vio_dev_release(struct device *dev)
{
kfree(to_vio_dev(dev));
}
static ssize_t
show_pciobppath_attr(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct vio_dev *vdev;
struct device_node *dp;
vdev = to_vio_dev(dev);
dp = vdev->dp;
return snprintf (buf, PAGE_SIZE, "%s\n", dp->full_name);
}
static DEVICE_ATTR(obppath, S_IRUSR | S_IRGRP | S_IROTH,
show_pciobppath_attr, NULL);
static struct device_node *cdev_node;
static struct vio_dev *root_vdev;
static u64 cdev_cfg_handle;
static void vio_fill_channel_info(struct mdesc_handle *hp, u64 mp,
struct vio_dev *vdev)
{
u64 a;
mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_FWD) {
const u64 *chan_id;
const u64 *irq;
u64 target;
target = mdesc_arc_target(hp, a);
irq = mdesc_get_property(hp, target, "tx-ino", NULL);
if (irq)
vdev->tx_irq = sun4v_build_virq(cdev_cfg_handle, *irq);
irq = mdesc_get_property(hp, target, "rx-ino", NULL);
if (irq) {
vdev->rx_irq = sun4v_build_virq(cdev_cfg_handle, *irq);
vdev->rx_ino = *irq;
}
chan_id = mdesc_get_property(hp, target, "id", NULL);
if (chan_id)
vdev->channel_id = *chan_id;
}
}
int vio_set_intr(unsigned long dev_ino, int state)
{
int err;
err = sun4v_vintr_set_valid(cdev_cfg_handle, dev_ino, state);
return err;
}
EXPORT_SYMBOL(vio_set_intr);
static struct vio_dev *vio_create_one(struct mdesc_handle *hp, u64 mp,
struct device *parent)
{
const char *type, *compat, *bus_id_name;
struct device_node *dp;
struct vio_dev *vdev;
int err, tlen, clen;
const u64 *id, *cfg_handle;
u64 a;
type = mdesc_get_property(hp, mp, "device-type", &tlen);
if (!type) {
type = mdesc_get_property(hp, mp, "name", &tlen);
if (!type) {
type = mdesc_node_name(hp, mp);
tlen = strlen(type) + 1;
}
}
if (tlen > VIO_MAX_TYPE_LEN) {
printk(KERN_ERR "VIO: Type string [%s] is too long.\n",
type);
return NULL;
}
id = mdesc_get_property(hp, mp, "id", NULL);
cfg_handle = NULL;
mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_BACK) {
u64 target;
target = mdesc_arc_target
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