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/*
* IBM PowerPC iSeries Virtual I/O Infrastructure Support.
*
* Copyright (c) 2005 Stephen Rothwell, IBM Corp.
*
* 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/types.h>
#include <linux/device.h>
#include <linux/init.h>
#include <asm/vio.h>
#include <asm/iommu.h>
#include <asm/abs_addr.h>
#include <asm/page.h>
#include <asm/iSeries/vio.h>
#include <asm/iSeries/HvTypes.h>
#include <asm/iSeries/HvLpConfig.h>
#include <asm/iSeries/HvCallXm.h>
struct device *iSeries_vio_dev = &vio_bus_device.dev;
EXPORT_SYMBOL(iSeries_vio_dev);
static struct iommu_table veth_iommu_table;
static struct iommu_table vio_iommu_table;
static void __init iommu_vio_init(void)
{
struct iommu_table *t;
struct iommu_table_cb cb;
unsigned long cbp;
unsigned long itc_entries;
cb.itc_busno = 255; /* Bus 255 is the virtual bus */
cb.itc_virtbus = 0xff; /* Ask for virtual bus */
cbp = virt_to_abs(&cb);
HvCallXm_getTceTableParms(cbp);
itc_entries = cb.itc_size * PAGE_SIZE / sizeof(union tce_entry);
veth_iommu_table.it_size = itc_entries / 2;
veth_iommu_table.it_busno = cb.itc_busno;
veth_iommu_table.it_offset = cb.itc_offset;
veth_iommu_table.it_index = cb.itc_index;
veth_iommu_table.it_type = TCE_VB;
veth_iommu_table.it_blocksize = 1;
t = iommu_init_table(&veth_iommu_table);
if (!t)
printk("Virtual Bus VETH TCE table failed.\n");
vio_iommu_table.it_size = itc_entries - veth_iommu_table.it_size;
vio_iommu_table.it_busno = cb.itc_busno;
vio_iommu_table.it_offset = cb.itc_offset +
veth_iommu_table.it_size;
vio_iommu_table.it_index = cb.itc_index;
vio_iommu_table.it_type = TCE_VB;
vio_iommu_table.it_blocksize = 1;
t = iommu_init_table(&vio_iommu_table);
if (!t)
printk("Virtual Bus VIO TCE table failed.\n");
}
/**
* vio_register_device_iseries: - Register a new iSeries vio device.
* @voidev: The device to register.
*/
static struct vio_dev *__init vio_register_device_iseries(char *type,
uint32_t unit_num)
{
struct vio_dev *viodev;
/* allocate a vio_dev for this device */
viodev = kmalloc(sizeof(struct vio_dev), GFP_KERNEL);
if (!viodev)
return NULL;
memset(viodev, 0, sizeof(struct vio_dev));
snprintf(viodev->dev.bus_id, BUS_ID_SIZE, "%s%d", type, unit_num);
viodev->name = viodev->dev.bus_id;
viodev->type = type;
viodev->unit_address = unit_num;
viodev->iommu_table = &vio_iommu_table;
if (vio_register_device(viodev) == NULL) {
kfree(viodev);
return NULL;
}
return viodev;
}
void __init probe_bus_iseries(void)
{
HvLpIndexMap vlan_map;
struct vio_dev *viodev;
int i;
/* there is only one of each of these */
vio_register_device_iseries("viocons", 0);
vio_register_device_iseries("vscsi", 0);
vlan_map = HvLpConfig_getVirtualLanIndexMap();
for (i = 0; i < HVMAXARCHITECTEDVIRTUALLANS; i++) {
if ((vlan_map & (0x8000 >> i)) == 0)
continue;
viodev = vio_register_device_iseries("vlan", i);
/* veth is special and has it own iommu_table */
viodev->iommu_table = &veth_iommu_table;
}
for (i = 0; i < HVMAXARCHITECTEDVIRTUALDISKS; i++)
vio_register_device_iseries("viodasd", i);
for (i = 0; i < HVMAXARCHITECTEDVIRTUALCDROMS; i++)
vio_register_device_iseries("viocd", i);
for (i = 0; i < HVMAXARCHITECTEDVIRTUALTAPES; i++)
vio_register_device_iseries("viotape", i);
}
/**
* vio_match_device_iseries: - Tell if a iSeries VIO device matches a
* vio_device_id
*/
static int vio_match_device_iseries(const struct vio_device_id *id,
const struct vio_dev *dev)
{
return strncmp(dev->type, id->type, strlen(id->type)) == 0;
}
static struct vio_bus_ops vio_bus_ops_iseries = {
.match = vio_match_device_iseries,
};
/**
* vio_bus_init_iseries: - Initialize the iSeries virtual IO bus
*/
static int __init vio_bus_init_iseries(void)
{
int err;
err = vio_bus_init(&vio_bus_ops_iseries);
if (err == 0) {
iommu_vio_init();
vio_bus_device.iommu_table = &vio_iommu_table;
iSeries_vio_dev = &vio_bus_device.dev;
probe_bus_iseries();
}
return err;
}
__initcall(vio_bus_init_iseries);
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