forked from Minki/linux
157 lines
4.2 KiB
C
157 lines
4.2 KiB
C
/*
|
|
* 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/tce.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);
|