arch/powerpc/platforms/iseries/vio.c

   1 /*
   2  * IBM PowerPC iSeries Virtual I/O Infrastructure Support.
   3  *
   4  *    Copyright (c) 2005 Stephen Rothwell, IBM Corp.
   5  *
   6  *      This program is free software; you can redistribute it and/or
   7  *      modify it under the terms of the GNU General Public License
   8  *      as published by the Free Software Foundation; either version
   9  *      2 of the License, or (at your option) any later version.
  10  */
  11 #include <linux/types.h>
  12 #include <linux/device.h>
  13 #include <linux/init.h>
  14
  15 #include <asm/vio.h>
  16 #include <asm/iommu.h>
  17 #include <asm/tce.h>
  18 #include <asm/abs_addr.h>
  19 #include <asm/page.h>
  20 #include <asm/iseries/vio.h>
  21 #include <asm/iseries/hv_types.h>
  22 #include <asm/iseries/hv_lp_config.h>
  23 #include <asm/iseries/hv_call_xm.h>
  24
  25 #include "iommu.h"
  26
  27 struct device *iSeries_vio_dev = &vio_bus_device.dev;
  28 EXPORT_SYMBOL(iSeries_vio_dev);
  29
  30 static struct iommu_table veth_iommu_table;
  31 static struct iommu_table vio_iommu_table;
  32
  33 static void __init iommu_vio_init(void)
  34 {
  35         iommu_table_getparms_iSeries(255, 0, 0xff, &veth_iommu_table);
  36         veth_iommu_table.it_size /= 2;
  37         vio_iommu_table = veth_iommu_table;
  38         vio_iommu_table.it_offset += veth_iommu_table.it_size;
  39
  40         if (!iommu_init_table(&veth_iommu_table))
  41                 printk("Virtual Bus VETH TCE table failed.\n");
  42         if (!iommu_init_table(&vio_iommu_table))
  43                 printk("Virtual Bus VIO TCE table failed.\n");
  44 }
  45
  46 static struct iommu_table *vio_build_iommu_table(struct vio_dev *dev)
  47 {
  48         if (strcmp(dev->type, "vlan") == 0)
  49                 return &veth_iommu_table;
  50         return &vio_iommu_table;
  51 }
  52
  53 static struct vio_bus_ops vio_bus_ops_iseries = {
  54         .build_iommu_table = vio_build_iommu_table,
  55 };
  56
  57 /**
  58  * vio_bus_init_iseries: - Initialize the iSeries virtual IO bus
  59  */
  60 static int __init vio_bus_init_iseries(void)
  61 {
  62         iommu_vio_init();
  63         vio_bus_device.iommu_table = &vio_iommu_table;
  64         iSeries_vio_dev = &vio_bus_device.dev;
  65         return vio_bus_init(&vio_bus_ops_iseries);
  66 }
  67 __initcall(vio_bus_init_iseries);