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 /**
  47  * vio_register_device_iseries: - Register a new iSeries vio device.
  48  * @voidev:     The device to register.
  49  */
  50 static struct vio_dev *__init vio_register_device_iseries(char *type,
  51                 uint32_t unit_num)
  52 {
  53         struct vio_dev *viodev;
  54
  55         /* allocate a vio_dev for this device */
  56         viodev = kmalloc(sizeof(struct vio_dev), GFP_KERNEL);
  57         if (!viodev)
  58                 return NULL;
  59         memset(viodev, 0, sizeof(struct vio_dev));
  60
  61         snprintf(viodev->dev.bus_id, BUS_ID_SIZE, "%s%d", type, unit_num);
  62
  63         viodev->name = viodev->dev.bus_id;
  64         viodev->type = type;
  65         viodev->unit_address = unit_num;
  66         viodev->iommu_table = &vio_iommu_table;
  67         if (vio_register_device(viodev) == NULL) {
  68                 kfree(viodev);
  69                 return NULL;
  70         }
  71         return viodev;
  72 }
  73
  74 void __init probe_bus_iseries(void)
  75 {
  76         HvLpIndexMap vlan_map;
  77         struct vio_dev *viodev;
  78         int i;
  79
  80         /* there is only one of each of these */
  81         vio_register_device_iseries("viocons", 0);
  82         vio_register_device_iseries("vscsi", 0);
  83
  84         vlan_map = HvLpConfig_getVirtualLanIndexMap();
  85         for (i = 0; i < HVMAXARCHITECTEDVIRTUALLANS; i++) {
  86                 if ((vlan_map & (0x8000 >> i)) == 0)
  87                         continue;
  88                 viodev = vio_register_device_iseries("vlan", i);
  89                 /* veth is special and has it own iommu_table */
  90                 viodev->iommu_table = &veth_iommu_table;
  91         }
  92         for (i = 0; i < HVMAXARCHITECTEDVIRTUALDISKS; i++)
  93                 vio_register_device_iseries("viodasd", i);
  94         for (i = 0; i < HVMAXARCHITECTEDVIRTUALCDROMS; i++)
  95                 vio_register_device_iseries("viocd", i);
  96         for (i = 0; i < HVMAXARCHITECTEDVIRTUALTAPES; i++)
  97                 vio_register_device_iseries("viotape", i);
  98 }
  99
 100 /**
 101  * vio_match_device_iseries: - Tell if a iSeries VIO device matches a
 102  *      vio_device_id
 103  */
 104 static int vio_match_device_iseries(const struct vio_device_id *id,
 105                 const struct vio_dev *dev)
 106 {
 107         return strncmp(dev->type, id->type, strlen(id->type)) == 0;
 108 }
 109
 110 static struct vio_bus_ops vio_bus_ops_iseries = {
 111         .match = vio_match_device_iseries,
 112 };
 113
 114 /**
 115  * vio_bus_init_iseries: - Initialize the iSeries virtual IO bus
 116  */
 117 static int __init vio_bus_init_iseries(void)
 118 {
 119         int err;
 120
 121         err = vio_bus_init(&vio_bus_ops_iseries);
 122         if (err == 0) {
 123                 iommu_vio_init();
 124                 vio_bus_device.iommu_table = &vio_iommu_table;
 125                 iSeries_vio_dev = &vio_bus_device.dev;
 126                 probe_bus_iseries();
 127         }
 128         return err;
 129 }
 130
 131 __initcall(vio_bus_init_iseries);