2 * IBM PowerPC iSeries Virtual I/O Infrastructure Support.
4 * Copyright (c) 2005 Stephen Rothwell, IBM Corp.
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.
11 #include <linux/types.h>
12 #include <linux/device.h>
13 #include <linux/init.h>
16 #include <asm/iommu.h>
18 #include <asm/abs_addr.h>
20 #include <asm/iSeries/vio.h>
21 #include <asm/iSeries/HvTypes.h>
22 #include <asm/iseries/hv_lp_config.h>
23 #include <asm/iseries/hv_call_xm.h>
25 struct device *iSeries_vio_dev = &vio_bus_device.dev;
26 EXPORT_SYMBOL(iSeries_vio_dev);
28 static struct iommu_table veth_iommu_table;
29 static struct iommu_table vio_iommu_table;
31 static void __init iommu_vio_init(void)
33 struct iommu_table *t;
34 struct iommu_table_cb cb;
36 unsigned long itc_entries;
38 cb.itc_busno = 255; /* Bus 255 is the virtual bus */
39 cb.itc_virtbus = 0xff; /* Ask for virtual bus */
41 cbp = virt_to_abs(&cb);
42 HvCallXm_getTceTableParms(cbp);
44 itc_entries = cb.itc_size * PAGE_SIZE / sizeof(union tce_entry);
45 veth_iommu_table.it_size = itc_entries / 2;
46 veth_iommu_table.it_busno = cb.itc_busno;
47 veth_iommu_table.it_offset = cb.itc_offset;
48 veth_iommu_table.it_index = cb.itc_index;
49 veth_iommu_table.it_type = TCE_VB;
50 veth_iommu_table.it_blocksize = 1;
52 t = iommu_init_table(&veth_iommu_table);
55 printk("Virtual Bus VETH TCE table failed.\n");
57 vio_iommu_table.it_size = itc_entries - veth_iommu_table.it_size;
58 vio_iommu_table.it_busno = cb.itc_busno;
59 vio_iommu_table.it_offset = cb.itc_offset +
60 veth_iommu_table.it_size;
61 vio_iommu_table.it_index = cb.itc_index;
62 vio_iommu_table.it_type = TCE_VB;
63 vio_iommu_table.it_blocksize = 1;
65 t = iommu_init_table(&vio_iommu_table);
68 printk("Virtual Bus VIO TCE table failed.\n");
72 * vio_register_device_iseries: - Register a new iSeries vio device.
73 * @voidev: The device to register.
75 static struct vio_dev *__init vio_register_device_iseries(char *type,
78 struct vio_dev *viodev;
80 /* allocate a vio_dev for this device */
81 viodev = kmalloc(sizeof(struct vio_dev), GFP_KERNEL);
84 memset(viodev, 0, sizeof(struct vio_dev));
86 snprintf(viodev->dev.bus_id, BUS_ID_SIZE, "%s%d", type, unit_num);
88 viodev->name = viodev->dev.bus_id;
90 viodev->unit_address = unit_num;
91 viodev->iommu_table = &vio_iommu_table;
92 if (vio_register_device(viodev) == NULL) {
99 void __init probe_bus_iseries(void)
101 HvLpIndexMap vlan_map;
102 struct vio_dev *viodev;
105 /* there is only one of each of these */
106 vio_register_device_iseries("viocons", 0);
107 vio_register_device_iseries("vscsi", 0);
109 vlan_map = HvLpConfig_getVirtualLanIndexMap();
110 for (i = 0; i < HVMAXARCHITECTEDVIRTUALLANS; i++) {
111 if ((vlan_map & (0x8000 >> i)) == 0)
113 viodev = vio_register_device_iseries("vlan", i);
114 /* veth is special and has it own iommu_table */
115 viodev->iommu_table = &veth_iommu_table;
117 for (i = 0; i < HVMAXARCHITECTEDVIRTUALDISKS; i++)
118 vio_register_device_iseries("viodasd", i);
119 for (i = 0; i < HVMAXARCHITECTEDVIRTUALCDROMS; i++)
120 vio_register_device_iseries("viocd", i);
121 for (i = 0; i < HVMAXARCHITECTEDVIRTUALTAPES; i++)
122 vio_register_device_iseries("viotape", i);
126 * vio_match_device_iseries: - Tell if a iSeries VIO device matches a
129 static int vio_match_device_iseries(const struct vio_device_id *id,
130 const struct vio_dev *dev)
132 return strncmp(dev->type, id->type, strlen(id->type)) == 0;
135 static struct vio_bus_ops vio_bus_ops_iseries = {
136 .match = vio_match_device_iseries,
140 * vio_bus_init_iseries: - Initialize the iSeries virtual IO bus
142 static int __init vio_bus_init_iseries(void)
146 err = vio_bus_init(&vio_bus_ops_iseries);
149 vio_bus_device.iommu_table = &vio_iommu_table;
150 iSeries_vio_dev = &vio_bus_device.dev;
156 __initcall(vio_bus_init_iseries);