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3e494c80 SR |
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/abs_addr.h> | |
18 | #include <asm/page.h> | |
19 | #include <asm/iSeries/vio.h> | |
20 | #include <asm/iSeries/HvTypes.h> | |
21 | #include <asm/iSeries/HvLpConfig.h> | |
22 | #include <asm/iSeries/HvCallXm.h> | |
23 | ||
24 | struct device *iSeries_vio_dev = &vio_bus_device.dev; | |
25 | EXPORT_SYMBOL(iSeries_vio_dev); | |
26 | ||
27 | static struct iommu_table veth_iommu_table; | |
28 | static struct iommu_table vio_iommu_table; | |
29 | ||
8c65b5c9 | 30 | static void __init iommu_vio_init(void) |
3e494c80 SR |
31 | { |
32 | struct iommu_table *t; | |
33 | struct iommu_table_cb cb; | |
34 | unsigned long cbp; | |
35 | unsigned long itc_entries; | |
36 | ||
37 | cb.itc_busno = 255; /* Bus 255 is the virtual bus */ | |
38 | cb.itc_virtbus = 0xff; /* Ask for virtual bus */ | |
39 | ||
40 | cbp = virt_to_abs(&cb); | |
41 | HvCallXm_getTceTableParms(cbp); | |
42 | ||
43 | itc_entries = cb.itc_size * PAGE_SIZE / sizeof(union tce_entry); | |
44 | veth_iommu_table.it_size = itc_entries / 2; | |
45 | veth_iommu_table.it_busno = cb.itc_busno; | |
46 | veth_iommu_table.it_offset = cb.itc_offset; | |
47 | veth_iommu_table.it_index = cb.itc_index; | |
48 | veth_iommu_table.it_type = TCE_VB; | |
49 | veth_iommu_table.it_blocksize = 1; | |
50 | ||
51 | t = iommu_init_table(&veth_iommu_table); | |
52 | ||
53 | if (!t) | |
54 | printk("Virtual Bus VETH TCE table failed.\n"); | |
55 | ||
56 | vio_iommu_table.it_size = itc_entries - veth_iommu_table.it_size; | |
57 | vio_iommu_table.it_busno = cb.itc_busno; | |
58 | vio_iommu_table.it_offset = cb.itc_offset + | |
59 | veth_iommu_table.it_size; | |
60 | vio_iommu_table.it_index = cb.itc_index; | |
61 | vio_iommu_table.it_type = TCE_VB; | |
62 | vio_iommu_table.it_blocksize = 1; | |
63 | ||
64 | t = iommu_init_table(&vio_iommu_table); | |
65 | ||
66 | if (!t) | |
67 | printk("Virtual Bus VIO TCE table failed.\n"); | |
68 | } | |
69 | ||
70 | /** | |
71 | * vio_register_device: - Register a new vio device. | |
72 | * @voidev: The device to register. | |
73 | */ | |
74 | static struct vio_dev *__init vio_register_device_iseries(char *type, | |
75 | uint32_t unit_num) | |
76 | { | |
77 | struct vio_dev *viodev; | |
78 | ||
79 | /* allocate a vio_dev for this node */ | |
80 | viodev = kmalloc(sizeof(struct vio_dev), GFP_KERNEL); | |
81 | if (!viodev) | |
82 | return NULL; | |
83 | memset(viodev, 0, sizeof(struct vio_dev)); | |
84 | ||
85 | snprintf(viodev->dev.bus_id, BUS_ID_SIZE, "%s%d", type, unit_num); | |
86 | ||
87 | return vio_register_device_common(viodev, viodev->dev.bus_id, type, | |
88 | unit_num, &vio_iommu_table); | |
89 | } | |
90 | ||
91 | void __init probe_bus_iseries(void) | |
92 | { | |
93 | HvLpIndexMap vlan_map; | |
94 | struct vio_dev *viodev; | |
95 | int i; | |
96 | ||
97 | /* there is only one of each of these */ | |
98 | vio_register_device_iseries("viocons", 0); | |
99 | vio_register_device_iseries("vscsi", 0); | |
100 | ||
101 | vlan_map = HvLpConfig_getVirtualLanIndexMap(); | |
102 | for (i = 0; i < HVMAXARCHITECTEDVIRTUALLANS; i++) { | |
103 | if ((vlan_map & (0x8000 >> i)) == 0) | |
104 | continue; | |
105 | viodev = vio_register_device_iseries("vlan", i); | |
106 | /* veth is special and has it own iommu_table */ | |
107 | viodev->iommu_table = &veth_iommu_table; | |
108 | } | |
109 | for (i = 0; i < HVMAXARCHITECTEDVIRTUALDISKS; i++) | |
110 | vio_register_device_iseries("viodasd", i); | |
111 | for (i = 0; i < HVMAXARCHITECTEDVIRTUALCDROMS; i++) | |
112 | vio_register_device_iseries("viocd", i); | |
113 | for (i = 0; i < HVMAXARCHITECTEDVIRTUALTAPES; i++) | |
114 | vio_register_device_iseries("viotape", i); | |
115 | } | |
116 | ||
117 | /** | |
118 | * vio_bus_init_iseries: - Initialize the iSeries virtual IO bus | |
119 | */ | |
120 | static int __init vio_bus_init_iseries(void) | |
121 | { | |
122 | int err; | |
123 | ||
124 | err = vio_bus_init(); | |
125 | if (err == 0) { | |
8c65b5c9 | 126 | iommu_vio_init(); |
3e494c80 SR |
127 | vio_bus_device.iommu_table = &vio_iommu_table; |
128 | iSeries_vio_dev = &vio_bus_device.dev; | |
129 | probe_bus_iseries(); | |
130 | } | |
131 | return err; | |
132 | } | |
133 | ||
134 | __initcall(vio_bus_init_iseries); |