Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
[PATCH] ppc64: split pSeries specific parts out of vio.c
This patch just splits out the pSeries specific parts of vio.c.
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
authored by
Stephen Rothwell
and committed by
Paul Mackerras
19dbd0f6
6312236f
+1
arch/ppc64/kernel/Makefile
+1
arch/ppc64/kernel/Makefile
+1
-1
arch/ppc64/kernel/iSeries_vio.c
+1
-1
arch/ppc64/kernel/iSeries_vio.c
+266
arch/ppc64/kernel/pSeries_vio.c
+266
arch/ppc64/kernel/pSeries_vio.c
···
1
+
/*
2
+
* IBM PowerPC pSeries Virtual I/O Infrastructure Support.
3
+
*
4
+
* Copyright (c) 2003-2005 IBM Corp.
5
+
* Dave Engebretsen engebret@us.ibm.com
6
+
* Santiago Leon santil@us.ibm.com
7
+
* Hollis Blanchard <hollisb@us.ibm.com>
8
+
* Stephen Rothwell
9
+
*
10
+
* This program is free software; you can redistribute it and/or
11
+
* modify it under the terms of the GNU General Public License
12
+
* as published by the Free Software Foundation; either version
13
+
* 2 of the License, or (at your option) any later version.
14
+
*/
15
+
16
+
#include <linux/init.h>
17
+
#include <linux/module.h>
18
+
#include <linux/mm.h>
19
+
#include <linux/kobject.h>
20
+
#include <asm/iommu.h>
21
+
#include <asm/dma.h>
22
+
#include <asm/vio.h>
23
+
#include <asm/hvcall.h>
24
+
25
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extern struct subsystem devices_subsys; /* needed for vio_find_name() */
26
+
27
+
static void probe_bus_pseries(void)
28
+
{
29
+
struct device_node *node_vroot, *of_node;
30
+
31
+
node_vroot = find_devices("vdevice");
32
+
if ((node_vroot == NULL) || (node_vroot->child == NULL))
33
+
/* this machine doesn't do virtual IO, and that's ok */
34
+
return;
35
+
36
+
/*
37
+
* Create struct vio_devices for each virtual device in the device tree.
38
+
* Drivers will associate with them later.
39
+
*/
40
+
for (of_node = node_vroot->child; of_node != NULL;
41
+
of_node = of_node->sibling) {
42
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printk(KERN_DEBUG "%s: processing %p\n", __FUNCTION__, of_node);
43
+
vio_register_device_node(of_node);
44
+
}
45
+
}
46
+
47
+
/**
48
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* vio_match_device_pseries: - Tell if a pSeries VIO device matches a
49
+
* vio_device_id
50
+
*/
51
+
static int vio_match_device_pseries(const struct vio_device_id *id,
52
+
const struct vio_dev *dev)
53
+
{
54
+
return (strncmp(dev->type, id->type, strlen(id->type)) == 0) &&
55
+
device_is_compatible(dev->dev.platform_data, id->compat);
56
+
}
57
+
58
+
static void vio_release_device_pseries(struct device *dev)
59
+
{
60
+
/* XXX free TCE table */
61
+
of_node_put(dev->platform_data);
62
+
}
63
+
64
+
static ssize_t viodev_show_devspec(struct device *dev,
65
+
struct device_attribute *attr, char *buf)
66
+
{
67
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struct device_node *of_node = dev->platform_data;
68
+
69
+
return sprintf(buf, "%s\n", of_node->full_name);
70
+
}
71
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DEVICE_ATTR(devspec, S_IRUSR | S_IRGRP | S_IROTH, viodev_show_devspec, NULL);
72
+
73
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static void vio_unregister_device_pseries(struct vio_dev *viodev)
74
+
{
75
+
device_remove_file(&viodev->dev, &dev_attr_devspec);
76
+
}
77
+
78
+
/**
79
+
* vio_bus_init_pseries: - Initialize the pSeries virtual IO bus
80
+
*/
81
+
static int __init vio_bus_init_pseries(void)
82
+
{
83
+
int err;
84
+
85
+
err = vio_bus_init(vio_match_device_pseries,
86
+
vio_unregister_device_pseries,
87
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vio_release_device_pseries);
88
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if (err == 0)
89
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probe_bus_pseries();
90
+
return err;
91
+
}
92
+
93
+
__initcall(vio_bus_init_pseries);
94
+
95
+
/**
96
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* vio_build_iommu_table: - gets the dma information from OF and
97
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* builds the TCE tree.
98
+
* @dev: the virtual device.
99
+
*
100
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* Returns a pointer to the built tce tree, or NULL if it can't
101
+
* find property.
102
+
*/
103
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static struct iommu_table *vio_build_iommu_table(struct vio_dev *dev)
104
+
{
105
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unsigned int *dma_window;
106
+
struct iommu_table *newTceTable;
107
+
unsigned long offset;
108
+
int dma_window_property_size;
109
+
110
+
dma_window = (unsigned int *) get_property(dev->dev.platform_data, "ibm,my-dma-window", &dma_window_property_size);
111
+
if(!dma_window) {
112
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return NULL;
113
+
}
114
+
115
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newTceTable = (struct iommu_table *) kmalloc(sizeof(struct iommu_table), GFP_KERNEL);
116
+
117
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/* There should be some code to extract the phys-encoded offset
118
+
using prom_n_addr_cells(). However, according to a comment
119
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on earlier versions, it's always zero, so we don't bother */
120
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offset = dma_window[1] >> PAGE_SHIFT;
121
+
122
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/* TCE table size - measured in tce entries */
123
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newTceTable->it_size = dma_window[4] >> PAGE_SHIFT;
124
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/* offset for VIO should always be 0 */
125
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newTceTable->it_offset = offset;
126
+
newTceTable->it_busno = 0;
127
+
newTceTable->it_index = (unsigned long)dma_window[0];
128
+
newTceTable->it_type = TCE_VB;
129
+
130
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return iommu_init_table(newTceTable);
131
+
}
132
+
133
+
/**
134
+
* vio_register_device_node: - Register a new vio device.
135
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* @of_node: The OF node for this device.
136
+
*
137
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* Creates and initializes a vio_dev structure from the data in
138
+
* of_node (dev.platform_data) and adds it to the list of virtual devices.
139
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* Returns a pointer to the created vio_dev or NULL if node has
140
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* NULL device_type or compatible fields.
141
+
*/
142
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struct vio_dev * __devinit vio_register_device_node(struct device_node *of_node)
143
+
{
144
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struct vio_dev *viodev;
145
+
unsigned int *unit_address;
146
+
unsigned int *irq_p;
147
+
148
+
/* we need the 'device_type' property, in order to match with drivers */
149
+
if ((NULL == of_node->type)) {
150
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printk(KERN_WARNING
151
+
"%s: node %s missing 'device_type'\n", __FUNCTION__,
152
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of_node->name ? of_node->name : "<unknown>");
153
+
return NULL;
154
+
}
155
+
156
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unit_address = (unsigned int *)get_property(of_node, "reg", NULL);
157
+
if (!unit_address) {
158
+
printk(KERN_WARNING "%s: node %s missing 'reg'\n", __FUNCTION__,
159
+
of_node->name ? of_node->name : "<unknown>");
160
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return NULL;
161
+
}
162
+
163
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/* allocate a vio_dev for this node */
164
+
viodev = kmalloc(sizeof(struct vio_dev), GFP_KERNEL);
165
+
if (!viodev) {
166
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return NULL;
167
+
}
168
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memset(viodev, 0, sizeof(struct vio_dev));
169
+
170
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viodev->dev.platform_data = of_node_get(of_node);
171
+
172
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viodev->irq = NO_IRQ;
173
+
irq_p = (unsigned int *)get_property(of_node, "interrupts", NULL);
174
+
if (irq_p) {
175
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int virq = virt_irq_create_mapping(*irq_p);
176
+
if (virq == NO_IRQ) {
177
+
printk(KERN_ERR "Unable to allocate interrupt "
178
+
"number for %s\n", of_node->full_name);
179
+
} else
180
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viodev->irq = irq_offset_up(virq);
181
+
}
182
+
183
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snprintf(viodev->dev.bus_id, BUS_ID_SIZE, "%x", *unit_address);
184
+
185
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/* register with generic device framework */
186
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if (vio_register_device_common(viodev, of_node->name, of_node->type,
187
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*unit_address, vio_build_iommu_table(viodev))
188
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== NULL) {
189
+
/* XXX free TCE table */
190
+
kfree(viodev);
191
+
return NULL;
192
+
}
193
+
device_create_file(&viodev->dev, &dev_attr_devspec);
194
+
195
+
return viodev;
196
+
}
197
+
EXPORT_SYMBOL(vio_register_device_node);
198
+
199
+
/**
200
+
* vio_get_attribute: - get attribute for virtual device
201
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* @vdev: The vio device to get property.
202
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* @which: The property/attribute to be extracted.
203
+
* @length: Pointer to length of returned data size (unused if NULL).
204
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*
205
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* Calls prom.c's get_property() to return the value of the
206
+
* attribute specified by the preprocessor constant @which
207
+
*/
208
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const void * vio_get_attribute(struct vio_dev *vdev, void* which, int* length)
209
+
{
210
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return get_property(vdev->dev.platform_data, (char*)which, length);
211
+
}
212
+
EXPORT_SYMBOL(vio_get_attribute);
213
+
214
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/* vio_find_name() - internal because only vio.c knows how we formatted the
215
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* kobject name
216
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* XXX once vio_bus_type.devices is actually used as a kset in
217
+
* drivers/base/bus.c, this function should be removed in favor of
218
+
* "device_find(kobj_name, &vio_bus_type)"
219
+
*/
220
+
static struct vio_dev *vio_find_name(const char *kobj_name)
221
+
{
222
+
struct kobject *found;
223
+
224
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found = kset_find_obj(&devices_subsys.kset, kobj_name);
225
+
if (!found)
226
+
return NULL;
227
+
228
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return to_vio_dev(container_of(found, struct device, kobj));
229
+
}
230
+
231
+
/**
232
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* vio_find_node - find an already-registered vio_dev
233
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* @vnode: device_node of the virtual device we're looking for
234
+
*/
235
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struct vio_dev *vio_find_node(struct device_node *vnode)
236
+
{
237
+
uint32_t *unit_address;
238
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char kobj_name[BUS_ID_SIZE];
239
+
240
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/* construct the kobject name from the device node */
241
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unit_address = (uint32_t *)get_property(vnode, "reg", NULL);
242
+
if (!unit_address)
243
+
return NULL;
244
+
snprintf(kobj_name, BUS_ID_SIZE, "%x", *unit_address);
245
+
246
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return vio_find_name(kobj_name);
247
+
}
248
+
EXPORT_SYMBOL(vio_find_node);
249
+
250
+
int vio_enable_interrupts(struct vio_dev *dev)
251
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{
252
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int rc = h_vio_signal(dev->unit_address, VIO_IRQ_ENABLE);
253
+
if (rc != H_Success)
254
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printk(KERN_ERR "vio: Error 0x%x enabling interrupts\n", rc);
255
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return rc;
256
+
}
257
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EXPORT_SYMBOL(vio_enable_interrupts);
258
+
259
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int vio_disable_interrupts(struct vio_dev *dev)
260
+
{
261
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int rc = h_vio_signal(dev->unit_address, VIO_IRQ_DISABLE);
262
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if (rc != H_Success)
263
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printk(KERN_ERR "vio: Error 0x%x disabling interrupts\n", rc);
264
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return rc;
265
+
}
266
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EXPORT_SYMBOL(vio_disable_interrupts);
+13
-277
arch/ppc64/kernel/vio.c
+13
-277
arch/ppc64/kernel/vio.c
···
1
1
/*
2
2
* IBM PowerPC Virtual I/O Infrastructure Support.
3
3
*
4
-
* Copyright (c) 2003 IBM Corp.
4
+
* Copyright (c) 2003-2005 IBM Corp.
5
5
* Dave Engebretsen engebret@us.ibm.com
6
6
* Santiago Leon santil@us.ibm.com
7
7
* Hollis Blanchard <hollisb@us.ibm.com>
8
+
* Stephen Rothwell
8
9
*
9
10
* This program is free software; you can redistribute it and/or
10
11
* modify it under the terms of the GNU General Public License
···
15
14
16
15
#include <linux/init.h>
17
16
#include <linux/console.h>
18
-
#include <linux/version.h>
19
17
#include <linux/module.h>
20
-
#include <linux/kobject.h>
21
18
#include <linux/mm.h>
22
19
#include <linux/dma-mapping.h>
23
-
#include <asm/rtas.h>
24
20
#include <asm/iommu.h>
25
21
#include <asm/dma.h>
26
-
#include <asm/ppcdebug.h>
27
22
#include <asm/vio.h>
28
-
#include <asm/hvcall.h>
29
-
30
-
#define DBGENTER() pr_debug("%s entered\n", __FUNCTION__)
31
-
32
-
extern struct subsystem devices_subsys; /* needed for vio_find_name() */
33
23
34
24
static const struct vio_device_id *vio_match_device(
35
25
const struct vio_device_id *, const struct vio_dev *);
36
26
37
-
#ifdef CONFIG_PPC_PSERIES
38
-
static struct iommu_table *vio_build_iommu_table(struct vio_dev *);
39
-
static int vio_num_address_cells;
40
-
#endif
41
27
struct vio_dev vio_bus_device = { /* fake "parent" device */
42
28
.name = vio_bus_device.dev.bus_id,
43
29
.type = "",
···
34
46
35
47
static int (*is_match)(const struct vio_device_id *id,
36
48
const struct vio_dev *dev);
49
+
static void (*unregister_device_callback)(struct vio_dev *dev);
50
+
static void (*release_device_callback)(struct device *dev);
37
51
38
52
/* convert from struct device to struct vio_dev and pass to driver.
39
53
* dev->driver has already been set by generic code because vio_bus_match
···
46
56
struct vio_driver *viodrv = to_vio_driver(dev->driver);
47
57
const struct vio_device_id *id;
48
58
int error = -ENODEV;
49
-
50
-
DBGENTER();
51
59
52
60
if (!viodrv->probe)
53
61
return error;
···
63
75
{
64
76
struct vio_dev *viodev = to_vio_dev(dev);
65
77
struct vio_driver *viodrv = to_vio_driver(dev->driver);
66
-
67
-
DBGENTER();
68
78
69
79
if (viodrv->remove) {
70
80
return viodrv->remove(viodev);
···
113
127
static const struct vio_device_id * vio_match_device(const struct vio_device_id *ids,
114
128
const struct vio_dev *dev)
115
129
{
116
-
DBGENTER();
117
-
118
130
while (ids->type) {
119
131
if (is_match(ids, dev))
120
132
return ids;
···
121
137
return NULL;
122
138
}
123
139
124
-
#ifdef CONFIG_PPC_PSERIES
125
-
static void probe_bus_pseries(void)
126
-
{
127
-
struct device_node *node_vroot, *of_node;
128
-
129
-
node_vroot = find_devices("vdevice");
130
-
if ((node_vroot == NULL) || (node_vroot->child == NULL))
131
-
/* this machine doesn't do virtual IO, and that's ok */
132
-
return;
133
-
134
-
vio_num_address_cells = prom_n_addr_cells(node_vroot->child);
135
-
136
-
/*
137
-
* Create struct vio_devices for each virtual device in the device tree.
138
-
* Drivers will associate with them later.
139
-
*/
140
-
for (of_node = node_vroot->child; of_node != NULL;
141
-
of_node = of_node->sibling) {
142
-
printk(KERN_DEBUG "%s: processing %p\n", __FUNCTION__, of_node);
143
-
vio_register_device_node(of_node);
144
-
}
145
-
}
146
-
#endif
147
-
148
140
/**
149
141
* vio_bus_init: - Initialize the virtual IO bus
150
142
*/
151
143
int __init vio_bus_init(int (*match_func)(const struct vio_device_id *id,
152
-
const struct vio_dev *dev))
144
+
const struct vio_dev *dev),
145
+
void (*unregister_dev)(struct vio_dev *),
146
+
void (*release_dev)(struct device *))
153
147
{
154
148
int err;
155
149
156
150
is_match = match_func;
151
+
unregister_device_callback = unregister_dev;
152
+
release_device_callback = release_dev;
157
153
158
154
err = bus_register(&vio_bus_type);
159
155
if (err) {
···
154
190
return 0;
155
191
}
156
192
157
-
#ifdef CONFIG_PPC_PSERIES
158
-
/**
159
-
* vio_match_device_pseries: - Tell if a pSeries VIO device matches a
160
-
* vio_device_id
161
-
*/
162
-
static int vio_match_device_pseries(const struct vio_device_id *id,
163
-
const struct vio_dev *dev)
164
-
{
165
-
return (strncmp(dev->type, id->type, strlen(id->type)) == 0) &&
166
-
device_is_compatible(dev->dev.platform_data, id->compat);
167
-
}
168
-
169
-
/**
170
-
* vio_bus_init_pseries: - Initialize the pSeries virtual IO bus
171
-
*/
172
-
static int __init vio_bus_init_pseries(void)
173
-
{
174
-
int err;
175
-
176
-
err = vio_bus_init(vio_match_device_pseries);
177
-
if (err == 0)
178
-
probe_bus_pseries();
179
-
return err;
180
-
}
181
-
182
-
__initcall(vio_bus_init_pseries);
183
-
#endif
184
-
185
193
/* vio_dev refcount hit 0 */
186
194
static void __devinit vio_dev_release(struct device *dev)
187
195
{
188
-
DBGENTER();
189
-
190
-
#ifdef CONFIG_PPC_PSERIES
191
-
/* XXX free TCE table */
192
-
of_node_put(dev->platform_data);
193
-
#endif
196
+
if (release_device_callback)
197
+
release_device_callback(dev);
194
198
kfree(to_vio_dev(dev));
195
199
}
196
-
197
-
#ifdef CONFIG_PPC_PSERIES
198
-
static ssize_t viodev_show_devspec(struct device *dev, struct device_attribute *attr, char *buf)
199
-
{
200
-
struct device_node *of_node = dev->platform_data;
201
-
202
-
return sprintf(buf, "%s\n", of_node->full_name);
203
-
}
204
-
DEVICE_ATTR(devspec, S_IRUSR | S_IRGRP | S_IROTH, viodev_show_devspec, NULL);
205
-
#endif
206
200
207
201
static ssize_t viodev_show_name(struct device *dev, struct device_attribute *attr, char *buf)
208
202
{
···
172
250
struct vio_dev *viodev, char *name, char *type,
173
251
uint32_t unit_address, struct iommu_table *iommu_table)
174
252
{
175
-
DBGENTER();
176
-
177
253
viodev->name = name;
178
254
viodev->type = type;
179
255
viodev->unit_address = unit_address;
···
192
272
return viodev;
193
273
}
194
274
195
-
#ifdef CONFIG_PPC_PSERIES
196
-
/**
197
-
* vio_register_device_node: - Register a new vio device.
198
-
* @of_node: The OF node for this device.
199
-
*
200
-
* Creates and initializes a vio_dev structure from the data in
201
-
* of_node (dev.platform_data) and adds it to the list of virtual devices.
202
-
* Returns a pointer to the created vio_dev or NULL if node has
203
-
* NULL device_type or compatible fields.
204
-
*/
205
-
struct vio_dev * __devinit vio_register_device_node(struct device_node *of_node)
206
-
{
207
-
struct vio_dev *viodev;
208
-
unsigned int *unit_address;
209
-
unsigned int *irq_p;
210
-
211
-
DBGENTER();
212
-
213
-
/* we need the 'device_type' property, in order to match with drivers */
214
-
if ((NULL == of_node->type)) {
215
-
printk(KERN_WARNING
216
-
"%s: node %s missing 'device_type'\n", __FUNCTION__,
217
-
of_node->name ? of_node->name : "<unknown>");
218
-
return NULL;
219
-
}
220
-
221
-
unit_address = (unsigned int *)get_property(of_node, "reg", NULL);
222
-
if (!unit_address) {
223
-
printk(KERN_WARNING "%s: node %s missing 'reg'\n", __FUNCTION__,
224
-
of_node->name ? of_node->name : "<unknown>");
225
-
return NULL;
226
-
}
227
-
228
-
/* allocate a vio_dev for this node */
229
-
viodev = kmalloc(sizeof(struct vio_dev), GFP_KERNEL);
230
-
if (!viodev) {
231
-
return NULL;
232
-
}
233
-
memset(viodev, 0, sizeof(struct vio_dev));
234
-
235
-
viodev->dev.platform_data = of_node_get(of_node);
236
-
237
-
viodev->irq = NO_IRQ;
238
-
irq_p = (unsigned int *)get_property(of_node, "interrupts", NULL);
239
-
if (irq_p) {
240
-
int virq = virt_irq_create_mapping(*irq_p);
241
-
if (virq == NO_IRQ) {
242
-
printk(KERN_ERR "Unable to allocate interrupt "
243
-
"number for %s\n", of_node->full_name);
244
-
} else
245
-
viodev->irq = irq_offset_up(virq);
246
-
}
247
-
248
-
snprintf(viodev->dev.bus_id, BUS_ID_SIZE, "%x", *unit_address);
249
-
250
-
/* register with generic device framework */
251
-
if (vio_register_device_common(viodev, of_node->name, of_node->type,
252
-
*unit_address, vio_build_iommu_table(viodev))
253
-
== NULL) {
254
-
/* XXX free TCE table */
255
-
kfree(viodev);
256
-
return NULL;
257
-
}
258
-
device_create_file(&viodev->dev, &dev_attr_devspec);
259
-
260
-
return viodev;
261
-
}
262
-
EXPORT_SYMBOL(vio_register_device_node);
263
-
#endif
264
-
265
275
void __devinit vio_unregister_device(struct vio_dev *viodev)
266
276
{
267
-
DBGENTER();
268
-
#ifdef CONFIG_PPC_PSERIES
269
-
device_remove_file(&viodev->dev, &dev_attr_devspec);
270
-
#endif
277
+
if (unregister_device_callback)
278
+
unregister_device_callback(viodev);
271
279
device_remove_file(&viodev->dev, &dev_attr_name);
272
280
device_unregister(&viodev->dev);
273
281
}
274
282
EXPORT_SYMBOL(vio_unregister_device);
275
-
276
-
#ifdef CONFIG_PPC_PSERIES
277
-
/**
278
-
* vio_get_attribute: - get attribute for virtual device
279
-
* @vdev: The vio device to get property.
280
-
* @which: The property/attribute to be extracted.
281
-
* @length: Pointer to length of returned data size (unused if NULL).
282
-
*
283
-
* Calls prom.c's get_property() to return the value of the
284
-
* attribute specified by the preprocessor constant @which
285
-
*/
286
-
const void * vio_get_attribute(struct vio_dev *vdev, void* which, int* length)
287
-
{
288
-
return get_property(vdev->dev.platform_data, (char*)which, length);
289
-
}
290
-
EXPORT_SYMBOL(vio_get_attribute);
291
-
292
-
/* vio_find_name() - internal because only vio.c knows how we formatted the
293
-
* kobject name
294
-
* XXX once vio_bus_type.devices is actually used as a kset in
295
-
* drivers/base/bus.c, this function should be removed in favor of
296
-
* "device_find(kobj_name, &vio_bus_type)"
297
-
*/
298
-
static struct vio_dev *vio_find_name(const char *kobj_name)
299
-
{
300
-
struct kobject *found;
301
-
302
-
found = kset_find_obj(&devices_subsys.kset, kobj_name);
303
-
if (!found)
304
-
return NULL;
305
-
306
-
return to_vio_dev(container_of(found, struct device, kobj));
307
-
}
308
-
309
-
/**
310
-
* vio_find_node - find an already-registered vio_dev
311
-
* @vnode: device_node of the virtual device we're looking for
312
-
*/
313
-
struct vio_dev *vio_find_node(struct device_node *vnode)
314
-
{
315
-
uint32_t *unit_address;
316
-
char kobj_name[BUS_ID_SIZE];
317
-
318
-
/* construct the kobject name from the device node */
319
-
unit_address = (uint32_t *)get_property(vnode, "reg", NULL);
320
-
if (!unit_address)
321
-
return NULL;
322
-
snprintf(kobj_name, BUS_ID_SIZE, "%x", *unit_address);
323
-
324
-
return vio_find_name(kobj_name);
325
-
}
326
-
EXPORT_SYMBOL(vio_find_node);
327
-
328
-
/**
329
-
* vio_build_iommu_table: - gets the dma information from OF and builds the TCE tree.
330
-
* @dev: the virtual device.
331
-
*
332
-
* Returns a pointer to the built tce tree, or NULL if it can't
333
-
* find property.
334
-
*/
335
-
static struct iommu_table * vio_build_iommu_table(struct vio_dev *dev)
336
-
{
337
-
unsigned int *dma_window;
338
-
struct iommu_table *newTceTable;
339
-
unsigned long offset;
340
-
int dma_window_property_size;
341
-
342
-
dma_window = (unsigned int *) get_property(dev->dev.platform_data, "ibm,my-dma-window", &dma_window_property_size);
343
-
if(!dma_window) {
344
-
return NULL;
345
-
}
346
-
347
-
newTceTable = (struct iommu_table *) kmalloc(sizeof(struct iommu_table), GFP_KERNEL);
348
-
349
-
/* There should be some code to extract the phys-encoded offset
350
-
using prom_n_addr_cells(). However, according to a comment
351
-
on earlier versions, it's always zero, so we don't bother */
352
-
offset = dma_window[1] >> PAGE_SHIFT;
353
-
354
-
/* TCE table size - measured in tce entries */
355
-
newTceTable->it_size = dma_window[4] >> PAGE_SHIFT;
356
-
/* offset for VIO should always be 0 */
357
-
newTceTable->it_offset = offset;
358
-
newTceTable->it_busno = 0;
359
-
newTceTable->it_index = (unsigned long)dma_window[0];
360
-
newTceTable->it_type = TCE_VB;
361
-
362
-
return iommu_init_table(newTceTable);
363
-
}
364
-
365
-
int vio_enable_interrupts(struct vio_dev *dev)
366
-
{
367
-
int rc = h_vio_signal(dev->unit_address, VIO_IRQ_ENABLE);
368
-
if (rc != H_Success) {
369
-
printk(KERN_ERR "vio: Error 0x%x enabling interrupts\n", rc);
370
-
}
371
-
return rc;
372
-
}
373
-
EXPORT_SYMBOL(vio_enable_interrupts);
374
-
375
-
int vio_disable_interrupts(struct vio_dev *dev)
376
-
{
377
-
int rc = h_vio_signal(dev->unit_address, VIO_IRQ_DISABLE);
378
-
if (rc != H_Success) {
379
-
printk(KERN_ERR "vio: Error 0x%x disabling interrupts\n", rc);
380
-
}
381
-
return rc;
382
-
}
383
-
EXPORT_SYMBOL(vio_disable_interrupts);
384
-
#endif
385
283
386
284
static dma_addr_t vio_map_single(struct device *dev, void *vaddr,
387
285
size_t size, enum dma_data_direction direction)
···
263
525
struct vio_driver *vio_drv = to_vio_driver(drv);
264
526
const struct vio_device_id *ids = vio_drv->id_table;
265
527
const struct vio_device_id *found_id;
266
-
267
-
DBGENTER();
268
528
269
529
if (!ids)
270
530
return 0;
+3
-1
include/asm-ppc64/vio.h
+3
-1
include/asm-ppc64/vio.h