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12#include <linux/kernel.h>
13#include <linux/slab.h>
14#include <linux/irq.h>
15#include <linux/export.h>
16#include <linux/init.h>
17
18#include <asm/mdesc.h>
19#include <asm/vio.h>
20
21static const struct vio_device_id *vio_match_device(
22 const struct vio_device_id *matches,
23 const struct vio_dev *dev)
24{
25 const char *type, *compat;
26 int len;
27
28 type = dev->type;
29 compat = dev->compat;
30 len = dev->compat_len;
31
32 while (matches->type[0] || matches->compat[0]) {
33 int match = 1;
34 if (matches->type[0])
35 match &= !strcmp(matches->type, type);
36
37 if (matches->compat[0]) {
38 match &= len &&
39 of_find_in_proplist(compat, matches->compat, len);
40 }
41 if (match)
42 return matches;
43 matches++;
44 }
45 return NULL;
46}
47
48static int vio_bus_match(struct device *dev, struct device_driver *drv)
49{
50 struct vio_dev *vio_dev = to_vio_dev(dev);
51 struct vio_driver *vio_drv = to_vio_driver(drv);
52 const struct vio_device_id *matches = vio_drv->id_table;
53
54 if (!matches)
55 return 0;
56
57 return vio_match_device(matches, vio_dev) != NULL;
58}
59
60static int vio_device_probe(struct device *dev)
61{
62 struct vio_dev *vdev = to_vio_dev(dev);
63 struct vio_driver *drv = to_vio_driver(dev->driver);
64 const struct vio_device_id *id;
65 int error = -ENODEV;
66
67 if (drv->probe) {
68 id = vio_match_device(drv->id_table, vdev);
69 if (id)
70 error = drv->probe(vdev, id);
71 }
72
73 return error;
74}
75
76static int vio_device_remove(struct device *dev)
77{
78 struct vio_dev *vdev = to_vio_dev(dev);
79 struct vio_driver *drv = to_vio_driver(dev->driver);
80
81 if (drv->remove)
82 return drv->remove(vdev);
83
84 return 1;
85}
86
87static ssize_t devspec_show(struct device *dev,
88 struct device_attribute *attr, char *buf)
89{
90 struct vio_dev *vdev = to_vio_dev(dev);
91 const char *str = "none";
92
93 if (!strcmp(vdev->type, "vnet-port"))
94 str = "vnet";
95 else if (!strcmp(vdev->type, "vdc-port"))
96 str = "vdisk";
97
98 return sprintf(buf, "%s\n", str);
99}
100
101static ssize_t type_show(struct device *dev,
102 struct device_attribute *attr, char *buf)
103{
104 struct vio_dev *vdev = to_vio_dev(dev);
105 return sprintf(buf, "%s\n", vdev->type);
106}
107
108static struct device_attribute vio_dev_attrs[] = {
109 __ATTR_RO(devspec),
110 __ATTR_RO(type),
111 __ATTR_NULL
112};
113
114static struct bus_type vio_bus_type = {
115 .name = "vio",
116 .dev_attrs = vio_dev_attrs,
117 .match = vio_bus_match,
118 .probe = vio_device_probe,
119 .remove = vio_device_remove,
120};
121
122int __vio_register_driver(struct vio_driver *viodrv, struct module *owner,
123 const char *mod_name)
124{
125 viodrv->driver.bus = &vio_bus_type;
126 viodrv->driver.name = viodrv->name;
127 viodrv->driver.owner = owner;
128 viodrv->driver.mod_name = mod_name;
129
130 return driver_register(&viodrv->driver);
131}
132EXPORT_SYMBOL(__vio_register_driver);
133
134void vio_unregister_driver(struct vio_driver *viodrv)
135{
136 driver_unregister(&viodrv->driver);
137}
138EXPORT_SYMBOL(vio_unregister_driver);
139
140static void vio_dev_release(struct device *dev)
141{
142 kfree(to_vio_dev(dev));
143}
144
145static ssize_t
146show_pciobppath_attr(struct device *dev, struct device_attribute *attr,
147 char *buf)
148{
149 struct vio_dev *vdev;
150 struct device_node *dp;
151
152 vdev = to_vio_dev(dev);
153 dp = vdev->dp;
154
155 return snprintf (buf, PAGE_SIZE, "%s\n", dp->full_name);
156}
157
158static DEVICE_ATTR(obppath, S_IRUSR | S_IRGRP | S_IROTH,
159 show_pciobppath_attr, NULL);
160
161static struct device_node *cdev_node;
162
163static struct vio_dev *root_vdev;
164static u64 cdev_cfg_handle;
165
166static void vio_fill_channel_info(struct mdesc_handle *hp, u64 mp,
167 struct vio_dev *vdev)
168{
169 u64 a;
170
171 mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_FWD) {
172 const u64 *chan_id;
173 const u64 *irq;
174 u64 target;
175
176 target = mdesc_arc_target(hp, a);
177
178 irq = mdesc_get_property(hp, target, "tx-ino", NULL);
179 if (irq)
180 vdev->tx_irq = sun4v_build_virq(cdev_cfg_handle, *irq);
181
182 irq = mdesc_get_property(hp, target, "rx-ino", NULL);
183 if (irq) {
184 vdev->rx_irq = sun4v_build_virq(cdev_cfg_handle, *irq);
185 vdev->rx_ino = *irq;
186 }
187
188 chan_id = mdesc_get_property(hp, target, "id", NULL);
189 if (chan_id)
190 vdev->channel_id = *chan_id;
191 }
192}
193
194int vio_set_intr(unsigned long dev_ino, int state)
195{
196 int err;
197
198 err = sun4v_vintr_set_valid(cdev_cfg_handle, dev_ino, state);
199 return err;
200}
201EXPORT_SYMBOL(vio_set_intr);
202
203static struct vio_dev *vio_create_one(struct mdesc_handle *hp, u64 mp,
204 struct device *parent)
205{
206 const char *type, *compat, *bus_id_name;
207 struct device_node *dp;
208 struct vio_dev *vdev;
209 int err, tlen, clen;
210 const u64 *id, *cfg_handle;
211 u64 a;
212
213 type = mdesc_get_property(hp, mp, "device-type", &tlen);
214 if (!type) {
215 type = mdesc_get_property(hp, mp, "name", &tlen);
216 if (!type) {
217 type = mdesc_node_name(hp, mp);
218 tlen = strlen(type) + 1;
219 }
220 }
221 if (tlen > VIO_MAX_TYPE_LEN) {
222 printk(KERN_ERR "VIO: Type string [%s] is too long.\n",
223 type);
224 return NULL;
225 }
226
227 id = mdesc_get_property(hp, mp, "id", NULL);
228
229 cfg_handle = NULL;
230 mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_BACK) {
231 u64 target;
232
233 target = mdesc_arc_target(hp, a);
234 cfg_handle = mdesc_get_property(hp, target,
235 "cfg-handle", NULL);
236 if (cfg_handle)
237 break;
238 }
239
240 bus_id_name = type;
241 if (!strcmp(type, "domain-services-port"))
242 bus_id_name = "ds";
243
244
245
246
247
248
249 if (strlen(bus_id_name) >= 20 - 4) {
250 printk(KERN_ERR "VIO: bus_id_name [%s] is too long.\n",
251 bus_id_name);
252 return NULL;
253 }
254
255 compat = mdesc_get_property(hp, mp, "device-type", &clen);
256 if (!compat) {
257 clen = 0;
258 } else if (clen > VIO_MAX_COMPAT_LEN) {
259 printk(KERN_ERR "VIO: Compat len %d for [%s] is too long.\n",
260 clen, type);
261 return NULL;
262 }
263
264 vdev = kzalloc(sizeof(*vdev), GFP_KERNEL);
265 if (!vdev) {
266 printk(KERN_ERR "VIO: Could not allocate vio_dev\n");
267 return NULL;
268 }
269
270 vdev->mp = mp;
271 memcpy(vdev->type, type, tlen);
272 if (compat)
273 memcpy(vdev->compat, compat, clen);
274 else
275 memset(vdev->compat, 0, sizeof(vdev->compat));
276 vdev->compat_len = clen;
277
278 vdev->channel_id = ~0UL;
279 vdev->tx_irq = ~0;
280 vdev->rx_irq = ~0;
281
282 vio_fill_channel_info(hp, mp, vdev);
283
284 if (!id) {
285 dev_set_name(&vdev->dev, "%s", bus_id_name);
286 vdev->dev_no = ~(u64)0;
287 } else if (!cfg_handle) {
288 dev_set_name(&vdev->dev, "%s-%llu", bus_id_name, *id);
289 vdev->dev_no = *id;
290 } else {
291 dev_set_name(&vdev->dev, "%s-%llu-%llu", bus_id_name,
292 *cfg_handle, *id);
293 vdev->dev_no = *cfg_handle;
294 }
295
296 vdev->dev.parent = parent;
297 vdev->dev.bus = &vio_bus_type;
298 vdev->dev.release = vio_dev_release;
299
300 if (parent == NULL) {
301 dp = cdev_node;
302 } else if (to_vio_dev(parent) == root_vdev) {
303 dp = of_get_next_child(cdev_node, NULL);
304 while (dp) {
305 if (!strcmp(dp->type, type))
306 break;
307
308 dp = of_get_next_child(cdev_node, dp);
309 }
310 } else {
311 dp = to_vio_dev(parent)->dp;
312 }
313 vdev->dp = dp;
314
315 printk(KERN_INFO "VIO: Adding device %s\n", dev_name(&vdev->dev));
316
317 err = device_register(&vdev->dev);
318 if (err) {
319 printk(KERN_ERR "VIO: Could not register device %s, err=%d\n",
320 dev_name(&vdev->dev), err);
321 kfree(vdev);
322 return NULL;
323 }
324 if (vdev->dp)
325 err = sysfs_create_file(&vdev->dev.kobj,
326 &dev_attr_obppath.attr);
327
328 return vdev;
329}
330
331static void vio_add(struct mdesc_handle *hp, u64 node)
332{
333 (void) vio_create_one(hp, node, &root_vdev->dev);
334}
335
336static int vio_md_node_match(struct device *dev, void *arg)
337{
338 struct vio_dev *vdev = to_vio_dev(dev);
339
340 if (vdev->mp == (u64) arg)
341 return 1;
342
343 return 0;
344}
345
346static void vio_remove(struct mdesc_handle *hp, u64 node)
347{
348 struct device *dev;
349
350 dev = device_find_child(&root_vdev->dev, (void *) node,
351 vio_md_node_match);
352 if (dev) {
353 printk(KERN_INFO "VIO: Removing device %s\n", dev_name(dev));
354
355 device_unregister(dev);
356 put_device(dev);
357 }
358}
359
360static struct mdesc_notifier_client vio_device_notifier = {
361 .add = vio_add,
362 .remove = vio_remove,
363 .node_name = "virtual-device-port",
364};
365
366
367
368
369
370
371static void vio_add_ds(struct mdesc_handle *hp, u64 node)
372{
373 int found;
374 u64 a;
375
376 found = 0;
377 mdesc_for_each_arc(a, hp, node, MDESC_ARC_TYPE_BACK) {
378 u64 target = mdesc_arc_target(hp, a);
379 const char *name = mdesc_node_name(hp, target);
380
381 if (!strcmp(name, "domain-services")) {
382 found = 1;
383 break;
384 }
385 }
386
387 if (found)
388 (void) vio_create_one(hp, node, &root_vdev->dev);
389}
390
391static struct mdesc_notifier_client vio_ds_notifier = {
392 .add = vio_add_ds,
393 .remove = vio_remove,
394 .node_name = "domain-services-port",
395};
396
397static const char *channel_devices_node = "channel-devices";
398static const char *channel_devices_compat = "SUNW,sun4v-channel-devices";
399static const char *cfg_handle_prop = "cfg-handle";
400
401static int __init vio_init(void)
402{
403 struct mdesc_handle *hp;
404 const char *compat;
405 const u64 *cfg_handle;
406 int err, len;
407 u64 root;
408
409 err = bus_register(&vio_bus_type);
410 if (err) {
411 printk(KERN_ERR "VIO: Could not register bus type err=%d\n",
412 err);
413 return err;
414 }
415
416 hp = mdesc_grab();
417 if (!hp)
418 return 0;
419
420 root = mdesc_node_by_name(hp, MDESC_NODE_NULL, channel_devices_node);
421 if (root == MDESC_NODE_NULL) {
422 printk(KERN_INFO "VIO: No channel-devices MDESC node.\n");
423 mdesc_release(hp);
424 return 0;
425 }
426
427 cdev_node = of_find_node_by_name(NULL, "channel-devices");
428 err = -ENODEV;
429 if (!cdev_node) {
430 printk(KERN_INFO "VIO: No channel-devices OBP node.\n");
431 goto out_release;
432 }
433
434 compat = mdesc_get_property(hp, root, "compatible", &len);
435 if (!compat) {
436 printk(KERN_ERR "VIO: Channel devices lacks compatible "
437 "property\n");
438 goto out_release;
439 }
440 if (!of_find_in_proplist(compat, channel_devices_compat, len)) {
441 printk(KERN_ERR "VIO: Channel devices node lacks (%s) "
442 "compat entry.\n", channel_devices_compat);
443 goto out_release;
444 }
445
446 cfg_handle = mdesc_get_property(hp, root, cfg_handle_prop, NULL);
447 if (!cfg_handle) {
448 printk(KERN_ERR "VIO: Channel devices lacks %s property\n",
449 cfg_handle_prop);
450 goto out_release;
451 }
452
453 cdev_cfg_handle = *cfg_handle;
454
455 root_vdev = vio_create_one(hp, root, NULL);
456 err = -ENODEV;
457 if (!root_vdev) {
458 printk(KERN_ERR "VIO: Could not create root device.\n");
459 goto out_release;
460 }
461
462 mdesc_register_notifier(&vio_device_notifier);
463 mdesc_register_notifier(&vio_ds_notifier);
464
465 mdesc_release(hp);
466
467 return err;
468
469out_release:
470 mdesc_release(hp);
471 return err;
472}
473
474postcore_initcall(vio_init);
475
