1 /* vio.c: Virtual I/O channel devices probing infrastructure.
3 * Copyright (c) 2003-2005 IBM Corp.
4 * Dave Engebretsen engebret@us.ibm.com
5 * Santiago Leon santil@us.ibm.com
6 * Hollis Blanchard <hollisb@us.ibm.com>
9 * Adapted to sparc64 by David S. Miller davem@davemloft.net
12 #include <linux/kernel.h>
13 #include <linux/irq.h>
14 #include <linux/init.h>
16 #include <asm/mdesc.h>
19 static inline int find_in_proplist(const char *list, const char *match,
25 if (!strcmp(list, match))
34 static const struct vio_device_id *vio_match_device(
35 const struct vio_device_id *matches,
36 const struct vio_dev *dev)
38 const char *type, *compat;
43 len = dev->compat_len;
45 while (matches->type[0] || matches->compat[0]) {
48 match &= !strcmp(matches->type, type);
50 if (matches->compat[0]) {
52 find_in_proplist(compat, matches->compat, len);
61 static int vio_bus_match(struct device *dev, struct device_driver *drv)
63 struct vio_dev *vio_dev = to_vio_dev(dev);
64 struct vio_driver *vio_drv = to_vio_driver(drv);
65 const struct vio_device_id *matches = vio_drv->id_table;
70 return vio_match_device(matches, vio_dev) != NULL;
73 static int vio_device_probe(struct device *dev)
75 struct vio_dev *vdev = to_vio_dev(dev);
76 struct vio_driver *drv = to_vio_driver(dev->driver);
77 const struct vio_device_id *id;
81 id = vio_match_device(drv->id_table, vdev);
83 error = drv->probe(vdev, id);
89 static int vio_device_remove(struct device *dev)
91 struct vio_dev *vdev = to_vio_dev(dev);
92 struct vio_driver *drv = to_vio_driver(dev->driver);
95 return drv->remove(vdev);
100 static ssize_t devspec_show(struct device *dev,
101 struct device_attribute *attr, char *buf)
103 struct vio_dev *vdev = to_vio_dev(dev);
104 const char *str = "none";
106 if (!strcmp(vdev->type, "vnet-port"))
108 else if (!strcmp(vdev->type, "vdc-port"))
111 return sprintf(buf, "%s\n", str);
114 static ssize_t type_show(struct device *dev,
115 struct device_attribute *attr, char *buf)
117 struct vio_dev *vdev = to_vio_dev(dev);
118 return sprintf(buf, "%s\n", vdev->type);
121 static struct device_attribute vio_dev_attrs[] = {
127 static struct bus_type vio_bus_type = {
129 .dev_attrs = vio_dev_attrs,
130 .match = vio_bus_match,
131 .probe = vio_device_probe,
132 .remove = vio_device_remove,
135 int vio_register_driver(struct vio_driver *viodrv)
137 viodrv->driver.bus = &vio_bus_type;
139 return driver_register(&viodrv->driver);
141 EXPORT_SYMBOL(vio_register_driver);
143 void vio_unregister_driver(struct vio_driver *viodrv)
145 driver_unregister(&viodrv->driver);
147 EXPORT_SYMBOL(vio_unregister_driver);
149 static void __devinit vio_dev_release(struct device *dev)
151 kfree(to_vio_dev(dev));
155 show_pciobppath_attr(struct device *dev, struct device_attribute *attr,
158 struct vio_dev *vdev;
159 struct device_node *dp;
161 vdev = to_vio_dev(dev);
164 return snprintf (buf, PAGE_SIZE, "%s\n", dp->full_name);
167 static DEVICE_ATTR(obppath, S_IRUSR | S_IRGRP | S_IROTH,
168 show_pciobppath_attr, NULL);
170 struct device_node *cdev_node;
172 static struct vio_dev *root_vdev;
173 static u64 cdev_cfg_handle;
175 static void vio_fill_channel_info(struct mdesc_handle *hp, u64 mp,
176 struct vio_dev *vdev)
180 mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_FWD) {
185 target = mdesc_arc_target(hp, a);
187 irq = mdesc_get_property(hp, target, "tx-ino", NULL);
189 vdev->tx_irq = sun4v_build_virq(cdev_cfg_handle, *irq);
191 irq = mdesc_get_property(hp, target, "rx-ino", NULL);
193 vdev->rx_irq = sun4v_build_virq(cdev_cfg_handle, *irq);
195 chan_id = mdesc_get_property(hp, target, "id", NULL);
197 vdev->channel_id = *chan_id;
201 static struct vio_dev *vio_create_one(struct mdesc_handle *hp, u64 mp,
202 struct device *parent)
204 const char *type, *compat, *bus_id_name;
205 struct device_node *dp;
206 struct vio_dev *vdev;
210 type = mdesc_get_property(hp, mp, "device-type", &tlen);
212 type = mdesc_get_property(hp, mp, "name", &tlen);
214 type = mdesc_node_name(hp, mp);
215 tlen = strlen(type) + 1;
218 if (tlen > VIO_MAX_TYPE_LEN) {
219 printk(KERN_ERR "VIO: Type string [%s] is too long.\n",
224 if (!strcmp(type, "vdc-port")) {
228 mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_BACK) {
231 target = mdesc_arc_target(hp, a);
232 id = mdesc_get_property(hp, target,
238 printk(KERN_ERR "VIO: vdc-port lacks parent "
243 id = mdesc_get_property(hp, mp, "id", NULL);
246 if (!strcmp(type, "domain-services-port"))
249 if (strlen(bus_id_name) >= KOBJ_NAME_LEN - 4) {
250 printk(KERN_ERR "VIO: bus_id_name [%s] is too long.\n",
255 compat = mdesc_get_property(hp, mp, "device-type", &clen);
258 } else if (clen > VIO_MAX_COMPAT_LEN) {
259 printk(KERN_ERR "VIO: Compat len %d for [%s] is too long.\n",
264 vdev = kzalloc(sizeof(*vdev), GFP_KERNEL);
266 printk(KERN_ERR "VIO: Could not allocate vio_dev\n");
271 memcpy(vdev->type, type, tlen);
273 memcpy(vdev->compat, compat, clen);
275 memset(vdev->compat, 0, sizeof(vdev->compat));
276 vdev->compat_len = clen;
278 vdev->channel_id = ~0UL;
282 vio_fill_channel_info(hp, mp, vdev);
285 snprintf(vdev->dev.bus_id, BUS_ID_SIZE, "%s",
287 vdev->dev_no = ~(u64)0;
289 snprintf(vdev->dev.bus_id, BUS_ID_SIZE, "%s-%lu",
294 vdev->dev.parent = parent;
295 vdev->dev.bus = &vio_bus_type;
296 vdev->dev.release = vio_dev_release;
298 if (parent == NULL) {
300 } else if (to_vio_dev(parent) == root_vdev) {
301 dp = of_get_next_child(cdev_node, NULL);
303 if (!strcmp(dp->type, type))
306 dp = of_get_next_child(cdev_node, dp);
309 dp = to_vio_dev(parent)->dp;
313 printk(KERN_ERR "VIO: Adding device %s\n", vdev->dev.bus_id);
315 err = device_register(&vdev->dev);
317 printk(KERN_ERR "VIO: Could not register device %s, err=%d\n",
318 vdev->dev.bus_id, err);
323 err = sysfs_create_file(&vdev->dev.kobj,
324 &dev_attr_obppath.attr);
329 static void vio_add(struct mdesc_handle *hp, u64 node)
331 (void) vio_create_one(hp, node, &root_vdev->dev);
334 static int vio_md_node_match(struct device *dev, void *arg)
336 struct vio_dev *vdev = to_vio_dev(dev);
338 if (vdev->mp == (u64) arg)
344 static void vio_remove(struct mdesc_handle *hp, u64 node)
348 dev = device_find_child(&root_vdev->dev, (void *) node,
351 printk(KERN_INFO "VIO: Removing device %s\n", dev->bus_id);
353 device_unregister(dev);
357 static struct mdesc_notifier_client vio_device_notifier = {
359 .remove = vio_remove,
360 .node_name = "virtual-device-port",
363 static struct mdesc_notifier_client vio_ds_notifier = {
365 .remove = vio_remove,
366 .node_name = "domain-services-port",
369 const char *channel_devices_node = "channel-devices";
370 const char *channel_devices_compat = "SUNW,sun4v-channel-devices";
371 const char *cfg_handle_prop = "cfg-handle";
373 static int __init vio_init(void)
375 struct mdesc_handle *hp;
377 const u64 *cfg_handle;
381 err = bus_register(&vio_bus_type);
383 printk(KERN_ERR "VIO: Could not register bus type err=%d\n",
392 root = mdesc_node_by_name(hp, MDESC_NODE_NULL, channel_devices_node);
393 if (root == MDESC_NODE_NULL) {
394 printk(KERN_INFO "VIO: No channel-devices MDESC node.\n");
399 cdev_node = of_find_node_by_name(NULL, "channel-devices");
402 printk(KERN_INFO "VIO: No channel-devices OBP node.\n");
406 compat = mdesc_get_property(hp, root, "compatible", &len);
408 printk(KERN_ERR "VIO: Channel devices lacks compatible "
412 if (!find_in_proplist(compat, channel_devices_compat, len)) {
413 printk(KERN_ERR "VIO: Channel devices node lacks (%s) "
414 "compat entry.\n", channel_devices_compat);
418 cfg_handle = mdesc_get_property(hp, root, cfg_handle_prop, NULL);
420 printk(KERN_ERR "VIO: Channel devices lacks %s property\n",
425 cdev_cfg_handle = *cfg_handle;
427 root_vdev = vio_create_one(hp, root, NULL);
430 printk(KERN_ERR "VIO: Coult not create root device.\n");
434 mdesc_register_notifier(&vio_device_notifier);
435 mdesc_register_notifier(&vio_ds_notifier);
446 postcore_initcall(vio_init);