1 // SPDX-License-Identifier: GPL-2.0-only
3  * pSeries_reconfig.c - support for dynamic reconfiguration (including PCI
23 static int pSeries_reconfig_add_node(const char *path, struct property *proplist)  in pSeries_reconfig_add_node()
26 	int err = -ENOMEM;  in pSeries_reconfig_add_node()
32 	np->full_name = kstrdup(kbasename(path), GFP_KERNEL);  in pSeries_reconfig_add_node()
33 	if (!np->full_name)  in pSeries_reconfig_add_node()
36 	np->properties = proplist;  in pSeries_reconfig_add_node()
40 	np->parent = pseries_of_derive_parent(path);  in pSeries_reconfig_add_node()
41 	if (IS_ERR(np->parent)) {  in pSeries_reconfig_add_node()
42 		err = PTR_ERR(np->parent);  in pSeries_reconfig_add_node()
52 	of_node_put(np->parent);  in pSeries_reconfig_add_node()
58 		of_node_put(np->parent);  in pSeries_reconfig_add_node()
59 		kfree(np->full_name);  in pSeries_reconfig_add_node()
65 static int pSeries_reconfig_remove_node(struct device_node *np)  in pSeries_reconfig_remove_node()
71 		return -EINVAL;  in pSeries_reconfig_remove_node()
76 		return -EBUSY;  in pSeries_reconfig_remove_node()
85  * /proc/powerpc/ofdt - yucky binary interface for adding and removing
87  * in-kernel wrapper for the RTAS ibm,configure-connector call.
90 static void release_prop_list(const struct property *prop)  in release_prop_list()
92 	struct property *next;  in release_prop_list()
94 		next = prop->next;  in release_prop_list()
95 		kfree(prop->name);  in release_prop_list()
96 		kfree(prop->value);  in release_prop_list()
103  * parse_next_property - process the next property from raw input buffer
104  * @buf: input buffer, must be nul-terminated
106  * @name: return value; set to property name in buf
108  * @value: return value; set to the property value in buf
114 static char * parse_next_property(char *buf, char *end, char **name, int *length,  in parse_next_property()
123 		printk(KERN_ERR "property parse failed in %s at line %d\n",  in parse_next_property()
130 		printk(KERN_ERR "property parse failed in %s at line %d\n",  in parse_next_property()
136 	*length = -1;  in parse_next_property()
138 	if (*length == -1) {  in parse_next_property()
139 		printk(KERN_ERR "property parse failed in %s at line %d\n",  in parse_next_property()
144 		printk(KERN_ERR "property parse failed in %s at line %d\n",  in parse_next_property()
153 		printk(KERN_ERR "property parse failed in %s at line %d\n",  in parse_next_property()
158 		printk(KERN_ERR "property parse failed in %s at line %d\n",  in parse_next_property()
168 static struct property *new_property(const char *name, const int length,  in new_property()
169 				     const unsigned char *value, struct property *last)  in new_property()
171 	struct property *new = kzalloc(sizeof(*new), GFP_KERNEL);  in new_property()
176 	if (!(new->name = kstrdup(name, GFP_KERNEL)))  in new_property()
178 	if (!(new->value = kmalloc(length + 1, GFP_KERNEL)))  in new_property()
181 	memcpy(new->value, value, length);  in new_property()
182 	*(((char *)new->value) + length) = 0;  in new_property()
183 	new->length = length;  in new_property()
184 	new->next = last;  in new_property()
188 	kfree(new->name);  in new_property()
189 	kfree(new->value);  in new_property()
194 static int do_add_node(char *buf, size_t bufsize)  in do_add_node()
198 	struct property *prop = NULL;  in do_add_node()
200 	int length, rv = 0;  in do_add_node()
206 		return -EINVAL;  in do_add_node()
212 		return -EINVAL;  in do_add_node()
215 	/* rv = build_prop_list(tmp, bufsize - (tmp - buf), &proplist); */  in do_add_node()
218 		struct property *last = prop;  in do_add_node()
222 			rv = -ENOMEM;  in do_add_node()
228 		rv = -EINVAL;  in do_add_node()
240 static int do_remove_node(char *buf)  in do_remove_node()
243 	int rv = -ENODEV;  in do_remove_node()
272 static int do_add_property(char *buf, size_t bufsize)  in do_add_property()
274 	struct property *prop = NULL;  in do_add_property()
278 	int length;  in do_add_property()
283 		return -ENODEV;  in do_add_property()
286 		return -EINVAL;  in do_add_property()
290 		return -ENOMEM;  in do_add_property()
297 static int do_remove_property(char *buf, size_t bufsize)  in do_remove_property()
304 		return -ENODEV;  in do_remove_property()
311 		return -EINVAL;  in do_remove_property()
316 static int do_update_property(char *buf, size_t bufsize)  in do_update_property()
321 	int length;  in do_update_property()
322 	struct property *newprop;  in do_update_property()
327 		return -ENODEV;  in do_update_property()
331 		return -EINVAL;  in do_update_property()
334 		return -ENODEV;  in do_update_property()
338 		return -ENOMEM;  in do_update_property()
340 	if (!strcmp(name, "slb-size") || !strcmp(name, "ibm,slb-size"))  in do_update_property()
341 		slb_set_size(*(int *)value);  in do_update_property()
347  * ofdt_write - perform operations on the Open Firmware device tree
361 	int rv;  in ofdt_write()
375 		rv = -EINVAL;  in ofdt_write()
382 		rv = do_add_node(tmp, count - (tmp - kbuf));  in ofdt_write()
386 		rv = do_add_property(tmp, count - (tmp - kbuf));  in ofdt_write()
388 		rv = do_remove_property(tmp, count - (tmp - kbuf));  in ofdt_write()
390 		rv = do_update_property(tmp, count - (tmp - kbuf));  in ofdt_write()
392 		rv = -EINVAL;  in ofdt_write()
403 /* create /proc/powerpc/ofdt write-only by root */
404 static int proc_ppc64_create_ofdt(void)  in proc_ppc64_create_ofdt()