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1/*
2 * PCI Hot Plug Controller Driver for RPA-compliant PPC64 platform.
3 * Copyright (C) 2003 Linda Xie <lxie@us.ibm.com>
4 *
5 * All rights reserved.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or (at
10 * your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
15 * NON INFRINGEMENT. See the GNU General Public License for more
16 * details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 *
22 * Send feedback to <lxie@us.ibm.com>
23 *
24 */
25#include <linux/kernel.h>
26#include <linux/module.h>
27#include <linux/moduleparam.h>
28#include <linux/pci.h>
29#include <linux/pci_hotplug.h>
30#include <linux/smp.h>
31#include <linux/init.h>
32#include <linux/vmalloc.h>
33#include <asm/eeh.h> /* for eeh_add_device() */
34#include <asm/rtas.h> /* rtas_call */
35#include <asm/pci-bridge.h> /* for pci_controller */
36#include "../pci.h" /* for pci_add_new_bus */
37 /* and pci_do_scan_bus */
38#include "rpaphp.h"
39
40int rpaphp_debug;
41LIST_HEAD(rpaphp_slot_head);
42
43#define DRIVER_VERSION "0.1"
44#define DRIVER_AUTHOR "Linda Xie <lxie@us.ibm.com>"
45#define DRIVER_DESC "RPA HOT Plug PCI Controller Driver"
46
47#define MAX_LOC_CODE 128
48
49MODULE_AUTHOR(DRIVER_AUTHOR);
50MODULE_DESCRIPTION(DRIVER_DESC);
51MODULE_LICENSE("GPL");
52
53module_param_named(debug, rpaphp_debug, bool, 0644);
54
55/**
56 * set_attention_status - set attention LED
57 * @hotplug_slot: target &hotplug_slot
58 * @value: LED control value
59 *
60 * echo 0 > attention -- set LED OFF
61 * echo 1 > attention -- set LED ON
62 * echo 2 > attention -- set LED ID(identify, light is blinking)
63 */
64static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 value)
65{
66 int rc;
67 struct slot *slot = (struct slot *)hotplug_slot->private;
68
69 switch (value) {
70 case 0:
71 case 1:
72 case 2:
73 break;
74 default:
75 value = 1;
76 break;
77 }
78
79 rc = rtas_set_indicator(DR_INDICATOR, slot->index, value);
80 if (!rc)
81 hotplug_slot->info->attention_status = value;
82
83 return rc;
84}
85
86/**
87 * get_power_status - get power status of a slot
88 * @hotplug_slot: slot to get status
89 * @value: pointer to store status
90 */
91static int get_power_status(struct hotplug_slot *hotplug_slot, u8 * value)
92{
93 int retval, level;
94 struct slot *slot = (struct slot *)hotplug_slot->private;
95
96 retval = rtas_get_power_level (slot->power_domain, &level);
97 if (!retval)
98 *value = level;
99 return retval;
100}
101
102/**
103 * get_attention_status - get attention LED status
104 * @hotplug_slot: slot to get status
105 * @value: pointer to store status
106 */
107static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 * value)
108{
109 struct slot *slot = (struct slot *)hotplug_slot->private;
110 *value = slot->hotplug_slot->info->attention_status;
111 return 0;
112}
113
114static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 * value)
115{
116 struct slot *slot = (struct slot *)hotplug_slot->private;
117 int rc, state;
118
119 rc = rpaphp_get_sensor_state(slot, &state);
120
121 *value = NOT_VALID;
122 if (rc)
123 return rc;
124
125 if (state == EMPTY)
126 *value = EMPTY;
127 else if (state == PRESENT)
128 *value = slot->state;
129
130 return 0;
131}
132
133static enum pci_bus_speed get_max_bus_speed(struct slot *slot)
134{
135 enum pci_bus_speed speed;
136 switch (slot->type) {
137 case 1:
138 case 2:
139 case 3:
140 case 4:
141 case 5:
142 case 6:
143 speed = PCI_SPEED_33MHz; /* speed for case 1-6 */
144 break;
145 case 7:
146 case 8:
147 speed = PCI_SPEED_66MHz;
148 break;
149 case 11:
150 case 14:
151 speed = PCI_SPEED_66MHz_PCIX;
152 break;
153 case 12:
154 case 15:
155 speed = PCI_SPEED_100MHz_PCIX;
156 break;
157 case 13:
158 case 16:
159 speed = PCI_SPEED_133MHz_PCIX;
160 break;
161 default:
162 speed = PCI_SPEED_UNKNOWN;
163 break;
164 }
165
166 return speed;
167}
168
169static int get_children_props(struct device_node *dn, const int **drc_indexes,
170 const int **drc_names, const int **drc_types,
171 const int **drc_power_domains)
172{
173 const int *indexes, *names, *types, *domains;
174
175 indexes = of_get_property(dn, "ibm,drc-indexes", NULL);
176 names = of_get_property(dn, "ibm,drc-names", NULL);
177 types = of_get_property(dn, "ibm,drc-types", NULL);
178 domains = of_get_property(dn, "ibm,drc-power-domains", NULL);
179
180 if (!indexes || !names || !types || !domains) {
181 /* Slot does not have dynamically-removable children */
182 return -EINVAL;
183 }
184 if (drc_indexes)
185 *drc_indexes = indexes;
186 if (drc_names)
187 /* &drc_names[1] contains NULL terminated slot names */
188 *drc_names = names;
189 if (drc_types)
190 /* &drc_types[1] contains NULL terminated slot types */
191 *drc_types = types;
192 if (drc_power_domains)
193 *drc_power_domains = domains;
194
195 return 0;
196}
197
198/* To get the DRC props describing the current node, first obtain it's
199 * my-drc-index property. Next obtain the DRC list from it's parent. Use
200 * the my-drc-index for correlation, and obtain the requested properties.
201 */
202int rpaphp_get_drc_props(struct device_node *dn, int *drc_index,
203 char **drc_name, char **drc_type, int *drc_power_domain)
204{
205 const int *indexes, *names;
206 const int *types, *domains;
207 const unsigned int *my_index;
208 char *name_tmp, *type_tmp;
209 int i, rc;
210
211 my_index = of_get_property(dn, "ibm,my-drc-index", NULL);
212 if (!my_index) {
213 /* Node isn't DLPAR/hotplug capable */
214 return -EINVAL;
215 }
216
217 rc = get_children_props(dn->parent, &indexes, &names, &types, &domains);
218 if (rc < 0) {
219 return -EINVAL;
220 }
221
222 name_tmp = (char *) &names[1];
223 type_tmp = (char *) &types[1];
224
225 /* Iterate through parent properties, looking for my-drc-index */
226 for (i = 0; i < indexes[0]; i++) {
227 if ((unsigned int) indexes[i + 1] == *my_index) {
228 if (drc_name)
229 *drc_name = name_tmp;
230 if (drc_type)
231 *drc_type = type_tmp;
232 if (drc_index)
233 *drc_index = *my_index;
234 if (drc_power_domain)
235 *drc_power_domain = domains[i+1];
236 return 0;
237 }
238 name_tmp += (strlen(name_tmp) + 1);
239 type_tmp += (strlen(type_tmp) + 1);
240 }
241
242 return -EINVAL;
243}
244
245static int is_php_type(char *drc_type)
246{
247 unsigned long value;
248 char *endptr;
249
250 /* PCI Hotplug nodes have an integer for drc_type */
251 value = simple_strtoul(drc_type, &endptr, 10);
252 if (endptr == drc_type)
253 return 0;
254
255 return 1;
256}
257
258/**
259 * is_php_dn() - return 1 if this is a hotpluggable pci slot, else 0
260 * @dn: target &device_node
261 * @indexes: passed to get_children_props()
262 * @names: passed to get_children_props()
263 * @types: returned from get_children_props()
264 * @power_domains:
265 *
266 * This routine will return true only if the device node is
267 * a hotpluggable slot. This routine will return false
268 * for built-in pci slots (even when the built-in slots are
269 * dlparable.)
270 */
271static int is_php_dn(struct device_node *dn, const int **indexes,
272 const int **names, const int **types, const int **power_domains)
273{
274 const int *drc_types;
275 int rc;
276
277 rc = get_children_props(dn, indexes, names, &drc_types, power_domains);
278 if (rc < 0)
279 return 0;
280
281 if (!is_php_type((char *) &drc_types[1]))
282 return 0;
283
284 *types = drc_types;
285 return 1;
286}
287
288/**
289 * rpaphp_add_slot -- declare a hotplug slot to the hotplug subsystem.
290 * @dn: device node of slot
291 *
292 * This subroutine will register a hotplugable slot with the
293 * PCI hotplug infrastructure. This routine is typically called
294 * during boot time, if the hotplug slots are present at boot time,
295 * or is called later, by the dlpar add code, if the slot is
296 * being dynamically added during runtime.
297 *
298 * If the device node points at an embedded (built-in) slot, this
299 * routine will just return without doing anything, since embedded
300 * slots cannot be hotplugged.
301 *
302 * To remove a slot, it suffices to call rpaphp_deregister_slot().
303 */
304int rpaphp_add_slot(struct device_node *dn)
305{
306 struct slot *slot;
307 int retval = 0;
308 int i;
309 const int *indexes, *names, *types, *power_domains;
310 char *name, *type;
311
312 if (!dn->name || strcmp(dn->name, "pci"))
313 return 0;
314
315 /* If this is not a hotplug slot, return without doing anything. */
316 if (!is_php_dn(dn, &indexes, &names, &types, &power_domains))
317 return 0;
318
319 dbg("Entry %s: dn->full_name=%s\n", __func__, dn->full_name);
320
321 /* register PCI devices */
322 name = (char *) &names[1];
323 type = (char *) &types[1];
324 for (i = 0; i < indexes[0]; i++) {
325
326 slot = alloc_slot_struct(dn, indexes[i + 1], name, power_domains[i + 1]);
327 if (!slot)
328 return -ENOMEM;
329
330 slot->type = simple_strtoul(type, NULL, 10);
331
332 dbg("Found drc-index:0x%x drc-name:%s drc-type:%s\n",
333 indexes[i + 1], name, type);
334
335 retval = rpaphp_enable_slot(slot);
336 if (!retval)
337 retval = rpaphp_register_slot(slot);
338
339 if (retval)
340 dealloc_slot_struct(slot);
341
342 name += strlen(name) + 1;
343 type += strlen(type) + 1;
344 }
345 dbg("%s - Exit: rc[%d]\n", __func__, retval);
346
347 /* XXX FIXME: reports a failure only if last entry in loop failed */
348 return retval;
349}
350
351static void __exit cleanup_slots(void)
352{
353 struct list_head *tmp, *n;
354 struct slot *slot;
355
356 /*
357 * Unregister all of our slots with the pci_hotplug subsystem,
358 * and free up all memory that we had allocated.
359 * memory will be freed in release_slot callback.
360 */
361
362 list_for_each_safe(tmp, n, &rpaphp_slot_head) {
363 slot = list_entry(tmp, struct slot, rpaphp_slot_list);
364 list_del(&slot->rpaphp_slot_list);
365 pci_hp_deregister(slot->hotplug_slot);
366 }
367 return;
368}
369
370static int __init rpaphp_init(void)
371{
372 struct device_node *dn = NULL;
373
374 info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
375
376 while ((dn = of_find_node_by_name(dn, "pci")))
377 rpaphp_add_slot(dn);
378
379 return 0;
380}
381
382static void __exit rpaphp_exit(void)
383{
384 cleanup_slots();
385}
386
387static int enable_slot(struct hotplug_slot *hotplug_slot)
388{
389 struct slot *slot = (struct slot *)hotplug_slot->private;
390 int state;
391 int retval;
392
393 if (slot->state == CONFIGURED)
394 return 0;
395
396 retval = rpaphp_get_sensor_state(slot, &state);
397 if (retval)
398 return retval;
399
400 if (state == PRESENT) {
401 pcibios_add_pci_devices(slot->bus);
402 slot->state = CONFIGURED;
403 } else if (state == EMPTY) {
404 slot->state = EMPTY;
405 } else {
406 err("%s: slot[%s] is in invalid state\n", __func__, slot->name);
407 slot->state = NOT_VALID;
408 return -EINVAL;
409 }
410
411 slot->bus->max_bus_speed = get_max_bus_speed(slot);
412 return 0;
413}
414
415static int disable_slot(struct hotplug_slot *hotplug_slot)
416{
417 struct slot *slot = (struct slot *)hotplug_slot->private;
418 if (slot->state == NOT_CONFIGURED)
419 return -EINVAL;
420
421 pcibios_remove_pci_devices(slot->bus);
422 vm_unmap_aliases();
423
424 slot->state = NOT_CONFIGURED;
425 return 0;
426}
427
428struct hotplug_slot_ops rpaphp_hotplug_slot_ops = {
429 .enable_slot = enable_slot,
430 .disable_slot = disable_slot,
431 .set_attention_status = set_attention_status,
432 .get_power_status = get_power_status,
433 .get_attention_status = get_attention_status,
434 .get_adapter_status = get_adapter_status,
435};
436
437module_init(rpaphp_init);
438module_exit(rpaphp_exit);
439
440EXPORT_SYMBOL_GPL(rpaphp_add_slot);
441EXPORT_SYMBOL_GPL(rpaphp_slot_head);
442EXPORT_SYMBOL_GPL(rpaphp_get_drc_props);
1/*
2 * PCI Hot Plug Controller Driver for RPA-compliant PPC64 platform.
3 * Copyright (C) 2003 Linda Xie <lxie@us.ibm.com>
4 *
5 * All rights reserved.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or (at
10 * your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
15 * NON INFRINGEMENT. See the GNU General Public License for more
16 * details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 *
22 * Send feedback to <lxie@us.ibm.com>
23 *
24 */
25#include <linux/kernel.h>
26#include <linux/module.h>
27#include <linux/moduleparam.h>
28#include <linux/pci.h>
29#include <linux/pci_hotplug.h>
30#include <linux/smp.h>
31#include <linux/init.h>
32#include <linux/vmalloc.h>
33#include <asm/eeh.h> /* for eeh_add_device() */
34#include <asm/rtas.h> /* rtas_call */
35#include <asm/pci-bridge.h> /* for pci_controller */
36#include "../pci.h" /* for pci_add_new_bus */
37 /* and pci_do_scan_bus */
38#include "rpaphp.h"
39
40bool rpaphp_debug;
41LIST_HEAD(rpaphp_slot_head);
42EXPORT_SYMBOL_GPL(rpaphp_slot_head);
43
44#define DRIVER_VERSION "0.1"
45#define DRIVER_AUTHOR "Linda Xie <lxie@us.ibm.com>"
46#define DRIVER_DESC "RPA HOT Plug PCI Controller Driver"
47
48#define MAX_LOC_CODE 128
49
50MODULE_AUTHOR(DRIVER_AUTHOR);
51MODULE_DESCRIPTION(DRIVER_DESC);
52MODULE_LICENSE("GPL");
53
54module_param_named(debug, rpaphp_debug, bool, 0644);
55
56/**
57 * set_attention_status - set attention LED
58 * @hotplug_slot: target &hotplug_slot
59 * @value: LED control value
60 *
61 * echo 0 > attention -- set LED OFF
62 * echo 1 > attention -- set LED ON
63 * echo 2 > attention -- set LED ID(identify, light is blinking)
64 */
65static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 value)
66{
67 int rc;
68 struct slot *slot = (struct slot *)hotplug_slot->private;
69
70 switch (value) {
71 case 0:
72 case 1:
73 case 2:
74 break;
75 default:
76 value = 1;
77 break;
78 }
79
80 rc = rtas_set_indicator(DR_INDICATOR, slot->index, value);
81 if (!rc)
82 hotplug_slot->info->attention_status = value;
83
84 return rc;
85}
86
87/**
88 * get_power_status - get power status of a slot
89 * @hotplug_slot: slot to get status
90 * @value: pointer to store status
91 */
92static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
93{
94 int retval, level;
95 struct slot *slot = (struct slot *)hotplug_slot->private;
96
97 retval = rtas_get_power_level(slot->power_domain, &level);
98 if (!retval)
99 *value = level;
100 return retval;
101}
102
103/**
104 * get_attention_status - get attention LED status
105 * @hotplug_slot: slot to get status
106 * @value: pointer to store status
107 */
108static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
109{
110 struct slot *slot = (struct slot *)hotplug_slot->private;
111 *value = slot->hotplug_slot->info->attention_status;
112 return 0;
113}
114
115static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
116{
117 struct slot *slot = (struct slot *)hotplug_slot->private;
118 int rc, state;
119
120 rc = rpaphp_get_sensor_state(slot, &state);
121
122 *value = NOT_VALID;
123 if (rc)
124 return rc;
125
126 if (state == EMPTY)
127 *value = EMPTY;
128 else if (state == PRESENT)
129 *value = slot->state;
130
131 return 0;
132}
133
134static enum pci_bus_speed get_max_bus_speed(struct slot *slot)
135{
136 enum pci_bus_speed speed;
137 switch (slot->type) {
138 case 1:
139 case 2:
140 case 3:
141 case 4:
142 case 5:
143 case 6:
144 speed = PCI_SPEED_33MHz; /* speed for case 1-6 */
145 break;
146 case 7:
147 case 8:
148 speed = PCI_SPEED_66MHz;
149 break;
150 case 11:
151 case 14:
152 speed = PCI_SPEED_66MHz_PCIX;
153 break;
154 case 12:
155 case 15:
156 speed = PCI_SPEED_100MHz_PCIX;
157 break;
158 case 13:
159 case 16:
160 speed = PCI_SPEED_133MHz_PCIX;
161 break;
162 default:
163 speed = PCI_SPEED_UNKNOWN;
164 break;
165 }
166
167 return speed;
168}
169
170static int get_children_props(struct device_node *dn, const int **drc_indexes,
171 const int **drc_names, const int **drc_types,
172 const int **drc_power_domains)
173{
174 const int *indexes, *names, *types, *domains;
175
176 indexes = of_get_property(dn, "ibm,drc-indexes", NULL);
177 names = of_get_property(dn, "ibm,drc-names", NULL);
178 types = of_get_property(dn, "ibm,drc-types", NULL);
179 domains = of_get_property(dn, "ibm,drc-power-domains", NULL);
180
181 if (!indexes || !names || !types || !domains) {
182 /* Slot does not have dynamically-removable children */
183 return -EINVAL;
184 }
185 if (drc_indexes)
186 *drc_indexes = indexes;
187 if (drc_names)
188 /* &drc_names[1] contains NULL terminated slot names */
189 *drc_names = names;
190 if (drc_types)
191 /* &drc_types[1] contains NULL terminated slot types */
192 *drc_types = types;
193 if (drc_power_domains)
194 *drc_power_domains = domains;
195
196 return 0;
197}
198
199/* To get the DRC props describing the current node, first obtain it's
200 * my-drc-index property. Next obtain the DRC list from it's parent. Use
201 * the my-drc-index for correlation, and obtain the requested properties.
202 */
203int rpaphp_get_drc_props(struct device_node *dn, int *drc_index,
204 char **drc_name, char **drc_type, int *drc_power_domain)
205{
206 const int *indexes, *names;
207 const int *types, *domains;
208 const unsigned int *my_index;
209 char *name_tmp, *type_tmp;
210 int i, rc;
211
212 my_index = of_get_property(dn, "ibm,my-drc-index", NULL);
213 if (!my_index) {
214 /* Node isn't DLPAR/hotplug capable */
215 return -EINVAL;
216 }
217
218 rc = get_children_props(dn->parent, &indexes, &names, &types, &domains);
219 if (rc < 0) {
220 return -EINVAL;
221 }
222
223 name_tmp = (char *) &names[1];
224 type_tmp = (char *) &types[1];
225
226 /* Iterate through parent properties, looking for my-drc-index */
227 for (i = 0; i < be32_to_cpu(indexes[0]); i++) {
228 if ((unsigned int) indexes[i + 1] == *my_index) {
229 if (drc_name)
230 *drc_name = name_tmp;
231 if (drc_type)
232 *drc_type = type_tmp;
233 if (drc_index)
234 *drc_index = be32_to_cpu(*my_index);
235 if (drc_power_domain)
236 *drc_power_domain = be32_to_cpu(domains[i+1]);
237 return 0;
238 }
239 name_tmp += (strlen(name_tmp) + 1);
240 type_tmp += (strlen(type_tmp) + 1);
241 }
242
243 return -EINVAL;
244}
245EXPORT_SYMBOL_GPL(rpaphp_get_drc_props);
246
247static int is_php_type(char *drc_type)
248{
249 unsigned long value;
250 char *endptr;
251
252 /* PCI Hotplug nodes have an integer for drc_type */
253 value = simple_strtoul(drc_type, &endptr, 10);
254 if (endptr == drc_type)
255 return 0;
256
257 return 1;
258}
259
260/**
261 * is_php_dn() - return 1 if this is a hotpluggable pci slot, else 0
262 * @dn: target &device_node
263 * @indexes: passed to get_children_props()
264 * @names: passed to get_children_props()
265 * @types: returned from get_children_props()
266 * @power_domains:
267 *
268 * This routine will return true only if the device node is
269 * a hotpluggable slot. This routine will return false
270 * for built-in pci slots (even when the built-in slots are
271 * dlparable.)
272 */
273static int is_php_dn(struct device_node *dn, const int **indexes,
274 const int **names, const int **types, const int **power_domains)
275{
276 const int *drc_types;
277 int rc;
278
279 rc = get_children_props(dn, indexes, names, &drc_types, power_domains);
280 if (rc < 0)
281 return 0;
282
283 if (!is_php_type((char *) &drc_types[1]))
284 return 0;
285
286 *types = drc_types;
287 return 1;
288}
289
290/**
291 * rpaphp_add_slot -- declare a hotplug slot to the hotplug subsystem.
292 * @dn: device node of slot
293 *
294 * This subroutine will register a hotpluggable slot with the
295 * PCI hotplug infrastructure. This routine is typically called
296 * during boot time, if the hotplug slots are present at boot time,
297 * or is called later, by the dlpar add code, if the slot is
298 * being dynamically added during runtime.
299 *
300 * If the device node points at an embedded (built-in) slot, this
301 * routine will just return without doing anything, since embedded
302 * slots cannot be hotplugged.
303 *
304 * To remove a slot, it suffices to call rpaphp_deregister_slot().
305 */
306int rpaphp_add_slot(struct device_node *dn)
307{
308 struct slot *slot;
309 int retval = 0;
310 int i;
311 const int *indexes, *names, *types, *power_domains;
312 char *name, *type;
313
314 if (!dn->name || strcmp(dn->name, "pci"))
315 return 0;
316
317 /* If this is not a hotplug slot, return without doing anything. */
318 if (!is_php_dn(dn, &indexes, &names, &types, &power_domains))
319 return 0;
320
321 dbg("Entry %s: dn->full_name=%s\n", __func__, dn->full_name);
322
323 /* register PCI devices */
324 name = (char *) &names[1];
325 type = (char *) &types[1];
326 for (i = 0; i < be32_to_cpu(indexes[0]); i++) {
327 int index;
328
329 index = be32_to_cpu(indexes[i + 1]);
330 slot = alloc_slot_struct(dn, index, name,
331 be32_to_cpu(power_domains[i + 1]));
332 if (!slot)
333 return -ENOMEM;
334
335 slot->type = simple_strtoul(type, NULL, 10);
336
337 dbg("Found drc-index:0x%x drc-name:%s drc-type:%s\n",
338 index, name, type);
339
340 retval = rpaphp_enable_slot(slot);
341 if (!retval)
342 retval = rpaphp_register_slot(slot);
343
344 if (retval)
345 dealloc_slot_struct(slot);
346
347 name += strlen(name) + 1;
348 type += strlen(type) + 1;
349 }
350 dbg("%s - Exit: rc[%d]\n", __func__, retval);
351
352 /* XXX FIXME: reports a failure only if last entry in loop failed */
353 return retval;
354}
355EXPORT_SYMBOL_GPL(rpaphp_add_slot);
356
357static void __exit cleanup_slots(void)
358{
359 struct slot *slot, *next;
360
361 /*
362 * Unregister all of our slots with the pci_hotplug subsystem,
363 * and free up all memory that we had allocated.
364 * memory will be freed in release_slot callback.
365 */
366
367 list_for_each_entry_safe(slot, next, &rpaphp_slot_head,
368 rpaphp_slot_list) {
369 list_del(&slot->rpaphp_slot_list);
370 pci_hp_deregister(slot->hotplug_slot);
371 }
372 return;
373}
374
375static int __init rpaphp_init(void)
376{
377 struct device_node *dn;
378
379 info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
380
381 for_each_node_by_name(dn, "pci")
382 rpaphp_add_slot(dn);
383
384 return 0;
385}
386
387static void __exit rpaphp_exit(void)
388{
389 cleanup_slots();
390}
391
392static int enable_slot(struct hotplug_slot *hotplug_slot)
393{
394 struct slot *slot = (struct slot *)hotplug_slot->private;
395 int state;
396 int retval;
397
398 if (slot->state == CONFIGURED)
399 return 0;
400
401 retval = rpaphp_get_sensor_state(slot, &state);
402 if (retval)
403 return retval;
404
405 if (state == PRESENT) {
406 pci_lock_rescan_remove();
407 pci_hp_add_devices(slot->bus);
408 pci_unlock_rescan_remove();
409 slot->state = CONFIGURED;
410 } else if (state == EMPTY) {
411 slot->state = EMPTY;
412 } else {
413 err("%s: slot[%s] is in invalid state\n", __func__, slot->name);
414 slot->state = NOT_VALID;
415 return -EINVAL;
416 }
417
418 slot->bus->max_bus_speed = get_max_bus_speed(slot);
419 return 0;
420}
421
422static int disable_slot(struct hotplug_slot *hotplug_slot)
423{
424 struct slot *slot = (struct slot *)hotplug_slot->private;
425 if (slot->state == NOT_CONFIGURED)
426 return -EINVAL;
427
428 pci_lock_rescan_remove();
429 pci_hp_remove_devices(slot->bus);
430 pci_unlock_rescan_remove();
431 vm_unmap_aliases();
432
433 slot->state = NOT_CONFIGURED;
434 return 0;
435}
436
437struct hotplug_slot_ops rpaphp_hotplug_slot_ops = {
438 .enable_slot = enable_slot,
439 .disable_slot = disable_slot,
440 .set_attention_status = set_attention_status,
441 .get_power_status = get_power_status,
442 .get_attention_status = get_attention_status,
443 .get_adapter_status = get_adapter_status,
444};
445
446module_init(rpaphp_init);
447module_exit(rpaphp_exit);