blob: 5122b5a8aa2db1aea54221a70377a70d6e6ed021 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Node information (ConfigROM) collection and management.
3 *
4 * Copyright (C) 2000 Andreas E. Bombe
5 * 2001-2003 Ben Collins <bcollins@debian.net>
6 *
7 * This code is licensed under the GPL. See the file COPYING in the root
8 * directory of the kernel sources for details.
9 */
10
Stefan Richter09a9a452006-06-25 05:46:44 -070011#include <linux/bitmap.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070012#include <linux/kernel.h>
Vegard Nossum004cdb52008-09-10 15:15:23 +020013#include <linux/kmemcheck.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070014#include <linux/list.h>
15#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016#include <linux/delay.h>
Stefan Richterd2f119f2006-07-03 12:02:35 -040017#include <linux/kthread.h>
Stefan Richter8252bbb2006-11-22 21:09:42 +010018#include <linux/module.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#include <linux/moduleparam.h>
Stefan Richter9543a932007-04-10 02:39:07 +020020#include <linux/mutex.h>
Nigel Cunningham7dfb7102006-12-06 20:34:23 -080021#include <linux/freezer.h>
Matthew Wilcox6188e102008-04-18 22:21:05 -040022#include <linux/semaphore.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#include <asm/atomic.h>
24
Stefan Richterde4394f2006-07-03 12:02:29 -040025#include "csr.h"
26#include "highlevel.h"
27#include "hosts.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include "ieee1394.h"
29#include "ieee1394_core.h"
Stefan Richterde4394f2006-07-03 12:02:29 -040030#include "ieee1394_hotplug.h"
31#include "ieee1394_types.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#include "ieee1394_transactions.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#include "nodemgr.h"
34
Ben Collins1934b8b2005-07-09 20:01:23 -040035static int ignore_drivers;
Stefan Richter3a632fe2006-07-03 12:02:35 -040036module_param(ignore_drivers, int, S_IRUGO | S_IWUSR);
Linus Torvalds1da177e2005-04-16 15:20:36 -070037MODULE_PARM_DESC(ignore_drivers, "Disable automatic probing for drivers.");
38
39struct nodemgr_csr_info {
40 struct hpsb_host *host;
41 nodeid_t nodeid;
42 unsigned int generation;
Vegard Nossum004cdb52008-09-10 15:15:23 +020043
44 kmemcheck_bitfield_begin(flags);
Ben Collins647dcb52006-06-12 18:12:37 -040045 unsigned int speed_unverified:1;
Vegard Nossum004cdb52008-09-10 15:15:23 +020046 kmemcheck_bitfield_end(flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -070047};
48
49
Ben Collins647dcb52006-06-12 18:12:37 -040050/*
51 * Correct the speed map entry. This is necessary
52 * - for nodes with link speed < phy speed,
53 * - for 1394b nodes with negotiated phy port speed < IEEE1394_SPEED_MAX.
54 * A possible speed is determined by trial and error, using quadlet reads.
55 */
56static int nodemgr_check_speed(struct nodemgr_csr_info *ci, u64 addr,
57 quadlet_t *buffer)
58{
59 quadlet_t q;
60 u8 i, *speed, old_speed, good_speed;
Stefan Richter7fdfc902006-10-21 01:23:56 +020061 int error;
Ben Collins647dcb52006-06-12 18:12:37 -040062
Stefan Richterd7530a12006-07-03 00:58:01 +020063 speed = &(ci->host->speed[NODEID_TO_NODE(ci->nodeid)]);
Ben Collins647dcb52006-06-12 18:12:37 -040064 old_speed = *speed;
65 good_speed = IEEE1394_SPEED_MAX + 1;
66
67 /* Try every speed from S100 to old_speed.
68 * If we did it the other way around, a too low speed could be caught
69 * if the retry succeeded for some other reason, e.g. because the link
70 * just finished its initialization. */
71 for (i = IEEE1394_SPEED_100; i <= old_speed; i++) {
72 *speed = i;
Stefan Richter7fdfc902006-10-21 01:23:56 +020073 error = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
Stefan Richter0bed1812008-12-13 23:12:06 +010074 &q, 4);
Stefan Richter7fdfc902006-10-21 01:23:56 +020075 if (error)
Ben Collins647dcb52006-06-12 18:12:37 -040076 break;
77 *buffer = q;
78 good_speed = i;
79 }
80 if (good_speed <= IEEE1394_SPEED_MAX) {
81 HPSB_DEBUG("Speed probe of node " NODE_BUS_FMT " yields %s",
82 NODE_BUS_ARGS(ci->host, ci->nodeid),
83 hpsb_speedto_str[good_speed]);
84 *speed = good_speed;
85 ci->speed_unverified = 0;
86 return 0;
87 }
88 *speed = old_speed;
Stefan Richter7fdfc902006-10-21 01:23:56 +020089 return error;
Ben Collins647dcb52006-06-12 18:12:37 -040090}
Linus Torvalds1da177e2005-04-16 15:20:36 -070091
Stefan Richter0bed1812008-12-13 23:12:06 +010092static int nodemgr_bus_read(struct csr1212_csr *csr, u64 addr,
Stefan Richterd41bba22006-11-22 21:28:19 +010093 void *buffer, void *__ci)
Linus Torvalds1da177e2005-04-16 15:20:36 -070094{
95 struct nodemgr_csr_info *ci = (struct nodemgr_csr_info*)__ci;
Stefan Richter7fdfc902006-10-21 01:23:56 +020096 int i, error;
Linus Torvalds1da177e2005-04-16 15:20:36 -070097
Jody McIntyree31a1272005-09-30 11:59:09 -070098 for (i = 1; ; i++) {
Stefan Richter7fdfc902006-10-21 01:23:56 +020099 error = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
Stefan Richter0bed1812008-12-13 23:12:06 +0100100 buffer, 4);
Stefan Richter7fdfc902006-10-21 01:23:56 +0200101 if (!error) {
Ben Collins647dcb52006-06-12 18:12:37 -0400102 ci->speed_unverified = 0;
103 break;
104 }
105 /* Give up after 3rd failure. */
106 if (i == 3)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 break;
108
Ben Collins647dcb52006-06-12 18:12:37 -0400109 /* The ieee1394_core guessed the node's speed capability from
110 * the self ID. Check whether a lower speed works. */
Stefan Richter0bed1812008-12-13 23:12:06 +0100111 if (ci->speed_unverified) {
Stefan Richter7fdfc902006-10-21 01:23:56 +0200112 error = nodemgr_check_speed(ci, addr, buffer);
113 if (!error)
Ben Collins647dcb52006-06-12 18:12:37 -0400114 break;
115 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 if (msleep_interruptible(334))
117 return -EINTR;
118 }
Stefan Richter7fdfc902006-10-21 01:23:56 +0200119 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120}
121
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122static struct csr1212_bus_ops nodemgr_csr_ops = {
123 .bus_read = nodemgr_bus_read,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124};
125
126
127/*
128 * Basically what we do here is start off retrieving the bus_info block.
129 * From there will fill in some info about the node, verify it is of IEEE
130 * 1394 type, and that the crc checks out ok. After that we start off with
131 * the root directory, and subdirectories. To do this, we retrieve the
132 * quadlet header for a directory, find out the length, and retrieve the
133 * complete directory entry (be it a leaf or a directory). We then process
134 * it and add the info to our structure for that particular node.
135 *
136 * We verify CRC's along the way for each directory/block/leaf. The entire
137 * node structure is generic, and simply stores the information in a way
138 * that's easy to parse by the protocol interface.
139 */
140
141/*
142 * The nodemgr relies heavily on the Driver Model for device callbacks and
143 * driver/device mappings. The old nodemgr used to handle all this itself,
144 * but now we are much simpler because of the LDM.
145 */
146
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147struct host_info {
148 struct hpsb_host *host;
149 struct list_head list;
Stefan Richterd2f119f2006-07-03 12:02:35 -0400150 struct task_struct *thread;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151};
152
153static int nodemgr_bus_match(struct device * dev, struct device_driver * drv);
Kay Sievers7eff2e72007-08-14 15:15:12 +0200154static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155
156struct bus_type ieee1394_bus_type = {
157 .name = "ieee1394",
158 .match = nodemgr_bus_match,
159};
160
Kay Sieversdd7f2922007-05-25 11:50:53 +0200161static void host_cls_release(struct device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162{
Kay Sieversdd7f2922007-05-25 11:50:53 +0200163 put_device(&container_of((dev), struct hpsb_host, host_dev)->device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164}
165
166struct class hpsb_host_class = {
167 .name = "ieee1394_host",
Kay Sieversdd7f2922007-05-25 11:50:53 +0200168 .dev_release = host_cls_release,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169};
170
Kay Sieversdd7f2922007-05-25 11:50:53 +0200171static void ne_cls_release(struct device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172{
Kay Sieversdd7f2922007-05-25 11:50:53 +0200173 put_device(&container_of((dev), struct node_entry, node_dev)->device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174}
175
176static struct class nodemgr_ne_class = {
177 .name = "ieee1394_node",
Kay Sieversdd7f2922007-05-25 11:50:53 +0200178 .dev_release = ne_cls_release,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179};
180
Kay Sieversdd7f2922007-05-25 11:50:53 +0200181static void ud_cls_release(struct device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182{
Kay Sieversdd7f2922007-05-25 11:50:53 +0200183 put_device(&container_of((dev), struct unit_directory, unit_dev)->device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184}
185
186/* The name here is only so that unit directory hotplug works with old
Kay Sieversdd7f2922007-05-25 11:50:53 +0200187 * style hotplug, which only ever did unit directories anyway.
188 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189static struct class nodemgr_ud_class = {
190 .name = "ieee1394",
Kay Sieversdd7f2922007-05-25 11:50:53 +0200191 .dev_release = ud_cls_release,
192 .dev_uevent = nodemgr_uevent,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193};
194
195static struct hpsb_highlevel nodemgr_highlevel;
196
197
198static void nodemgr_release_ud(struct device *dev)
199{
200 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
201
202 if (ud->vendor_name_kv)
203 csr1212_release_keyval(ud->vendor_name_kv);
204 if (ud->model_name_kv)
205 csr1212_release_keyval(ud->model_name_kv);
206
207 kfree(ud);
208}
209
210static void nodemgr_release_ne(struct device *dev)
211{
212 struct node_entry *ne = container_of(dev, struct node_entry, device);
213
214 if (ne->vendor_name_kv)
215 csr1212_release_keyval(ne->vendor_name_kv);
216
217 kfree(ne);
218}
219
220
221static void nodemgr_release_host(struct device *dev)
222{
223 struct hpsb_host *host = container_of(dev, struct hpsb_host, device);
224
225 csr1212_destroy_csr(host->csr.rom);
226
227 kfree(host);
228}
229
230static int nodemgr_ud_platform_data;
231
232static struct device nodemgr_dev_template_ud = {
233 .bus = &ieee1394_bus_type,
234 .release = nodemgr_release_ud,
235 .platform_data = &nodemgr_ud_platform_data,
236};
237
238static struct device nodemgr_dev_template_ne = {
239 .bus = &ieee1394_bus_type,
240 .release = nodemgr_release_ne,
241};
242
Stefan Richter8252bbb2006-11-22 21:09:42 +0100243/* This dummy driver prevents the host devices from being scanned. We have no
244 * useful drivers for them yet, and there would be a deadlock possible if the
245 * driver core scans the host device while the host's low-level driver (i.e.
246 * the host's parent device) is being removed. */
247static struct device_driver nodemgr_mid_layer_driver = {
248 .bus = &ieee1394_bus_type,
249 .name = "nodemgr",
250 .owner = THIS_MODULE,
251};
252
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253struct device nodemgr_dev_template_host = {
254 .bus = &ieee1394_bus_type,
255 .release = nodemgr_release_host,
256};
257
258
259#define fw_attr(class, class_type, field, type, format_string) \
Yani Ioannoue404e272005-05-17 06:42:58 -0400260static ssize_t fw_show_##class##_##field (struct device *dev, struct device_attribute *attr, char *buf)\
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261{ \
262 class_type *class; \
263 class = container_of(dev, class_type, device); \
264 return sprintf(buf, format_string, (type)class->field); \
265} \
266static struct device_attribute dev_attr_##class##_##field = { \
267 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
268 .show = fw_show_##class##_##field, \
269};
270
271#define fw_attr_td(class, class_type, td_kv) \
Yani Ioannoue404e272005-05-17 06:42:58 -0400272static ssize_t fw_show_##class##_##td_kv (struct device *dev, struct device_attribute *attr, char *buf)\
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273{ \
274 int len; \
275 class_type *class = container_of(dev, class_type, device); \
276 len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t); \
277 memcpy(buf, \
278 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv), \
279 len); \
Al Viro51ec1382007-07-15 20:59:51 +0100280 while (buf[len - 1] == '\0') \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281 len--; \
282 buf[len++] = '\n'; \
283 buf[len] = '\0'; \
284 return len; \
285} \
286static struct device_attribute dev_attr_##class##_##td_kv = { \
287 .attr = {.name = __stringify(td_kv), .mode = S_IRUGO }, \
288 .show = fw_show_##class##_##td_kv, \
289};
290
291
292#define fw_drv_attr(field, type, format_string) \
293static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \
294{ \
295 struct hpsb_protocol_driver *driver; \
296 driver = container_of(drv, struct hpsb_protocol_driver, driver); \
297 return sprintf(buf, format_string, (type)driver->field);\
298} \
299static struct driver_attribute driver_attr_drv_##field = { \
Stefan Richterd41bba22006-11-22 21:28:19 +0100300 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
301 .show = fw_drv_show_##field, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302};
303
304
Yani Ioannoue404e272005-05-17 06:42:58 -0400305static ssize_t fw_show_ne_bus_options(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306{
307 struct node_entry *ne = container_of(dev, struct node_entry, device);
308
309 return sprintf(buf, "IRMC(%d) CMC(%d) ISC(%d) BMC(%d) PMC(%d) GEN(%d) "
310 "LSPD(%d) MAX_REC(%d) MAX_ROM(%d) CYC_CLK_ACC(%d)\n",
311 ne->busopt.irmc,
312 ne->busopt.cmc, ne->busopt.isc, ne->busopt.bmc,
313 ne->busopt.pmc, ne->busopt.generation, ne->busopt.lnkspd,
314 ne->busopt.max_rec,
315 ne->busopt.max_rom,
316 ne->busopt.cyc_clk_acc);
317}
318static DEVICE_ATTR(bus_options,S_IRUGO,fw_show_ne_bus_options,NULL);
319
320
Stefan Richter99519032006-07-02 14:17:00 +0200321#ifdef HPSB_DEBUG_TLABELS
322static ssize_t fw_show_ne_tlabels_free(struct device *dev,
323 struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324{
325 struct node_entry *ne = container_of(dev, struct node_entry, device);
Stefan Richter99519032006-07-02 14:17:00 +0200326 unsigned long flags;
327 unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map;
328 int tf;
329
330 spin_lock_irqsave(&hpsb_tlabel_lock, flags);
331 tf = 64 - bitmap_weight(tp, 64);
332 spin_unlock_irqrestore(&hpsb_tlabel_lock, flags);
333
334 return sprintf(buf, "%d\n", tf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335}
336static DEVICE_ATTR(tlabels_free,S_IRUGO,fw_show_ne_tlabels_free,NULL);
337
338
Stefan Richter99519032006-07-02 14:17:00 +0200339static ssize_t fw_show_ne_tlabels_mask(struct device *dev,
340 struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341{
342 struct node_entry *ne = container_of(dev, struct node_entry, device);
Stefan Richter99519032006-07-02 14:17:00 +0200343 unsigned long flags;
344 unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map;
345 u64 tm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346
Stefan Richter99519032006-07-02 14:17:00 +0200347 spin_lock_irqsave(&hpsb_tlabel_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348#if (BITS_PER_LONG <= 32)
Stefan Richter99519032006-07-02 14:17:00 +0200349 tm = ((u64)tp[0] << 32) + tp[1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350#else
Stefan Richter99519032006-07-02 14:17:00 +0200351 tm = tp[0];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352#endif
Stefan Richter99519032006-07-02 14:17:00 +0200353 spin_unlock_irqrestore(&hpsb_tlabel_lock, flags);
354
Randy Dunlap7f588032006-10-23 21:44:36 -0700355 return sprintf(buf, "0x%016llx\n", (unsigned long long)tm);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356}
357static DEVICE_ATTR(tlabels_mask, S_IRUGO, fw_show_ne_tlabels_mask, NULL);
Stefan Richter99519032006-07-02 14:17:00 +0200358#endif /* HPSB_DEBUG_TLABELS */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359
360
Yani Ioannoue404e272005-05-17 06:42:58 -0400361static ssize_t fw_set_ignore_driver(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362{
363 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
364 int state = simple_strtoul(buf, NULL, 10);
365
366 if (state == 1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367 ud->ignore_driver = 1;
Stefan Richterb07375b2006-10-22 16:16:27 +0200368 device_release_driver(dev);
Stefan Richterb07375b2006-10-22 16:16:27 +0200369 } else if (state == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 ud->ignore_driver = 0;
371
372 return count;
373}
Yani Ioannoue404e272005-05-17 06:42:58 -0400374static ssize_t fw_get_ignore_driver(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375{
376 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
377
378 return sprintf(buf, "%d\n", ud->ignore_driver);
379}
380static DEVICE_ATTR(ignore_driver, S_IWUSR | S_IRUGO, fw_get_ignore_driver, fw_set_ignore_driver);
381
382
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200383static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf,
384 size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385{
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200386 int error = 0;
387
Stefan Richter40fd89c2006-07-03 12:02:34 -0400388 if (simple_strtoul(buf, NULL, 10) == 1)
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200389 error = bus_rescan_devices(&ieee1394_bus_type);
390 return error ? error : count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391}
392static ssize_t fw_get_rescan(struct bus_type *bus, char *buf)
393{
394 return sprintf(buf, "You can force a rescan of the bus for "
395 "drivers by writing a 1 to this file\n");
396}
397static BUS_ATTR(rescan, S_IWUSR | S_IRUGO, fw_get_rescan, fw_set_rescan);
398
399
400static ssize_t fw_set_ignore_drivers(struct bus_type *bus, const char *buf, size_t count)
401{
402 int state = simple_strtoul(buf, NULL, 10);
403
404 if (state == 1)
405 ignore_drivers = 1;
Stefan Richterb07375b2006-10-22 16:16:27 +0200406 else if (state == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 ignore_drivers = 0;
408
409 return count;
410}
411static ssize_t fw_get_ignore_drivers(struct bus_type *bus, char *buf)
412{
413 return sprintf(buf, "%d\n", ignore_drivers);
414}
415static BUS_ATTR(ignore_drivers, S_IWUSR | S_IRUGO, fw_get_ignore_drivers, fw_set_ignore_drivers);
416
417
418struct bus_attribute *const fw_bus_attrs[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 &bus_attr_rescan,
420 &bus_attr_ignore_drivers,
421 NULL
422};
423
424
425fw_attr(ne, struct node_entry, capabilities, unsigned int, "0x%06x\n")
426fw_attr(ne, struct node_entry, nodeid, unsigned int, "0x%04x\n")
427
428fw_attr(ne, struct node_entry, vendor_id, unsigned int, "0x%06x\n")
429fw_attr_td(ne, struct node_entry, vendor_name_kv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430
431fw_attr(ne, struct node_entry, guid, unsigned long long, "0x%016Lx\n")
432fw_attr(ne, struct node_entry, guid_vendor_id, unsigned int, "0x%06x\n")
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433fw_attr(ne, struct node_entry, in_limbo, int, "%d\n");
434
435static struct device_attribute *const fw_ne_attrs[] = {
436 &dev_attr_ne_guid,
437 &dev_attr_ne_guid_vendor_id,
438 &dev_attr_ne_capabilities,
439 &dev_attr_ne_vendor_id,
440 &dev_attr_ne_nodeid,
441 &dev_attr_bus_options,
Stefan Richter99519032006-07-02 14:17:00 +0200442#ifdef HPSB_DEBUG_TLABELS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443 &dev_attr_tlabels_free,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 &dev_attr_tlabels_mask,
Stefan Richter99519032006-07-02 14:17:00 +0200445#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446};
447
448
449
450fw_attr(ud, struct unit_directory, address, unsigned long long, "0x%016Lx\n")
451fw_attr(ud, struct unit_directory, length, int, "%d\n")
452/* These are all dependent on the value being provided */
453fw_attr(ud, struct unit_directory, vendor_id, unsigned int, "0x%06x\n")
454fw_attr(ud, struct unit_directory, model_id, unsigned int, "0x%06x\n")
455fw_attr(ud, struct unit_directory, specifier_id, unsigned int, "0x%06x\n")
456fw_attr(ud, struct unit_directory, version, unsigned int, "0x%06x\n")
457fw_attr_td(ud, struct unit_directory, vendor_name_kv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458fw_attr_td(ud, struct unit_directory, model_name_kv)
459
460static struct device_attribute *const fw_ud_attrs[] = {
461 &dev_attr_ud_address,
462 &dev_attr_ud_length,
463 &dev_attr_ignore_driver,
464};
465
466
467fw_attr(host, struct hpsb_host, node_count, int, "%d\n")
468fw_attr(host, struct hpsb_host, selfid_count, int, "%d\n")
469fw_attr(host, struct hpsb_host, nodes_active, int, "%d\n")
470fw_attr(host, struct hpsb_host, in_bus_reset, int, "%d\n")
471fw_attr(host, struct hpsb_host, is_root, int, "%d\n")
472fw_attr(host, struct hpsb_host, is_cycmst, int, "%d\n")
473fw_attr(host, struct hpsb_host, is_irm, int, "%d\n")
474fw_attr(host, struct hpsb_host, is_busmgr, int, "%d\n")
475
476static struct device_attribute *const fw_host_attrs[] = {
477 &dev_attr_host_node_count,
478 &dev_attr_host_selfid_count,
479 &dev_attr_host_nodes_active,
480 &dev_attr_host_in_bus_reset,
481 &dev_attr_host_is_root,
482 &dev_attr_host_is_cycmst,
483 &dev_attr_host_is_irm,
484 &dev_attr_host_is_busmgr,
485};
486
487
488static ssize_t fw_show_drv_device_ids(struct device_driver *drv, char *buf)
489{
490 struct hpsb_protocol_driver *driver;
Stefan Richterc6409462009-02-15 23:11:38 +0100491 const struct ieee1394_device_id *id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 int length = 0;
493 char *scratch = buf;
494
Stefan Richterd41bba22006-11-22 21:28:19 +0100495 driver = container_of(drv, struct hpsb_protocol_driver, driver);
Stefan Richter07c72242008-05-01 10:43:04 +0200496 id = driver->id_table;
497 if (!id)
498 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499
Stefan Richter07c72242008-05-01 10:43:04 +0200500 for (; id->match_flags != 0; id++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501 int need_coma = 0;
502
503 if (id->match_flags & IEEE1394_MATCH_VENDOR_ID) {
504 length += sprintf(scratch, "vendor_id=0x%06x", id->vendor_id);
505 scratch = buf + length;
506 need_coma++;
507 }
508
509 if (id->match_flags & IEEE1394_MATCH_MODEL_ID) {
510 length += sprintf(scratch, "%smodel_id=0x%06x",
511 need_coma++ ? "," : "",
512 id->model_id);
513 scratch = buf + length;
514 }
515
516 if (id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) {
517 length += sprintf(scratch, "%sspecifier_id=0x%06x",
518 need_coma++ ? "," : "",
519 id->specifier_id);
520 scratch = buf + length;
521 }
522
523 if (id->match_flags & IEEE1394_MATCH_VERSION) {
524 length += sprintf(scratch, "%sversion=0x%06x",
525 need_coma++ ? "," : "",
526 id->version);
527 scratch = buf + length;
528 }
529
530 if (need_coma) {
531 *scratch++ = '\n';
532 length++;
533 }
534 }
535
536 return length;
537}
538static DRIVER_ATTR(device_ids,S_IRUGO,fw_show_drv_device_ids,NULL);
539
540
541fw_drv_attr(name, const char *, "%s\n")
542
543static struct driver_attribute *const fw_drv_attrs[] = {
544 &driver_attr_drv_name,
545 &driver_attr_device_ids,
546};
547
548
549static void nodemgr_create_drv_files(struct hpsb_protocol_driver *driver)
550{
551 struct device_driver *drv = &driver->driver;
552 int i;
553
554 for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200555 if (driver_create_file(drv, fw_drv_attrs[i]))
556 goto fail;
557 return;
558fail:
Stefan Richter9be51c52007-03-30 19:21:05 +0200559 HPSB_ERR("Failed to add sysfs attribute");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560}
561
562
563static void nodemgr_remove_drv_files(struct hpsb_protocol_driver *driver)
564{
565 struct device_driver *drv = &driver->driver;
566 int i;
567
568 for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
569 driver_remove_file(drv, fw_drv_attrs[i]);
570}
571
572
573static void nodemgr_create_ne_dev_files(struct node_entry *ne)
574{
575 struct device *dev = &ne->device;
576 int i;
577
578 for (i = 0; i < ARRAY_SIZE(fw_ne_attrs); i++)
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200579 if (device_create_file(dev, fw_ne_attrs[i]))
580 goto fail;
581 return;
582fail:
Stefan Richter9be51c52007-03-30 19:21:05 +0200583 HPSB_ERR("Failed to add sysfs attribute");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584}
585
586
587static void nodemgr_create_host_dev_files(struct hpsb_host *host)
588{
589 struct device *dev = &host->device;
590 int i;
591
592 for (i = 0; i < ARRAY_SIZE(fw_host_attrs); i++)
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200593 if (device_create_file(dev, fw_host_attrs[i]))
594 goto fail;
595 return;
596fail:
Stefan Richter9be51c52007-03-30 19:21:05 +0200597 HPSB_ERR("Failed to add sysfs attribute");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598}
599
600
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200601static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host,
602 nodeid_t nodeid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603
604static void nodemgr_update_host_dev_links(struct hpsb_host *host)
605{
606 struct device *dev = &host->device;
607 struct node_entry *ne;
608
609 sysfs_remove_link(&dev->kobj, "irm_id");
610 sysfs_remove_link(&dev->kobj, "busmgr_id");
611 sysfs_remove_link(&dev->kobj, "host_id");
612
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200613 if ((ne = find_entry_by_nodeid(host, host->irm_id)) &&
614 sysfs_create_link(&dev->kobj, &ne->device.kobj, "irm_id"))
615 goto fail;
616 if ((ne = find_entry_by_nodeid(host, host->busmgr_id)) &&
617 sysfs_create_link(&dev->kobj, &ne->device.kobj, "busmgr_id"))
618 goto fail;
619 if ((ne = find_entry_by_nodeid(host, host->node_id)) &&
620 sysfs_create_link(&dev->kobj, &ne->device.kobj, "host_id"))
621 goto fail;
622 return;
623fail:
624 HPSB_ERR("Failed to update sysfs attributes for host %d", host->id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625}
626
627static void nodemgr_create_ud_dev_files(struct unit_directory *ud)
628{
629 struct device *dev = &ud->device;
630 int i;
631
632 for (i = 0; i < ARRAY_SIZE(fw_ud_attrs); i++)
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200633 if (device_create_file(dev, fw_ud_attrs[i]))
634 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635 if (ud->flags & UNIT_DIRECTORY_SPECIFIER_ID)
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200636 if (device_create_file(dev, &dev_attr_ud_specifier_id))
637 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638 if (ud->flags & UNIT_DIRECTORY_VERSION)
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200639 if (device_create_file(dev, &dev_attr_ud_version))
640 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641 if (ud->flags & UNIT_DIRECTORY_VENDOR_ID) {
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200642 if (device_create_file(dev, &dev_attr_ud_vendor_id))
643 goto fail;
644 if (ud->vendor_name_kv &&
645 device_create_file(dev, &dev_attr_ud_vendor_name_kv))
646 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648 if (ud->flags & UNIT_DIRECTORY_MODEL_ID) {
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200649 if (device_create_file(dev, &dev_attr_ud_model_id))
650 goto fail;
651 if (ud->model_name_kv &&
652 device_create_file(dev, &dev_attr_ud_model_name_kv))
653 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654 }
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200655 return;
656fail:
Stefan Richter9be51c52007-03-30 19:21:05 +0200657 HPSB_ERR("Failed to add sysfs attribute");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658}
659
660
661static int nodemgr_bus_match(struct device * dev, struct device_driver * drv)
662{
Stefan Richterd41bba22006-11-22 21:28:19 +0100663 struct hpsb_protocol_driver *driver;
664 struct unit_directory *ud;
Stefan Richterc6409462009-02-15 23:11:38 +0100665 const struct ieee1394_device_id *id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666
667 /* We only match unit directories */
668 if (dev->platform_data != &nodemgr_ud_platform_data)
669 return 0;
670
671 ud = container_of(dev, struct unit_directory, device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672 if (ud->ne->in_limbo || ud->ignore_driver)
673 return 0;
674
Stefan Richter8252bbb2006-11-22 21:09:42 +0100675 /* We only match drivers of type hpsb_protocol_driver */
676 if (drv == &nodemgr_mid_layer_driver)
677 return 0;
678
679 driver = container_of(drv, struct hpsb_protocol_driver, driver);
Stefan Richterd2ace292008-02-18 21:11:07 +0100680 id = driver->id_table;
681 if (!id)
682 return 0;
683
684 for (; id->match_flags != 0; id++) {
Stefan Richterd41bba22006-11-22 21:28:19 +0100685 if ((id->match_flags & IEEE1394_MATCH_VENDOR_ID) &&
686 id->vendor_id != ud->vendor_id)
687 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688
Stefan Richterd41bba22006-11-22 21:28:19 +0100689 if ((id->match_flags & IEEE1394_MATCH_MODEL_ID) &&
690 id->model_id != ud->model_id)
691 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692
Stefan Richterd41bba22006-11-22 21:28:19 +0100693 if ((id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) &&
694 id->specifier_id != ud->specifier_id)
695 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696
Stefan Richterd41bba22006-11-22 21:28:19 +0100697 if ((id->match_flags & IEEE1394_MATCH_VERSION) &&
698 id->version != ud->version)
699 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700
701 return 1;
Stefan Richterd41bba22006-11-22 21:28:19 +0100702 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703
704 return 0;
705}
706
707
Stefan Richterb07375b2006-10-22 16:16:27 +0200708static DEFINE_MUTEX(nodemgr_serialize_remove_uds);
709
Stefan Richter11305c32008-08-19 21:29:23 +0200710static int match_ne(struct device *dev, void *data)
Dave Young73cf6022008-01-22 13:56:32 +0800711{
712 struct unit_directory *ud;
Stefan Richter11305c32008-08-19 21:29:23 +0200713 struct node_entry *ne = data;
Dave Young73cf6022008-01-22 13:56:32 +0800714
715 ud = container_of(dev, struct unit_directory, unit_dev);
716 return ud->ne == ne;
717}
718
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719static void nodemgr_remove_uds(struct node_entry *ne)
720{
Kay Sieversdd7f2922007-05-25 11:50:53 +0200721 struct device *dev;
Dave Young73cf6022008-01-22 13:56:32 +0800722 struct unit_directory *ud;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723
Dave Young73cf6022008-01-22 13:56:32 +0800724 /* Use class_find device to iterate the devices. Since this code
725 * may be called from other contexts besides the knodemgrds,
726 * protect it by nodemgr_serialize_remove_uds.
Stefan Richterb07375b2006-10-22 16:16:27 +0200727 */
Stefan Richterb07375b2006-10-22 16:16:27 +0200728 mutex_lock(&nodemgr_serialize_remove_uds);
Stefan Richter1e4f7bc2006-12-02 22:23:34 +0100729 for (;;) {
Stefan Richter11305c32008-08-19 21:29:23 +0200730 dev = class_find_device(&nodemgr_ud_class, NULL, ne, match_ne);
Dave Young73cf6022008-01-22 13:56:32 +0800731 if (!dev)
Stefan Richter1e4f7bc2006-12-02 22:23:34 +0100732 break;
Dave Young73cf6022008-01-22 13:56:32 +0800733 ud = container_of(dev, struct unit_directory, unit_dev);
734 put_device(dev);
Kay Sieversdd7f2922007-05-25 11:50:53 +0200735 device_unregister(&ud->unit_dev);
Stefan Richter1e4f7bc2006-12-02 22:23:34 +0100736 device_unregister(&ud->device);
Stefan Richterb07375b2006-10-22 16:16:27 +0200737 }
Stefan Richterb07375b2006-10-22 16:16:27 +0200738 mutex_unlock(&nodemgr_serialize_remove_uds);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739}
740
741
742static void nodemgr_remove_ne(struct node_entry *ne)
743{
Stefan Richtercec1a312006-11-18 23:16:11 +0100744 struct device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745
746 dev = get_device(&ne->device);
747 if (!dev)
748 return;
749
750 HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
751 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752 nodemgr_remove_uds(ne);
753
Kay Sieversdd7f2922007-05-25 11:50:53 +0200754 device_unregister(&ne->node_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755 device_unregister(dev);
756
757 put_device(dev);
758}
759
Stefan Richter11305c32008-08-19 21:29:23 +0200760static int remove_host_dev(struct device *dev, void *data)
gregkh@suse.de643603222005-03-25 11:45:31 -0800761{
Kay Sieversdd7f2922007-05-25 11:50:53 +0200762 if (dev->bus == &ieee1394_bus_type)
763 nodemgr_remove_ne(container_of(dev, struct node_entry,
764 device));
gregkh@suse.de643603222005-03-25 11:45:31 -0800765 return 0;
766}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767
768static void nodemgr_remove_host_dev(struct device *dev)
769{
Stefan Richter11305c32008-08-19 21:29:23 +0200770 device_for_each_child(dev, NULL, remove_host_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771 sysfs_remove_link(&dev->kobj, "irm_id");
772 sysfs_remove_link(&dev->kobj, "busmgr_id");
773 sysfs_remove_link(&dev->kobj, "host_id");
774}
775
776
777static void nodemgr_update_bus_options(struct node_entry *ne)
778{
779#ifdef CONFIG_IEEE1394_VERBOSEDEBUG
780 static const u16 mr[] = { 4, 64, 1024, 0};
781#endif
782 quadlet_t busoptions = be32_to_cpu(ne->csr->bus_info_data[2]);
783
Stefan Richterd41bba22006-11-22 21:28:19 +0100784 ne->busopt.irmc = (busoptions >> 31) & 1;
785 ne->busopt.cmc = (busoptions >> 30) & 1;
786 ne->busopt.isc = (busoptions >> 29) & 1;
787 ne->busopt.bmc = (busoptions >> 28) & 1;
788 ne->busopt.pmc = (busoptions >> 27) & 1;
789 ne->busopt.cyc_clk_acc = (busoptions >> 16) & 0xff;
790 ne->busopt.max_rec = 1 << (((busoptions >> 12) & 0xf) + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700791 ne->busopt.max_rom = (busoptions >> 8) & 0x3;
Stefan Richterd41bba22006-11-22 21:28:19 +0100792 ne->busopt.generation = (busoptions >> 4) & 0xf;
793 ne->busopt.lnkspd = busoptions & 0x7;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794
795 HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d "
796 "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d",
797 busoptions, ne->busopt.irmc, ne->busopt.cmc,
798 ne->busopt.isc, ne->busopt.bmc, ne->busopt.pmc,
799 ne->busopt.cyc_clk_acc, ne->busopt.max_rec,
800 mr[ne->busopt.max_rom],
801 ne->busopt.generation, ne->busopt.lnkspd);
802}
803
804
Stefan Richter11305c32008-08-19 21:29:23 +0200805static struct node_entry *nodemgr_create_node(octlet_t guid,
806 struct csr1212_csr *csr, struct hpsb_host *host,
807 nodeid_t nodeid, unsigned int generation)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808{
Stefan Richter85511582005-11-07 06:31:45 -0500809 struct node_entry *ne;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810
Stefan Richter85511582005-11-07 06:31:45 -0500811 ne = kzalloc(sizeof(*ne), GFP_KERNEL);
812 if (!ne)
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200813 goto fail_alloc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814
Stefan Richter85511582005-11-07 06:31:45 -0500815 ne->host = host;
816 ne->nodeid = nodeid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817 ne->generation = generation;
Stefan Richter68484082008-08-16 13:36:47 +0200818 ne->needs_probe = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819
Stefan Richter85511582005-11-07 06:31:45 -0500820 ne->guid = guid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821 ne->guid_vendor_id = (guid >> 40) & 0xffffff;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822 ne->csr = csr;
823
824 memcpy(&ne->device, &nodemgr_dev_template_ne,
825 sizeof(ne->device));
826 ne->device.parent = &host->device;
Kay Sievers233976e2008-10-30 01:49:20 +0100827 dev_set_name(&ne->device, "%016Lx", (unsigned long long)(ne->guid));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828
Kay Sieversdd7f2922007-05-25 11:50:53 +0200829 ne->node_dev.parent = &ne->device;
830 ne->node_dev.class = &nodemgr_ne_class;
Kay Sievers233976e2008-10-30 01:49:20 +0100831 dev_set_name(&ne->node_dev, "%016Lx", (unsigned long long)(ne->guid));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200833 if (device_register(&ne->device))
834 goto fail_devreg;
Kay Sieversdd7f2922007-05-25 11:50:53 +0200835 if (device_register(&ne->node_dev))
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200836 goto fail_classdevreg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837 get_device(&ne->device);
838
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839 nodemgr_create_ne_dev_files(ne);
840
841 nodemgr_update_bus_options(ne);
842
843 HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
844 (host->node_id == nodeid) ? "Host" : "Node",
845 NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
846
Stefan Richter85511582005-11-07 06:31:45 -0500847 return ne;
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200848
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200849fail_classdevreg:
850 device_unregister(&ne->device);
851fail_devreg:
852 kfree(ne);
853fail_alloc:
854 HPSB_ERR("Failed to create node ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
855 NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
856
857 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858}
859
Stefan Richter11305c32008-08-19 21:29:23 +0200860static int match_ne_guid(struct device *dev, void *data)
Dave Young73cf6022008-01-22 13:56:32 +0800861{
862 struct node_entry *ne;
Stefan Richter11305c32008-08-19 21:29:23 +0200863 u64 *guid = data;
Dave Young73cf6022008-01-22 13:56:32 +0800864
865 ne = container_of(dev, struct node_entry, node_dev);
866 return ne->guid == *guid;
867}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868
869static struct node_entry *find_entry_by_guid(u64 guid)
870{
Kay Sieversdd7f2922007-05-25 11:50:53 +0200871 struct device *dev;
Dave Young73cf6022008-01-22 13:56:32 +0800872 struct node_entry *ne;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700873
Stefan Richter11305c32008-08-19 21:29:23 +0200874 dev = class_find_device(&nodemgr_ne_class, NULL, &guid, match_ne_guid);
Dave Young73cf6022008-01-22 13:56:32 +0800875 if (!dev)
876 return NULL;
877 ne = container_of(dev, struct node_entry, node_dev);
878 put_device(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879
Dave Young73cf6022008-01-22 13:56:32 +0800880 return ne;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700881}
882
Stefan Richter11305c32008-08-19 21:29:23 +0200883struct match_nodeid_parameter {
Dave Young73cf6022008-01-22 13:56:32 +0800884 struct hpsb_host *host;
885 nodeid_t nodeid;
886};
887
Stefan Richter11305c32008-08-19 21:29:23 +0200888static int match_ne_nodeid(struct device *dev, void *data)
Dave Young73cf6022008-01-22 13:56:32 +0800889{
890 int found = 0;
891 struct node_entry *ne;
Stefan Richter11305c32008-08-19 21:29:23 +0200892 struct match_nodeid_parameter *p = data;
Dave Young73cf6022008-01-22 13:56:32 +0800893
894 if (!dev)
895 goto ret;
896 ne = container_of(dev, struct node_entry, node_dev);
Stefan Richter11305c32008-08-19 21:29:23 +0200897 if (ne->host == p->host && ne->nodeid == p->nodeid)
Dave Young73cf6022008-01-22 13:56:32 +0800898 found = 1;
899ret:
900 return found;
901}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902
Stefan Richterb07375b2006-10-22 16:16:27 +0200903static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host,
904 nodeid_t nodeid)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905{
Kay Sieversdd7f2922007-05-25 11:50:53 +0200906 struct device *dev;
Dave Young73cf6022008-01-22 13:56:32 +0800907 struct node_entry *ne;
Stefan Richter11305c32008-08-19 21:29:23 +0200908 struct match_nodeid_parameter p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700909
Stefan Richter11305c32008-08-19 21:29:23 +0200910 p.host = host;
911 p.nodeid = nodeid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700912
Stefan Richter11305c32008-08-19 21:29:23 +0200913 dev = class_find_device(&nodemgr_ne_class, NULL, &p, match_ne_nodeid);
Dave Young73cf6022008-01-22 13:56:32 +0800914 if (!dev)
915 return NULL;
916 ne = container_of(dev, struct node_entry, node_dev);
917 put_device(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918
Dave Young73cf6022008-01-22 13:56:32 +0800919 return ne;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920}
921
922
923static void nodemgr_register_device(struct node_entry *ne,
924 struct unit_directory *ud, struct device *parent)
925{
926 memcpy(&ud->device, &nodemgr_dev_template_ud,
927 sizeof(ud->device));
928
929 ud->device.parent = parent;
930
Kay Sievers233976e2008-10-30 01:49:20 +0100931 dev_set_name(&ud->device, "%s-%u", dev_name(&ne->device), ud->id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700932
Kay Sieversdd7f2922007-05-25 11:50:53 +0200933 ud->unit_dev.parent = &ud->device;
934 ud->unit_dev.class = &nodemgr_ud_class;
Kay Sievers233976e2008-10-30 01:49:20 +0100935 dev_set_name(&ud->unit_dev, "%s-%u", dev_name(&ne->device), ud->id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200937 if (device_register(&ud->device))
938 goto fail_devreg;
Kay Sieversdd7f2922007-05-25 11:50:53 +0200939 if (device_register(&ud->unit_dev))
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200940 goto fail_classdevreg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941 get_device(&ud->device);
942
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943 nodemgr_create_ud_dev_files(ud);
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200944
945 return;
946
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200947fail_classdevreg:
948 device_unregister(&ud->device);
949fail_devreg:
Kay Sievers233976e2008-10-30 01:49:20 +0100950 HPSB_ERR("Failed to create unit %s", dev_name(&ud->device));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951}
952
953
954/* This implementation currently only scans the config rom and its
955 * immediate unit directories looking for software_id and
956 * software_version entries, in order to get driver autoloading working. */
957static struct unit_directory *nodemgr_process_unit_directory
Stefan Richter11305c32008-08-19 21:29:23 +0200958 (struct node_entry *ne, struct csr1212_keyval *ud_kv,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959 unsigned int *id, struct unit_directory *parent)
960{
961 struct unit_directory *ud;
962 struct unit_directory *ud_child = NULL;
963 struct csr1212_dentry *dentry;
964 struct csr1212_keyval *kv;
965 u8 last_key_id = 0;
966
Stefan Richter85511582005-11-07 06:31:45 -0500967 ud = kzalloc(sizeof(*ud), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968 if (!ud)
969 goto unit_directory_error;
970
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971 ud->ne = ne;
972 ud->ignore_driver = ignore_drivers;
Stefan Richtera52938f2007-05-27 13:11:47 +0200973 ud->address = ud_kv->offset + CSR1212_REGISTER_SPACE_BASE;
Stefan Richterd7794c82007-05-27 13:17:15 +0200974 ud->directory_id = ud->address & 0xffffff;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700975 ud->ud_kv = ud_kv;
976 ud->id = (*id)++;
977
Stefan Richter9c939e42008-08-27 01:24:25 +0200978 /* inherit vendor_id from root directory if none exists in unit dir */
979 ud->vendor_id = ne->vendor_id;
980
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981 csr1212_for_each_dir_entry(ne->csr, kv, ud_kv, dentry) {
982 switch (kv->key.id) {
983 case CSR1212_KV_ID_VENDOR:
984 if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
985 ud->vendor_id = kv->value.immediate;
986 ud->flags |= UNIT_DIRECTORY_VENDOR_ID;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700987 }
988 break;
989
990 case CSR1212_KV_ID_MODEL:
991 ud->model_id = kv->value.immediate;
992 ud->flags |= UNIT_DIRECTORY_MODEL_ID;
993 break;
994
995 case CSR1212_KV_ID_SPECIFIER_ID:
996 ud->specifier_id = kv->value.immediate;
997 ud->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
998 break;
999
1000 case CSR1212_KV_ID_VERSION:
1001 ud->version = kv->value.immediate;
1002 ud->flags |= UNIT_DIRECTORY_VERSION;
1003 break;
1004
1005 case CSR1212_KV_ID_DESCRIPTOR:
1006 if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
1007 CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
1008 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
1009 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
1010 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
1011 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
1012 switch (last_key_id) {
1013 case CSR1212_KV_ID_VENDOR:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001014 csr1212_keep_keyval(kv);
Stefan Richter17a19b72007-09-15 14:50:25 +02001015 ud->vendor_name_kv = kv;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001016 break;
1017
1018 case CSR1212_KV_ID_MODEL:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019 csr1212_keep_keyval(kv);
Stefan Richter17a19b72007-09-15 14:50:25 +02001020 ud->model_name_kv = kv;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021 break;
1022
1023 }
1024 } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */
1025 break;
1026
1027 case CSR1212_KV_ID_DEPENDENT_INFO:
1028 /* Logical Unit Number */
1029 if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
1030 if (ud->flags & UNIT_DIRECTORY_HAS_LUN) {
Eric Sesterhennbfe89d72006-10-29 23:13:40 +03001031 ud_child = kmemdup(ud, sizeof(*ud_child), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001032 if (!ud_child)
1033 goto unit_directory_error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001034 nodemgr_register_device(ne, ud_child, &ne->device);
1035 ud_child = NULL;
1036
1037 ud->id = (*id)++;
1038 }
1039 ud->lun = kv->value.immediate;
1040 ud->flags |= UNIT_DIRECTORY_HAS_LUN;
1041
1042 /* Logical Unit Directory */
1043 } else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) {
1044 /* This should really be done in SBP2 as this is
1045 * doing SBP2 specific parsing.
1046 */
1047
1048 /* first register the parent unit */
1049 ud->flags |= UNIT_DIRECTORY_HAS_LUN_DIRECTORY;
1050 if (ud->device.bus != &ieee1394_bus_type)
1051 nodemgr_register_device(ne, ud, &ne->device);
1052
1053 /* process the child unit */
Stefan Richter11305c32008-08-19 21:29:23 +02001054 ud_child = nodemgr_process_unit_directory(ne, kv, id, ud);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001055
1056 if (ud_child == NULL)
1057 break;
1058
Kay Sievers312c0042005-11-16 09:00:00 +01001059 /* inherit unspecified values, the driver core picks it up */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001060 if ((ud->flags & UNIT_DIRECTORY_MODEL_ID) &&
1061 !(ud_child->flags & UNIT_DIRECTORY_MODEL_ID))
1062 {
1063 ud_child->flags |= UNIT_DIRECTORY_MODEL_ID;
1064 ud_child->model_id = ud->model_id;
1065 }
1066 if ((ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) &&
1067 !(ud_child->flags & UNIT_DIRECTORY_SPECIFIER_ID))
1068 {
1069 ud_child->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
1070 ud_child->specifier_id = ud->specifier_id;
1071 }
1072 if ((ud->flags & UNIT_DIRECTORY_VERSION) &&
1073 !(ud_child->flags & UNIT_DIRECTORY_VERSION))
1074 {
1075 ud_child->flags |= UNIT_DIRECTORY_VERSION;
1076 ud_child->version = ud->version;
1077 }
1078
1079 /* register the child unit */
1080 ud_child->flags |= UNIT_DIRECTORY_LUN_DIRECTORY;
1081 nodemgr_register_device(ne, ud_child, &ud->device);
1082 }
1083
1084 break;
1085
Stefan Richterd7794c82007-05-27 13:17:15 +02001086 case CSR1212_KV_ID_DIRECTORY_ID:
1087 ud->directory_id = kv->value.immediate;
1088 break;
1089
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090 default:
1091 break;
1092 }
1093 last_key_id = kv->key.id;
1094 }
1095
1096 /* do not process child units here and only if not already registered */
1097 if (!parent && ud->device.bus != &ieee1394_bus_type)
1098 nodemgr_register_device(ne, ud, &ne->device);
1099
1100 return ud;
1101
1102unit_directory_error:
Jody McIntyre616b8592005-05-16 21:54:01 -07001103 kfree(ud);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001104 return NULL;
1105}
1106
1107
Stefan Richter11305c32008-08-19 21:29:23 +02001108static void nodemgr_process_root_directory(struct node_entry *ne)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001109{
1110 unsigned int ud_id = 0;
1111 struct csr1212_dentry *dentry;
Stefan Richter638d5bb2007-09-15 14:45:53 +02001112 struct csr1212_keyval *kv, *vendor_name_kv = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113 u8 last_key_id = 0;
1114
Stefan Richter68484082008-08-16 13:36:47 +02001115 ne->needs_probe = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116
1117 csr1212_for_each_dir_entry(ne->csr, kv, ne->csr->root_kv, dentry) {
1118 switch (kv->key.id) {
1119 case CSR1212_KV_ID_VENDOR:
1120 ne->vendor_id = kv->value.immediate;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001121 break;
1122
1123 case CSR1212_KV_ID_NODE_CAPABILITIES:
1124 ne->capabilities = kv->value.immediate;
1125 break;
1126
1127 case CSR1212_KV_ID_UNIT:
Stefan Richter11305c32008-08-19 21:29:23 +02001128 nodemgr_process_unit_directory(ne, kv, &ud_id, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001129 break;
1130
1131 case CSR1212_KV_ID_DESCRIPTOR:
1132 if (last_key_id == CSR1212_KV_ID_VENDOR) {
1133 if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
1134 CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
1135 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
1136 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
1137 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
1138 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139 csr1212_keep_keyval(kv);
Stefan Richter638d5bb2007-09-15 14:45:53 +02001140 vendor_name_kv = kv;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001141 }
1142 }
1143 break;
1144 }
1145 last_key_id = kv->key.id;
1146 }
1147
Stefan Richter93245472007-03-30 19:19:55 +02001148 if (ne->vendor_name_kv) {
Stefan Richter638d5bb2007-09-15 14:45:53 +02001149 kv = ne->vendor_name_kv;
1150 ne->vendor_name_kv = vendor_name_kv;
1151 csr1212_release_keyval(kv);
1152 } else if (vendor_name_kv) {
1153 ne->vendor_name_kv = vendor_name_kv;
1154 if (device_create_file(&ne->device,
1155 &dev_attr_ne_vendor_name_kv) != 0)
Stefan Richter9be51c52007-03-30 19:21:05 +02001156 HPSB_ERR("Failed to add sysfs attribute");
Stefan Richter93245472007-03-30 19:19:55 +02001157 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001158}
1159
1160#ifdef CONFIG_HOTPLUG
1161
Kay Sievers7eff2e72007-08-14 15:15:12 +02001162static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001163{
1164 struct unit_directory *ud;
Eric Rannaudbf624562007-03-30 22:23:12 -07001165 int retval = 0;
Olaf Hering9b19d852005-09-06 15:18:18 -07001166 /* ieee1394:venNmoNspNverN */
1167 char buf[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001168
Kay Sieversdd7f2922007-05-25 11:50:53 +02001169 if (!dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001170 return -ENODEV;
1171
Kay Sieversdd7f2922007-05-25 11:50:53 +02001172 ud = container_of(dev, struct unit_directory, unit_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001173
1174 if (ud->ne->in_limbo || ud->ignore_driver)
1175 return -ENODEV;
1176
1177#define PUT_ENVP(fmt,val) \
1178do { \
Kay Sievers7eff2e72007-08-14 15:15:12 +02001179 retval = add_uevent_var(env, fmt, val); \
Eric Rannaudbf624562007-03-30 22:23:12 -07001180 if (retval) \
1181 return retval; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001182} while (0)
1183
1184 PUT_ENVP("VENDOR_ID=%06x", ud->vendor_id);
1185 PUT_ENVP("MODEL_ID=%06x", ud->model_id);
1186 PUT_ENVP("GUID=%016Lx", (unsigned long long)ud->ne->guid);
1187 PUT_ENVP("SPECIFIER_ID=%06x", ud->specifier_id);
1188 PUT_ENVP("VERSION=%06x", ud->version);
Olaf Hering9b19d852005-09-06 15:18:18 -07001189 snprintf(buf, sizeof(buf), "ieee1394:ven%08Xmo%08Xsp%08Xver%08X",
1190 ud->vendor_id,
1191 ud->model_id,
1192 ud->specifier_id,
1193 ud->version);
1194 PUT_ENVP("MODALIAS=%s", buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001195
1196#undef PUT_ENVP
1197
Linus Torvalds1da177e2005-04-16 15:20:36 -07001198 return 0;
1199}
1200
1201#else
1202
Kay Sievers7eff2e72007-08-14 15:15:12 +02001203static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001204{
1205 return -ENODEV;
1206}
1207
1208#endif /* CONFIG_HOTPLUG */
1209
1210
Ben Collinsed30c262006-11-23 13:59:48 -05001211int __hpsb_register_protocol(struct hpsb_protocol_driver *drv,
1212 struct module *owner)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001213{
Ben Collinsed30c262006-11-23 13:59:48 -05001214 int error;
1215
1216 drv->driver.bus = &ieee1394_bus_type;
1217 drv->driver.owner = owner;
1218 drv->driver.name = drv->name;
1219
Linus Torvalds1da177e2005-04-16 15:20:36 -07001220 /* This will cause a probe for devices */
Ben Collinsed30c262006-11-23 13:59:48 -05001221 error = driver_register(&drv->driver);
Stefan Richter7fdfc902006-10-21 01:23:56 +02001222 if (!error)
Ben Collinsed30c262006-11-23 13:59:48 -05001223 nodemgr_create_drv_files(drv);
Stefan Richter7fdfc902006-10-21 01:23:56 +02001224 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001225}
1226
1227void hpsb_unregister_protocol(struct hpsb_protocol_driver *driver)
1228{
1229 nodemgr_remove_drv_files(driver);
1230 /* This will subsequently disconnect all devices that our driver
1231 * is attached to. */
1232 driver_unregister(&driver->driver);
1233}
1234
1235
1236/*
1237 * This function updates nodes that were present on the bus before the
1238 * reset and still are after the reset. The nodeid and the config rom
1239 * may have changed, and the drivers managing this device must be
1240 * informed that this device just went through a bus reset, to allow
1241 * the to take whatever actions required.
1242 */
1243static void nodemgr_update_node(struct node_entry *ne, struct csr1212_csr *csr,
Stefan Richter11305c32008-08-19 21:29:23 +02001244 nodeid_t nodeid, unsigned int generation)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001245{
1246 if (ne->nodeid != nodeid) {
1247 HPSB_DEBUG("Node changed: " NODE_BUS_FMT " -> " NODE_BUS_FMT,
1248 NODE_BUS_ARGS(ne->host, ne->nodeid),
1249 NODE_BUS_ARGS(ne->host, nodeid));
1250 ne->nodeid = nodeid;
1251 }
1252
1253 if (ne->busopt.generation != ((be32_to_cpu(csr->bus_info_data[2]) >> 4) & 0xf)) {
1254 kfree(ne->csr->private);
1255 csr1212_destroy_csr(ne->csr);
1256 ne->csr = csr;
1257
1258 /* If the node's configrom generation has changed, we
1259 * unregister all the unit directories. */
1260 nodemgr_remove_uds(ne);
1261
1262 nodemgr_update_bus_options(ne);
1263
1264 /* Mark the node as new, so it gets re-probed */
Stefan Richter68484082008-08-16 13:36:47 +02001265 ne->needs_probe = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266 } else {
1267 /* old cache is valid, so update its generation */
1268 struct nodemgr_csr_info *ci = ne->csr->private;
1269 ci->generation = generation;
1270 /* free the partially filled now unneeded new cache */
1271 kfree(csr->private);
1272 csr1212_destroy_csr(csr);
1273 }
1274
Stefan Richter29f8ea82008-08-27 01:18:32 +02001275 /* Finally, mark the node current */
1276 smp_wmb();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001277 ne->generation = generation;
Stefan Richterfc392fe2008-08-19 21:30:17 +02001278
1279 if (ne->in_limbo) {
1280 device_remove_file(&ne->device, &dev_attr_ne_in_limbo);
1281 ne->in_limbo = false;
1282
1283 HPSB_DEBUG("Node reactivated: "
1284 "ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
1285 NODE_BUS_ARGS(ne->host, ne->nodeid),
1286 (unsigned long long)ne->guid);
1287 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001288}
1289
Stefan Richter11305c32008-08-19 21:29:23 +02001290static void nodemgr_node_scan_one(struct hpsb_host *host,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001291 nodeid_t nodeid, int generation)
1292{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001293 struct node_entry *ne;
1294 octlet_t guid;
1295 struct csr1212_csr *csr;
1296 struct nodemgr_csr_info *ci;
Stefan Richterd7530a12006-07-03 00:58:01 +02001297 u8 *speed;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001298
Stefan Richter85511582005-11-07 06:31:45 -05001299 ci = kmalloc(sizeof(*ci), GFP_KERNEL);
Vegard Nossum004cdb52008-09-10 15:15:23 +02001300 kmemcheck_annotate_bitfield(ci, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001301 if (!ci)
1302 return;
1303
1304 ci->host = host;
1305 ci->nodeid = nodeid;
1306 ci->generation = generation;
Stefan Richterd7530a12006-07-03 00:58:01 +02001307
1308 /* Prepare for speed probe which occurs when reading the ROM */
1309 speed = &(host->speed[NODEID_TO_NODE(nodeid)]);
1310 if (*speed > host->csr.lnk_spd)
1311 *speed = host->csr.lnk_spd;
1312 ci->speed_unverified = *speed > IEEE1394_SPEED_100;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313
1314 /* We need to detect when the ConfigROM's generation has changed,
1315 * so we only update the node's info when it needs to be. */
1316
1317 csr = csr1212_create_csr(&nodemgr_csr_ops, 5 * sizeof(quadlet_t), ci);
1318 if (!csr || csr1212_parse_csr(csr) != CSR1212_SUCCESS) {
1319 HPSB_ERR("Error parsing configrom for node " NODE_BUS_FMT,
1320 NODE_BUS_ARGS(host, nodeid));
1321 if (csr)
1322 csr1212_destroy_csr(csr);
1323 kfree(ci);
1324 return;
1325 }
1326
1327 if (csr->bus_info_data[1] != IEEE1394_BUSID_MAGIC) {
1328 /* This isn't a 1394 device, but we let it slide. There
1329 * was a report of a device with broken firmware which
1330 * reported '2394' instead of '1394', which is obviously a
1331 * mistake. One would hope that a non-1394 device never
1332 * gets connected to Firewire bus. If someone does, we
1333 * shouldn't be held responsible, so we'll allow it with a
1334 * warning. */
1335 HPSB_WARN("Node " NODE_BUS_FMT " has invalid busID magic [0x%08x]",
1336 NODE_BUS_ARGS(host, nodeid), csr->bus_info_data[1]);
1337 }
1338
1339 guid = ((u64)be32_to_cpu(csr->bus_info_data[3]) << 32) | be32_to_cpu(csr->bus_info_data[4]);
1340 ne = find_entry_by_guid(guid);
1341
1342 if (ne && ne->host != host && ne->in_limbo) {
1343 /* Must have moved this device from one host to another */
1344 nodemgr_remove_ne(ne);
1345 ne = NULL;
1346 }
1347
1348 if (!ne)
Stefan Richter11305c32008-08-19 21:29:23 +02001349 nodemgr_create_node(guid, csr, host, nodeid, generation);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001350 else
Stefan Richter11305c32008-08-19 21:29:23 +02001351 nodemgr_update_node(ne, csr, nodeid, generation);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001352}
1353
1354
Stefan Richter11305c32008-08-19 21:29:23 +02001355static void nodemgr_node_scan(struct hpsb_host *host, int generation)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001356{
Stefan Richterd41bba22006-11-22 21:28:19 +01001357 int count;
Stefan Richterd41bba22006-11-22 21:28:19 +01001358 struct selfid *sid = (struct selfid *)host->topology_map;
1359 nodeid_t nodeid = LOCAL_BUS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001360
Stefan Richterd41bba22006-11-22 21:28:19 +01001361 /* Scan each node on the bus */
1362 for (count = host->selfid_count; count; count--, sid++) {
1363 if (sid->extended)
1364 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001365
Stefan Richterd41bba22006-11-22 21:28:19 +01001366 if (!sid->link_active) {
1367 nodeid++;
1368 continue;
1369 }
Stefan Richter11305c32008-08-19 21:29:23 +02001370 nodemgr_node_scan_one(host, nodeid++, generation);
Stefan Richterd41bba22006-11-22 21:28:19 +01001371 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001372}
1373
Stefan Richter11305c32008-08-19 21:29:23 +02001374static void nodemgr_pause_ne(struct node_entry *ne)
1375{
Stefan Richterfc392fe2008-08-19 21:30:17 +02001376 HPSB_DEBUG("Node paused: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
Stefan Richter11305c32008-08-19 21:29:23 +02001377 NODE_BUS_ARGS(ne->host, ne->nodeid),
1378 (unsigned long long)ne->guid);
1379
Stefan Richterfc392fe2008-08-19 21:30:17 +02001380 ne->in_limbo = true;
Stefan Richter11305c32008-08-19 21:29:23 +02001381 WARN_ON(device_create_file(&ne->device, &dev_attr_ne_in_limbo));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001382}
1383
Stefan Richter11305c32008-08-19 21:29:23 +02001384static int update_pdrv(struct device *dev, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001385{
Stefan Richtera0e857e2007-06-17 23:47:45 +02001386 struct unit_directory *ud;
1387 struct device_driver *drv;
1388 struct hpsb_protocol_driver *pdrv;
Stefan Richter11305c32008-08-19 21:29:23 +02001389 struct node_entry *ne = data;
Stefan Richtera0e857e2007-06-17 23:47:45 +02001390 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001391
Dave Young73cf6022008-01-22 13:56:32 +08001392 ud = container_of(dev, struct unit_directory, unit_dev);
1393 if (ud->ne == ne) {
Stefan Richtera0e857e2007-06-17 23:47:45 +02001394 drv = get_driver(ud->device.driver);
Dave Young73cf6022008-01-22 13:56:32 +08001395 if (drv) {
1396 error = 0;
1397 pdrv = container_of(drv, struct hpsb_protocol_driver,
1398 driver);
1399 if (pdrv->update) {
1400 down(&ud->device.sem);
1401 error = pdrv->update(ud);
1402 up(&ud->device.sem);
1403 }
1404 if (error)
1405 device_release_driver(&ud->device);
1406 put_driver(drv);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001407 }
1408 }
Dave Young73cf6022008-01-22 13:56:32 +08001409
1410 return 0;
1411}
1412
1413static void nodemgr_update_pdrv(struct node_entry *ne)
1414{
Stefan Richter11305c32008-08-19 21:29:23 +02001415 class_for_each_device(&nodemgr_ud_class, NULL, ne, update_pdrv);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001416}
1417
Stefan Richter61c7f772005-12-05 16:28:59 -05001418/* Write the BROADCAST_CHANNEL as per IEEE1394a 8.3.2.3.11 and 8.4.2.3. This
1419 * seems like an optional service but in the end it is practically mandatory
1420 * as a consequence of these clauses.
1421 *
1422 * Note that we cannot do a broadcast write to all nodes at once because some
1423 * pre-1394a devices would hang. */
1424static void nodemgr_irm_write_bc(struct node_entry *ne, int generation)
1425{
1426 const u64 bc_addr = (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL);
1427 quadlet_t bc_remote, bc_local;
Stefan Richter7fdfc902006-10-21 01:23:56 +02001428 int error;
Stefan Richter61c7f772005-12-05 16:28:59 -05001429
1430 if (!ne->host->is_irm || ne->generation != generation ||
1431 ne->nodeid == ne->host->node_id)
1432 return;
1433
1434 bc_local = cpu_to_be32(ne->host->csr.broadcast_channel);
1435
1436 /* Check if the register is implemented and 1394a compliant. */
Stefan Richter7fdfc902006-10-21 01:23:56 +02001437 error = hpsb_read(ne->host, ne->nodeid, generation, bc_addr, &bc_remote,
1438 sizeof(bc_remote));
1439 if (!error && bc_remote & cpu_to_be32(0x80000000) &&
Stefan Richter61c7f772005-12-05 16:28:59 -05001440 bc_remote != bc_local)
1441 hpsb_node_write(ne, bc_addr, &bc_local, sizeof(bc_local));
1442}
1443
1444
Stefan Richter11305c32008-08-19 21:29:23 +02001445static void nodemgr_probe_ne(struct hpsb_host *host, struct node_entry *ne,
1446 int generation)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001447{
1448 struct device *dev;
1449
Stefan Richter11305c32008-08-19 21:29:23 +02001450 if (ne->host != host || ne->in_limbo)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001451 return;
1452
1453 dev = get_device(&ne->device);
1454 if (!dev)
1455 return;
1456
Stefan Richter61c7f772005-12-05 16:28:59 -05001457 nodemgr_irm_write_bc(ne, generation);
1458
Linus Torvalds1da177e2005-04-16 15:20:36 -07001459 /* If "needs_probe", then this is either a new or changed node we
1460 * rescan totally. If the generation matches for an existing node
1461 * (one that existed prior to the bus reset) we send update calls
1462 * down to the drivers. Otherwise, this is a dead node and we
1463 * suspend it. */
1464 if (ne->needs_probe)
Stefan Richter11305c32008-08-19 21:29:23 +02001465 nodemgr_process_root_directory(ne);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001466 else if (ne->generation == generation)
1467 nodemgr_update_pdrv(ne);
1468 else
Stefan Richter11305c32008-08-19 21:29:23 +02001469 nodemgr_pause_ne(ne);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001470
1471 put_device(dev);
1472}
1473
Stefan Richter11305c32008-08-19 21:29:23 +02001474struct node_probe_parameter {
1475 struct hpsb_host *host;
Dave Young73cf6022008-01-22 13:56:32 +08001476 int generation;
Stefan Richter68484082008-08-16 13:36:47 +02001477 bool probe_now;
Dave Young73cf6022008-01-22 13:56:32 +08001478};
1479
Stefan Richter68484082008-08-16 13:36:47 +02001480static int node_probe(struct device *dev, void *data)
Dave Young73cf6022008-01-22 13:56:32 +08001481{
Stefan Richter11305c32008-08-19 21:29:23 +02001482 struct node_probe_parameter *p = data;
Dave Young73cf6022008-01-22 13:56:32 +08001483 struct node_entry *ne;
1484
Stefan Richter11305c32008-08-19 21:29:23 +02001485 if (p->generation != get_hpsb_generation(p->host))
Stefan Richterc921a972008-08-16 13:38:11 +02001486 return -EAGAIN;
1487
Dave Young73cf6022008-01-22 13:56:32 +08001488 ne = container_of(dev, struct node_entry, node_dev);
Stefan Richter68484082008-08-16 13:36:47 +02001489 if (ne->needs_probe == p->probe_now)
Stefan Richter11305c32008-08-19 21:29:23 +02001490 nodemgr_probe_ne(p->host, ne, p->generation);
Dave Young73cf6022008-01-22 13:56:32 +08001491 return 0;
1492}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001493
Stefan Richterfc392fe2008-08-19 21:30:17 +02001494static int nodemgr_node_probe(struct hpsb_host *host, int generation)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001495{
Stefan Richter11305c32008-08-19 21:29:23 +02001496 struct node_probe_parameter p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001497
Stefan Richter11305c32008-08-19 21:29:23 +02001498 p.host = host;
Stefan Richter68484082008-08-16 13:36:47 +02001499 p.generation = generation;
Stefan Richterc921a972008-08-16 13:38:11 +02001500 /*
1501 * Do some processing of the nodes we've probed. This pulls them
Linus Torvalds1da177e2005-04-16 15:20:36 -07001502 * into the sysfs layer if needed, and can result in processing of
1503 * unit-directories, or just updating the node and it's
Stefan Richter51c1d802005-12-12 23:03:19 -05001504 * unit-directories.
1505 *
1506 * Run updates before probes. Usually, updates are time-critical
Stefan Richterc921a972008-08-16 13:38:11 +02001507 * while probes are time-consuming.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001508 *
Stefan Richterc921a972008-08-16 13:38:11 +02001509 * Meanwhile, another bus reset may have happened. In this case we
1510 * skip everything here and let the next bus scan handle it.
1511 * Otherwise we may prematurely remove nodes which are still there.
1512 */
1513 p.probe_now = false;
1514 if (class_for_each_device(&nodemgr_ne_class, NULL, &p, node_probe) != 0)
Stefan Richterfc392fe2008-08-19 21:30:17 +02001515 return 0;
Stefan Richterc921a972008-08-16 13:38:11 +02001516
1517 p.probe_now = true;
1518 if (class_for_each_device(&nodemgr_ne_class, NULL, &p, node_probe) != 0)
Stefan Richterfc392fe2008-08-19 21:30:17 +02001519 return 0;
Stefan Richterc921a972008-08-16 13:38:11 +02001520 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001521 * Now let's tell the bus to rescan our devices. This may seem
1522 * like overhead, but the driver-model core will only scan a
1523 * device for a driver when either the device is added, or when a
1524 * new driver is added. A bus reset is a good reason to rescan
1525 * devices that were there before. For example, an sbp2 device
1526 * may become available for login, if the host that held it was
Stefan Richterc921a972008-08-16 13:38:11 +02001527 * just removed.
1528 */
1529 if (bus_rescan_devices(&ieee1394_bus_type) != 0)
1530 HPSB_DEBUG("bus_rescan_devices had an error");
Stefan Richterfc392fe2008-08-19 21:30:17 +02001531
1532 return 1;
1533}
1534
1535static int remove_nodes_in_limbo(struct device *dev, void *data)
1536{
1537 struct node_entry *ne;
1538
1539 if (dev->bus != &ieee1394_bus_type)
1540 return 0;
1541
1542 ne = container_of(dev, struct node_entry, device);
1543 if (ne->in_limbo)
1544 nodemgr_remove_ne(ne);
1545
1546 return 0;
1547}
1548
1549static void nodemgr_remove_nodes_in_limbo(struct hpsb_host *host)
1550{
1551 device_for_each_child(&host->device, NULL, remove_nodes_in_limbo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001552}
1553
Stefan Richter14c0fa22005-12-01 18:51:52 -05001554static int nodemgr_send_resume_packet(struct hpsb_host *host)
1555{
1556 struct hpsb_packet *packet;
Stefan Richter7fdfc902006-10-21 01:23:56 +02001557 int error = -ENOMEM;
Stefan Richter14c0fa22005-12-01 18:51:52 -05001558
1559 packet = hpsb_make_phypacket(host,
Stefan Richterd7758462005-12-01 18:51:56 -05001560 EXTPHYPACKET_TYPE_RESUME |
1561 NODEID_TO_NODE(host->node_id) << PHYPACKET_PORT_SHIFT);
Stefan Richter14c0fa22005-12-01 18:51:52 -05001562 if (packet) {
1563 packet->no_waiter = 1;
1564 packet->generation = get_hpsb_generation(host);
Stefan Richter7fdfc902006-10-21 01:23:56 +02001565 error = hpsb_send_packet(packet);
Stefan Richter14c0fa22005-12-01 18:51:52 -05001566 }
Stefan Richter7fdfc902006-10-21 01:23:56 +02001567 if (error)
Stefan Richter14c0fa22005-12-01 18:51:52 -05001568 HPSB_WARN("fw-host%d: Failed to broadcast resume packet",
1569 host->id);
Stefan Richter7fdfc902006-10-21 01:23:56 +02001570 return error;
Stefan Richter14c0fa22005-12-01 18:51:52 -05001571}
1572
Stefan Richter61c7f772005-12-05 16:28:59 -05001573/* Perform a few high-level IRM responsibilities. */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001574static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles)
1575{
1576 quadlet_t bc;
1577
1578 /* if irm_id == -1 then there is no IRM on this bus */
1579 if (!host->is_irm || host->irm_id == (nodeid_t)-1)
1580 return 1;
1581
Stefan Richter61c7f772005-12-05 16:28:59 -05001582 /* We are a 1394a-2000 compliant IRM. Set the validity bit. */
1583 host->csr.broadcast_channel |= 0x40000000;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001584
1585 /* If there is no bus manager then we should set the root node's
1586 * force_root bit to promote bus stability per the 1394
1587 * spec. (8.4.2.6) */
1588 if (host->busmgr_id == 0xffff && host->node_count > 1)
1589 {
1590 u16 root_node = host->node_count - 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001591
Jody McIntyre328699b2005-09-30 11:59:08 -07001592 /* get cycle master capability flag from root node */
1593 if (host->is_cycmst ||
1594 (!hpsb_read(host, LOCAL_BUS | root_node, get_hpsb_generation(host),
1595 (CSR_REGISTER_BASE + CSR_CONFIG_ROM + 2 * sizeof(quadlet_t)),
1596 &bc, sizeof(quadlet_t)) &&
1597 be32_to_cpu(bc) & 1 << CSR_CMC_SHIFT))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001598 hpsb_send_phy_config(host, root_node, -1);
1599 else {
1600 HPSB_DEBUG("The root node is not cycle master capable; "
1601 "selecting a new root node and resetting...");
1602
1603 if (cycles >= 5) {
1604 /* Oh screw it! Just leave the bus as it is */
1605 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1606 return 1;
1607 }
1608
1609 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1610 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1611
1612 return 0;
1613 }
1614 }
1615
Stefan Richter14c0fa22005-12-01 18:51:52 -05001616 /* Some devices suspend their ports while being connected to an inactive
1617 * host adapter, i.e. if connected before the low-level driver is
1618 * loaded. They become visible either when physically unplugged and
1619 * replugged, or when receiving a resume packet. Send one once. */
1620 if (!host->resume_packet_sent && !nodemgr_send_resume_packet(host))
1621 host->resume_packet_sent = 1;
1622
Linus Torvalds1da177e2005-04-16 15:20:36 -07001623 return 1;
1624}
1625
1626/* We need to ensure that if we are not the IRM, that the IRM node is capable of
1627 * everything we can do, otherwise issue a bus reset and try to become the IRM
1628 * ourselves. */
1629static int nodemgr_check_irm_capability(struct hpsb_host *host, int cycles)
1630{
1631 quadlet_t bc;
1632 int status;
1633
1634 if (hpsb_disable_irm || host->is_irm)
1635 return 1;
1636
1637 status = hpsb_read(host, LOCAL_BUS | (host->irm_id),
1638 get_hpsb_generation(host),
1639 (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL),
1640 &bc, sizeof(quadlet_t));
1641
1642 if (status < 0 || !(be32_to_cpu(bc) & 0x80000000)) {
1643 /* The current irm node does not have a valid BROADCAST_CHANNEL
1644 * register and we do, so reset the bus with force_root set */
1645 HPSB_DEBUG("Current remote IRM is not 1394a-2000 compliant, resetting...");
1646
1647 if (cycles >= 5) {
1648 /* Oh screw it! Just leave the bus as it is */
1649 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1650 return 1;
1651 }
1652
1653 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1654 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1655
1656 return 0;
1657 }
1658
1659 return 1;
1660}
1661
Stefan Richter11305c32008-08-19 21:29:23 +02001662static int nodemgr_host_thread(void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001663{
Stefan Richter11305c32008-08-19 21:29:23 +02001664 struct hpsb_host *host = data;
Stefan Richterb7a71792006-10-06 19:49:52 +02001665 unsigned int g, generation = 0;
Stefan Richterd2f119f2006-07-03 12:02:35 -04001666 int i, reset_cycles = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001667
Rafael J. Wysocki83144182007-07-17 04:03:35 -07001668 set_freezable();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001669 /* Setup our device-model entries */
1670 nodemgr_create_host_dev_files(host);
1671
Stefan Richterd2f119f2006-07-03 12:02:35 -04001672 for (;;) {
1673 /* Sleep until next bus reset */
1674 set_current_state(TASK_INTERRUPTIBLE);
Stefan Richtera65421e2007-02-10 22:06:18 +01001675 if (get_hpsb_generation(host) == generation &&
1676 !kthread_should_stop())
Stefan Richterd2f119f2006-07-03 12:02:35 -04001677 schedule();
1678 __set_current_state(TASK_RUNNING);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001679
Stefan Richterd2f119f2006-07-03 12:02:35 -04001680 /* Thread may have been woken up to freeze or to exit */
1681 if (try_to_freeze())
1682 continue;
1683 if (kthread_should_stop())
1684 goto exit;
1685
Linus Torvalds1da177e2005-04-16 15:20:36 -07001686 /* Pause for 1/4 second in 1/16 second intervals,
1687 * to make sure things settle down. */
Stefan Richterd2f119f2006-07-03 12:02:35 -04001688 g = get_hpsb_generation(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001689 for (i = 0; i < 4 ; i++) {
Satyam Sharma69e2b602007-08-15 20:05:38 +05301690 msleep_interruptible(63);
Nigel Cunninghamec9a13c2008-12-09 22:40:20 +11001691 try_to_freeze();
Satyam Sharma69e2b602007-08-15 20:05:38 +05301692 if (kthread_should_stop())
Stefan Richtera0e857e2007-06-17 23:47:45 +02001693 goto exit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001694
1695 /* Now get the generation in which the node ID's we collect
1696 * are valid. During the bus scan we will use this generation
1697 * for the read transactions, so that if another reset occurs
1698 * during the scan the transactions will fail instead of
1699 * returning bogus data. */
1700 generation = get_hpsb_generation(host);
1701
1702 /* If we get a reset before we are done waiting, then
Michael Opdenacker59c51592007-05-09 08:57:56 +02001703 * start the waiting over again */
Stefan Richterd2f119f2006-07-03 12:02:35 -04001704 if (generation != g)
1705 g = generation, i = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001706 }
1707
Jody McIntyre328699b2005-09-30 11:59:08 -07001708 if (!nodemgr_check_irm_capability(host, reset_cycles) ||
1709 !nodemgr_do_irm_duties(host, reset_cycles)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001710 reset_cycles++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001711 continue;
1712 }
Jody McIntyre328699b2005-09-30 11:59:08 -07001713 reset_cycles = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001714
1715 /* Scan our nodes to get the bus options and create node
1716 * entries. This does not do the sysfs stuff, since that
Kay Sievers312c0042005-11-16 09:00:00 +01001717 * would trigger uevents and such, which is a bad idea at
1718 * this point. */
Stefan Richter11305c32008-08-19 21:29:23 +02001719 nodemgr_node_scan(host, generation);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001720
1721 /* This actually does the full probe, with sysfs
1722 * registration. */
Stefan Richterfc392fe2008-08-19 21:30:17 +02001723 if (!nodemgr_node_probe(host, generation))
1724 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001725
1726 /* Update some of our sysfs symlinks */
1727 nodemgr_update_host_dev_links(host);
Stefan Richterfc392fe2008-08-19 21:30:17 +02001728
1729 /* Sleep 3 seconds */
1730 for (i = 3000/200; i; i--) {
1731 msleep_interruptible(200);
Nigel Cunninghamec9a13c2008-12-09 22:40:20 +11001732 try_to_freeze();
Stefan Richterfc392fe2008-08-19 21:30:17 +02001733 if (kthread_should_stop())
1734 goto exit;
1735
1736 if (generation != get_hpsb_generation(host))
1737 break;
1738 }
1739 /* Remove nodes which are gone, unless a bus reset happened */
1740 if (!i)
1741 nodemgr_remove_nodes_in_limbo(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001742 }
Stefan Richterd2f119f2006-07-03 12:02:35 -04001743exit:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001744 HPSB_VERBOSE("NodeMgr: Exiting thread");
Stefan Richterd2f119f2006-07-03 12:02:35 -04001745 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001746}
1747
Stefan Richter11305c32008-08-19 21:29:23 +02001748struct per_host_parameter {
Dave Young73cf6022008-01-22 13:56:32 +08001749 void *data;
1750 int (*cb)(struct hpsb_host *, void *);
1751};
1752
Stefan Richter11305c32008-08-19 21:29:23 +02001753static int per_host(struct device *dev, void *data)
Dave Young73cf6022008-01-22 13:56:32 +08001754{
1755 struct hpsb_host *host;
Stefan Richter11305c32008-08-19 21:29:23 +02001756 struct per_host_parameter *p = data;
Dave Young73cf6022008-01-22 13:56:32 +08001757
1758 host = container_of(dev, struct hpsb_host, host_dev);
Stefan Richter11305c32008-08-19 21:29:23 +02001759 return p->cb(host, p->data);
Dave Young73cf6022008-01-22 13:56:32 +08001760}
Stefan Richter11305c32008-08-19 21:29:23 +02001761
Stefan Richterafd65462007-03-05 03:06:23 +01001762/**
1763 * nodemgr_for_each_host - call a function for each IEEE 1394 host
1764 * @data: an address to supply to the callback
1765 * @cb: function to call for each host
1766 *
1767 * Iterate the hosts, calling a given function with supplied data for each host.
1768 * If the callback fails on a host, i.e. if it returns a non-zero value, the
1769 * iteration is stopped.
1770 *
1771 * Return value: 0 on success, non-zero on failure (same as returned by last run
1772 * of the callback).
1773 */
1774int nodemgr_for_each_host(void *data, int (*cb)(struct hpsb_host *, void *))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001775{
Stefan Richter11305c32008-08-19 21:29:23 +02001776 struct per_host_parameter p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001777
Stefan Richter11305c32008-08-19 21:29:23 +02001778 p.cb = cb;
1779 p.data = data;
1780 return class_for_each_device(&hpsb_host_class, NULL, &p, per_host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001781}
1782
Stefan Richteref815332007-03-05 03:05:32 +01001783/* The following two convenience functions use a struct node_entry
Linus Torvalds1da177e2005-04-16 15:20:36 -07001784 * for addressing a node on the bus. They are intended for use by any
1785 * process context, not just the nodemgr thread, so we need to be a
1786 * little careful when reading out the node ID and generation. The
1787 * thing that can go wrong is that we get the node ID, then a bus
1788 * reset occurs, and then we read the generation. The node ID is
1789 * possibly invalid, but the generation is current, and we end up
1790 * sending a packet to a the wrong node.
1791 *
1792 * The solution is to make sure we read the generation first, so that
1793 * if a reset occurs in the process, we end up with a stale generation
1794 * and the transactions will fail instead of silently using wrong node
1795 * ID's.
1796 */
1797
Stefan Richterafd65462007-03-05 03:06:23 +01001798/**
1799 * hpsb_node_fill_packet - fill some destination information into a packet
1800 * @ne: destination node
1801 * @packet: packet to fill in
1802 *
1803 * This will fill in the given, pre-initialised hpsb_packet with the current
1804 * information from the node entry (host, node ID, bus generation number).
1805 */
1806void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *packet)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001807{
Stefan Richterafd65462007-03-05 03:06:23 +01001808 packet->host = ne->host;
1809 packet->generation = ne->generation;
Stefan Richter29f8ea82008-08-27 01:18:32 +02001810 smp_rmb();
Stefan Richterafd65462007-03-05 03:06:23 +01001811 packet->node_id = ne->nodeid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001812}
1813
1814int hpsb_node_write(struct node_entry *ne, u64 addr,
1815 quadlet_t *buffer, size_t length)
1816{
1817 unsigned int generation = ne->generation;
1818
Stefan Richter29f8ea82008-08-27 01:18:32 +02001819 smp_rmb();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001820 return hpsb_write(ne->host, ne->nodeid, generation,
1821 addr, buffer, length);
1822}
1823
1824static void nodemgr_add_host(struct hpsb_host *host)
1825{
1826 struct host_info *hi;
1827
1828 hi = hpsb_create_hostinfo(&nodemgr_highlevel, host, sizeof(*hi));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001829 if (!hi) {
Stefan Richterd2f119f2006-07-03 12:02:35 -04001830 HPSB_ERR("NodeMgr: out of memory in add host");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001831 return;
1832 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001833 hi->host = host;
Stefan Richter11305c32008-08-19 21:29:23 +02001834 hi->thread = kthread_run(nodemgr_host_thread, host, "knodemgrd_%d",
Stefan Richterd2f119f2006-07-03 12:02:35 -04001835 host->id);
1836 if (IS_ERR(hi->thread)) {
1837 HPSB_ERR("NodeMgr: cannot start thread for host %d", host->id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001838 hpsb_destroy_hostinfo(&nodemgr_highlevel, host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001839 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001840}
1841
1842static void nodemgr_host_reset(struct hpsb_host *host)
1843{
1844 struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1845
Stefan Richterd2f119f2006-07-03 12:02:35 -04001846 if (hi) {
1847 HPSB_VERBOSE("NodeMgr: Processing reset for host %d", host->id);
1848 wake_up_process(hi->thread);
1849 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001850}
1851
1852static void nodemgr_remove_host(struct hpsb_host *host)
1853{
1854 struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1855
1856 if (hi) {
Stefan Richterd2f119f2006-07-03 12:02:35 -04001857 kthread_stop(hi->thread);
1858 nodemgr_remove_host_dev(&host->device);
1859 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001860}
1861
1862static struct hpsb_highlevel nodemgr_highlevel = {
1863 .name = "Node manager",
1864 .add_host = nodemgr_add_host,
1865 .host_reset = nodemgr_host_reset,
1866 .remove_host = nodemgr_remove_host,
1867};
1868
1869int init_ieee1394_nodemgr(void)
1870{
Stefan Richter7fdfc902006-10-21 01:23:56 +02001871 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001872
Stefan Richter7fdfc902006-10-21 01:23:56 +02001873 error = class_register(&nodemgr_ne_class);
1874 if (error)
Stefan Richter91efa462007-02-06 02:34:45 +01001875 goto fail_ne;
Stefan Richter7fdfc902006-10-21 01:23:56 +02001876 error = class_register(&nodemgr_ud_class);
Stefan Richter91efa462007-02-06 02:34:45 +01001877 if (error)
1878 goto fail_ud;
Stefan Richter8252bbb2006-11-22 21:09:42 +01001879 error = driver_register(&nodemgr_mid_layer_driver);
Stefan Richter91efa462007-02-06 02:34:45 +01001880 if (error)
1881 goto fail_ml;
1882 /* This driver is not used if nodemgr is off (disable_nodemgr=1). */
1883 nodemgr_dev_template_host.driver = &nodemgr_mid_layer_driver;
1884
Linus Torvalds1da177e2005-04-16 15:20:36 -07001885 hpsb_register_highlevel(&nodemgr_highlevel);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001886 return 0;
Stefan Richter91efa462007-02-06 02:34:45 +01001887
1888fail_ml:
1889 class_unregister(&nodemgr_ud_class);
1890fail_ud:
1891 class_unregister(&nodemgr_ne_class);
1892fail_ne:
1893 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001894}
1895
1896void cleanup_ieee1394_nodemgr(void)
1897{
Stefan Richterd41bba22006-11-22 21:28:19 +01001898 hpsb_unregister_highlevel(&nodemgr_highlevel);
Stefan Richter91efa462007-02-06 02:34:45 +01001899 driver_unregister(&nodemgr_mid_layer_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001900 class_unregister(&nodemgr_ud_class);
1901 class_unregister(&nodemgr_ne_class);
1902}