blob: 29d833e71cbfbc3c8ef0be7137186cc07afa553e [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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070013#include <linux/list.h>
14#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070015#include <linux/delay.h>
Stefan Richterd2f119f2006-07-03 12:02:35 -040016#include <linux/kthread.h>
Stefan Richter8252bbb2006-11-22 21:09:42 +010017#include <linux/module.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include <linux/moduleparam.h>
Stefan Richter9543a932007-04-10 02:39:07 +020019#include <linux/mutex.h>
Nigel Cunningham7dfb7102006-12-06 20:34:23 -080020#include <linux/freezer.h>
Matthew Wilcox6188e102008-04-18 22:21:05 -040021#include <linux/semaphore.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include <asm/atomic.h>
23
Stefan Richterde4394f2006-07-03 12:02:29 -040024#include "csr.h"
25#include "highlevel.h"
26#include "hosts.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include "ieee1394.h"
28#include "ieee1394_core.h"
Stefan Richterde4394f2006-07-03 12:02:29 -040029#include "ieee1394_hotplug.h"
30#include "ieee1394_types.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include "ieee1394_transactions.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#include "nodemgr.h"
33
Ben Collins1934b8b2005-07-09 20:01:23 -040034static int ignore_drivers;
Stefan Richter3a632fe2006-07-03 12:02:35 -040035module_param(ignore_drivers, int, S_IRUGO | S_IWUSR);
Linus Torvalds1da177e2005-04-16 15:20:36 -070036MODULE_PARM_DESC(ignore_drivers, "Disable automatic probing for drivers.");
37
38struct nodemgr_csr_info {
39 struct hpsb_host *host;
40 nodeid_t nodeid;
41 unsigned int generation;
Ben Collins647dcb52006-06-12 18:12:37 -040042 unsigned int speed_unverified:1;
Linus Torvalds1da177e2005-04-16 15:20:36 -070043};
44
45
Ben Collins647dcb52006-06-12 18:12:37 -040046/*
47 * Correct the speed map entry. This is necessary
48 * - for nodes with link speed < phy speed,
49 * - for 1394b nodes with negotiated phy port speed < IEEE1394_SPEED_MAX.
50 * A possible speed is determined by trial and error, using quadlet reads.
51 */
52static int nodemgr_check_speed(struct nodemgr_csr_info *ci, u64 addr,
53 quadlet_t *buffer)
54{
55 quadlet_t q;
56 u8 i, *speed, old_speed, good_speed;
Stefan Richter7fdfc902006-10-21 01:23:56 +020057 int error;
Ben Collins647dcb52006-06-12 18:12:37 -040058
Stefan Richterd7530a12006-07-03 00:58:01 +020059 speed = &(ci->host->speed[NODEID_TO_NODE(ci->nodeid)]);
Ben Collins647dcb52006-06-12 18:12:37 -040060 old_speed = *speed;
61 good_speed = IEEE1394_SPEED_MAX + 1;
62
63 /* Try every speed from S100 to old_speed.
64 * If we did it the other way around, a too low speed could be caught
65 * if the retry succeeded for some other reason, e.g. because the link
66 * just finished its initialization. */
67 for (i = IEEE1394_SPEED_100; i <= old_speed; i++) {
68 *speed = i;
Stefan Richter7fdfc902006-10-21 01:23:56 +020069 error = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
70 &q, sizeof(quadlet_t));
71 if (error)
Ben Collins647dcb52006-06-12 18:12:37 -040072 break;
73 *buffer = q;
74 good_speed = i;
75 }
76 if (good_speed <= IEEE1394_SPEED_MAX) {
77 HPSB_DEBUG("Speed probe of node " NODE_BUS_FMT " yields %s",
78 NODE_BUS_ARGS(ci->host, ci->nodeid),
79 hpsb_speedto_str[good_speed]);
80 *speed = good_speed;
81 ci->speed_unverified = 0;
82 return 0;
83 }
84 *speed = old_speed;
Stefan Richter7fdfc902006-10-21 01:23:56 +020085 return error;
Ben Collins647dcb52006-06-12 18:12:37 -040086}
Linus Torvalds1da177e2005-04-16 15:20:36 -070087
88static int nodemgr_bus_read(struct csr1212_csr *csr, u64 addr, u16 length,
Stefan Richterd41bba22006-11-22 21:28:19 +010089 void *buffer, void *__ci)
Linus Torvalds1da177e2005-04-16 15:20:36 -070090{
91 struct nodemgr_csr_info *ci = (struct nodemgr_csr_info*)__ci;
Stefan Richter7fdfc902006-10-21 01:23:56 +020092 int i, error;
Linus Torvalds1da177e2005-04-16 15:20:36 -070093
Jody McIntyree31a1272005-09-30 11:59:09 -070094 for (i = 1; ; i++) {
Stefan Richter7fdfc902006-10-21 01:23:56 +020095 error = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
96 buffer, length);
97 if (!error) {
Ben Collins647dcb52006-06-12 18:12:37 -040098 ci->speed_unverified = 0;
99 break;
100 }
101 /* Give up after 3rd failure. */
102 if (i == 3)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 break;
104
Ben Collins647dcb52006-06-12 18:12:37 -0400105 /* The ieee1394_core guessed the node's speed capability from
106 * the self ID. Check whether a lower speed works. */
107 if (ci->speed_unverified && length == sizeof(quadlet_t)) {
Stefan Richter7fdfc902006-10-21 01:23:56 +0200108 error = nodemgr_check_speed(ci, addr, buffer);
109 if (!error)
Ben Collins647dcb52006-06-12 18:12:37 -0400110 break;
111 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112 if (msleep_interruptible(334))
113 return -EINTR;
114 }
Stefan Richter7fdfc902006-10-21 01:23:56 +0200115 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116}
117
118static int nodemgr_get_max_rom(quadlet_t *bus_info_data, void *__ci)
119{
Stefan Richter7fb9add2007-03-11 22:49:05 +0100120 return (be32_to_cpu(bus_info_data[2]) >> 8) & 0x3;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121}
122
123static struct csr1212_bus_ops nodemgr_csr_ops = {
124 .bus_read = nodemgr_bus_read,
125 .get_max_rom = nodemgr_get_max_rom
126};
127
128
129/*
130 * Basically what we do here is start off retrieving the bus_info block.
131 * From there will fill in some info about the node, verify it is of IEEE
132 * 1394 type, and that the crc checks out ok. After that we start off with
133 * the root directory, and subdirectories. To do this, we retrieve the
134 * quadlet header for a directory, find out the length, and retrieve the
135 * complete directory entry (be it a leaf or a directory). We then process
136 * it and add the info to our structure for that particular node.
137 *
138 * We verify CRC's along the way for each directory/block/leaf. The entire
139 * node structure is generic, and simply stores the information in a way
140 * that's easy to parse by the protocol interface.
141 */
142
143/*
144 * The nodemgr relies heavily on the Driver Model for device callbacks and
145 * driver/device mappings. The old nodemgr used to handle all this itself,
146 * but now we are much simpler because of the LDM.
147 */
148
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149struct host_info {
150 struct hpsb_host *host;
151 struct list_head list;
Stefan Richterd2f119f2006-07-03 12:02:35 -0400152 struct task_struct *thread;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153};
154
155static int nodemgr_bus_match(struct device * dev, struct device_driver * drv);
Kay Sievers7eff2e72007-08-14 15:15:12 +0200156static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157static void nodemgr_resume_ne(struct node_entry *ne);
158static void nodemgr_remove_ne(struct node_entry *ne);
159static struct node_entry *find_entry_by_guid(u64 guid);
160
161struct bus_type ieee1394_bus_type = {
162 .name = "ieee1394",
163 .match = nodemgr_bus_match,
164};
165
Kay Sieversdd7f2922007-05-25 11:50:53 +0200166static void host_cls_release(struct device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167{
Kay Sieversdd7f2922007-05-25 11:50:53 +0200168 put_device(&container_of((dev), struct hpsb_host, host_dev)->device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169}
170
171struct class hpsb_host_class = {
172 .name = "ieee1394_host",
Kay Sieversdd7f2922007-05-25 11:50:53 +0200173 .dev_release = host_cls_release,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174};
175
Kay Sieversdd7f2922007-05-25 11:50:53 +0200176static void ne_cls_release(struct device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177{
Kay Sieversdd7f2922007-05-25 11:50:53 +0200178 put_device(&container_of((dev), struct node_entry, node_dev)->device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179}
180
181static struct class nodemgr_ne_class = {
182 .name = "ieee1394_node",
Kay Sieversdd7f2922007-05-25 11:50:53 +0200183 .dev_release = ne_cls_release,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184};
185
Kay Sieversdd7f2922007-05-25 11:50:53 +0200186static void ud_cls_release(struct device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187{
Kay Sieversdd7f2922007-05-25 11:50:53 +0200188 put_device(&container_of((dev), struct unit_directory, unit_dev)->device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189}
190
191/* The name here is only so that unit directory hotplug works with old
Kay Sieversdd7f2922007-05-25 11:50:53 +0200192 * style hotplug, which only ever did unit directories anyway.
193 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194static struct class nodemgr_ud_class = {
195 .name = "ieee1394",
Kay Sieversdd7f2922007-05-25 11:50:53 +0200196 .dev_release = ud_cls_release,
197 .dev_uevent = nodemgr_uevent,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198};
199
200static struct hpsb_highlevel nodemgr_highlevel;
201
202
203static void nodemgr_release_ud(struct device *dev)
204{
205 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
206
207 if (ud->vendor_name_kv)
208 csr1212_release_keyval(ud->vendor_name_kv);
209 if (ud->model_name_kv)
210 csr1212_release_keyval(ud->model_name_kv);
211
212 kfree(ud);
213}
214
215static void nodemgr_release_ne(struct device *dev)
216{
217 struct node_entry *ne = container_of(dev, struct node_entry, device);
218
219 if (ne->vendor_name_kv)
220 csr1212_release_keyval(ne->vendor_name_kv);
221
222 kfree(ne);
223}
224
225
226static void nodemgr_release_host(struct device *dev)
227{
228 struct hpsb_host *host = container_of(dev, struct hpsb_host, device);
229
230 csr1212_destroy_csr(host->csr.rom);
231
232 kfree(host);
233}
234
235static int nodemgr_ud_platform_data;
236
237static struct device nodemgr_dev_template_ud = {
238 .bus = &ieee1394_bus_type,
239 .release = nodemgr_release_ud,
240 .platform_data = &nodemgr_ud_platform_data,
241};
242
243static struct device nodemgr_dev_template_ne = {
244 .bus = &ieee1394_bus_type,
245 .release = nodemgr_release_ne,
246};
247
Stefan Richter8252bbb2006-11-22 21:09:42 +0100248/* This dummy driver prevents the host devices from being scanned. We have no
249 * useful drivers for them yet, and there would be a deadlock possible if the
250 * driver core scans the host device while the host's low-level driver (i.e.
251 * the host's parent device) is being removed. */
252static struct device_driver nodemgr_mid_layer_driver = {
253 .bus = &ieee1394_bus_type,
254 .name = "nodemgr",
255 .owner = THIS_MODULE,
256};
257
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258struct device nodemgr_dev_template_host = {
259 .bus = &ieee1394_bus_type,
260 .release = nodemgr_release_host,
261};
262
263
264#define fw_attr(class, class_type, field, type, format_string) \
Yani Ioannoue404e272005-05-17 06:42:58 -0400265static ssize_t fw_show_##class##_##field (struct device *dev, struct device_attribute *attr, char *buf)\
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266{ \
267 class_type *class; \
268 class = container_of(dev, class_type, device); \
269 return sprintf(buf, format_string, (type)class->field); \
270} \
271static struct device_attribute dev_attr_##class##_##field = { \
272 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
273 .show = fw_show_##class##_##field, \
274};
275
276#define fw_attr_td(class, class_type, td_kv) \
Yani Ioannoue404e272005-05-17 06:42:58 -0400277static ssize_t fw_show_##class##_##td_kv (struct device *dev, struct device_attribute *attr, char *buf)\
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278{ \
279 int len; \
280 class_type *class = container_of(dev, class_type, device); \
281 len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t); \
282 memcpy(buf, \
283 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv), \
284 len); \
Al Viro51ec1382007-07-15 20:59:51 +0100285 while (buf[len - 1] == '\0') \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 len--; \
287 buf[len++] = '\n'; \
288 buf[len] = '\0'; \
289 return len; \
290} \
291static struct device_attribute dev_attr_##class##_##td_kv = { \
292 .attr = {.name = __stringify(td_kv), .mode = S_IRUGO }, \
293 .show = fw_show_##class##_##td_kv, \
294};
295
296
297#define fw_drv_attr(field, type, format_string) \
298static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \
299{ \
300 struct hpsb_protocol_driver *driver; \
301 driver = container_of(drv, struct hpsb_protocol_driver, driver); \
302 return sprintf(buf, format_string, (type)driver->field);\
303} \
304static struct driver_attribute driver_attr_drv_##field = { \
Stefan Richterd41bba22006-11-22 21:28:19 +0100305 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
306 .show = fw_drv_show_##field, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307};
308
309
Yani Ioannoue404e272005-05-17 06:42:58 -0400310static ssize_t fw_show_ne_bus_options(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311{
312 struct node_entry *ne = container_of(dev, struct node_entry, device);
313
314 return sprintf(buf, "IRMC(%d) CMC(%d) ISC(%d) BMC(%d) PMC(%d) GEN(%d) "
315 "LSPD(%d) MAX_REC(%d) MAX_ROM(%d) CYC_CLK_ACC(%d)\n",
316 ne->busopt.irmc,
317 ne->busopt.cmc, ne->busopt.isc, ne->busopt.bmc,
318 ne->busopt.pmc, ne->busopt.generation, ne->busopt.lnkspd,
319 ne->busopt.max_rec,
320 ne->busopt.max_rom,
321 ne->busopt.cyc_clk_acc);
322}
323static DEVICE_ATTR(bus_options,S_IRUGO,fw_show_ne_bus_options,NULL);
324
325
Stefan Richter99519032006-07-02 14:17:00 +0200326#ifdef HPSB_DEBUG_TLABELS
327static ssize_t fw_show_ne_tlabels_free(struct device *dev,
328 struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329{
330 struct node_entry *ne = container_of(dev, struct node_entry, device);
Stefan Richter99519032006-07-02 14:17:00 +0200331 unsigned long flags;
332 unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map;
333 int tf;
334
335 spin_lock_irqsave(&hpsb_tlabel_lock, flags);
336 tf = 64 - bitmap_weight(tp, 64);
337 spin_unlock_irqrestore(&hpsb_tlabel_lock, flags);
338
339 return sprintf(buf, "%d\n", tf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340}
341static DEVICE_ATTR(tlabels_free,S_IRUGO,fw_show_ne_tlabels_free,NULL);
342
343
Stefan Richter99519032006-07-02 14:17:00 +0200344static ssize_t fw_show_ne_tlabels_mask(struct device *dev,
345 struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346{
347 struct node_entry *ne = container_of(dev, struct node_entry, device);
Stefan Richter99519032006-07-02 14:17:00 +0200348 unsigned long flags;
349 unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map;
350 u64 tm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351
Stefan Richter99519032006-07-02 14:17:00 +0200352 spin_lock_irqsave(&hpsb_tlabel_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353#if (BITS_PER_LONG <= 32)
Stefan Richter99519032006-07-02 14:17:00 +0200354 tm = ((u64)tp[0] << 32) + tp[1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355#else
Stefan Richter99519032006-07-02 14:17:00 +0200356 tm = tp[0];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357#endif
Stefan Richter99519032006-07-02 14:17:00 +0200358 spin_unlock_irqrestore(&hpsb_tlabel_lock, flags);
359
Randy Dunlap7f588032006-10-23 21:44:36 -0700360 return sprintf(buf, "0x%016llx\n", (unsigned long long)tm);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361}
362static DEVICE_ATTR(tlabels_mask, S_IRUGO, fw_show_ne_tlabels_mask, NULL);
Stefan Richter99519032006-07-02 14:17:00 +0200363#endif /* HPSB_DEBUG_TLABELS */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364
365
Yani Ioannoue404e272005-05-17 06:42:58 -0400366static 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 -0700367{
368 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
369 int state = simple_strtoul(buf, NULL, 10);
370
371 if (state == 1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372 ud->ignore_driver = 1;
Stefan Richterb07375b2006-10-22 16:16:27 +0200373 device_release_driver(dev);
Stefan Richterb07375b2006-10-22 16:16:27 +0200374 } else if (state == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375 ud->ignore_driver = 0;
376
377 return count;
378}
Yani Ioannoue404e272005-05-17 06:42:58 -0400379static ssize_t fw_get_ignore_driver(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380{
381 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
382
383 return sprintf(buf, "%d\n", ud->ignore_driver);
384}
385static DEVICE_ATTR(ignore_driver, S_IWUSR | S_IRUGO, fw_get_ignore_driver, fw_set_ignore_driver);
386
387
388static ssize_t fw_set_destroy_node(struct bus_type *bus, const char *buf, size_t count)
389{
390 struct node_entry *ne;
391 u64 guid = (u64)simple_strtoull(buf, NULL, 16);
392
393 ne = find_entry_by_guid(guid);
394
395 if (ne == NULL || !ne->in_limbo)
396 return -EINVAL;
397
398 nodemgr_remove_ne(ne);
399
400 return count;
401}
402static ssize_t fw_get_destroy_node(struct bus_type *bus, char *buf)
403{
404 return sprintf(buf, "You can destroy in_limbo nodes by writing their GUID to this file\n");
405}
406static BUS_ATTR(destroy_node, S_IWUSR | S_IRUGO, fw_get_destroy_node, fw_set_destroy_node);
407
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200409static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf,
410 size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411{
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200412 int error = 0;
413
Stefan Richter40fd89c2006-07-03 12:02:34 -0400414 if (simple_strtoul(buf, NULL, 10) == 1)
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200415 error = bus_rescan_devices(&ieee1394_bus_type);
416 return error ? error : count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417}
418static ssize_t fw_get_rescan(struct bus_type *bus, char *buf)
419{
420 return sprintf(buf, "You can force a rescan of the bus for "
421 "drivers by writing a 1 to this file\n");
422}
423static BUS_ATTR(rescan, S_IWUSR | S_IRUGO, fw_get_rescan, fw_set_rescan);
424
425
426static ssize_t fw_set_ignore_drivers(struct bus_type *bus, const char *buf, size_t count)
427{
428 int state = simple_strtoul(buf, NULL, 10);
429
430 if (state == 1)
431 ignore_drivers = 1;
Stefan Richterb07375b2006-10-22 16:16:27 +0200432 else if (state == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433 ignore_drivers = 0;
434
435 return count;
436}
437static ssize_t fw_get_ignore_drivers(struct bus_type *bus, char *buf)
438{
439 return sprintf(buf, "%d\n", ignore_drivers);
440}
441static BUS_ATTR(ignore_drivers, S_IWUSR | S_IRUGO, fw_get_ignore_drivers, fw_set_ignore_drivers);
442
443
444struct bus_attribute *const fw_bus_attrs[] = {
445 &bus_attr_destroy_node,
446 &bus_attr_rescan,
447 &bus_attr_ignore_drivers,
448 NULL
449};
450
451
452fw_attr(ne, struct node_entry, capabilities, unsigned int, "0x%06x\n")
453fw_attr(ne, struct node_entry, nodeid, unsigned int, "0x%04x\n")
454
455fw_attr(ne, struct node_entry, vendor_id, unsigned int, "0x%06x\n")
456fw_attr_td(ne, struct node_entry, vendor_name_kv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457
458fw_attr(ne, struct node_entry, guid, unsigned long long, "0x%016Lx\n")
459fw_attr(ne, struct node_entry, guid_vendor_id, unsigned int, "0x%06x\n")
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460fw_attr(ne, struct node_entry, in_limbo, int, "%d\n");
461
462static struct device_attribute *const fw_ne_attrs[] = {
463 &dev_attr_ne_guid,
464 &dev_attr_ne_guid_vendor_id,
465 &dev_attr_ne_capabilities,
466 &dev_attr_ne_vendor_id,
467 &dev_attr_ne_nodeid,
468 &dev_attr_bus_options,
Stefan Richter99519032006-07-02 14:17:00 +0200469#ifdef HPSB_DEBUG_TLABELS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 &dev_attr_tlabels_free,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 &dev_attr_tlabels_mask,
Stefan Richter99519032006-07-02 14:17:00 +0200472#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473};
474
475
476
477fw_attr(ud, struct unit_directory, address, unsigned long long, "0x%016Lx\n")
478fw_attr(ud, struct unit_directory, length, int, "%d\n")
479/* These are all dependent on the value being provided */
480fw_attr(ud, struct unit_directory, vendor_id, unsigned int, "0x%06x\n")
481fw_attr(ud, struct unit_directory, model_id, unsigned int, "0x%06x\n")
482fw_attr(ud, struct unit_directory, specifier_id, unsigned int, "0x%06x\n")
483fw_attr(ud, struct unit_directory, version, unsigned int, "0x%06x\n")
484fw_attr_td(ud, struct unit_directory, vendor_name_kv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485fw_attr_td(ud, struct unit_directory, model_name_kv)
486
487static struct device_attribute *const fw_ud_attrs[] = {
488 &dev_attr_ud_address,
489 &dev_attr_ud_length,
490 &dev_attr_ignore_driver,
491};
492
493
494fw_attr(host, struct hpsb_host, node_count, int, "%d\n")
495fw_attr(host, struct hpsb_host, selfid_count, int, "%d\n")
496fw_attr(host, struct hpsb_host, nodes_active, int, "%d\n")
497fw_attr(host, struct hpsb_host, in_bus_reset, int, "%d\n")
498fw_attr(host, struct hpsb_host, is_root, int, "%d\n")
499fw_attr(host, struct hpsb_host, is_cycmst, int, "%d\n")
500fw_attr(host, struct hpsb_host, is_irm, int, "%d\n")
501fw_attr(host, struct hpsb_host, is_busmgr, int, "%d\n")
502
503static struct device_attribute *const fw_host_attrs[] = {
504 &dev_attr_host_node_count,
505 &dev_attr_host_selfid_count,
506 &dev_attr_host_nodes_active,
507 &dev_attr_host_in_bus_reset,
508 &dev_attr_host_is_root,
509 &dev_attr_host_is_cycmst,
510 &dev_attr_host_is_irm,
511 &dev_attr_host_is_busmgr,
512};
513
514
515static ssize_t fw_show_drv_device_ids(struct device_driver *drv, char *buf)
516{
517 struct hpsb_protocol_driver *driver;
518 struct ieee1394_device_id *id;
519 int length = 0;
520 char *scratch = buf;
521
Stefan Richterd41bba22006-11-22 21:28:19 +0100522 driver = container_of(drv, struct hpsb_protocol_driver, driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523
524 for (id = driver->id_table; id->match_flags != 0; id++) {
525 int need_coma = 0;
526
527 if (id->match_flags & IEEE1394_MATCH_VENDOR_ID) {
528 length += sprintf(scratch, "vendor_id=0x%06x", id->vendor_id);
529 scratch = buf + length;
530 need_coma++;
531 }
532
533 if (id->match_flags & IEEE1394_MATCH_MODEL_ID) {
534 length += sprintf(scratch, "%smodel_id=0x%06x",
535 need_coma++ ? "," : "",
536 id->model_id);
537 scratch = buf + length;
538 }
539
540 if (id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) {
541 length += sprintf(scratch, "%sspecifier_id=0x%06x",
542 need_coma++ ? "," : "",
543 id->specifier_id);
544 scratch = buf + length;
545 }
546
547 if (id->match_flags & IEEE1394_MATCH_VERSION) {
548 length += sprintf(scratch, "%sversion=0x%06x",
549 need_coma++ ? "," : "",
550 id->version);
551 scratch = buf + length;
552 }
553
554 if (need_coma) {
555 *scratch++ = '\n';
556 length++;
557 }
558 }
559
560 return length;
561}
562static DRIVER_ATTR(device_ids,S_IRUGO,fw_show_drv_device_ids,NULL);
563
564
565fw_drv_attr(name, const char *, "%s\n")
566
567static struct driver_attribute *const fw_drv_attrs[] = {
568 &driver_attr_drv_name,
569 &driver_attr_device_ids,
570};
571
572
573static void nodemgr_create_drv_files(struct hpsb_protocol_driver *driver)
574{
575 struct device_driver *drv = &driver->driver;
576 int i;
577
578 for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200579 if (driver_create_file(drv, fw_drv_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_remove_drv_files(struct hpsb_protocol_driver *driver)
588{
589 struct device_driver *drv = &driver->driver;
590 int i;
591
592 for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
593 driver_remove_file(drv, fw_drv_attrs[i]);
594}
595
596
597static void nodemgr_create_ne_dev_files(struct node_entry *ne)
598{
599 struct device *dev = &ne->device;
600 int i;
601
602 for (i = 0; i < ARRAY_SIZE(fw_ne_attrs); i++)
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200603 if (device_create_file(dev, fw_ne_attrs[i]))
604 goto fail;
605 return;
606fail:
Stefan Richter9be51c52007-03-30 19:21:05 +0200607 HPSB_ERR("Failed to add sysfs attribute");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608}
609
610
611static void nodemgr_create_host_dev_files(struct hpsb_host *host)
612{
613 struct device *dev = &host->device;
614 int i;
615
616 for (i = 0; i < ARRAY_SIZE(fw_host_attrs); i++)
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200617 if (device_create_file(dev, fw_host_attrs[i]))
618 goto fail;
619 return;
620fail:
Stefan Richter9be51c52007-03-30 19:21:05 +0200621 HPSB_ERR("Failed to add sysfs attribute");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622}
623
624
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200625static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host,
626 nodeid_t nodeid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627
628static void nodemgr_update_host_dev_links(struct hpsb_host *host)
629{
630 struct device *dev = &host->device;
631 struct node_entry *ne;
632
633 sysfs_remove_link(&dev->kobj, "irm_id");
634 sysfs_remove_link(&dev->kobj, "busmgr_id");
635 sysfs_remove_link(&dev->kobj, "host_id");
636
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200637 if ((ne = find_entry_by_nodeid(host, host->irm_id)) &&
638 sysfs_create_link(&dev->kobj, &ne->device.kobj, "irm_id"))
639 goto fail;
640 if ((ne = find_entry_by_nodeid(host, host->busmgr_id)) &&
641 sysfs_create_link(&dev->kobj, &ne->device.kobj, "busmgr_id"))
642 goto fail;
643 if ((ne = find_entry_by_nodeid(host, host->node_id)) &&
644 sysfs_create_link(&dev->kobj, &ne->device.kobj, "host_id"))
645 goto fail;
646 return;
647fail:
648 HPSB_ERR("Failed to update sysfs attributes for host %d", host->id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649}
650
651static void nodemgr_create_ud_dev_files(struct unit_directory *ud)
652{
653 struct device *dev = &ud->device;
654 int i;
655
656 for (i = 0; i < ARRAY_SIZE(fw_ud_attrs); i++)
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200657 if (device_create_file(dev, fw_ud_attrs[i]))
658 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659 if (ud->flags & UNIT_DIRECTORY_SPECIFIER_ID)
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200660 if (device_create_file(dev, &dev_attr_ud_specifier_id))
661 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662 if (ud->flags & UNIT_DIRECTORY_VERSION)
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200663 if (device_create_file(dev, &dev_attr_ud_version))
664 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665 if (ud->flags & UNIT_DIRECTORY_VENDOR_ID) {
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200666 if (device_create_file(dev, &dev_attr_ud_vendor_id))
667 goto fail;
668 if (ud->vendor_name_kv &&
669 device_create_file(dev, &dev_attr_ud_vendor_name_kv))
670 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672 if (ud->flags & UNIT_DIRECTORY_MODEL_ID) {
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200673 if (device_create_file(dev, &dev_attr_ud_model_id))
674 goto fail;
675 if (ud->model_name_kv &&
676 device_create_file(dev, &dev_attr_ud_model_name_kv))
677 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678 }
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200679 return;
680fail:
Stefan Richter9be51c52007-03-30 19:21:05 +0200681 HPSB_ERR("Failed to add sysfs attribute");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682}
683
684
685static int nodemgr_bus_match(struct device * dev, struct device_driver * drv)
686{
Stefan Richterd41bba22006-11-22 21:28:19 +0100687 struct hpsb_protocol_driver *driver;
688 struct unit_directory *ud;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689 struct ieee1394_device_id *id;
690
691 /* We only match unit directories */
692 if (dev->platform_data != &nodemgr_ud_platform_data)
693 return 0;
694
695 ud = container_of(dev, struct unit_directory, device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696 if (ud->ne->in_limbo || ud->ignore_driver)
697 return 0;
698
Stefan Richter8252bbb2006-11-22 21:09:42 +0100699 /* We only match drivers of type hpsb_protocol_driver */
700 if (drv == &nodemgr_mid_layer_driver)
701 return 0;
702
703 driver = container_of(drv, struct hpsb_protocol_driver, driver);
Stefan Richterd2ace292008-02-18 21:11:07 +0100704 id = driver->id_table;
705 if (!id)
706 return 0;
707
708 for (; id->match_flags != 0; id++) {
Stefan Richterd41bba22006-11-22 21:28:19 +0100709 if ((id->match_flags & IEEE1394_MATCH_VENDOR_ID) &&
710 id->vendor_id != ud->vendor_id)
711 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712
Stefan Richterd41bba22006-11-22 21:28:19 +0100713 if ((id->match_flags & IEEE1394_MATCH_MODEL_ID) &&
714 id->model_id != ud->model_id)
715 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716
Stefan Richterd41bba22006-11-22 21:28:19 +0100717 if ((id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) &&
718 id->specifier_id != ud->specifier_id)
719 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720
Stefan Richterd41bba22006-11-22 21:28:19 +0100721 if ((id->match_flags & IEEE1394_MATCH_VERSION) &&
722 id->version != ud->version)
723 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724
725 return 1;
Stefan Richterd41bba22006-11-22 21:28:19 +0100726 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727
728 return 0;
729}
730
731
Stefan Richterb07375b2006-10-22 16:16:27 +0200732static DEFINE_MUTEX(nodemgr_serialize_remove_uds);
733
Dave Young73cf6022008-01-22 13:56:32 +0800734static int __match_ne(struct device *dev, void *data)
735{
736 struct unit_directory *ud;
737 struct node_entry *ne = (struct node_entry *)data;
738
739 ud = container_of(dev, struct unit_directory, unit_dev);
740 return ud->ne == ne;
741}
742
Linus Torvalds1da177e2005-04-16 15:20:36 -0700743static void nodemgr_remove_uds(struct node_entry *ne)
744{
Kay Sieversdd7f2922007-05-25 11:50:53 +0200745 struct device *dev;
Dave Young73cf6022008-01-22 13:56:32 +0800746 struct unit_directory *ud;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700747
Dave Young73cf6022008-01-22 13:56:32 +0800748 /* Use class_find device to iterate the devices. Since this code
749 * may be called from other contexts besides the knodemgrds,
750 * protect it by nodemgr_serialize_remove_uds.
Stefan Richterb07375b2006-10-22 16:16:27 +0200751 */
Stefan Richterb07375b2006-10-22 16:16:27 +0200752 mutex_lock(&nodemgr_serialize_remove_uds);
Stefan Richter1e4f7bc2006-12-02 22:23:34 +0100753 for (;;) {
Dave Young73cf6022008-01-22 13:56:32 +0800754 dev = class_find_device(&nodemgr_ud_class, ne, __match_ne);
755 if (!dev)
Stefan Richter1e4f7bc2006-12-02 22:23:34 +0100756 break;
Dave Young73cf6022008-01-22 13:56:32 +0800757 ud = container_of(dev, struct unit_directory, unit_dev);
758 put_device(dev);
Kay Sieversdd7f2922007-05-25 11:50:53 +0200759 device_unregister(&ud->unit_dev);
Stefan Richter1e4f7bc2006-12-02 22:23:34 +0100760 device_unregister(&ud->device);
Stefan Richterb07375b2006-10-22 16:16:27 +0200761 }
Stefan Richterb07375b2006-10-22 16:16:27 +0200762 mutex_unlock(&nodemgr_serialize_remove_uds);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763}
764
765
766static void nodemgr_remove_ne(struct node_entry *ne)
767{
Stefan Richtercec1a312006-11-18 23:16:11 +0100768 struct device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769
770 dev = get_device(&ne->device);
771 if (!dev)
772 return;
773
774 HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
775 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776 nodemgr_remove_uds(ne);
777
Kay Sieversdd7f2922007-05-25 11:50:53 +0200778 device_unregister(&ne->node_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779 device_unregister(dev);
780
781 put_device(dev);
782}
783
gregkh@suse.de64360322005-03-25 11:45:31 -0800784static int __nodemgr_remove_host_dev(struct device *dev, void *data)
785{
Kay Sieversdd7f2922007-05-25 11:50:53 +0200786 if (dev->bus == &ieee1394_bus_type)
787 nodemgr_remove_ne(container_of(dev, struct node_entry,
788 device));
gregkh@suse.de64360322005-03-25 11:45:31 -0800789 return 0;
790}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700791
792static void nodemgr_remove_host_dev(struct device *dev)
793{
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200794 WARN_ON(device_for_each_child(dev, NULL, __nodemgr_remove_host_dev));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795 sysfs_remove_link(&dev->kobj, "irm_id");
796 sysfs_remove_link(&dev->kobj, "busmgr_id");
797 sysfs_remove_link(&dev->kobj, "host_id");
798}
799
800
801static void nodemgr_update_bus_options(struct node_entry *ne)
802{
803#ifdef CONFIG_IEEE1394_VERBOSEDEBUG
804 static const u16 mr[] = { 4, 64, 1024, 0};
805#endif
806 quadlet_t busoptions = be32_to_cpu(ne->csr->bus_info_data[2]);
807
Stefan Richterd41bba22006-11-22 21:28:19 +0100808 ne->busopt.irmc = (busoptions >> 31) & 1;
809 ne->busopt.cmc = (busoptions >> 30) & 1;
810 ne->busopt.isc = (busoptions >> 29) & 1;
811 ne->busopt.bmc = (busoptions >> 28) & 1;
812 ne->busopt.pmc = (busoptions >> 27) & 1;
813 ne->busopt.cyc_clk_acc = (busoptions >> 16) & 0xff;
814 ne->busopt.max_rec = 1 << (((busoptions >> 12) & 0xf) + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815 ne->busopt.max_rom = (busoptions >> 8) & 0x3;
Stefan Richterd41bba22006-11-22 21:28:19 +0100816 ne->busopt.generation = (busoptions >> 4) & 0xf;
817 ne->busopt.lnkspd = busoptions & 0x7;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818
819 HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d "
820 "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d",
821 busoptions, ne->busopt.irmc, ne->busopt.cmc,
822 ne->busopt.isc, ne->busopt.bmc, ne->busopt.pmc,
823 ne->busopt.cyc_clk_acc, ne->busopt.max_rec,
824 mr[ne->busopt.max_rom],
825 ne->busopt.generation, ne->busopt.lnkspd);
826}
827
828
829static struct node_entry *nodemgr_create_node(octlet_t guid, struct csr1212_csr *csr,
830 struct host_info *hi, nodeid_t nodeid,
831 unsigned int generation)
832{
833 struct hpsb_host *host = hi->host;
Stefan Richter85511582005-11-07 06:31:45 -0500834 struct node_entry *ne;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835
Stefan Richter85511582005-11-07 06:31:45 -0500836 ne = kzalloc(sizeof(*ne), GFP_KERNEL);
837 if (!ne)
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200838 goto fail_alloc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839
Stefan Richter85511582005-11-07 06:31:45 -0500840 ne->host = host;
841 ne->nodeid = nodeid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842 ne->generation = generation;
843 ne->needs_probe = 1;
844
Stefan Richter85511582005-11-07 06:31:45 -0500845 ne->guid = guid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846 ne->guid_vendor_id = (guid >> 40) & 0xffffff;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847 ne->csr = csr;
848
849 memcpy(&ne->device, &nodemgr_dev_template_ne,
850 sizeof(ne->device));
851 ne->device.parent = &host->device;
852 snprintf(ne->device.bus_id, BUS_ID_SIZE, "%016Lx",
853 (unsigned long long)(ne->guid));
854
Kay Sieversdd7f2922007-05-25 11:50:53 +0200855 ne->node_dev.parent = &ne->device;
856 ne->node_dev.class = &nodemgr_ne_class;
857 snprintf(ne->node_dev.bus_id, BUS_ID_SIZE, "%016Lx",
858 (unsigned long long)(ne->guid));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200860 if (device_register(&ne->device))
861 goto fail_devreg;
Kay Sieversdd7f2922007-05-25 11:50:53 +0200862 if (device_register(&ne->node_dev))
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200863 goto fail_classdevreg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864 get_device(&ne->device);
865
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866 nodemgr_create_ne_dev_files(ne);
867
868 nodemgr_update_bus_options(ne);
869
870 HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
871 (host->node_id == nodeid) ? "Host" : "Node",
872 NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
873
Stefan Richter85511582005-11-07 06:31:45 -0500874 return ne;
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200875
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200876fail_classdevreg:
877 device_unregister(&ne->device);
878fail_devreg:
879 kfree(ne);
880fail_alloc:
881 HPSB_ERR("Failed to create node ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
882 NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
883
884 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700885}
886
Dave Young73cf6022008-01-22 13:56:32 +0800887static int __match_ne_guid(struct device *dev, void *data)
888{
889 struct node_entry *ne;
890 u64 *guid = (u64 *)data;
891
892 ne = container_of(dev, struct node_entry, node_dev);
893 return ne->guid == *guid;
894}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895
896static struct node_entry *find_entry_by_guid(u64 guid)
897{
Kay Sieversdd7f2922007-05-25 11:50:53 +0200898 struct device *dev;
Dave Young73cf6022008-01-22 13:56:32 +0800899 struct node_entry *ne;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700900
Dave Young73cf6022008-01-22 13:56:32 +0800901 dev = class_find_device(&nodemgr_ne_class, &guid, __match_ne_guid);
902 if (!dev)
903 return NULL;
904 ne = container_of(dev, struct node_entry, node_dev);
905 put_device(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906
Dave Young73cf6022008-01-22 13:56:32 +0800907 return ne;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908}
909
Dave Young73cf6022008-01-22 13:56:32 +0800910struct match_nodeid_param {
911 struct hpsb_host *host;
912 nodeid_t nodeid;
913};
914
915static int __match_ne_nodeid(struct device *dev, void *data)
916{
917 int found = 0;
918 struct node_entry *ne;
919 struct match_nodeid_param *param = (struct match_nodeid_param *)data;
920
921 if (!dev)
922 goto ret;
923 ne = container_of(dev, struct node_entry, node_dev);
924 if (ne->host == param->host && ne->nodeid == param->nodeid)
925 found = 1;
926ret:
927 return found;
928}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929
Stefan Richterb07375b2006-10-22 16:16:27 +0200930static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host,
931 nodeid_t nodeid)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700932{
Kay Sieversdd7f2922007-05-25 11:50:53 +0200933 struct device *dev;
Dave Young73cf6022008-01-22 13:56:32 +0800934 struct node_entry *ne;
935 struct match_nodeid_param param;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936
Dave Young73cf6022008-01-22 13:56:32 +0800937 param.host = host;
938 param.nodeid = nodeid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939
Dave Young73cf6022008-01-22 13:56:32 +0800940 dev = class_find_device(&nodemgr_ne_class, &param, __match_ne_nodeid);
941 if (!dev)
942 return NULL;
943 ne = container_of(dev, struct node_entry, node_dev);
944 put_device(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945
Dave Young73cf6022008-01-22 13:56:32 +0800946 return ne;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700947}
948
949
950static void nodemgr_register_device(struct node_entry *ne,
951 struct unit_directory *ud, struct device *parent)
952{
953 memcpy(&ud->device, &nodemgr_dev_template_ud,
954 sizeof(ud->device));
955
956 ud->device.parent = parent;
957
958 snprintf(ud->device.bus_id, BUS_ID_SIZE, "%s-%u",
959 ne->device.bus_id, ud->id);
960
Kay Sieversdd7f2922007-05-25 11:50:53 +0200961 ud->unit_dev.parent = &ud->device;
962 ud->unit_dev.class = &nodemgr_ud_class;
963 snprintf(ud->unit_dev.bus_id, BUS_ID_SIZE, "%s-%u",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964 ne->device.bus_id, ud->id);
965
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200966 if (device_register(&ud->device))
967 goto fail_devreg;
Kay Sieversdd7f2922007-05-25 11:50:53 +0200968 if (device_register(&ud->unit_dev))
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200969 goto fail_classdevreg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700970 get_device(&ud->device);
971
Linus Torvalds1da177e2005-04-16 15:20:36 -0700972 nodemgr_create_ud_dev_files(ud);
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200973
974 return;
975
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200976fail_classdevreg:
977 device_unregister(&ud->device);
978fail_devreg:
979 HPSB_ERR("Failed to create unit %s", ud->device.bus_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980}
981
982
983/* This implementation currently only scans the config rom and its
984 * immediate unit directories looking for software_id and
985 * software_version entries, in order to get driver autoloading working. */
986static struct unit_directory *nodemgr_process_unit_directory
987 (struct host_info *hi, struct node_entry *ne, struct csr1212_keyval *ud_kv,
988 unsigned int *id, struct unit_directory *parent)
989{
990 struct unit_directory *ud;
991 struct unit_directory *ud_child = NULL;
992 struct csr1212_dentry *dentry;
993 struct csr1212_keyval *kv;
994 u8 last_key_id = 0;
995
Stefan Richter85511582005-11-07 06:31:45 -0500996 ud = kzalloc(sizeof(*ud), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700997 if (!ud)
998 goto unit_directory_error;
999
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000 ud->ne = ne;
1001 ud->ignore_driver = ignore_drivers;
Stefan Richtera52938f2007-05-27 13:11:47 +02001002 ud->address = ud_kv->offset + CSR1212_REGISTER_SPACE_BASE;
Stefan Richterd7794c82007-05-27 13:17:15 +02001003 ud->directory_id = ud->address & 0xffffff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001004 ud->ud_kv = ud_kv;
1005 ud->id = (*id)++;
1006
1007 csr1212_for_each_dir_entry(ne->csr, kv, ud_kv, dentry) {
1008 switch (kv->key.id) {
1009 case CSR1212_KV_ID_VENDOR:
1010 if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
1011 ud->vendor_id = kv->value.immediate;
1012 ud->flags |= UNIT_DIRECTORY_VENDOR_ID;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001013 }
1014 break;
1015
1016 case CSR1212_KV_ID_MODEL:
1017 ud->model_id = kv->value.immediate;
1018 ud->flags |= UNIT_DIRECTORY_MODEL_ID;
1019 break;
1020
1021 case CSR1212_KV_ID_SPECIFIER_ID:
1022 ud->specifier_id = kv->value.immediate;
1023 ud->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
1024 break;
1025
1026 case CSR1212_KV_ID_VERSION:
1027 ud->version = kv->value.immediate;
1028 ud->flags |= UNIT_DIRECTORY_VERSION;
1029 break;
1030
1031 case CSR1212_KV_ID_DESCRIPTOR:
1032 if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
1033 CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
1034 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
1035 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
1036 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
1037 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
1038 switch (last_key_id) {
1039 case CSR1212_KV_ID_VENDOR:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040 csr1212_keep_keyval(kv);
Stefan Richter17a19b72007-09-15 14:50:25 +02001041 ud->vendor_name_kv = kv;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001042 break;
1043
1044 case CSR1212_KV_ID_MODEL:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001045 csr1212_keep_keyval(kv);
Stefan Richter17a19b72007-09-15 14:50:25 +02001046 ud->model_name_kv = kv;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001047 break;
1048
1049 }
1050 } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */
1051 break;
1052
1053 case CSR1212_KV_ID_DEPENDENT_INFO:
1054 /* Logical Unit Number */
1055 if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
1056 if (ud->flags & UNIT_DIRECTORY_HAS_LUN) {
Eric Sesterhennbfe89d72006-10-29 23:13:40 +03001057 ud_child = kmemdup(ud, sizeof(*ud_child), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001058 if (!ud_child)
1059 goto unit_directory_error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001060 nodemgr_register_device(ne, ud_child, &ne->device);
1061 ud_child = NULL;
1062
1063 ud->id = (*id)++;
1064 }
1065 ud->lun = kv->value.immediate;
1066 ud->flags |= UNIT_DIRECTORY_HAS_LUN;
1067
1068 /* Logical Unit Directory */
1069 } else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) {
1070 /* This should really be done in SBP2 as this is
1071 * doing SBP2 specific parsing.
1072 */
1073
1074 /* first register the parent unit */
1075 ud->flags |= UNIT_DIRECTORY_HAS_LUN_DIRECTORY;
1076 if (ud->device.bus != &ieee1394_bus_type)
1077 nodemgr_register_device(ne, ud, &ne->device);
1078
1079 /* process the child unit */
1080 ud_child = nodemgr_process_unit_directory(hi, ne, kv, id, ud);
1081
1082 if (ud_child == NULL)
1083 break;
1084
Kay Sievers312c0042005-11-16 09:00:00 +01001085 /* inherit unspecified values, the driver core picks it up */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086 if ((ud->flags & UNIT_DIRECTORY_MODEL_ID) &&
1087 !(ud_child->flags & UNIT_DIRECTORY_MODEL_ID))
1088 {
1089 ud_child->flags |= UNIT_DIRECTORY_MODEL_ID;
1090 ud_child->model_id = ud->model_id;
1091 }
1092 if ((ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) &&
1093 !(ud_child->flags & UNIT_DIRECTORY_SPECIFIER_ID))
1094 {
1095 ud_child->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
1096 ud_child->specifier_id = ud->specifier_id;
1097 }
1098 if ((ud->flags & UNIT_DIRECTORY_VERSION) &&
1099 !(ud_child->flags & UNIT_DIRECTORY_VERSION))
1100 {
1101 ud_child->flags |= UNIT_DIRECTORY_VERSION;
1102 ud_child->version = ud->version;
1103 }
1104
1105 /* register the child unit */
1106 ud_child->flags |= UNIT_DIRECTORY_LUN_DIRECTORY;
1107 nodemgr_register_device(ne, ud_child, &ud->device);
1108 }
1109
1110 break;
1111
Stefan Richterd7794c82007-05-27 13:17:15 +02001112 case CSR1212_KV_ID_DIRECTORY_ID:
1113 ud->directory_id = kv->value.immediate;
1114 break;
1115
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116 default:
1117 break;
1118 }
1119 last_key_id = kv->key.id;
1120 }
1121
1122 /* do not process child units here and only if not already registered */
1123 if (!parent && ud->device.bus != &ieee1394_bus_type)
1124 nodemgr_register_device(ne, ud, &ne->device);
1125
1126 return ud;
1127
1128unit_directory_error:
Jody McIntyre616b8592005-05-16 21:54:01 -07001129 kfree(ud);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001130 return NULL;
1131}
1132
1133
1134static void nodemgr_process_root_directory(struct host_info *hi, struct node_entry *ne)
1135{
1136 unsigned int ud_id = 0;
1137 struct csr1212_dentry *dentry;
Stefan Richter638d5bb2007-09-15 14:45:53 +02001138 struct csr1212_keyval *kv, *vendor_name_kv = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139 u8 last_key_id = 0;
1140
1141 ne->needs_probe = 0;
1142
1143 csr1212_for_each_dir_entry(ne->csr, kv, ne->csr->root_kv, dentry) {
1144 switch (kv->key.id) {
1145 case CSR1212_KV_ID_VENDOR:
1146 ne->vendor_id = kv->value.immediate;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001147 break;
1148
1149 case CSR1212_KV_ID_NODE_CAPABILITIES:
1150 ne->capabilities = kv->value.immediate;
1151 break;
1152
1153 case CSR1212_KV_ID_UNIT:
1154 nodemgr_process_unit_directory(hi, ne, kv, &ud_id, NULL);
1155 break;
1156
1157 case CSR1212_KV_ID_DESCRIPTOR:
1158 if (last_key_id == CSR1212_KV_ID_VENDOR) {
1159 if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
1160 CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
1161 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
1162 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
1163 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
1164 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165 csr1212_keep_keyval(kv);
Stefan Richter638d5bb2007-09-15 14:45:53 +02001166 vendor_name_kv = kv;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001167 }
1168 }
1169 break;
1170 }
1171 last_key_id = kv->key.id;
1172 }
1173
Stefan Richter93245472007-03-30 19:19:55 +02001174 if (ne->vendor_name_kv) {
Stefan Richter638d5bb2007-09-15 14:45:53 +02001175 kv = ne->vendor_name_kv;
1176 ne->vendor_name_kv = vendor_name_kv;
1177 csr1212_release_keyval(kv);
1178 } else if (vendor_name_kv) {
1179 ne->vendor_name_kv = vendor_name_kv;
1180 if (device_create_file(&ne->device,
1181 &dev_attr_ne_vendor_name_kv) != 0)
Stefan Richter9be51c52007-03-30 19:21:05 +02001182 HPSB_ERR("Failed to add sysfs attribute");
Stefan Richter93245472007-03-30 19:19:55 +02001183 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001184}
1185
1186#ifdef CONFIG_HOTPLUG
1187
Kay Sievers7eff2e72007-08-14 15:15:12 +02001188static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001189{
1190 struct unit_directory *ud;
Eric Rannaudbf624562007-03-30 22:23:12 -07001191 int retval = 0;
Olaf Hering9b19d852005-09-06 15:18:18 -07001192 /* ieee1394:venNmoNspNverN */
1193 char buf[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194
Kay Sieversdd7f2922007-05-25 11:50:53 +02001195 if (!dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001196 return -ENODEV;
1197
Kay Sieversdd7f2922007-05-25 11:50:53 +02001198 ud = container_of(dev, struct unit_directory, unit_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001199
1200 if (ud->ne->in_limbo || ud->ignore_driver)
1201 return -ENODEV;
1202
1203#define PUT_ENVP(fmt,val) \
1204do { \
Kay Sievers7eff2e72007-08-14 15:15:12 +02001205 retval = add_uevent_var(env, fmt, val); \
Eric Rannaudbf624562007-03-30 22:23:12 -07001206 if (retval) \
1207 return retval; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001208} while (0)
1209
1210 PUT_ENVP("VENDOR_ID=%06x", ud->vendor_id);
1211 PUT_ENVP("MODEL_ID=%06x", ud->model_id);
1212 PUT_ENVP("GUID=%016Lx", (unsigned long long)ud->ne->guid);
1213 PUT_ENVP("SPECIFIER_ID=%06x", ud->specifier_id);
1214 PUT_ENVP("VERSION=%06x", ud->version);
Olaf Hering9b19d852005-09-06 15:18:18 -07001215 snprintf(buf, sizeof(buf), "ieee1394:ven%08Xmo%08Xsp%08Xver%08X",
1216 ud->vendor_id,
1217 ud->model_id,
1218 ud->specifier_id,
1219 ud->version);
1220 PUT_ENVP("MODALIAS=%s", buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001221
1222#undef PUT_ENVP
1223
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224 return 0;
1225}
1226
1227#else
1228
Kay Sievers7eff2e72007-08-14 15:15:12 +02001229static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230{
1231 return -ENODEV;
1232}
1233
1234#endif /* CONFIG_HOTPLUG */
1235
1236
Ben Collinsed30c262006-11-23 13:59:48 -05001237int __hpsb_register_protocol(struct hpsb_protocol_driver *drv,
1238 struct module *owner)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001239{
Ben Collinsed30c262006-11-23 13:59:48 -05001240 int error;
1241
1242 drv->driver.bus = &ieee1394_bus_type;
1243 drv->driver.owner = owner;
1244 drv->driver.name = drv->name;
1245
Linus Torvalds1da177e2005-04-16 15:20:36 -07001246 /* This will cause a probe for devices */
Ben Collinsed30c262006-11-23 13:59:48 -05001247 error = driver_register(&drv->driver);
Stefan Richter7fdfc902006-10-21 01:23:56 +02001248 if (!error)
Ben Collinsed30c262006-11-23 13:59:48 -05001249 nodemgr_create_drv_files(drv);
Stefan Richter7fdfc902006-10-21 01:23:56 +02001250 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001251}
1252
1253void hpsb_unregister_protocol(struct hpsb_protocol_driver *driver)
1254{
1255 nodemgr_remove_drv_files(driver);
1256 /* This will subsequently disconnect all devices that our driver
1257 * is attached to. */
1258 driver_unregister(&driver->driver);
1259}
1260
1261
1262/*
1263 * This function updates nodes that were present on the bus before the
1264 * reset and still are after the reset. The nodeid and the config rom
1265 * may have changed, and the drivers managing this device must be
1266 * informed that this device just went through a bus reset, to allow
1267 * the to take whatever actions required.
1268 */
1269static void nodemgr_update_node(struct node_entry *ne, struct csr1212_csr *csr,
1270 struct host_info *hi, nodeid_t nodeid,
1271 unsigned int generation)
1272{
1273 if (ne->nodeid != nodeid) {
1274 HPSB_DEBUG("Node changed: " NODE_BUS_FMT " -> " NODE_BUS_FMT,
1275 NODE_BUS_ARGS(ne->host, ne->nodeid),
1276 NODE_BUS_ARGS(ne->host, nodeid));
1277 ne->nodeid = nodeid;
1278 }
1279
1280 if (ne->busopt.generation != ((be32_to_cpu(csr->bus_info_data[2]) >> 4) & 0xf)) {
1281 kfree(ne->csr->private);
1282 csr1212_destroy_csr(ne->csr);
1283 ne->csr = csr;
1284
1285 /* If the node's configrom generation has changed, we
1286 * unregister all the unit directories. */
1287 nodemgr_remove_uds(ne);
1288
1289 nodemgr_update_bus_options(ne);
1290
1291 /* Mark the node as new, so it gets re-probed */
1292 ne->needs_probe = 1;
1293 } else {
1294 /* old cache is valid, so update its generation */
1295 struct nodemgr_csr_info *ci = ne->csr->private;
1296 ci->generation = generation;
1297 /* free the partially filled now unneeded new cache */
1298 kfree(csr->private);
1299 csr1212_destroy_csr(csr);
1300 }
1301
1302 if (ne->in_limbo)
1303 nodemgr_resume_ne(ne);
1304
1305 /* Mark the node current */
1306 ne->generation = generation;
1307}
1308
1309
1310
1311static void nodemgr_node_scan_one(struct host_info *hi,
1312 nodeid_t nodeid, int generation)
1313{
1314 struct hpsb_host *host = hi->host;
1315 struct node_entry *ne;
1316 octlet_t guid;
1317 struct csr1212_csr *csr;
1318 struct nodemgr_csr_info *ci;
Stefan Richterd7530a12006-07-03 00:58:01 +02001319 u8 *speed;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001320
Stefan Richter85511582005-11-07 06:31:45 -05001321 ci = kmalloc(sizeof(*ci), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001322 if (!ci)
1323 return;
1324
1325 ci->host = host;
1326 ci->nodeid = nodeid;
1327 ci->generation = generation;
Stefan Richterd7530a12006-07-03 00:58:01 +02001328
1329 /* Prepare for speed probe which occurs when reading the ROM */
1330 speed = &(host->speed[NODEID_TO_NODE(nodeid)]);
1331 if (*speed > host->csr.lnk_spd)
1332 *speed = host->csr.lnk_spd;
1333 ci->speed_unverified = *speed > IEEE1394_SPEED_100;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001334
1335 /* We need to detect when the ConfigROM's generation has changed,
1336 * so we only update the node's info when it needs to be. */
1337
1338 csr = csr1212_create_csr(&nodemgr_csr_ops, 5 * sizeof(quadlet_t), ci);
1339 if (!csr || csr1212_parse_csr(csr) != CSR1212_SUCCESS) {
1340 HPSB_ERR("Error parsing configrom for node " NODE_BUS_FMT,
1341 NODE_BUS_ARGS(host, nodeid));
1342 if (csr)
1343 csr1212_destroy_csr(csr);
1344 kfree(ci);
1345 return;
1346 }
1347
1348 if (csr->bus_info_data[1] != IEEE1394_BUSID_MAGIC) {
1349 /* This isn't a 1394 device, but we let it slide. There
1350 * was a report of a device with broken firmware which
1351 * reported '2394' instead of '1394', which is obviously a
1352 * mistake. One would hope that a non-1394 device never
1353 * gets connected to Firewire bus. If someone does, we
1354 * shouldn't be held responsible, so we'll allow it with a
1355 * warning. */
1356 HPSB_WARN("Node " NODE_BUS_FMT " has invalid busID magic [0x%08x]",
1357 NODE_BUS_ARGS(host, nodeid), csr->bus_info_data[1]);
1358 }
1359
1360 guid = ((u64)be32_to_cpu(csr->bus_info_data[3]) << 32) | be32_to_cpu(csr->bus_info_data[4]);
1361 ne = find_entry_by_guid(guid);
1362
1363 if (ne && ne->host != host && ne->in_limbo) {
1364 /* Must have moved this device from one host to another */
1365 nodemgr_remove_ne(ne);
1366 ne = NULL;
1367 }
1368
1369 if (!ne)
1370 nodemgr_create_node(guid, csr, hi, nodeid, generation);
1371 else
1372 nodemgr_update_node(ne, csr, hi, nodeid, generation);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001373}
1374
1375
1376static void nodemgr_node_scan(struct host_info *hi, int generation)
1377{
Stefan Richterd41bba22006-11-22 21:28:19 +01001378 int count;
1379 struct hpsb_host *host = hi->host;
1380 struct selfid *sid = (struct selfid *)host->topology_map;
1381 nodeid_t nodeid = LOCAL_BUS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001382
Stefan Richterd41bba22006-11-22 21:28:19 +01001383 /* Scan each node on the bus */
1384 for (count = host->selfid_count; count; count--, sid++) {
1385 if (sid->extended)
1386 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001387
Stefan Richterd41bba22006-11-22 21:28:19 +01001388 if (!sid->link_active) {
1389 nodeid++;
1390 continue;
1391 }
1392 nodemgr_node_scan_one(hi, nodeid++, generation);
1393 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001394}
1395
Dave Young73cf6022008-01-22 13:56:32 +08001396static int __nodemgr_driver_suspend(struct device *dev, void *data)
1397{
1398 struct unit_directory *ud;
1399 struct device_driver *drv;
1400 struct node_entry *ne = (struct node_entry *)data;
1401 int error;
1402
1403 ud = container_of(dev, struct unit_directory, unit_dev);
1404 if (ud->ne == ne) {
1405 drv = get_driver(ud->device.driver);
1406 if (drv) {
1407 error = 1; /* release if suspend is not implemented */
1408 if (drv->suspend) {
1409 down(&ud->device.sem);
1410 error = drv->suspend(&ud->device, PMSG_SUSPEND);
1411 up(&ud->device.sem);
1412 }
1413 if (error)
1414 device_release_driver(&ud->device);
1415 put_driver(drv);
1416 }
1417 }
1418
1419 return 0;
1420}
1421
1422static int __nodemgr_driver_resume(struct device *dev, void *data)
1423{
1424 struct unit_directory *ud;
1425 struct device_driver *drv;
1426 struct node_entry *ne = (struct node_entry *)data;
1427
1428 ud = container_of(dev, struct unit_directory, unit_dev);
1429 if (ud->ne == ne) {
1430 drv = get_driver(ud->device.driver);
1431 if (drv) {
1432 if (drv->resume) {
1433 down(&ud->device.sem);
1434 drv->resume(&ud->device);
1435 up(&ud->device.sem);
1436 }
1437 put_driver(drv);
1438 }
1439 }
1440
1441 return 0;
1442}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001443
1444static void nodemgr_suspend_ne(struct node_entry *ne)
1445{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001446 HPSB_DEBUG("Node suspended: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
Dave Young73cf6022008-01-22 13:56:32 +08001447 NODE_BUS_ARGS(ne->host, ne->nodeid),
1448 (unsigned long long)ne->guid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001449
1450 ne->in_limbo = 1;
Stefan Richterc1c9c7c2006-10-10 21:19:21 +02001451 WARN_ON(device_create_file(&ne->device, &dev_attr_ne_in_limbo));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001452
Dave Young73cf6022008-01-22 13:56:32 +08001453 class_for_each_device(&nodemgr_ud_class, ne, __nodemgr_driver_suspend);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001454}
1455
1456
1457static void nodemgr_resume_ne(struct node_entry *ne)
1458{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001459 ne->in_limbo = 0;
1460 device_remove_file(&ne->device, &dev_attr_ne_in_limbo);
1461
Dave Young73cf6022008-01-22 13:56:32 +08001462 class_for_each_device(&nodemgr_ud_class, ne, __nodemgr_driver_resume);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001463 HPSB_DEBUG("Node resumed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
1464 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
1465}
1466
Dave Young73cf6022008-01-22 13:56:32 +08001467static int __nodemgr_update_pdrv(struct device *dev, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001468{
Stefan Richtera0e857e2007-06-17 23:47:45 +02001469 struct unit_directory *ud;
1470 struct device_driver *drv;
1471 struct hpsb_protocol_driver *pdrv;
Dave Young73cf6022008-01-22 13:56:32 +08001472 struct node_entry *ne = (struct node_entry *)data;
Stefan Richtera0e857e2007-06-17 23:47:45 +02001473 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001474
Dave Young73cf6022008-01-22 13:56:32 +08001475 ud = container_of(dev, struct unit_directory, unit_dev);
1476 if (ud->ne == ne) {
Stefan Richtera0e857e2007-06-17 23:47:45 +02001477 drv = get_driver(ud->device.driver);
Dave Young73cf6022008-01-22 13:56:32 +08001478 if (drv) {
1479 error = 0;
1480 pdrv = container_of(drv, struct hpsb_protocol_driver,
1481 driver);
1482 if (pdrv->update) {
1483 down(&ud->device.sem);
1484 error = pdrv->update(ud);
1485 up(&ud->device.sem);
1486 }
1487 if (error)
1488 device_release_driver(&ud->device);
1489 put_driver(drv);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001490 }
1491 }
Dave Young73cf6022008-01-22 13:56:32 +08001492
1493 return 0;
1494}
1495
1496static void nodemgr_update_pdrv(struct node_entry *ne)
1497{
1498 class_for_each_device(&nodemgr_ud_class, ne, __nodemgr_update_pdrv);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001499}
1500
1501
Stefan Richter61c7f772005-12-05 16:28:59 -05001502/* Write the BROADCAST_CHANNEL as per IEEE1394a 8.3.2.3.11 and 8.4.2.3. This
1503 * seems like an optional service but in the end it is practically mandatory
1504 * as a consequence of these clauses.
1505 *
1506 * Note that we cannot do a broadcast write to all nodes at once because some
1507 * pre-1394a devices would hang. */
1508static void nodemgr_irm_write_bc(struct node_entry *ne, int generation)
1509{
1510 const u64 bc_addr = (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL);
1511 quadlet_t bc_remote, bc_local;
Stefan Richter7fdfc902006-10-21 01:23:56 +02001512 int error;
Stefan Richter61c7f772005-12-05 16:28:59 -05001513
1514 if (!ne->host->is_irm || ne->generation != generation ||
1515 ne->nodeid == ne->host->node_id)
1516 return;
1517
1518 bc_local = cpu_to_be32(ne->host->csr.broadcast_channel);
1519
1520 /* Check if the register is implemented and 1394a compliant. */
Stefan Richter7fdfc902006-10-21 01:23:56 +02001521 error = hpsb_read(ne->host, ne->nodeid, generation, bc_addr, &bc_remote,
1522 sizeof(bc_remote));
1523 if (!error && bc_remote & cpu_to_be32(0x80000000) &&
Stefan Richter61c7f772005-12-05 16:28:59 -05001524 bc_remote != bc_local)
1525 hpsb_node_write(ne, bc_addr, &bc_local, sizeof(bc_local));
1526}
1527
1528
Linus Torvalds1da177e2005-04-16 15:20:36 -07001529static void nodemgr_probe_ne(struct host_info *hi, struct node_entry *ne, int generation)
1530{
1531 struct device *dev;
1532
1533 if (ne->host != hi->host || ne->in_limbo)
1534 return;
1535
1536 dev = get_device(&ne->device);
1537 if (!dev)
1538 return;
1539
Stefan Richter61c7f772005-12-05 16:28:59 -05001540 nodemgr_irm_write_bc(ne, generation);
1541
Linus Torvalds1da177e2005-04-16 15:20:36 -07001542 /* If "needs_probe", then this is either a new or changed node we
1543 * rescan totally. If the generation matches for an existing node
1544 * (one that existed prior to the bus reset) we send update calls
1545 * down to the drivers. Otherwise, this is a dead node and we
1546 * suspend it. */
1547 if (ne->needs_probe)
1548 nodemgr_process_root_directory(hi, ne);
1549 else if (ne->generation == generation)
1550 nodemgr_update_pdrv(ne);
1551 else
1552 nodemgr_suspend_ne(ne);
1553
1554 put_device(dev);
1555}
1556
Dave Young73cf6022008-01-22 13:56:32 +08001557struct probe_param {
1558 struct host_info *hi;
1559 int generation;
1560};
1561
1562static int __nodemgr_node_probe(struct device *dev, void *data)
1563{
1564 struct probe_param *param = (struct probe_param *)data;
1565 struct node_entry *ne;
1566
1567 ne = container_of(dev, struct node_entry, node_dev);
1568 if (!ne->needs_probe)
1569 nodemgr_probe_ne(param->hi, ne, param->generation);
1570 if (ne->needs_probe)
1571 nodemgr_probe_ne(param->hi, ne, param->generation);
1572 return 0;
1573}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001574
1575static void nodemgr_node_probe(struct host_info *hi, int generation)
1576{
1577 struct hpsb_host *host = hi->host;
Dave Young73cf6022008-01-22 13:56:32 +08001578 struct probe_param param;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001579
Dave Young73cf6022008-01-22 13:56:32 +08001580 param.hi = hi;
1581 param.generation = generation;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001582 /* Do some processing of the nodes we've probed. This pulls them
1583 * into the sysfs layer if needed, and can result in processing of
1584 * unit-directories, or just updating the node and it's
Stefan Richter51c1d802005-12-12 23:03:19 -05001585 * unit-directories.
1586 *
1587 * Run updates before probes. Usually, updates are time-critical
1588 * while probes are time-consuming. (Well, those probes need some
1589 * improvement...) */
1590
Dave Young73cf6022008-01-22 13:56:32 +08001591 class_for_each_device(&nodemgr_ne_class, &param, __nodemgr_node_probe);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001592
1593 /* If we had a bus reset while we were scanning the bus, it is
1594 * possible that we did not probe all nodes. In that case, we
1595 * skip the clean up for now, since we could remove nodes that
Stefan Richterd2f119f2006-07-03 12:02:35 -04001596 * were still on the bus. Another bus scan is pending which will
1597 * do the clean up eventually.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001598 *
1599 * Now let's tell the bus to rescan our devices. This may seem
1600 * like overhead, but the driver-model core will only scan a
1601 * device for a driver when either the device is added, or when a
1602 * new driver is added. A bus reset is a good reason to rescan
1603 * devices that were there before. For example, an sbp2 device
1604 * may become available for login, if the host that held it was
1605 * just removed. */
1606
1607 if (generation == get_hpsb_generation(host))
Stefan Richter1f72cf52006-10-29 23:09:11 +01001608 if (bus_rescan_devices(&ieee1394_bus_type))
1609 HPSB_DEBUG("bus_rescan_devices had an error");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001610}
1611
Stefan Richter14c0fa22005-12-01 18:51:52 -05001612static int nodemgr_send_resume_packet(struct hpsb_host *host)
1613{
1614 struct hpsb_packet *packet;
Stefan Richter7fdfc902006-10-21 01:23:56 +02001615 int error = -ENOMEM;
Stefan Richter14c0fa22005-12-01 18:51:52 -05001616
1617 packet = hpsb_make_phypacket(host,
Stefan Richterd7758462005-12-01 18:51:56 -05001618 EXTPHYPACKET_TYPE_RESUME |
1619 NODEID_TO_NODE(host->node_id) << PHYPACKET_PORT_SHIFT);
Stefan Richter14c0fa22005-12-01 18:51:52 -05001620 if (packet) {
1621 packet->no_waiter = 1;
1622 packet->generation = get_hpsb_generation(host);
Stefan Richter7fdfc902006-10-21 01:23:56 +02001623 error = hpsb_send_packet(packet);
Stefan Richter14c0fa22005-12-01 18:51:52 -05001624 }
Stefan Richter7fdfc902006-10-21 01:23:56 +02001625 if (error)
Stefan Richter14c0fa22005-12-01 18:51:52 -05001626 HPSB_WARN("fw-host%d: Failed to broadcast resume packet",
1627 host->id);
Stefan Richter7fdfc902006-10-21 01:23:56 +02001628 return error;
Stefan Richter14c0fa22005-12-01 18:51:52 -05001629}
1630
Stefan Richter61c7f772005-12-05 16:28:59 -05001631/* Perform a few high-level IRM responsibilities. */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001632static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles)
1633{
1634 quadlet_t bc;
1635
1636 /* if irm_id == -1 then there is no IRM on this bus */
1637 if (!host->is_irm || host->irm_id == (nodeid_t)-1)
1638 return 1;
1639
Stefan Richter61c7f772005-12-05 16:28:59 -05001640 /* We are a 1394a-2000 compliant IRM. Set the validity bit. */
1641 host->csr.broadcast_channel |= 0x40000000;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001642
1643 /* If there is no bus manager then we should set the root node's
1644 * force_root bit to promote bus stability per the 1394
1645 * spec. (8.4.2.6) */
1646 if (host->busmgr_id == 0xffff && host->node_count > 1)
1647 {
1648 u16 root_node = host->node_count - 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001649
Jody McIntyre328699b2005-09-30 11:59:08 -07001650 /* get cycle master capability flag from root node */
1651 if (host->is_cycmst ||
1652 (!hpsb_read(host, LOCAL_BUS | root_node, get_hpsb_generation(host),
1653 (CSR_REGISTER_BASE + CSR_CONFIG_ROM + 2 * sizeof(quadlet_t)),
1654 &bc, sizeof(quadlet_t)) &&
1655 be32_to_cpu(bc) & 1 << CSR_CMC_SHIFT))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001656 hpsb_send_phy_config(host, root_node, -1);
1657 else {
1658 HPSB_DEBUG("The root node is not cycle master capable; "
1659 "selecting a new root node and resetting...");
1660
1661 if (cycles >= 5) {
1662 /* Oh screw it! Just leave the bus as it is */
1663 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1664 return 1;
1665 }
1666
1667 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1668 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1669
1670 return 0;
1671 }
1672 }
1673
Stefan Richter14c0fa22005-12-01 18:51:52 -05001674 /* Some devices suspend their ports while being connected to an inactive
1675 * host adapter, i.e. if connected before the low-level driver is
1676 * loaded. They become visible either when physically unplugged and
1677 * replugged, or when receiving a resume packet. Send one once. */
1678 if (!host->resume_packet_sent && !nodemgr_send_resume_packet(host))
1679 host->resume_packet_sent = 1;
1680
Linus Torvalds1da177e2005-04-16 15:20:36 -07001681 return 1;
1682}
1683
1684/* We need to ensure that if we are not the IRM, that the IRM node is capable of
1685 * everything we can do, otherwise issue a bus reset and try to become the IRM
1686 * ourselves. */
1687static int nodemgr_check_irm_capability(struct hpsb_host *host, int cycles)
1688{
1689 quadlet_t bc;
1690 int status;
1691
1692 if (hpsb_disable_irm || host->is_irm)
1693 return 1;
1694
1695 status = hpsb_read(host, LOCAL_BUS | (host->irm_id),
1696 get_hpsb_generation(host),
1697 (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL),
1698 &bc, sizeof(quadlet_t));
1699
1700 if (status < 0 || !(be32_to_cpu(bc) & 0x80000000)) {
1701 /* The current irm node does not have a valid BROADCAST_CHANNEL
1702 * register and we do, so reset the bus with force_root set */
1703 HPSB_DEBUG("Current remote IRM is not 1394a-2000 compliant, resetting...");
1704
1705 if (cycles >= 5) {
1706 /* Oh screw it! Just leave the bus as it is */
1707 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1708 return 1;
1709 }
1710
1711 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1712 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1713
1714 return 0;
1715 }
1716
1717 return 1;
1718}
1719
1720static int nodemgr_host_thread(void *__hi)
1721{
1722 struct host_info *hi = (struct host_info *)__hi;
1723 struct hpsb_host *host = hi->host;
Stefan Richterb7a71792006-10-06 19:49:52 +02001724 unsigned int g, generation = 0;
Stefan Richterd2f119f2006-07-03 12:02:35 -04001725 int i, reset_cycles = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001726
Rafael J. Wysocki83144182007-07-17 04:03:35 -07001727 set_freezable();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001728 /* Setup our device-model entries */
1729 nodemgr_create_host_dev_files(host);
1730
Stefan Richterd2f119f2006-07-03 12:02:35 -04001731 for (;;) {
1732 /* Sleep until next bus reset */
1733 set_current_state(TASK_INTERRUPTIBLE);
Stefan Richtera65421e2007-02-10 22:06:18 +01001734 if (get_hpsb_generation(host) == generation &&
1735 !kthread_should_stop())
Stefan Richterd2f119f2006-07-03 12:02:35 -04001736 schedule();
1737 __set_current_state(TASK_RUNNING);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001738
Stefan Richterd2f119f2006-07-03 12:02:35 -04001739 /* Thread may have been woken up to freeze or to exit */
1740 if (try_to_freeze())
1741 continue;
1742 if (kthread_should_stop())
1743 goto exit;
1744
Linus Torvalds1da177e2005-04-16 15:20:36 -07001745 /* Pause for 1/4 second in 1/16 second intervals,
1746 * to make sure things settle down. */
Stefan Richterd2f119f2006-07-03 12:02:35 -04001747 g = get_hpsb_generation(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001748 for (i = 0; i < 4 ; i++) {
Satyam Sharma69e2b602007-08-15 20:05:38 +05301749 msleep_interruptible(63);
1750 if (kthread_should_stop())
Stefan Richtera0e857e2007-06-17 23:47:45 +02001751 goto exit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001752
1753 /* Now get the generation in which the node ID's we collect
1754 * are valid. During the bus scan we will use this generation
1755 * for the read transactions, so that if another reset occurs
1756 * during the scan the transactions will fail instead of
1757 * returning bogus data. */
1758 generation = get_hpsb_generation(host);
1759
1760 /* If we get a reset before we are done waiting, then
Michael Opdenacker59c51592007-05-09 08:57:56 +02001761 * start the waiting over again */
Stefan Richterd2f119f2006-07-03 12:02:35 -04001762 if (generation != g)
1763 g = generation, i = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001764 }
1765
Jody McIntyre328699b2005-09-30 11:59:08 -07001766 if (!nodemgr_check_irm_capability(host, reset_cycles) ||
1767 !nodemgr_do_irm_duties(host, reset_cycles)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001768 reset_cycles++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001769 continue;
1770 }
Jody McIntyre328699b2005-09-30 11:59:08 -07001771 reset_cycles = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001772
1773 /* Scan our nodes to get the bus options and create node
1774 * entries. This does not do the sysfs stuff, since that
Kay Sievers312c0042005-11-16 09:00:00 +01001775 * would trigger uevents and such, which is a bad idea at
1776 * this point. */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001777 nodemgr_node_scan(hi, generation);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001778
1779 /* This actually does the full probe, with sysfs
1780 * registration. */
1781 nodemgr_node_probe(hi, generation);
1782
1783 /* Update some of our sysfs symlinks */
1784 nodemgr_update_host_dev_links(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001785 }
Stefan Richterd2f119f2006-07-03 12:02:35 -04001786exit:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001787 HPSB_VERBOSE("NodeMgr: Exiting thread");
Stefan Richterd2f119f2006-07-03 12:02:35 -04001788 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001789}
1790
Dave Young73cf6022008-01-22 13:56:32 +08001791struct host_iter_param {
1792 void *data;
1793 int (*cb)(struct hpsb_host *, void *);
1794};
1795
1796static int __nodemgr_for_each_host(struct device *dev, void *data)
1797{
1798 struct hpsb_host *host;
1799 struct host_iter_param *hip = (struct host_iter_param *)data;
1800 int error = 0;
1801
1802 host = container_of(dev, struct hpsb_host, host_dev);
1803 error = hip->cb(host, hip->data);
1804
1805 return error;
1806}
Stefan Richterafd65462007-03-05 03:06:23 +01001807/**
1808 * nodemgr_for_each_host - call a function for each IEEE 1394 host
1809 * @data: an address to supply to the callback
1810 * @cb: function to call for each host
1811 *
1812 * Iterate the hosts, calling a given function with supplied data for each host.
1813 * If the callback fails on a host, i.e. if it returns a non-zero value, the
1814 * iteration is stopped.
1815 *
1816 * Return value: 0 on success, non-zero on failure (same as returned by last run
1817 * of the callback).
1818 */
1819int nodemgr_for_each_host(void *data, int (*cb)(struct hpsb_host *, void *))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001820{
Dave Young73cf6022008-01-22 13:56:32 +08001821 struct host_iter_param hip;
1822 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001823
Dave Young73cf6022008-01-22 13:56:32 +08001824 hip.cb = cb;
1825 hip.data = data;
1826 error = class_for_each_device(&hpsb_host_class, &hip,
1827 __nodemgr_for_each_host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001828
1829 return error;
1830}
1831
Stefan Richteref815332007-03-05 03:05:32 +01001832/* The following two convenience functions use a struct node_entry
Linus Torvalds1da177e2005-04-16 15:20:36 -07001833 * for addressing a node on the bus. They are intended for use by any
1834 * process context, not just the nodemgr thread, so we need to be a
1835 * little careful when reading out the node ID and generation. The
1836 * thing that can go wrong is that we get the node ID, then a bus
1837 * reset occurs, and then we read the generation. The node ID is
1838 * possibly invalid, but the generation is current, and we end up
1839 * sending a packet to a the wrong node.
1840 *
1841 * The solution is to make sure we read the generation first, so that
1842 * if a reset occurs in the process, we end up with a stale generation
1843 * and the transactions will fail instead of silently using wrong node
1844 * ID's.
1845 */
1846
Stefan Richterafd65462007-03-05 03:06:23 +01001847/**
1848 * hpsb_node_fill_packet - fill some destination information into a packet
1849 * @ne: destination node
1850 * @packet: packet to fill in
1851 *
1852 * This will fill in the given, pre-initialised hpsb_packet with the current
1853 * information from the node entry (host, node ID, bus generation number).
1854 */
1855void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *packet)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001856{
Stefan Richterafd65462007-03-05 03:06:23 +01001857 packet->host = ne->host;
1858 packet->generation = ne->generation;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001859 barrier();
Stefan Richterafd65462007-03-05 03:06:23 +01001860 packet->node_id = ne->nodeid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001861}
1862
1863int hpsb_node_write(struct node_entry *ne, u64 addr,
1864 quadlet_t *buffer, size_t length)
1865{
1866 unsigned int generation = ne->generation;
1867
1868 barrier();
1869 return hpsb_write(ne->host, ne->nodeid, generation,
1870 addr, buffer, length);
1871}
1872
1873static void nodemgr_add_host(struct hpsb_host *host)
1874{
1875 struct host_info *hi;
1876
1877 hi = hpsb_create_hostinfo(&nodemgr_highlevel, host, sizeof(*hi));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001878 if (!hi) {
Stefan Richterd2f119f2006-07-03 12:02:35 -04001879 HPSB_ERR("NodeMgr: out of memory in add host");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001880 return;
1881 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001882 hi->host = host;
Stefan Richterd2f119f2006-07-03 12:02:35 -04001883 hi->thread = kthread_run(nodemgr_host_thread, hi, "knodemgrd_%d",
1884 host->id);
1885 if (IS_ERR(hi->thread)) {
1886 HPSB_ERR("NodeMgr: cannot start thread for host %d", host->id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001887 hpsb_destroy_hostinfo(&nodemgr_highlevel, host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001888 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001889}
1890
1891static void nodemgr_host_reset(struct hpsb_host *host)
1892{
1893 struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1894
Stefan Richterd2f119f2006-07-03 12:02:35 -04001895 if (hi) {
1896 HPSB_VERBOSE("NodeMgr: Processing reset for host %d", host->id);
1897 wake_up_process(hi->thread);
1898 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001899}
1900
1901static void nodemgr_remove_host(struct hpsb_host *host)
1902{
1903 struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1904
1905 if (hi) {
Stefan Richterd2f119f2006-07-03 12:02:35 -04001906 kthread_stop(hi->thread);
1907 nodemgr_remove_host_dev(&host->device);
1908 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001909}
1910
1911static struct hpsb_highlevel nodemgr_highlevel = {
1912 .name = "Node manager",
1913 .add_host = nodemgr_add_host,
1914 .host_reset = nodemgr_host_reset,
1915 .remove_host = nodemgr_remove_host,
1916};
1917
1918int init_ieee1394_nodemgr(void)
1919{
Stefan Richter7fdfc902006-10-21 01:23:56 +02001920 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001921
Stefan Richter7fdfc902006-10-21 01:23:56 +02001922 error = class_register(&nodemgr_ne_class);
1923 if (error)
Stefan Richter91efa462007-02-06 02:34:45 +01001924 goto fail_ne;
Stefan Richter7fdfc902006-10-21 01:23:56 +02001925 error = class_register(&nodemgr_ud_class);
Stefan Richter91efa462007-02-06 02:34:45 +01001926 if (error)
1927 goto fail_ud;
Stefan Richter8252bbb2006-11-22 21:09:42 +01001928 error = driver_register(&nodemgr_mid_layer_driver);
Stefan Richter91efa462007-02-06 02:34:45 +01001929 if (error)
1930 goto fail_ml;
1931 /* This driver is not used if nodemgr is off (disable_nodemgr=1). */
1932 nodemgr_dev_template_host.driver = &nodemgr_mid_layer_driver;
1933
Linus Torvalds1da177e2005-04-16 15:20:36 -07001934 hpsb_register_highlevel(&nodemgr_highlevel);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001935 return 0;
Stefan Richter91efa462007-02-06 02:34:45 +01001936
1937fail_ml:
1938 class_unregister(&nodemgr_ud_class);
1939fail_ud:
1940 class_unregister(&nodemgr_ne_class);
1941fail_ne:
1942 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001943}
1944
1945void cleanup_ieee1394_nodemgr(void)
1946{
Stefan Richterd41bba22006-11-22 21:28:19 +01001947 hpsb_unregister_highlevel(&nodemgr_highlevel);
Stefan Richter91efa462007-02-06 02:34:45 +01001948 driver_unregister(&nodemgr_mid_layer_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001949 class_unregister(&nodemgr_ud_class);
1950 class_unregister(&nodemgr_ne_class);
1951}