blob: 05710c7c12206aa1a9fcca8bad4db2eac3be7697 [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);
Stefan Richter07c72242008-05-01 10:43:04 +0200523 id = driver->id_table;
524 if (!id)
525 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526
Stefan Richter07c72242008-05-01 10:43:04 +0200527 for (; id->match_flags != 0; id++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528 int need_coma = 0;
529
530 if (id->match_flags & IEEE1394_MATCH_VENDOR_ID) {
531 length += sprintf(scratch, "vendor_id=0x%06x", id->vendor_id);
532 scratch = buf + length;
533 need_coma++;
534 }
535
536 if (id->match_flags & IEEE1394_MATCH_MODEL_ID) {
537 length += sprintf(scratch, "%smodel_id=0x%06x",
538 need_coma++ ? "," : "",
539 id->model_id);
540 scratch = buf + length;
541 }
542
543 if (id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) {
544 length += sprintf(scratch, "%sspecifier_id=0x%06x",
545 need_coma++ ? "," : "",
546 id->specifier_id);
547 scratch = buf + length;
548 }
549
550 if (id->match_flags & IEEE1394_MATCH_VERSION) {
551 length += sprintf(scratch, "%sversion=0x%06x",
552 need_coma++ ? "," : "",
553 id->version);
554 scratch = buf + length;
555 }
556
557 if (need_coma) {
558 *scratch++ = '\n';
559 length++;
560 }
561 }
562
563 return length;
564}
565static DRIVER_ATTR(device_ids,S_IRUGO,fw_show_drv_device_ids,NULL);
566
567
568fw_drv_attr(name, const char *, "%s\n")
569
570static struct driver_attribute *const fw_drv_attrs[] = {
571 &driver_attr_drv_name,
572 &driver_attr_device_ids,
573};
574
575
576static void nodemgr_create_drv_files(struct hpsb_protocol_driver *driver)
577{
578 struct device_driver *drv = &driver->driver;
579 int i;
580
581 for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200582 if (driver_create_file(drv, fw_drv_attrs[i]))
583 goto fail;
584 return;
585fail:
Stefan Richter9be51c52007-03-30 19:21:05 +0200586 HPSB_ERR("Failed to add sysfs attribute");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587}
588
589
590static void nodemgr_remove_drv_files(struct hpsb_protocol_driver *driver)
591{
592 struct device_driver *drv = &driver->driver;
593 int i;
594
595 for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
596 driver_remove_file(drv, fw_drv_attrs[i]);
597}
598
599
600static void nodemgr_create_ne_dev_files(struct node_entry *ne)
601{
602 struct device *dev = &ne->device;
603 int i;
604
605 for (i = 0; i < ARRAY_SIZE(fw_ne_attrs); i++)
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200606 if (device_create_file(dev, fw_ne_attrs[i]))
607 goto fail;
608 return;
609fail:
Stefan Richter9be51c52007-03-30 19:21:05 +0200610 HPSB_ERR("Failed to add sysfs attribute");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611}
612
613
614static void nodemgr_create_host_dev_files(struct hpsb_host *host)
615{
616 struct device *dev = &host->device;
617 int i;
618
619 for (i = 0; i < ARRAY_SIZE(fw_host_attrs); i++)
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200620 if (device_create_file(dev, fw_host_attrs[i]))
621 goto fail;
622 return;
623fail:
Stefan Richter9be51c52007-03-30 19:21:05 +0200624 HPSB_ERR("Failed to add sysfs attribute");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625}
626
627
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200628static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host,
629 nodeid_t nodeid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630
631static void nodemgr_update_host_dev_links(struct hpsb_host *host)
632{
633 struct device *dev = &host->device;
634 struct node_entry *ne;
635
636 sysfs_remove_link(&dev->kobj, "irm_id");
637 sysfs_remove_link(&dev->kobj, "busmgr_id");
638 sysfs_remove_link(&dev->kobj, "host_id");
639
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200640 if ((ne = find_entry_by_nodeid(host, host->irm_id)) &&
641 sysfs_create_link(&dev->kobj, &ne->device.kobj, "irm_id"))
642 goto fail;
643 if ((ne = find_entry_by_nodeid(host, host->busmgr_id)) &&
644 sysfs_create_link(&dev->kobj, &ne->device.kobj, "busmgr_id"))
645 goto fail;
646 if ((ne = find_entry_by_nodeid(host, host->node_id)) &&
647 sysfs_create_link(&dev->kobj, &ne->device.kobj, "host_id"))
648 goto fail;
649 return;
650fail:
651 HPSB_ERR("Failed to update sysfs attributes for host %d", host->id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652}
653
654static void nodemgr_create_ud_dev_files(struct unit_directory *ud)
655{
656 struct device *dev = &ud->device;
657 int i;
658
659 for (i = 0; i < ARRAY_SIZE(fw_ud_attrs); i++)
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200660 if (device_create_file(dev, fw_ud_attrs[i]))
661 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662 if (ud->flags & UNIT_DIRECTORY_SPECIFIER_ID)
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200663 if (device_create_file(dev, &dev_attr_ud_specifier_id))
664 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665 if (ud->flags & UNIT_DIRECTORY_VERSION)
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200666 if (device_create_file(dev, &dev_attr_ud_version))
667 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668 if (ud->flags & UNIT_DIRECTORY_VENDOR_ID) {
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200669 if (device_create_file(dev, &dev_attr_ud_vendor_id))
670 goto fail;
671 if (ud->vendor_name_kv &&
672 device_create_file(dev, &dev_attr_ud_vendor_name_kv))
673 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675 if (ud->flags & UNIT_DIRECTORY_MODEL_ID) {
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200676 if (device_create_file(dev, &dev_attr_ud_model_id))
677 goto fail;
678 if (ud->model_name_kv &&
679 device_create_file(dev, &dev_attr_ud_model_name_kv))
680 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681 }
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200682 return;
683fail:
Stefan Richter9be51c52007-03-30 19:21:05 +0200684 HPSB_ERR("Failed to add sysfs attribute");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685}
686
687
688static int nodemgr_bus_match(struct device * dev, struct device_driver * drv)
689{
Stefan Richterd41bba22006-11-22 21:28:19 +0100690 struct hpsb_protocol_driver *driver;
691 struct unit_directory *ud;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692 struct ieee1394_device_id *id;
693
694 /* We only match unit directories */
695 if (dev->platform_data != &nodemgr_ud_platform_data)
696 return 0;
697
698 ud = container_of(dev, struct unit_directory, device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699 if (ud->ne->in_limbo || ud->ignore_driver)
700 return 0;
701
Stefan Richter8252bbb2006-11-22 21:09:42 +0100702 /* We only match drivers of type hpsb_protocol_driver */
703 if (drv == &nodemgr_mid_layer_driver)
704 return 0;
705
706 driver = container_of(drv, struct hpsb_protocol_driver, driver);
Stefan Richterd2ace292008-02-18 21:11:07 +0100707 id = driver->id_table;
708 if (!id)
709 return 0;
710
711 for (; id->match_flags != 0; id++) {
Stefan Richterd41bba22006-11-22 21:28:19 +0100712 if ((id->match_flags & IEEE1394_MATCH_VENDOR_ID) &&
713 id->vendor_id != ud->vendor_id)
714 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715
Stefan Richterd41bba22006-11-22 21:28:19 +0100716 if ((id->match_flags & IEEE1394_MATCH_MODEL_ID) &&
717 id->model_id != ud->model_id)
718 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719
Stefan Richterd41bba22006-11-22 21:28:19 +0100720 if ((id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) &&
721 id->specifier_id != ud->specifier_id)
722 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723
Stefan Richterd41bba22006-11-22 21:28:19 +0100724 if ((id->match_flags & IEEE1394_MATCH_VERSION) &&
725 id->version != ud->version)
726 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727
728 return 1;
Stefan Richterd41bba22006-11-22 21:28:19 +0100729 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730
731 return 0;
732}
733
734
Stefan Richterb07375b2006-10-22 16:16:27 +0200735static DEFINE_MUTEX(nodemgr_serialize_remove_uds);
736
Dave Young73cf6022008-01-22 13:56:32 +0800737static int __match_ne(struct device *dev, void *data)
738{
739 struct unit_directory *ud;
740 struct node_entry *ne = (struct node_entry *)data;
741
742 ud = container_of(dev, struct unit_directory, unit_dev);
743 return ud->ne == ne;
744}
745
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746static void nodemgr_remove_uds(struct node_entry *ne)
747{
Kay Sieversdd7f2922007-05-25 11:50:53 +0200748 struct device *dev;
Dave Young73cf6022008-01-22 13:56:32 +0800749 struct unit_directory *ud;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750
Dave Young73cf6022008-01-22 13:56:32 +0800751 /* Use class_find device to iterate the devices. Since this code
752 * may be called from other contexts besides the knodemgrds,
753 * protect it by nodemgr_serialize_remove_uds.
Stefan Richterb07375b2006-10-22 16:16:27 +0200754 */
Stefan Richterb07375b2006-10-22 16:16:27 +0200755 mutex_lock(&nodemgr_serialize_remove_uds);
Stefan Richter1e4f7bc2006-12-02 22:23:34 +0100756 for (;;) {
Dave Young73cf6022008-01-22 13:56:32 +0800757 dev = class_find_device(&nodemgr_ud_class, ne, __match_ne);
758 if (!dev)
Stefan Richter1e4f7bc2006-12-02 22:23:34 +0100759 break;
Dave Young73cf6022008-01-22 13:56:32 +0800760 ud = container_of(dev, struct unit_directory, unit_dev);
761 put_device(dev);
Kay Sieversdd7f2922007-05-25 11:50:53 +0200762 device_unregister(&ud->unit_dev);
Stefan Richter1e4f7bc2006-12-02 22:23:34 +0100763 device_unregister(&ud->device);
Stefan Richterb07375b2006-10-22 16:16:27 +0200764 }
Stefan Richterb07375b2006-10-22 16:16:27 +0200765 mutex_unlock(&nodemgr_serialize_remove_uds);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766}
767
768
769static void nodemgr_remove_ne(struct node_entry *ne)
770{
Stefan Richtercec1a312006-11-18 23:16:11 +0100771 struct device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772
773 dev = get_device(&ne->device);
774 if (!dev)
775 return;
776
777 HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
778 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779 nodemgr_remove_uds(ne);
780
Kay Sieversdd7f2922007-05-25 11:50:53 +0200781 device_unregister(&ne->node_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782 device_unregister(dev);
783
784 put_device(dev);
785}
786
gregkh@suse.de643603222005-03-25 11:45:31 -0800787static int __nodemgr_remove_host_dev(struct device *dev, void *data)
788{
Kay Sieversdd7f2922007-05-25 11:50:53 +0200789 if (dev->bus == &ieee1394_bus_type)
790 nodemgr_remove_ne(container_of(dev, struct node_entry,
791 device));
gregkh@suse.de643603222005-03-25 11:45:31 -0800792 return 0;
793}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794
795static void nodemgr_remove_host_dev(struct device *dev)
796{
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200797 WARN_ON(device_for_each_child(dev, NULL, __nodemgr_remove_host_dev));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798 sysfs_remove_link(&dev->kobj, "irm_id");
799 sysfs_remove_link(&dev->kobj, "busmgr_id");
800 sysfs_remove_link(&dev->kobj, "host_id");
801}
802
803
804static void nodemgr_update_bus_options(struct node_entry *ne)
805{
806#ifdef CONFIG_IEEE1394_VERBOSEDEBUG
807 static const u16 mr[] = { 4, 64, 1024, 0};
808#endif
809 quadlet_t busoptions = be32_to_cpu(ne->csr->bus_info_data[2]);
810
Stefan Richterd41bba22006-11-22 21:28:19 +0100811 ne->busopt.irmc = (busoptions >> 31) & 1;
812 ne->busopt.cmc = (busoptions >> 30) & 1;
813 ne->busopt.isc = (busoptions >> 29) & 1;
814 ne->busopt.bmc = (busoptions >> 28) & 1;
815 ne->busopt.pmc = (busoptions >> 27) & 1;
816 ne->busopt.cyc_clk_acc = (busoptions >> 16) & 0xff;
817 ne->busopt.max_rec = 1 << (((busoptions >> 12) & 0xf) + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818 ne->busopt.max_rom = (busoptions >> 8) & 0x3;
Stefan Richterd41bba22006-11-22 21:28:19 +0100819 ne->busopt.generation = (busoptions >> 4) & 0xf;
820 ne->busopt.lnkspd = busoptions & 0x7;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821
822 HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d "
823 "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d",
824 busoptions, ne->busopt.irmc, ne->busopt.cmc,
825 ne->busopt.isc, ne->busopt.bmc, ne->busopt.pmc,
826 ne->busopt.cyc_clk_acc, ne->busopt.max_rec,
827 mr[ne->busopt.max_rom],
828 ne->busopt.generation, ne->busopt.lnkspd);
829}
830
831
832static struct node_entry *nodemgr_create_node(octlet_t guid, struct csr1212_csr *csr,
833 struct host_info *hi, nodeid_t nodeid,
834 unsigned int generation)
835{
836 struct hpsb_host *host = hi->host;
Stefan Richter85511582005-11-07 06:31:45 -0500837 struct node_entry *ne;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838
Stefan Richter85511582005-11-07 06:31:45 -0500839 ne = kzalloc(sizeof(*ne), GFP_KERNEL);
840 if (!ne)
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200841 goto fail_alloc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842
Stefan Richter85511582005-11-07 06:31:45 -0500843 ne->host = host;
844 ne->nodeid = nodeid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845 ne->generation = generation;
846 ne->needs_probe = 1;
847
Stefan Richter85511582005-11-07 06:31:45 -0500848 ne->guid = guid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849 ne->guid_vendor_id = (guid >> 40) & 0xffffff;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850 ne->csr = csr;
851
852 memcpy(&ne->device, &nodemgr_dev_template_ne,
853 sizeof(ne->device));
854 ne->device.parent = &host->device;
855 snprintf(ne->device.bus_id, BUS_ID_SIZE, "%016Lx",
856 (unsigned long long)(ne->guid));
857
Kay Sieversdd7f2922007-05-25 11:50:53 +0200858 ne->node_dev.parent = &ne->device;
859 ne->node_dev.class = &nodemgr_ne_class;
860 snprintf(ne->node_dev.bus_id, BUS_ID_SIZE, "%016Lx",
861 (unsigned long long)(ne->guid));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200863 if (device_register(&ne->device))
864 goto fail_devreg;
Kay Sieversdd7f2922007-05-25 11:50:53 +0200865 if (device_register(&ne->node_dev))
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200866 goto fail_classdevreg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867 get_device(&ne->device);
868
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869 nodemgr_create_ne_dev_files(ne);
870
871 nodemgr_update_bus_options(ne);
872
873 HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
874 (host->node_id == nodeid) ? "Host" : "Node",
875 NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
876
Stefan Richter85511582005-11-07 06:31:45 -0500877 return ne;
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200878
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200879fail_classdevreg:
880 device_unregister(&ne->device);
881fail_devreg:
882 kfree(ne);
883fail_alloc:
884 HPSB_ERR("Failed to create node ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
885 NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
886
887 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888}
889
Dave Young73cf6022008-01-22 13:56:32 +0800890static int __match_ne_guid(struct device *dev, void *data)
891{
892 struct node_entry *ne;
893 u64 *guid = (u64 *)data;
894
895 ne = container_of(dev, struct node_entry, node_dev);
896 return ne->guid == *guid;
897}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898
899static struct node_entry *find_entry_by_guid(u64 guid)
900{
Kay Sieversdd7f2922007-05-25 11:50:53 +0200901 struct device *dev;
Dave Young73cf6022008-01-22 13:56:32 +0800902 struct node_entry *ne;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700903
Dave Young73cf6022008-01-22 13:56:32 +0800904 dev = class_find_device(&nodemgr_ne_class, &guid, __match_ne_guid);
905 if (!dev)
906 return NULL;
907 ne = container_of(dev, struct node_entry, node_dev);
908 put_device(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700909
Dave Young73cf6022008-01-22 13:56:32 +0800910 return ne;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911}
912
Dave Young73cf6022008-01-22 13:56:32 +0800913struct match_nodeid_param {
914 struct hpsb_host *host;
915 nodeid_t nodeid;
916};
917
918static int __match_ne_nodeid(struct device *dev, void *data)
919{
920 int found = 0;
921 struct node_entry *ne;
922 struct match_nodeid_param *param = (struct match_nodeid_param *)data;
923
924 if (!dev)
925 goto ret;
926 ne = container_of(dev, struct node_entry, node_dev);
927 if (ne->host == param->host && ne->nodeid == param->nodeid)
928 found = 1;
929ret:
930 return found;
931}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700932
Stefan Richterb07375b2006-10-22 16:16:27 +0200933static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host,
934 nodeid_t nodeid)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700935{
Kay Sieversdd7f2922007-05-25 11:50:53 +0200936 struct device *dev;
Dave Young73cf6022008-01-22 13:56:32 +0800937 struct node_entry *ne;
938 struct match_nodeid_param param;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939
Dave Young73cf6022008-01-22 13:56:32 +0800940 param.host = host;
941 param.nodeid = nodeid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942
Dave Young73cf6022008-01-22 13:56:32 +0800943 dev = class_find_device(&nodemgr_ne_class, &param, __match_ne_nodeid);
944 if (!dev)
945 return NULL;
946 ne = container_of(dev, struct node_entry, node_dev);
947 put_device(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948
Dave Young73cf6022008-01-22 13:56:32 +0800949 return ne;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700950}
951
952
953static void nodemgr_register_device(struct node_entry *ne,
954 struct unit_directory *ud, struct device *parent)
955{
956 memcpy(&ud->device, &nodemgr_dev_template_ud,
957 sizeof(ud->device));
958
959 ud->device.parent = parent;
960
961 snprintf(ud->device.bus_id, BUS_ID_SIZE, "%s-%u",
962 ne->device.bus_id, ud->id);
963
Kay Sieversdd7f2922007-05-25 11:50:53 +0200964 ud->unit_dev.parent = &ud->device;
965 ud->unit_dev.class = &nodemgr_ud_class;
966 snprintf(ud->unit_dev.bus_id, BUS_ID_SIZE, "%s-%u",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700967 ne->device.bus_id, ud->id);
968
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200969 if (device_register(&ud->device))
970 goto fail_devreg;
Kay Sieversdd7f2922007-05-25 11:50:53 +0200971 if (device_register(&ud->unit_dev))
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200972 goto fail_classdevreg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700973 get_device(&ud->device);
974
Linus Torvalds1da177e2005-04-16 15:20:36 -0700975 nodemgr_create_ud_dev_files(ud);
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200976
977 return;
978
Stefan Richterc1c9c7c2006-10-10 21:19:21 +0200979fail_classdevreg:
980 device_unregister(&ud->device);
981fail_devreg:
982 HPSB_ERR("Failed to create unit %s", ud->device.bus_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700983}
984
985
986/* This implementation currently only scans the config rom and its
987 * immediate unit directories looking for software_id and
988 * software_version entries, in order to get driver autoloading working. */
989static struct unit_directory *nodemgr_process_unit_directory
990 (struct host_info *hi, struct node_entry *ne, struct csr1212_keyval *ud_kv,
991 unsigned int *id, struct unit_directory *parent)
992{
993 struct unit_directory *ud;
994 struct unit_directory *ud_child = NULL;
995 struct csr1212_dentry *dentry;
996 struct csr1212_keyval *kv;
997 u8 last_key_id = 0;
998
Stefan Richter85511582005-11-07 06:31:45 -0500999 ud = kzalloc(sizeof(*ud), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000 if (!ud)
1001 goto unit_directory_error;
1002
Linus Torvalds1da177e2005-04-16 15:20:36 -07001003 ud->ne = ne;
1004 ud->ignore_driver = ignore_drivers;
Stefan Richtera52938f2007-05-27 13:11:47 +02001005 ud->address = ud_kv->offset + CSR1212_REGISTER_SPACE_BASE;
Stefan Richterd7794c82007-05-27 13:17:15 +02001006 ud->directory_id = ud->address & 0xffffff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001007 ud->ud_kv = ud_kv;
1008 ud->id = (*id)++;
1009
1010 csr1212_for_each_dir_entry(ne->csr, kv, ud_kv, dentry) {
1011 switch (kv->key.id) {
1012 case CSR1212_KV_ID_VENDOR:
1013 if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
1014 ud->vendor_id = kv->value.immediate;
1015 ud->flags |= UNIT_DIRECTORY_VENDOR_ID;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001016 }
1017 break;
1018
1019 case CSR1212_KV_ID_MODEL:
1020 ud->model_id = kv->value.immediate;
1021 ud->flags |= UNIT_DIRECTORY_MODEL_ID;
1022 break;
1023
1024 case CSR1212_KV_ID_SPECIFIER_ID:
1025 ud->specifier_id = kv->value.immediate;
1026 ud->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
1027 break;
1028
1029 case CSR1212_KV_ID_VERSION:
1030 ud->version = kv->value.immediate;
1031 ud->flags |= UNIT_DIRECTORY_VERSION;
1032 break;
1033
1034 case CSR1212_KV_ID_DESCRIPTOR:
1035 if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
1036 CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
1037 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
1038 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
1039 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
1040 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
1041 switch (last_key_id) {
1042 case CSR1212_KV_ID_VENDOR:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043 csr1212_keep_keyval(kv);
Stefan Richter17a19b72007-09-15 14:50:25 +02001044 ud->vendor_name_kv = kv;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001045 break;
1046
1047 case CSR1212_KV_ID_MODEL:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001048 csr1212_keep_keyval(kv);
Stefan Richter17a19b72007-09-15 14:50:25 +02001049 ud->model_name_kv = kv;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001050 break;
1051
1052 }
1053 } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */
1054 break;
1055
1056 case CSR1212_KV_ID_DEPENDENT_INFO:
1057 /* Logical Unit Number */
1058 if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
1059 if (ud->flags & UNIT_DIRECTORY_HAS_LUN) {
Eric Sesterhennbfe89d72006-10-29 23:13:40 +03001060 ud_child = kmemdup(ud, sizeof(*ud_child), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061 if (!ud_child)
1062 goto unit_directory_error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063 nodemgr_register_device(ne, ud_child, &ne->device);
1064 ud_child = NULL;
1065
1066 ud->id = (*id)++;
1067 }
1068 ud->lun = kv->value.immediate;
1069 ud->flags |= UNIT_DIRECTORY_HAS_LUN;
1070
1071 /* Logical Unit Directory */
1072 } else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) {
1073 /* This should really be done in SBP2 as this is
1074 * doing SBP2 specific parsing.
1075 */
1076
1077 /* first register the parent unit */
1078 ud->flags |= UNIT_DIRECTORY_HAS_LUN_DIRECTORY;
1079 if (ud->device.bus != &ieee1394_bus_type)
1080 nodemgr_register_device(ne, ud, &ne->device);
1081
1082 /* process the child unit */
1083 ud_child = nodemgr_process_unit_directory(hi, ne, kv, id, ud);
1084
1085 if (ud_child == NULL)
1086 break;
1087
Kay Sievers312c0042005-11-16 09:00:00 +01001088 /* inherit unspecified values, the driver core picks it up */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001089 if ((ud->flags & UNIT_DIRECTORY_MODEL_ID) &&
1090 !(ud_child->flags & UNIT_DIRECTORY_MODEL_ID))
1091 {
1092 ud_child->flags |= UNIT_DIRECTORY_MODEL_ID;
1093 ud_child->model_id = ud->model_id;
1094 }
1095 if ((ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) &&
1096 !(ud_child->flags & UNIT_DIRECTORY_SPECIFIER_ID))
1097 {
1098 ud_child->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
1099 ud_child->specifier_id = ud->specifier_id;
1100 }
1101 if ((ud->flags & UNIT_DIRECTORY_VERSION) &&
1102 !(ud_child->flags & UNIT_DIRECTORY_VERSION))
1103 {
1104 ud_child->flags |= UNIT_DIRECTORY_VERSION;
1105 ud_child->version = ud->version;
1106 }
1107
1108 /* register the child unit */
1109 ud_child->flags |= UNIT_DIRECTORY_LUN_DIRECTORY;
1110 nodemgr_register_device(ne, ud_child, &ud->device);
1111 }
1112
1113 break;
1114
Stefan Richterd7794c82007-05-27 13:17:15 +02001115 case CSR1212_KV_ID_DIRECTORY_ID:
1116 ud->directory_id = kv->value.immediate;
1117 break;
1118
Linus Torvalds1da177e2005-04-16 15:20:36 -07001119 default:
1120 break;
1121 }
1122 last_key_id = kv->key.id;
1123 }
1124
1125 /* do not process child units here and only if not already registered */
1126 if (!parent && ud->device.bus != &ieee1394_bus_type)
1127 nodemgr_register_device(ne, ud, &ne->device);
1128
1129 return ud;
1130
1131unit_directory_error:
Jody McIntyre616b8592005-05-16 21:54:01 -07001132 kfree(ud);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001133 return NULL;
1134}
1135
1136
1137static void nodemgr_process_root_directory(struct host_info *hi, struct node_entry *ne)
1138{
1139 unsigned int ud_id = 0;
1140 struct csr1212_dentry *dentry;
Stefan Richter638d5bb2007-09-15 14:45:53 +02001141 struct csr1212_keyval *kv, *vendor_name_kv = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001142 u8 last_key_id = 0;
1143
1144 ne->needs_probe = 0;
1145
1146 csr1212_for_each_dir_entry(ne->csr, kv, ne->csr->root_kv, dentry) {
1147 switch (kv->key.id) {
1148 case CSR1212_KV_ID_VENDOR:
1149 ne->vendor_id = kv->value.immediate;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001150 break;
1151
1152 case CSR1212_KV_ID_NODE_CAPABILITIES:
1153 ne->capabilities = kv->value.immediate;
1154 break;
1155
1156 case CSR1212_KV_ID_UNIT:
1157 nodemgr_process_unit_directory(hi, ne, kv, &ud_id, NULL);
1158 break;
1159
1160 case CSR1212_KV_ID_DESCRIPTOR:
1161 if (last_key_id == CSR1212_KV_ID_VENDOR) {
1162 if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
1163 CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
1164 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
1165 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
1166 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
1167 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001168 csr1212_keep_keyval(kv);
Stefan Richter638d5bb2007-09-15 14:45:53 +02001169 vendor_name_kv = kv;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001170 }
1171 }
1172 break;
1173 }
1174 last_key_id = kv->key.id;
1175 }
1176
Stefan Richter93245472007-03-30 19:19:55 +02001177 if (ne->vendor_name_kv) {
Stefan Richter638d5bb2007-09-15 14:45:53 +02001178 kv = ne->vendor_name_kv;
1179 ne->vendor_name_kv = vendor_name_kv;
1180 csr1212_release_keyval(kv);
1181 } else if (vendor_name_kv) {
1182 ne->vendor_name_kv = vendor_name_kv;
1183 if (device_create_file(&ne->device,
1184 &dev_attr_ne_vendor_name_kv) != 0)
Stefan Richter9be51c52007-03-30 19:21:05 +02001185 HPSB_ERR("Failed to add sysfs attribute");
Stefan Richter93245472007-03-30 19:19:55 +02001186 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001187}
1188
1189#ifdef CONFIG_HOTPLUG
1190
Kay Sievers7eff2e72007-08-14 15:15:12 +02001191static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001192{
1193 struct unit_directory *ud;
Eric Rannaudbf624562007-03-30 22:23:12 -07001194 int retval = 0;
Olaf Hering9b19d852005-09-06 15:18:18 -07001195 /* ieee1394:venNmoNspNverN */
1196 char buf[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001197
Kay Sieversdd7f2922007-05-25 11:50:53 +02001198 if (!dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001199 return -ENODEV;
1200
Kay Sieversdd7f2922007-05-25 11:50:53 +02001201 ud = container_of(dev, struct unit_directory, unit_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001202
1203 if (ud->ne->in_limbo || ud->ignore_driver)
1204 return -ENODEV;
1205
1206#define PUT_ENVP(fmt,val) \
1207do { \
Kay Sievers7eff2e72007-08-14 15:15:12 +02001208 retval = add_uevent_var(env, fmt, val); \
Eric Rannaudbf624562007-03-30 22:23:12 -07001209 if (retval) \
1210 return retval; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001211} while (0)
1212
1213 PUT_ENVP("VENDOR_ID=%06x", ud->vendor_id);
1214 PUT_ENVP("MODEL_ID=%06x", ud->model_id);
1215 PUT_ENVP("GUID=%016Lx", (unsigned long long)ud->ne->guid);
1216 PUT_ENVP("SPECIFIER_ID=%06x", ud->specifier_id);
1217 PUT_ENVP("VERSION=%06x", ud->version);
Olaf Hering9b19d852005-09-06 15:18:18 -07001218 snprintf(buf, sizeof(buf), "ieee1394:ven%08Xmo%08Xsp%08Xver%08X",
1219 ud->vendor_id,
1220 ud->model_id,
1221 ud->specifier_id,
1222 ud->version);
1223 PUT_ENVP("MODALIAS=%s", buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224
1225#undef PUT_ENVP
1226
Linus Torvalds1da177e2005-04-16 15:20:36 -07001227 return 0;
1228}
1229
1230#else
1231
Kay Sievers7eff2e72007-08-14 15:15:12 +02001232static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001233{
1234 return -ENODEV;
1235}
1236
1237#endif /* CONFIG_HOTPLUG */
1238
1239
Ben Collinsed30c262006-11-23 13:59:48 -05001240int __hpsb_register_protocol(struct hpsb_protocol_driver *drv,
1241 struct module *owner)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242{
Ben Collinsed30c262006-11-23 13:59:48 -05001243 int error;
1244
1245 drv->driver.bus = &ieee1394_bus_type;
1246 drv->driver.owner = owner;
1247 drv->driver.name = drv->name;
1248
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249 /* This will cause a probe for devices */
Ben Collinsed30c262006-11-23 13:59:48 -05001250 error = driver_register(&drv->driver);
Stefan Richter7fdfc902006-10-21 01:23:56 +02001251 if (!error)
Ben Collinsed30c262006-11-23 13:59:48 -05001252 nodemgr_create_drv_files(drv);
Stefan Richter7fdfc902006-10-21 01:23:56 +02001253 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254}
1255
1256void hpsb_unregister_protocol(struct hpsb_protocol_driver *driver)
1257{
1258 nodemgr_remove_drv_files(driver);
1259 /* This will subsequently disconnect all devices that our driver
1260 * is attached to. */
1261 driver_unregister(&driver->driver);
1262}
1263
1264
1265/*
1266 * This function updates nodes that were present on the bus before the
1267 * reset and still are after the reset. The nodeid and the config rom
1268 * may have changed, and the drivers managing this device must be
1269 * informed that this device just went through a bus reset, to allow
1270 * the to take whatever actions required.
1271 */
1272static void nodemgr_update_node(struct node_entry *ne, struct csr1212_csr *csr,
1273 struct host_info *hi, nodeid_t nodeid,
1274 unsigned int generation)
1275{
1276 if (ne->nodeid != nodeid) {
1277 HPSB_DEBUG("Node changed: " NODE_BUS_FMT " -> " NODE_BUS_FMT,
1278 NODE_BUS_ARGS(ne->host, ne->nodeid),
1279 NODE_BUS_ARGS(ne->host, nodeid));
1280 ne->nodeid = nodeid;
1281 }
1282
1283 if (ne->busopt.generation != ((be32_to_cpu(csr->bus_info_data[2]) >> 4) & 0xf)) {
1284 kfree(ne->csr->private);
1285 csr1212_destroy_csr(ne->csr);
1286 ne->csr = csr;
1287
1288 /* If the node's configrom generation has changed, we
1289 * unregister all the unit directories. */
1290 nodemgr_remove_uds(ne);
1291
1292 nodemgr_update_bus_options(ne);
1293
1294 /* Mark the node as new, so it gets re-probed */
1295 ne->needs_probe = 1;
1296 } else {
1297 /* old cache is valid, so update its generation */
1298 struct nodemgr_csr_info *ci = ne->csr->private;
1299 ci->generation = generation;
1300 /* free the partially filled now unneeded new cache */
1301 kfree(csr->private);
1302 csr1212_destroy_csr(csr);
1303 }
1304
1305 if (ne->in_limbo)
1306 nodemgr_resume_ne(ne);
1307
1308 /* Mark the node current */
1309 ne->generation = generation;
1310}
1311
1312
1313
1314static void nodemgr_node_scan_one(struct host_info *hi,
1315 nodeid_t nodeid, int generation)
1316{
1317 struct hpsb_host *host = hi->host;
1318 struct node_entry *ne;
1319 octlet_t guid;
1320 struct csr1212_csr *csr;
1321 struct nodemgr_csr_info *ci;
Stefan Richterd7530a12006-07-03 00:58:01 +02001322 u8 *speed;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001323
Stefan Richter85511582005-11-07 06:31:45 -05001324 ci = kmalloc(sizeof(*ci), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001325 if (!ci)
1326 return;
1327
1328 ci->host = host;
1329 ci->nodeid = nodeid;
1330 ci->generation = generation;
Stefan Richterd7530a12006-07-03 00:58:01 +02001331
1332 /* Prepare for speed probe which occurs when reading the ROM */
1333 speed = &(host->speed[NODEID_TO_NODE(nodeid)]);
1334 if (*speed > host->csr.lnk_spd)
1335 *speed = host->csr.lnk_spd;
1336 ci->speed_unverified = *speed > IEEE1394_SPEED_100;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001337
1338 /* We need to detect when the ConfigROM's generation has changed,
1339 * so we only update the node's info when it needs to be. */
1340
1341 csr = csr1212_create_csr(&nodemgr_csr_ops, 5 * sizeof(quadlet_t), ci);
1342 if (!csr || csr1212_parse_csr(csr) != CSR1212_SUCCESS) {
1343 HPSB_ERR("Error parsing configrom for node " NODE_BUS_FMT,
1344 NODE_BUS_ARGS(host, nodeid));
1345 if (csr)
1346 csr1212_destroy_csr(csr);
1347 kfree(ci);
1348 return;
1349 }
1350
1351 if (csr->bus_info_data[1] != IEEE1394_BUSID_MAGIC) {
1352 /* This isn't a 1394 device, but we let it slide. There
1353 * was a report of a device with broken firmware which
1354 * reported '2394' instead of '1394', which is obviously a
1355 * mistake. One would hope that a non-1394 device never
1356 * gets connected to Firewire bus. If someone does, we
1357 * shouldn't be held responsible, so we'll allow it with a
1358 * warning. */
1359 HPSB_WARN("Node " NODE_BUS_FMT " has invalid busID magic [0x%08x]",
1360 NODE_BUS_ARGS(host, nodeid), csr->bus_info_data[1]);
1361 }
1362
1363 guid = ((u64)be32_to_cpu(csr->bus_info_data[3]) << 32) | be32_to_cpu(csr->bus_info_data[4]);
1364 ne = find_entry_by_guid(guid);
1365
1366 if (ne && ne->host != host && ne->in_limbo) {
1367 /* Must have moved this device from one host to another */
1368 nodemgr_remove_ne(ne);
1369 ne = NULL;
1370 }
1371
1372 if (!ne)
1373 nodemgr_create_node(guid, csr, hi, nodeid, generation);
1374 else
1375 nodemgr_update_node(ne, csr, hi, nodeid, generation);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001376}
1377
1378
1379static void nodemgr_node_scan(struct host_info *hi, int generation)
1380{
Stefan Richterd41bba22006-11-22 21:28:19 +01001381 int count;
1382 struct hpsb_host *host = hi->host;
1383 struct selfid *sid = (struct selfid *)host->topology_map;
1384 nodeid_t nodeid = LOCAL_BUS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001385
Stefan Richterd41bba22006-11-22 21:28:19 +01001386 /* Scan each node on the bus */
1387 for (count = host->selfid_count; count; count--, sid++) {
1388 if (sid->extended)
1389 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001390
Stefan Richterd41bba22006-11-22 21:28:19 +01001391 if (!sid->link_active) {
1392 nodeid++;
1393 continue;
1394 }
1395 nodemgr_node_scan_one(hi, nodeid++, generation);
1396 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001397}
1398
Dave Young73cf6022008-01-22 13:56:32 +08001399static int __nodemgr_driver_suspend(struct device *dev, void *data)
1400{
1401 struct unit_directory *ud;
1402 struct device_driver *drv;
1403 struct node_entry *ne = (struct node_entry *)data;
1404 int error;
1405
1406 ud = container_of(dev, struct unit_directory, unit_dev);
1407 if (ud->ne == ne) {
1408 drv = get_driver(ud->device.driver);
1409 if (drv) {
1410 error = 1; /* release if suspend is not implemented */
1411 if (drv->suspend) {
1412 down(&ud->device.sem);
1413 error = drv->suspend(&ud->device, PMSG_SUSPEND);
1414 up(&ud->device.sem);
1415 }
1416 if (error)
1417 device_release_driver(&ud->device);
1418 put_driver(drv);
1419 }
1420 }
1421
1422 return 0;
1423}
1424
1425static int __nodemgr_driver_resume(struct device *dev, void *data)
1426{
1427 struct unit_directory *ud;
1428 struct device_driver *drv;
1429 struct node_entry *ne = (struct node_entry *)data;
1430
1431 ud = container_of(dev, struct unit_directory, unit_dev);
1432 if (ud->ne == ne) {
1433 drv = get_driver(ud->device.driver);
1434 if (drv) {
1435 if (drv->resume) {
1436 down(&ud->device.sem);
1437 drv->resume(&ud->device);
1438 up(&ud->device.sem);
1439 }
1440 put_driver(drv);
1441 }
1442 }
1443
1444 return 0;
1445}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001446
1447static void nodemgr_suspend_ne(struct node_entry *ne)
1448{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001449 HPSB_DEBUG("Node suspended: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
Dave Young73cf6022008-01-22 13:56:32 +08001450 NODE_BUS_ARGS(ne->host, ne->nodeid),
1451 (unsigned long long)ne->guid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001452
1453 ne->in_limbo = 1;
Stefan Richterc1c9c7c2006-10-10 21:19:21 +02001454 WARN_ON(device_create_file(&ne->device, &dev_attr_ne_in_limbo));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001455
Dave Young73cf6022008-01-22 13:56:32 +08001456 class_for_each_device(&nodemgr_ud_class, ne, __nodemgr_driver_suspend);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001457}
1458
1459
1460static void nodemgr_resume_ne(struct node_entry *ne)
1461{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001462 ne->in_limbo = 0;
1463 device_remove_file(&ne->device, &dev_attr_ne_in_limbo);
1464
Dave Young73cf6022008-01-22 13:56:32 +08001465 class_for_each_device(&nodemgr_ud_class, ne, __nodemgr_driver_resume);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001466 HPSB_DEBUG("Node resumed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
1467 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
1468}
1469
Dave Young73cf6022008-01-22 13:56:32 +08001470static int __nodemgr_update_pdrv(struct device *dev, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001471{
Stefan Richtera0e857e2007-06-17 23:47:45 +02001472 struct unit_directory *ud;
1473 struct device_driver *drv;
1474 struct hpsb_protocol_driver *pdrv;
Dave Young73cf6022008-01-22 13:56:32 +08001475 struct node_entry *ne = (struct node_entry *)data;
Stefan Richtera0e857e2007-06-17 23:47:45 +02001476 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001477
Dave Young73cf6022008-01-22 13:56:32 +08001478 ud = container_of(dev, struct unit_directory, unit_dev);
1479 if (ud->ne == ne) {
Stefan Richtera0e857e2007-06-17 23:47:45 +02001480 drv = get_driver(ud->device.driver);
Dave Young73cf6022008-01-22 13:56:32 +08001481 if (drv) {
1482 error = 0;
1483 pdrv = container_of(drv, struct hpsb_protocol_driver,
1484 driver);
1485 if (pdrv->update) {
1486 down(&ud->device.sem);
1487 error = pdrv->update(ud);
1488 up(&ud->device.sem);
1489 }
1490 if (error)
1491 device_release_driver(&ud->device);
1492 put_driver(drv);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001493 }
1494 }
Dave Young73cf6022008-01-22 13:56:32 +08001495
1496 return 0;
1497}
1498
1499static void nodemgr_update_pdrv(struct node_entry *ne)
1500{
1501 class_for_each_device(&nodemgr_ud_class, ne, __nodemgr_update_pdrv);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001502}
1503
1504
Stefan Richter61c7f772005-12-05 16:28:59 -05001505/* Write the BROADCAST_CHANNEL as per IEEE1394a 8.3.2.3.11 and 8.4.2.3. This
1506 * seems like an optional service but in the end it is practically mandatory
1507 * as a consequence of these clauses.
1508 *
1509 * Note that we cannot do a broadcast write to all nodes at once because some
1510 * pre-1394a devices would hang. */
1511static void nodemgr_irm_write_bc(struct node_entry *ne, int generation)
1512{
1513 const u64 bc_addr = (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL);
1514 quadlet_t bc_remote, bc_local;
Stefan Richter7fdfc902006-10-21 01:23:56 +02001515 int error;
Stefan Richter61c7f772005-12-05 16:28:59 -05001516
1517 if (!ne->host->is_irm || ne->generation != generation ||
1518 ne->nodeid == ne->host->node_id)
1519 return;
1520
1521 bc_local = cpu_to_be32(ne->host->csr.broadcast_channel);
1522
1523 /* Check if the register is implemented and 1394a compliant. */
Stefan Richter7fdfc902006-10-21 01:23:56 +02001524 error = hpsb_read(ne->host, ne->nodeid, generation, bc_addr, &bc_remote,
1525 sizeof(bc_remote));
1526 if (!error && bc_remote & cpu_to_be32(0x80000000) &&
Stefan Richter61c7f772005-12-05 16:28:59 -05001527 bc_remote != bc_local)
1528 hpsb_node_write(ne, bc_addr, &bc_local, sizeof(bc_local));
1529}
1530
1531
Linus Torvalds1da177e2005-04-16 15:20:36 -07001532static void nodemgr_probe_ne(struct host_info *hi, struct node_entry *ne, int generation)
1533{
1534 struct device *dev;
1535
1536 if (ne->host != hi->host || ne->in_limbo)
1537 return;
1538
1539 dev = get_device(&ne->device);
1540 if (!dev)
1541 return;
1542
Stefan Richter61c7f772005-12-05 16:28:59 -05001543 nodemgr_irm_write_bc(ne, generation);
1544
Linus Torvalds1da177e2005-04-16 15:20:36 -07001545 /* If "needs_probe", then this is either a new or changed node we
1546 * rescan totally. If the generation matches for an existing node
1547 * (one that existed prior to the bus reset) we send update calls
1548 * down to the drivers. Otherwise, this is a dead node and we
1549 * suspend it. */
1550 if (ne->needs_probe)
1551 nodemgr_process_root_directory(hi, ne);
1552 else if (ne->generation == generation)
1553 nodemgr_update_pdrv(ne);
1554 else
1555 nodemgr_suspend_ne(ne);
1556
1557 put_device(dev);
1558}
1559
Dave Young73cf6022008-01-22 13:56:32 +08001560struct probe_param {
1561 struct host_info *hi;
1562 int generation;
1563};
1564
1565static int __nodemgr_node_probe(struct device *dev, void *data)
1566{
1567 struct probe_param *param = (struct probe_param *)data;
1568 struct node_entry *ne;
1569
1570 ne = container_of(dev, struct node_entry, node_dev);
1571 if (!ne->needs_probe)
1572 nodemgr_probe_ne(param->hi, ne, param->generation);
1573 if (ne->needs_probe)
1574 nodemgr_probe_ne(param->hi, ne, param->generation);
1575 return 0;
1576}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001577
1578static void nodemgr_node_probe(struct host_info *hi, int generation)
1579{
1580 struct hpsb_host *host = hi->host;
Dave Young73cf6022008-01-22 13:56:32 +08001581 struct probe_param param;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001582
Dave Young73cf6022008-01-22 13:56:32 +08001583 param.hi = hi;
1584 param.generation = generation;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001585 /* Do some processing of the nodes we've probed. This pulls them
1586 * into the sysfs layer if needed, and can result in processing of
1587 * unit-directories, or just updating the node and it's
Stefan Richter51c1d802005-12-12 23:03:19 -05001588 * unit-directories.
1589 *
1590 * Run updates before probes. Usually, updates are time-critical
1591 * while probes are time-consuming. (Well, those probes need some
1592 * improvement...) */
1593
Dave Young73cf6022008-01-22 13:56:32 +08001594 class_for_each_device(&nodemgr_ne_class, &param, __nodemgr_node_probe);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001595
1596 /* If we had a bus reset while we were scanning the bus, it is
1597 * possible that we did not probe all nodes. In that case, we
1598 * skip the clean up for now, since we could remove nodes that
Stefan Richterd2f119f2006-07-03 12:02:35 -04001599 * were still on the bus. Another bus scan is pending which will
1600 * do the clean up eventually.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001601 *
1602 * Now let's tell the bus to rescan our devices. This may seem
1603 * like overhead, but the driver-model core will only scan a
1604 * device for a driver when either the device is added, or when a
1605 * new driver is added. A bus reset is a good reason to rescan
1606 * devices that were there before. For example, an sbp2 device
1607 * may become available for login, if the host that held it was
1608 * just removed. */
1609
1610 if (generation == get_hpsb_generation(host))
Stefan Richter1f72cf52006-10-29 23:09:11 +01001611 if (bus_rescan_devices(&ieee1394_bus_type))
1612 HPSB_DEBUG("bus_rescan_devices had an error");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001613}
1614
Stefan Richter14c0fa22005-12-01 18:51:52 -05001615static int nodemgr_send_resume_packet(struct hpsb_host *host)
1616{
1617 struct hpsb_packet *packet;
Stefan Richter7fdfc902006-10-21 01:23:56 +02001618 int error = -ENOMEM;
Stefan Richter14c0fa22005-12-01 18:51:52 -05001619
1620 packet = hpsb_make_phypacket(host,
Stefan Richterd7758462005-12-01 18:51:56 -05001621 EXTPHYPACKET_TYPE_RESUME |
1622 NODEID_TO_NODE(host->node_id) << PHYPACKET_PORT_SHIFT);
Stefan Richter14c0fa22005-12-01 18:51:52 -05001623 if (packet) {
1624 packet->no_waiter = 1;
1625 packet->generation = get_hpsb_generation(host);
Stefan Richter7fdfc902006-10-21 01:23:56 +02001626 error = hpsb_send_packet(packet);
Stefan Richter14c0fa22005-12-01 18:51:52 -05001627 }
Stefan Richter7fdfc902006-10-21 01:23:56 +02001628 if (error)
Stefan Richter14c0fa22005-12-01 18:51:52 -05001629 HPSB_WARN("fw-host%d: Failed to broadcast resume packet",
1630 host->id);
Stefan Richter7fdfc902006-10-21 01:23:56 +02001631 return error;
Stefan Richter14c0fa22005-12-01 18:51:52 -05001632}
1633
Stefan Richter61c7f772005-12-05 16:28:59 -05001634/* Perform a few high-level IRM responsibilities. */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001635static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles)
1636{
1637 quadlet_t bc;
1638
1639 /* if irm_id == -1 then there is no IRM on this bus */
1640 if (!host->is_irm || host->irm_id == (nodeid_t)-1)
1641 return 1;
1642
Stefan Richter61c7f772005-12-05 16:28:59 -05001643 /* We are a 1394a-2000 compliant IRM. Set the validity bit. */
1644 host->csr.broadcast_channel |= 0x40000000;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001645
1646 /* If there is no bus manager then we should set the root node's
1647 * force_root bit to promote bus stability per the 1394
1648 * spec. (8.4.2.6) */
1649 if (host->busmgr_id == 0xffff && host->node_count > 1)
1650 {
1651 u16 root_node = host->node_count - 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001652
Jody McIntyre328699b2005-09-30 11:59:08 -07001653 /* get cycle master capability flag from root node */
1654 if (host->is_cycmst ||
1655 (!hpsb_read(host, LOCAL_BUS | root_node, get_hpsb_generation(host),
1656 (CSR_REGISTER_BASE + CSR_CONFIG_ROM + 2 * sizeof(quadlet_t)),
1657 &bc, sizeof(quadlet_t)) &&
1658 be32_to_cpu(bc) & 1 << CSR_CMC_SHIFT))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001659 hpsb_send_phy_config(host, root_node, -1);
1660 else {
1661 HPSB_DEBUG("The root node is not cycle master capable; "
1662 "selecting a new root node and resetting...");
1663
1664 if (cycles >= 5) {
1665 /* Oh screw it! Just leave the bus as it is */
1666 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1667 return 1;
1668 }
1669
1670 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1671 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1672
1673 return 0;
1674 }
1675 }
1676
Stefan Richter14c0fa22005-12-01 18:51:52 -05001677 /* Some devices suspend their ports while being connected to an inactive
1678 * host adapter, i.e. if connected before the low-level driver is
1679 * loaded. They become visible either when physically unplugged and
1680 * replugged, or when receiving a resume packet. Send one once. */
1681 if (!host->resume_packet_sent && !nodemgr_send_resume_packet(host))
1682 host->resume_packet_sent = 1;
1683
Linus Torvalds1da177e2005-04-16 15:20:36 -07001684 return 1;
1685}
1686
1687/* We need to ensure that if we are not the IRM, that the IRM node is capable of
1688 * everything we can do, otherwise issue a bus reset and try to become the IRM
1689 * ourselves. */
1690static int nodemgr_check_irm_capability(struct hpsb_host *host, int cycles)
1691{
1692 quadlet_t bc;
1693 int status;
1694
1695 if (hpsb_disable_irm || host->is_irm)
1696 return 1;
1697
1698 status = hpsb_read(host, LOCAL_BUS | (host->irm_id),
1699 get_hpsb_generation(host),
1700 (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL),
1701 &bc, sizeof(quadlet_t));
1702
1703 if (status < 0 || !(be32_to_cpu(bc) & 0x80000000)) {
1704 /* The current irm node does not have a valid BROADCAST_CHANNEL
1705 * register and we do, so reset the bus with force_root set */
1706 HPSB_DEBUG("Current remote IRM is not 1394a-2000 compliant, resetting...");
1707
1708 if (cycles >= 5) {
1709 /* Oh screw it! Just leave the bus as it is */
1710 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1711 return 1;
1712 }
1713
1714 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1715 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1716
1717 return 0;
1718 }
1719
1720 return 1;
1721}
1722
1723static int nodemgr_host_thread(void *__hi)
1724{
1725 struct host_info *hi = (struct host_info *)__hi;
1726 struct hpsb_host *host = hi->host;
Stefan Richterb7a71792006-10-06 19:49:52 +02001727 unsigned int g, generation = 0;
Stefan Richterd2f119f2006-07-03 12:02:35 -04001728 int i, reset_cycles = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001729
Rafael J. Wysocki83144182007-07-17 04:03:35 -07001730 set_freezable();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001731 /* Setup our device-model entries */
1732 nodemgr_create_host_dev_files(host);
1733
Stefan Richterd2f119f2006-07-03 12:02:35 -04001734 for (;;) {
1735 /* Sleep until next bus reset */
1736 set_current_state(TASK_INTERRUPTIBLE);
Stefan Richtera65421e2007-02-10 22:06:18 +01001737 if (get_hpsb_generation(host) == generation &&
1738 !kthread_should_stop())
Stefan Richterd2f119f2006-07-03 12:02:35 -04001739 schedule();
1740 __set_current_state(TASK_RUNNING);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001741
Stefan Richterd2f119f2006-07-03 12:02:35 -04001742 /* Thread may have been woken up to freeze or to exit */
1743 if (try_to_freeze())
1744 continue;
1745 if (kthread_should_stop())
1746 goto exit;
1747
Linus Torvalds1da177e2005-04-16 15:20:36 -07001748 /* Pause for 1/4 second in 1/16 second intervals,
1749 * to make sure things settle down. */
Stefan Richterd2f119f2006-07-03 12:02:35 -04001750 g = get_hpsb_generation(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001751 for (i = 0; i < 4 ; i++) {
Satyam Sharma69e2b602007-08-15 20:05:38 +05301752 msleep_interruptible(63);
1753 if (kthread_should_stop())
Stefan Richtera0e857e2007-06-17 23:47:45 +02001754 goto exit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001755
1756 /* Now get the generation in which the node ID's we collect
1757 * are valid. During the bus scan we will use this generation
1758 * for the read transactions, so that if another reset occurs
1759 * during the scan the transactions will fail instead of
1760 * returning bogus data. */
1761 generation = get_hpsb_generation(host);
1762
1763 /* If we get a reset before we are done waiting, then
Michael Opdenacker59c51592007-05-09 08:57:56 +02001764 * start the waiting over again */
Stefan Richterd2f119f2006-07-03 12:02:35 -04001765 if (generation != g)
1766 g = generation, i = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001767 }
1768
Jody McIntyre328699b2005-09-30 11:59:08 -07001769 if (!nodemgr_check_irm_capability(host, reset_cycles) ||
1770 !nodemgr_do_irm_duties(host, reset_cycles)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001771 reset_cycles++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001772 continue;
1773 }
Jody McIntyre328699b2005-09-30 11:59:08 -07001774 reset_cycles = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001775
1776 /* Scan our nodes to get the bus options and create node
1777 * entries. This does not do the sysfs stuff, since that
Kay Sievers312c0042005-11-16 09:00:00 +01001778 * would trigger uevents and such, which is a bad idea at
1779 * this point. */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001780 nodemgr_node_scan(hi, generation);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001781
1782 /* This actually does the full probe, with sysfs
1783 * registration. */
1784 nodemgr_node_probe(hi, generation);
1785
1786 /* Update some of our sysfs symlinks */
1787 nodemgr_update_host_dev_links(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001788 }
Stefan Richterd2f119f2006-07-03 12:02:35 -04001789exit:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001790 HPSB_VERBOSE("NodeMgr: Exiting thread");
Stefan Richterd2f119f2006-07-03 12:02:35 -04001791 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001792}
1793
Dave Young73cf6022008-01-22 13:56:32 +08001794struct host_iter_param {
1795 void *data;
1796 int (*cb)(struct hpsb_host *, void *);
1797};
1798
1799static int __nodemgr_for_each_host(struct device *dev, void *data)
1800{
1801 struct hpsb_host *host;
1802 struct host_iter_param *hip = (struct host_iter_param *)data;
1803 int error = 0;
1804
1805 host = container_of(dev, struct hpsb_host, host_dev);
1806 error = hip->cb(host, hip->data);
1807
1808 return error;
1809}
Stefan Richterafd65462007-03-05 03:06:23 +01001810/**
1811 * nodemgr_for_each_host - call a function for each IEEE 1394 host
1812 * @data: an address to supply to the callback
1813 * @cb: function to call for each host
1814 *
1815 * Iterate the hosts, calling a given function with supplied data for each host.
1816 * If the callback fails on a host, i.e. if it returns a non-zero value, the
1817 * iteration is stopped.
1818 *
1819 * Return value: 0 on success, non-zero on failure (same as returned by last run
1820 * of the callback).
1821 */
1822int nodemgr_for_each_host(void *data, int (*cb)(struct hpsb_host *, void *))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001823{
Dave Young73cf6022008-01-22 13:56:32 +08001824 struct host_iter_param hip;
1825 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001826
Dave Young73cf6022008-01-22 13:56:32 +08001827 hip.cb = cb;
1828 hip.data = data;
1829 error = class_for_each_device(&hpsb_host_class, &hip,
1830 __nodemgr_for_each_host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001831
1832 return error;
1833}
1834
Stefan Richteref815332007-03-05 03:05:32 +01001835/* The following two convenience functions use a struct node_entry
Linus Torvalds1da177e2005-04-16 15:20:36 -07001836 * for addressing a node on the bus. They are intended for use by any
1837 * process context, not just the nodemgr thread, so we need to be a
1838 * little careful when reading out the node ID and generation. The
1839 * thing that can go wrong is that we get the node ID, then a bus
1840 * reset occurs, and then we read the generation. The node ID is
1841 * possibly invalid, but the generation is current, and we end up
1842 * sending a packet to a the wrong node.
1843 *
1844 * The solution is to make sure we read the generation first, so that
1845 * if a reset occurs in the process, we end up with a stale generation
1846 * and the transactions will fail instead of silently using wrong node
1847 * ID's.
1848 */
1849
Stefan Richterafd65462007-03-05 03:06:23 +01001850/**
1851 * hpsb_node_fill_packet - fill some destination information into a packet
1852 * @ne: destination node
1853 * @packet: packet to fill in
1854 *
1855 * This will fill in the given, pre-initialised hpsb_packet with the current
1856 * information from the node entry (host, node ID, bus generation number).
1857 */
1858void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *packet)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001859{
Stefan Richterafd65462007-03-05 03:06:23 +01001860 packet->host = ne->host;
1861 packet->generation = ne->generation;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001862 barrier();
Stefan Richterafd65462007-03-05 03:06:23 +01001863 packet->node_id = ne->nodeid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001864}
1865
1866int hpsb_node_write(struct node_entry *ne, u64 addr,
1867 quadlet_t *buffer, size_t length)
1868{
1869 unsigned int generation = ne->generation;
1870
1871 barrier();
1872 return hpsb_write(ne->host, ne->nodeid, generation,
1873 addr, buffer, length);
1874}
1875
1876static void nodemgr_add_host(struct hpsb_host *host)
1877{
1878 struct host_info *hi;
1879
1880 hi = hpsb_create_hostinfo(&nodemgr_highlevel, host, sizeof(*hi));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001881 if (!hi) {
Stefan Richterd2f119f2006-07-03 12:02:35 -04001882 HPSB_ERR("NodeMgr: out of memory in add host");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001883 return;
1884 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001885 hi->host = host;
Stefan Richterd2f119f2006-07-03 12:02:35 -04001886 hi->thread = kthread_run(nodemgr_host_thread, hi, "knodemgrd_%d",
1887 host->id);
1888 if (IS_ERR(hi->thread)) {
1889 HPSB_ERR("NodeMgr: cannot start thread for host %d", host->id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001890 hpsb_destroy_hostinfo(&nodemgr_highlevel, host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001891 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001892}
1893
1894static void nodemgr_host_reset(struct hpsb_host *host)
1895{
1896 struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1897
Stefan Richterd2f119f2006-07-03 12:02:35 -04001898 if (hi) {
1899 HPSB_VERBOSE("NodeMgr: Processing reset for host %d", host->id);
1900 wake_up_process(hi->thread);
1901 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001902}
1903
1904static void nodemgr_remove_host(struct hpsb_host *host)
1905{
1906 struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1907
1908 if (hi) {
Stefan Richterd2f119f2006-07-03 12:02:35 -04001909 kthread_stop(hi->thread);
1910 nodemgr_remove_host_dev(&host->device);
1911 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001912}
1913
1914static struct hpsb_highlevel nodemgr_highlevel = {
1915 .name = "Node manager",
1916 .add_host = nodemgr_add_host,
1917 .host_reset = nodemgr_host_reset,
1918 .remove_host = nodemgr_remove_host,
1919};
1920
1921int init_ieee1394_nodemgr(void)
1922{
Stefan Richter7fdfc902006-10-21 01:23:56 +02001923 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001924
Stefan Richter7fdfc902006-10-21 01:23:56 +02001925 error = class_register(&nodemgr_ne_class);
1926 if (error)
Stefan Richter91efa462007-02-06 02:34:45 +01001927 goto fail_ne;
Stefan Richter7fdfc902006-10-21 01:23:56 +02001928 error = class_register(&nodemgr_ud_class);
Stefan Richter91efa462007-02-06 02:34:45 +01001929 if (error)
1930 goto fail_ud;
Stefan Richter8252bbb2006-11-22 21:09:42 +01001931 error = driver_register(&nodemgr_mid_layer_driver);
Stefan Richter91efa462007-02-06 02:34:45 +01001932 if (error)
1933 goto fail_ml;
1934 /* This driver is not used if nodemgr is off (disable_nodemgr=1). */
1935 nodemgr_dev_template_host.driver = &nodemgr_mid_layer_driver;
1936
Linus Torvalds1da177e2005-04-16 15:20:36 -07001937 hpsb_register_highlevel(&nodemgr_highlevel);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001938 return 0;
Stefan Richter91efa462007-02-06 02:34:45 +01001939
1940fail_ml:
1941 class_unregister(&nodemgr_ud_class);
1942fail_ud:
1943 class_unregister(&nodemgr_ne_class);
1944fail_ne:
1945 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001946}
1947
1948void cleanup_ieee1394_nodemgr(void)
1949{
Stefan Richterd41bba22006-11-22 21:28:19 +01001950 hpsb_unregister_highlevel(&nodemgr_highlevel);
Stefan Richter91efa462007-02-06 02:34:45 +01001951 driver_unregister(&nodemgr_mid_layer_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001952 class_unregister(&nodemgr_ud_class);
1953 class_unregister(&nodemgr_ne_class);
1954}