Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 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 | |
| 11 | #include <linux/kernel.h> |
| 12 | #include <linux/config.h> |
| 13 | #include <linux/list.h> |
| 14 | #include <linux/slab.h> |
| 15 | #include <linux/smp_lock.h> |
| 16 | #include <linux/interrupt.h> |
| 17 | #include <linux/kmod.h> |
| 18 | #include <linux/completion.h> |
| 19 | #include <linux/delay.h> |
| 20 | #include <linux/pci.h> |
| 21 | #include <linux/moduleparam.h> |
| 22 | #include <asm/atomic.h> |
| 23 | |
| 24 | #include "ieee1394_types.h" |
| 25 | #include "ieee1394.h" |
| 26 | #include "ieee1394_core.h" |
| 27 | #include "hosts.h" |
| 28 | #include "ieee1394_transactions.h" |
| 29 | #include "highlevel.h" |
| 30 | #include "csr.h" |
| 31 | #include "nodemgr.h" |
| 32 | |
Ben Collins | 1934b8b | 2005-07-09 20:01:23 -0400 | [diff] [blame] | 33 | static int ignore_drivers; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | module_param(ignore_drivers, int, 0444); |
| 35 | MODULE_PARM_DESC(ignore_drivers, "Disable automatic probing for drivers."); |
| 36 | |
| 37 | struct nodemgr_csr_info { |
| 38 | struct hpsb_host *host; |
| 39 | nodeid_t nodeid; |
| 40 | unsigned int generation; |
| 41 | }; |
| 42 | |
| 43 | |
| 44 | static char *nodemgr_find_oui_name(int oui) |
| 45 | { |
| 46 | #ifdef CONFIG_IEEE1394_OUI_DB |
| 47 | extern struct oui_list_struct { |
| 48 | int oui; |
| 49 | char *name; |
| 50 | } oui_list[]; |
| 51 | int i; |
| 52 | |
| 53 | for (i = 0; oui_list[i].name; i++) |
| 54 | if (oui_list[i].oui == oui) |
| 55 | return oui_list[i].name; |
| 56 | #endif |
| 57 | return NULL; |
| 58 | } |
| 59 | |
| 60 | |
| 61 | static int nodemgr_bus_read(struct csr1212_csr *csr, u64 addr, u16 length, |
| 62 | void *buffer, void *__ci) |
| 63 | { |
| 64 | struct nodemgr_csr_info *ci = (struct nodemgr_csr_info*)__ci; |
| 65 | int i, ret = 0; |
| 66 | |
| 67 | for (i = 0; i < 3; i++) { |
| 68 | ret = hpsb_read(ci->host, ci->nodeid, ci->generation, addr, |
| 69 | buffer, length); |
| 70 | if (!ret) |
| 71 | break; |
| 72 | |
| 73 | if (msleep_interruptible(334)) |
| 74 | return -EINTR; |
| 75 | } |
| 76 | |
| 77 | return ret; |
| 78 | } |
| 79 | |
| 80 | static int nodemgr_get_max_rom(quadlet_t *bus_info_data, void *__ci) |
| 81 | { |
| 82 | return (CSR1212_BE32_TO_CPU(bus_info_data[2]) >> 8) & 0x3; |
| 83 | } |
| 84 | |
| 85 | static struct csr1212_bus_ops nodemgr_csr_ops = { |
| 86 | .bus_read = nodemgr_bus_read, |
| 87 | .get_max_rom = nodemgr_get_max_rom |
| 88 | }; |
| 89 | |
| 90 | |
| 91 | /* |
| 92 | * Basically what we do here is start off retrieving the bus_info block. |
| 93 | * From there will fill in some info about the node, verify it is of IEEE |
| 94 | * 1394 type, and that the crc checks out ok. After that we start off with |
| 95 | * the root directory, and subdirectories. To do this, we retrieve the |
| 96 | * quadlet header for a directory, find out the length, and retrieve the |
| 97 | * complete directory entry (be it a leaf or a directory). We then process |
| 98 | * it and add the info to our structure for that particular node. |
| 99 | * |
| 100 | * We verify CRC's along the way for each directory/block/leaf. The entire |
| 101 | * node structure is generic, and simply stores the information in a way |
| 102 | * that's easy to parse by the protocol interface. |
| 103 | */ |
| 104 | |
| 105 | /* |
| 106 | * The nodemgr relies heavily on the Driver Model for device callbacks and |
| 107 | * driver/device mappings. The old nodemgr used to handle all this itself, |
| 108 | * but now we are much simpler because of the LDM. |
| 109 | */ |
| 110 | |
| 111 | static DECLARE_MUTEX(nodemgr_serialize); |
| 112 | |
| 113 | struct host_info { |
| 114 | struct hpsb_host *host; |
| 115 | struct list_head list; |
| 116 | struct completion exited; |
| 117 | struct semaphore reset_sem; |
| 118 | int pid; |
| 119 | char daemon_name[15]; |
| 120 | int kill_me; |
| 121 | }; |
| 122 | |
| 123 | static int nodemgr_bus_match(struct device * dev, struct device_driver * drv); |
| 124 | static int nodemgr_hotplug(struct class_device *cdev, char **envp, int num_envp, |
| 125 | char *buffer, int buffer_size); |
| 126 | static void nodemgr_resume_ne(struct node_entry *ne); |
| 127 | static void nodemgr_remove_ne(struct node_entry *ne); |
| 128 | static struct node_entry *find_entry_by_guid(u64 guid); |
| 129 | |
| 130 | struct bus_type ieee1394_bus_type = { |
| 131 | .name = "ieee1394", |
| 132 | .match = nodemgr_bus_match, |
| 133 | }; |
| 134 | |
| 135 | static void host_cls_release(struct class_device *class_dev) |
| 136 | { |
| 137 | put_device(&container_of((class_dev), struct hpsb_host, class_dev)->device); |
| 138 | } |
| 139 | |
| 140 | struct class hpsb_host_class = { |
| 141 | .name = "ieee1394_host", |
| 142 | .release = host_cls_release, |
| 143 | }; |
| 144 | |
| 145 | static void ne_cls_release(struct class_device *class_dev) |
| 146 | { |
| 147 | put_device(&container_of((class_dev), struct node_entry, class_dev)->device); |
| 148 | } |
| 149 | |
| 150 | static struct class nodemgr_ne_class = { |
| 151 | .name = "ieee1394_node", |
| 152 | .release = ne_cls_release, |
| 153 | }; |
| 154 | |
| 155 | static void ud_cls_release(struct class_device *class_dev) |
| 156 | { |
| 157 | put_device(&container_of((class_dev), struct unit_directory, class_dev)->device); |
| 158 | } |
| 159 | |
| 160 | /* The name here is only so that unit directory hotplug works with old |
| 161 | * style hotplug, which only ever did unit directories anyway. */ |
| 162 | static struct class nodemgr_ud_class = { |
| 163 | .name = "ieee1394", |
| 164 | .release = ud_cls_release, |
| 165 | .hotplug = nodemgr_hotplug, |
| 166 | }; |
| 167 | |
| 168 | static struct hpsb_highlevel nodemgr_highlevel; |
| 169 | |
| 170 | |
| 171 | static void nodemgr_release_ud(struct device *dev) |
| 172 | { |
| 173 | struct unit_directory *ud = container_of(dev, struct unit_directory, device); |
| 174 | |
| 175 | if (ud->vendor_name_kv) |
| 176 | csr1212_release_keyval(ud->vendor_name_kv); |
| 177 | if (ud->model_name_kv) |
| 178 | csr1212_release_keyval(ud->model_name_kv); |
| 179 | |
| 180 | kfree(ud); |
| 181 | } |
| 182 | |
| 183 | static void nodemgr_release_ne(struct device *dev) |
| 184 | { |
| 185 | struct node_entry *ne = container_of(dev, struct node_entry, device); |
| 186 | |
| 187 | if (ne->vendor_name_kv) |
| 188 | csr1212_release_keyval(ne->vendor_name_kv); |
| 189 | |
| 190 | kfree(ne); |
| 191 | } |
| 192 | |
| 193 | |
| 194 | static void nodemgr_release_host(struct device *dev) |
| 195 | { |
| 196 | struct hpsb_host *host = container_of(dev, struct hpsb_host, device); |
| 197 | |
| 198 | csr1212_destroy_csr(host->csr.rom); |
| 199 | |
| 200 | kfree(host); |
| 201 | } |
| 202 | |
| 203 | static int nodemgr_ud_platform_data; |
| 204 | |
| 205 | static struct device nodemgr_dev_template_ud = { |
| 206 | .bus = &ieee1394_bus_type, |
| 207 | .release = nodemgr_release_ud, |
| 208 | .platform_data = &nodemgr_ud_platform_data, |
| 209 | }; |
| 210 | |
| 211 | static struct device nodemgr_dev_template_ne = { |
| 212 | .bus = &ieee1394_bus_type, |
| 213 | .release = nodemgr_release_ne, |
| 214 | }; |
| 215 | |
| 216 | struct device nodemgr_dev_template_host = { |
| 217 | .bus = &ieee1394_bus_type, |
| 218 | .release = nodemgr_release_host, |
| 219 | }; |
| 220 | |
| 221 | |
| 222 | #define fw_attr(class, class_type, field, type, format_string) \ |
Yani Ioannou | e404e27 | 2005-05-17 06:42:58 -0400 | [diff] [blame] | 223 | static ssize_t fw_show_##class##_##field (struct device *dev, struct device_attribute *attr, char *buf)\ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | { \ |
| 225 | class_type *class; \ |
| 226 | class = container_of(dev, class_type, device); \ |
| 227 | return sprintf(buf, format_string, (type)class->field); \ |
| 228 | } \ |
| 229 | static struct device_attribute dev_attr_##class##_##field = { \ |
| 230 | .attr = {.name = __stringify(field), .mode = S_IRUGO }, \ |
| 231 | .show = fw_show_##class##_##field, \ |
| 232 | }; |
| 233 | |
| 234 | #define fw_attr_td(class, class_type, td_kv) \ |
Yani Ioannou | e404e27 | 2005-05-17 06:42:58 -0400 | [diff] [blame] | 235 | static ssize_t fw_show_##class##_##td_kv (struct device *dev, struct device_attribute *attr, char *buf)\ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | { \ |
| 237 | int len; \ |
| 238 | class_type *class = container_of(dev, class_type, device); \ |
| 239 | len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t); \ |
| 240 | memcpy(buf, \ |
| 241 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv), \ |
| 242 | len); \ |
| 243 | while ((buf + len - 1) == '\0') \ |
| 244 | len--; \ |
| 245 | buf[len++] = '\n'; \ |
| 246 | buf[len] = '\0'; \ |
| 247 | return len; \ |
| 248 | } \ |
| 249 | static struct device_attribute dev_attr_##class##_##td_kv = { \ |
| 250 | .attr = {.name = __stringify(td_kv), .mode = S_IRUGO }, \ |
| 251 | .show = fw_show_##class##_##td_kv, \ |
| 252 | }; |
| 253 | |
| 254 | |
| 255 | #define fw_drv_attr(field, type, format_string) \ |
| 256 | static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \ |
| 257 | { \ |
| 258 | struct hpsb_protocol_driver *driver; \ |
| 259 | driver = container_of(drv, struct hpsb_protocol_driver, driver); \ |
| 260 | return sprintf(buf, format_string, (type)driver->field);\ |
| 261 | } \ |
| 262 | static struct driver_attribute driver_attr_drv_##field = { \ |
| 263 | .attr = {.name = __stringify(field), .mode = S_IRUGO }, \ |
| 264 | .show = fw_drv_show_##field, \ |
| 265 | }; |
| 266 | |
| 267 | |
Yani Ioannou | e404e27 | 2005-05-17 06:42:58 -0400 | [diff] [blame] | 268 | static ssize_t fw_show_ne_bus_options(struct device *dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | { |
| 270 | struct node_entry *ne = container_of(dev, struct node_entry, device); |
| 271 | |
| 272 | return sprintf(buf, "IRMC(%d) CMC(%d) ISC(%d) BMC(%d) PMC(%d) GEN(%d) " |
| 273 | "LSPD(%d) MAX_REC(%d) MAX_ROM(%d) CYC_CLK_ACC(%d)\n", |
| 274 | ne->busopt.irmc, |
| 275 | ne->busopt.cmc, ne->busopt.isc, ne->busopt.bmc, |
| 276 | ne->busopt.pmc, ne->busopt.generation, ne->busopt.lnkspd, |
| 277 | ne->busopt.max_rec, |
| 278 | ne->busopt.max_rom, |
| 279 | ne->busopt.cyc_clk_acc); |
| 280 | } |
| 281 | static DEVICE_ATTR(bus_options,S_IRUGO,fw_show_ne_bus_options,NULL); |
| 282 | |
| 283 | |
Yani Ioannou | e404e27 | 2005-05-17 06:42:58 -0400 | [diff] [blame] | 284 | static ssize_t fw_show_ne_tlabels_free(struct device *dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | { |
| 286 | struct node_entry *ne = container_of(dev, struct node_entry, device); |
| 287 | return sprintf(buf, "%d\n", atomic_read(&ne->tpool->count.count) + 1); |
| 288 | } |
| 289 | static DEVICE_ATTR(tlabels_free,S_IRUGO,fw_show_ne_tlabels_free,NULL); |
| 290 | |
| 291 | |
Yani Ioannou | e404e27 | 2005-05-17 06:42:58 -0400 | [diff] [blame] | 292 | static ssize_t fw_show_ne_tlabels_allocations(struct device *dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | { |
| 294 | struct node_entry *ne = container_of(dev, struct node_entry, device); |
| 295 | return sprintf(buf, "%u\n", ne->tpool->allocations); |
| 296 | } |
| 297 | static DEVICE_ATTR(tlabels_allocations,S_IRUGO,fw_show_ne_tlabels_allocations,NULL); |
| 298 | |
| 299 | |
Yani Ioannou | e404e27 | 2005-05-17 06:42:58 -0400 | [diff] [blame] | 300 | static ssize_t fw_show_ne_tlabels_mask(struct device *dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | { |
| 302 | struct node_entry *ne = container_of(dev, struct node_entry, device); |
| 303 | #if (BITS_PER_LONG <= 32) |
| 304 | return sprintf(buf, "0x%08lx%08lx\n", ne->tpool->pool[0], ne->tpool->pool[1]); |
| 305 | #else |
| 306 | return sprintf(buf, "0x%016lx\n", ne->tpool->pool[0]); |
| 307 | #endif |
| 308 | } |
| 309 | static DEVICE_ATTR(tlabels_mask, S_IRUGO, fw_show_ne_tlabels_mask, NULL); |
| 310 | |
| 311 | |
Yani Ioannou | e404e27 | 2005-05-17 06:42:58 -0400 | [diff] [blame] | 312 | static ssize_t fw_set_ignore_driver(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | { |
| 314 | struct unit_directory *ud = container_of(dev, struct unit_directory, device); |
| 315 | int state = simple_strtoul(buf, NULL, 10); |
| 316 | |
| 317 | if (state == 1) { |
| 318 | down_write(&dev->bus->subsys.rwsem); |
| 319 | device_release_driver(dev); |
| 320 | ud->ignore_driver = 1; |
| 321 | up_write(&dev->bus->subsys.rwsem); |
| 322 | } else if (!state) |
| 323 | ud->ignore_driver = 0; |
| 324 | |
| 325 | return count; |
| 326 | } |
Yani Ioannou | e404e27 | 2005-05-17 06:42:58 -0400 | [diff] [blame] | 327 | static ssize_t fw_get_ignore_driver(struct device *dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | { |
| 329 | struct unit_directory *ud = container_of(dev, struct unit_directory, device); |
| 330 | |
| 331 | return sprintf(buf, "%d\n", ud->ignore_driver); |
| 332 | } |
| 333 | static DEVICE_ATTR(ignore_driver, S_IWUSR | S_IRUGO, fw_get_ignore_driver, fw_set_ignore_driver); |
| 334 | |
| 335 | |
| 336 | static ssize_t fw_set_destroy_node(struct bus_type *bus, const char *buf, size_t count) |
| 337 | { |
| 338 | struct node_entry *ne; |
| 339 | u64 guid = (u64)simple_strtoull(buf, NULL, 16); |
| 340 | |
| 341 | ne = find_entry_by_guid(guid); |
| 342 | |
| 343 | if (ne == NULL || !ne->in_limbo) |
| 344 | return -EINVAL; |
| 345 | |
| 346 | nodemgr_remove_ne(ne); |
| 347 | |
| 348 | return count; |
| 349 | } |
| 350 | static ssize_t fw_get_destroy_node(struct bus_type *bus, char *buf) |
| 351 | { |
| 352 | return sprintf(buf, "You can destroy in_limbo nodes by writing their GUID to this file\n"); |
| 353 | } |
| 354 | static BUS_ATTR(destroy_node, S_IWUSR | S_IRUGO, fw_get_destroy_node, fw_set_destroy_node); |
| 355 | |
| 356 | static int nodemgr_rescan_bus_thread(void *__unused) |
| 357 | { |
| 358 | /* No userlevel access needed */ |
| 359 | daemonize("kfwrescan"); |
| 360 | |
| 361 | bus_rescan_devices(&ieee1394_bus_type); |
| 362 | |
| 363 | return 0; |
| 364 | } |
| 365 | |
| 366 | static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf, size_t count) |
| 367 | { |
| 368 | int state = simple_strtoul(buf, NULL, 10); |
| 369 | |
| 370 | /* Don't wait for this, or care about errors. Root could do |
| 371 | * something stupid and spawn this a lot of times, but that's |
| 372 | * root's fault. */ |
| 373 | if (state == 1) |
| 374 | kernel_thread(nodemgr_rescan_bus_thread, NULL, CLONE_KERNEL); |
| 375 | |
| 376 | return count; |
| 377 | } |
| 378 | static ssize_t fw_get_rescan(struct bus_type *bus, char *buf) |
| 379 | { |
| 380 | return sprintf(buf, "You can force a rescan of the bus for " |
| 381 | "drivers by writing a 1 to this file\n"); |
| 382 | } |
| 383 | static BUS_ATTR(rescan, S_IWUSR | S_IRUGO, fw_get_rescan, fw_set_rescan); |
| 384 | |
| 385 | |
| 386 | static ssize_t fw_set_ignore_drivers(struct bus_type *bus, const char *buf, size_t count) |
| 387 | { |
| 388 | int state = simple_strtoul(buf, NULL, 10); |
| 389 | |
| 390 | if (state == 1) |
| 391 | ignore_drivers = 1; |
| 392 | else if (!state) |
| 393 | ignore_drivers = 0; |
| 394 | |
| 395 | return count; |
| 396 | } |
| 397 | static ssize_t fw_get_ignore_drivers(struct bus_type *bus, char *buf) |
| 398 | { |
| 399 | return sprintf(buf, "%d\n", ignore_drivers); |
| 400 | } |
| 401 | static BUS_ATTR(ignore_drivers, S_IWUSR | S_IRUGO, fw_get_ignore_drivers, fw_set_ignore_drivers); |
| 402 | |
| 403 | |
| 404 | struct bus_attribute *const fw_bus_attrs[] = { |
| 405 | &bus_attr_destroy_node, |
| 406 | &bus_attr_rescan, |
| 407 | &bus_attr_ignore_drivers, |
| 408 | NULL |
| 409 | }; |
| 410 | |
| 411 | |
| 412 | fw_attr(ne, struct node_entry, capabilities, unsigned int, "0x%06x\n") |
| 413 | fw_attr(ne, struct node_entry, nodeid, unsigned int, "0x%04x\n") |
| 414 | |
| 415 | fw_attr(ne, struct node_entry, vendor_id, unsigned int, "0x%06x\n") |
| 416 | fw_attr_td(ne, struct node_entry, vendor_name_kv) |
| 417 | fw_attr(ne, struct node_entry, vendor_oui, const char *, "%s\n") |
| 418 | |
| 419 | fw_attr(ne, struct node_entry, guid, unsigned long long, "0x%016Lx\n") |
| 420 | fw_attr(ne, struct node_entry, guid_vendor_id, unsigned int, "0x%06x\n") |
| 421 | fw_attr(ne, struct node_entry, guid_vendor_oui, const char *, "%s\n") |
| 422 | fw_attr(ne, struct node_entry, in_limbo, int, "%d\n"); |
| 423 | |
| 424 | static struct device_attribute *const fw_ne_attrs[] = { |
| 425 | &dev_attr_ne_guid, |
| 426 | &dev_attr_ne_guid_vendor_id, |
| 427 | &dev_attr_ne_capabilities, |
| 428 | &dev_attr_ne_vendor_id, |
| 429 | &dev_attr_ne_nodeid, |
| 430 | &dev_attr_bus_options, |
| 431 | &dev_attr_tlabels_free, |
| 432 | &dev_attr_tlabels_allocations, |
| 433 | &dev_attr_tlabels_mask, |
| 434 | }; |
| 435 | |
| 436 | |
| 437 | |
| 438 | fw_attr(ud, struct unit_directory, address, unsigned long long, "0x%016Lx\n") |
| 439 | fw_attr(ud, struct unit_directory, length, int, "%d\n") |
| 440 | /* These are all dependent on the value being provided */ |
| 441 | fw_attr(ud, struct unit_directory, vendor_id, unsigned int, "0x%06x\n") |
| 442 | fw_attr(ud, struct unit_directory, model_id, unsigned int, "0x%06x\n") |
| 443 | fw_attr(ud, struct unit_directory, specifier_id, unsigned int, "0x%06x\n") |
| 444 | fw_attr(ud, struct unit_directory, version, unsigned int, "0x%06x\n") |
| 445 | fw_attr_td(ud, struct unit_directory, vendor_name_kv) |
| 446 | fw_attr(ud, struct unit_directory, vendor_oui, const char *, "%s\n") |
| 447 | fw_attr_td(ud, struct unit_directory, model_name_kv) |
| 448 | |
| 449 | static struct device_attribute *const fw_ud_attrs[] = { |
| 450 | &dev_attr_ud_address, |
| 451 | &dev_attr_ud_length, |
| 452 | &dev_attr_ignore_driver, |
| 453 | }; |
| 454 | |
| 455 | |
| 456 | fw_attr(host, struct hpsb_host, node_count, int, "%d\n") |
| 457 | fw_attr(host, struct hpsb_host, selfid_count, int, "%d\n") |
| 458 | fw_attr(host, struct hpsb_host, nodes_active, int, "%d\n") |
| 459 | fw_attr(host, struct hpsb_host, in_bus_reset, int, "%d\n") |
| 460 | fw_attr(host, struct hpsb_host, is_root, int, "%d\n") |
| 461 | fw_attr(host, struct hpsb_host, is_cycmst, int, "%d\n") |
| 462 | fw_attr(host, struct hpsb_host, is_irm, int, "%d\n") |
| 463 | fw_attr(host, struct hpsb_host, is_busmgr, int, "%d\n") |
| 464 | |
| 465 | static struct device_attribute *const fw_host_attrs[] = { |
| 466 | &dev_attr_host_node_count, |
| 467 | &dev_attr_host_selfid_count, |
| 468 | &dev_attr_host_nodes_active, |
| 469 | &dev_attr_host_in_bus_reset, |
| 470 | &dev_attr_host_is_root, |
| 471 | &dev_attr_host_is_cycmst, |
| 472 | &dev_attr_host_is_irm, |
| 473 | &dev_attr_host_is_busmgr, |
| 474 | }; |
| 475 | |
| 476 | |
| 477 | static ssize_t fw_show_drv_device_ids(struct device_driver *drv, char *buf) |
| 478 | { |
| 479 | struct hpsb_protocol_driver *driver; |
| 480 | struct ieee1394_device_id *id; |
| 481 | int length = 0; |
| 482 | char *scratch = buf; |
| 483 | |
| 484 | driver = container_of(drv, struct hpsb_protocol_driver, driver); |
| 485 | |
| 486 | for (id = driver->id_table; id->match_flags != 0; id++) { |
| 487 | int need_coma = 0; |
| 488 | |
| 489 | if (id->match_flags & IEEE1394_MATCH_VENDOR_ID) { |
| 490 | length += sprintf(scratch, "vendor_id=0x%06x", id->vendor_id); |
| 491 | scratch = buf + length; |
| 492 | need_coma++; |
| 493 | } |
| 494 | |
| 495 | if (id->match_flags & IEEE1394_MATCH_MODEL_ID) { |
| 496 | length += sprintf(scratch, "%smodel_id=0x%06x", |
| 497 | need_coma++ ? "," : "", |
| 498 | id->model_id); |
| 499 | scratch = buf + length; |
| 500 | } |
| 501 | |
| 502 | if (id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) { |
| 503 | length += sprintf(scratch, "%sspecifier_id=0x%06x", |
| 504 | need_coma++ ? "," : "", |
| 505 | id->specifier_id); |
| 506 | scratch = buf + length; |
| 507 | } |
| 508 | |
| 509 | if (id->match_flags & IEEE1394_MATCH_VERSION) { |
| 510 | length += sprintf(scratch, "%sversion=0x%06x", |
| 511 | need_coma++ ? "," : "", |
| 512 | id->version); |
| 513 | scratch = buf + length; |
| 514 | } |
| 515 | |
| 516 | if (need_coma) { |
| 517 | *scratch++ = '\n'; |
| 518 | length++; |
| 519 | } |
| 520 | } |
| 521 | |
| 522 | return length; |
| 523 | } |
| 524 | static DRIVER_ATTR(device_ids,S_IRUGO,fw_show_drv_device_ids,NULL); |
| 525 | |
| 526 | |
| 527 | fw_drv_attr(name, const char *, "%s\n") |
| 528 | |
| 529 | static struct driver_attribute *const fw_drv_attrs[] = { |
| 530 | &driver_attr_drv_name, |
| 531 | &driver_attr_device_ids, |
| 532 | }; |
| 533 | |
| 534 | |
| 535 | static void nodemgr_create_drv_files(struct hpsb_protocol_driver *driver) |
| 536 | { |
| 537 | struct device_driver *drv = &driver->driver; |
| 538 | int i; |
| 539 | |
| 540 | for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++) |
| 541 | driver_create_file(drv, fw_drv_attrs[i]); |
| 542 | } |
| 543 | |
| 544 | |
| 545 | static void nodemgr_remove_drv_files(struct hpsb_protocol_driver *driver) |
| 546 | { |
| 547 | struct device_driver *drv = &driver->driver; |
| 548 | int i; |
| 549 | |
| 550 | for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++) |
| 551 | driver_remove_file(drv, fw_drv_attrs[i]); |
| 552 | } |
| 553 | |
| 554 | |
| 555 | static void nodemgr_create_ne_dev_files(struct node_entry *ne) |
| 556 | { |
| 557 | struct device *dev = &ne->device; |
| 558 | int i; |
| 559 | |
| 560 | for (i = 0; i < ARRAY_SIZE(fw_ne_attrs); i++) |
| 561 | device_create_file(dev, fw_ne_attrs[i]); |
| 562 | } |
| 563 | |
| 564 | |
| 565 | static void nodemgr_create_host_dev_files(struct hpsb_host *host) |
| 566 | { |
| 567 | struct device *dev = &host->device; |
| 568 | int i; |
| 569 | |
| 570 | for (i = 0; i < ARRAY_SIZE(fw_host_attrs); i++) |
| 571 | device_create_file(dev, fw_host_attrs[i]); |
| 572 | } |
| 573 | |
| 574 | |
| 575 | static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, nodeid_t nodeid); |
| 576 | |
| 577 | static void nodemgr_update_host_dev_links(struct hpsb_host *host) |
| 578 | { |
| 579 | struct device *dev = &host->device; |
| 580 | struct node_entry *ne; |
| 581 | |
| 582 | sysfs_remove_link(&dev->kobj, "irm_id"); |
| 583 | sysfs_remove_link(&dev->kobj, "busmgr_id"); |
| 584 | sysfs_remove_link(&dev->kobj, "host_id"); |
| 585 | |
| 586 | if ((ne = find_entry_by_nodeid(host, host->irm_id))) |
| 587 | sysfs_create_link(&dev->kobj, &ne->device.kobj, "irm_id"); |
| 588 | if ((ne = find_entry_by_nodeid(host, host->busmgr_id))) |
| 589 | sysfs_create_link(&dev->kobj, &ne->device.kobj, "busmgr_id"); |
| 590 | if ((ne = find_entry_by_nodeid(host, host->node_id))) |
| 591 | sysfs_create_link(&dev->kobj, &ne->device.kobj, "host_id"); |
| 592 | } |
| 593 | |
| 594 | static void nodemgr_create_ud_dev_files(struct unit_directory *ud) |
| 595 | { |
| 596 | struct device *dev = &ud->device; |
| 597 | int i; |
| 598 | |
| 599 | for (i = 0; i < ARRAY_SIZE(fw_ud_attrs); i++) |
| 600 | device_create_file(dev, fw_ud_attrs[i]); |
| 601 | |
| 602 | if (ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) |
| 603 | device_create_file(dev, &dev_attr_ud_specifier_id); |
| 604 | |
| 605 | if (ud->flags & UNIT_DIRECTORY_VERSION) |
| 606 | device_create_file(dev, &dev_attr_ud_version); |
| 607 | |
| 608 | if (ud->flags & UNIT_DIRECTORY_VENDOR_ID) { |
| 609 | device_create_file(dev, &dev_attr_ud_vendor_id); |
| 610 | if (ud->vendor_name_kv) |
| 611 | device_create_file(dev, &dev_attr_ud_vendor_name_kv); |
| 612 | } |
| 613 | |
| 614 | if (ud->flags & UNIT_DIRECTORY_MODEL_ID) { |
| 615 | device_create_file(dev, &dev_attr_ud_model_id); |
| 616 | if (ud->model_name_kv) |
| 617 | device_create_file(dev, &dev_attr_ud_model_name_kv); |
| 618 | } |
| 619 | } |
| 620 | |
| 621 | |
| 622 | static int nodemgr_bus_match(struct device * dev, struct device_driver * drv) |
| 623 | { |
| 624 | struct hpsb_protocol_driver *driver; |
| 625 | struct unit_directory *ud; |
| 626 | struct ieee1394_device_id *id; |
| 627 | |
| 628 | /* We only match unit directories */ |
| 629 | if (dev->platform_data != &nodemgr_ud_platform_data) |
| 630 | return 0; |
| 631 | |
| 632 | ud = container_of(dev, struct unit_directory, device); |
| 633 | driver = container_of(drv, struct hpsb_protocol_driver, driver); |
| 634 | |
| 635 | if (ud->ne->in_limbo || ud->ignore_driver) |
| 636 | return 0; |
| 637 | |
| 638 | for (id = driver->id_table; id->match_flags != 0; id++) { |
| 639 | if ((id->match_flags & IEEE1394_MATCH_VENDOR_ID) && |
| 640 | id->vendor_id != ud->vendor_id) |
| 641 | continue; |
| 642 | |
| 643 | if ((id->match_flags & IEEE1394_MATCH_MODEL_ID) && |
| 644 | id->model_id != ud->model_id) |
| 645 | continue; |
| 646 | |
| 647 | if ((id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) && |
| 648 | id->specifier_id != ud->specifier_id) |
| 649 | continue; |
| 650 | |
| 651 | if ((id->match_flags & IEEE1394_MATCH_VERSION) && |
| 652 | id->version != ud->version) |
| 653 | continue; |
| 654 | |
| 655 | return 1; |
| 656 | } |
| 657 | |
| 658 | return 0; |
| 659 | } |
| 660 | |
| 661 | |
| 662 | static void nodemgr_remove_uds(struct node_entry *ne) |
| 663 | { |
| 664 | struct class_device *cdev, *next; |
| 665 | struct unit_directory *ud; |
| 666 | |
| 667 | list_for_each_entry_safe(cdev, next, &nodemgr_ud_class.children, node) { |
| 668 | ud = container_of(cdev, struct unit_directory, class_dev); |
| 669 | |
| 670 | if (ud->ne != ne) |
| 671 | continue; |
| 672 | |
| 673 | class_device_unregister(&ud->class_dev); |
| 674 | device_unregister(&ud->device); |
| 675 | } |
| 676 | } |
| 677 | |
| 678 | |
| 679 | static void nodemgr_remove_ne(struct node_entry *ne) |
| 680 | { |
| 681 | struct device *dev = &ne->device; |
| 682 | |
| 683 | dev = get_device(&ne->device); |
| 684 | if (!dev) |
| 685 | return; |
| 686 | |
| 687 | HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", |
| 688 | NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid); |
| 689 | |
| 690 | nodemgr_remove_uds(ne); |
| 691 | |
| 692 | class_device_unregister(&ne->class_dev); |
| 693 | device_unregister(dev); |
| 694 | |
| 695 | put_device(dev); |
| 696 | } |
| 697 | |
gregkh@suse.de | 64360322 | 2005-03-25 11:45:31 -0800 | [diff] [blame] | 698 | static int __nodemgr_remove_host_dev(struct device *dev, void *data) |
| 699 | { |
| 700 | nodemgr_remove_ne(container_of(dev, struct node_entry, device)); |
| 701 | return 0; |
| 702 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | |
| 704 | static void nodemgr_remove_host_dev(struct device *dev) |
| 705 | { |
gregkh@suse.de | 64360322 | 2005-03-25 11:45:31 -0800 | [diff] [blame] | 706 | device_for_each_child(dev, NULL, __nodemgr_remove_host_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | sysfs_remove_link(&dev->kobj, "irm_id"); |
| 708 | sysfs_remove_link(&dev->kobj, "busmgr_id"); |
| 709 | sysfs_remove_link(&dev->kobj, "host_id"); |
| 710 | } |
| 711 | |
| 712 | |
| 713 | static void nodemgr_update_bus_options(struct node_entry *ne) |
| 714 | { |
| 715 | #ifdef CONFIG_IEEE1394_VERBOSEDEBUG |
| 716 | static const u16 mr[] = { 4, 64, 1024, 0}; |
| 717 | #endif |
| 718 | quadlet_t busoptions = be32_to_cpu(ne->csr->bus_info_data[2]); |
| 719 | |
| 720 | ne->busopt.irmc = (busoptions >> 31) & 1; |
| 721 | ne->busopt.cmc = (busoptions >> 30) & 1; |
| 722 | ne->busopt.isc = (busoptions >> 29) & 1; |
| 723 | ne->busopt.bmc = (busoptions >> 28) & 1; |
| 724 | ne->busopt.pmc = (busoptions >> 27) & 1; |
| 725 | ne->busopt.cyc_clk_acc = (busoptions >> 16) & 0xff; |
| 726 | ne->busopt.max_rec = 1 << (((busoptions >> 12) & 0xf) + 1); |
| 727 | ne->busopt.max_rom = (busoptions >> 8) & 0x3; |
| 728 | ne->busopt.generation = (busoptions >> 4) & 0xf; |
| 729 | ne->busopt.lnkspd = busoptions & 0x7; |
| 730 | |
| 731 | HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d " |
| 732 | "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d", |
| 733 | busoptions, ne->busopt.irmc, ne->busopt.cmc, |
| 734 | ne->busopt.isc, ne->busopt.bmc, ne->busopt.pmc, |
| 735 | ne->busopt.cyc_clk_acc, ne->busopt.max_rec, |
| 736 | mr[ne->busopt.max_rom], |
| 737 | ne->busopt.generation, ne->busopt.lnkspd); |
| 738 | } |
| 739 | |
| 740 | |
| 741 | static struct node_entry *nodemgr_create_node(octlet_t guid, struct csr1212_csr *csr, |
| 742 | struct host_info *hi, nodeid_t nodeid, |
| 743 | unsigned int generation) |
| 744 | { |
| 745 | struct hpsb_host *host = hi->host; |
| 746 | struct node_entry *ne; |
| 747 | |
| 748 | ne = kmalloc(sizeof(struct node_entry), GFP_KERNEL); |
| 749 | if (!ne) return NULL; |
| 750 | |
| 751 | memset(ne, 0, sizeof(struct node_entry)); |
| 752 | |
| 753 | ne->tpool = &host->tpool[nodeid & NODE_MASK]; |
| 754 | |
| 755 | ne->host = host; |
| 756 | ne->nodeid = nodeid; |
| 757 | ne->generation = generation; |
| 758 | ne->needs_probe = 1; |
| 759 | |
| 760 | ne->guid = guid; |
| 761 | ne->guid_vendor_id = (guid >> 40) & 0xffffff; |
| 762 | ne->guid_vendor_oui = nodemgr_find_oui_name(ne->guid_vendor_id); |
| 763 | ne->csr = csr; |
| 764 | |
| 765 | memcpy(&ne->device, &nodemgr_dev_template_ne, |
| 766 | sizeof(ne->device)); |
| 767 | ne->device.parent = &host->device; |
| 768 | snprintf(ne->device.bus_id, BUS_ID_SIZE, "%016Lx", |
| 769 | (unsigned long long)(ne->guid)); |
| 770 | |
| 771 | ne->class_dev.dev = &ne->device; |
| 772 | ne->class_dev.class = &nodemgr_ne_class; |
| 773 | snprintf(ne->class_dev.class_id, BUS_ID_SIZE, "%016Lx", |
| 774 | (unsigned long long)(ne->guid)); |
| 775 | |
| 776 | device_register(&ne->device); |
| 777 | class_device_register(&ne->class_dev); |
| 778 | get_device(&ne->device); |
| 779 | |
| 780 | if (ne->guid_vendor_oui) |
| 781 | device_create_file(&ne->device, &dev_attr_ne_guid_vendor_oui); |
| 782 | nodemgr_create_ne_dev_files(ne); |
| 783 | |
| 784 | nodemgr_update_bus_options(ne); |
| 785 | |
| 786 | HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", |
| 787 | (host->node_id == nodeid) ? "Host" : "Node", |
| 788 | NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid); |
| 789 | |
| 790 | return ne; |
| 791 | } |
| 792 | |
| 793 | |
| 794 | static struct node_entry *find_entry_by_guid(u64 guid) |
| 795 | { |
| 796 | struct class *class = &nodemgr_ne_class; |
| 797 | struct class_device *cdev; |
| 798 | struct node_entry *ne, *ret_ne = NULL; |
| 799 | |
| 800 | down_read(&class->subsys.rwsem); |
| 801 | list_for_each_entry(cdev, &class->children, node) { |
| 802 | ne = container_of(cdev, struct node_entry, class_dev); |
| 803 | |
| 804 | if (ne->guid == guid) { |
| 805 | ret_ne = ne; |
| 806 | break; |
| 807 | } |
| 808 | } |
| 809 | up_read(&class->subsys.rwsem); |
| 810 | |
| 811 | return ret_ne; |
| 812 | } |
| 813 | |
| 814 | |
| 815 | static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, nodeid_t nodeid) |
| 816 | { |
| 817 | struct class *class = &nodemgr_ne_class; |
| 818 | struct class_device *cdev; |
| 819 | struct node_entry *ne, *ret_ne = NULL; |
| 820 | |
| 821 | down_read(&class->subsys.rwsem); |
| 822 | list_for_each_entry(cdev, &class->children, node) { |
| 823 | ne = container_of(cdev, struct node_entry, class_dev); |
| 824 | |
| 825 | if (ne->host == host && ne->nodeid == nodeid) { |
| 826 | ret_ne = ne; |
| 827 | break; |
| 828 | } |
| 829 | } |
| 830 | up_read(&class->subsys.rwsem); |
| 831 | |
| 832 | return ret_ne; |
| 833 | } |
| 834 | |
| 835 | |
| 836 | static void nodemgr_register_device(struct node_entry *ne, |
| 837 | struct unit_directory *ud, struct device *parent) |
| 838 | { |
| 839 | memcpy(&ud->device, &nodemgr_dev_template_ud, |
| 840 | sizeof(ud->device)); |
| 841 | |
| 842 | ud->device.parent = parent; |
| 843 | |
| 844 | snprintf(ud->device.bus_id, BUS_ID_SIZE, "%s-%u", |
| 845 | ne->device.bus_id, ud->id); |
| 846 | |
| 847 | ud->class_dev.dev = &ud->device; |
| 848 | ud->class_dev.class = &nodemgr_ud_class; |
| 849 | snprintf(ud->class_dev.class_id, BUS_ID_SIZE, "%s-%u", |
| 850 | ne->device.bus_id, ud->id); |
| 851 | |
| 852 | device_register(&ud->device); |
| 853 | class_device_register(&ud->class_dev); |
| 854 | get_device(&ud->device); |
| 855 | |
| 856 | if (ud->vendor_oui) |
| 857 | device_create_file(&ud->device, &dev_attr_ud_vendor_oui); |
| 858 | nodemgr_create_ud_dev_files(ud); |
| 859 | } |
| 860 | |
| 861 | |
| 862 | /* This implementation currently only scans the config rom and its |
| 863 | * immediate unit directories looking for software_id and |
| 864 | * software_version entries, in order to get driver autoloading working. */ |
| 865 | static struct unit_directory *nodemgr_process_unit_directory |
| 866 | (struct host_info *hi, struct node_entry *ne, struct csr1212_keyval *ud_kv, |
| 867 | unsigned int *id, struct unit_directory *parent) |
| 868 | { |
| 869 | struct unit_directory *ud; |
| 870 | struct unit_directory *ud_child = NULL; |
| 871 | struct csr1212_dentry *dentry; |
| 872 | struct csr1212_keyval *kv; |
| 873 | u8 last_key_id = 0; |
| 874 | |
| 875 | ud = kmalloc(sizeof(struct unit_directory), GFP_KERNEL); |
| 876 | if (!ud) |
| 877 | goto unit_directory_error; |
| 878 | |
| 879 | memset (ud, 0, sizeof(struct unit_directory)); |
| 880 | |
| 881 | ud->ne = ne; |
| 882 | ud->ignore_driver = ignore_drivers; |
| 883 | ud->address = ud_kv->offset + CSR1212_CONFIG_ROM_SPACE_BASE; |
| 884 | ud->ud_kv = ud_kv; |
| 885 | ud->id = (*id)++; |
| 886 | |
| 887 | csr1212_for_each_dir_entry(ne->csr, kv, ud_kv, dentry) { |
| 888 | switch (kv->key.id) { |
| 889 | case CSR1212_KV_ID_VENDOR: |
| 890 | if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) { |
| 891 | ud->vendor_id = kv->value.immediate; |
| 892 | ud->flags |= UNIT_DIRECTORY_VENDOR_ID; |
| 893 | |
| 894 | if (ud->vendor_id) |
| 895 | ud->vendor_oui = nodemgr_find_oui_name(ud->vendor_id); |
| 896 | } |
| 897 | break; |
| 898 | |
| 899 | case CSR1212_KV_ID_MODEL: |
| 900 | ud->model_id = kv->value.immediate; |
| 901 | ud->flags |= UNIT_DIRECTORY_MODEL_ID; |
| 902 | break; |
| 903 | |
| 904 | case CSR1212_KV_ID_SPECIFIER_ID: |
| 905 | ud->specifier_id = kv->value.immediate; |
| 906 | ud->flags |= UNIT_DIRECTORY_SPECIFIER_ID; |
| 907 | break; |
| 908 | |
| 909 | case CSR1212_KV_ID_VERSION: |
| 910 | ud->version = kv->value.immediate; |
| 911 | ud->flags |= UNIT_DIRECTORY_VERSION; |
| 912 | break; |
| 913 | |
| 914 | case CSR1212_KV_ID_DESCRIPTOR: |
| 915 | if (kv->key.type == CSR1212_KV_TYPE_LEAF && |
| 916 | CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 && |
| 917 | CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 && |
| 918 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 && |
| 919 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 && |
| 920 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) { |
| 921 | switch (last_key_id) { |
| 922 | case CSR1212_KV_ID_VENDOR: |
| 923 | ud->vendor_name_kv = kv; |
| 924 | csr1212_keep_keyval(kv); |
| 925 | break; |
| 926 | |
| 927 | case CSR1212_KV_ID_MODEL: |
| 928 | ud->model_name_kv = kv; |
| 929 | csr1212_keep_keyval(kv); |
| 930 | break; |
| 931 | |
| 932 | } |
| 933 | } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */ |
| 934 | break; |
| 935 | |
| 936 | case CSR1212_KV_ID_DEPENDENT_INFO: |
| 937 | /* Logical Unit Number */ |
| 938 | if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) { |
| 939 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN) { |
| 940 | ud_child = kmalloc(sizeof(struct unit_directory), GFP_KERNEL); |
| 941 | if (!ud_child) |
| 942 | goto unit_directory_error; |
| 943 | memcpy(ud_child, ud, sizeof(struct unit_directory)); |
| 944 | nodemgr_register_device(ne, ud_child, &ne->device); |
| 945 | ud_child = NULL; |
| 946 | |
| 947 | ud->id = (*id)++; |
| 948 | } |
| 949 | ud->lun = kv->value.immediate; |
| 950 | ud->flags |= UNIT_DIRECTORY_HAS_LUN; |
| 951 | |
| 952 | /* Logical Unit Directory */ |
| 953 | } else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) { |
| 954 | /* This should really be done in SBP2 as this is |
| 955 | * doing SBP2 specific parsing. |
| 956 | */ |
| 957 | |
| 958 | /* first register the parent unit */ |
| 959 | ud->flags |= UNIT_DIRECTORY_HAS_LUN_DIRECTORY; |
| 960 | if (ud->device.bus != &ieee1394_bus_type) |
| 961 | nodemgr_register_device(ne, ud, &ne->device); |
| 962 | |
| 963 | /* process the child unit */ |
| 964 | ud_child = nodemgr_process_unit_directory(hi, ne, kv, id, ud); |
| 965 | |
| 966 | if (ud_child == NULL) |
| 967 | break; |
| 968 | |
| 969 | /* inherit unspecified values so hotplug picks it up */ |
| 970 | if ((ud->flags & UNIT_DIRECTORY_MODEL_ID) && |
| 971 | !(ud_child->flags & UNIT_DIRECTORY_MODEL_ID)) |
| 972 | { |
| 973 | ud_child->flags |= UNIT_DIRECTORY_MODEL_ID; |
| 974 | ud_child->model_id = ud->model_id; |
| 975 | } |
| 976 | if ((ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) && |
| 977 | !(ud_child->flags & UNIT_DIRECTORY_SPECIFIER_ID)) |
| 978 | { |
| 979 | ud_child->flags |= UNIT_DIRECTORY_SPECIFIER_ID; |
| 980 | ud_child->specifier_id = ud->specifier_id; |
| 981 | } |
| 982 | if ((ud->flags & UNIT_DIRECTORY_VERSION) && |
| 983 | !(ud_child->flags & UNIT_DIRECTORY_VERSION)) |
| 984 | { |
| 985 | ud_child->flags |= UNIT_DIRECTORY_VERSION; |
| 986 | ud_child->version = ud->version; |
| 987 | } |
| 988 | |
| 989 | /* register the child unit */ |
| 990 | ud_child->flags |= UNIT_DIRECTORY_LUN_DIRECTORY; |
| 991 | nodemgr_register_device(ne, ud_child, &ud->device); |
| 992 | } |
| 993 | |
| 994 | break; |
| 995 | |
| 996 | default: |
| 997 | break; |
| 998 | } |
| 999 | last_key_id = kv->key.id; |
| 1000 | } |
| 1001 | |
| 1002 | /* do not process child units here and only if not already registered */ |
| 1003 | if (!parent && ud->device.bus != &ieee1394_bus_type) |
| 1004 | nodemgr_register_device(ne, ud, &ne->device); |
| 1005 | |
| 1006 | return ud; |
| 1007 | |
| 1008 | unit_directory_error: |
Jody McIntyre | 616b859 | 2005-05-16 21:54:01 -0700 | [diff] [blame] | 1009 | kfree(ud); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1010 | return NULL; |
| 1011 | } |
| 1012 | |
| 1013 | |
| 1014 | static void nodemgr_process_root_directory(struct host_info *hi, struct node_entry *ne) |
| 1015 | { |
| 1016 | unsigned int ud_id = 0; |
| 1017 | struct csr1212_dentry *dentry; |
| 1018 | struct csr1212_keyval *kv; |
| 1019 | u8 last_key_id = 0; |
| 1020 | |
| 1021 | ne->needs_probe = 0; |
| 1022 | |
| 1023 | csr1212_for_each_dir_entry(ne->csr, kv, ne->csr->root_kv, dentry) { |
| 1024 | switch (kv->key.id) { |
| 1025 | case CSR1212_KV_ID_VENDOR: |
| 1026 | ne->vendor_id = kv->value.immediate; |
| 1027 | |
| 1028 | if (ne->vendor_id) |
| 1029 | ne->vendor_oui = nodemgr_find_oui_name(ne->vendor_id); |
| 1030 | break; |
| 1031 | |
| 1032 | case CSR1212_KV_ID_NODE_CAPABILITIES: |
| 1033 | ne->capabilities = kv->value.immediate; |
| 1034 | break; |
| 1035 | |
| 1036 | case CSR1212_KV_ID_UNIT: |
| 1037 | nodemgr_process_unit_directory(hi, ne, kv, &ud_id, NULL); |
| 1038 | break; |
| 1039 | |
| 1040 | case CSR1212_KV_ID_DESCRIPTOR: |
| 1041 | if (last_key_id == CSR1212_KV_ID_VENDOR) { |
| 1042 | if (kv->key.type == CSR1212_KV_TYPE_LEAF && |
| 1043 | CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 && |
| 1044 | CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 && |
| 1045 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 && |
| 1046 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 && |
| 1047 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) { |
| 1048 | ne->vendor_name_kv = kv; |
| 1049 | csr1212_keep_keyval(kv); |
| 1050 | } |
| 1051 | } |
| 1052 | break; |
| 1053 | } |
| 1054 | last_key_id = kv->key.id; |
| 1055 | } |
| 1056 | |
| 1057 | if (ne->vendor_oui) |
| 1058 | device_create_file(&ne->device, &dev_attr_ne_vendor_oui); |
| 1059 | if (ne->vendor_name_kv) |
| 1060 | device_create_file(&ne->device, &dev_attr_ne_vendor_name_kv); |
| 1061 | } |
| 1062 | |
| 1063 | #ifdef CONFIG_HOTPLUG |
| 1064 | |
| 1065 | static int nodemgr_hotplug(struct class_device *cdev, char **envp, int num_envp, |
| 1066 | char *buffer, int buffer_size) |
| 1067 | { |
| 1068 | struct unit_directory *ud; |
| 1069 | int i = 0; |
| 1070 | int length = 0; |
| 1071 | |
| 1072 | if (!cdev) |
| 1073 | return -ENODEV; |
| 1074 | |
| 1075 | ud = container_of(cdev, struct unit_directory, class_dev); |
| 1076 | |
| 1077 | if (ud->ne->in_limbo || ud->ignore_driver) |
| 1078 | return -ENODEV; |
| 1079 | |
| 1080 | #define PUT_ENVP(fmt,val) \ |
| 1081 | do { \ |
| 1082 | int printed; \ |
| 1083 | envp[i++] = buffer; \ |
| 1084 | printed = snprintf(buffer, buffer_size - length, \ |
| 1085 | fmt, val); \ |
| 1086 | if ((buffer_size - (length+printed) <= 0) || (i >= num_envp)) \ |
| 1087 | return -ENOMEM; \ |
| 1088 | length += printed+1; \ |
| 1089 | buffer += printed+1; \ |
| 1090 | } while (0) |
| 1091 | |
| 1092 | PUT_ENVP("VENDOR_ID=%06x", ud->vendor_id); |
| 1093 | PUT_ENVP("MODEL_ID=%06x", ud->model_id); |
| 1094 | PUT_ENVP("GUID=%016Lx", (unsigned long long)ud->ne->guid); |
| 1095 | PUT_ENVP("SPECIFIER_ID=%06x", ud->specifier_id); |
| 1096 | PUT_ENVP("VERSION=%06x", ud->version); |
| 1097 | |
| 1098 | #undef PUT_ENVP |
| 1099 | |
| 1100 | envp[i] = NULL; |
| 1101 | |
| 1102 | return 0; |
| 1103 | } |
| 1104 | |
| 1105 | #else |
| 1106 | |
| 1107 | static int nodemgr_hotplug(struct class_device *cdev, char **envp, int num_envp, |
| 1108 | char *buffer, int buffer_size) |
| 1109 | { |
| 1110 | return -ENODEV; |
| 1111 | } |
| 1112 | |
| 1113 | #endif /* CONFIG_HOTPLUG */ |
| 1114 | |
| 1115 | |
| 1116 | int hpsb_register_protocol(struct hpsb_protocol_driver *driver) |
| 1117 | { |
| 1118 | int ret; |
| 1119 | |
| 1120 | /* This will cause a probe for devices */ |
| 1121 | ret = driver_register(&driver->driver); |
| 1122 | if (!ret) |
| 1123 | nodemgr_create_drv_files(driver); |
| 1124 | |
| 1125 | return ret; |
| 1126 | } |
| 1127 | |
| 1128 | void hpsb_unregister_protocol(struct hpsb_protocol_driver *driver) |
| 1129 | { |
| 1130 | nodemgr_remove_drv_files(driver); |
| 1131 | /* This will subsequently disconnect all devices that our driver |
| 1132 | * is attached to. */ |
| 1133 | driver_unregister(&driver->driver); |
| 1134 | } |
| 1135 | |
| 1136 | |
| 1137 | /* |
| 1138 | * This function updates nodes that were present on the bus before the |
| 1139 | * reset and still are after the reset. The nodeid and the config rom |
| 1140 | * may have changed, and the drivers managing this device must be |
| 1141 | * informed that this device just went through a bus reset, to allow |
| 1142 | * the to take whatever actions required. |
| 1143 | */ |
| 1144 | static void nodemgr_update_node(struct node_entry *ne, struct csr1212_csr *csr, |
| 1145 | struct host_info *hi, nodeid_t nodeid, |
| 1146 | unsigned int generation) |
| 1147 | { |
| 1148 | if (ne->nodeid != nodeid) { |
| 1149 | HPSB_DEBUG("Node changed: " NODE_BUS_FMT " -> " NODE_BUS_FMT, |
| 1150 | NODE_BUS_ARGS(ne->host, ne->nodeid), |
| 1151 | NODE_BUS_ARGS(ne->host, nodeid)); |
| 1152 | ne->nodeid = nodeid; |
| 1153 | } |
| 1154 | |
| 1155 | if (ne->busopt.generation != ((be32_to_cpu(csr->bus_info_data[2]) >> 4) & 0xf)) { |
| 1156 | kfree(ne->csr->private); |
| 1157 | csr1212_destroy_csr(ne->csr); |
| 1158 | ne->csr = csr; |
| 1159 | |
| 1160 | /* If the node's configrom generation has changed, we |
| 1161 | * unregister all the unit directories. */ |
| 1162 | nodemgr_remove_uds(ne); |
| 1163 | |
| 1164 | nodemgr_update_bus_options(ne); |
| 1165 | |
| 1166 | /* Mark the node as new, so it gets re-probed */ |
| 1167 | ne->needs_probe = 1; |
| 1168 | } else { |
| 1169 | /* old cache is valid, so update its generation */ |
| 1170 | struct nodemgr_csr_info *ci = ne->csr->private; |
| 1171 | ci->generation = generation; |
| 1172 | /* free the partially filled now unneeded new cache */ |
| 1173 | kfree(csr->private); |
| 1174 | csr1212_destroy_csr(csr); |
| 1175 | } |
| 1176 | |
| 1177 | if (ne->in_limbo) |
| 1178 | nodemgr_resume_ne(ne); |
| 1179 | |
| 1180 | /* Mark the node current */ |
| 1181 | ne->generation = generation; |
| 1182 | } |
| 1183 | |
| 1184 | |
| 1185 | |
| 1186 | static void nodemgr_node_scan_one(struct host_info *hi, |
| 1187 | nodeid_t nodeid, int generation) |
| 1188 | { |
| 1189 | struct hpsb_host *host = hi->host; |
| 1190 | struct node_entry *ne; |
| 1191 | octlet_t guid; |
| 1192 | struct csr1212_csr *csr; |
| 1193 | struct nodemgr_csr_info *ci; |
| 1194 | |
| 1195 | ci = kmalloc(sizeof(struct nodemgr_csr_info), GFP_KERNEL); |
| 1196 | if (!ci) |
| 1197 | return; |
| 1198 | |
| 1199 | ci->host = host; |
| 1200 | ci->nodeid = nodeid; |
| 1201 | ci->generation = generation; |
| 1202 | |
| 1203 | /* We need to detect when the ConfigROM's generation has changed, |
| 1204 | * so we only update the node's info when it needs to be. */ |
| 1205 | |
| 1206 | csr = csr1212_create_csr(&nodemgr_csr_ops, 5 * sizeof(quadlet_t), ci); |
| 1207 | if (!csr || csr1212_parse_csr(csr) != CSR1212_SUCCESS) { |
| 1208 | HPSB_ERR("Error parsing configrom for node " NODE_BUS_FMT, |
| 1209 | NODE_BUS_ARGS(host, nodeid)); |
| 1210 | if (csr) |
| 1211 | csr1212_destroy_csr(csr); |
| 1212 | kfree(ci); |
| 1213 | return; |
| 1214 | } |
| 1215 | |
| 1216 | if (csr->bus_info_data[1] != IEEE1394_BUSID_MAGIC) { |
| 1217 | /* This isn't a 1394 device, but we let it slide. There |
| 1218 | * was a report of a device with broken firmware which |
| 1219 | * reported '2394' instead of '1394', which is obviously a |
| 1220 | * mistake. One would hope that a non-1394 device never |
| 1221 | * gets connected to Firewire bus. If someone does, we |
| 1222 | * shouldn't be held responsible, so we'll allow it with a |
| 1223 | * warning. */ |
| 1224 | HPSB_WARN("Node " NODE_BUS_FMT " has invalid busID magic [0x%08x]", |
| 1225 | NODE_BUS_ARGS(host, nodeid), csr->bus_info_data[1]); |
| 1226 | } |
| 1227 | |
| 1228 | guid = ((u64)be32_to_cpu(csr->bus_info_data[3]) << 32) | be32_to_cpu(csr->bus_info_data[4]); |
| 1229 | ne = find_entry_by_guid(guid); |
| 1230 | |
| 1231 | if (ne && ne->host != host && ne->in_limbo) { |
| 1232 | /* Must have moved this device from one host to another */ |
| 1233 | nodemgr_remove_ne(ne); |
| 1234 | ne = NULL; |
| 1235 | } |
| 1236 | |
| 1237 | if (!ne) |
| 1238 | nodemgr_create_node(guid, csr, hi, nodeid, generation); |
| 1239 | else |
| 1240 | nodemgr_update_node(ne, csr, hi, nodeid, generation); |
| 1241 | |
| 1242 | return; |
| 1243 | } |
| 1244 | |
| 1245 | |
| 1246 | static void nodemgr_node_scan(struct host_info *hi, int generation) |
| 1247 | { |
| 1248 | int count; |
| 1249 | struct hpsb_host *host = hi->host; |
| 1250 | struct selfid *sid = (struct selfid *)host->topology_map; |
| 1251 | nodeid_t nodeid = LOCAL_BUS; |
| 1252 | |
| 1253 | /* Scan each node on the bus */ |
| 1254 | for (count = host->selfid_count; count; count--, sid++) { |
| 1255 | if (sid->extended) |
| 1256 | continue; |
| 1257 | |
| 1258 | if (!sid->link_active) { |
| 1259 | nodeid++; |
| 1260 | continue; |
| 1261 | } |
| 1262 | nodemgr_node_scan_one(hi, nodeid++, generation); |
| 1263 | } |
| 1264 | } |
| 1265 | |
| 1266 | |
| 1267 | static void nodemgr_suspend_ne(struct node_entry *ne) |
| 1268 | { |
| 1269 | struct class_device *cdev; |
| 1270 | struct unit_directory *ud; |
| 1271 | |
| 1272 | HPSB_DEBUG("Node suspended: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", |
| 1273 | NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid); |
| 1274 | |
| 1275 | ne->in_limbo = 1; |
| 1276 | device_create_file(&ne->device, &dev_attr_ne_in_limbo); |
| 1277 | |
| 1278 | down_write(&ne->device.bus->subsys.rwsem); |
| 1279 | list_for_each_entry(cdev, &nodemgr_ud_class.children, node) { |
| 1280 | ud = container_of(cdev, struct unit_directory, class_dev); |
| 1281 | |
| 1282 | if (ud->ne != ne) |
| 1283 | continue; |
| 1284 | |
| 1285 | if (ud->device.driver && |
| 1286 | (!ud->device.driver->suspend || |
| 1287 | ud->device.driver->suspend(&ud->device, PMSG_SUSPEND, 0))) |
| 1288 | device_release_driver(&ud->device); |
| 1289 | } |
| 1290 | up_write(&ne->device.bus->subsys.rwsem); |
| 1291 | } |
| 1292 | |
| 1293 | |
| 1294 | static void nodemgr_resume_ne(struct node_entry *ne) |
| 1295 | { |
| 1296 | struct class_device *cdev; |
| 1297 | struct unit_directory *ud; |
| 1298 | |
| 1299 | ne->in_limbo = 0; |
| 1300 | device_remove_file(&ne->device, &dev_attr_ne_in_limbo); |
| 1301 | |
| 1302 | down_read(&ne->device.bus->subsys.rwsem); |
| 1303 | list_for_each_entry(cdev, &nodemgr_ud_class.children, node) { |
| 1304 | ud = container_of(cdev, struct unit_directory, class_dev); |
| 1305 | |
| 1306 | if (ud->ne != ne) |
| 1307 | continue; |
| 1308 | |
| 1309 | if (ud->device.driver && ud->device.driver->resume) |
| 1310 | ud->device.driver->resume(&ud->device, 0); |
| 1311 | } |
| 1312 | up_read(&ne->device.bus->subsys.rwsem); |
| 1313 | |
| 1314 | HPSB_DEBUG("Node resumed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", |
| 1315 | NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid); |
| 1316 | } |
| 1317 | |
| 1318 | |
| 1319 | static void nodemgr_update_pdrv(struct node_entry *ne) |
| 1320 | { |
| 1321 | struct unit_directory *ud; |
| 1322 | struct hpsb_protocol_driver *pdrv; |
| 1323 | struct class *class = &nodemgr_ud_class; |
| 1324 | struct class_device *cdev; |
| 1325 | |
| 1326 | down_read(&class->subsys.rwsem); |
| 1327 | list_for_each_entry(cdev, &class->children, node) { |
| 1328 | ud = container_of(cdev, struct unit_directory, class_dev); |
| 1329 | if (ud->ne != ne || !ud->device.driver) |
| 1330 | continue; |
| 1331 | |
| 1332 | pdrv = container_of(ud->device.driver, struct hpsb_protocol_driver, driver); |
| 1333 | |
| 1334 | if (pdrv->update && pdrv->update(ud)) { |
| 1335 | down_write(&ud->device.bus->subsys.rwsem); |
| 1336 | device_release_driver(&ud->device); |
| 1337 | up_write(&ud->device.bus->subsys.rwsem); |
| 1338 | } |
| 1339 | } |
| 1340 | up_read(&class->subsys.rwsem); |
| 1341 | } |
| 1342 | |
| 1343 | |
| 1344 | static void nodemgr_probe_ne(struct host_info *hi, struct node_entry *ne, int generation) |
| 1345 | { |
| 1346 | struct device *dev; |
| 1347 | |
| 1348 | if (ne->host != hi->host || ne->in_limbo) |
| 1349 | return; |
| 1350 | |
| 1351 | dev = get_device(&ne->device); |
| 1352 | if (!dev) |
| 1353 | return; |
| 1354 | |
| 1355 | /* If "needs_probe", then this is either a new or changed node we |
| 1356 | * rescan totally. If the generation matches for an existing node |
| 1357 | * (one that existed prior to the bus reset) we send update calls |
| 1358 | * down to the drivers. Otherwise, this is a dead node and we |
| 1359 | * suspend it. */ |
| 1360 | if (ne->needs_probe) |
| 1361 | nodemgr_process_root_directory(hi, ne); |
| 1362 | else if (ne->generation == generation) |
| 1363 | nodemgr_update_pdrv(ne); |
| 1364 | else |
| 1365 | nodemgr_suspend_ne(ne); |
| 1366 | |
| 1367 | put_device(dev); |
| 1368 | } |
| 1369 | |
| 1370 | |
| 1371 | static void nodemgr_node_probe(struct host_info *hi, int generation) |
| 1372 | { |
| 1373 | struct hpsb_host *host = hi->host; |
| 1374 | struct class *class = &nodemgr_ne_class; |
| 1375 | struct class_device *cdev; |
| 1376 | |
| 1377 | /* Do some processing of the nodes we've probed. This pulls them |
| 1378 | * into the sysfs layer if needed, and can result in processing of |
| 1379 | * unit-directories, or just updating the node and it's |
| 1380 | * unit-directories. */ |
| 1381 | down_read(&class->subsys.rwsem); |
| 1382 | list_for_each_entry(cdev, &class->children, node) |
| 1383 | nodemgr_probe_ne(hi, container_of(cdev, struct node_entry, class_dev), generation); |
| 1384 | up_read(&class->subsys.rwsem); |
| 1385 | |
| 1386 | |
| 1387 | /* If we had a bus reset while we were scanning the bus, it is |
| 1388 | * possible that we did not probe all nodes. In that case, we |
| 1389 | * skip the clean up for now, since we could remove nodes that |
| 1390 | * were still on the bus. The bus reset increased hi->reset_sem, |
| 1391 | * so there's a bus scan pending which will do the clean up |
| 1392 | * eventually. |
| 1393 | * |
| 1394 | * Now let's tell the bus to rescan our devices. This may seem |
| 1395 | * like overhead, but the driver-model core will only scan a |
| 1396 | * device for a driver when either the device is added, or when a |
| 1397 | * new driver is added. A bus reset is a good reason to rescan |
| 1398 | * devices that were there before. For example, an sbp2 device |
| 1399 | * may become available for login, if the host that held it was |
| 1400 | * just removed. */ |
| 1401 | |
| 1402 | if (generation == get_hpsb_generation(host)) |
| 1403 | bus_rescan_devices(&ieee1394_bus_type); |
| 1404 | |
| 1405 | return; |
| 1406 | } |
| 1407 | |
| 1408 | /* Because we are a 1394a-2000 compliant IRM, we need to inform all the other |
| 1409 | * nodes of the broadcast channel. (Really we're only setting the validity |
| 1410 | * bit). Other IRM responsibilities go in here as well. */ |
| 1411 | static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles) |
| 1412 | { |
| 1413 | quadlet_t bc; |
| 1414 | |
| 1415 | /* if irm_id == -1 then there is no IRM on this bus */ |
| 1416 | if (!host->is_irm || host->irm_id == (nodeid_t)-1) |
| 1417 | return 1; |
| 1418 | |
| 1419 | host->csr.broadcast_channel |= 0x40000000; /* set validity bit */ |
| 1420 | |
| 1421 | bc = cpu_to_be32(host->csr.broadcast_channel); |
| 1422 | |
| 1423 | hpsb_write(host, LOCAL_BUS | ALL_NODES, get_hpsb_generation(host), |
| 1424 | (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL), |
| 1425 | &bc, sizeof(quadlet_t)); |
| 1426 | |
| 1427 | /* If there is no bus manager then we should set the root node's |
| 1428 | * force_root bit to promote bus stability per the 1394 |
| 1429 | * spec. (8.4.2.6) */ |
| 1430 | if (host->busmgr_id == 0xffff && host->node_count > 1) |
| 1431 | { |
| 1432 | u16 root_node = host->node_count - 1; |
| 1433 | struct node_entry *ne = find_entry_by_nodeid(host, root_node | LOCAL_BUS); |
| 1434 | |
| 1435 | if (ne && ne->busopt.cmc) |
| 1436 | hpsb_send_phy_config(host, root_node, -1); |
| 1437 | else { |
| 1438 | HPSB_DEBUG("The root node is not cycle master capable; " |
| 1439 | "selecting a new root node and resetting..."); |
| 1440 | |
| 1441 | if (cycles >= 5) { |
| 1442 | /* Oh screw it! Just leave the bus as it is */ |
| 1443 | HPSB_DEBUG("Stopping reset loop for IRM sanity"); |
| 1444 | return 1; |
| 1445 | } |
| 1446 | |
| 1447 | hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1); |
| 1448 | hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT); |
| 1449 | |
| 1450 | return 0; |
| 1451 | } |
| 1452 | } |
| 1453 | |
| 1454 | return 1; |
| 1455 | } |
| 1456 | |
| 1457 | /* We need to ensure that if we are not the IRM, that the IRM node is capable of |
| 1458 | * everything we can do, otherwise issue a bus reset and try to become the IRM |
| 1459 | * ourselves. */ |
| 1460 | static int nodemgr_check_irm_capability(struct hpsb_host *host, int cycles) |
| 1461 | { |
| 1462 | quadlet_t bc; |
| 1463 | int status; |
| 1464 | |
| 1465 | if (hpsb_disable_irm || host->is_irm) |
| 1466 | return 1; |
| 1467 | |
| 1468 | status = hpsb_read(host, LOCAL_BUS | (host->irm_id), |
| 1469 | get_hpsb_generation(host), |
| 1470 | (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL), |
| 1471 | &bc, sizeof(quadlet_t)); |
| 1472 | |
| 1473 | if (status < 0 || !(be32_to_cpu(bc) & 0x80000000)) { |
| 1474 | /* The current irm node does not have a valid BROADCAST_CHANNEL |
| 1475 | * register and we do, so reset the bus with force_root set */ |
| 1476 | HPSB_DEBUG("Current remote IRM is not 1394a-2000 compliant, resetting..."); |
| 1477 | |
| 1478 | if (cycles >= 5) { |
| 1479 | /* Oh screw it! Just leave the bus as it is */ |
| 1480 | HPSB_DEBUG("Stopping reset loop for IRM sanity"); |
| 1481 | return 1; |
| 1482 | } |
| 1483 | |
| 1484 | hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1); |
| 1485 | hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT); |
| 1486 | |
| 1487 | return 0; |
| 1488 | } |
| 1489 | |
| 1490 | return 1; |
| 1491 | } |
| 1492 | |
| 1493 | static int nodemgr_host_thread(void *__hi) |
| 1494 | { |
| 1495 | struct host_info *hi = (struct host_info *)__hi; |
| 1496 | struct hpsb_host *host = hi->host; |
| 1497 | int reset_cycles = 0; |
| 1498 | |
| 1499 | /* No userlevel access needed */ |
| 1500 | daemonize(hi->daemon_name); |
| 1501 | |
| 1502 | /* Setup our device-model entries */ |
| 1503 | nodemgr_create_host_dev_files(host); |
| 1504 | |
| 1505 | /* Sit and wait for a signal to probe the nodes on the bus. This |
| 1506 | * happens when we get a bus reset. */ |
| 1507 | while (1) { |
| 1508 | unsigned int generation = 0; |
| 1509 | int i; |
| 1510 | |
| 1511 | if (down_interruptible(&hi->reset_sem) || |
| 1512 | down_interruptible(&nodemgr_serialize)) { |
Christoph Lameter | 3e1d1d2 | 2005-06-24 23:13:50 -0700 | [diff] [blame] | 1513 | if (try_to_freeze()) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1514 | continue; |
| 1515 | printk("NodeMgr: received unexpected signal?!\n" ); |
| 1516 | break; |
| 1517 | } |
| 1518 | |
| 1519 | if (hi->kill_me) { |
| 1520 | up(&nodemgr_serialize); |
| 1521 | break; |
| 1522 | } |
| 1523 | |
| 1524 | /* Pause for 1/4 second in 1/16 second intervals, |
| 1525 | * to make sure things settle down. */ |
| 1526 | for (i = 0; i < 4 ; i++) { |
| 1527 | set_current_state(TASK_INTERRUPTIBLE); |
| 1528 | if (msleep_interruptible(63)) { |
| 1529 | up(&nodemgr_serialize); |
| 1530 | goto caught_signal; |
| 1531 | } |
| 1532 | |
| 1533 | /* Now get the generation in which the node ID's we collect |
| 1534 | * are valid. During the bus scan we will use this generation |
| 1535 | * for the read transactions, so that if another reset occurs |
| 1536 | * during the scan the transactions will fail instead of |
| 1537 | * returning bogus data. */ |
| 1538 | generation = get_hpsb_generation(host); |
| 1539 | |
| 1540 | /* If we get a reset before we are done waiting, then |
| 1541 | * start the the waiting over again */ |
| 1542 | while (!down_trylock(&hi->reset_sem)) |
| 1543 | i = 0; |
| 1544 | |
| 1545 | /* Check the kill_me again */ |
| 1546 | if (hi->kill_me) { |
| 1547 | up(&nodemgr_serialize); |
| 1548 | goto caught_signal; |
| 1549 | } |
| 1550 | } |
| 1551 | |
| 1552 | if (!nodemgr_check_irm_capability(host, reset_cycles)) { |
| 1553 | reset_cycles++; |
| 1554 | up(&nodemgr_serialize); |
| 1555 | continue; |
| 1556 | } |
| 1557 | |
| 1558 | /* Scan our nodes to get the bus options and create node |
| 1559 | * entries. This does not do the sysfs stuff, since that |
| 1560 | * would trigger hotplug callbacks and such, which is a |
| 1561 | * bad idea at this point. */ |
| 1562 | nodemgr_node_scan(hi, generation); |
| 1563 | if (!nodemgr_do_irm_duties(host, reset_cycles)) { |
| 1564 | reset_cycles++; |
| 1565 | up(&nodemgr_serialize); |
| 1566 | continue; |
| 1567 | } |
| 1568 | |
| 1569 | reset_cycles = 0; |
| 1570 | |
| 1571 | /* This actually does the full probe, with sysfs |
| 1572 | * registration. */ |
| 1573 | nodemgr_node_probe(hi, generation); |
| 1574 | |
| 1575 | /* Update some of our sysfs symlinks */ |
| 1576 | nodemgr_update_host_dev_links(host); |
| 1577 | |
| 1578 | up(&nodemgr_serialize); |
| 1579 | } |
| 1580 | |
| 1581 | caught_signal: |
| 1582 | HPSB_VERBOSE("NodeMgr: Exiting thread"); |
| 1583 | |
| 1584 | complete_and_exit(&hi->exited, 0); |
| 1585 | } |
| 1586 | |
| 1587 | int nodemgr_for_each_host(void *__data, int (*cb)(struct hpsb_host *, void *)) |
| 1588 | { |
| 1589 | struct class *class = &hpsb_host_class; |
| 1590 | struct class_device *cdev; |
| 1591 | struct hpsb_host *host; |
| 1592 | int error = 0; |
| 1593 | |
| 1594 | down_read(&class->subsys.rwsem); |
| 1595 | list_for_each_entry(cdev, &class->children, node) { |
| 1596 | host = container_of(cdev, struct hpsb_host, class_dev); |
| 1597 | |
| 1598 | if ((error = cb(host, __data))) |
| 1599 | break; |
| 1600 | } |
| 1601 | up_read(&class->subsys.rwsem); |
| 1602 | |
| 1603 | return error; |
| 1604 | } |
| 1605 | |
| 1606 | /* The following four convenience functions use a struct node_entry |
| 1607 | * for addressing a node on the bus. They are intended for use by any |
| 1608 | * process context, not just the nodemgr thread, so we need to be a |
| 1609 | * little careful when reading out the node ID and generation. The |
| 1610 | * thing that can go wrong is that we get the node ID, then a bus |
| 1611 | * reset occurs, and then we read the generation. The node ID is |
| 1612 | * possibly invalid, but the generation is current, and we end up |
| 1613 | * sending a packet to a the wrong node. |
| 1614 | * |
| 1615 | * The solution is to make sure we read the generation first, so that |
| 1616 | * if a reset occurs in the process, we end up with a stale generation |
| 1617 | * and the transactions will fail instead of silently using wrong node |
| 1618 | * ID's. |
| 1619 | */ |
| 1620 | |
| 1621 | void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *pkt) |
| 1622 | { |
| 1623 | pkt->host = ne->host; |
| 1624 | pkt->generation = ne->generation; |
| 1625 | barrier(); |
| 1626 | pkt->node_id = ne->nodeid; |
| 1627 | } |
| 1628 | |
| 1629 | int hpsb_node_write(struct node_entry *ne, u64 addr, |
| 1630 | quadlet_t *buffer, size_t length) |
| 1631 | { |
| 1632 | unsigned int generation = ne->generation; |
| 1633 | |
| 1634 | barrier(); |
| 1635 | return hpsb_write(ne->host, ne->nodeid, generation, |
| 1636 | addr, buffer, length); |
| 1637 | } |
| 1638 | |
| 1639 | static void nodemgr_add_host(struct hpsb_host *host) |
| 1640 | { |
| 1641 | struct host_info *hi; |
| 1642 | |
| 1643 | hi = hpsb_create_hostinfo(&nodemgr_highlevel, host, sizeof(*hi)); |
| 1644 | |
| 1645 | if (!hi) { |
| 1646 | HPSB_ERR ("NodeMgr: out of memory in add host"); |
| 1647 | return; |
| 1648 | } |
| 1649 | |
| 1650 | hi->host = host; |
| 1651 | init_completion(&hi->exited); |
| 1652 | sema_init(&hi->reset_sem, 0); |
| 1653 | |
| 1654 | sprintf(hi->daemon_name, "knodemgrd_%d", host->id); |
| 1655 | |
| 1656 | hi->pid = kernel_thread(nodemgr_host_thread, hi, CLONE_KERNEL); |
| 1657 | |
| 1658 | if (hi->pid < 0) { |
| 1659 | HPSB_ERR ("NodeMgr: failed to start %s thread for %s", |
| 1660 | hi->daemon_name, host->driver->name); |
| 1661 | hpsb_destroy_hostinfo(&nodemgr_highlevel, host); |
| 1662 | return; |
| 1663 | } |
| 1664 | |
| 1665 | return; |
| 1666 | } |
| 1667 | |
| 1668 | static void nodemgr_host_reset(struct hpsb_host *host) |
| 1669 | { |
| 1670 | struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host); |
| 1671 | |
| 1672 | if (hi != NULL) { |
| 1673 | HPSB_VERBOSE("NodeMgr: Processing host reset for %s", hi->daemon_name); |
| 1674 | up(&hi->reset_sem); |
| 1675 | } else |
| 1676 | HPSB_ERR ("NodeMgr: could not process reset of unused host"); |
| 1677 | |
| 1678 | return; |
| 1679 | } |
| 1680 | |
| 1681 | static void nodemgr_remove_host(struct hpsb_host *host) |
| 1682 | { |
| 1683 | struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host); |
| 1684 | |
| 1685 | if (hi) { |
| 1686 | if (hi->pid >= 0) { |
| 1687 | hi->kill_me = 1; |
| 1688 | mb(); |
| 1689 | up(&hi->reset_sem); |
| 1690 | wait_for_completion(&hi->exited); |
| 1691 | nodemgr_remove_host_dev(&host->device); |
| 1692 | } |
| 1693 | } else |
| 1694 | HPSB_ERR("NodeMgr: host %s does not exist, cannot remove", |
| 1695 | host->driver->name); |
| 1696 | |
| 1697 | return; |
| 1698 | } |
| 1699 | |
| 1700 | static struct hpsb_highlevel nodemgr_highlevel = { |
| 1701 | .name = "Node manager", |
| 1702 | .add_host = nodemgr_add_host, |
| 1703 | .host_reset = nodemgr_host_reset, |
| 1704 | .remove_host = nodemgr_remove_host, |
| 1705 | }; |
| 1706 | |
| 1707 | int init_ieee1394_nodemgr(void) |
| 1708 | { |
| 1709 | int ret; |
| 1710 | |
| 1711 | ret = class_register(&nodemgr_ne_class); |
| 1712 | if (ret < 0) |
| 1713 | return ret; |
| 1714 | |
| 1715 | ret = class_register(&nodemgr_ud_class); |
| 1716 | if (ret < 0) { |
| 1717 | class_unregister(&nodemgr_ne_class); |
| 1718 | return ret; |
| 1719 | } |
| 1720 | |
| 1721 | hpsb_register_highlevel(&nodemgr_highlevel); |
| 1722 | |
| 1723 | return 0; |
| 1724 | } |
| 1725 | |
| 1726 | void cleanup_ieee1394_nodemgr(void) |
| 1727 | { |
| 1728 | hpsb_unregister_highlevel(&nodemgr_highlevel); |
| 1729 | |
| 1730 | class_unregister(&nodemgr_ud_class); |
| 1731 | class_unregister(&nodemgr_ne_class); |
| 1732 | } |