Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Device probing and sysfs code. |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 3 | * |
| 4 | * Copyright (C) 2005-2006 Kristian Hoegsberg <krh@bitplanet.net> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software Foundation, |
| 18 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 19 | */ |
| 20 | |
| 21 | #include <linux/module.h> |
| 22 | #include <linux/wait.h> |
| 23 | #include <linux/errno.h> |
| 24 | #include <linux/kthread.h> |
| 25 | #include <linux/device.h> |
| 26 | #include <linux/delay.h> |
Kristian Høgsberg | a3aca3d | 2007-03-07 12:12:44 -0500 | [diff] [blame] | 27 | #include <linux/idr.h> |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame^] | 28 | #include <linux/string.h> |
Stefan Richter | 633c52d | 2007-03-19 11:37:16 -0400 | [diff] [blame] | 29 | #include <asm/semaphore.h> |
Stefan Richter | b5d2a5e | 2008-01-25 18:57:41 +0100 | [diff] [blame] | 30 | #include <asm/system.h> |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 31 | #include <linux/ctype.h> |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 32 | #include "fw-transaction.h" |
| 33 | #include "fw-topology.h" |
| 34 | #include "fw-device.h" |
| 35 | |
| 36 | void fw_csr_iterator_init(struct fw_csr_iterator *ci, u32 * p) |
| 37 | { |
| 38 | ci->p = p + 1; |
| 39 | ci->end = ci->p + (p[0] >> 16); |
| 40 | } |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 41 | EXPORT_SYMBOL(fw_csr_iterator_init); |
| 42 | |
| 43 | int fw_csr_iterator_next(struct fw_csr_iterator *ci, int *key, int *value) |
| 44 | { |
| 45 | *key = *ci->p >> 24; |
| 46 | *value = *ci->p & 0xffffff; |
| 47 | |
| 48 | return ci->p++ < ci->end; |
| 49 | } |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 50 | EXPORT_SYMBOL(fw_csr_iterator_next); |
| 51 | |
| 52 | static int is_fw_unit(struct device *dev); |
| 53 | |
Stefan Richter | 21ebcd1 | 2007-01-14 15:29:07 +0100 | [diff] [blame] | 54 | static int match_unit_directory(u32 * directory, const struct fw_device_id *id) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 55 | { |
| 56 | struct fw_csr_iterator ci; |
| 57 | int key, value, match; |
| 58 | |
| 59 | match = 0; |
| 60 | fw_csr_iterator_init(&ci, directory); |
| 61 | while (fw_csr_iterator_next(&ci, &key, &value)) { |
| 62 | if (key == CSR_VENDOR && value == id->vendor) |
| 63 | match |= FW_MATCH_VENDOR; |
| 64 | if (key == CSR_MODEL && value == id->model) |
| 65 | match |= FW_MATCH_MODEL; |
| 66 | if (key == CSR_SPECIFIER_ID && value == id->specifier_id) |
| 67 | match |= FW_MATCH_SPECIFIER_ID; |
| 68 | if (key == CSR_VERSION && value == id->version) |
| 69 | match |= FW_MATCH_VERSION; |
| 70 | } |
| 71 | |
| 72 | return (match & id->match_flags) == id->match_flags; |
| 73 | } |
| 74 | |
| 75 | static int fw_unit_match(struct device *dev, struct device_driver *drv) |
| 76 | { |
| 77 | struct fw_unit *unit = fw_unit(dev); |
| 78 | struct fw_driver *driver = fw_driver(drv); |
| 79 | int i; |
| 80 | |
| 81 | /* We only allow binding to fw_units. */ |
| 82 | if (!is_fw_unit(dev)) |
| 83 | return 0; |
| 84 | |
| 85 | for (i = 0; driver->id_table[i].match_flags != 0; i++) { |
| 86 | if (match_unit_directory(unit->directory, &driver->id_table[i])) |
| 87 | return 1; |
| 88 | } |
| 89 | |
| 90 | return 0; |
| 91 | } |
| 92 | |
| 93 | static int get_modalias(struct fw_unit *unit, char *buffer, size_t buffer_size) |
| 94 | { |
| 95 | struct fw_device *device = fw_device(unit->device.parent); |
| 96 | struct fw_csr_iterator ci; |
| 97 | |
| 98 | int key, value; |
| 99 | int vendor = 0; |
| 100 | int model = 0; |
| 101 | int specifier_id = 0; |
| 102 | int version = 0; |
| 103 | |
| 104 | fw_csr_iterator_init(&ci, &device->config_rom[5]); |
| 105 | while (fw_csr_iterator_next(&ci, &key, &value)) { |
| 106 | switch (key) { |
| 107 | case CSR_VENDOR: |
| 108 | vendor = value; |
| 109 | break; |
| 110 | case CSR_MODEL: |
| 111 | model = value; |
| 112 | break; |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | fw_csr_iterator_init(&ci, unit->directory); |
| 117 | while (fw_csr_iterator_next(&ci, &key, &value)) { |
| 118 | switch (key) { |
| 119 | case CSR_SPECIFIER_ID: |
| 120 | specifier_id = value; |
| 121 | break; |
| 122 | case CSR_VERSION: |
| 123 | version = value; |
| 124 | break; |
| 125 | } |
| 126 | } |
| 127 | |
| 128 | return snprintf(buffer, buffer_size, |
| 129 | "ieee1394:ven%08Xmo%08Xsp%08Xver%08X", |
| 130 | vendor, model, specifier_id, version); |
| 131 | } |
| 132 | |
| 133 | static int |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 134 | fw_unit_uevent(struct device *dev, struct kobj_uevent_env *env) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 135 | { |
| 136 | struct fw_unit *unit = fw_unit(dev); |
| 137 | char modalias[64]; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 138 | |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 139 | get_modalias(unit, modalias, sizeof(modalias)); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 140 | |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 141 | if (add_uevent_var(env, "MODALIAS=%s", modalias)) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 142 | return -ENOMEM; |
| 143 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 144 | return 0; |
| 145 | } |
| 146 | |
| 147 | struct bus_type fw_bus_type = { |
Kristian Høgsberg | 362c2c8 | 2007-02-06 14:49:37 -0500 | [diff] [blame] | 148 | .name = "firewire", |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 149 | .match = fw_unit_match, |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 150 | }; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 151 | EXPORT_SYMBOL(fw_bus_type); |
| 152 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 153 | static void fw_device_release(struct device *dev) |
| 154 | { |
| 155 | struct fw_device *device = fw_device(dev); |
Stefan Richter | 855c603 | 2008-02-27 22:14:27 +0100 | [diff] [blame] | 156 | struct fw_card *card = device->card; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 157 | unsigned long flags; |
| 158 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 159 | /* |
| 160 | * Take the card lock so we don't set this to NULL while a |
| 161 | * FW_NODE_UPDATED callback is being handled. |
| 162 | */ |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame^] | 163 | spin_lock_irqsave(&card->lock, flags); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 164 | device->node->data = NULL; |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame^] | 165 | spin_unlock_irqrestore(&card->lock, flags); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 166 | |
| 167 | fw_node_put(device->node); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 168 | kfree(device->config_rom); |
| 169 | kfree(device); |
Stefan Richter | 855c603 | 2008-02-27 22:14:27 +0100 | [diff] [blame] | 170 | atomic_dec(&card->device_count); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 171 | } |
| 172 | |
| 173 | int fw_device_enable_phys_dma(struct fw_device *device) |
| 174 | { |
Stefan Richter | b5d2a5e | 2008-01-25 18:57:41 +0100 | [diff] [blame] | 175 | int generation = device->generation; |
| 176 | |
| 177 | /* device->node_id, accessed below, must not be older than generation */ |
| 178 | smp_rmb(); |
| 179 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 180 | return device->card->driver->enable_phys_dma(device->card, |
| 181 | device->node_id, |
Stefan Richter | b5d2a5e | 2008-01-25 18:57:41 +0100 | [diff] [blame] | 182 | generation); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 183 | } |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 184 | EXPORT_SYMBOL(fw_device_enable_phys_dma); |
| 185 | |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 186 | struct config_rom_attribute { |
| 187 | struct device_attribute attr; |
| 188 | u32 key; |
| 189 | }; |
| 190 | |
| 191 | static ssize_t |
| 192 | show_immediate(struct device *dev, struct device_attribute *dattr, char *buf) |
| 193 | { |
| 194 | struct config_rom_attribute *attr = |
| 195 | container_of(dattr, struct config_rom_attribute, attr); |
| 196 | struct fw_csr_iterator ci; |
| 197 | u32 *dir; |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame^] | 198 | int key, value, ret = -ENOENT; |
| 199 | |
| 200 | down_read(&fw_device_rwsem); |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 201 | |
| 202 | if (is_fw_unit(dev)) |
| 203 | dir = fw_unit(dev)->directory; |
| 204 | else |
| 205 | dir = fw_device(dev)->config_rom + 5; |
| 206 | |
| 207 | fw_csr_iterator_init(&ci, dir); |
| 208 | while (fw_csr_iterator_next(&ci, &key, &value)) |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame^] | 209 | if (attr->key == key) { |
| 210 | ret = snprintf(buf, buf ? PAGE_SIZE : 0, |
| 211 | "0x%06x\n", value); |
| 212 | break; |
| 213 | } |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 214 | |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame^] | 215 | up_read(&fw_device_rwsem); |
| 216 | |
| 217 | return ret; |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 218 | } |
| 219 | |
| 220 | #define IMMEDIATE_ATTR(name, key) \ |
| 221 | { __ATTR(name, S_IRUGO, show_immediate, NULL), key } |
| 222 | |
| 223 | static ssize_t |
| 224 | show_text_leaf(struct device *dev, struct device_attribute *dattr, char *buf) |
| 225 | { |
| 226 | struct config_rom_attribute *attr = |
| 227 | container_of(dattr, struct config_rom_attribute, attr); |
| 228 | struct fw_csr_iterator ci; |
| 229 | u32 *dir, *block = NULL, *p, *end; |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame^] | 230 | int length, key, value, last_key = 0, ret = -ENOENT; |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 231 | char *b; |
| 232 | |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame^] | 233 | down_read(&fw_device_rwsem); |
| 234 | |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 235 | if (is_fw_unit(dev)) |
| 236 | dir = fw_unit(dev)->directory; |
| 237 | else |
| 238 | dir = fw_device(dev)->config_rom + 5; |
| 239 | |
| 240 | fw_csr_iterator_init(&ci, dir); |
| 241 | while (fw_csr_iterator_next(&ci, &key, &value)) { |
| 242 | if (attr->key == last_key && |
| 243 | key == (CSR_DESCRIPTOR | CSR_LEAF)) |
| 244 | block = ci.p - 1 + value; |
| 245 | last_key = key; |
| 246 | } |
| 247 | |
| 248 | if (block == NULL) |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame^] | 249 | goto out; |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 250 | |
| 251 | length = min(block[0] >> 16, 256U); |
| 252 | if (length < 3) |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame^] | 253 | goto out; |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 254 | |
| 255 | if (block[1] != 0 || block[2] != 0) |
| 256 | /* Unknown encoding. */ |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame^] | 257 | goto out; |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 258 | |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame^] | 259 | if (buf == NULL) { |
| 260 | ret = length * 4; |
| 261 | goto out; |
| 262 | } |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 263 | |
| 264 | b = buf; |
| 265 | end = &block[length + 1]; |
| 266 | for (p = &block[3]; p < end; p++, b += 4) |
| 267 | * (u32 *) b = (__force u32) __cpu_to_be32(*p); |
| 268 | |
| 269 | /* Strip trailing whitespace and add newline. */ |
| 270 | while (b--, (isspace(*b) || *b == '\0') && b > buf); |
| 271 | strcpy(b + 1, "\n"); |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame^] | 272 | ret = b + 2 - buf; |
| 273 | out: |
| 274 | up_read(&fw_device_rwsem); |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 275 | |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame^] | 276 | return ret; |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 277 | } |
| 278 | |
| 279 | #define TEXT_LEAF_ATTR(name, key) \ |
| 280 | { __ATTR(name, S_IRUGO, show_text_leaf, NULL), key } |
| 281 | |
| 282 | static struct config_rom_attribute config_rom_attributes[] = { |
| 283 | IMMEDIATE_ATTR(vendor, CSR_VENDOR), |
| 284 | IMMEDIATE_ATTR(hardware_version, CSR_HARDWARE_VERSION), |
| 285 | IMMEDIATE_ATTR(specifier_id, CSR_SPECIFIER_ID), |
| 286 | IMMEDIATE_ATTR(version, CSR_VERSION), |
| 287 | IMMEDIATE_ATTR(model, CSR_MODEL), |
| 288 | TEXT_LEAF_ATTR(vendor_name, CSR_VENDOR), |
| 289 | TEXT_LEAF_ATTR(model_name, CSR_MODEL), |
| 290 | TEXT_LEAF_ATTR(hardware_version_name, CSR_HARDWARE_VERSION), |
| 291 | }; |
| 292 | |
| 293 | static void |
Kristian Høgsberg | 6f2e53d | 2007-03-27 19:35:13 -0400 | [diff] [blame] | 294 | init_fw_attribute_group(struct device *dev, |
| 295 | struct device_attribute *attrs, |
| 296 | struct fw_attribute_group *group) |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 297 | { |
| 298 | struct device_attribute *attr; |
Kristian Høgsberg | 6f2e53d | 2007-03-27 19:35:13 -0400 | [diff] [blame] | 299 | int i, j; |
| 300 | |
| 301 | for (j = 0; attrs[j].attr.name != NULL; j++) |
| 302 | group->attrs[j] = &attrs[j].attr; |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 303 | |
| 304 | for (i = 0; i < ARRAY_SIZE(config_rom_attributes); i++) { |
| 305 | attr = &config_rom_attributes[i].attr; |
| 306 | if (attr->show(dev, attr, NULL) < 0) |
| 307 | continue; |
Kristian Høgsberg | 6f2e53d | 2007-03-27 19:35:13 -0400 | [diff] [blame] | 308 | group->attrs[j++] = &attr->attr; |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 309 | } |
| 310 | |
Kristian Høgsberg | 6f2e53d | 2007-03-27 19:35:13 -0400 | [diff] [blame] | 311 | BUG_ON(j >= ARRAY_SIZE(group->attrs)); |
| 312 | group->attrs[j++] = NULL; |
| 313 | group->groups[0] = &group->group; |
| 314 | group->groups[1] = NULL; |
| 315 | group->group.attrs = group->attrs; |
| 316 | dev->groups = group->groups; |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 317 | } |
| 318 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 319 | static ssize_t |
Kristian Høgsberg | 21351db | 2007-03-20 20:58:33 -0400 | [diff] [blame] | 320 | modalias_show(struct device *dev, |
| 321 | struct device_attribute *attr, char *buf) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 322 | { |
| 323 | struct fw_unit *unit = fw_unit(dev); |
| 324 | int length; |
| 325 | |
| 326 | length = get_modalias(unit, buf, PAGE_SIZE); |
| 327 | strcpy(buf + length, "\n"); |
| 328 | |
| 329 | return length + 1; |
| 330 | } |
| 331 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 332 | static ssize_t |
Kristian Høgsberg | 21351db | 2007-03-20 20:58:33 -0400 | [diff] [blame] | 333 | rom_index_show(struct device *dev, |
| 334 | struct device_attribute *attr, char *buf) |
Kristian Høgsberg | 048961e | 2007-03-07 12:12:46 -0500 | [diff] [blame] | 335 | { |
| 336 | struct fw_device *device = fw_device(dev->parent); |
| 337 | struct fw_unit *unit = fw_unit(dev); |
| 338 | |
| 339 | return snprintf(buf, PAGE_SIZE, "%d\n", |
Stefan Richter | d84702a | 2007-03-20 19:42:15 +0100 | [diff] [blame] | 340 | (int)(unit->directory - device->config_rom)); |
Kristian Høgsberg | 048961e | 2007-03-07 12:12:46 -0500 | [diff] [blame] | 341 | } |
| 342 | |
Kristian Høgsberg | 21351db | 2007-03-20 20:58:33 -0400 | [diff] [blame] | 343 | static struct device_attribute fw_unit_attributes[] = { |
| 344 | __ATTR_RO(modalias), |
| 345 | __ATTR_RO(rom_index), |
| 346 | __ATTR_NULL, |
| 347 | }; |
| 348 | |
| 349 | static ssize_t |
Kristian Høgsberg | bbd1494 | 2007-03-20 20:58:35 -0400 | [diff] [blame] | 350 | config_rom_show(struct device *dev, struct device_attribute *attr, char *buf) |
Kristian Høgsberg | 21351db | 2007-03-20 20:58:33 -0400 | [diff] [blame] | 351 | { |
| 352 | struct fw_device *device = fw_device(dev); |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame^] | 353 | size_t length; |
Kristian Høgsberg | 21351db | 2007-03-20 20:58:33 -0400 | [diff] [blame] | 354 | |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame^] | 355 | down_read(&fw_device_rwsem); |
| 356 | length = device->config_rom_length * 4; |
| 357 | memcpy(buf, device->config_rom, length); |
| 358 | up_read(&fw_device_rwsem); |
Kristian Høgsberg | 21351db | 2007-03-20 20:58:33 -0400 | [diff] [blame] | 359 | |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame^] | 360 | return length; |
Kristian Høgsberg | 21351db | 2007-03-20 20:58:33 -0400 | [diff] [blame] | 361 | } |
| 362 | |
Kristian Høgsberg | bbd1494 | 2007-03-20 20:58:35 -0400 | [diff] [blame] | 363 | static ssize_t |
| 364 | guid_show(struct device *dev, struct device_attribute *attr, char *buf) |
| 365 | { |
| 366 | struct fw_device *device = fw_device(dev); |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame^] | 367 | int ret; |
Kristian Høgsberg | bbd1494 | 2007-03-20 20:58:35 -0400 | [diff] [blame] | 368 | |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame^] | 369 | down_read(&fw_device_rwsem); |
| 370 | ret = snprintf(buf, PAGE_SIZE, "0x%08x%08x\n", |
| 371 | device->config_rom[3], device->config_rom[4]); |
| 372 | up_read(&fw_device_rwsem); |
| 373 | |
| 374 | return ret; |
Kristian Høgsberg | bbd1494 | 2007-03-20 20:58:35 -0400 | [diff] [blame] | 375 | } |
| 376 | |
Kristian Høgsberg | 21351db | 2007-03-20 20:58:33 -0400 | [diff] [blame] | 377 | static struct device_attribute fw_device_attributes[] = { |
| 378 | __ATTR_RO(config_rom), |
Kristian Høgsberg | bbd1494 | 2007-03-20 20:58:35 -0400 | [diff] [blame] | 379 | __ATTR_RO(guid), |
Kristian Høgsberg | 21351db | 2007-03-20 20:58:33 -0400 | [diff] [blame] | 380 | __ATTR_NULL, |
Kristian Høgsberg | 048961e | 2007-03-07 12:12:46 -0500 | [diff] [blame] | 381 | }; |
| 382 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 383 | struct read_quadlet_callback_data { |
| 384 | struct completion done; |
| 385 | int rcode; |
| 386 | u32 data; |
| 387 | }; |
| 388 | |
| 389 | static void |
| 390 | complete_transaction(struct fw_card *card, int rcode, |
| 391 | void *payload, size_t length, void *data) |
| 392 | { |
| 393 | struct read_quadlet_callback_data *callback_data = data; |
| 394 | |
| 395 | if (rcode == RCODE_COMPLETE) |
| 396 | callback_data->data = be32_to_cpu(*(__be32 *)payload); |
| 397 | callback_data->rcode = rcode; |
| 398 | complete(&callback_data->done); |
| 399 | } |
| 400 | |
Stefan Richter | f8d2dc3 | 2008-01-25 17:53:49 +0100 | [diff] [blame] | 401 | static int |
| 402 | read_rom(struct fw_device *device, int generation, int index, u32 *data) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 403 | { |
| 404 | struct read_quadlet_callback_data callback_data; |
| 405 | struct fw_transaction t; |
| 406 | u64 offset; |
Stefan Richter | b5d2a5e | 2008-01-25 18:57:41 +0100 | [diff] [blame] | 407 | |
| 408 | /* device->node_id, accessed below, must not be older than generation */ |
| 409 | smp_rmb(); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 410 | |
| 411 | init_completion(&callback_data.done); |
| 412 | |
| 413 | offset = 0xfffff0000400ULL + index * 4; |
| 414 | fw_send_request(device->card, &t, TCODE_READ_QUADLET_REQUEST, |
Stefan Richter | b5d2a5e | 2008-01-25 18:57:41 +0100 | [diff] [blame] | 415 | device->node_id, generation, device->max_speed, |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 416 | offset, NULL, 4, complete_transaction, &callback_data); |
| 417 | |
| 418 | wait_for_completion(&callback_data.done); |
| 419 | |
| 420 | *data = callback_data.data; |
| 421 | |
| 422 | return callback_data.rcode; |
| 423 | } |
| 424 | |
Stefan Richter | 1dadff7 | 2008-03-02 19:35:42 +0100 | [diff] [blame] | 425 | #define READ_BIB_ROM_SIZE 256 |
| 426 | #define READ_BIB_STACK_SIZE 16 |
| 427 | |
Stefan Richter | f8d2dc3 | 2008-01-25 17:53:49 +0100 | [diff] [blame] | 428 | /* |
| 429 | * Read the bus info block, perform a speed probe, and read all of the rest of |
| 430 | * the config ROM. We do all this with a cached bus generation. If the bus |
| 431 | * generation changes under us, read_bus_info_block will fail and get retried. |
| 432 | * It's better to start all over in this case because the node from which we |
| 433 | * are reading the ROM may have changed the ROM during the reset. |
| 434 | */ |
| 435 | static int read_bus_info_block(struct fw_device *device, int generation) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 436 | { |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame^] | 437 | u32 *rom, *stack, *old_rom, *new_rom; |
Stefan Richter | 1dadff7 | 2008-03-02 19:35:42 +0100 | [diff] [blame] | 438 | u32 sp, key; |
| 439 | int i, end, length, ret = -1; |
| 440 | |
| 441 | rom = kmalloc(sizeof(*rom) * READ_BIB_ROM_SIZE + |
| 442 | sizeof(*stack) * READ_BIB_STACK_SIZE, GFP_KERNEL); |
| 443 | if (rom == NULL) |
| 444 | return -ENOMEM; |
| 445 | |
| 446 | stack = &rom[READ_BIB_ROM_SIZE]; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 447 | |
Stefan Richter | f139749 | 2007-06-10 21:31:36 +0200 | [diff] [blame] | 448 | device->max_speed = SCODE_100; |
| 449 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 450 | /* First read the bus info block. */ |
| 451 | for (i = 0; i < 5; i++) { |
Stefan Richter | f8d2dc3 | 2008-01-25 17:53:49 +0100 | [diff] [blame] | 452 | if (read_rom(device, generation, i, &rom[i]) != RCODE_COMPLETE) |
Stefan Richter | 1dadff7 | 2008-03-02 19:35:42 +0100 | [diff] [blame] | 453 | goto out; |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 454 | /* |
| 455 | * As per IEEE1212 7.2, during power-up, devices can |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 456 | * reply with a 0 for the first quadlet of the config |
| 457 | * rom to indicate that they are booting (for example, |
| 458 | * if the firmware is on the disk of a external |
| 459 | * harddisk). In that case we just fail, and the |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 460 | * retry mechanism will try again later. |
| 461 | */ |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 462 | if (i == 0 && rom[i] == 0) |
Stefan Richter | 1dadff7 | 2008-03-02 19:35:42 +0100 | [diff] [blame] | 463 | goto out; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 464 | } |
| 465 | |
Stefan Richter | f139749 | 2007-06-10 21:31:36 +0200 | [diff] [blame] | 466 | device->max_speed = device->node->max_speed; |
| 467 | |
| 468 | /* |
| 469 | * Determine the speed of |
| 470 | * - devices with link speed less than PHY speed, |
| 471 | * - devices with 1394b PHY (unless only connected to 1394a PHYs), |
| 472 | * - all devices if there are 1394b repeaters. |
| 473 | * Note, we cannot use the bus info block's link_spd as starting point |
| 474 | * because some buggy firmwares set it lower than necessary and because |
| 475 | * 1394-1995 nodes do not have the field. |
| 476 | */ |
| 477 | if ((rom[2] & 0x7) < device->max_speed || |
| 478 | device->max_speed == SCODE_BETA || |
| 479 | device->card->beta_repeaters_present) { |
| 480 | u32 dummy; |
| 481 | |
| 482 | /* for S1600 and S3200 */ |
| 483 | if (device->max_speed == SCODE_BETA) |
| 484 | device->max_speed = device->card->link_speed; |
| 485 | |
| 486 | while (device->max_speed > SCODE_100) { |
Stefan Richter | f8d2dc3 | 2008-01-25 17:53:49 +0100 | [diff] [blame] | 487 | if (read_rom(device, generation, 0, &dummy) == |
| 488 | RCODE_COMPLETE) |
Stefan Richter | f139749 | 2007-06-10 21:31:36 +0200 | [diff] [blame] | 489 | break; |
| 490 | device->max_speed--; |
| 491 | } |
| 492 | } |
| 493 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 494 | /* |
| 495 | * Now parse the config rom. The config rom is a recursive |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 496 | * directory structure so we parse it using a stack of |
| 497 | * references to the blocks that make up the structure. We |
| 498 | * push a reference to the root directory on the stack to |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 499 | * start things off. |
| 500 | */ |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 501 | length = i; |
| 502 | sp = 0; |
| 503 | stack[sp++] = 0xc0000005; |
| 504 | while (sp > 0) { |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 505 | /* |
| 506 | * Pop the next block reference of the stack. The |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 507 | * lower 24 bits is the offset into the config rom, |
| 508 | * the upper 8 bits are the type of the reference the |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 509 | * block. |
| 510 | */ |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 511 | key = stack[--sp]; |
| 512 | i = key & 0xffffff; |
Stefan Richter | 1dadff7 | 2008-03-02 19:35:42 +0100 | [diff] [blame] | 513 | if (i >= READ_BIB_ROM_SIZE) |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 514 | /* |
| 515 | * The reference points outside the standard |
| 516 | * config rom area, something's fishy. |
| 517 | */ |
Stefan Richter | 1dadff7 | 2008-03-02 19:35:42 +0100 | [diff] [blame] | 518 | goto out; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 519 | |
| 520 | /* Read header quadlet for the block to get the length. */ |
Stefan Richter | f8d2dc3 | 2008-01-25 17:53:49 +0100 | [diff] [blame] | 521 | if (read_rom(device, generation, i, &rom[i]) != RCODE_COMPLETE) |
Stefan Richter | 1dadff7 | 2008-03-02 19:35:42 +0100 | [diff] [blame] | 522 | goto out; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 523 | end = i + (rom[i] >> 16) + 1; |
| 524 | i++; |
Stefan Richter | 1dadff7 | 2008-03-02 19:35:42 +0100 | [diff] [blame] | 525 | if (end > READ_BIB_ROM_SIZE) |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 526 | /* |
| 527 | * This block extends outside standard config |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 528 | * area (and the array we're reading it |
| 529 | * into). That's broken, so ignore this |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 530 | * device. |
| 531 | */ |
Stefan Richter | 1dadff7 | 2008-03-02 19:35:42 +0100 | [diff] [blame] | 532 | goto out; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 533 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 534 | /* |
| 535 | * Now read in the block. If this is a directory |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 536 | * block, check the entries as we read them to see if |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 537 | * it references another block, and push it in that case. |
| 538 | */ |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 539 | while (i < end) { |
Stefan Richter | f8d2dc3 | 2008-01-25 17:53:49 +0100 | [diff] [blame] | 540 | if (read_rom(device, generation, i, &rom[i]) != |
| 541 | RCODE_COMPLETE) |
Stefan Richter | 1dadff7 | 2008-03-02 19:35:42 +0100 | [diff] [blame] | 542 | goto out; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 543 | if ((key >> 30) == 3 && (rom[i] >> 30) > 1 && |
Stefan Richter | 1dadff7 | 2008-03-02 19:35:42 +0100 | [diff] [blame] | 544 | sp < READ_BIB_STACK_SIZE) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 545 | stack[sp++] = i + rom[i]; |
| 546 | i++; |
| 547 | } |
| 548 | if (length < i) |
| 549 | length = i; |
| 550 | } |
| 551 | |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame^] | 552 | old_rom = device->config_rom; |
| 553 | new_rom = kmemdup(rom, length * 4, GFP_KERNEL); |
| 554 | if (new_rom == NULL) |
Stefan Richter | 1dadff7 | 2008-03-02 19:35:42 +0100 | [diff] [blame] | 555 | goto out; |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame^] | 556 | |
| 557 | down_write(&fw_device_rwsem); |
| 558 | device->config_rom = new_rom; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 559 | device->config_rom_length = length; |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame^] | 560 | up_write(&fw_device_rwsem); |
| 561 | |
| 562 | kfree(old_rom); |
Stefan Richter | 1dadff7 | 2008-03-02 19:35:42 +0100 | [diff] [blame] | 563 | ret = 0; |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame^] | 564 | device->cmc = rom[2] & 1 << 30; |
Stefan Richter | 1dadff7 | 2008-03-02 19:35:42 +0100 | [diff] [blame] | 565 | out: |
| 566 | kfree(rom); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 567 | |
Stefan Richter | 1dadff7 | 2008-03-02 19:35:42 +0100 | [diff] [blame] | 568 | return ret; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 569 | } |
| 570 | |
| 571 | static void fw_unit_release(struct device *dev) |
| 572 | { |
| 573 | struct fw_unit *unit = fw_unit(dev); |
| 574 | |
| 575 | kfree(unit); |
| 576 | } |
| 577 | |
Kristian Høgsberg | 21351db | 2007-03-20 20:58:33 -0400 | [diff] [blame] | 578 | static struct device_type fw_unit_type = { |
Kristian Høgsberg | 21351db | 2007-03-20 20:58:33 -0400 | [diff] [blame] | 579 | .uevent = fw_unit_uevent, |
| 580 | .release = fw_unit_release, |
| 581 | }; |
| 582 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 583 | static int is_fw_unit(struct device *dev) |
| 584 | { |
Kristian Høgsberg | 21351db | 2007-03-20 20:58:33 -0400 | [diff] [blame] | 585 | return dev->type == &fw_unit_type; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 586 | } |
| 587 | |
| 588 | static void create_units(struct fw_device *device) |
| 589 | { |
| 590 | struct fw_csr_iterator ci; |
| 591 | struct fw_unit *unit; |
| 592 | int key, value, i; |
| 593 | |
| 594 | i = 0; |
| 595 | fw_csr_iterator_init(&ci, &device->config_rom[5]); |
| 596 | while (fw_csr_iterator_next(&ci, &key, &value)) { |
| 597 | if (key != (CSR_UNIT | CSR_DIRECTORY)) |
| 598 | continue; |
| 599 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 600 | /* |
| 601 | * Get the address of the unit directory and try to |
| 602 | * match the drivers id_tables against it. |
| 603 | */ |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 604 | unit = kzalloc(sizeof(*unit), GFP_KERNEL); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 605 | if (unit == NULL) { |
| 606 | fw_error("failed to allocate memory for unit\n"); |
| 607 | continue; |
| 608 | } |
| 609 | |
| 610 | unit->directory = ci.p + value - 1; |
| 611 | unit->device.bus = &fw_bus_type; |
Kristian Høgsberg | 21351db | 2007-03-20 20:58:33 -0400 | [diff] [blame] | 612 | unit->device.type = &fw_unit_type; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 613 | unit->device.parent = &device->device; |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 614 | snprintf(unit->device.bus_id, sizeof(unit->device.bus_id), |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 615 | "%s.%d", device->device.bus_id, i++); |
| 616 | |
Kristian Høgsberg | 6f2e53d | 2007-03-27 19:35:13 -0400 | [diff] [blame] | 617 | init_fw_attribute_group(&unit->device, |
| 618 | fw_unit_attributes, |
| 619 | &unit->attribute_group); |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 620 | if (device_register(&unit->device) < 0) |
| 621 | goto skip_unit; |
| 622 | |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 623 | continue; |
| 624 | |
Kristian Høgsberg | 7feb9cc | 2007-03-21 10:55:19 -0400 | [diff] [blame] | 625 | skip_unit: |
| 626 | kfree(unit); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 627 | } |
| 628 | } |
| 629 | |
| 630 | static int shutdown_unit(struct device *device, void *data) |
| 631 | { |
Kristian Høgsberg | 21351db | 2007-03-20 20:58:33 -0400 | [diff] [blame] | 632 | device_unregister(device); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 633 | |
| 634 | return 0; |
| 635 | } |
| 636 | |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame^] | 637 | /* |
| 638 | * fw_device_rwsem acts as dual purpose mutex: |
| 639 | * - serializes accesses to fw_device_idr, |
| 640 | * - serializes accesses to fw_device.config_rom/.config_rom_length and |
| 641 | * fw_unit.directory, unless those accesses happen at safe occasions |
| 642 | */ |
| 643 | DECLARE_RWSEM(fw_device_rwsem); |
| 644 | |
Kristian Høgsberg | a3aca3d | 2007-03-07 12:12:44 -0500 | [diff] [blame] | 645 | static DEFINE_IDR(fw_device_idr); |
| 646 | int fw_cdev_major; |
| 647 | |
Stefan Richter | 96b1906 | 2008-02-02 15:01:09 +0100 | [diff] [blame] | 648 | struct fw_device *fw_device_get_by_devt(dev_t devt) |
Kristian Høgsberg | a3aca3d | 2007-03-07 12:12:44 -0500 | [diff] [blame] | 649 | { |
| 650 | struct fw_device *device; |
| 651 | |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame^] | 652 | down_read(&fw_device_rwsem); |
Kristian Høgsberg | a3aca3d | 2007-03-07 12:12:44 -0500 | [diff] [blame] | 653 | device = idr_find(&fw_device_idr, MINOR(devt)); |
Stefan Richter | 96b1906 | 2008-02-02 15:01:09 +0100 | [diff] [blame] | 654 | if (device) |
| 655 | fw_device_get(device); |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame^] | 656 | up_read(&fw_device_rwsem); |
Kristian Høgsberg | a3aca3d | 2007-03-07 12:12:44 -0500 | [diff] [blame] | 657 | |
| 658 | return device; |
| 659 | } |
| 660 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 661 | static void fw_device_shutdown(struct work_struct *work) |
| 662 | { |
| 663 | struct fw_device *device = |
| 664 | container_of(work, struct fw_device, work.work); |
Kristian Høgsberg | a3aca3d | 2007-03-07 12:12:44 -0500 | [diff] [blame] | 665 | int minor = MINOR(device->device.devt); |
| 666 | |
Kristian Høgsberg | 2603bf2 | 2007-03-07 12:12:48 -0500 | [diff] [blame] | 667 | fw_device_cdev_remove(device); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 668 | device_for_each_child(&device->device, NULL, shutdown_unit); |
| 669 | device_unregister(&device->device); |
Stefan Richter | 96b1906 | 2008-02-02 15:01:09 +0100 | [diff] [blame] | 670 | |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame^] | 671 | down_write(&fw_device_rwsem); |
Stefan Richter | 96b1906 | 2008-02-02 15:01:09 +0100 | [diff] [blame] | 672 | idr_remove(&fw_device_idr, minor); |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame^] | 673 | up_write(&fw_device_rwsem); |
Stefan Richter | 96b1906 | 2008-02-02 15:01:09 +0100 | [diff] [blame] | 674 | fw_device_put(device); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 675 | } |
| 676 | |
Kristian Høgsberg | 21351db | 2007-03-20 20:58:33 -0400 | [diff] [blame] | 677 | static struct device_type fw_device_type = { |
Kristian Høgsberg | 21351db | 2007-03-20 20:58:33 -0400 | [diff] [blame] | 678 | .release = fw_device_release, |
| 679 | }; |
| 680 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 681 | /* |
| 682 | * These defines control the retry behavior for reading the config |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 683 | * rom. It shouldn't be necessary to tweak these; if the device |
| 684 | * doesn't respond to a config rom read within 10 seconds, it's not |
| 685 | * going to respond at all. As for the initial delay, a lot of |
| 686 | * devices will be able to respond within half a second after bus |
| 687 | * reset. On the other hand, it's not really worth being more |
| 688 | * aggressive than that, since it scales pretty well; if 10 devices |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 689 | * are plugged in, they're all getting read within one second. |
| 690 | */ |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 691 | |
Kristian Høgsberg | c5dfd0a | 2007-03-27 01:43:43 -0400 | [diff] [blame] | 692 | #define MAX_RETRIES 10 |
| 693 | #define RETRY_DELAY (3 * HZ) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 694 | #define INITIAL_DELAY (HZ / 2) |
| 695 | |
| 696 | static void fw_device_init(struct work_struct *work) |
| 697 | { |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 698 | struct fw_device *device = |
| 699 | container_of(work, struct fw_device, work.work); |
Kristian Høgsberg | a3aca3d | 2007-03-07 12:12:44 -0500 | [diff] [blame] | 700 | int minor, err; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 701 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 702 | /* |
| 703 | * All failure paths here set node->data to NULL, so that we |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 704 | * don't try to do device_for_each_child() on a kfree()'d |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 705 | * device. |
| 706 | */ |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 707 | |
Stefan Richter | f8d2dc3 | 2008-01-25 17:53:49 +0100 | [diff] [blame] | 708 | if (read_bus_info_block(device, device->generation) < 0) { |
Stefan Richter | 855c603 | 2008-02-27 22:14:27 +0100 | [diff] [blame] | 709 | if (device->config_rom_retries < MAX_RETRIES && |
| 710 | atomic_read(&device->state) == FW_DEVICE_INITIALIZING) { |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 711 | device->config_rom_retries++; |
| 712 | schedule_delayed_work(&device->work, RETRY_DELAY); |
| 713 | } else { |
Stefan Richter | 907293d | 2007-01-23 21:11:43 +0100 | [diff] [blame] | 714 | fw_notify("giving up on config rom for node id %x\n", |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 715 | device->node_id); |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 716 | if (device->node == device->card->root_node) |
| 717 | schedule_delayed_work(&device->card->work, 0); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 718 | fw_device_release(&device->device); |
| 719 | } |
| 720 | return; |
| 721 | } |
| 722 | |
Kristian Høgsberg | a3aca3d | 2007-03-07 12:12:44 -0500 | [diff] [blame] | 723 | err = -ENOMEM; |
Stefan Richter | 96b1906 | 2008-02-02 15:01:09 +0100 | [diff] [blame] | 724 | |
| 725 | fw_device_get(device); |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame^] | 726 | down_write(&fw_device_rwsem); |
Kristian Høgsberg | a3aca3d | 2007-03-07 12:12:44 -0500 | [diff] [blame] | 727 | if (idr_pre_get(&fw_device_idr, GFP_KERNEL)) |
| 728 | err = idr_get_new(&fw_device_idr, device, &minor); |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame^] | 729 | up_write(&fw_device_rwsem); |
Stefan Richter | 96b1906 | 2008-02-02 15:01:09 +0100 | [diff] [blame] | 730 | |
Kristian Høgsberg | a3aca3d | 2007-03-07 12:12:44 -0500 | [diff] [blame] | 731 | if (err < 0) |
| 732 | goto error; |
| 733 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 734 | device->device.bus = &fw_bus_type; |
Kristian Høgsberg | 21351db | 2007-03-20 20:58:33 -0400 | [diff] [blame] | 735 | device->device.type = &fw_device_type; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 736 | device->device.parent = device->card->device; |
Kristian Høgsberg | a3aca3d | 2007-03-07 12:12:44 -0500 | [diff] [blame] | 737 | device->device.devt = MKDEV(fw_cdev_major, minor); |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 738 | snprintf(device->device.bus_id, sizeof(device->device.bus_id), |
Kristian Høgsberg | a3aca3d | 2007-03-07 12:12:44 -0500 | [diff] [blame] | 739 | "fw%d", minor); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 740 | |
Kristian Høgsberg | 6f2e53d | 2007-03-27 19:35:13 -0400 | [diff] [blame] | 741 | init_fw_attribute_group(&device->device, |
| 742 | fw_device_attributes, |
| 743 | &device->attribute_group); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 744 | if (device_add(&device->device)) { |
| 745 | fw_error("Failed to add device.\n"); |
Kristian Høgsberg | a3aca3d | 2007-03-07 12:12:44 -0500 | [diff] [blame] | 746 | goto error_with_cdev; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 747 | } |
| 748 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 749 | create_units(device); |
| 750 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 751 | /* |
| 752 | * Transition the device to running state. If it got pulled |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 753 | * out from under us while we did the intialization work, we |
| 754 | * have to shut down the device again here. Normally, though, |
| 755 | * fw_node_event will be responsible for shutting it down when |
| 756 | * necessary. We have to use the atomic cmpxchg here to avoid |
| 757 | * racing with the FW_NODE_DESTROYED case in |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 758 | * fw_node_event(). |
| 759 | */ |
Stefan Richter | 641f879 | 2007-01-27 10:34:55 +0100 | [diff] [blame] | 760 | if (atomic_cmpxchg(&device->state, |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 761 | FW_DEVICE_INITIALIZING, |
Stefan Richter | fa6e697 | 2008-02-03 23:03:00 +0100 | [diff] [blame] | 762 | FW_DEVICE_RUNNING) == FW_DEVICE_SHUTDOWN) { |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame^] | 763 | fw_device_shutdown(work); |
Stefan Richter | fa6e697 | 2008-02-03 23:03:00 +0100 | [diff] [blame] | 764 | } else { |
| 765 | if (device->config_rom_retries) |
| 766 | fw_notify("created device %s: GUID %08x%08x, S%d00, " |
| 767 | "%d config ROM retries\n", |
| 768 | device->device.bus_id, |
| 769 | device->config_rom[3], device->config_rom[4], |
| 770 | 1 << device->max_speed, |
| 771 | device->config_rom_retries); |
| 772 | else |
| 773 | fw_notify("created device %s: GUID %08x%08x, S%d00\n", |
| 774 | device->device.bus_id, |
| 775 | device->config_rom[3], device->config_rom[4], |
| 776 | 1 << device->max_speed); |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame^] | 777 | device->config_rom_retries = 0; |
Stefan Richter | fa6e697 | 2008-02-03 23:03:00 +0100 | [diff] [blame] | 778 | } |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 779 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 780 | /* |
| 781 | * Reschedule the IRM work if we just finished reading the |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 782 | * root node config rom. If this races with a bus reset we |
| 783 | * just end up running the IRM work a couple of extra times - |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 784 | * pretty harmless. |
| 785 | */ |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 786 | if (device->node == device->card->root_node) |
| 787 | schedule_delayed_work(&device->card->work, 0); |
| 788 | |
| 789 | return; |
| 790 | |
Kristian Høgsberg | a3aca3d | 2007-03-07 12:12:44 -0500 | [diff] [blame] | 791 | error_with_cdev: |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame^] | 792 | down_write(&fw_device_rwsem); |
Kristian Høgsberg | a3aca3d | 2007-03-07 12:12:44 -0500 | [diff] [blame] | 793 | idr_remove(&fw_device_idr, minor); |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame^] | 794 | up_write(&fw_device_rwsem); |
Stefan Richter | 373b2ed | 2007-03-04 14:45:18 +0100 | [diff] [blame] | 795 | error: |
Stefan Richter | 96b1906 | 2008-02-02 15:01:09 +0100 | [diff] [blame] | 796 | fw_device_put(device); /* fw_device_idr's reference */ |
| 797 | |
| 798 | put_device(&device->device); /* our reference */ |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 799 | } |
| 800 | |
| 801 | static int update_unit(struct device *dev, void *data) |
| 802 | { |
| 803 | struct fw_unit *unit = fw_unit(dev); |
| 804 | struct fw_driver *driver = (struct fw_driver *)dev->driver; |
| 805 | |
Kristian Høgsberg | 015b066 | 2007-03-19 11:37:16 -0400 | [diff] [blame] | 806 | if (is_fw_unit(dev) && driver != NULL && driver->update != NULL) { |
| 807 | down(&dev->sem); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 808 | driver->update(unit); |
Kristian Høgsberg | 015b066 | 2007-03-19 11:37:16 -0400 | [diff] [blame] | 809 | up(&dev->sem); |
| 810 | } |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 811 | |
| 812 | return 0; |
| 813 | } |
| 814 | |
Kristian Høgsberg | 5f48047 | 2007-03-07 12:12:39 -0500 | [diff] [blame] | 815 | static void fw_device_update(struct work_struct *work) |
| 816 | { |
| 817 | struct fw_device *device = |
| 818 | container_of(work, struct fw_device, work.work); |
| 819 | |
Kristian Høgsberg | 97bd9ef | 2007-03-07 12:12:41 -0500 | [diff] [blame] | 820 | fw_device_cdev_update(device); |
Kristian Høgsberg | 5f48047 | 2007-03-07 12:12:39 -0500 | [diff] [blame] | 821 | device_for_each_child(&device->device, NULL, update_unit); |
| 822 | } |
| 823 | |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame^] | 824 | enum { |
| 825 | REREAD_BIB_ERROR, |
| 826 | REREAD_BIB_GONE, |
| 827 | REREAD_BIB_UNCHANGED, |
| 828 | REREAD_BIB_CHANGED, |
| 829 | }; |
| 830 | |
| 831 | /* Reread and compare bus info block and header of root directory */ |
| 832 | static int reread_bus_info_block(struct fw_device *device, int generation) |
| 833 | { |
| 834 | u32 q; |
| 835 | int i; |
| 836 | |
| 837 | for (i = 0; i < 6; i++) { |
| 838 | if (read_rom(device, generation, i, &q) != RCODE_COMPLETE) |
| 839 | return REREAD_BIB_ERROR; |
| 840 | |
| 841 | if (i == 0 && q == 0) |
| 842 | return REREAD_BIB_GONE; |
| 843 | |
| 844 | if (i > device->config_rom_length || q != device->config_rom[i]) |
| 845 | return REREAD_BIB_CHANGED; |
| 846 | } |
| 847 | |
| 848 | return REREAD_BIB_UNCHANGED; |
| 849 | } |
| 850 | |
| 851 | static void fw_device_refresh(struct work_struct *work) |
| 852 | { |
| 853 | struct fw_device *device = |
| 854 | container_of(work, struct fw_device, work.work); |
| 855 | struct fw_card *card = device->card; |
| 856 | int node_id = device->node_id; |
| 857 | |
| 858 | switch (reread_bus_info_block(device, device->generation)) { |
| 859 | case REREAD_BIB_ERROR: |
| 860 | if (device->config_rom_retries < MAX_RETRIES / 2 && |
| 861 | atomic_read(&device->state) == FW_DEVICE_INITIALIZING) { |
| 862 | device->config_rom_retries++; |
| 863 | schedule_delayed_work(&device->work, RETRY_DELAY / 2); |
| 864 | |
| 865 | return; |
| 866 | } |
| 867 | goto give_up; |
| 868 | |
| 869 | case REREAD_BIB_GONE: |
| 870 | goto gone; |
| 871 | |
| 872 | case REREAD_BIB_UNCHANGED: |
| 873 | if (atomic_cmpxchg(&device->state, |
| 874 | FW_DEVICE_INITIALIZING, |
| 875 | FW_DEVICE_RUNNING) == FW_DEVICE_SHUTDOWN) |
| 876 | goto gone; |
| 877 | |
| 878 | fw_device_update(work); |
| 879 | device->config_rom_retries = 0; |
| 880 | goto out; |
| 881 | |
| 882 | case REREAD_BIB_CHANGED: |
| 883 | break; |
| 884 | } |
| 885 | |
| 886 | /* |
| 887 | * Something changed. We keep things simple and don't investigate |
| 888 | * further. We just destroy all previous units and create new ones. |
| 889 | */ |
| 890 | device_for_each_child(&device->device, NULL, shutdown_unit); |
| 891 | |
| 892 | if (read_bus_info_block(device, device->generation) < 0) { |
| 893 | if (device->config_rom_retries < MAX_RETRIES && |
| 894 | atomic_read(&device->state) == FW_DEVICE_INITIALIZING) { |
| 895 | device->config_rom_retries++; |
| 896 | schedule_delayed_work(&device->work, RETRY_DELAY); |
| 897 | |
| 898 | return; |
| 899 | } |
| 900 | goto give_up; |
| 901 | } |
| 902 | |
| 903 | create_units(device); |
| 904 | |
| 905 | if (atomic_cmpxchg(&device->state, |
| 906 | FW_DEVICE_INITIALIZING, |
| 907 | FW_DEVICE_RUNNING) == FW_DEVICE_SHUTDOWN) |
| 908 | goto gone; |
| 909 | |
| 910 | fw_notify("refreshed device %s\n", device->device.bus_id); |
| 911 | device->config_rom_retries = 0; |
| 912 | goto out; |
| 913 | |
| 914 | give_up: |
| 915 | fw_notify("giving up on refresh of device %s\n", device->device.bus_id); |
| 916 | gone: |
| 917 | atomic_set(&device->state, FW_DEVICE_SHUTDOWN); |
| 918 | fw_device_shutdown(work); |
| 919 | out: |
| 920 | if (node_id == card->root_node->node_id) |
| 921 | schedule_delayed_work(&card->work, 0); |
| 922 | } |
| 923 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 924 | void fw_node_event(struct fw_card *card, struct fw_node *node, int event) |
| 925 | { |
| 926 | struct fw_device *device; |
| 927 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 928 | switch (event) { |
| 929 | case FW_NODE_CREATED: |
| 930 | case FW_NODE_LINK_ON: |
| 931 | if (!node->link_on) |
| 932 | break; |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame^] | 933 | create: |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 934 | device = kzalloc(sizeof(*device), GFP_ATOMIC); |
| 935 | if (device == NULL) |
| 936 | break; |
| 937 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 938 | /* |
| 939 | * Do minimal intialization of the device here, the |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 940 | * rest will happen in fw_device_init(). We need the |
| 941 | * card and node so we can read the config rom and we |
| 942 | * need to do device_initialize() now so |
| 943 | * device_for_each_child() in FW_NODE_UPDATED is |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 944 | * doesn't freak out. |
| 945 | */ |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 946 | device_initialize(&device->device); |
Stefan Richter | 641f879 | 2007-01-27 10:34:55 +0100 | [diff] [blame] | 947 | atomic_set(&device->state, FW_DEVICE_INITIALIZING); |
Stefan Richter | 855c603 | 2008-02-27 22:14:27 +0100 | [diff] [blame] | 948 | atomic_inc(&card->device_count); |
| 949 | device->card = card; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 950 | device->node = fw_node_get(node); |
| 951 | device->node_id = node->node_id; |
| 952 | device->generation = card->generation; |
Kristian Høgsberg | 97bd9ef | 2007-03-07 12:12:41 -0500 | [diff] [blame] | 953 | INIT_LIST_HEAD(&device->client_list); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 954 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 955 | /* |
| 956 | * Set the node data to point back to this device so |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 957 | * FW_NODE_UPDATED callbacks can update the node_id |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 958 | * and generation for the device. |
| 959 | */ |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 960 | node->data = device; |
| 961 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 962 | /* |
| 963 | * Many devices are slow to respond after bus resets, |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 964 | * especially if they are bus powered and go through |
| 965 | * power-up after getting plugged in. We schedule the |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 966 | * first config rom scan half a second after bus reset. |
| 967 | */ |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 968 | INIT_DELAYED_WORK(&device->work, fw_device_init); |
| 969 | schedule_delayed_work(&device->work, INITIAL_DELAY); |
| 970 | break; |
| 971 | |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame^] | 972 | case FW_NODE_INITIATED_RESET: |
| 973 | device = node->data; |
| 974 | if (device == NULL) |
| 975 | goto create; |
| 976 | |
| 977 | device->node_id = node->node_id; |
| 978 | smp_wmb(); /* update node_id before generation */ |
| 979 | device->generation = card->generation; |
| 980 | if (atomic_cmpxchg(&device->state, |
| 981 | FW_DEVICE_RUNNING, |
| 982 | FW_DEVICE_INITIALIZING) == FW_DEVICE_RUNNING) { |
| 983 | PREPARE_DELAYED_WORK(&device->work, fw_device_refresh); |
| 984 | schedule_delayed_work(&device->work, |
| 985 | node == card->local_node ? 0 : INITIAL_DELAY); |
| 986 | } |
| 987 | break; |
| 988 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 989 | case FW_NODE_UPDATED: |
| 990 | if (!node->link_on || node->data == NULL) |
| 991 | break; |
| 992 | |
| 993 | device = node->data; |
| 994 | device->node_id = node->node_id; |
Stefan Richter | b5d2a5e | 2008-01-25 18:57:41 +0100 | [diff] [blame] | 995 | smp_wmb(); /* update node_id before generation */ |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 996 | device->generation = card->generation; |
Kristian Høgsberg | 5f48047 | 2007-03-07 12:12:39 -0500 | [diff] [blame] | 997 | if (atomic_read(&device->state) == FW_DEVICE_RUNNING) { |
| 998 | PREPARE_DELAYED_WORK(&device->work, fw_device_update); |
| 999 | schedule_delayed_work(&device->work, 0); |
| 1000 | } |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1001 | break; |
| 1002 | |
| 1003 | case FW_NODE_DESTROYED: |
| 1004 | case FW_NODE_LINK_OFF: |
| 1005 | if (!node->data) |
| 1006 | break; |
| 1007 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1008 | /* |
| 1009 | * Destroy the device associated with the node. There |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1010 | * are two cases here: either the device is fully |
| 1011 | * initialized (FW_DEVICE_RUNNING) or we're in the |
| 1012 | * process of reading its config rom |
| 1013 | * (FW_DEVICE_INITIALIZING). If it is fully |
| 1014 | * initialized we can reuse device->work to schedule a |
| 1015 | * full fw_device_shutdown(). If not, there's work |
| 1016 | * scheduled to read it's config rom, and we just put |
| 1017 | * the device in shutdown state to have that code fail |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1018 | * to create the device. |
| 1019 | */ |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1020 | device = node->data; |
Stefan Richter | 641f879 | 2007-01-27 10:34:55 +0100 | [diff] [blame] | 1021 | if (atomic_xchg(&device->state, |
Kristian Høgsberg | 5f48047 | 2007-03-07 12:12:39 -0500 | [diff] [blame] | 1022 | FW_DEVICE_SHUTDOWN) == FW_DEVICE_RUNNING) { |
| 1023 | PREPARE_DELAYED_WORK(&device->work, fw_device_shutdown); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1024 | schedule_delayed_work(&device->work, 0); |
| 1025 | } |
| 1026 | break; |
| 1027 | } |
| 1028 | } |