Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Functions to handle I2O devices |
| 3 | * |
| 4 | * Copyright (C) 2004 Markus Lidel <Markus.Lidel@shadowconnect.com> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of the GNU General Public License as published by the |
| 8 | * Free Software Foundation; either version 2 of the License, or (at your |
| 9 | * option) any later version. |
| 10 | * |
| 11 | * Fixes/additions: |
| 12 | * Markus Lidel <Markus.Lidel@shadowconnect.com> |
| 13 | * initial version. |
| 14 | */ |
| 15 | |
| 16 | #include <linux/module.h> |
| 17 | #include <linux/i2o.h> |
| 18 | #include <linux/delay.h> |
Tim Schmielau | 4e57b68 | 2005-10-30 15:03:48 -0800 | [diff] [blame] | 19 | #include <linux/string.h> |
| 20 | #include <linux/slab.h> |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 21 | #include "core.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | |
| 23 | /** |
| 24 | * i2o_device_issue_claim - claim or release a device |
| 25 | * @dev: I2O device to claim or release |
| 26 | * @cmd: claim or release command |
| 27 | * @type: type of claim |
| 28 | * |
| 29 | * Issue I2O UTIL_CLAIM or UTIL_RELEASE messages. The message to be sent |
| 30 | * is set by cmd. dev is the I2O device which should be claim or |
| 31 | * released and the type is the claim type (see the I2O spec). |
| 32 | * |
| 33 | * Returs 0 on success or negative error code on failure. |
| 34 | */ |
| 35 | static inline int i2o_device_issue_claim(struct i2o_device *dev, u32 cmd, |
| 36 | u32 type) |
| 37 | { |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 38 | struct i2o_message *msg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 40 | msg = i2o_msg_get_wait(dev->iop, I2O_TIMEOUT_MESSAGE_GET); |
| 41 | if (IS_ERR(msg)) |
| 42 | return PTR_ERR(msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 44 | msg->u.head[0] = cpu_to_le32(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0); |
| 45 | msg->u.head[1] = |
| 46 | cpu_to_le32(cmd << 24 | HOST_TID << 12 | dev->lct_data.tid); |
| 47 | msg->body[0] = cpu_to_le32(type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 49 | return i2o_msg_post_wait(dev->iop, msg, 60); |
Dmitry Torokhov | 4f5ca09 | 2005-09-15 02:01:32 -0500 | [diff] [blame] | 50 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | |
| 52 | /** |
Dmitry Torokhov | 4f5ca09 | 2005-09-15 02:01:32 -0500 | [diff] [blame] | 53 | * i2o_device_claim - claim a device for use by an OSM |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | * @dev: I2O device to claim |
| 55 | * @drv: I2O driver which wants to claim the device |
| 56 | * |
| 57 | * Do the leg work to assign a device to a given OSM. If the claim succeed |
| 58 | * the owner of the rimary. If the attempt fails a negative errno code |
| 59 | * is returned. On success zero is returned. |
| 60 | */ |
| 61 | int i2o_device_claim(struct i2o_device *dev) |
| 62 | { |
| 63 | int rc = 0; |
| 64 | |
| 65 | down(&dev->lock); |
| 66 | |
| 67 | rc = i2o_device_issue_claim(dev, I2O_CMD_UTIL_CLAIM, I2O_CLAIM_PRIMARY); |
| 68 | if (!rc) |
| 69 | pr_debug("i2o: claim of device %d succeded\n", |
| 70 | dev->lct_data.tid); |
| 71 | else |
| 72 | pr_debug("i2o: claim of device %d failed %d\n", |
| 73 | dev->lct_data.tid, rc); |
| 74 | |
| 75 | up(&dev->lock); |
| 76 | |
| 77 | return rc; |
Dmitry Torokhov | 4f5ca09 | 2005-09-15 02:01:32 -0500 | [diff] [blame] | 78 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | |
| 80 | /** |
| 81 | * i2o_device_claim_release - release a device that the OSM is using |
| 82 | * @dev: device to release |
| 83 | * @drv: driver which claimed the device |
| 84 | * |
| 85 | * Drop a claim by an OSM on a given I2O device. |
| 86 | * |
| 87 | * AC - some devices seem to want to refuse an unclaim until they have |
| 88 | * finished internal processing. It makes sense since you don't want a |
| 89 | * new device to go reconfiguring the entire system until you are done. |
| 90 | * Thus we are prepared to wait briefly. |
| 91 | * |
| 92 | * Returns 0 on success or negative error code on failure. |
| 93 | */ |
| 94 | int i2o_device_claim_release(struct i2o_device *dev) |
| 95 | { |
| 96 | int tries; |
| 97 | int rc = 0; |
| 98 | |
| 99 | down(&dev->lock); |
| 100 | |
| 101 | /* |
| 102 | * If the controller takes a nonblocking approach to |
| 103 | * releases we have to sleep/poll for a few times. |
| 104 | */ |
| 105 | for (tries = 0; tries < 10; tries++) { |
| 106 | rc = i2o_device_issue_claim(dev, I2O_CMD_UTIL_RELEASE, |
| 107 | I2O_CLAIM_PRIMARY); |
| 108 | if (!rc) |
| 109 | break; |
| 110 | |
| 111 | ssleep(1); |
| 112 | } |
| 113 | |
| 114 | if (!rc) |
| 115 | pr_debug("i2o: claim release of device %d succeded\n", |
| 116 | dev->lct_data.tid); |
| 117 | else |
| 118 | pr_debug("i2o: claim release of device %d failed %d\n", |
| 119 | dev->lct_data.tid, rc); |
| 120 | |
| 121 | up(&dev->lock); |
| 122 | |
| 123 | return rc; |
Dmitry Torokhov | 4f5ca09 | 2005-09-15 02:01:32 -0500 | [diff] [blame] | 124 | } |
| 125 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | |
| 127 | /** |
| 128 | * i2o_device_release - release the memory for a I2O device |
| 129 | * @dev: I2O device which should be released |
| 130 | * |
| 131 | * Release the allocated memory. This function is called if refcount of |
| 132 | * device reaches 0 automatically. |
| 133 | */ |
| 134 | static void i2o_device_release(struct device *dev) |
| 135 | { |
| 136 | struct i2o_device *i2o_dev = to_i2o_device(dev); |
| 137 | |
| 138 | pr_debug("i2o: device %s released\n", dev->bus_id); |
| 139 | |
| 140 | kfree(i2o_dev); |
Dmitry Torokhov | 4f5ca09 | 2005-09-15 02:01:32 -0500 | [diff] [blame] | 141 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | |
Dmitry Torokhov | 4f5ca09 | 2005-09-15 02:01:32 -0500 | [diff] [blame] | 144 | /** |
Markus Lidel | 24791bd | 2006-01-06 00:19:31 -0800 | [diff] [blame^] | 145 | * i2o_device_show_class_id - Displays class id of I2O device |
| 146 | * @dev: device of which the class id should be displayed |
| 147 | * @attr: pointer to device attribute |
Dmitry Torokhov | 4f5ca09 | 2005-09-15 02:01:32 -0500 | [diff] [blame] | 148 | * @buf: buffer into which the class id should be printed |
| 149 | * |
| 150 | * Returns the number of bytes which are printed into the buffer. |
| 151 | */ |
Dmitry Torokhov | 7bd7b09 | 2005-09-29 00:40:07 -0500 | [diff] [blame] | 152 | static ssize_t i2o_device_show_class_id(struct device *dev, |
| 153 | struct device_attribute *attr, |
| 154 | char *buf) |
Dmitry Torokhov | 4f5ca09 | 2005-09-15 02:01:32 -0500 | [diff] [blame] | 155 | { |
Dmitry Torokhov | 7bd7b09 | 2005-09-29 00:40:07 -0500 | [diff] [blame] | 156 | struct i2o_device *i2o_dev = to_i2o_device(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | |
Dmitry Torokhov | 7bd7b09 | 2005-09-29 00:40:07 -0500 | [diff] [blame] | 158 | sprintf(buf, "0x%03x\n", i2o_dev->lct_data.class_id); |
Dmitry Torokhov | 4f5ca09 | 2005-09-15 02:01:32 -0500 | [diff] [blame] | 159 | return strlen(buf) + 1; |
| 160 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | |
Dmitry Torokhov | 4f5ca09 | 2005-09-15 02:01:32 -0500 | [diff] [blame] | 162 | /** |
Markus Lidel | 24791bd | 2006-01-06 00:19:31 -0800 | [diff] [blame^] | 163 | * i2o_device_show_tid - Displays TID of I2O device |
| 164 | * @dev: device of which the TID should be displayed |
| 165 | * @attr: pointer to device attribute |
| 166 | * @buf: buffer into which the TID should be printed |
Dmitry Torokhov | 4f5ca09 | 2005-09-15 02:01:32 -0500 | [diff] [blame] | 167 | * |
| 168 | * Returns the number of bytes which are printed into the buffer. |
| 169 | */ |
Dmitry Torokhov | 7bd7b09 | 2005-09-29 00:40:07 -0500 | [diff] [blame] | 170 | static ssize_t i2o_device_show_tid(struct device *dev, |
Markus Lidel | 24791bd | 2006-01-06 00:19:31 -0800 | [diff] [blame^] | 171 | struct device_attribute *attr, char *buf) |
Dmitry Torokhov | 4f5ca09 | 2005-09-15 02:01:32 -0500 | [diff] [blame] | 172 | { |
Dmitry Torokhov | 7bd7b09 | 2005-09-29 00:40:07 -0500 | [diff] [blame] | 173 | struct i2o_device *i2o_dev = to_i2o_device(dev); |
Dmitry Torokhov | 4f5ca09 | 2005-09-15 02:01:32 -0500 | [diff] [blame] | 174 | |
Dmitry Torokhov | 7bd7b09 | 2005-09-29 00:40:07 -0500 | [diff] [blame] | 175 | sprintf(buf, "0x%03x\n", i2o_dev->lct_data.tid); |
Dmitry Torokhov | 4f5ca09 | 2005-09-15 02:01:32 -0500 | [diff] [blame] | 176 | return strlen(buf) + 1; |
| 177 | } |
| 178 | |
Dmitry Torokhov | 7bd7b09 | 2005-09-29 00:40:07 -0500 | [diff] [blame] | 179 | struct device_attribute i2o_device_attrs[] = { |
| 180 | __ATTR(class_id, S_IRUGO, i2o_device_show_class_id, NULL), |
| 181 | __ATTR(tid, S_IRUGO, i2o_device_show_tid, NULL), |
Dmitry Torokhov | 4f5ca09 | 2005-09-15 02:01:32 -0500 | [diff] [blame] | 182 | __ATTR_NULL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | }; |
| 184 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | /** |
| 186 | * i2o_device_alloc - Allocate a I2O device and initialize it |
| 187 | * |
| 188 | * Allocate the memory for a I2O device and initialize locks and lists |
| 189 | * |
| 190 | * Returns the allocated I2O device or a negative error code if the device |
| 191 | * could not be allocated. |
| 192 | */ |
| 193 | static struct i2o_device *i2o_device_alloc(void) |
| 194 | { |
| 195 | struct i2o_device *dev; |
| 196 | |
| 197 | dev = kmalloc(sizeof(*dev), GFP_KERNEL); |
| 198 | if (!dev) |
| 199 | return ERR_PTR(-ENOMEM); |
| 200 | |
| 201 | memset(dev, 0, sizeof(*dev)); |
| 202 | |
| 203 | INIT_LIST_HEAD(&dev->list); |
| 204 | init_MUTEX(&dev->lock); |
| 205 | |
| 206 | dev->device.bus = &i2o_bus_type; |
| 207 | dev->device.release = &i2o_device_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | |
| 209 | return dev; |
Dmitry Torokhov | 4f5ca09 | 2005-09-15 02:01:32 -0500 | [diff] [blame] | 210 | } |
| 211 | |
| 212 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | * i2o_device_add - allocate a new I2O device and add it to the IOP |
| 214 | * @iop: I2O controller where the device is on |
| 215 | * @entry: LCT entry of the I2O device |
| 216 | * |
| 217 | * Allocate a new I2O device and initialize it with the LCT entry. The |
| 218 | * device is appended to the device list of the controller. |
| 219 | * |
| 220 | * Returns a pointer to the I2O device on success or negative error code |
| 221 | * on failure. |
| 222 | */ |
| 223 | static struct i2o_device *i2o_device_add(struct i2o_controller *c, |
| 224 | i2o_lct_entry * entry) |
| 225 | { |
Markus Lidel | 24791bd | 2006-01-06 00:19:31 -0800 | [diff] [blame^] | 226 | struct i2o_device *i2o_dev, *tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | |
Markus Lidel | 24791bd | 2006-01-06 00:19:31 -0800 | [diff] [blame^] | 228 | i2o_dev = i2o_device_alloc(); |
| 229 | if (IS_ERR(i2o_dev)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | printk(KERN_ERR "i2o: unable to allocate i2o device\n"); |
Markus Lidel | 24791bd | 2006-01-06 00:19:31 -0800 | [diff] [blame^] | 231 | return i2o_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | } |
| 233 | |
Markus Lidel | 24791bd | 2006-01-06 00:19:31 -0800 | [diff] [blame^] | 234 | i2o_dev->lct_data = *entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | |
Markus Lidel | 24791bd | 2006-01-06 00:19:31 -0800 | [diff] [blame^] | 236 | snprintf(i2o_dev->device.bus_id, BUS_ID_SIZE, "%d:%03x", c->unit, |
| 237 | i2o_dev->lct_data.tid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | |
Markus Lidel | 24791bd | 2006-01-06 00:19:31 -0800 | [diff] [blame^] | 239 | i2o_dev->iop = c; |
| 240 | i2o_dev->device.parent = &c->device; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | |
Markus Lidel | 24791bd | 2006-01-06 00:19:31 -0800 | [diff] [blame^] | 242 | device_register(&i2o_dev->device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | |
Markus Lidel | 24791bd | 2006-01-06 00:19:31 -0800 | [diff] [blame^] | 244 | list_add_tail(&i2o_dev->list, &c->devices); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | |
Markus Lidel | 24791bd | 2006-01-06 00:19:31 -0800 | [diff] [blame^] | 246 | /* create user entries for this device */ |
| 247 | tmp = i2o_iop_find_device(i2o_dev->iop, i2o_dev->lct_data.user_tid); |
| 248 | if (tmp && (tmp != i2o_dev)) |
| 249 | sysfs_create_link(&i2o_dev->device.kobj, &tmp->device.kobj, |
| 250 | "user"); |
Dmitry Torokhov | 4f5ca09 | 2005-09-15 02:01:32 -0500 | [diff] [blame] | 251 | |
Markus Lidel | 24791bd | 2006-01-06 00:19:31 -0800 | [diff] [blame^] | 252 | /* create user entries refering to this device */ |
| 253 | list_for_each_entry(tmp, &c->devices, list) |
| 254 | if ((tmp->lct_data.user_tid == i2o_dev->lct_data.tid) |
| 255 | && (tmp != i2o_dev)) |
| 256 | sysfs_create_link(&tmp->device.kobj, |
| 257 | &i2o_dev->device.kobj, "user"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | |
Markus Lidel | 24791bd | 2006-01-06 00:19:31 -0800 | [diff] [blame^] | 259 | /* create parent entries for this device */ |
| 260 | tmp = i2o_iop_find_device(i2o_dev->iop, i2o_dev->lct_data.parent_tid); |
| 261 | if (tmp && (tmp != i2o_dev)) |
| 262 | sysfs_create_link(&i2o_dev->device.kobj, &tmp->device.kobj, |
| 263 | "parent"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | |
Markus Lidel | 24791bd | 2006-01-06 00:19:31 -0800 | [diff] [blame^] | 265 | /* create parent entries refering to this device */ |
| 266 | list_for_each_entry(tmp, &c->devices, list) |
| 267 | if ((tmp->lct_data.parent_tid == i2o_dev->lct_data.tid) |
| 268 | && (tmp != i2o_dev)) |
| 269 | sysfs_create_link(&tmp->device.kobj, |
| 270 | &i2o_dev->device.kobj, "parent"); |
| 271 | |
| 272 | i2o_driver_notify_device_add_all(i2o_dev); |
| 273 | |
| 274 | pr_debug("i2o: device %s added\n", i2o_dev->device.bus_id); |
| 275 | |
| 276 | return i2o_dev; |
Dmitry Torokhov | 4f5ca09 | 2005-09-15 02:01:32 -0500 | [diff] [blame] | 277 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | |
| 279 | /** |
| 280 | * i2o_device_remove - remove an I2O device from the I2O core |
| 281 | * @dev: I2O device which should be released |
| 282 | * |
| 283 | * Is used on I2O controller removal or LCT modification, when the device |
| 284 | * is removed from the system. Note that the device could still hang |
| 285 | * around until the refcount reaches 0. |
| 286 | */ |
| 287 | void i2o_device_remove(struct i2o_device *i2o_dev) |
| 288 | { |
Markus Lidel | 24791bd | 2006-01-06 00:19:31 -0800 | [diff] [blame^] | 289 | struct i2o_device *tmp; |
| 290 | struct i2o_controller *c = i2o_dev->iop; |
| 291 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | i2o_driver_notify_device_remove_all(i2o_dev); |
Markus Lidel | 24791bd | 2006-01-06 00:19:31 -0800 | [diff] [blame^] | 293 | |
| 294 | sysfs_remove_link(&i2o_dev->device.kobj, "parent"); |
| 295 | sysfs_remove_link(&i2o_dev->device.kobj, "user"); |
| 296 | |
| 297 | list_for_each_entry(tmp, &c->devices, list) { |
| 298 | if (tmp->lct_data.parent_tid == i2o_dev->lct_data.tid) |
| 299 | sysfs_remove_link(&tmp->device.kobj, "parent"); |
| 300 | if (tmp->lct_data.user_tid == i2o_dev->lct_data.tid) |
| 301 | sysfs_remove_link(&tmp->device.kobj, "user"); |
| 302 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | list_del(&i2o_dev->list); |
Markus Lidel | 24791bd | 2006-01-06 00:19:31 -0800 | [diff] [blame^] | 304 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | device_unregister(&i2o_dev->device); |
Dmitry Torokhov | 4f5ca09 | 2005-09-15 02:01:32 -0500 | [diff] [blame] | 306 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | |
| 308 | /** |
| 309 | * i2o_device_parse_lct - Parse a previously fetched LCT and create devices |
| 310 | * @c: I2O controller from which the LCT should be parsed. |
| 311 | * |
| 312 | * The Logical Configuration Table tells us what we can talk to on the |
| 313 | * board. For every entry we create an I2O device, which is registered in |
| 314 | * the I2O core. |
| 315 | * |
| 316 | * Returns 0 on success or negative error code on failure. |
| 317 | */ |
| 318 | int i2o_device_parse_lct(struct i2o_controller *c) |
| 319 | { |
| 320 | struct i2o_device *dev, *tmp; |
| 321 | i2o_lct *lct; |
Markus Lidel | 793fd15 | 2006-01-06 00:19:30 -0800 | [diff] [blame] | 322 | u32 *dlct = c->dlct.virt; |
| 323 | int max = 0, i = 0; |
| 324 | u16 table_size; |
| 325 | u32 buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | |
| 327 | down(&c->lct_lock); |
| 328 | |
Markus Lidel | f88e119 | 2005-06-23 22:02:14 -0700 | [diff] [blame] | 329 | kfree(c->lct); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | |
Markus Lidel | 793fd15 | 2006-01-06 00:19:30 -0800 | [diff] [blame] | 331 | buf = le32_to_cpu(*dlct++); |
| 332 | table_size = buf & 0xffff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | |
Markus Lidel | 793fd15 | 2006-01-06 00:19:30 -0800 | [diff] [blame] | 334 | lct = c->lct = kmalloc(table_size * 4, GFP_KERNEL); |
| 335 | if (!lct) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | up(&c->lct_lock); |
| 337 | return -ENOMEM; |
| 338 | } |
| 339 | |
Markus Lidel | 793fd15 | 2006-01-06 00:19:30 -0800 | [diff] [blame] | 340 | lct->lct_ver = buf >> 28; |
| 341 | lct->boot_tid = buf >> 16 & 0xfff; |
| 342 | lct->table_size = table_size; |
| 343 | lct->change_ind = le32_to_cpu(*dlct++); |
| 344 | lct->iop_flags = le32_to_cpu(*dlct++); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | |
Markus Lidel | 793fd15 | 2006-01-06 00:19:30 -0800 | [diff] [blame] | 346 | table_size -= 3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | |
| 348 | pr_debug("%s: LCT has %d entries (LCT size: %d)\n", c->name, max, |
| 349 | lct->table_size); |
| 350 | |
Markus Lidel | 793fd15 | 2006-01-06 00:19:30 -0800 | [diff] [blame] | 351 | while (table_size > 0) { |
| 352 | i2o_lct_entry *entry = &lct->lct_entry[max]; |
| 353 | int found = 0; |
| 354 | |
| 355 | buf = le32_to_cpu(*dlct++); |
| 356 | entry->entry_size = buf & 0xffff; |
| 357 | entry->tid = buf >> 16 & 0xfff; |
| 358 | |
| 359 | entry->change_ind = le32_to_cpu(*dlct++); |
| 360 | entry->device_flags = le32_to_cpu(*dlct++); |
| 361 | |
| 362 | buf = le32_to_cpu(*dlct++); |
| 363 | entry->class_id = buf & 0xfff; |
| 364 | entry->version = buf >> 12 & 0xf; |
| 365 | entry->vendor_id = buf >> 16; |
| 366 | |
| 367 | entry->sub_class = le32_to_cpu(*dlct++); |
| 368 | |
| 369 | buf = le32_to_cpu(*dlct++); |
| 370 | entry->user_tid = buf & 0xfff; |
| 371 | entry->parent_tid = buf >> 12 & 0xfff; |
| 372 | entry->bios_info = buf >> 24; |
| 373 | |
| 374 | memcpy(&entry->identity_tag, dlct, 8); |
| 375 | dlct += 2; |
| 376 | |
| 377 | entry->event_capabilities = le32_to_cpu(*dlct++); |
| 378 | |
| 379 | /* add new devices, which are new in the LCT */ |
| 380 | list_for_each_entry_safe(dev, tmp, &c->devices, list) { |
| 381 | if (entry->tid == dev->lct_data.tid) { |
| 382 | found = 1; |
| 383 | break; |
| 384 | } |
| 385 | } |
| 386 | |
| 387 | if (!found) |
| 388 | i2o_device_add(c, entry); |
| 389 | |
| 390 | table_size -= 9; |
| 391 | max++; |
| 392 | } |
| 393 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | /* remove devices, which are not in the LCT anymore */ |
| 395 | list_for_each_entry_safe(dev, tmp, &c->devices, list) { |
| 396 | int found = 0; |
| 397 | |
| 398 | for (i = 0; i < max; i++) { |
| 399 | if (lct->lct_entry[i].tid == dev->lct_data.tid) { |
| 400 | found = 1; |
| 401 | break; |
| 402 | } |
| 403 | } |
| 404 | |
| 405 | if (!found) |
| 406 | i2o_device_remove(dev); |
| 407 | } |
| 408 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | up(&c->lct_lock); |
| 410 | |
| 411 | return 0; |
Dmitry Torokhov | 4f5ca09 | 2005-09-15 02:01:32 -0500 | [diff] [blame] | 412 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | |
| 415 | /* |
| 416 | * Run time support routines |
| 417 | */ |
| 418 | |
| 419 | /* Issue UTIL_PARAMS_GET or UTIL_PARAMS_SET |
| 420 | * |
| 421 | * This function can be used for all UtilParamsGet/Set operations. |
| 422 | * The OperationList is given in oplist-buffer, |
| 423 | * and results are returned in reslist-buffer. |
| 424 | * Note that the minimum sized reslist is 8 bytes and contains |
| 425 | * ResultCount, ErrorInfoSize, BlockStatus and BlockSize. |
| 426 | */ |
Andrew Morton | f52bdbe | 2005-06-23 22:02:26 -0700 | [diff] [blame] | 427 | int i2o_parm_issue(struct i2o_device *i2o_dev, int cmd, void *oplist, |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 428 | int oplen, void *reslist, int reslen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | { |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 430 | struct i2o_message *msg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | int i = 0; |
| 432 | int rc; |
| 433 | struct i2o_dma res; |
| 434 | struct i2o_controller *c = i2o_dev->iop; |
| 435 | struct device *dev = &c->pdev->dev; |
| 436 | |
| 437 | res.virt = NULL; |
| 438 | |
| 439 | if (i2o_dma_alloc(dev, &res, reslen, GFP_KERNEL)) |
| 440 | return -ENOMEM; |
| 441 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 442 | msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET); |
| 443 | if (IS_ERR(msg)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | i2o_dma_free(dev, &res); |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 445 | return PTR_ERR(msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | } |
| 447 | |
| 448 | i = 0; |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 449 | msg->u.head[1] = |
| 450 | cpu_to_le32(cmd << 24 | HOST_TID << 12 | i2o_dev->lct_data.tid); |
| 451 | msg->body[i++] = cpu_to_le32(0x00000000); |
| 452 | msg->body[i++] = cpu_to_le32(0x4C000000 | oplen); /* OperationList */ |
| 453 | memcpy(&msg->body[i], oplist, oplen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | i += (oplen / 4 + (oplen % 4 ? 1 : 0)); |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 455 | msg->body[i++] = cpu_to_le32(0xD0000000 | res.len); /* ResultList */ |
| 456 | msg->body[i++] = cpu_to_le32(res.phys); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 458 | msg->u.head[0] = |
| 459 | cpu_to_le32(I2O_MESSAGE_SIZE(i + sizeof(struct i2o_message) / 4) | |
| 460 | SGL_OFFSET_5); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 462 | rc = i2o_msg_post_wait_mem(c, msg, 10, &res); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | |
| 464 | /* This only looks like a memory leak - don't "fix" it. */ |
| 465 | if (rc == -ETIMEDOUT) |
| 466 | return rc; |
| 467 | |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 468 | memcpy(reslist, res.virt, res.len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | i2o_dma_free(dev, &res); |
| 470 | |
Markus Lidel | 793fd15 | 2006-01-06 00:19:30 -0800 | [diff] [blame] | 471 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | } |
| 473 | |
| 474 | /* |
| 475 | * Query one field group value or a whole scalar group. |
| 476 | */ |
| 477 | int i2o_parm_field_get(struct i2o_device *i2o_dev, int group, int field, |
| 478 | void *buf, int buflen) |
| 479 | { |
Markus Lidel | 793fd15 | 2006-01-06 00:19:30 -0800 | [diff] [blame] | 480 | u32 opblk[] = { cpu_to_le32(0x00000001), |
| 481 | cpu_to_le32((u16) group << 16 | I2O_PARAMS_FIELD_GET), |
| 482 | cpu_to_le32((s16) field << 16 | 0x00000001) |
| 483 | }; |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 484 | u8 *resblk; /* 8 bytes for header */ |
Markus Lidel | 793fd15 | 2006-01-06 00:19:30 -0800 | [diff] [blame] | 485 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 487 | resblk = kmalloc(buflen + 8, GFP_KERNEL | GFP_ATOMIC); |
| 488 | if (!resblk) |
| 489 | return -ENOMEM; |
| 490 | |
Markus Lidel | 793fd15 | 2006-01-06 00:19:30 -0800 | [diff] [blame] | 491 | rc = i2o_parm_issue(i2o_dev, I2O_CMD_UTIL_PARAMS_GET, opblk, |
| 492 | sizeof(opblk), resblk, buflen + 8); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | |
| 494 | memcpy(buf, resblk + 8, buflen); /* cut off header */ |
| 495 | |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 496 | kfree(resblk); |
| 497 | |
Markus Lidel | 793fd15 | 2006-01-06 00:19:30 -0800 | [diff] [blame] | 498 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | } |
| 500 | |
| 501 | /* |
Dmitry Torokhov | 4f5ca09 | 2005-09-15 02:01:32 -0500 | [diff] [blame] | 502 | * if oper == I2O_PARAMS_TABLE_GET, get from all rows |
| 503 | * if fieldcount == -1 return all fields |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | * ibuf and ibuflen are unused (use NULL, 0) |
Dmitry Torokhov | 4f5ca09 | 2005-09-15 02:01:32 -0500 | [diff] [blame] | 505 | * else return specific fields |
| 506 | * ibuf contains fieldindexes |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | * |
| 508 | * if oper == I2O_PARAMS_LIST_GET, get from specific rows |
| 509 | * if fieldcount == -1 return all fields |
| 510 | * ibuf contains rowcount, keyvalues |
| 511 | * else return specific fields |
| 512 | * fieldcount is # of fieldindexes |
| 513 | * ibuf contains fieldindexes, rowcount, keyvalues |
| 514 | * |
| 515 | * You could also use directly function i2o_issue_params(). |
| 516 | */ |
| 517 | int i2o_parm_table_get(struct i2o_device *dev, int oper, int group, |
| 518 | int fieldcount, void *ibuf, int ibuflen, void *resblk, |
| 519 | int reslen) |
| 520 | { |
| 521 | u16 *opblk; |
| 522 | int size; |
| 523 | |
| 524 | size = 10 + ibuflen; |
| 525 | if (size % 4) |
| 526 | size += 4 - size % 4; |
| 527 | |
| 528 | opblk = kmalloc(size, GFP_KERNEL); |
| 529 | if (opblk == NULL) { |
| 530 | printk(KERN_ERR "i2o: no memory for query buffer.\n"); |
| 531 | return -ENOMEM; |
| 532 | } |
| 533 | |
| 534 | opblk[0] = 1; /* operation count */ |
| 535 | opblk[1] = 0; /* pad */ |
| 536 | opblk[2] = oper; |
| 537 | opblk[3] = group; |
| 538 | opblk[4] = fieldcount; |
| 539 | memcpy(opblk + 5, ibuf, ibuflen); /* other params */ |
| 540 | |
| 541 | size = i2o_parm_issue(dev, I2O_CMD_UTIL_PARAMS_GET, opblk, |
| 542 | size, resblk, reslen); |
| 543 | |
| 544 | kfree(opblk); |
| 545 | if (size > reslen) |
| 546 | return reslen; |
| 547 | |
| 548 | return size; |
| 549 | } |
| 550 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | EXPORT_SYMBOL(i2o_device_claim); |
| 552 | EXPORT_SYMBOL(i2o_device_claim_release); |
| 553 | EXPORT_SYMBOL(i2o_parm_field_get); |
| 554 | EXPORT_SYMBOL(i2o_parm_table_get); |
| 555 | EXPORT_SYMBOL(i2o_parm_issue); |