Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Executive OSM |
| 3 | * |
| 4 | * Copyright (C) 1999-2002 Red Hat Software |
| 5 | * |
| 6 | * Written by Alan Cox, Building Number Three Ltd |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify it |
| 9 | * under the terms of the GNU General Public License as published by the |
| 10 | * Free Software Foundation; either version 2 of the License, or (at your |
| 11 | * option) any later version. |
| 12 | * |
| 13 | * A lot of the I2O message side code from this is taken from the Red |
| 14 | * Creek RCPCI45 adapter driver by Red Creek Communications |
| 15 | * |
| 16 | * Fixes/additions: |
| 17 | * Philipp Rumpf |
| 18 | * Juha Sievänen <Juha.Sievanen@cs.Helsinki.FI> |
| 19 | * Auvo Häkkinen <Auvo.Hakkinen@cs.Helsinki.FI> |
| 20 | * Deepak Saxena <deepak@plexity.net> |
| 21 | * Boji T Kannanthanam <boji.t.kannanthanam@intel.com> |
| 22 | * Alan Cox <alan@redhat.com>: |
| 23 | * Ported to Linux 2.5. |
| 24 | * Markus Lidel <Markus.Lidel@shadowconnect.com>: |
| 25 | * Minor fixes for 2.6. |
| 26 | * Markus Lidel <Markus.Lidel@shadowconnect.com>: |
| 27 | * Support for sysfs included. |
| 28 | */ |
| 29 | |
| 30 | #include <linux/module.h> |
| 31 | #include <linux/i2o.h> |
| 32 | #include <linux/delay.h> |
Tim Schmielau | 4e57b68 | 2005-10-30 15:03:48 -0800 | [diff] [blame] | 33 | #include <linux/workqueue.h> |
| 34 | #include <linux/string.h> |
| 35 | #include <linux/slab.h> |
Markus Lidel | 524e3b6 | 2006-01-06 00:19:34 -0800 | [diff] [blame] | 36 | #include <linux/sched.h> /* wait_event_interruptible_timeout() needs this */ |
Tim Schmielau | 4e57b68 | 2005-10-30 15:03:48 -0800 | [diff] [blame] | 37 | #include <asm/param.h> /* HZ */ |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 38 | #include "core.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | |
| 40 | #define OSM_NAME "exec-osm" |
| 41 | |
| 42 | struct i2o_driver i2o_exec_driver; |
| 43 | |
| 44 | static int i2o_exec_lct_notify(struct i2o_controller *c, u32 change_ind); |
| 45 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | /* global wait list for POST WAIT */ |
| 47 | static LIST_HEAD(i2o_exec_wait_list); |
| 48 | |
| 49 | /* Wait struct needed for POST WAIT */ |
| 50 | struct i2o_exec_wait { |
| 51 | wait_queue_head_t *wq; /* Pointer to Wait queue */ |
| 52 | struct i2o_dma dma; /* DMA buffers to free on failure */ |
| 53 | u32 tcntxt; /* transaction context from reply */ |
| 54 | int complete; /* 1 if reply received otherwise 0 */ |
| 55 | u32 m; /* message id */ |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 56 | struct i2o_message *msg; /* pointer to the reply message */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | struct list_head list; /* node in global wait list */ |
Markus Lidel | 57a62fe | 2006-06-10 09:54:14 -0700 | [diff] [blame] | 58 | spinlock_t lock; /* lock before modifying */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | }; |
| 60 | |
Vasily Averin | 071a651 | 2006-03-05 23:18:14 +0100 | [diff] [blame] | 61 | /* Work struct needed to handle LCT NOTIFY replies */ |
| 62 | struct i2o_exec_lct_notify_work { |
| 63 | struct work_struct work; /* work struct */ |
| 64 | struct i2o_controller *c; /* controller on which the LCT NOTIFY |
| 65 | was received */ |
| 66 | }; |
| 67 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | /* Exec OSM class handling definition */ |
| 69 | static struct i2o_class_id i2o_exec_class_id[] = { |
| 70 | {I2O_CLASS_EXECUTIVE}, |
| 71 | {I2O_CLASS_END} |
| 72 | }; |
| 73 | |
| 74 | /** |
| 75 | * i2o_exec_wait_alloc - Allocate a i2o_exec_wait struct an initialize it |
| 76 | * |
| 77 | * Allocate the i2o_exec_wait struct and initialize the wait. |
| 78 | * |
| 79 | * Returns i2o_exec_wait pointer on success or negative error code on |
| 80 | * failure. |
| 81 | */ |
| 82 | static struct i2o_exec_wait *i2o_exec_wait_alloc(void) |
| 83 | { |
| 84 | struct i2o_exec_wait *wait; |
| 85 | |
Markus Lidel | f6ed39a | 2006-01-06 00:19:33 -0800 | [diff] [blame] | 86 | wait = kzalloc(sizeof(*wait), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | if (!wait) |
Markus Lidel | 793fd15 | 2006-01-06 00:19:30 -0800 | [diff] [blame] | 88 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | INIT_LIST_HEAD(&wait->list); |
Markus Lidel | 57a62fe | 2006-06-10 09:54:14 -0700 | [diff] [blame] | 91 | spin_lock_init(&wait->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | |
| 93 | return wait; |
| 94 | }; |
| 95 | |
| 96 | /** |
| 97 | * i2o_exec_wait_free - Free a i2o_exec_wait struct |
| 98 | * @i2o_exec_wait: I2O wait data which should be cleaned up |
| 99 | */ |
| 100 | static void i2o_exec_wait_free(struct i2o_exec_wait *wait) |
| 101 | { |
| 102 | kfree(wait); |
| 103 | }; |
| 104 | |
| 105 | /** |
| 106 | * i2o_msg_post_wait_mem - Post and wait a message with DMA buffers |
| 107 | * @c: controller |
| 108 | * @m: message to post |
| 109 | * @timeout: time in seconds to wait |
| 110 | * @dma: i2o_dma struct of the DMA buffer to free on failure |
| 111 | * |
| 112 | * This API allows an OSM to post a message and then be told whether or |
| 113 | * not the system received a successful reply. If the message times out |
| 114 | * then the value '-ETIMEDOUT' is returned. This is a special case. In |
| 115 | * this situation the message may (should) complete at an indefinite time |
| 116 | * in the future. When it completes it will use the memory buffer |
| 117 | * attached to the request. If -ETIMEDOUT is returned then the memory |
| 118 | * buffer must not be freed. Instead the event completion will free them |
| 119 | * for you. In all other cases the buffer are your problem. |
| 120 | * |
Markus Lidel | f88e119 | 2005-06-23 22:02:14 -0700 | [diff] [blame] | 121 | * Returns 0 on success, negative error code on timeout or positive error |
| 122 | * code from reply. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | */ |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 124 | int i2o_msg_post_wait_mem(struct i2o_controller *c, struct i2o_message *msg, |
| 125 | unsigned long timeout, struct i2o_dma *dma) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | { |
| 127 | DECLARE_WAIT_QUEUE_HEAD(wq); |
| 128 | struct i2o_exec_wait *wait; |
| 129 | static u32 tcntxt = 0x80000000; |
Markus Lidel | 57a62fe | 2006-06-10 09:54:14 -0700 | [diff] [blame] | 130 | long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | int rc = 0; |
| 132 | |
| 133 | wait = i2o_exec_wait_alloc(); |
| 134 | if (!wait) |
| 135 | return -ENOMEM; |
| 136 | |
| 137 | if (tcntxt == 0xffffffff) |
| 138 | tcntxt = 0x80000000; |
| 139 | |
| 140 | if (dma) |
| 141 | wait->dma = *dma; |
| 142 | |
| 143 | /* |
| 144 | * Fill in the message initiator context and transaction context. |
| 145 | * We will only use transaction contexts >= 0x80000000 for POST WAIT, |
| 146 | * so we could find a POST WAIT reply easier in the reply handler. |
| 147 | */ |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 148 | msg->u.s.icntxt = cpu_to_le32(i2o_exec_driver.context); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | wait->tcntxt = tcntxt++; |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 150 | msg->u.s.tcntxt = cpu_to_le32(wait->tcntxt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | |
Markus Lidel | 57a62fe | 2006-06-10 09:54:14 -0700 | [diff] [blame] | 152 | wait->wq = &wq; |
| 153 | /* |
| 154 | * we add elements to the head, because if a entry in the list will |
| 155 | * never be removed, we have to iterate over it every time |
| 156 | */ |
| 157 | list_add(&wait->list, &i2o_exec_wait_list); |
| 158 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | /* |
| 160 | * Post the message to the controller. At some point later it will |
| 161 | * return. If we time out before it returns then complete will be zero. |
| 162 | */ |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 163 | i2o_msg_post(c, msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | |
Markus Lidel | 57a62fe | 2006-06-10 09:54:14 -0700 | [diff] [blame] | 165 | wait_event_interruptible_timeout(wq, wait->complete, timeout * HZ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | |
Markus Lidel | 57a62fe | 2006-06-10 09:54:14 -0700 | [diff] [blame] | 167 | spin_lock_irqsave(&wait->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | |
Markus Lidel | 57a62fe | 2006-06-10 09:54:14 -0700 | [diff] [blame] | 169 | wait->wq = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | |
Markus Lidel | 57a62fe | 2006-06-10 09:54:14 -0700 | [diff] [blame] | 171 | if (wait->complete) |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 172 | rc = le32_to_cpu(wait->msg->body[0]) >> 24; |
Markus Lidel | 57a62fe | 2006-06-10 09:54:14 -0700 | [diff] [blame] | 173 | else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | /* |
| 175 | * We cannot remove it now. This is important. When it does |
| 176 | * terminate (which it must do if the controller has not |
| 177 | * died...) then it will otherwise scribble on stuff. |
| 178 | * |
| 179 | * FIXME: try abort message |
| 180 | */ |
| 181 | if (dma) |
| 182 | dma->virt = NULL; |
| 183 | |
| 184 | rc = -ETIMEDOUT; |
| 185 | } |
| 186 | |
Markus Lidel | 57a62fe | 2006-06-10 09:54:14 -0700 | [diff] [blame] | 187 | spin_unlock_irqrestore(&wait->lock, flags); |
| 188 | |
| 189 | if (rc != -ETIMEDOUT) { |
| 190 | i2o_flush_reply(c, wait->m); |
| 191 | i2o_exec_wait_free(wait); |
| 192 | } |
| 193 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | return rc; |
| 195 | }; |
| 196 | |
| 197 | /** |
| 198 | * i2o_msg_post_wait_complete - Reply to a i2o_msg_post request from IOP |
| 199 | * @c: I2O controller which answers |
| 200 | * @m: message id |
| 201 | * @msg: pointer to the I2O reply message |
Markus Lidel | f88e119 | 2005-06-23 22:02:14 -0700 | [diff] [blame] | 202 | * @context: transaction context of request |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | * |
| 204 | * This function is called in interrupt context only. If the reply reached |
| 205 | * before the timeout, the i2o_exec_wait struct is filled with the message |
| 206 | * and the task will be waked up. The task is now responsible for returning |
| 207 | * the message m back to the controller! If the message reaches us after |
| 208 | * the timeout clean up the i2o_exec_wait struct (including allocated |
| 209 | * DMA buffer). |
| 210 | * |
| 211 | * Return 0 on success and if the message m should not be given back to the |
| 212 | * I2O controller, or >0 on success and if the message should be given back |
| 213 | * afterwords. Returns negative error code on failure. In this case the |
| 214 | * message must also be given back to the controller. |
| 215 | */ |
| 216 | static int i2o_msg_post_wait_complete(struct i2o_controller *c, u32 m, |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 217 | struct i2o_message *msg, u32 context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | { |
| 219 | struct i2o_exec_wait *wait, *tmp; |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 220 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | int rc = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | |
| 223 | /* |
| 224 | * We need to search through the i2o_exec_wait_list to see if the given |
| 225 | * message is still outstanding. If not, it means that the IOP took |
| 226 | * longer to respond to the message than we had allowed and timer has |
| 227 | * already expired. Not much we can do about that except log it for |
| 228 | * debug purposes, increase timeout, and recompile. |
| 229 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | list_for_each_entry_safe(wait, tmp, &i2o_exec_wait_list, list) { |
| 231 | if (wait->tcntxt == context) { |
Markus Lidel | 57a62fe | 2006-06-10 09:54:14 -0700 | [diff] [blame] | 232 | spin_lock_irqsave(&wait->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | |
Markus Lidel | 57a62fe | 2006-06-10 09:54:14 -0700 | [diff] [blame] | 234 | list_del(&wait->list); |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 235 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | wait->m = m; |
| 237 | wait->msg = msg; |
| 238 | wait->complete = 1; |
| 239 | |
Markus Lidel | 57a62fe | 2006-06-10 09:54:14 -0700 | [diff] [blame] | 240 | if (wait->wq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | rc = 0; |
Markus Lidel | 57a62fe | 2006-06-10 09:54:14 -0700 | [diff] [blame] | 242 | else |
| 243 | rc = -1; |
| 244 | |
| 245 | spin_unlock_irqrestore(&wait->lock, flags); |
| 246 | |
| 247 | if (rc) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | struct device *dev; |
| 249 | |
| 250 | dev = &c->pdev->dev; |
| 251 | |
| 252 | pr_debug("%s: timedout reply received!\n", |
| 253 | c->name); |
| 254 | i2o_dma_free(dev, &wait->dma); |
| 255 | i2o_exec_wait_free(wait); |
Markus Lidel | 57a62fe | 2006-06-10 09:54:14 -0700 | [diff] [blame] | 256 | } else |
| 257 | wake_up_interruptible(wait->wq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | return rc; |
| 260 | } |
| 261 | } |
| 262 | |
Markus Lidel | f88e119 | 2005-06-23 22:02:14 -0700 | [diff] [blame] | 263 | osm_warn("%s: Bogus reply in POST WAIT (tr-context: %08x)!\n", c->name, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | context); |
| 265 | |
| 266 | return -1; |
| 267 | }; |
| 268 | |
| 269 | /** |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 270 | * i2o_exec_show_vendor_id - Displays Vendor ID of controller |
| 271 | * @d: device of which the Vendor ID should be displayed |
| 272 | * @buf: buffer into which the Vendor ID should be printed |
| 273 | * |
| 274 | * Returns number of bytes printed into buffer. |
| 275 | */ |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 276 | static ssize_t i2o_exec_show_vendor_id(struct device *d, |
| 277 | struct device_attribute *attr, char *buf) |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 278 | { |
| 279 | struct i2o_device *dev = to_i2o_device(d); |
| 280 | u16 id; |
| 281 | |
Markus Lidel | 793fd15 | 2006-01-06 00:19:30 -0800 | [diff] [blame] | 282 | if (!i2o_parm_field_get(dev, 0x0000, 0, &id, 2)) { |
| 283 | sprintf(buf, "0x%04x", le16_to_cpu(id)); |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 284 | return strlen(buf) + 1; |
| 285 | } |
| 286 | |
| 287 | return 0; |
| 288 | }; |
| 289 | |
| 290 | /** |
| 291 | * i2o_exec_show_product_id - Displays Product ID of controller |
| 292 | * @d: device of which the Product ID should be displayed |
| 293 | * @buf: buffer into which the Product ID should be printed |
| 294 | * |
| 295 | * Returns number of bytes printed into buffer. |
| 296 | */ |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 297 | static ssize_t i2o_exec_show_product_id(struct device *d, |
| 298 | struct device_attribute *attr, |
| 299 | char *buf) |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 300 | { |
| 301 | struct i2o_device *dev = to_i2o_device(d); |
| 302 | u16 id; |
| 303 | |
Markus Lidel | 793fd15 | 2006-01-06 00:19:30 -0800 | [diff] [blame] | 304 | if (!i2o_parm_field_get(dev, 0x0000, 1, &id, 2)) { |
| 305 | sprintf(buf, "0x%04x", le16_to_cpu(id)); |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 306 | return strlen(buf) + 1; |
| 307 | } |
| 308 | |
| 309 | return 0; |
| 310 | }; |
| 311 | |
| 312 | /* Exec-OSM device attributes */ |
| 313 | static DEVICE_ATTR(vendor_id, S_IRUGO, i2o_exec_show_vendor_id, NULL); |
| 314 | static DEVICE_ATTR(product_id, S_IRUGO, i2o_exec_show_product_id, NULL); |
| 315 | |
| 316 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | * i2o_exec_probe - Called if a new I2O device (executive class) appears |
| 318 | * @dev: I2O device which should be probed |
| 319 | * |
| 320 | * Registers event notification for every event from Executive device. The |
| 321 | * return is always 0, because we want all devices of class Executive. |
| 322 | * |
| 323 | * Returns 0 on success. |
| 324 | */ |
| 325 | static int i2o_exec_probe(struct device *dev) |
| 326 | { |
| 327 | struct i2o_device *i2o_dev = to_i2o_device(dev); |
| 328 | |
| 329 | i2o_event_register(i2o_dev, &i2o_exec_driver, 0, 0xffffffff); |
| 330 | |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 331 | device_create_file(dev, &dev_attr_vendor_id); |
| 332 | device_create_file(dev, &dev_attr_product_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | |
| 334 | return 0; |
| 335 | }; |
| 336 | |
| 337 | /** |
| 338 | * i2o_exec_remove - Called on I2O device removal |
| 339 | * @dev: I2O device which was removed |
| 340 | * |
| 341 | * Unregisters event notification from Executive I2O device. |
| 342 | * |
| 343 | * Returns 0 on success. |
| 344 | */ |
| 345 | static int i2o_exec_remove(struct device *dev) |
| 346 | { |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 347 | device_remove_file(dev, &dev_attr_product_id); |
| 348 | device_remove_file(dev, &dev_attr_vendor_id); |
| 349 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | i2o_event_register(to_i2o_device(dev), &i2o_exec_driver, 0, 0); |
| 351 | |
| 352 | return 0; |
| 353 | }; |
| 354 | |
| 355 | /** |
| 356 | * i2o_exec_lct_modified - Called on LCT NOTIFY reply |
| 357 | * @c: I2O controller on which the LCT has modified |
| 358 | * |
| 359 | * This function handles asynchronus LCT NOTIFY replies. It parses the |
| 360 | * new LCT and if the buffer for the LCT was to small sends a LCT NOTIFY |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 361 | * again, otherwise send LCT NOTIFY to get informed on next LCT change. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | */ |
Vasily Averin | 071a651 | 2006-03-05 23:18:14 +0100 | [diff] [blame] | 363 | static void i2o_exec_lct_modified(struct i2o_exec_lct_notify_work *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | { |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 365 | u32 change_ind = 0; |
Vasily Averin | 071a651 | 2006-03-05 23:18:14 +0100 | [diff] [blame] | 366 | struct i2o_controller *c = work->c; |
| 367 | |
| 368 | kfree(work); |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 369 | |
| 370 | if (i2o_device_parse_lct(c) != -EAGAIN) |
| 371 | change_ind = c->lct->change_ind + 1; |
| 372 | |
Markus Lidel | 793fd15 | 2006-01-06 00:19:30 -0800 | [diff] [blame] | 373 | #ifdef CONFIG_I2O_LCT_NOTIFY_ON_CHANGES |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 374 | i2o_exec_lct_notify(c, change_ind); |
Markus Lidel | 793fd15 | 2006-01-06 00:19:30 -0800 | [diff] [blame] | 375 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | }; |
| 377 | |
| 378 | /** |
| 379 | * i2o_exec_reply - I2O Executive reply handler |
| 380 | * @c: I2O controller from which the reply comes |
| 381 | * @m: message id |
| 382 | * @msg: pointer to the I2O reply message |
| 383 | * |
| 384 | * This function is always called from interrupt context. If a POST WAIT |
| 385 | * reply was received, pass it to the complete function. If a LCT NOTIFY |
| 386 | * reply was received, a new event is created to handle the update. |
| 387 | * |
| 388 | * Returns 0 on success and if the reply should not be flushed or > 0 |
| 389 | * on success and if the reply should be flushed. Returns negative error |
| 390 | * code on failure and if the reply should be flushed. |
| 391 | */ |
| 392 | static int i2o_exec_reply(struct i2o_controller *c, u32 m, |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 393 | struct i2o_message *msg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | { |
Markus Lidel | f88e119 | 2005-06-23 22:02:14 -0700 | [diff] [blame] | 395 | u32 context; |
| 396 | |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 397 | if (le32_to_cpu(msg->u.head[0]) & MSG_FAIL) { |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 398 | struct i2o_message __iomem *pmsg; |
| 399 | u32 pm; |
| 400 | |
Markus Lidel | f88e119 | 2005-06-23 22:02:14 -0700 | [diff] [blame] | 401 | /* |
| 402 | * If Fail bit is set we must take the transaction context of |
| 403 | * the preserved message to find the right request again. |
| 404 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 406 | pm = le32_to_cpu(msg->body[3]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | pmsg = i2o_msg_in_to_virt(c, pm); |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 408 | context = readl(&pmsg->u.s.tcntxt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | |
| 410 | i2o_report_status(KERN_INFO, "i2o_core", msg); |
| 411 | |
Markus Lidel | f88e119 | 2005-06-23 22:02:14 -0700 | [diff] [blame] | 412 | /* Release the preserved msg */ |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 413 | i2o_msg_nop_mfa(c, pm); |
Markus Lidel | f88e119 | 2005-06-23 22:02:14 -0700 | [diff] [blame] | 414 | } else |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 415 | context = le32_to_cpu(msg->u.s.tcntxt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | |
Markus Lidel | f88e119 | 2005-06-23 22:02:14 -0700 | [diff] [blame] | 417 | if (context & 0x80000000) |
| 418 | return i2o_msg_post_wait_complete(c, m, msg, context); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 420 | if ((le32_to_cpu(msg->u.head[1]) >> 24) == I2O_CMD_LCT_NOTIFY) { |
Vasily Averin | 071a651 | 2006-03-05 23:18:14 +0100 | [diff] [blame] | 421 | struct i2o_exec_lct_notify_work *work; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | |
| 423 | pr_debug("%s: LCT notify received\n", c->name); |
| 424 | |
| 425 | work = kmalloc(sizeof(*work), GFP_ATOMIC); |
| 426 | if (!work) |
| 427 | return -ENOMEM; |
| 428 | |
Vasily Averin | 071a651 | 2006-03-05 23:18:14 +0100 | [diff] [blame] | 429 | work->c = c; |
| 430 | |
| 431 | INIT_WORK(&work->work, (void (*)(void *))i2o_exec_lct_modified, |
| 432 | work); |
| 433 | queue_work(i2o_exec_driver.event_queue, &work->work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | return 1; |
| 435 | } |
| 436 | |
| 437 | /* |
| 438 | * If this happens, we want to dump the message to the syslog so |
| 439 | * it can be sent back to the card manufacturer by the end user |
| 440 | * to aid in debugging. |
| 441 | * |
| 442 | */ |
| 443 | printk(KERN_WARNING "%s: Unsolicited message reply sent to core!" |
| 444 | "Message dumped to syslog\n", c->name); |
| 445 | i2o_dump_message(msg); |
| 446 | |
| 447 | return -EFAULT; |
| 448 | } |
| 449 | |
| 450 | /** |
| 451 | * i2o_exec_event - Event handling function |
| 452 | * @evt: Event which occurs |
| 453 | * |
| 454 | * Handles events send by the Executive device. At the moment does not do |
| 455 | * anything useful. |
| 456 | */ |
| 457 | static void i2o_exec_event(struct i2o_event *evt) |
| 458 | { |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 459 | if (likely(evt->i2o_dev)) |
| 460 | osm_debug("Event received from device: %d\n", |
| 461 | evt->i2o_dev->lct_data.tid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | kfree(evt); |
| 463 | }; |
| 464 | |
| 465 | /** |
| 466 | * i2o_exec_lct_get - Get the IOP's Logical Configuration Table |
| 467 | * @c: I2O controller from which the LCT should be fetched |
| 468 | * |
| 469 | * Send a LCT NOTIFY request to the controller, and wait |
| 470 | * I2O_TIMEOUT_LCT_GET seconds until arrival of response. If the LCT is |
| 471 | * to large, retry it. |
| 472 | * |
| 473 | * Returns 0 on success or negative error code on failure. |
| 474 | */ |
| 475 | int i2o_exec_lct_get(struct i2o_controller *c) |
| 476 | { |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 477 | struct i2o_message *msg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | int i = 0; |
| 479 | int rc = -EAGAIN; |
| 480 | |
| 481 | for (i = 1; i <= I2O_LCT_GET_TRIES; i++) { |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 482 | msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET); |
| 483 | if (IS_ERR(msg)) |
| 484 | return PTR_ERR(msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 486 | msg->u.head[0] = |
| 487 | cpu_to_le32(EIGHT_WORD_MSG_SIZE | SGL_OFFSET_6); |
| 488 | msg->u.head[1] = |
| 489 | cpu_to_le32(I2O_CMD_LCT_NOTIFY << 24 | HOST_TID << 12 | |
| 490 | ADAPTER_TID); |
| 491 | msg->body[0] = cpu_to_le32(0xffffffff); |
| 492 | msg->body[1] = cpu_to_le32(0x00000000); |
| 493 | msg->body[2] = cpu_to_le32(0xd0000000 | c->dlct.len); |
| 494 | msg->body[3] = cpu_to_le32(c->dlct.phys); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 496 | rc = i2o_msg_post_wait(c, msg, I2O_TIMEOUT_LCT_GET); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | if (rc < 0) |
| 498 | break; |
| 499 | |
| 500 | rc = i2o_device_parse_lct(c); |
| 501 | if (rc != -EAGAIN) |
| 502 | break; |
| 503 | } |
| 504 | |
| 505 | return rc; |
| 506 | } |
| 507 | |
| 508 | /** |
| 509 | * i2o_exec_lct_notify - Send a asynchronus LCT NOTIFY request |
| 510 | * @c: I2O controller to which the request should be send |
| 511 | * @change_ind: change indicator |
| 512 | * |
| 513 | * This function sends a LCT NOTIFY request to the I2O controller with |
| 514 | * the change indicator change_ind. If the change_ind == 0 the controller |
| 515 | * replies immediately after the request. If change_ind > 0 the reply is |
| 516 | * send after change indicator of the LCT is > change_ind. |
| 517 | */ |
| 518 | static int i2o_exec_lct_notify(struct i2o_controller *c, u32 change_ind) |
| 519 | { |
| 520 | i2o_status_block *sb = c->status_block.virt; |
| 521 | struct device *dev; |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 522 | struct i2o_message *msg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | |
Markus Lidel | 57a62fe | 2006-06-10 09:54:14 -0700 | [diff] [blame] | 524 | down(&c->lct_lock); |
| 525 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | dev = &c->pdev->dev; |
| 527 | |
Markus Lidel | 793fd15 | 2006-01-06 00:19:30 -0800 | [diff] [blame] | 528 | if (i2o_dma_realloc |
| 529 | (dev, &c->dlct, le32_to_cpu(sb->expected_lct_size), GFP_KERNEL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | return -ENOMEM; |
| 531 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 532 | msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET); |
| 533 | if (IS_ERR(msg)) |
| 534 | return PTR_ERR(msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 536 | msg->u.head[0] = cpu_to_le32(EIGHT_WORD_MSG_SIZE | SGL_OFFSET_6); |
| 537 | msg->u.head[1] = cpu_to_le32(I2O_CMD_LCT_NOTIFY << 24 | HOST_TID << 12 | |
| 538 | ADAPTER_TID); |
| 539 | msg->u.s.icntxt = cpu_to_le32(i2o_exec_driver.context); |
| 540 | msg->u.s.tcntxt = cpu_to_le32(0x00000000); |
| 541 | msg->body[0] = cpu_to_le32(0xffffffff); |
| 542 | msg->body[1] = cpu_to_le32(change_ind); |
| 543 | msg->body[2] = cpu_to_le32(0xd0000000 | c->dlct.len); |
| 544 | msg->body[3] = cpu_to_le32(c->dlct.phys); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | |
Markus Lidel | a1a5ea7 | 2006-01-06 00:19:29 -0800 | [diff] [blame] | 546 | i2o_msg_post(c, msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | |
Markus Lidel | 57a62fe | 2006-06-10 09:54:14 -0700 | [diff] [blame] | 548 | up(&c->lct_lock); |
| 549 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | return 0; |
| 551 | }; |
| 552 | |
| 553 | /* Exec OSM driver struct */ |
| 554 | struct i2o_driver i2o_exec_driver = { |
| 555 | .name = OSM_NAME, |
| 556 | .reply = i2o_exec_reply, |
| 557 | .event = i2o_exec_event, |
| 558 | .classes = i2o_exec_class_id, |
| 559 | .driver = { |
| 560 | .probe = i2o_exec_probe, |
| 561 | .remove = i2o_exec_remove, |
| 562 | }, |
| 563 | }; |
| 564 | |
| 565 | /** |
| 566 | * i2o_exec_init - Registers the Exec OSM |
| 567 | * |
| 568 | * Registers the Exec OSM in the I2O core. |
| 569 | * |
| 570 | * Returns 0 on success or negative error code on failure. |
| 571 | */ |
| 572 | int __init i2o_exec_init(void) |
| 573 | { |
| 574 | return i2o_driver_register(&i2o_exec_driver); |
| 575 | }; |
| 576 | |
| 577 | /** |
| 578 | * i2o_exec_exit - Removes the Exec OSM |
| 579 | * |
| 580 | * Unregisters the Exec OSM from the I2O core. |
| 581 | */ |
| 582 | void __exit i2o_exec_exit(void) |
| 583 | { |
| 584 | i2o_driver_unregister(&i2o_exec_driver); |
| 585 | }; |
| 586 | |
| 587 | EXPORT_SYMBOL(i2o_msg_post_wait_mem); |
| 588 | EXPORT_SYMBOL(i2o_exec_lct_get); |