Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Adaptec AAC series RAID controller driver |
| 3 | * (c) Copyright 2001 Red Hat Inc. <alan@redhat.com> |
| 4 | * |
| 5 | * based on the old aacraid driver that is.. |
| 6 | * Adaptec aacraid device driver for Linux. |
| 7 | * |
| 8 | * Copyright (c) 2000 Adaptec, Inc. (aacraid@adaptec.com) |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License as published by |
| 12 | * the Free Software Foundation; either version 2, or (at your option) |
| 13 | * any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | * GNU General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public License |
| 21 | * along with this program; see the file COPYING. If not, write to |
| 22 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
| 23 | * |
| 24 | * Module Name: |
| 25 | * commsup.c |
| 26 | * |
| 27 | * Abstract: Contain all routines that are required for FSA host/adapter |
Mark Haverkamp | 7c00ffa | 2005-05-16 18:28:42 -0700 | [diff] [blame] | 28 | * communication. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | * |
| 30 | */ |
| 31 | |
| 32 | #include <linux/kernel.h> |
| 33 | #include <linux/init.h> |
| 34 | #include <linux/types.h> |
| 35 | #include <linux/sched.h> |
| 36 | #include <linux/pci.h> |
| 37 | #include <linux/spinlock.h> |
| 38 | #include <linux/slab.h> |
| 39 | #include <linux/completion.h> |
| 40 | #include <linux/blkdev.h> |
Mark Haverkamp | 7c00ffa | 2005-05-16 18:28:42 -0700 | [diff] [blame] | 41 | #include <scsi/scsi_host.h> |
Mark Haverkamp | 131256c | 2005-09-26 13:04:56 -0700 | [diff] [blame] | 42 | #include <scsi/scsi_device.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #include <asm/semaphore.h> |
Mark Haverkamp | 9203344 | 2005-09-20 12:56:50 -0700 | [diff] [blame] | 44 | #include <asm/delay.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
| 46 | #include "aacraid.h" |
| 47 | |
| 48 | /** |
| 49 | * fib_map_alloc - allocate the fib objects |
| 50 | * @dev: Adapter to allocate for |
| 51 | * |
| 52 | * Allocate and map the shared PCI space for the FIB blocks used to |
| 53 | * talk to the Adaptec firmware. |
| 54 | */ |
| 55 | |
| 56 | static int fib_map_alloc(struct aac_dev *dev) |
| 57 | { |
Mark Haverkamp | 7c00ffa | 2005-05-16 18:28:42 -0700 | [diff] [blame] | 58 | dprintk((KERN_INFO |
| 59 | "allocate hardware fibs pci_alloc_consistent(%p, %d * (%d + %d), %p)\n", |
| 60 | dev->pdev, dev->max_fib_size, dev->scsi_host_ptr->can_queue, |
| 61 | AAC_NUM_MGT_FIB, &dev->hw_fib_pa)); |
| 62 | if((dev->hw_fib_va = pci_alloc_consistent(dev->pdev, dev->max_fib_size |
| 63 | * (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB), |
| 64 | &dev->hw_fib_pa))==NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | return -ENOMEM; |
| 66 | return 0; |
| 67 | } |
| 68 | |
| 69 | /** |
| 70 | * fib_map_free - free the fib objects |
| 71 | * @dev: Adapter to free |
| 72 | * |
| 73 | * Free the PCI mappings and the memory allocated for FIB blocks |
| 74 | * on this adapter. |
| 75 | */ |
| 76 | |
| 77 | void fib_map_free(struct aac_dev *dev) |
| 78 | { |
Mark Haverkamp | 7c00ffa | 2005-05-16 18:28:42 -0700 | [diff] [blame] | 79 | pci_free_consistent(dev->pdev, dev->max_fib_size * (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB), dev->hw_fib_va, dev->hw_fib_pa); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | } |
| 81 | |
| 82 | /** |
| 83 | * fib_setup - setup the fibs |
| 84 | * @dev: Adapter to set up |
| 85 | * |
| 86 | * Allocate the PCI space for the fibs, map it and then intialise the |
| 87 | * fib area, the unmapped fib data and also the free list |
| 88 | */ |
| 89 | |
| 90 | int fib_setup(struct aac_dev * dev) |
| 91 | { |
| 92 | struct fib *fibptr; |
| 93 | struct hw_fib *hw_fib_va; |
| 94 | dma_addr_t hw_fib_pa; |
| 95 | int i; |
Mark Haverkamp | 7c00ffa | 2005-05-16 18:28:42 -0700 | [diff] [blame] | 96 | |
| 97 | while (((i = fib_map_alloc(dev)) == -ENOMEM) |
| 98 | && (dev->scsi_host_ptr->can_queue > (64 - AAC_NUM_MGT_FIB))) { |
| 99 | dev->init->MaxIoCommands = cpu_to_le32((dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB) >> 1); |
| 100 | dev->scsi_host_ptr->can_queue = le32_to_cpu(dev->init->MaxIoCommands) - AAC_NUM_MGT_FIB; |
| 101 | } |
| 102 | if (i<0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | return -ENOMEM; |
| 104 | |
| 105 | hw_fib_va = dev->hw_fib_va; |
| 106 | hw_fib_pa = dev->hw_fib_pa; |
Mark Haverkamp | 7c00ffa | 2005-05-16 18:28:42 -0700 | [diff] [blame] | 107 | memset(hw_fib_va, 0, dev->max_fib_size * (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | /* |
| 109 | * Initialise the fibs |
| 110 | */ |
Mark Haverkamp | 7c00ffa | 2005-05-16 18:28:42 -0700 | [diff] [blame] | 111 | for (i = 0, fibptr = &dev->fibs[i]; i < (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB); i++, fibptr++) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | { |
| 113 | fibptr->dev = dev; |
| 114 | fibptr->hw_fib = hw_fib_va; |
| 115 | fibptr->data = (void *) fibptr->hw_fib->data; |
| 116 | fibptr->next = fibptr+1; /* Forward chain the fibs */ |
| 117 | init_MUTEX_LOCKED(&fibptr->event_wait); |
| 118 | spin_lock_init(&fibptr->event_lock); |
Mark Haverkamp | 56b5871 | 2005-04-27 06:05:51 -0700 | [diff] [blame] | 119 | hw_fib_va->header.XferState = cpu_to_le32(0xffffffff); |
Mark Haverkamp | 7c00ffa | 2005-05-16 18:28:42 -0700 | [diff] [blame] | 120 | hw_fib_va->header.SenderSize = cpu_to_le16(dev->max_fib_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | fibptr->hw_fib_pa = hw_fib_pa; |
Mark Haverkamp | 7c00ffa | 2005-05-16 18:28:42 -0700 | [diff] [blame] | 122 | hw_fib_va = (struct hw_fib *)((unsigned char *)hw_fib_va + dev->max_fib_size); |
| 123 | hw_fib_pa = hw_fib_pa + dev->max_fib_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | } |
| 125 | /* |
| 126 | * Add the fib chain to the free list |
| 127 | */ |
Mark Haverkamp | 7c00ffa | 2005-05-16 18:28:42 -0700 | [diff] [blame] | 128 | dev->fibs[dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB - 1].next = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | /* |
| 130 | * Enable this to debug out of queue space |
| 131 | */ |
| 132 | dev->free_fib = &dev->fibs[0]; |
| 133 | return 0; |
| 134 | } |
| 135 | |
| 136 | /** |
| 137 | * fib_alloc - allocate a fib |
| 138 | * @dev: Adapter to allocate the fib for |
| 139 | * |
| 140 | * Allocate a fib from the adapter fib pool. If the pool is empty we |
Mark Haverkamp | 7c00ffa | 2005-05-16 18:28:42 -0700 | [diff] [blame] | 141 | * return NULL. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | */ |
| 143 | |
| 144 | struct fib * fib_alloc(struct aac_dev *dev) |
| 145 | { |
| 146 | struct fib * fibptr; |
| 147 | unsigned long flags; |
| 148 | spin_lock_irqsave(&dev->fib_lock, flags); |
| 149 | fibptr = dev->free_fib; |
Mark Haverkamp | 7c00ffa | 2005-05-16 18:28:42 -0700 | [diff] [blame] | 150 | if(!fibptr){ |
| 151 | spin_unlock_irqrestore(&dev->fib_lock, flags); |
| 152 | return fibptr; |
| 153 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | dev->free_fib = fibptr->next; |
| 155 | spin_unlock_irqrestore(&dev->fib_lock, flags); |
| 156 | /* |
| 157 | * Set the proper node type code and node byte size |
| 158 | */ |
| 159 | fibptr->type = FSAFS_NTC_FIB_CONTEXT; |
| 160 | fibptr->size = sizeof(struct fib); |
| 161 | /* |
| 162 | * Null out fields that depend on being zero at the start of |
| 163 | * each I/O |
| 164 | */ |
| 165 | fibptr->hw_fib->header.XferState = 0; |
| 166 | fibptr->callback = NULL; |
| 167 | fibptr->callback_data = NULL; |
| 168 | |
| 169 | return fibptr; |
| 170 | } |
| 171 | |
| 172 | /** |
| 173 | * fib_free - free a fib |
| 174 | * @fibptr: fib to free up |
| 175 | * |
| 176 | * Frees up a fib and places it on the appropriate queue |
| 177 | * (either free or timed out) |
| 178 | */ |
| 179 | |
| 180 | void fib_free(struct fib * fibptr) |
| 181 | { |
| 182 | unsigned long flags; |
| 183 | |
| 184 | spin_lock_irqsave(&fibptr->dev->fib_lock, flags); |
| 185 | if (fibptr->flags & FIB_CONTEXT_FLAG_TIMED_OUT) { |
| 186 | aac_config.fib_timeouts++; |
| 187 | fibptr->next = fibptr->dev->timeout_fib; |
| 188 | fibptr->dev->timeout_fib = fibptr; |
| 189 | } else { |
| 190 | if (fibptr->hw_fib->header.XferState != 0) { |
| 191 | printk(KERN_WARNING "fib_free, XferState != 0, fibptr = 0x%p, XferState = 0x%x\n", |
| 192 | (void*)fibptr, |
| 193 | le32_to_cpu(fibptr->hw_fib->header.XferState)); |
| 194 | } |
| 195 | fibptr->next = fibptr->dev->free_fib; |
| 196 | fibptr->dev->free_fib = fibptr; |
| 197 | } |
| 198 | spin_unlock_irqrestore(&fibptr->dev->fib_lock, flags); |
| 199 | } |
| 200 | |
| 201 | /** |
| 202 | * fib_init - initialise a fib |
| 203 | * @fibptr: The fib to initialize |
| 204 | * |
| 205 | * Set up the generic fib fields ready for use |
| 206 | */ |
| 207 | |
| 208 | void fib_init(struct fib *fibptr) |
| 209 | { |
| 210 | struct hw_fib *hw_fib = fibptr->hw_fib; |
| 211 | |
| 212 | hw_fib->header.StructType = FIB_MAGIC; |
Mark Haverkamp | 7c00ffa | 2005-05-16 18:28:42 -0700 | [diff] [blame] | 213 | hw_fib->header.Size = cpu_to_le16(fibptr->dev->max_fib_size); |
| 214 | hw_fib->header.XferState = cpu_to_le32(HostOwned | FibInitialized | FibEmpty | FastResponseCapable); |
Mark Haverkamp | 8e0c5eb | 2005-10-24 10:52:22 -0700 | [diff] [blame] | 215 | hw_fib->header.SenderFibAddress = 0; /* Filled in later if needed */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | hw_fib->header.ReceiverFibAddress = cpu_to_le32(fibptr->hw_fib_pa); |
Mark Haverkamp | 7c00ffa | 2005-05-16 18:28:42 -0700 | [diff] [blame] | 217 | hw_fib->header.SenderSize = cpu_to_le16(fibptr->dev->max_fib_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | } |
| 219 | |
| 220 | /** |
| 221 | * fib_deallocate - deallocate a fib |
| 222 | * @fibptr: fib to deallocate |
| 223 | * |
| 224 | * Will deallocate and return to the free pool the FIB pointed to by the |
| 225 | * caller. |
| 226 | */ |
| 227 | |
Adrian Bunk | 4833869 | 2005-04-25 19:45:58 -0700 | [diff] [blame] | 228 | static void fib_dealloc(struct fib * fibptr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | { |
| 230 | struct hw_fib *hw_fib = fibptr->hw_fib; |
| 231 | if(hw_fib->header.StructType != FIB_MAGIC) |
| 232 | BUG(); |
| 233 | hw_fib->header.XferState = 0; |
| 234 | } |
| 235 | |
| 236 | /* |
| 237 | * Commuication primitives define and support the queuing method we use to |
| 238 | * support host to adapter commuication. All queue accesses happen through |
| 239 | * these routines and are the only routines which have a knowledge of the |
| 240 | * how these queues are implemented. |
| 241 | */ |
| 242 | |
| 243 | /** |
| 244 | * aac_get_entry - get a queue entry |
| 245 | * @dev: Adapter |
| 246 | * @qid: Queue Number |
| 247 | * @entry: Entry return |
| 248 | * @index: Index return |
| 249 | * @nonotify: notification control |
| 250 | * |
| 251 | * With a priority the routine returns a queue entry if the queue has free entries. If the queue |
| 252 | * is full(no free entries) than no entry is returned and the function returns 0 otherwise 1 is |
| 253 | * returned. |
| 254 | */ |
| 255 | |
| 256 | static int aac_get_entry (struct aac_dev * dev, u32 qid, struct aac_entry **entry, u32 * index, unsigned long *nonotify) |
| 257 | { |
| 258 | struct aac_queue * q; |
Mark Haverkamp | bed30de | 2005-08-03 15:38:51 -0700 | [diff] [blame] | 259 | unsigned long idx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | |
| 261 | /* |
| 262 | * All of the queues wrap when they reach the end, so we check |
| 263 | * to see if they have reached the end and if they have we just |
| 264 | * set the index back to zero. This is a wrap. You could or off |
| 265 | * the high bits in all updates but this is a bit faster I think. |
| 266 | */ |
| 267 | |
| 268 | q = &dev->queues->queue[qid]; |
Mark Haverkamp | bed30de | 2005-08-03 15:38:51 -0700 | [diff] [blame] | 269 | |
| 270 | idx = *index = le32_to_cpu(*(q->headers.producer)); |
| 271 | /* Interrupt Moderation, only interrupt for first two entries */ |
| 272 | if (idx != le32_to_cpu(*(q->headers.consumer))) { |
| 273 | if (--idx == 0) { |
Mark Haverkamp | 1640a2c | 2005-09-20 12:57:11 -0700 | [diff] [blame] | 274 | if (qid == AdapNormCmdQueue) |
Mark Haverkamp | bed30de | 2005-08-03 15:38:51 -0700 | [diff] [blame] | 275 | idx = ADAP_NORM_CMD_ENTRIES; |
Mark Haverkamp | 1640a2c | 2005-09-20 12:57:11 -0700 | [diff] [blame] | 276 | else |
Mark Haverkamp | bed30de | 2005-08-03 15:38:51 -0700 | [diff] [blame] | 277 | idx = ADAP_NORM_RESP_ENTRIES; |
| 278 | } |
| 279 | if (idx != le32_to_cpu(*(q->headers.consumer))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | *nonotify = 1; |
Mark Haverkamp | bed30de | 2005-08-03 15:38:51 -0700 | [diff] [blame] | 281 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | |
Mark Haverkamp | 1640a2c | 2005-09-20 12:57:11 -0700 | [diff] [blame] | 283 | if (qid == AdapNormCmdQueue) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | if (*index >= ADAP_NORM_CMD_ENTRIES) |
| 285 | *index = 0; /* Wrap to front of the Producer Queue. */ |
Mark Haverkamp | 1640a2c | 2005-09-20 12:57:11 -0700 | [diff] [blame] | 286 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | if (*index >= ADAP_NORM_RESP_ENTRIES) |
| 288 | *index = 0; /* Wrap to front of the Producer Queue. */ |
| 289 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | |
| 291 | if ((*index + 1) == le32_to_cpu(*(q->headers.consumer))) { /* Queue is full */ |
Mark Haverkamp | 7c00ffa | 2005-05-16 18:28:42 -0700 | [diff] [blame] | 292 | printk(KERN_WARNING "Queue %d full, %u outstanding.\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | qid, q->numpending); |
| 294 | return 0; |
| 295 | } else { |
| 296 | *entry = q->base + *index; |
| 297 | return 1; |
| 298 | } |
| 299 | } |
| 300 | |
| 301 | /** |
| 302 | * aac_queue_get - get the next free QE |
| 303 | * @dev: Adapter |
| 304 | * @index: Returned index |
| 305 | * @priority: Priority of fib |
| 306 | * @fib: Fib to associate with the queue entry |
| 307 | * @wait: Wait if queue full |
| 308 | * @fibptr: Driver fib object to go with fib |
| 309 | * @nonotify: Don't notify the adapter |
| 310 | * |
| 311 | * Gets the next free QE off the requested priorty adapter command |
| 312 | * queue and associates the Fib with the QE. The QE represented by |
| 313 | * index is ready to insert on the queue when this routine returns |
| 314 | * success. |
| 315 | */ |
| 316 | |
| 317 | static int aac_queue_get(struct aac_dev * dev, u32 * index, u32 qid, struct hw_fib * hw_fib, int wait, struct fib * fibptr, unsigned long *nonotify) |
| 318 | { |
| 319 | struct aac_entry * entry = NULL; |
| 320 | int map = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | |
Mark Haverkamp | 1640a2c | 2005-09-20 12:57:11 -0700 | [diff] [blame] | 322 | if (qid == AdapNormCmdQueue) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | /* if no entries wait for some if caller wants to */ |
| 324 | while (!aac_get_entry(dev, qid, &entry, index, nonotify)) |
| 325 | { |
| 326 | printk(KERN_ERR "GetEntries failed\n"); |
| 327 | } |
| 328 | /* |
| 329 | * Setup queue entry with a command, status and fib mapped |
| 330 | */ |
| 331 | entry->size = cpu_to_le32(le16_to_cpu(hw_fib->header.Size)); |
| 332 | map = 1; |
Mark Haverkamp | 1640a2c | 2005-09-20 12:57:11 -0700 | [diff] [blame] | 333 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | while(!aac_get_entry(dev, qid, &entry, index, nonotify)) |
| 335 | { |
| 336 | /* if no entries wait for some if caller wants to */ |
| 337 | } |
| 338 | /* |
| 339 | * Setup queue entry with command, status and fib mapped |
| 340 | */ |
| 341 | entry->size = cpu_to_le32(le16_to_cpu(hw_fib->header.Size)); |
| 342 | entry->addr = hw_fib->header.SenderFibAddress; |
| 343 | /* Restore adapters pointer to the FIB */ |
| 344 | hw_fib->header.ReceiverFibAddress = hw_fib->header.SenderFibAddress; /* Let the adapter now where to find its data */ |
| 345 | map = 0; |
| 346 | } |
| 347 | /* |
| 348 | * If MapFib is true than we need to map the Fib and put pointers |
| 349 | * in the queue entry. |
| 350 | */ |
| 351 | if (map) |
| 352 | entry->addr = cpu_to_le32(fibptr->hw_fib_pa); |
| 353 | return 0; |
| 354 | } |
| 355 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | /* |
| 357 | * Define the highest level of host to adapter communication routines. |
| 358 | * These routines will support host to adapter FS commuication. These |
| 359 | * routines have no knowledge of the commuication method used. This level |
| 360 | * sends and receives FIBs. This level has no knowledge of how these FIBs |
| 361 | * get passed back and forth. |
| 362 | */ |
| 363 | |
| 364 | /** |
| 365 | * fib_send - send a fib to the adapter |
| 366 | * @command: Command to send |
| 367 | * @fibptr: The fib |
| 368 | * @size: Size of fib data area |
| 369 | * @priority: Priority of Fib |
| 370 | * @wait: Async/sync select |
| 371 | * @reply: True if a reply is wanted |
| 372 | * @callback: Called with reply |
| 373 | * @callback_data: Passed to callback |
| 374 | * |
| 375 | * Sends the requested FIB to the adapter and optionally will wait for a |
| 376 | * response FIB. If the caller does not wish to wait for a response than |
| 377 | * an event to wait on must be supplied. This event will be set when a |
| 378 | * response FIB is received from the adapter. |
| 379 | */ |
| 380 | |
| 381 | int fib_send(u16 command, struct fib * fibptr, unsigned long size, int priority, int wait, int reply, fib_callback callback, void * callback_data) |
| 382 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | struct aac_dev * dev = fibptr->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | struct hw_fib * hw_fib = fibptr->hw_fib; |
| 385 | struct aac_queue * q; |
| 386 | unsigned long flags = 0; |
Mark Haverkamp | 1640a2c | 2005-09-20 12:57:11 -0700 | [diff] [blame] | 387 | unsigned long qflags; |
| 388 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | if (!(hw_fib->header.XferState & cpu_to_le32(HostOwned))) |
| 390 | return -EBUSY; |
| 391 | /* |
| 392 | * There are 5 cases with the wait and reponse requested flags. |
| 393 | * The only invalid cases are if the caller requests to wait and |
| 394 | * does not request a response and if the caller does not want a |
| 395 | * response and the Fib is not allocated from pool. If a response |
| 396 | * is not requesed the Fib will just be deallocaed by the DPC |
| 397 | * routine when the response comes back from the adapter. No |
| 398 | * further processing will be done besides deleting the Fib. We |
| 399 | * will have a debug mode where the adapter can notify the host |
| 400 | * it had a problem and the host can log that fact. |
| 401 | */ |
| 402 | if (wait && !reply) { |
| 403 | return -EINVAL; |
| 404 | } else if (!wait && reply) { |
| 405 | hw_fib->header.XferState |= cpu_to_le32(Async | ResponseExpected); |
| 406 | FIB_COUNTER_INCREMENT(aac_config.AsyncSent); |
| 407 | } else if (!wait && !reply) { |
| 408 | hw_fib->header.XferState |= cpu_to_le32(NoResponseExpected); |
| 409 | FIB_COUNTER_INCREMENT(aac_config.NoResponseSent); |
| 410 | } else if (wait && reply) { |
| 411 | hw_fib->header.XferState |= cpu_to_le32(ResponseExpected); |
| 412 | FIB_COUNTER_INCREMENT(aac_config.NormalSent); |
| 413 | } |
| 414 | /* |
| 415 | * Map the fib into 32bits by using the fib number |
| 416 | */ |
| 417 | |
Mark Haverkamp | 8e0c5eb | 2005-10-24 10:52:22 -0700 | [diff] [blame] | 418 | hw_fib->header.SenderFibAddress = cpu_to_le32(((u32)(fibptr - dev->fibs)) << 2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | hw_fib->header.SenderData = (u32)(fibptr - dev->fibs); |
| 420 | /* |
| 421 | * Set FIB state to indicate where it came from and if we want a |
| 422 | * response from the adapter. Also load the command from the |
| 423 | * caller. |
| 424 | * |
| 425 | * Map the hw fib pointer as a 32bit value |
| 426 | */ |
| 427 | hw_fib->header.Command = cpu_to_le16(command); |
| 428 | hw_fib->header.XferState |= cpu_to_le32(SentFromHost); |
| 429 | fibptr->hw_fib->header.Flags = 0; /* 0 the flags field - internal only*/ |
| 430 | /* |
| 431 | * Set the size of the Fib we want to send to the adapter |
| 432 | */ |
| 433 | hw_fib->header.Size = cpu_to_le16(sizeof(struct aac_fibhdr) + size); |
| 434 | if (le16_to_cpu(hw_fib->header.Size) > le16_to_cpu(hw_fib->header.SenderSize)) { |
| 435 | return -EMSGSIZE; |
| 436 | } |
| 437 | /* |
| 438 | * Get a queue entry connect the FIB to it and send an notify |
| 439 | * the adapter a command is ready. |
| 440 | */ |
Mark Haverkamp | 1640a2c | 2005-09-20 12:57:11 -0700 | [diff] [blame] | 441 | hw_fib->header.XferState |= cpu_to_le32(NormalPriority); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | /* |
| 444 | * Fill in the Callback and CallbackContext if we are not |
| 445 | * going to wait. |
| 446 | */ |
| 447 | if (!wait) { |
| 448 | fibptr->callback = callback; |
| 449 | fibptr->callback_data = callback_data; |
| 450 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | |
| 452 | fibptr->done = 0; |
| 453 | fibptr->flags = 0; |
| 454 | |
Mark Haverkamp | 1640a2c | 2005-09-20 12:57:11 -0700 | [diff] [blame] | 455 | FIB_COUNTER_INCREMENT(aac_config.FibsSent); |
| 456 | |
Mark Haverkamp | 1640a2c | 2005-09-20 12:57:11 -0700 | [diff] [blame] | 457 | dprintk((KERN_DEBUG "Fib contents:.\n")); |
Mark Haverkamp | 8e0c5eb | 2005-10-24 10:52:22 -0700 | [diff] [blame] | 458 | dprintk((KERN_DEBUG " Command = %d.\n", le32_to_cpu(hw_fib->header.Command))); |
| 459 | dprintk((KERN_DEBUG " SubCommand = %d.\n", le32_to_cpu(((struct aac_query_mount *)fib_data(fibptr))->command))); |
| 460 | dprintk((KERN_DEBUG " XferState = %x.\n", le32_to_cpu(hw_fib->header.XferState))); |
Mark Haverkamp | 1640a2c | 2005-09-20 12:57:11 -0700 | [diff] [blame] | 461 | dprintk((KERN_DEBUG " hw_fib va being sent=%p\n",fibptr->hw_fib)); |
| 462 | dprintk((KERN_DEBUG " hw_fib pa being sent=%lx\n",(ulong)fibptr->hw_fib_pa)); |
| 463 | dprintk((KERN_DEBUG " fib being sent=%p\n",fibptr)); |
| 464 | |
| 465 | q = &dev->queues->queue[AdapNormCmdQueue]; |
| 466 | |
| 467 | if(wait) |
| 468 | spin_lock_irqsave(&fibptr->event_lock, flags); |
| 469 | spin_lock_irqsave(q->lock, qflags); |
Mark Haverkamp | 8e0c5eb | 2005-10-24 10:52:22 -0700 | [diff] [blame] | 470 | if (dev->new_comm_interface) { |
| 471 | unsigned long count = 10000000L; /* 50 seconds */ |
| 472 | list_add_tail(&fibptr->queue, &q->pendingq); |
| 473 | q->numpending++; |
| 474 | spin_unlock_irqrestore(q->lock, qflags); |
| 475 | while (aac_adapter_send(fibptr) != 0) { |
| 476 | if (--count == 0) { |
| 477 | if (wait) |
| 478 | spin_unlock_irqrestore(&fibptr->event_lock, flags); |
| 479 | spin_lock_irqsave(q->lock, qflags); |
| 480 | q->numpending--; |
| 481 | list_del(&fibptr->queue); |
| 482 | spin_unlock_irqrestore(q->lock, qflags); |
| 483 | return -ETIMEDOUT; |
| 484 | } |
| 485 | udelay(5); |
| 486 | } |
| 487 | } else { |
| 488 | u32 index; |
| 489 | unsigned long nointr = 0; |
| 490 | aac_queue_get( dev, &index, AdapNormCmdQueue, hw_fib, 1, fibptr, &nointr); |
Mark Haverkamp | 1640a2c | 2005-09-20 12:57:11 -0700 | [diff] [blame] | 491 | |
Mark Haverkamp | 8e0c5eb | 2005-10-24 10:52:22 -0700 | [diff] [blame] | 492 | list_add_tail(&fibptr->queue, &q->pendingq); |
| 493 | q->numpending++; |
| 494 | *(q->headers.producer) = cpu_to_le32(index + 1); |
| 495 | spin_unlock_irqrestore(q->lock, qflags); |
| 496 | dprintk((KERN_DEBUG "fib_send: inserting a queue entry at index %d.\n",index)); |
| 497 | if (!(nointr & aac_config.irq_mod)) |
| 498 | aac_adapter_notify(dev, AdapNormCmdQueue); |
| 499 | } |
| 500 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | /* |
| 502 | * If the caller wanted us to wait for response wait now. |
| 503 | */ |
| 504 | |
| 505 | if (wait) { |
| 506 | spin_unlock_irqrestore(&fibptr->event_lock, flags); |
Mark Haverkamp | 9203344 | 2005-09-20 12:56:50 -0700 | [diff] [blame] | 507 | /* Only set for first known interruptable command */ |
| 508 | if (wait < 0) { |
| 509 | /* |
| 510 | * *VERY* Dangerous to time out a command, the |
| 511 | * assumption is made that we have no hope of |
| 512 | * functioning because an interrupt routing or other |
| 513 | * hardware failure has occurred. |
| 514 | */ |
| 515 | unsigned long count = 36000000L; /* 3 minutes */ |
Mark Haverkamp | 9203344 | 2005-09-20 12:56:50 -0700 | [diff] [blame] | 516 | while (down_trylock(&fibptr->event_wait)) { |
| 517 | if (--count == 0) { |
| 518 | spin_lock_irqsave(q->lock, qflags); |
| 519 | q->numpending--; |
| 520 | list_del(&fibptr->queue); |
| 521 | spin_unlock_irqrestore(q->lock, qflags); |
| 522 | if (wait == -1) { |
| 523 | printk(KERN_ERR "aacraid: fib_send: first asynchronous command timed out.\n" |
| 524 | "Usually a result of a PCI interrupt routing problem;\n" |
| 525 | "update mother board BIOS or consider utilizing one of\n" |
| 526 | "the SAFE mode kernel options (acpi, apic etc)\n"); |
| 527 | } |
| 528 | return -ETIMEDOUT; |
| 529 | } |
| 530 | udelay(5); |
| 531 | } |
| 532 | } else |
| 533 | down(&fibptr->event_wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | if(fibptr->done == 0) |
| 535 | BUG(); |
| 536 | |
| 537 | if((fibptr->flags & FIB_CONTEXT_FLAG_TIMED_OUT)){ |
| 538 | return -ETIMEDOUT; |
| 539 | } else { |
| 540 | return 0; |
| 541 | } |
| 542 | } |
| 543 | /* |
| 544 | * If the user does not want a response than return success otherwise |
| 545 | * return pending |
| 546 | */ |
| 547 | if (reply) |
| 548 | return -EINPROGRESS; |
| 549 | else |
| 550 | return 0; |
| 551 | } |
| 552 | |
| 553 | /** |
| 554 | * aac_consumer_get - get the top of the queue |
| 555 | * @dev: Adapter |
| 556 | * @q: Queue |
| 557 | * @entry: Return entry |
| 558 | * |
| 559 | * Will return a pointer to the entry on the top of the queue requested that |
| 560 | * we are a consumer of, and return the address of the queue entry. It does |
| 561 | * not change the state of the queue. |
| 562 | */ |
| 563 | |
| 564 | int aac_consumer_get(struct aac_dev * dev, struct aac_queue * q, struct aac_entry **entry) |
| 565 | { |
| 566 | u32 index; |
| 567 | int status; |
| 568 | if (le32_to_cpu(*q->headers.producer) == le32_to_cpu(*q->headers.consumer)) { |
| 569 | status = 0; |
| 570 | } else { |
| 571 | /* |
| 572 | * The consumer index must be wrapped if we have reached |
| 573 | * the end of the queue, else we just use the entry |
| 574 | * pointed to by the header index |
| 575 | */ |
| 576 | if (le32_to_cpu(*q->headers.consumer) >= q->entries) |
| 577 | index = 0; |
| 578 | else |
| 579 | index = le32_to_cpu(*q->headers.consumer); |
| 580 | *entry = q->base + index; |
| 581 | status = 1; |
| 582 | } |
| 583 | return(status); |
| 584 | } |
| 585 | |
| 586 | /** |
| 587 | * aac_consumer_free - free consumer entry |
| 588 | * @dev: Adapter |
| 589 | * @q: Queue |
| 590 | * @qid: Queue ident |
| 591 | * |
| 592 | * Frees up the current top of the queue we are a consumer of. If the |
| 593 | * queue was full notify the producer that the queue is no longer full. |
| 594 | */ |
| 595 | |
| 596 | void aac_consumer_free(struct aac_dev * dev, struct aac_queue *q, u32 qid) |
| 597 | { |
| 598 | int wasfull = 0; |
| 599 | u32 notify; |
| 600 | |
| 601 | if ((le32_to_cpu(*q->headers.producer)+1) == le32_to_cpu(*q->headers.consumer)) |
| 602 | wasfull = 1; |
| 603 | |
| 604 | if (le32_to_cpu(*q->headers.consumer) >= q->entries) |
| 605 | *q->headers.consumer = cpu_to_le32(1); |
| 606 | else |
| 607 | *q->headers.consumer = cpu_to_le32(le32_to_cpu(*q->headers.consumer)+1); |
| 608 | |
| 609 | if (wasfull) { |
| 610 | switch (qid) { |
| 611 | |
| 612 | case HostNormCmdQueue: |
| 613 | notify = HostNormCmdNotFull; |
| 614 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | case HostNormRespQueue: |
| 616 | notify = HostNormRespNotFull; |
| 617 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | default: |
| 619 | BUG(); |
| 620 | return; |
| 621 | } |
| 622 | aac_adapter_notify(dev, notify); |
| 623 | } |
| 624 | } |
| 625 | |
| 626 | /** |
| 627 | * fib_adapter_complete - complete adapter issued fib |
| 628 | * @fibptr: fib to complete |
| 629 | * @size: size of fib |
| 630 | * |
| 631 | * Will do all necessary work to complete a FIB that was sent from |
| 632 | * the adapter. |
| 633 | */ |
| 634 | |
| 635 | int fib_adapter_complete(struct fib * fibptr, unsigned short size) |
| 636 | { |
| 637 | struct hw_fib * hw_fib = fibptr->hw_fib; |
| 638 | struct aac_dev * dev = fibptr->dev; |
Mark Haverkamp | 1640a2c | 2005-09-20 12:57:11 -0700 | [diff] [blame] | 639 | struct aac_queue * q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | unsigned long nointr = 0; |
Mark Haverkamp | 1640a2c | 2005-09-20 12:57:11 -0700 | [diff] [blame] | 641 | unsigned long qflags; |
| 642 | |
| 643 | if (hw_fib->header.XferState == 0) { |
Mark Haverkamp | 8e0c5eb | 2005-10-24 10:52:22 -0700 | [diff] [blame] | 644 | if (dev->new_comm_interface) |
| 645 | kfree (hw_fib); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | return 0; |
Mark Haverkamp | 1640a2c | 2005-09-20 12:57:11 -0700 | [diff] [blame] | 647 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | /* |
| 649 | * If we plan to do anything check the structure type first. |
| 650 | */ |
| 651 | if ( hw_fib->header.StructType != FIB_MAGIC ) { |
Mark Haverkamp | 8e0c5eb | 2005-10-24 10:52:22 -0700 | [diff] [blame] | 652 | if (dev->new_comm_interface) |
| 653 | kfree (hw_fib); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | return -EINVAL; |
| 655 | } |
| 656 | /* |
| 657 | * This block handles the case where the adapter had sent us a |
| 658 | * command and we have finished processing the command. We |
| 659 | * call completeFib when we are done processing the command |
| 660 | * and want to send a response back to the adapter. This will |
| 661 | * send the completed cdb to the adapter. |
| 662 | */ |
| 663 | if (hw_fib->header.XferState & cpu_to_le32(SentFromAdapter)) { |
Mark Haverkamp | 8e0c5eb | 2005-10-24 10:52:22 -0700 | [diff] [blame] | 664 | if (dev->new_comm_interface) { |
| 665 | kfree (hw_fib); |
| 666 | } else { |
| 667 | u32 index; |
| 668 | hw_fib->header.XferState |= cpu_to_le32(HostProcessed); |
| 669 | if (size) { |
| 670 | size += sizeof(struct aac_fibhdr); |
| 671 | if (size > le16_to_cpu(hw_fib->header.SenderSize)) |
| 672 | return -EMSGSIZE; |
| 673 | hw_fib->header.Size = cpu_to_le16(size); |
| 674 | } |
| 675 | q = &dev->queues->queue[AdapNormRespQueue]; |
| 676 | spin_lock_irqsave(q->lock, qflags); |
| 677 | aac_queue_get(dev, &index, AdapNormRespQueue, hw_fib, 1, NULL, &nointr); |
| 678 | *(q->headers.producer) = cpu_to_le32(index + 1); |
| 679 | spin_unlock_irqrestore(q->lock, qflags); |
| 680 | if (!(nointr & (int)aac_config.irq_mod)) |
| 681 | aac_adapter_notify(dev, AdapNormRespQueue); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | } |
| 683 | } |
| 684 | else |
| 685 | { |
| 686 | printk(KERN_WARNING "fib_adapter_complete: Unknown xferstate detected.\n"); |
| 687 | BUG(); |
| 688 | } |
| 689 | return 0; |
| 690 | } |
| 691 | |
| 692 | /** |
| 693 | * fib_complete - fib completion handler |
| 694 | * @fib: FIB to complete |
| 695 | * |
| 696 | * Will do all necessary work to complete a FIB. |
| 697 | */ |
| 698 | |
| 699 | int fib_complete(struct fib * fibptr) |
| 700 | { |
| 701 | struct hw_fib * hw_fib = fibptr->hw_fib; |
| 702 | |
| 703 | /* |
| 704 | * Check for a fib which has already been completed |
| 705 | */ |
| 706 | |
| 707 | if (hw_fib->header.XferState == 0) |
| 708 | return 0; |
| 709 | /* |
| 710 | * If we plan to do anything check the structure type first. |
| 711 | */ |
| 712 | |
| 713 | if (hw_fib->header.StructType != FIB_MAGIC) |
| 714 | return -EINVAL; |
| 715 | /* |
| 716 | * This block completes a cdb which orginated on the host and we |
| 717 | * just need to deallocate the cdb or reinit it. At this point the |
| 718 | * command is complete that we had sent to the adapter and this |
| 719 | * cdb could be reused. |
| 720 | */ |
| 721 | if((hw_fib->header.XferState & cpu_to_le32(SentFromHost)) && |
| 722 | (hw_fib->header.XferState & cpu_to_le32(AdapterProcessed))) |
| 723 | { |
| 724 | fib_dealloc(fibptr); |
| 725 | } |
| 726 | else if(hw_fib->header.XferState & cpu_to_le32(SentFromHost)) |
| 727 | { |
| 728 | /* |
| 729 | * This handles the case when the host has aborted the I/O |
| 730 | * to the adapter because the adapter is not responding |
| 731 | */ |
| 732 | fib_dealloc(fibptr); |
| 733 | } else if(hw_fib->header.XferState & cpu_to_le32(HostOwned)) { |
| 734 | fib_dealloc(fibptr); |
| 735 | } else { |
| 736 | BUG(); |
| 737 | } |
| 738 | return 0; |
| 739 | } |
| 740 | |
| 741 | /** |
| 742 | * aac_printf - handle printf from firmware |
| 743 | * @dev: Adapter |
| 744 | * @val: Message info |
| 745 | * |
| 746 | * Print a message passed to us by the controller firmware on the |
| 747 | * Adaptec board |
| 748 | */ |
| 749 | |
| 750 | void aac_printf(struct aac_dev *dev, u32 val) |
| 751 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | char *cp = dev->printfbuf; |
Mark Haverkamp | 7c00ffa | 2005-05-16 18:28:42 -0700 | [diff] [blame] | 753 | if (dev->printf_enabled) |
| 754 | { |
| 755 | int length = val & 0xffff; |
| 756 | int level = (val >> 16) & 0xffff; |
| 757 | |
| 758 | /* |
| 759 | * The size of the printfbuf is set in port.c |
| 760 | * There is no variable or define for it |
| 761 | */ |
| 762 | if (length > 255) |
| 763 | length = 255; |
| 764 | if (cp[length] != 0) |
| 765 | cp[length] = 0; |
| 766 | if (level == LOG_AAC_HIGH_ERROR) |
| 767 | printk(KERN_WARNING "aacraid:%s", cp); |
| 768 | else |
| 769 | printk(KERN_INFO "aacraid:%s", cp); |
| 770 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 771 | memset(cp, 0, 256); |
| 772 | } |
| 773 | |
Mark Haverkamp | 131256c | 2005-09-26 13:04:56 -0700 | [diff] [blame] | 774 | |
| 775 | /** |
| 776 | * aac_handle_aif - Handle a message from the firmware |
| 777 | * @dev: Which adapter this fib is from |
| 778 | * @fibptr: Pointer to fibptr from adapter |
| 779 | * |
| 780 | * This routine handles a driver notify fib from the adapter and |
| 781 | * dispatches it to the appropriate routine for handling. |
| 782 | */ |
| 783 | |
| 784 | static void aac_handle_aif(struct aac_dev * dev, struct fib * fibptr) |
| 785 | { |
| 786 | struct hw_fib * hw_fib = fibptr->hw_fib; |
| 787 | struct aac_aifcmd * aifcmd = (struct aac_aifcmd *)hw_fib->data; |
| 788 | int busy; |
| 789 | u32 container; |
| 790 | struct scsi_device *device; |
| 791 | enum { |
| 792 | NOTHING, |
| 793 | DELETE, |
| 794 | ADD, |
| 795 | CHANGE |
| 796 | } device_config_needed; |
| 797 | |
| 798 | /* Sniff for container changes */ |
| 799 | |
| 800 | if (!dev) |
| 801 | return; |
| 802 | container = (u32)-1; |
| 803 | |
| 804 | /* |
| 805 | * We have set this up to try and minimize the number of |
| 806 | * re-configures that take place. As a result of this when |
| 807 | * certain AIF's come in we will set a flag waiting for another |
| 808 | * type of AIF before setting the re-config flag. |
| 809 | */ |
| 810 | switch (le32_to_cpu(aifcmd->command)) { |
| 811 | case AifCmdDriverNotify: |
| 812 | switch (le32_to_cpu(((u32 *)aifcmd->data)[0])) { |
| 813 | /* |
| 814 | * Morph or Expand complete |
| 815 | */ |
| 816 | case AifDenMorphComplete: |
| 817 | case AifDenVolumeExtendComplete: |
| 818 | container = le32_to_cpu(((u32 *)aifcmd->data)[1]); |
| 819 | if (container >= dev->maximum_num_containers) |
| 820 | break; |
| 821 | |
| 822 | /* |
| 823 | * Find the Scsi_Device associated with the SCSI |
| 824 | * address. Make sure we have the right array, and if |
| 825 | * so set the flag to initiate a new re-config once we |
| 826 | * see an AifEnConfigChange AIF come through. |
| 827 | */ |
| 828 | |
| 829 | if ((dev != NULL) && (dev->scsi_host_ptr != NULL)) { |
| 830 | device = scsi_device_lookup(dev->scsi_host_ptr, |
| 831 | CONTAINER_TO_CHANNEL(container), |
| 832 | CONTAINER_TO_ID(container), |
| 833 | CONTAINER_TO_LUN(container)); |
| 834 | if (device) { |
| 835 | dev->fsa_dev[container].config_needed = CHANGE; |
| 836 | dev->fsa_dev[container].config_waiting_on = AifEnConfigChange; |
| 837 | scsi_device_put(device); |
| 838 | } |
| 839 | } |
| 840 | } |
| 841 | |
| 842 | /* |
| 843 | * If we are waiting on something and this happens to be |
| 844 | * that thing then set the re-configure flag. |
| 845 | */ |
| 846 | if (container != (u32)-1) { |
| 847 | if (container >= dev->maximum_num_containers) |
| 848 | break; |
| 849 | if (dev->fsa_dev[container].config_waiting_on == |
| 850 | le32_to_cpu(*(u32 *)aifcmd->data)) |
| 851 | dev->fsa_dev[container].config_waiting_on = 0; |
| 852 | } else for (container = 0; |
| 853 | container < dev->maximum_num_containers; ++container) { |
| 854 | if (dev->fsa_dev[container].config_waiting_on == |
| 855 | le32_to_cpu(*(u32 *)aifcmd->data)) |
| 856 | dev->fsa_dev[container].config_waiting_on = 0; |
| 857 | } |
| 858 | break; |
| 859 | |
| 860 | case AifCmdEventNotify: |
| 861 | switch (le32_to_cpu(((u32 *)aifcmd->data)[0])) { |
| 862 | /* |
| 863 | * Add an Array. |
| 864 | */ |
| 865 | case AifEnAddContainer: |
| 866 | container = le32_to_cpu(((u32 *)aifcmd->data)[1]); |
| 867 | if (container >= dev->maximum_num_containers) |
| 868 | break; |
| 869 | dev->fsa_dev[container].config_needed = ADD; |
| 870 | dev->fsa_dev[container].config_waiting_on = |
| 871 | AifEnConfigChange; |
| 872 | break; |
| 873 | |
| 874 | /* |
| 875 | * Delete an Array. |
| 876 | */ |
| 877 | case AifEnDeleteContainer: |
| 878 | container = le32_to_cpu(((u32 *)aifcmd->data)[1]); |
| 879 | if (container >= dev->maximum_num_containers) |
| 880 | break; |
| 881 | dev->fsa_dev[container].config_needed = DELETE; |
| 882 | dev->fsa_dev[container].config_waiting_on = |
| 883 | AifEnConfigChange; |
| 884 | break; |
| 885 | |
| 886 | /* |
| 887 | * Container change detected. If we currently are not |
| 888 | * waiting on something else, setup to wait on a Config Change. |
| 889 | */ |
| 890 | case AifEnContainerChange: |
| 891 | container = le32_to_cpu(((u32 *)aifcmd->data)[1]); |
| 892 | if (container >= dev->maximum_num_containers) |
| 893 | break; |
| 894 | if (dev->fsa_dev[container].config_waiting_on) |
| 895 | break; |
| 896 | dev->fsa_dev[container].config_needed = CHANGE; |
| 897 | dev->fsa_dev[container].config_waiting_on = |
| 898 | AifEnConfigChange; |
| 899 | break; |
| 900 | |
| 901 | case AifEnConfigChange: |
| 902 | break; |
| 903 | |
| 904 | } |
| 905 | |
| 906 | /* |
| 907 | * If we are waiting on something and this happens to be |
| 908 | * that thing then set the re-configure flag. |
| 909 | */ |
| 910 | if (container != (u32)-1) { |
| 911 | if (container >= dev->maximum_num_containers) |
| 912 | break; |
| 913 | if (dev->fsa_dev[container].config_waiting_on == |
| 914 | le32_to_cpu(*(u32 *)aifcmd->data)) |
| 915 | dev->fsa_dev[container].config_waiting_on = 0; |
| 916 | } else for (container = 0; |
| 917 | container < dev->maximum_num_containers; ++container) { |
| 918 | if (dev->fsa_dev[container].config_waiting_on == |
| 919 | le32_to_cpu(*(u32 *)aifcmd->data)) |
| 920 | dev->fsa_dev[container].config_waiting_on = 0; |
| 921 | } |
| 922 | break; |
| 923 | |
| 924 | case AifCmdJobProgress: |
| 925 | /* |
| 926 | * These are job progress AIF's. When a Clear is being |
| 927 | * done on a container it is initially created then hidden from |
| 928 | * the OS. When the clear completes we don't get a config |
| 929 | * change so we monitor the job status complete on a clear then |
| 930 | * wait for a container change. |
| 931 | */ |
| 932 | |
| 933 | if ((((u32 *)aifcmd->data)[1] == cpu_to_le32(AifJobCtrZero)) |
| 934 | && ((((u32 *)aifcmd->data)[6] == ((u32 *)aifcmd->data)[5]) |
| 935 | || (((u32 *)aifcmd->data)[4] == cpu_to_le32(AifJobStsSuccess)))) { |
| 936 | for (container = 0; |
| 937 | container < dev->maximum_num_containers; |
| 938 | ++container) { |
| 939 | /* |
| 940 | * Stomp on all config sequencing for all |
| 941 | * containers? |
| 942 | */ |
| 943 | dev->fsa_dev[container].config_waiting_on = |
| 944 | AifEnContainerChange; |
| 945 | dev->fsa_dev[container].config_needed = ADD; |
| 946 | } |
| 947 | } |
| 948 | if ((((u32 *)aifcmd->data)[1] == cpu_to_le32(AifJobCtrZero)) |
| 949 | && (((u32 *)aifcmd->data)[6] == 0) |
| 950 | && (((u32 *)aifcmd->data)[4] == cpu_to_le32(AifJobStsRunning))) { |
| 951 | for (container = 0; |
| 952 | container < dev->maximum_num_containers; |
| 953 | ++container) { |
| 954 | /* |
| 955 | * Stomp on all config sequencing for all |
| 956 | * containers? |
| 957 | */ |
| 958 | dev->fsa_dev[container].config_waiting_on = |
| 959 | AifEnContainerChange; |
| 960 | dev->fsa_dev[container].config_needed = DELETE; |
| 961 | } |
| 962 | } |
| 963 | break; |
| 964 | } |
| 965 | |
| 966 | device_config_needed = NOTHING; |
| 967 | for (container = 0; container < dev->maximum_num_containers; |
| 968 | ++container) { |
| 969 | if ((dev->fsa_dev[container].config_waiting_on == 0) |
| 970 | && (dev->fsa_dev[container].config_needed != NOTHING)) { |
| 971 | device_config_needed = |
| 972 | dev->fsa_dev[container].config_needed; |
| 973 | dev->fsa_dev[container].config_needed = NOTHING; |
| 974 | break; |
| 975 | } |
| 976 | } |
| 977 | if (device_config_needed == NOTHING) |
| 978 | return; |
| 979 | |
| 980 | /* |
| 981 | * If we decided that a re-configuration needs to be done, |
| 982 | * schedule it here on the way out the door, please close the door |
| 983 | * behind you. |
| 984 | */ |
| 985 | |
| 986 | busy = 0; |
| 987 | |
| 988 | |
| 989 | /* |
| 990 | * Find the Scsi_Device associated with the SCSI address, |
| 991 | * and mark it as changed, invalidating the cache. This deals |
| 992 | * with changes to existing device IDs. |
| 993 | */ |
| 994 | |
| 995 | if (!dev || !dev->scsi_host_ptr) |
| 996 | return; |
| 997 | /* |
| 998 | * force reload of disk info via probe_container |
| 999 | */ |
| 1000 | if ((device_config_needed == CHANGE) |
| 1001 | && (dev->fsa_dev[container].valid == 1)) |
| 1002 | dev->fsa_dev[container].valid = 2; |
| 1003 | if ((device_config_needed == CHANGE) || |
| 1004 | (device_config_needed == ADD)) |
| 1005 | probe_container(dev, container); |
| 1006 | device = scsi_device_lookup(dev->scsi_host_ptr, |
| 1007 | CONTAINER_TO_CHANNEL(container), |
| 1008 | CONTAINER_TO_ID(container), |
| 1009 | CONTAINER_TO_LUN(container)); |
| 1010 | if (device) { |
| 1011 | switch (device_config_needed) { |
| 1012 | case DELETE: |
| 1013 | scsi_remove_device(device); |
| 1014 | break; |
| 1015 | case CHANGE: |
| 1016 | if (!dev->fsa_dev[container].valid) { |
| 1017 | scsi_remove_device(device); |
| 1018 | break; |
| 1019 | } |
| 1020 | scsi_rescan_device(&device->sdev_gendev); |
| 1021 | |
| 1022 | default: |
| 1023 | break; |
| 1024 | } |
| 1025 | scsi_device_put(device); |
| 1026 | } |
| 1027 | if (device_config_needed == ADD) { |
| 1028 | scsi_add_device(dev->scsi_host_ptr, |
| 1029 | CONTAINER_TO_CHANNEL(container), |
| 1030 | CONTAINER_TO_ID(container), |
| 1031 | CONTAINER_TO_LUN(container)); |
| 1032 | } |
| 1033 | |
| 1034 | } |
| 1035 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1036 | /** |
| 1037 | * aac_command_thread - command processing thread |
| 1038 | * @dev: Adapter to monitor |
| 1039 | * |
| 1040 | * Waits on the commandready event in it's queue. When the event gets set |
| 1041 | * it will pull FIBs off it's queue. It will continue to pull FIBs off |
| 1042 | * until the queue is empty. When the queue is empty it will wait for |
| 1043 | * more FIBs. |
| 1044 | */ |
| 1045 | |
| 1046 | int aac_command_thread(struct aac_dev * dev) |
| 1047 | { |
| 1048 | struct hw_fib *hw_fib, *hw_newfib; |
| 1049 | struct fib *fib, *newfib; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1050 | struct aac_fib_context *fibctx; |
| 1051 | unsigned long flags; |
| 1052 | DECLARE_WAITQUEUE(wait, current); |
| 1053 | |
| 1054 | /* |
| 1055 | * We can only have one thread per adapter for AIF's. |
| 1056 | */ |
| 1057 | if (dev->aif_thread) |
| 1058 | return -EINVAL; |
| 1059 | /* |
| 1060 | * Set up the name that will appear in 'ps' |
| 1061 | * stored in task_struct.comm[16]. |
| 1062 | */ |
| 1063 | daemonize("aacraid"); |
| 1064 | allow_signal(SIGKILL); |
| 1065 | /* |
| 1066 | * Let the DPC know it has a place to send the AIF's to. |
| 1067 | */ |
| 1068 | dev->aif_thread = 1; |
Mark Haverkamp | 2f130980 | 2005-09-26 13:02:15 -0700 | [diff] [blame] | 1069 | add_wait_queue(&dev->queues->queue[HostNormCmdQueue].cmdready, &wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1070 | set_current_state(TASK_INTERRUPTIBLE); |
Mark Haverkamp | 2f130980 | 2005-09-26 13:02:15 -0700 | [diff] [blame] | 1071 | dprintk ((KERN_INFO "aac_command_thread start\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1072 | while(1) |
| 1073 | { |
Mark Haverkamp | 2f130980 | 2005-09-26 13:02:15 -0700 | [diff] [blame] | 1074 | spin_lock_irqsave(dev->queues->queue[HostNormCmdQueue].lock, flags); |
| 1075 | while(!list_empty(&(dev->queues->queue[HostNormCmdQueue].cmdq))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1076 | struct list_head *entry; |
| 1077 | struct aac_aifcmd * aifcmd; |
| 1078 | |
| 1079 | set_current_state(TASK_RUNNING); |
Mark Haverkamp | 2f130980 | 2005-09-26 13:02:15 -0700 | [diff] [blame] | 1080 | |
| 1081 | entry = dev->queues->queue[HostNormCmdQueue].cmdq.next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1082 | list_del(entry); |
Mark Haverkamp | 2f130980 | 2005-09-26 13:02:15 -0700 | [diff] [blame] | 1083 | |
| 1084 | spin_unlock_irqrestore(dev->queues->queue[HostNormCmdQueue].lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1085 | fib = list_entry(entry, struct fib, fiblink); |
| 1086 | /* |
| 1087 | * We will process the FIB here or pass it to a |
| 1088 | * worker thread that is TBD. We Really can't |
| 1089 | * do anything at this point since we don't have |
| 1090 | * anything defined for this thread to do. |
| 1091 | */ |
| 1092 | hw_fib = fib->hw_fib; |
| 1093 | memset(fib, 0, sizeof(struct fib)); |
| 1094 | fib->type = FSAFS_NTC_FIB_CONTEXT; |
| 1095 | fib->size = sizeof( struct fib ); |
| 1096 | fib->hw_fib = hw_fib; |
| 1097 | fib->data = hw_fib->data; |
| 1098 | fib->dev = dev; |
| 1099 | /* |
| 1100 | * We only handle AifRequest fibs from the adapter. |
| 1101 | */ |
| 1102 | aifcmd = (struct aac_aifcmd *) hw_fib->data; |
| 1103 | if (aifcmd->command == cpu_to_le32(AifCmdDriverNotify)) { |
| 1104 | /* Handle Driver Notify Events */ |
Mark Haverkamp | 131256c | 2005-09-26 13:04:56 -0700 | [diff] [blame] | 1105 | aac_handle_aif(dev, fib); |
Mark Haverkamp | 56b5871 | 2005-04-27 06:05:51 -0700 | [diff] [blame] | 1106 | *(__le32 *)hw_fib->data = cpu_to_le32(ST_OK); |
| 1107 | fib_adapter_complete(fib, (u16)sizeof(u32)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1108 | } else { |
| 1109 | struct list_head *entry; |
| 1110 | /* The u32 here is important and intended. We are using |
| 1111 | 32bit wrapping time to fit the adapter field */ |
| 1112 | |
| 1113 | u32 time_now, time_last; |
| 1114 | unsigned long flagv; |
Mark Haverkamp | 2f130980 | 2005-09-26 13:02:15 -0700 | [diff] [blame] | 1115 | unsigned num; |
| 1116 | struct hw_fib ** hw_fib_pool, ** hw_fib_p; |
| 1117 | struct fib ** fib_pool, ** fib_p; |
Mark Haverkamp | 131256c | 2005-09-26 13:04:56 -0700 | [diff] [blame] | 1118 | |
| 1119 | /* Sniff events */ |
| 1120 | if ((aifcmd->command == |
| 1121 | cpu_to_le32(AifCmdEventNotify)) || |
| 1122 | (aifcmd->command == |
| 1123 | cpu_to_le32(AifCmdJobProgress))) { |
| 1124 | aac_handle_aif(dev, fib); |
| 1125 | } |
| 1126 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1127 | time_now = jiffies/HZ; |
| 1128 | |
Mark Haverkamp | 2f130980 | 2005-09-26 13:02:15 -0700 | [diff] [blame] | 1129 | /* |
| 1130 | * Warning: no sleep allowed while |
| 1131 | * holding spinlock. We take the estimate |
| 1132 | * and pre-allocate a set of fibs outside the |
| 1133 | * lock. |
| 1134 | */ |
| 1135 | num = le32_to_cpu(dev->init->AdapterFibsSize) |
| 1136 | / sizeof(struct hw_fib); /* some extra */ |
| 1137 | spin_lock_irqsave(&dev->fib_lock, flagv); |
| 1138 | entry = dev->fib_list.next; |
| 1139 | while (entry != &dev->fib_list) { |
| 1140 | entry = entry->next; |
| 1141 | ++num; |
| 1142 | } |
| 1143 | spin_unlock_irqrestore(&dev->fib_lock, flagv); |
| 1144 | hw_fib_pool = NULL; |
| 1145 | fib_pool = NULL; |
| 1146 | if (num |
| 1147 | && ((hw_fib_pool = kmalloc(sizeof(struct hw_fib *) * num, GFP_KERNEL))) |
| 1148 | && ((fib_pool = kmalloc(sizeof(struct fib *) * num, GFP_KERNEL)))) { |
| 1149 | hw_fib_p = hw_fib_pool; |
| 1150 | fib_p = fib_pool; |
| 1151 | while (hw_fib_p < &hw_fib_pool[num]) { |
| 1152 | if (!(*(hw_fib_p++) = kmalloc(sizeof(struct hw_fib), GFP_KERNEL))) { |
| 1153 | --hw_fib_p; |
| 1154 | break; |
| 1155 | } |
| 1156 | if (!(*(fib_p++) = kmalloc(sizeof(struct fib), GFP_KERNEL))) { |
| 1157 | kfree(*(--hw_fib_p)); |
| 1158 | break; |
| 1159 | } |
| 1160 | } |
| 1161 | if ((num = hw_fib_p - hw_fib_pool) == 0) { |
| 1162 | kfree(fib_pool); |
| 1163 | fib_pool = NULL; |
| 1164 | kfree(hw_fib_pool); |
| 1165 | hw_fib_pool = NULL; |
| 1166 | } |
Jesper Juhl | c9475cb | 2005-11-07 01:01:26 -0800 | [diff] [blame] | 1167 | } else { |
Mark Haverkamp | 2f130980 | 2005-09-26 13:02:15 -0700 | [diff] [blame] | 1168 | kfree(hw_fib_pool); |
| 1169 | hw_fib_pool = NULL; |
| 1170 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1171 | spin_lock_irqsave(&dev->fib_lock, flagv); |
| 1172 | entry = dev->fib_list.next; |
| 1173 | /* |
| 1174 | * For each Context that is on the |
| 1175 | * fibctxList, make a copy of the |
| 1176 | * fib, and then set the event to wake up the |
| 1177 | * thread that is waiting for it. |
| 1178 | */ |
Mark Haverkamp | 2f130980 | 2005-09-26 13:02:15 -0700 | [diff] [blame] | 1179 | hw_fib_p = hw_fib_pool; |
| 1180 | fib_p = fib_pool; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1181 | while (entry != &dev->fib_list) { |
| 1182 | /* |
| 1183 | * Extract the fibctx |
| 1184 | */ |
| 1185 | fibctx = list_entry(entry, struct aac_fib_context, next); |
| 1186 | /* |
| 1187 | * Check if the queue is getting |
| 1188 | * backlogged |
| 1189 | */ |
| 1190 | if (fibctx->count > 20) |
| 1191 | { |
| 1192 | /* |
| 1193 | * It's *not* jiffies folks, |
| 1194 | * but jiffies / HZ so do not |
| 1195 | * panic ... |
| 1196 | */ |
| 1197 | time_last = fibctx->jiffies; |
| 1198 | /* |
| 1199 | * Has it been > 2 minutes |
| 1200 | * since the last read off |
| 1201 | * the queue? |
| 1202 | */ |
| 1203 | if ((time_now - time_last) > 120) { |
| 1204 | entry = entry->next; |
| 1205 | aac_close_fib_context(dev, fibctx); |
| 1206 | continue; |
| 1207 | } |
| 1208 | } |
| 1209 | /* |
| 1210 | * Warning: no sleep allowed while |
| 1211 | * holding spinlock |
| 1212 | */ |
Mark Haverkamp | 2f130980 | 2005-09-26 13:02:15 -0700 | [diff] [blame] | 1213 | if (hw_fib_p < &hw_fib_pool[num]) { |
| 1214 | hw_newfib = *hw_fib_p; |
| 1215 | *(hw_fib_p++) = NULL; |
| 1216 | newfib = *fib_p; |
| 1217 | *(fib_p++) = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1218 | /* |
| 1219 | * Make the copy of the FIB |
| 1220 | */ |
| 1221 | memcpy(hw_newfib, hw_fib, sizeof(struct hw_fib)); |
| 1222 | memcpy(newfib, fib, sizeof(struct fib)); |
| 1223 | newfib->hw_fib = hw_newfib; |
| 1224 | /* |
| 1225 | * Put the FIB onto the |
| 1226 | * fibctx's fibs |
| 1227 | */ |
| 1228 | list_add_tail(&newfib->fiblink, &fibctx->fib_list); |
| 1229 | fibctx->count++; |
| 1230 | /* |
| 1231 | * Set the event to wake up the |
Mark Haverkamp | 2f130980 | 2005-09-26 13:02:15 -0700 | [diff] [blame] | 1232 | * thread that is waiting. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1233 | */ |
| 1234 | up(&fibctx->wait_sem); |
| 1235 | } else { |
| 1236 | printk(KERN_WARNING "aifd: didn't allocate NewFib.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1237 | } |
| 1238 | entry = entry->next; |
| 1239 | } |
| 1240 | /* |
| 1241 | * Set the status of this FIB |
| 1242 | */ |
Mark Haverkamp | 56b5871 | 2005-04-27 06:05:51 -0700 | [diff] [blame] | 1243 | *(__le32 *)hw_fib->data = cpu_to_le32(ST_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1244 | fib_adapter_complete(fib, sizeof(u32)); |
| 1245 | spin_unlock_irqrestore(&dev->fib_lock, flagv); |
Mark Haverkamp | 2f130980 | 2005-09-26 13:02:15 -0700 | [diff] [blame] | 1246 | /* Free up the remaining resources */ |
| 1247 | hw_fib_p = hw_fib_pool; |
| 1248 | fib_p = fib_pool; |
| 1249 | while (hw_fib_p < &hw_fib_pool[num]) { |
Jesper Juhl | c9475cb | 2005-11-07 01:01:26 -0800 | [diff] [blame] | 1250 | kfree(*hw_fib_p); |
| 1251 | kfree(*fib_p); |
Mark Haverkamp | 2f130980 | 2005-09-26 13:02:15 -0700 | [diff] [blame] | 1252 | ++fib_p; |
| 1253 | ++hw_fib_p; |
| 1254 | } |
Jesper Juhl | c9475cb | 2005-11-07 01:01:26 -0800 | [diff] [blame] | 1255 | kfree(hw_fib_pool); |
| 1256 | kfree(fib_pool); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1257 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1258 | kfree(fib); |
Mark Haverkamp | 2f130980 | 2005-09-26 13:02:15 -0700 | [diff] [blame] | 1259 | spin_lock_irqsave(dev->queues->queue[HostNormCmdQueue].lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1260 | } |
| 1261 | /* |
| 1262 | * There are no more AIF's |
| 1263 | */ |
Mark Haverkamp | 2f130980 | 2005-09-26 13:02:15 -0700 | [diff] [blame] | 1264 | spin_unlock_irqrestore(dev->queues->queue[HostNormCmdQueue].lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1265 | schedule(); |
| 1266 | |
| 1267 | if(signal_pending(current)) |
| 1268 | break; |
| 1269 | set_current_state(TASK_INTERRUPTIBLE); |
| 1270 | } |
Mark Haverkamp | 2f130980 | 2005-09-26 13:02:15 -0700 | [diff] [blame] | 1271 | if (dev->queues) |
| 1272 | remove_wait_queue(&dev->queues->queue[HostNormCmdQueue].cmdready, &wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1273 | dev->aif_thread = 0; |
| 1274 | complete_and_exit(&dev->aif_completion, 0); |
Mark Haverkamp | 2f130980 | 2005-09-26 13:02:15 -0700 | [diff] [blame] | 1275 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1276 | } |