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 | * |
Mark Haverkamp | 03d4433 | 2007-03-15 10:27:45 -0700 | [diff] [blame] | 8 | * Copyright (c) 2000-2007 Adaptec, Inc. (aacraid@adaptec.com) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | * dpcsup.c |
| 26 | * |
| 27 | * Abstract: All DPC processing routines for the cyclone board occur here. |
| 28 | * |
| 29 | * |
| 30 | */ |
| 31 | |
| 32 | #include <linux/kernel.h> |
| 33 | #include <linux/init.h> |
| 34 | #include <linux/types.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <linux/spinlock.h> |
| 36 | #include <linux/slab.h> |
| 37 | #include <linux/completion.h> |
| 38 | #include <linux/blkdev.h> |
Matthew Wilcox | 6188e10 | 2008-04-18 22:21:05 -0400 | [diff] [blame] | 39 | #include <linux/semaphore.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | |
| 41 | #include "aacraid.h" |
| 42 | |
| 43 | /** |
| 44 | * aac_response_normal - Handle command replies |
| 45 | * @q: Queue to read from |
| 46 | * |
| 47 | * This DPC routine will be run when the adapter interrupts us to let us |
| 48 | * know there is a response on our normal priority queue. We will pull off |
| 49 | * all QE there are and wake up all the waiters before exiting. We will |
| 50 | * take a spinlock out on the queue before operating on it. |
| 51 | */ |
| 52 | |
| 53 | unsigned int aac_response_normal(struct aac_queue * q) |
| 54 | { |
| 55 | struct aac_dev * dev = q->dev; |
| 56 | struct aac_entry *entry; |
| 57 | struct hw_fib * hwfib; |
| 58 | struct fib * fib; |
| 59 | int consumed = 0; |
| 60 | unsigned long flags; |
| 61 | |
| 62 | spin_lock_irqsave(q->lock, flags); |
| 63 | /* |
| 64 | * Keep pulling response QEs off the response queue and waking |
| 65 | * up the waiters until there are no more QEs. We then return |
| 66 | * back to the system. If no response was requesed we just |
| 67 | * deallocate the Fib here and continue. |
| 68 | */ |
| 69 | while(aac_consumer_get(dev, q, &entry)) |
| 70 | { |
| 71 | int fast; |
| 72 | u32 index = le32_to_cpu(entry->addr); |
| 73 | fast = index & 0x01; |
Mark Haverkamp | 8e0c5eb | 2005-10-24 10:52:22 -0700 | [diff] [blame] | 74 | fib = &dev->fibs[index >> 2]; |
Mark Haverkamp | a8166a5 | 2007-03-15 10:26:22 -0700 | [diff] [blame] | 75 | hwfib = fib->hw_fib_va; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | |
| 77 | aac_consumer_free(dev, q, HostNormRespQueue); |
| 78 | /* |
| 79 | * Remove this fib from the Outstanding I/O queue. |
| 80 | * But only if it has not already been timed out. |
| 81 | * |
| 82 | * If the fib has been timed out already, then just |
| 83 | * continue. The caller has already been notified that |
| 84 | * the fib timed out. |
| 85 | */ |
Mark Haverkamp | 03d4433 | 2007-03-15 10:27:45 -0700 | [diff] [blame] | 86 | dev->queues->queue[AdapNormCmdQueue].numpending--; |
| 87 | |
| 88 | if (unlikely(fib->flags & FIB_CONTEXT_FLAG_TIMED_OUT)) { |
| 89 | spin_unlock_irqrestore(q->lock, flags); |
| 90 | aac_fib_complete(fib); |
| 91 | aac_fib_free(fib); |
| 92 | spin_lock_irqsave(q->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | continue; |
| 94 | } |
| 95 | spin_unlock_irqrestore(q->lock, flags); |
| 96 | |
| 97 | if (fast) { |
| 98 | /* |
| 99 | * Doctor the fib |
| 100 | */ |
Mark Haverkamp | 56b5871 | 2005-04-27 06:05:51 -0700 | [diff] [blame] | 101 | *(__le32 *)hwfib->data = cpu_to_le32(ST_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | hwfib->header.XferState |= cpu_to_le32(AdapterProcessed); |
| 103 | } |
| 104 | |
| 105 | FIB_COUNTER_INCREMENT(aac_config.FibRecved); |
| 106 | |
| 107 | if (hwfib->header.Command == cpu_to_le16(NuFileSystem)) |
| 108 | { |
Mark Haverkamp | 56b5871 | 2005-04-27 06:05:51 -0700 | [diff] [blame] | 109 | __le32 *pstatus = (__le32 *)hwfib->data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | if (*pstatus & cpu_to_le32(0xffff0000)) |
| 111 | *pstatus = cpu_to_le32(ST_OK); |
| 112 | } |
| 113 | if (hwfib->header.XferState & cpu_to_le32(NoResponseExpected | Async)) |
| 114 | { |
| 115 | if (hwfib->header.XferState & cpu_to_le32(NoResponseExpected)) |
| 116 | FIB_COUNTER_INCREMENT(aac_config.NoResponseRecved); |
| 117 | else |
| 118 | FIB_COUNTER_INCREMENT(aac_config.AsyncRecved); |
| 119 | /* |
| 120 | * NOTE: we cannot touch the fib after this |
| 121 | * call, because it may have been deallocated. |
| 122 | */ |
Salyzyn, Mark | b6ef70f | 2008-01-08 13:26:43 -0800 | [diff] [blame] | 123 | fib->flags = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | fib->callback(fib->callback_data, fib); |
| 125 | } else { |
| 126 | unsigned long flagv; |
| 127 | spin_lock_irqsave(&fib->event_lock, flagv); |
Mark Haverkamp | c8f7b07 | 2006-08-03 08:02:24 -0700 | [diff] [blame] | 128 | if (!fib->done) |
| 129 | fib->done = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | up(&fib->event_wait); |
| 131 | spin_unlock_irqrestore(&fib->event_lock, flagv); |
| 132 | FIB_COUNTER_INCREMENT(aac_config.NormalRecved); |
Mark Haverkamp | c8f7b07 | 2006-08-03 08:02:24 -0700 | [diff] [blame] | 133 | if (fib->done == 2) { |
| 134 | aac_fib_complete(fib); |
| 135 | aac_fib_free(fib); |
| 136 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | } |
| 138 | consumed++; |
| 139 | spin_lock_irqsave(q->lock, flags); |
| 140 | } |
| 141 | |
| 142 | if (consumed > aac_config.peak_fibs) |
| 143 | aac_config.peak_fibs = consumed; |
| 144 | if (consumed == 0) |
| 145 | aac_config.zero_fibs++; |
| 146 | |
| 147 | spin_unlock_irqrestore(q->lock, flags); |
| 148 | return 0; |
| 149 | } |
| 150 | |
| 151 | |
| 152 | /** |
| 153 | * aac_command_normal - handle commands |
| 154 | * @q: queue to process |
| 155 | * |
| 156 | * This DPC routine will be queued when the adapter interrupts us to |
| 157 | * let us know there is a command on our normal priority queue. We will |
| 158 | * pull off all QE there are and wake up all the waiters before exiting. |
| 159 | * We will take a spinlock out on the queue before operating on it. |
| 160 | */ |
| 161 | |
| 162 | unsigned int aac_command_normal(struct aac_queue *q) |
| 163 | { |
| 164 | struct aac_dev * dev = q->dev; |
| 165 | struct aac_entry *entry; |
| 166 | unsigned long flags; |
| 167 | |
| 168 | spin_lock_irqsave(q->lock, flags); |
| 169 | |
| 170 | /* |
| 171 | * Keep pulling response QEs off the response queue and waking |
| 172 | * up the waiters until there are no more QEs. We then return |
| 173 | * back to the system. |
| 174 | */ |
| 175 | while(aac_consumer_get(dev, q, &entry)) |
| 176 | { |
| 177 | struct fib fibctx; |
| 178 | struct hw_fib * hw_fib; |
| 179 | u32 index; |
| 180 | struct fib *fib = &fibctx; |
| 181 | |
| 182 | index = le32_to_cpu(entry->addr) / sizeof(struct hw_fib); |
| 183 | hw_fib = &dev->aif_base_va[index]; |
| 184 | |
| 185 | /* |
| 186 | * Allocate a FIB at all costs. For non queued stuff |
| 187 | * we can just use the stack so we are happy. We need |
| 188 | * a fib object in order to manage the linked lists |
| 189 | */ |
| 190 | if (dev->aif_thread) |
| 191 | if((fib = kmalloc(sizeof(struct fib), GFP_ATOMIC)) == NULL) |
| 192 | fib = &fibctx; |
| 193 | |
| 194 | memset(fib, 0, sizeof(struct fib)); |
| 195 | INIT_LIST_HEAD(&fib->fiblink); |
| 196 | fib->type = FSAFS_NTC_FIB_CONTEXT; |
| 197 | fib->size = sizeof(struct fib); |
Mark Haverkamp | a8166a5 | 2007-03-15 10:26:22 -0700 | [diff] [blame] | 198 | fib->hw_fib_va = hw_fib; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | fib->data = hw_fib->data; |
| 200 | fib->dev = dev; |
| 201 | |
| 202 | |
| 203 | if (dev->aif_thread && fib != &fibctx) { |
| 204 | list_add_tail(&fib->fiblink, &q->cmdq); |
| 205 | aac_consumer_free(dev, q, HostNormCmdQueue); |
| 206 | wake_up_interruptible(&q->cmdready); |
| 207 | } else { |
| 208 | aac_consumer_free(dev, q, HostNormCmdQueue); |
| 209 | spin_unlock_irqrestore(q->lock, flags); |
| 210 | /* |
| 211 | * Set the status of this FIB |
| 212 | */ |
Mark Haverkamp | 56b5871 | 2005-04-27 06:05:51 -0700 | [diff] [blame] | 213 | *(__le32 *)hw_fib->data = cpu_to_le32(ST_OK); |
Mark Haverkamp | bfb35aa8 | 2006-02-01 09:30:55 -0800 | [diff] [blame] | 214 | aac_fib_adapter_complete(fib, sizeof(u32)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | spin_lock_irqsave(q->lock, flags); |
| 216 | } |
| 217 | } |
| 218 | spin_unlock_irqrestore(q->lock, flags); |
| 219 | return 0; |
| 220 | } |
Mark Haverkamp | 8e0c5eb | 2005-10-24 10:52:22 -0700 | [diff] [blame] | 221 | |
| 222 | |
| 223 | /** |
| 224 | * aac_intr_normal - Handle command replies |
| 225 | * @dev: Device |
| 226 | * @index: completion reference |
| 227 | * |
| 228 | * This DPC routine will be run when the adapter interrupts us to let us |
| 229 | * know there is a response on our normal priority queue. We will pull off |
| 230 | * all QE there are and wake up all the waiters before exiting. |
| 231 | */ |
| 232 | |
Salyzyn, Mark | b6ef70f | 2008-01-08 13:26:43 -0800 | [diff] [blame] | 233 | unsigned int aac_intr_normal(struct aac_dev * dev, u32 index) |
Mark Haverkamp | 8e0c5eb | 2005-10-24 10:52:22 -0700 | [diff] [blame] | 234 | { |
Christoph Hellwig | f3307f7 | 2007-11-08 17:27:47 +0000 | [diff] [blame] | 235 | dprintk((KERN_INFO "aac_intr_normal(%p,%x)\n", dev, index)); |
Mark Haverkamp | 8e0c5eb | 2005-10-24 10:52:22 -0700 | [diff] [blame] | 236 | if ((index & 0x00000002L)) { |
| 237 | struct hw_fib * hw_fib; |
| 238 | struct fib * fib; |
| 239 | struct aac_queue *q = &dev->queues->queue[HostNormCmdQueue]; |
| 240 | unsigned long flags; |
| 241 | |
| 242 | if (index == 0xFFFFFFFEL) /* Special Case */ |
| 243 | return 0; /* Do nothing */ |
| 244 | /* |
| 245 | * Allocate a FIB. For non queued stuff we can just use |
| 246 | * the stack so we are happy. We need a fib object in order to |
| 247 | * manage the linked lists. |
| 248 | */ |
| 249 | if ((!dev->aif_thread) |
Salyzyn, Mark | 4dbc22d | 2007-04-16 11:21:50 -0400 | [diff] [blame] | 250 | || (!(fib = kzalloc(sizeof(struct fib),GFP_ATOMIC)))) |
Mark Haverkamp | 8e0c5eb | 2005-10-24 10:52:22 -0700 | [diff] [blame] | 251 | return 1; |
Salyzyn, Mark | 4dbc22d | 2007-04-16 11:21:50 -0400 | [diff] [blame] | 252 | if (!(hw_fib = kzalloc(sizeof(struct hw_fib),GFP_ATOMIC))) { |
Mark Haverkamp | 8e0c5eb | 2005-10-24 10:52:22 -0700 | [diff] [blame] | 253 | kfree (fib); |
| 254 | return 1; |
| 255 | } |
Al Viro | 142956a | 2007-10-29 05:11:28 +0000 | [diff] [blame] | 256 | memcpy(hw_fib, (struct hw_fib *)(((uintptr_t)(dev->regs.sa)) + |
Salyzyn, Mark | 4dfb7cb | 2007-03-27 15:07:28 -0400 | [diff] [blame] | 257 | (index & ~0x00000002L)), sizeof(struct hw_fib)); |
Mark Haverkamp | 8e0c5eb | 2005-10-24 10:52:22 -0700 | [diff] [blame] | 258 | INIT_LIST_HEAD(&fib->fiblink); |
| 259 | fib->type = FSAFS_NTC_FIB_CONTEXT; |
| 260 | fib->size = sizeof(struct fib); |
Mark Haverkamp | a8166a5 | 2007-03-15 10:26:22 -0700 | [diff] [blame] | 261 | fib->hw_fib_va = hw_fib; |
Mark Haverkamp | 8e0c5eb | 2005-10-24 10:52:22 -0700 | [diff] [blame] | 262 | fib->data = hw_fib->data; |
| 263 | fib->dev = dev; |
| 264 | |
| 265 | spin_lock_irqsave(q->lock, flags); |
| 266 | list_add_tail(&fib->fiblink, &q->cmdq); |
| 267 | wake_up_interruptible(&q->cmdready); |
| 268 | spin_unlock_irqrestore(q->lock, flags); |
| 269 | return 1; |
| 270 | } else { |
| 271 | int fast = index & 0x01; |
| 272 | struct fib * fib = &dev->fibs[index >> 2]; |
Mark Haverkamp | a8166a5 | 2007-03-15 10:26:22 -0700 | [diff] [blame] | 273 | struct hw_fib * hwfib = fib->hw_fib_va; |
Mark Haverkamp | 8e0c5eb | 2005-10-24 10:52:22 -0700 | [diff] [blame] | 274 | |
| 275 | /* |
| 276 | * Remove this fib from the Outstanding I/O queue. |
| 277 | * But only if it has not already been timed out. |
| 278 | * |
| 279 | * If the fib has been timed out already, then just |
| 280 | * continue. The caller has already been notified that |
| 281 | * the fib timed out. |
| 282 | */ |
Mark Haverkamp | 03d4433 | 2007-03-15 10:27:45 -0700 | [diff] [blame] | 283 | dev->queues->queue[AdapNormCmdQueue].numpending--; |
| 284 | |
| 285 | if (unlikely(fib->flags & FIB_CONTEXT_FLAG_TIMED_OUT)) { |
| 286 | aac_fib_complete(fib); |
| 287 | aac_fib_free(fib); |
Mark Haverkamp | 8e0c5eb | 2005-10-24 10:52:22 -0700 | [diff] [blame] | 288 | return 0; |
| 289 | } |
| 290 | |
Mark Haverkamp | 8e0c5eb | 2005-10-24 10:52:22 -0700 | [diff] [blame] | 291 | if (fast) { |
| 292 | /* |
| 293 | * Doctor the fib |
| 294 | */ |
| 295 | *(__le32 *)hwfib->data = cpu_to_le32(ST_OK); |
| 296 | hwfib->header.XferState |= cpu_to_le32(AdapterProcessed); |
| 297 | } |
| 298 | |
| 299 | FIB_COUNTER_INCREMENT(aac_config.FibRecved); |
| 300 | |
| 301 | if (hwfib->header.Command == cpu_to_le16(NuFileSystem)) |
| 302 | { |
Christoph Hellwig | f3307f7 | 2007-11-08 17:27:47 +0000 | [diff] [blame] | 303 | __le32 *pstatus = (__le32 *)hwfib->data; |
Mark Haverkamp | 8e0c5eb | 2005-10-24 10:52:22 -0700 | [diff] [blame] | 304 | if (*pstatus & cpu_to_le32(0xffff0000)) |
| 305 | *pstatus = cpu_to_le32(ST_OK); |
| 306 | } |
| 307 | if (hwfib->header.XferState & cpu_to_le32(NoResponseExpected | Async)) |
| 308 | { |
| 309 | if (hwfib->header.XferState & cpu_to_le32(NoResponseExpected)) |
| 310 | FIB_COUNTER_INCREMENT(aac_config.NoResponseRecved); |
| 311 | else |
| 312 | FIB_COUNTER_INCREMENT(aac_config.AsyncRecved); |
| 313 | /* |
| 314 | * NOTE: we cannot touch the fib after this |
| 315 | * call, because it may have been deallocated. |
| 316 | */ |
Salyzyn, Mark | b6ef70f | 2008-01-08 13:26:43 -0800 | [diff] [blame] | 317 | fib->flags = 0; |
Mark Haverkamp | 8e0c5eb | 2005-10-24 10:52:22 -0700 | [diff] [blame] | 318 | fib->callback(fib->callback_data, fib); |
| 319 | } else { |
| 320 | unsigned long flagv; |
| 321 | dprintk((KERN_INFO "event_wait up\n")); |
| 322 | spin_lock_irqsave(&fib->event_lock, flagv); |
Mark Haverkamp | c8f7b07 | 2006-08-03 08:02:24 -0700 | [diff] [blame] | 323 | if (!fib->done) |
| 324 | fib->done = 1; |
Mark Haverkamp | 8e0c5eb | 2005-10-24 10:52:22 -0700 | [diff] [blame] | 325 | up(&fib->event_wait); |
| 326 | spin_unlock_irqrestore(&fib->event_lock, flagv); |
| 327 | FIB_COUNTER_INCREMENT(aac_config.NormalRecved); |
| 328 | } |
| 329 | return 0; |
| 330 | } |
| 331 | } |