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) 2000-2007 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 * 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> 35 #include <linux/pci.h> 36 #include <linux/spinlock.h> 37 #include <linux/slab.h> 38 #include <linux/completion.h> 39 #include <linux/blkdev.h> 40 #include <asm/semaphore.h> 41 42 #include "aacraid.h" 43 44 /** 45 * aac_response_normal - Handle command replies 46 * @q: Queue to read from 47 * 48 * This DPC routine will be run when the adapter interrupts us to let us 49 * know there is a response on our normal priority queue. We will pull off 50 * all QE there are and wake up all the waiters before exiting. We will 51 * take a spinlock out on the queue before operating on it. 52 */ 53 54 unsigned int aac_response_normal(struct aac_queue * q) 55 { 56 struct aac_dev * dev = q->dev; 57 struct aac_entry *entry; 58 struct hw_fib * hwfib; 59 struct fib * fib; 60 int consumed = 0; 61 unsigned long flags; 62 63 spin_lock_irqsave(q->lock, flags); 64 /* 65 * Keep pulling response QEs off the response queue and waking 66 * up the waiters until there are no more QEs. We then return 67 * back to the system. If no response was requesed we just 68 * deallocate the Fib here and continue. 69 */ 70 while(aac_consumer_get(dev, q, &entry)) 71 { 72 int fast; 73 u32 index = le32_to_cpu(entry->addr); 74 fast = index & 0x01; 75 fib = &dev->fibs[index >> 2]; 76 hwfib = fib->hw_fib_va; 77 78 aac_consumer_free(dev, q, HostNormRespQueue); 79 /* 80 * Remove this fib from the Outstanding I/O queue. 81 * But only if it has not already been timed out. 82 * 83 * If the fib has been timed out already, then just 84 * continue. The caller has already been notified that 85 * the fib timed out. 86 */ 87 dev->queues->queue[AdapNormCmdQueue].numpending--; 88 89 if (unlikely(fib->flags & FIB_CONTEXT_FLAG_TIMED_OUT)) { 90 spin_unlock_irqrestore(q->lock, flags); 91 aac_fib_complete(fib); 92 aac_fib_free(fib); 93 spin_lock_irqsave(q->lock, flags); 94 continue; 95 } 96 spin_unlock_irqrestore(q->lock, flags); 97 98 if (fast) { 99 /* 100 * Doctor the fib 101 */ 102 *(__le32 *)hwfib->data = cpu_to_le32(ST_OK); 103 hwfib->header.XferState |= cpu_to_le32(AdapterProcessed); 104 } 105 106 FIB_COUNTER_INCREMENT(aac_config.FibRecved); 107 108 if (hwfib->header.Command == cpu_to_le16(NuFileSystem)) 109 { 110 __le32 *pstatus = (__le32 *)hwfib->data; 111 if (*pstatus & cpu_to_le32(0xffff0000)) 112 *pstatus = cpu_to_le32(ST_OK); 113 } 114 if (hwfib->header.XferState & cpu_to_le32(NoResponseExpected | Async)) 115 { 116 if (hwfib->header.XferState & cpu_to_le32(NoResponseExpected)) 117 FIB_COUNTER_INCREMENT(aac_config.NoResponseRecved); 118 else 119 FIB_COUNTER_INCREMENT(aac_config.AsyncRecved); 120 /* 121 * NOTE: we cannot touch the fib after this 122 * call, because it may have been deallocated. 123 */ 124 fib->callback(fib->callback_data, fib); 125 } else { 126 unsigned long flagv; 127 spin_lock_irqsave(&fib->event_lock, flagv); 128 if (!fib->done) 129 fib->done = 1; 130 up(&fib->event_wait); 131 spin_unlock_irqrestore(&fib->event_lock, flagv); 132 FIB_COUNTER_INCREMENT(aac_config.NormalRecved); 133 if (fib->done == 2) { 134 aac_fib_complete(fib); 135 aac_fib_free(fib); 136 } 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); 198 fib->hw_fib_va = hw_fib; 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 */ 213 *(__le32 *)hw_fib->data = cpu_to_le32(ST_OK); 214 aac_fib_adapter_complete(fib, sizeof(u32)); 215 spin_lock_irqsave(q->lock, flags); 216 } 217 } 218 spin_unlock_irqrestore(q->lock, flags); 219 return 0; 220 } 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 */ 232 233 unsigned int aac_intr_normal(struct aac_dev * dev, u32 Index) 234 { 235 u32 index = le32_to_cpu(Index); 236 237 dprintk((KERN_INFO "aac_intr_normal(%p,%x)\n", dev, Index)); 238 if ((index & 0x00000002L)) { 239 struct hw_fib * hw_fib; 240 struct fib * fib; 241 struct aac_queue *q = &dev->queues->queue[HostNormCmdQueue]; 242 unsigned long flags; 243 244 if (index == 0xFFFFFFFEL) /* Special Case */ 245 return 0; /* Do nothing */ 246 /* 247 * Allocate a FIB. For non queued stuff we can just use 248 * the stack so we are happy. We need a fib object in order to 249 * manage the linked lists. 250 */ 251 if ((!dev->aif_thread) 252 || (!(fib = kmalloc(sizeof(struct fib),GFP_ATOMIC)))) 253 return 1; 254 if (!(hw_fib = kmalloc(sizeof(struct hw_fib),GFP_ATOMIC))) { 255 kfree (fib); 256 return 1; 257 } 258 memset(hw_fib, 0, sizeof(struct hw_fib)); 259 memcpy(hw_fib, (struct hw_fib *)(((unsigned long)(dev->regs.sa)) + (index & ~0x00000002L)), sizeof(struct hw_fib)); 260 memset(fib, 0, sizeof(struct fib)); 261 INIT_LIST_HEAD(&fib->fiblink); 262 fib->type = FSAFS_NTC_FIB_CONTEXT; 263 fib->size = sizeof(struct fib); 264 fib->hw_fib_va = hw_fib; 265 fib->data = hw_fib->data; 266 fib->dev = dev; 267 268 spin_lock_irqsave(q->lock, flags); 269 list_add_tail(&fib->fiblink, &q->cmdq); 270 wake_up_interruptible(&q->cmdready); 271 spin_unlock_irqrestore(q->lock, flags); 272 return 1; 273 } else { 274 int fast = index & 0x01; 275 struct fib * fib = &dev->fibs[index >> 2]; 276 struct hw_fib * hwfib = fib->hw_fib_va; 277 278 /* 279 * Remove this fib from the Outstanding I/O queue. 280 * But only if it has not already been timed out. 281 * 282 * If the fib has been timed out already, then just 283 * continue. The caller has already been notified that 284 * the fib timed out. 285 */ 286 dev->queues->queue[AdapNormCmdQueue].numpending--; 287 288 if (unlikely(fib->flags & FIB_CONTEXT_FLAG_TIMED_OUT)) { 289 aac_fib_complete(fib); 290 aac_fib_free(fib); 291 return 0; 292 } 293 294 if (fast) { 295 /* 296 * Doctor the fib 297 */ 298 *(__le32 *)hwfib->data = cpu_to_le32(ST_OK); 299 hwfib->header.XferState |= cpu_to_le32(AdapterProcessed); 300 } 301 302 FIB_COUNTER_INCREMENT(aac_config.FibRecved); 303 304 if (hwfib->header.Command == cpu_to_le16(NuFileSystem)) 305 { 306 u32 *pstatus = (u32 *)hwfib->data; 307 if (*pstatus & cpu_to_le32(0xffff0000)) 308 *pstatus = cpu_to_le32(ST_OK); 309 } 310 if (hwfib->header.XferState & cpu_to_le32(NoResponseExpected | Async)) 311 { 312 if (hwfib->header.XferState & cpu_to_le32(NoResponseExpected)) 313 FIB_COUNTER_INCREMENT(aac_config.NoResponseRecved); 314 else 315 FIB_COUNTER_INCREMENT(aac_config.AsyncRecved); 316 /* 317 * NOTE: we cannot touch the fib after this 318 * call, because it may have been deallocated. 319 */ 320 fib->callback(fib->callback_data, fib); 321 } else { 322 unsigned long flagv; 323 dprintk((KERN_INFO "event_wait up\n")); 324 spin_lock_irqsave(&fib->event_lock, flagv); 325 if (!fib->done) 326 fib->done = 1; 327 up(&fib->event_wait); 328 spin_unlock_irqrestore(&fib->event_lock, flagv); 329 FIB_COUNTER_INCREMENT(aac_config.NormalRecved); 330 } 331 return 0; 332 } 333 } 334