drivers/scsi/aacraid/commctrl.c

   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  *  commctrl.c
  26  *
  27  * Abstract: Contains all routines for control of the AFA comm layer
  28  *
  29  */
  30
  31 #include <linux/kernel.h>
  32 #include <linux/init.h>
  33 #include <linux/types.h>
  34 #include <linux/sched.h>
  35 #include <linux/pci.h>
  36 #include <linux/spinlock.h>
  37 #include <linux/slab.h>
  38 #include <linux/completion.h>
  39 #include <linux/dma-mapping.h>
  40 #include <linux/blkdev.h>
  41 #include <linux/delay.h>
  42 #include <linux/kthread.h>
  43 #include <asm/semaphore.h>
  44 #include <asm/uaccess.h>
  45
  46 #include "aacraid.h"
  47
  48 /**
  49  *      ioctl_send_fib  -       send a FIB from userspace
  50  *      @dev:   adapter is being processed
  51  *      @arg:   arguments to the ioctl call
  52  *
  53  *      This routine sends a fib to the adapter on behalf of a user level
  54  *      program.
  55  */
  56 # define AAC_DEBUG_PREAMBLE     KERN_INFO
  57 # define AAC_DEBUG_POSTAMBLE
  58
  59 static int ioctl_send_fib(struct aac_dev * dev, void __user *arg)
  60 {
  61         struct hw_fib * kfib;
  62         struct fib *fibptr;
  63         struct hw_fib * hw_fib = (struct hw_fib *)0;
  64         dma_addr_t hw_fib_pa = (dma_addr_t)0LL;
  65         unsigned size;
  66         int retval;
  67
  68         fibptr = aac_fib_alloc(dev);
  69         if(fibptr == NULL) {
  70                 return -ENOMEM;
  71         }
  72
  73         kfib = fibptr->hw_fib;
  74         /*
  75          *      First copy in the header so that we can check the size field.
  76          */
  77         if (copy_from_user((void *)kfib, arg, sizeof(struct aac_fibhdr))) {
  78                 aac_fib_free(fibptr);
  79                 return -EFAULT;
  80         }
  81         /*
  82          *      Since we copy based on the fib header size, make sure that we
  83          *      will not overrun the buffer when we copy the memory. Return
  84          *      an error if we would.
  85          */
  86         size = le16_to_cpu(kfib->header.Size) + sizeof(struct aac_fibhdr);
  87         if (size < le16_to_cpu(kfib->header.SenderSize))
  88                 size = le16_to_cpu(kfib->header.SenderSize);
  89         if (size > dev->max_fib_size) {
  90                 if (size > 2048) {
  91                         retval = -EINVAL;
  92                         goto cleanup;
  93                 }
  94                 /* Highjack the hw_fib */
  95                 hw_fib = fibptr->hw_fib;
  96                 hw_fib_pa = fibptr->hw_fib_pa;
  97                 fibptr->hw_fib = kfib = pci_alloc_consistent(dev->pdev, size, &fibptr->hw_fib_pa);
  98                 memset(((char *)kfib) + dev->max_fib_size, 0, size - dev->max_fib_size);
  99                 memcpy(kfib, hw_fib, dev->max_fib_size);
 100         }
 101
 102         if (copy_from_user(kfib, arg, size)) {
 103                 retval = -EFAULT;
 104                 goto cleanup;
 105         }
 106
 107         if (kfib->header.Command == cpu_to_le16(TakeABreakPt)) {
 108                 aac_adapter_interrupt(dev);
 109                 /*
 110                  * Since we didn't really send a fib, zero out the state to allow
 111                  * cleanup code not to assert.
 112                  */
 113                 kfib->header.XferState = 0;
 114         } else {
 115                 retval = aac_fib_send(le16_to_cpu(kfib->header.Command), fibptr,
 116                                 le16_to_cpu(kfib->header.Size) , FsaNormal,
 117                                 1, 1, NULL, NULL);
 118                 if (retval) {
 119                         goto cleanup;
 120                 }
 121                 if (aac_fib_complete(fibptr) != 0) {
 122                         retval = -EINVAL;
 123                         goto cleanup;
 124                 }
 125         }
 126         /*
 127          *      Make sure that the size returned by the adapter (which includes
 128          *      the header) is less than or equal to the size of a fib, so we
 129          *      don't corrupt application data. Then copy that size to the user
 130          *      buffer. (Don't try to add the header information again, since it
 131          *      was already included by the adapter.)
 132          */
 133
 134         retval = 0;
 135         if (copy_to_user(arg, (void *)kfib, size))
 136                 retval = -EFAULT;
 137 cleanup:
 138         if (hw_fib) {
 139                 pci_free_consistent(dev->pdev, size, kfib, fibptr->hw_fib_pa);
 140                 fibptr->hw_fib_pa = hw_fib_pa;
 141                 fibptr->hw_fib = hw_fib;
 142         }
 143         aac_fib_free(fibptr);
 144         return retval;
 145 }
 146
 147 /**
 148  *      open_getadapter_fib     -       Get the next fib
 149  *
 150  *      This routine will get the next Fib, if available, from the AdapterFibContext
 151  *      passed in from the user.
 152  */
 153
 154 static int open_getadapter_fib(struct aac_dev * dev, void __user *arg)
 155 {
 156         struct aac_fib_context * fibctx;
 157         int status;
 158
 159         fibctx = kmalloc(sizeof(struct aac_fib_context), GFP_KERNEL);
 160         if (fibctx == NULL) {
 161                 status = -ENOMEM;
 162         } else {
 163                 unsigned long flags;
 164                 struct list_head * entry;
 165                 struct aac_fib_context * context;
 166
 167                 fibctx->type = FSAFS_NTC_GET_ADAPTER_FIB_CONTEXT;
 168                 fibctx->size = sizeof(struct aac_fib_context);
 169                 /*
 170                  *      Yes yes, I know this could be an index, but we have a
 171                  * better guarantee of uniqueness for the locked loop below.
 172                  * Without the aid of a persistent history, this also helps
 173                  * reduce the chance that the opaque context would be reused.
 174                  */
 175                 fibctx->unique = (u32)((ulong)fibctx & 0xFFFFFFFF);
 176                 /*
 177                  *      Initialize the mutex used to wait for the next AIF.
 178                  */
 179                 init_MUTEX_LOCKED(&fibctx->wait_sem);
 180                 fibctx->wait = 0;
 181                 /*
 182                  *      Initialize the fibs and set the count of fibs on
 183                  *      the list to 0.
 184                  */
 185                 fibctx->count = 0;
 186                 INIT_LIST_HEAD(&fibctx->fib_list);
 187                 fibctx->jiffies = jiffies/HZ;
 188                 /*
 189                  *      Now add this context onto the adapter's
 190                  *      AdapterFibContext list.
 191                  */
 192                 spin_lock_irqsave(&dev->fib_lock, flags);
 193                 /* Ensure that we have a unique identifier */
 194                 entry = dev->fib_list.next;
 195                 while (entry != &dev->fib_list) {
 196                         context = list_entry(entry, struct aac_fib_context, next);
 197                         if (context->unique == fibctx->unique) {
 198                                 /* Not unique (32 bits) */
 199                                 fibctx->unique++;
 200                                 entry = dev->fib_list.next;
 201                         } else {
 202                                 entry = entry->next;
 203                         }
 204                 }
 205                 list_add_tail(&fibctx->next, &dev->fib_list);
 206                 spin_unlock_irqrestore(&dev->fib_lock, flags);
 207                 if (copy_to_user(arg,  &fibctx->unique,
 208                                                 sizeof(fibctx->unique))) {
 209                         status = -EFAULT;
 210                 } else {
 211                         status = 0;
 212                 }
 213         }
 214         return status;
 215 }
 216
 217 /**
 218  *      next_getadapter_fib     -       get the next fib
 219  *      @dev: adapter to use
 220  *      @arg: ioctl argument
 221  *
 222  *      This routine will get the next Fib, if available, from the AdapterFibContext
 223  *      passed in from the user.
 224  */
 225
 226 static int next_getadapter_fib(struct aac_dev * dev, void __user *arg)
 227 {
 228         struct fib_ioctl f;
 229         struct fib *fib;
 230         struct aac_fib_context *fibctx;
 231         int status;
 232         struct list_head * entry;
 233         unsigned long flags;
 234
 235         if(copy_from_user((void *)&f, arg, sizeof(struct fib_ioctl)))
 236                 return -EFAULT;
 237         /*
 238          *      Verify that the HANDLE passed in was a valid AdapterFibContext
 239          *
 240          *      Search the list of AdapterFibContext addresses on the adapter
 241          *      to be sure this is a valid address
 242          */
 243         entry = dev->fib_list.next;
 244         fibctx = NULL;
 245
 246         while (entry != &dev->fib_list) {
 247                 fibctx = list_entry(entry, struct aac_fib_context, next);
 248                 /*
 249                  *      Extract the AdapterFibContext from the Input parameters.
 250                  */
 251                 if (fibctx->unique == f.fibctx) {   /* We found a winner */
 252                         break;
 253                 }
 254                 entry = entry->next;
 255                 fibctx = NULL;
 256         }
 257         if (!fibctx) {
 258                 dprintk ((KERN_INFO "Fib Context not found\n"));
 259                 return -EINVAL;
 260         }
 261
 262         if((fibctx->type != FSAFS_NTC_GET_ADAPTER_FIB_CONTEXT) ||
 263                  (fibctx->size != sizeof(struct aac_fib_context))) {
 264                 dprintk ((KERN_INFO "Fib Context corrupt?\n"));
 265                 return -EINVAL;
 266         }
 267         status = 0;
 268         spin_lock_irqsave(&dev->fib_lock, flags);
 269         /*
 270          *      If there are no fibs to send back, then either wait or return
 271          *      -EAGAIN
 272          */
 273 return_fib:
 274         if (!list_empty(&fibctx->fib_list)) {
 275                 struct list_head * entry;
 276                 /*
 277                  *      Pull the next fib from the fibs
 278                  */
 279                 entry = fibctx->fib_list.next;
 280                 list_del(entry);
 281
 282                 fib = list_entry(entry, struct fib, fiblink);
 283                 fibctx->count--;
 284                 spin_unlock_irqrestore(&dev->fib_lock, flags);
 285                 if (copy_to_user(f.fib, fib->hw_fib, sizeof(struct hw_fib))) {
 286                         kfree(fib->hw_fib);
 287                         kfree(fib);
 288                         return -EFAULT;
 289                 }
 290                 /*
 291                  *      Free the space occupied by this copy of the fib.
 292                  */
 293                 kfree(fib->hw_fib);
 294                 kfree(fib);
 295                 status = 0;
 296         } else {
 297                 spin_unlock_irqrestore(&dev->fib_lock, flags);
 298                 /* If someone killed the AIF aacraid thread, restart it */
 299                 status = !dev->aif_thread;
 300                 if (status && dev->queues && dev->fsa_dev) {
 301                         /* Be paranoid, be very paranoid! */
 302                         kthread_stop(dev->thread);
 303                         ssleep(1);
 304                         dev->aif_thread = 0;
 305                         dev->thread = kthread_run(aac_command_thread, dev, dev->name);
 306                         ssleep(1);
 307                 }
 308                 if (f.wait) {
 309                         if(down_interruptible(&fibctx->wait_sem) < 0) {
 310                                 status = -EINTR;
 311                         } else {
 312                                 /* Lock again and retry */
 313                                 spin_lock_irqsave(&dev->fib_lock, flags);
 314                                 goto return_fib;
 315                         }
 316                 } else {
 317                         status = -EAGAIN;
 318                 }
 319         }
 320         fibctx->jiffies = jiffies/HZ;
 321         return status;
 322 }
 323
 324 int aac_close_fib_context(struct aac_dev * dev, struct aac_fib_context * fibctx)
 325 {
 326         struct fib *fib;
 327
 328         /*
 329          *      First free any FIBs that have not been consumed.
 330          */
 331         while (!list_empty(&fibctx->fib_list)) {
 332                 struct list_head * entry;
 333                 /*
 334                  *      Pull the next fib from the fibs
 335                  */
 336                 entry = fibctx->fib_list.next;
 337                 list_del(entry);
 338                 fib = list_entry(entry, struct fib, fiblink);
 339                 fibctx->count--;
 340                 /*
 341                  *      Free the space occupied by this copy of the fib.
 342                  */
 343                 kfree(fib->hw_fib);
 344                 kfree(fib);
 345         }
 346         /*
 347          *      Remove the Context from the AdapterFibContext List
 348          */
 349         list_del(&fibctx->next);
 350         /*
 351          *      Invalidate context
 352          */
 353         fibctx->type = 0;
 354         /*
 355          *      Free the space occupied by the Context
 356          */
 357         kfree(fibctx);
 358         return 0;
 359 }
 360
 361 /**
 362  *      close_getadapter_fib    -       close down user fib context
 363  *      @dev: adapter
 364  *      @arg: ioctl arguments
 365  *
 366  *      This routine will close down the fibctx passed in from the user.
 367  */
 368
 369 static int close_getadapter_fib(struct aac_dev * dev, void __user *arg)
 370 {
 371         struct aac_fib_context *fibctx;
 372         int status;
 373         unsigned long flags;
 374         struct list_head * entry;
 375
 376         /*
 377          *      Verify that the HANDLE passed in was a valid AdapterFibContext
 378          *
 379          *      Search the list of AdapterFibContext addresses on the adapter
 380          *      to be sure this is a valid address
 381          */
 382
 383         entry = dev->fib_list.next;
 384         fibctx = NULL;
 385
 386         while(entry != &dev->fib_list) {
 387                 fibctx = list_entry(entry, struct aac_fib_context, next);
 388                 /*
 389                  *      Extract the fibctx from the input parameters
 390                  */
 391                 if (fibctx->unique == (u32)(unsigned long)arg) {
 392                         /* We found a winner */
 393                         break;
 394                 }
 395                 entry = entry->next;
 396                 fibctx = NULL;
 397         }
 398
 399         if (!fibctx)
 400                 return 0; /* Already gone */
 401
 402         if((fibctx->type != FSAFS_NTC_GET_ADAPTER_FIB_CONTEXT) ||
 403                  (fibctx->size != sizeof(struct aac_fib_context)))
 404                 return -EINVAL;
 405         spin_lock_irqsave(&dev->fib_lock, flags);
 406         status = aac_close_fib_context(dev, fibctx);
 407         spin_unlock_irqrestore(&dev->fib_lock, flags);
 408         return status;
 409 }
 410
 411 /**
 412  *      check_revision  -       close down user fib context
 413  *      @dev: adapter
 414  *      @arg: ioctl arguments
 415  *
 416  *      This routine returns the driver version.
 417  *      Under Linux, there have been no version incompatibilities, so this is
 418  *      simple!
 419  */
 420
 421 static int check_revision(struct aac_dev *dev, void __user *arg)
 422 {
 423         struct revision response;
 424         char *driver_version = aac_driver_version;
 425         u32 version;
 426
 427         response.compat = 1;
 428         version = (simple_strtol(driver_version,
 429                                 &driver_version, 10) << 24) | 0x00000400;
 430         version += simple_strtol(driver_version + 1, &driver_version, 10) << 16;
 431         version += simple_strtol(driver_version + 1, NULL, 10);
 432         response.version = cpu_to_le32(version);
 433 #       if (defined(AAC_DRIVER_BUILD))
 434                 response.build = cpu_to_le32(AAC_DRIVER_BUILD);
 435 #       else
 436                 response.build = cpu_to_le32(9999);
 437 #       endif
 438
 439         if (copy_to_user(arg, &response, sizeof(response)))
 440                 return -EFAULT;
 441         return 0;
 442 }
 443
 444
 445 /**
 446  *
 447  * aac_send_raw_scb
 448  *
 449  */
 450
 451 static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 452 {
 453         struct fib* srbfib;
 454         int status;
 455         struct aac_srb *srbcmd = NULL;
 456         struct user_aac_srb *user_srbcmd = NULL;
 457         struct user_aac_srb __user *user_srb = arg;
 458         struct aac_srb_reply __user *user_reply;
 459         struct aac_srb_reply* reply;
 460         u32 fibsize = 0;
 461         u32 flags = 0;
 462         s32 rcode = 0;
 463         u32 data_dir;
 464         void __user *sg_user[32];
 465         void *sg_list[32];
 466         u32   sg_indx = 0;
 467         u32 byte_count = 0;
 468         u32 actual_fibsize = 0;
 469         int i;
 470
 471
 472         if (!capable(CAP_SYS_ADMIN)){
 473                 dprintk((KERN_DEBUG"aacraid: No permission to send raw srb\n"));
 474                 return -EPERM;
 475         }
 476         /*
 477          *      Allocate and initialize a Fib then setup a BlockWrite command
 478          */
 479         if (!(srbfib = aac_fib_alloc(dev))) {
 480                 return -ENOMEM;
 481         }
 482         aac_fib_init(srbfib);
 483
 484         srbcmd = (struct aac_srb*) fib_data(srbfib);
 485
 486         memset(sg_list, 0, sizeof(sg_list)); /* cleanup may take issue */
 487         if(copy_from_user(&fibsize, &user_srb->count,sizeof(u32))){
 488                 dprintk((KERN_DEBUG"aacraid: Could not copy data size from user\n"));
 489                 rcode = -EFAULT;
 490                 goto cleanup;
 491         }
 492
 493         if (fibsize > (dev->max_fib_size - sizeof(struct aac_fibhdr))) {
 494                 rcode = -EINVAL;
 495                 goto cleanup;
 496         }
 497
 498         user_srbcmd = kmalloc(fibsize, GFP_KERNEL);
 499         if (!user_srbcmd) {
 500                 dprintk((KERN_DEBUG"aacraid: Could not make a copy of the srb\n"));
 501                 rcode = -ENOMEM;
 502                 goto cleanup;
 503         }
 504         if(copy_from_user(user_srbcmd, user_srb,fibsize)){
 505                 dprintk((KERN_DEBUG"aacraid: Could not copy srb from user\n"));
 506                 rcode = -EFAULT;
 507                 goto cleanup;
 508         }
 509
 510         user_reply = arg+fibsize;
 511
 512         flags = user_srbcmd->flags; /* from user in cpu order */
 513         // Fix up srb for endian and force some values
 514
 515         srbcmd->function = cpu_to_le32(SRBF_ExecuteScsi);       // Force this
 516         srbcmd->channel  = cpu_to_le32(user_srbcmd->channel);
 517         srbcmd->id       = cpu_to_le32(user_srbcmd->id);
 518         srbcmd->lun      = cpu_to_le32(user_srbcmd->lun);
 519         srbcmd->timeout  = cpu_to_le32(user_srbcmd->timeout);
 520         srbcmd->flags    = cpu_to_le32(flags);
 521         srbcmd->retry_limit = 0; // Obsolete parameter
 522         srbcmd->cdb_size = cpu_to_le32(user_srbcmd->cdb_size);
 523         memcpy(srbcmd->cdb, user_srbcmd->cdb, sizeof(srbcmd->cdb));
 524
 525         switch (flags & (SRB_DataIn | SRB_DataOut)) {
 526         case SRB_DataOut:
 527                 data_dir = DMA_TO_DEVICE;
 528                 break;
 529         case (SRB_DataIn | SRB_DataOut):
 530                 data_dir = DMA_BIDIRECTIONAL;
 531                 break;
 532         case SRB_DataIn:
 533                 data_dir = DMA_FROM_DEVICE;
 534                 break;
 535         default:
 536                 data_dir = DMA_NONE;
 537         }
 538         if (user_srbcmd->sg.count > (sizeof(sg_list)/sizeof(sg_list[0]))) {
 539                 dprintk((KERN_DEBUG"aacraid: too many sg entries %d\n",
 540                   le32_to_cpu(srbcmd->sg.count)));
 541                 rcode = -EINVAL;
 542                 goto cleanup;
 543         }
 544         if (dev->dac_support == 1) {
 545                 struct user_sgmap64* upsg = (struct user_sgmap64*)&user_srbcmd->sg;
 546                 struct sgmap64* psg = (struct sgmap64*)&srbcmd->sg;
 547                 struct user_sgmap* usg;
 548                 byte_count = 0;
 549
 550                 /*
 551                  * This should also catch if user used the 32 bit sgmap
 552                  */
 553                 actual_fibsize = sizeof(struct aac_srb) -
 554                         sizeof(struct sgentry) +
 555                         ((upsg->count & 0xff) *
 556                         sizeof(struct sgentry));
 557                 if(actual_fibsize != fibsize){ // User made a mistake - should not continue
 558                         dprintk((KERN_DEBUG"aacraid: Bad Size specified in Raw SRB command\n"));
 559                         rcode = -EINVAL;
 560                         goto cleanup;
 561                 }
 562                 usg = kmalloc(actual_fibsize - sizeof(struct aac_srb)
 563                   + sizeof(struct sgmap), GFP_KERNEL);
 564                 if (!usg) {
 565                         dprintk((KERN_DEBUG"aacraid: Allocation error in Raw SRB command\n"));
 566                         rcode = -ENOMEM;
 567                         goto cleanup;
 568                 }
 569                 memcpy (usg, upsg, actual_fibsize - sizeof(struct aac_srb)
 570                   + sizeof(struct sgmap));
 571                 actual_fibsize = sizeof(struct aac_srb) -
 572                         sizeof(struct sgentry) + ((usg->count & 0xff) *
 573                                 sizeof(struct sgentry64));
 574                 if ((data_dir == DMA_NONE) && upsg->count) {
 575                         kfree (usg);
 576                         dprintk((KERN_DEBUG"aacraid: SG with no direction specified in Raw SRB command\n"));
 577                         rcode = -EINVAL;
 578                         goto cleanup;
 579                 }
 580
 581                 for (i = 0; i < usg->count; i++) {
 582                         u64 addr;
 583                         void* p;
 584                         /* Does this really need to be GFP_DMA? */
 585                         p = kmalloc(usg->sg[i].count,GFP_KERNEL|__GFP_DMA);
 586                         if(p == 0) {
 587                                 kfree (usg);
 588                                 dprintk((KERN_DEBUG"aacraid: Could not allocate SG buffer - size = %d buffer number %d of %d\n",
 589                                   usg->sg[i].count,i,usg->count));
 590                                 rcode = -ENOMEM;
 591                                 goto cleanup;
 592                         }
 593                         sg_user[i] = (void __user *)(long)usg->sg[i].addr;
 594                         sg_list[i] = p; // save so we can clean up later
 595                         sg_indx = i;
 596
 597                         if( flags & SRB_DataOut ){
 598                                 if(copy_from_user(p,sg_user[i],upsg->sg[i].count)){
 599                                         kfree (usg);
 600                                         dprintk((KERN_DEBUG"aacraid: Could not copy sg data from user\n"));
 601                                         rcode = -EFAULT;
 602                                         goto cleanup;
 603                                 }
 604                         }
 605                         addr = pci_map_single(dev->pdev, p, usg->sg[i].count, data_dir);
 606
 607                         psg->sg[i].addr[0] = cpu_to_le32(addr & 0xffffffff);
 608                         psg->sg[i].addr[1] = cpu_to_le32(addr>>32);
 609                         psg->sg[i].count = cpu_to_le32(usg->sg[i].count);
 610                         byte_count += usg->sg[i].count;
 611                 }
 612                 kfree (usg);
 613
 614                 srbcmd->count = cpu_to_le32(byte_count);
 615                 psg->count = cpu_to_le32(sg_indx+1);
 616                 status = aac_fib_send(ScsiPortCommand64, srbfib, actual_fibsize, FsaNormal, 1, 1,NULL,NULL);
 617         } else {
 618                 struct user_sgmap* upsg = &user_srbcmd->sg;
 619                 struct sgmap* psg = &srbcmd->sg;
 620                 byte_count = 0;
 621
 622                 actual_fibsize = sizeof (struct aac_srb) + (((user_srbcmd->sg.count & 0xff) - 1) * sizeof (struct sgentry));
 623                 if(actual_fibsize != fibsize){ // User made a mistake - should not continue
 624                         dprintk((KERN_DEBUG"aacraid: Bad Size specified in Raw SRB command\n"));
 625                         rcode = -EINVAL;
 626                         goto cleanup;
 627                 }
 628                 if ((data_dir == DMA_NONE) && upsg->count) {
 629                         dprintk((KERN_DEBUG"aacraid: SG with no direction specified in Raw SRB command\n"));
 630                         rcode = -EINVAL;
 631                         goto cleanup;
 632                 }
 633                 for (i = 0; i < upsg->count; i++) {
 634                         dma_addr_t addr;
 635                         void* p;
 636                         p = kmalloc(upsg->sg[i].count, GFP_KERNEL);
 637                         if(p == 0) {
 638                                 dprintk((KERN_DEBUG"aacraid: Could not allocate SG buffer - size = %d buffer number %d of %d\n",
 639                                   upsg->sg[i].count, i, upsg->count));
 640                                 rcode = -ENOMEM;
 641                                 goto cleanup;
 642                         }
 643                         sg_user[i] = (void __user *)(long)upsg->sg[i].addr;
 644                         sg_list[i] = p; // save so we can clean up later
 645                         sg_indx = i;
 646
 647                         if( flags & SRB_DataOut ){
 648                                 if(copy_from_user(p, sg_user[i],
 649                                                 upsg->sg[i].count)) {
 650                                         dprintk((KERN_DEBUG"aacraid: Could not copy sg data from user\n"));
 651                                         rcode = -EFAULT;
 652                                         goto cleanup;
 653                                 }
 654                         }
 655                         addr = pci_map_single(dev->pdev, p,
 656                                 upsg->sg[i].count, data_dir);
 657
 658                         psg->sg[i].addr = cpu_to_le32(addr);
 659                         psg->sg[i].count = cpu_to_le32(upsg->sg[i].count);
 660                         byte_count += upsg->sg[i].count;
 661                 }
 662                 srbcmd->count = cpu_to_le32(byte_count);
 663                 psg->count = cpu_to_le32(sg_indx+1);
 664                 status = aac_fib_send(ScsiPortCommand, srbfib, actual_fibsize, FsaNormal, 1, 1, NULL, NULL);
 665         }
 666
 667         if (status != 0){
 668                 dprintk((KERN_DEBUG"aacraid: Could not send raw srb fib to hba\n"));
 669                 rcode = -ENXIO;
 670                 goto cleanup;
 671         }
 672
 673         if( flags & SRB_DataIn ) {
 674                 for(i = 0 ; i <= sg_indx; i++){
 675                         byte_count = le32_to_cpu((dev->dac_support == 1)
 676                               ? ((struct sgmap64*)&srbcmd->sg)->sg[i].count
 677                               : srbcmd->sg.sg[i].count);
 678                         if(copy_to_user(sg_user[i], sg_list[i], byte_count)){
 679                                 dprintk((KERN_DEBUG"aacraid: Could not copy sg data to user\n"));
 680                                 rcode = -EFAULT;
 681                                 goto cleanup;
 682
 683                         }
 684                 }
 685         }
 686
 687         reply = (struct aac_srb_reply *) fib_data(srbfib);
 688         if(copy_to_user(user_reply,reply,sizeof(struct aac_srb_reply))){
 689                 dprintk((KERN_DEBUG"aacraid: Could not copy reply to user\n"));
 690                 rcode = -EFAULT;
 691                 goto cleanup;
 692         }
 693
 694 cleanup:
 695         kfree(user_srbcmd);
 696         for(i=0; i <= sg_indx; i++){
 697                 kfree(sg_list[i]);
 698         }
 699         aac_fib_complete(srbfib);
 700         aac_fib_free(srbfib);
 701
 702         return rcode;
 703 }
 704
 705 struct aac_pci_info {
 706         u32 bus;
 707         u32 slot;
 708 };
 709
 710
 711 static int aac_get_pci_info(struct aac_dev* dev, void __user *arg)
 712 {
 713         struct aac_pci_info pci_info;
 714
 715         pci_info.bus = dev->pdev->bus->number;
 716         pci_info.slot = PCI_SLOT(dev->pdev->devfn);
 717
 718        if (copy_to_user(arg, &pci_info, sizeof(struct aac_pci_info))) {
 719                dprintk((KERN_DEBUG "aacraid: Could not copy pci info\n"));
 720                return -EFAULT;
 721         }
 722         return 0;
 723 }
 724
 725
 726 int aac_do_ioctl(struct aac_dev * dev, int cmd, void __user *arg)
 727 {
 728         int status;
 729
 730         /*
 731          *      HBA gets first crack
 732          */
 733
 734         status = aac_dev_ioctl(dev, cmd, arg);
 735         if(status != -ENOTTY)
 736                 return status;
 737
 738         switch (cmd) {
 739         case FSACTL_MINIPORT_REV_CHECK:
 740                 status = check_revision(dev, arg);
 741                 break;
 742         case FSACTL_SEND_LARGE_FIB:
 743         case FSACTL_SENDFIB:
 744                 status = ioctl_send_fib(dev, arg);
 745                 break;
 746         case FSACTL_OPEN_GET_ADAPTER_FIB:
 747                 status = open_getadapter_fib(dev, arg);
 748                 break;
 749         case FSACTL_GET_NEXT_ADAPTER_FIB:
 750                 status = next_getadapter_fib(dev, arg);
 751                 break;
 752         case FSACTL_CLOSE_GET_ADAPTER_FIB:
 753                 status = close_getadapter_fib(dev, arg);
 754                 break;
 755         case FSACTL_SEND_RAW_SRB:
 756                 status = aac_send_raw_srb(dev,arg);
 757                 break;
 758         case FSACTL_GET_PCI_INFO:
 759                 status = aac_get_pci_info(dev,arg);
 760                 break;
 761         default:
 762                 status = -ENOTTY;
 763                 break;
 764         }
 765         return status;
 766 }
 767