[SCSI] Revert "[SCSI] aacraid: fib context lock for management ioctls"
[linux-2.6] / 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) 2000-2007 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  *  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/pci.h>
35 #include <linux/spinlock.h>
36 #include <linux/slab.h>
37 #include <linux/completion.h>
38 #include <linux/dma-mapping.h>
39 #include <linux/blkdev.h>
40 #include <linux/delay.h> /* ssleep prototype */
41 #include <linux/kthread.h>
42 #include <asm/semaphore.h>
43 #include <asm/uaccess.h>
44
45 #include "aacraid.h"
46
47 /**
48  *      ioctl_send_fib  -       send a FIB from userspace
49  *      @dev:   adapter is being processed
50  *      @arg:   arguments to the ioctl call
51  *
52  *      This routine sends a fib to the adapter on behalf of a user level
53  *      program.
54  */
55 # define AAC_DEBUG_PREAMBLE     KERN_INFO
56 # define AAC_DEBUG_POSTAMBLE
57
58 static int ioctl_send_fib(struct aac_dev * dev, void __user *arg)
59 {
60         struct hw_fib * kfib;
61         struct fib *fibptr;
62         struct hw_fib * hw_fib = (struct hw_fib *)0;
63         dma_addr_t hw_fib_pa = (dma_addr_t)0LL;
64         unsigned size;
65         int retval;
66
67         if (dev->in_reset) {
68                 return -EBUSY;
69         }
70         fibptr = aac_fib_alloc(dev);
71         if(fibptr == NULL) {
72                 return -ENOMEM;
73         }
74
75         kfib = fibptr->hw_fib_va;
76         /*
77          *      First copy in the header so that we can check the size field.
78          */
79         if (copy_from_user((void *)kfib, arg, sizeof(struct aac_fibhdr))) {
80                 aac_fib_free(fibptr);
81                 return -EFAULT;
82         }
83         /*
84          *      Since we copy based on the fib header size, make sure that we
85          *      will not overrun the buffer when we copy the memory. Return
86          *      an error if we would.
87          */
88         size = le16_to_cpu(kfib->header.Size) + sizeof(struct aac_fibhdr);
89         if (size < le16_to_cpu(kfib->header.SenderSize))
90                 size = le16_to_cpu(kfib->header.SenderSize);
91         if (size > dev->max_fib_size) {
92                 if (size > 2048) {
93                         retval = -EINVAL;
94                         goto cleanup;
95                 }
96                 /* Highjack the hw_fib */
97                 hw_fib = fibptr->hw_fib_va;
98                 hw_fib_pa = fibptr->hw_fib_pa;
99                 fibptr->hw_fib_va = kfib = pci_alloc_consistent(dev->pdev, size, &fibptr->hw_fib_pa);
100                 memset(((char *)kfib) + dev->max_fib_size, 0, size - dev->max_fib_size);
101                 memcpy(kfib, hw_fib, dev->max_fib_size);
102         }
103
104         if (copy_from_user(kfib, arg, size)) {
105                 retval = -EFAULT;
106                 goto cleanup;
107         }
108
109         if (kfib->header.Command == cpu_to_le16(TakeABreakPt)) {
110                 aac_adapter_interrupt(dev);
111                 /*
112                  * Since we didn't really send a fib, zero out the state to allow
113                  * cleanup code not to assert.
114                  */
115                 kfib->header.XferState = 0;
116         } else {
117                 retval = aac_fib_send(le16_to_cpu(kfib->header.Command), fibptr,
118                                 le16_to_cpu(kfib->header.Size) , FsaNormal,
119                                 1, 1, NULL, NULL);
120                 if (retval) {
121                         goto cleanup;
122                 }
123                 if (aac_fib_complete(fibptr) != 0) {
124                         retval = -EINVAL;
125                         goto cleanup;
126                 }
127         }
128         /*
129          *      Make sure that the size returned by the adapter (which includes
130          *      the header) is less than or equal to the size of a fib, so we
131          *      don't corrupt application data. Then copy that size to the user
132          *      buffer. (Don't try to add the header information again, since it
133          *      was already included by the adapter.)
134          */
135
136         retval = 0;
137         if (copy_to_user(arg, (void *)kfib, size))
138                 retval = -EFAULT;
139 cleanup:
140         if (hw_fib) {
141                 pci_free_consistent(dev->pdev, size, kfib, fibptr->hw_fib_pa);
142                 fibptr->hw_fib_pa = hw_fib_pa;
143                 fibptr->hw_fib_va = hw_fib;
144         }
145         if (retval != -EINTR)
146                 aac_fib_free(fibptr);
147         return retval;
148 }
149
150 /**
151  *      open_getadapter_fib     -       Get the next fib
152  *
153  *      This routine will get the next Fib, if available, from the AdapterFibContext
154  *      passed in from the user.
155  */
156
157 static int open_getadapter_fib(struct aac_dev * dev, void __user *arg)
158 {
159         struct aac_fib_context * fibctx;
160         int status;
161
162         fibctx = kmalloc(sizeof(struct aac_fib_context), GFP_KERNEL);
163         if (fibctx == NULL) {
164                 status = -ENOMEM;
165         } else {
166                 unsigned long flags;
167                 struct list_head * entry;
168                 struct aac_fib_context * context;
169
170                 fibctx->type = FSAFS_NTC_GET_ADAPTER_FIB_CONTEXT;
171                 fibctx->size = sizeof(struct aac_fib_context);
172                 /*
173                  *      Yes yes, I know this could be an index, but we have a
174                  * better guarantee of uniqueness for the locked loop below.
175                  * Without the aid of a persistent history, this also helps
176                  * reduce the chance that the opaque context would be reused.
177                  */
178                 fibctx->unique = (u32)((ulong)fibctx & 0xFFFFFFFF);
179                 /*
180                  *      Initialize the mutex used to wait for the next AIF.
181                  */
182                 init_MUTEX_LOCKED(&fibctx->wait_sem);
183                 fibctx->wait = 0;
184                 /*
185                  *      Initialize the fibs and set the count of fibs on
186                  *      the list to 0.
187                  */
188                 fibctx->count = 0;
189                 INIT_LIST_HEAD(&fibctx->fib_list);
190                 fibctx->jiffies = jiffies/HZ;
191                 /*
192                  *      Now add this context onto the adapter's
193                  *      AdapterFibContext list.
194                  */
195                 spin_lock_irqsave(&dev->fib_lock, flags);
196                 /* Ensure that we have a unique identifier */
197                 entry = dev->fib_list.next;
198                 while (entry != &dev->fib_list) {
199                         context = list_entry(entry, struct aac_fib_context, next);
200                         if (context->unique == fibctx->unique) {
201                                 /* Not unique (32 bits) */
202                                 fibctx->unique++;
203                                 entry = dev->fib_list.next;
204                         } else {
205                                 entry = entry->next;
206                         }
207                 }
208                 list_add_tail(&fibctx->next, &dev->fib_list);
209                 spin_unlock_irqrestore(&dev->fib_lock, flags);
210                 if (copy_to_user(arg, &fibctx->unique,
211                                                 sizeof(fibctx->unique))) {
212                         status = -EFAULT;
213                 } else {
214                         status = 0;
215                 }
216         }
217         return status;
218 }
219
220 /**
221  *      next_getadapter_fib     -       get the next fib
222  *      @dev: adapter to use
223  *      @arg: ioctl argument
224  *
225  *      This routine will get the next Fib, if available, from the AdapterFibContext
226  *      passed in from the user.
227  */
228
229 static int next_getadapter_fib(struct aac_dev * dev, void __user *arg)
230 {
231         struct fib_ioctl f;
232         struct fib *fib;
233         struct aac_fib_context *fibctx;
234         int status;
235         struct list_head * entry;
236         unsigned long flags;
237
238         if(copy_from_user((void *)&f, arg, sizeof(struct fib_ioctl)))
239                 return -EFAULT;
240         /*
241          *      Verify that the HANDLE passed in was a valid AdapterFibContext
242          *
243          *      Search the list of AdapterFibContext addresses on the adapter
244          *      to be sure this is a valid address
245          */
246         entry = dev->fib_list.next;
247         fibctx = NULL;
248
249         while (entry != &dev->fib_list) {
250                 fibctx = list_entry(entry, struct aac_fib_context, next);
251                 /*
252                  *      Extract the AdapterFibContext from the Input parameters.
253                  */
254                 if (fibctx->unique == f.fibctx) {   /* We found a winner */
255                         break;
256                 }
257                 entry = entry->next;
258                 fibctx = NULL;
259         }
260         if (!fibctx) {
261                 dprintk ((KERN_INFO "Fib Context not found\n"));
262                 return -EINVAL;
263         }
264
265         if((fibctx->type != FSAFS_NTC_GET_ADAPTER_FIB_CONTEXT) ||
266                  (fibctx->size != sizeof(struct aac_fib_context))) {
267                 dprintk ((KERN_INFO "Fib Context corrupt?\n"));
268                 return -EINVAL;
269         }
270         status = 0;
271         spin_lock_irqsave(&dev->fib_lock, flags);
272         /*
273          *      If there are no fibs to send back, then either wait or return
274          *      -EAGAIN
275          */
276 return_fib:
277         if (!list_empty(&fibctx->fib_list)) {
278                 /*
279                  *      Pull the next fib from the fibs
280                  */
281                 entry = fibctx->fib_list.next;
282                 list_del(entry);
283
284                 fib = list_entry(entry, struct fib, fiblink);
285                 fibctx->count--;
286                 spin_unlock_irqrestore(&dev->fib_lock, flags);
287                 if (copy_to_user(f.fib, fib->hw_fib_va, sizeof(struct hw_fib))) {
288                         kfree(fib->hw_fib_va);
289                         kfree(fib);
290                         return -EFAULT;
291                 }
292                 /*
293                  *      Free the space occupied by this copy of the fib.
294                  */
295                 kfree(fib->hw_fib_va);
296                 kfree(fib);
297                 status = 0;
298         } else {
299                 spin_unlock_irqrestore(&dev->fib_lock, flags);
300                 /* If someone killed the AIF aacraid thread, restart it */
301                 status = !dev->aif_thread;
302                 if (status && !dev->in_reset && dev->queues && dev->fsa_dev) {
303                         /* Be paranoid, be very paranoid! */
304                         kthread_stop(dev->thread);
305                         ssleep(1);
306                         dev->aif_thread = 0;
307                         dev->thread = kthread_run(aac_command_thread, dev, dev->name);
308                         ssleep(1);
309                 }
310                 if (f.wait) {
311                         if(down_interruptible(&fibctx->wait_sem) < 0) {
312                                 status = -EINTR;
313                         } else {
314                                 /* Lock again and retry */
315                                 spin_lock_irqsave(&dev->fib_lock, flags);
316                                 goto return_fib;
317                         }
318                 } else {
319                         status = -EAGAIN;
320                 }
321         }
322         fibctx->jiffies = jiffies/HZ;
323         return status;
324 }
325
326 int aac_close_fib_context(struct aac_dev * dev, struct aac_fib_context * fibctx)
327 {
328         struct fib *fib;
329
330         /*
331          *      First free any FIBs that have not been consumed.
332          */
333         while (!list_empty(&fibctx->fib_list)) {
334                 struct list_head * entry;
335                 /*
336                  *      Pull the next fib from the fibs
337                  */
338                 entry = fibctx->fib_list.next;
339                 list_del(entry);
340                 fib = list_entry(entry, struct fib, fiblink);
341                 fibctx->count--;
342                 /*
343                  *      Free the space occupied by this copy of the fib.
344                  */
345                 kfree(fib->hw_fib_va);
346                 kfree(fib);
347         }
348         /*
349          *      Remove the Context from the AdapterFibContext List
350          */
351         list_del(&fibctx->next);
352         /*
353          *      Invalidate context
354          */
355         fibctx->type = 0;
356         /*
357          *      Free the space occupied by the Context
358          */
359         kfree(fibctx);
360         return 0;
361 }
362
363 /**
364  *      close_getadapter_fib    -       close down user fib context
365  *      @dev: adapter
366  *      @arg: ioctl arguments
367  *
368  *      This routine will close down the fibctx passed in from the user.
369  */
370
371 static int close_getadapter_fib(struct aac_dev * dev, void __user *arg)
372 {
373         struct aac_fib_context *fibctx;
374         int status;
375         unsigned long flags;
376         struct list_head * entry;
377
378         /*
379          *      Verify that the HANDLE passed in was a valid AdapterFibContext
380          *
381          *      Search the list of AdapterFibContext addresses on the adapter
382          *      to be sure this is a valid address
383          */
384
385         entry = dev->fib_list.next;
386         fibctx = NULL;
387
388         while(entry != &dev->fib_list) {
389                 fibctx = list_entry(entry, struct aac_fib_context, next);
390                 /*
391                  *      Extract the fibctx from the input parameters
392                  */
393                 if (fibctx->unique == (u32)(uintptr_t)arg) /* We found a winner */
394                         break;
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 #       ifdef 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_fibsize64, actual_fibsize = 0;
469         int i;
470
471
472         if (dev->in_reset) {
473                 dprintk((KERN_DEBUG"aacraid: send raw srb -EBUSY\n"));
474                 return -EBUSY;
475         }
476         if (!capable(CAP_SYS_ADMIN)){
477                 dprintk((KERN_DEBUG"aacraid: No permission to send raw srb\n"));
478                 return -EPERM;
479         }
480         /*
481          *      Allocate and initialize a Fib then setup a SRB command
482          */
483         if (!(srbfib = aac_fib_alloc(dev))) {
484                 return -ENOMEM;
485         }
486         aac_fib_init(srbfib);
487
488         srbcmd = (struct aac_srb*) fib_data(srbfib);
489
490         memset(sg_list, 0, sizeof(sg_list)); /* cleanup may take issue */
491         if(copy_from_user(&fibsize, &user_srb->count,sizeof(u32))){
492                 dprintk((KERN_DEBUG"aacraid: Could not copy data size from user\n"));
493                 rcode = -EFAULT;
494                 goto cleanup;
495         }
496
497         if (fibsize > (dev->max_fib_size - sizeof(struct aac_fibhdr))) {
498                 rcode = -EINVAL;
499                 goto cleanup;
500         }
501
502         user_srbcmd = kmalloc(fibsize, GFP_KERNEL);
503         if (!user_srbcmd) {
504                 dprintk((KERN_DEBUG"aacraid: Could not make a copy of the srb\n"));
505                 rcode = -ENOMEM;
506                 goto cleanup;
507         }
508         if(copy_from_user(user_srbcmd, user_srb,fibsize)){
509                 dprintk((KERN_DEBUG"aacraid: Could not copy srb from user\n"));
510                 rcode = -EFAULT;
511                 goto cleanup;
512         }
513
514         user_reply = arg+fibsize;
515
516         flags = user_srbcmd->flags; /* from user in cpu order */
517         // Fix up srb for endian and force some values
518
519         srbcmd->function = cpu_to_le32(SRBF_ExecuteScsi);       // Force this
520         srbcmd->channel  = cpu_to_le32(user_srbcmd->channel);
521         srbcmd->id       = cpu_to_le32(user_srbcmd->id);
522         srbcmd->lun      = cpu_to_le32(user_srbcmd->lun);
523         srbcmd->timeout  = cpu_to_le32(user_srbcmd->timeout);
524         srbcmd->flags    = cpu_to_le32(flags);
525         srbcmd->retry_limit = 0; // Obsolete parameter
526         srbcmd->cdb_size = cpu_to_le32(user_srbcmd->cdb_size);
527         memcpy(srbcmd->cdb, user_srbcmd->cdb, sizeof(srbcmd->cdb));
528
529         switch (flags & (SRB_DataIn | SRB_DataOut)) {
530         case SRB_DataOut:
531                 data_dir = DMA_TO_DEVICE;
532                 break;
533         case (SRB_DataIn | SRB_DataOut):
534                 data_dir = DMA_BIDIRECTIONAL;
535                 break;
536         case SRB_DataIn:
537                 data_dir = DMA_FROM_DEVICE;
538                 break;
539         default:
540                 data_dir = DMA_NONE;
541         }
542         if (user_srbcmd->sg.count > ARRAY_SIZE(sg_list)) {
543                 dprintk((KERN_DEBUG"aacraid: too many sg entries %d\n",
544                   le32_to_cpu(srbcmd->sg.count)));
545                 rcode = -EINVAL;
546                 goto cleanup;
547         }
548         actual_fibsize = sizeof(struct aac_srb) - sizeof(struct sgentry) +
549                 ((user_srbcmd->sg.count & 0xff) * sizeof(struct sgentry));
550         actual_fibsize64 = actual_fibsize + (user_srbcmd->sg.count & 0xff) *
551           (sizeof(struct sgentry64) - sizeof(struct sgentry));
552         /* User made a mistake - should not continue */
553         if ((actual_fibsize != fibsize) && (actual_fibsize64 != fibsize)) {
554                 dprintk((KERN_DEBUG"aacraid: Bad Size specified in "
555                   "Raw SRB command calculated fibsize=%lu;%lu "
556                   "user_srbcmd->sg.count=%d aac_srb=%lu sgentry=%lu;%lu "
557                   "issued fibsize=%d\n",
558                   actual_fibsize, actual_fibsize64, user_srbcmd->sg.count,
559                   sizeof(struct aac_srb), sizeof(struct sgentry),
560                   sizeof(struct sgentry64), fibsize));
561                 rcode = -EINVAL;
562                 goto cleanup;
563         }
564         if ((data_dir == DMA_NONE) && user_srbcmd->sg.count) {
565                 dprintk((KERN_DEBUG"aacraid: SG with no direction specified in Raw SRB command\n"));
566                 rcode = -EINVAL;
567                 goto cleanup;
568         }
569         byte_count = 0;
570         if (dev->adapter_info.options & AAC_OPT_SGMAP_HOST64) {
571                 struct user_sgmap64* upsg = (struct user_sgmap64*)&user_srbcmd->sg;
572                 struct sgmap64* psg = (struct sgmap64*)&srbcmd->sg;
573
574                 /*
575                  * This should also catch if user used the 32 bit sgmap
576                  */
577                 if (actual_fibsize64 == fibsize) {
578                         actual_fibsize = actual_fibsize64;
579                         for (i = 0; i < upsg->count; i++) {
580                                 u64 addr;
581                                 void* p;
582                                 /* Does this really need to be GFP_DMA? */
583                                 p = kmalloc(upsg->sg[i].count,GFP_KERNEL|__GFP_DMA);
584                                 if(!p) {
585                                         dprintk((KERN_DEBUG"aacraid: Could not allocate SG buffer - size = %d buffer number %d of %d\n",
586                                           upsg->sg[i].count,i,upsg->count));
587                                         rcode = -ENOMEM;
588                                         goto cleanup;
589                                 }
590                                 addr = (u64)upsg->sg[i].addr[0];
591                                 addr += ((u64)upsg->sg[i].addr[1]) << 32;
592                                 sg_user[i] = (void __user *)(uintptr_t)addr;
593                                 sg_list[i] = p; // save so we can clean up later
594                                 sg_indx = i;
595
596                                 if (flags & SRB_DataOut) {
597                                         if(copy_from_user(p,sg_user[i],upsg->sg[i].count)){
598                                                 dprintk((KERN_DEBUG"aacraid: Could not copy sg data from user\n"));
599                                                 rcode = -EFAULT;
600                                                 goto cleanup;
601                                         }
602                                 }
603                                 addr = pci_map_single(dev->pdev, p, upsg->sg[i].count, data_dir);
604
605                                 psg->sg[i].addr[0] = cpu_to_le32(addr & 0xffffffff);
606                                 psg->sg[i].addr[1] = cpu_to_le32(addr>>32);
607                                 byte_count += upsg->sg[i].count;
608                                 psg->sg[i].count = cpu_to_le32(upsg->sg[i].count);
609                         }
610                 } else {
611                         struct user_sgmap* usg;
612                         usg = kmalloc(actual_fibsize - sizeof(struct aac_srb)
613                           + sizeof(struct sgmap), GFP_KERNEL);
614                         if (!usg) {
615                                 dprintk((KERN_DEBUG"aacraid: Allocation error in Raw SRB command\n"));
616                                 rcode = -ENOMEM;
617                                 goto cleanup;
618                         }
619                         memcpy (usg, upsg, actual_fibsize - sizeof(struct aac_srb)
620                           + sizeof(struct sgmap));
621                         actual_fibsize = actual_fibsize64;
622
623                         for (i = 0; i < usg->count; i++) {
624                                 u64 addr;
625                                 void* p;
626                                 /* Does this really need to be GFP_DMA? */
627                                 p = kmalloc(usg->sg[i].count,GFP_KERNEL|__GFP_DMA);
628                                 if(!p) {
629                                         kfree (usg);
630                                         dprintk((KERN_DEBUG"aacraid: Could not allocate SG buffer - size = %d buffer number %d of %d\n",
631                                           usg->sg[i].count,i,usg->count));
632                                         rcode = -ENOMEM;
633                                         goto cleanup;
634                                 }
635                                 sg_user[i] = (void __user *)(uintptr_t)usg->sg[i].addr;
636                                 sg_list[i] = p; // save so we can clean up later
637                                 sg_indx = i;
638
639                                 if (flags & SRB_DataOut) {
640                                         if(copy_from_user(p,sg_user[i],upsg->sg[i].count)){
641                                                 kfree (usg);
642                                                 dprintk((KERN_DEBUG"aacraid: Could not copy sg data from user\n"));
643                                                 rcode = -EFAULT;
644                                                 goto cleanup;
645                                         }
646                                 }
647                                 addr = pci_map_single(dev->pdev, p, usg->sg[i].count, data_dir);
648
649                                 psg->sg[i].addr[0] = cpu_to_le32(addr & 0xffffffff);
650                                 psg->sg[i].addr[1] = cpu_to_le32(addr>>32);
651                                 byte_count += usg->sg[i].count;
652                                 psg->sg[i].count = cpu_to_le32(usg->sg[i].count);
653                         }
654                         kfree (usg);
655                 }
656                 srbcmd->count = cpu_to_le32(byte_count);
657                 psg->count = cpu_to_le32(sg_indx+1);
658                 status = aac_fib_send(ScsiPortCommand64, srbfib, actual_fibsize, FsaNormal, 1, 1,NULL,NULL);
659         } else {
660                 struct user_sgmap* upsg = &user_srbcmd->sg;
661                 struct sgmap* psg = &srbcmd->sg;
662
663                 if (actual_fibsize64 == fibsize) {
664                         struct user_sgmap64* usg = (struct user_sgmap64 *)upsg;
665                         for (i = 0; i < upsg->count; i++) {
666                                 uintptr_t addr;
667                                 void* p;
668                                 /* Does this really need to be GFP_DMA? */
669                                 p = kmalloc(usg->sg[i].count,GFP_KERNEL|__GFP_DMA);
670                                 if(!p) {
671                                         dprintk((KERN_DEBUG"aacraid: Could not allocate SG buffer - size = %d buffer number %d of %d\n",
672                                           usg->sg[i].count,i,usg->count));
673                                         rcode = -ENOMEM;
674                                         goto cleanup;
675                                 }
676                                 addr = (u64)usg->sg[i].addr[0];
677                                 addr += ((u64)usg->sg[i].addr[1]) << 32;
678                                 sg_user[i] = (void __user *)addr;
679                                 sg_list[i] = p; // save so we can clean up later
680                                 sg_indx = i;
681
682                                 if (flags & SRB_DataOut) {
683                                         if(copy_from_user(p,sg_user[i],usg->sg[i].count)){
684                                                 dprintk((KERN_DEBUG"aacraid: Could not copy sg data from user\n"));
685                                                 rcode = -EFAULT;
686                                                 goto cleanup;
687                                         }
688                                 }
689                                 addr = pci_map_single(dev->pdev, p, usg->sg[i].count, data_dir);
690
691                                 psg->sg[i].addr = cpu_to_le32(addr & 0xffffffff);
692                                 byte_count += usg->sg[i].count;
693                                 psg->sg[i].count = cpu_to_le32(usg->sg[i].count);
694                         }
695                 } else {
696                         for (i = 0; i < upsg->count; i++) {
697                                 dma_addr_t addr;
698                                 void* p;
699                                 p = kmalloc(upsg->sg[i].count, GFP_KERNEL);
700                                 if (!p) {
701                                         dprintk((KERN_DEBUG"aacraid: Could not allocate SG buffer - size = %d buffer number %d of %d\n",
702                                           upsg->sg[i].count, i, upsg->count));
703                                         rcode = -ENOMEM;
704                                         goto cleanup;
705                                 }
706                                 sg_user[i] = (void __user *)(uintptr_t)upsg->sg[i].addr;
707                                 sg_list[i] = p; // save so we can clean up later
708                                 sg_indx = i;
709
710                                 if (flags & SRB_DataOut) {
711                                         if(copy_from_user(p, sg_user[i],
712                                                         upsg->sg[i].count)) {
713                                                 dprintk((KERN_DEBUG"aacraid: Could not copy sg data from user\n"));
714                                                 rcode = -EFAULT;
715                                                 goto cleanup;
716                                         }
717                                 }
718                                 addr = pci_map_single(dev->pdev, p,
719                                         upsg->sg[i].count, data_dir);
720
721                                 psg->sg[i].addr = cpu_to_le32(addr);
722                                 byte_count += upsg->sg[i].count;
723                                 psg->sg[i].count = cpu_to_le32(upsg->sg[i].count);
724                         }
725                 }
726                 srbcmd->count = cpu_to_le32(byte_count);
727                 psg->count = cpu_to_le32(sg_indx+1);
728                 status = aac_fib_send(ScsiPortCommand, srbfib, actual_fibsize, FsaNormal, 1, 1, NULL, NULL);
729         }
730         if (status == -EINTR) {
731                 rcode = -EINTR;
732                 goto cleanup;
733         }
734
735         if (status != 0){
736                 dprintk((KERN_DEBUG"aacraid: Could not send raw srb fib to hba\n"));
737                 rcode = -ENXIO;
738                 goto cleanup;
739         }
740
741         if (flags & SRB_DataIn) {
742                 for(i = 0 ; i <= sg_indx; i++){
743                         byte_count = le32_to_cpu(
744                           (dev->adapter_info.options & AAC_OPT_SGMAP_HOST64)
745                               ? ((struct sgmap64*)&srbcmd->sg)->sg[i].count
746                               : srbcmd->sg.sg[i].count);
747                         if(copy_to_user(sg_user[i], sg_list[i], byte_count)){
748                                 dprintk((KERN_DEBUG"aacraid: Could not copy sg data to user\n"));
749                                 rcode = -EFAULT;
750                                 goto cleanup;
751
752                         }
753                 }
754         }
755
756         reply = (struct aac_srb_reply *) fib_data(srbfib);
757         if(copy_to_user(user_reply,reply,sizeof(struct aac_srb_reply))){
758                 dprintk((KERN_DEBUG"aacraid: Could not copy reply to user\n"));
759                 rcode = -EFAULT;
760                 goto cleanup;
761         }
762
763 cleanup:
764         kfree(user_srbcmd);
765         for(i=0; i <= sg_indx; i++){
766                 kfree(sg_list[i]);
767         }
768         if (rcode != -EINTR) {
769                 aac_fib_complete(srbfib);
770                 aac_fib_free(srbfib);
771         }
772
773         return rcode;
774 }
775
776 struct aac_pci_info {
777         u32 bus;
778         u32 slot;
779 };
780
781
782 static int aac_get_pci_info(struct aac_dev* dev, void __user *arg)
783 {
784         struct aac_pci_info pci_info;
785
786         pci_info.bus = dev->pdev->bus->number;
787         pci_info.slot = PCI_SLOT(dev->pdev->devfn);
788
789        if (copy_to_user(arg, &pci_info, sizeof(struct aac_pci_info))) {
790                dprintk((KERN_DEBUG "aacraid: Could not copy pci info\n"));
791                return -EFAULT;
792         }
793         return 0;
794 }
795
796
797 int aac_do_ioctl(struct aac_dev * dev, int cmd, void __user *arg)
798 {
799         int status;
800
801         /*
802          *      HBA gets first crack
803          */
804
805         status = aac_dev_ioctl(dev, cmd, arg);
806         if(status != -ENOTTY)
807                 return status;
808
809         switch (cmd) {
810         case FSACTL_MINIPORT_REV_CHECK:
811                 status = check_revision(dev, arg);
812                 break;
813         case FSACTL_SEND_LARGE_FIB:
814         case FSACTL_SENDFIB:
815                 status = ioctl_send_fib(dev, arg);
816                 break;
817         case FSACTL_OPEN_GET_ADAPTER_FIB:
818                 status = open_getadapter_fib(dev, arg);
819                 break;
820         case FSACTL_GET_NEXT_ADAPTER_FIB:
821                 status = next_getadapter_fib(dev, arg);
822                 break;
823         case FSACTL_CLOSE_GET_ADAPTER_FIB:
824                 status = close_getadapter_fib(dev, arg);
825                 break;
826         case FSACTL_SEND_RAW_SRB:
827                 status = aac_send_raw_srb(dev,arg);
828                 break;
829         case FSACTL_GET_PCI_INFO:
830                 status = aac_get_pci_info(dev,arg);
831                 break;
832         default:
833                 status = -ENOTTY;
834                 break;
835         }
836         return status;
837 }
838