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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/scsi/aacraid/commctrl.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/scsi/aacraid/commctrl.c')
-rw-r--r--drivers/scsi/aacraid/commctrl.c683
1 files changed, 683 insertions, 0 deletions
diff --git a/drivers/scsi/aacraid/commctrl.c b/drivers/scsi/aacraid/commctrl.c
new file mode 100644
index 000000000000..30dd1f7120f4
--- /dev/null
+++ b/drivers/scsi/aacraid/commctrl.c
@@ -0,0 +1,683 @@
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 <asm/semaphore.h>
42#include <asm/uaccess.h>
43
44#include "aacraid.h"
45
46/**
47 * ioctl_send_fib - send a FIB from userspace
48 * @dev: adapter is being processed
49 * @arg: arguments to the ioctl call
50 *
51 * This routine sends a fib to the adapter on behalf of a user level
52 * program.
53 */
54
55static int ioctl_send_fib(struct aac_dev * dev, void __user *arg)
56{
57 struct hw_fib * kfib;
58 struct fib *fibptr;
59
60 fibptr = fib_alloc(dev);
61 if(fibptr == NULL)
62 return -ENOMEM;
63
64 kfib = fibptr->hw_fib;
65 /*
66 * First copy in the header so that we can check the size field.
67 */
68 if (copy_from_user((void *)kfib, arg, sizeof(struct aac_fibhdr))) {
69 fib_free(fibptr);
70 return -EFAULT;
71 }
72 /*
73 * Since we copy based on the fib header size, make sure that we
74 * will not overrun the buffer when we copy the memory. Return
75 * an error if we would.
76 */
77 if (le16_to_cpu(kfib->header.Size) >
78 sizeof(struct hw_fib) - sizeof(struct aac_fibhdr)) {
79 fib_free(fibptr);
80 return -EINVAL;
81 }
82
83 if (copy_from_user(kfib, arg, le16_to_cpu(kfib->header.Size) +
84 sizeof(struct aac_fibhdr))) {
85 fib_free(fibptr);
86 return -EFAULT;
87 }
88
89 if (kfib->header.Command == cpu_to_le32(TakeABreakPt)) {
90 aac_adapter_interrupt(dev);
91 /*
92 * Since we didn't really send a fib, zero out the state to allow
93 * cleanup code not to assert.
94 */
95 kfib->header.XferState = 0;
96 } else {
97 int retval = fib_send(kfib->header.Command, fibptr,
98 le16_to_cpu(kfib->header.Size) , FsaNormal,
99 1, 1, NULL, NULL);
100 if (retval) {
101 fib_free(fibptr);
102 return retval;
103 }
104 if (fib_complete(fibptr) != 0) {
105 fib_free(fibptr);
106 return -EINVAL;
107 }
108 }
109 /*
110 * Make sure that the size returned by the adapter (which includes
111 * the header) is less than or equal to the size of a fib, so we
112 * don't corrupt application data. Then copy that size to the user
113 * buffer. (Don't try to add the header information again, since it
114 * was already included by the adapter.)
115 */
116
117 if (copy_to_user(arg, (void *)kfib, kfib->header.Size)) {
118 fib_free(fibptr);
119 return -EFAULT;
120 }
121 fib_free(fibptr);
122 return 0;
123}
124
125/**
126 * open_getadapter_fib - Get the next fib
127 *
128 * This routine will get the next Fib, if available, from the AdapterFibContext
129 * passed in from the user.
130 */
131
132static int open_getadapter_fib(struct aac_dev * dev, void __user *arg)
133{
134 struct aac_fib_context * fibctx;
135 int status;
136
137 fibctx = kmalloc(sizeof(struct aac_fib_context), GFP_KERNEL);
138 if (fibctx == NULL) {
139 status = -ENOMEM;
140 } else {
141 unsigned long flags;
142 struct list_head * entry;
143 struct aac_fib_context * context;
144
145 fibctx->type = FSAFS_NTC_GET_ADAPTER_FIB_CONTEXT;
146 fibctx->size = sizeof(struct aac_fib_context);
147 /*
148 * Yes yes, I know this could be an index, but we have a
149 * better guarantee of uniqueness for the locked loop below.
150 * Without the aid of a persistent history, this also helps
151 * reduce the chance that the opaque context would be reused.
152 */
153 fibctx->unique = (u32)((ulong)fibctx & 0xFFFFFFFF);
154 /*
155 * Initialize the mutex used to wait for the next AIF.
156 */
157 init_MUTEX_LOCKED(&fibctx->wait_sem);
158 fibctx->wait = 0;
159 /*
160 * Initialize the fibs and set the count of fibs on
161 * the list to 0.
162 */
163 fibctx->count = 0;
164 INIT_LIST_HEAD(&fibctx->fib_list);
165 fibctx->jiffies = jiffies/HZ;
166 /*
167 * Now add this context onto the adapter's
168 * AdapterFibContext list.
169 */
170 spin_lock_irqsave(&dev->fib_lock, flags);
171 /* Ensure that we have a unique identifier */
172 entry = dev->fib_list.next;
173 while (entry != &dev->fib_list) {
174 context = list_entry(entry, struct aac_fib_context, next);
175 if (context->unique == fibctx->unique) {
176 /* Not unique (32 bits) */
177 fibctx->unique++;
178 entry = dev->fib_list.next;
179 } else {
180 entry = entry->next;
181 }
182 }
183 list_add_tail(&fibctx->next, &dev->fib_list);
184 spin_unlock_irqrestore(&dev->fib_lock, flags);
185 if (copy_to_user(arg, &fibctx->unique,
186 sizeof(fibctx->unique))) {
187 status = -EFAULT;
188 } else {
189 status = 0;
190 }
191 }
192 return status;
193}
194
195/**
196 * next_getadapter_fib - get the next fib
197 * @dev: adapter to use
198 * @arg: ioctl argument
199 *
200 * This routine will get the next Fib, if available, from the AdapterFibContext
201 * passed in from the user.
202 */
203
204static int next_getadapter_fib(struct aac_dev * dev, void __user *arg)
205{
206 struct fib_ioctl f;
207 struct fib *fib;
208 struct aac_fib_context *fibctx;
209 int status;
210 struct list_head * entry;
211 unsigned long flags;
212
213 if(copy_from_user((void *)&f, arg, sizeof(struct fib_ioctl)))
214 return -EFAULT;
215 /*
216 * Verify that the HANDLE passed in was a valid AdapterFibContext
217 *
218 * Search the list of AdapterFibContext addresses on the adapter
219 * to be sure this is a valid address
220 */
221 entry = dev->fib_list.next;
222 fibctx = NULL;
223
224 while (entry != &dev->fib_list) {
225 fibctx = list_entry(entry, struct aac_fib_context, next);
226 /*
227 * Extract the AdapterFibContext from the Input parameters.
228 */
229 if (fibctx->unique == f.fibctx) { /* We found a winner */
230 break;
231 }
232 entry = entry->next;
233 fibctx = NULL;
234 }
235 if (!fibctx) {
236 dprintk ((KERN_INFO "Fib Context not found\n"));
237 return -EINVAL;
238 }
239
240 if((fibctx->type != FSAFS_NTC_GET_ADAPTER_FIB_CONTEXT) ||
241 (fibctx->size != sizeof(struct aac_fib_context))) {
242 dprintk ((KERN_INFO "Fib Context corrupt?\n"));
243 return -EINVAL;
244 }
245 status = 0;
246 spin_lock_irqsave(&dev->fib_lock, flags);
247 /*
248 * If there are no fibs to send back, then either wait or return
249 * -EAGAIN
250 */
251return_fib:
252 if (!list_empty(&fibctx->fib_list)) {
253 struct list_head * entry;
254 /*
255 * Pull the next fib from the fibs
256 */
257 entry = fibctx->fib_list.next;
258 list_del(entry);
259
260 fib = list_entry(entry, struct fib, fiblink);
261 fibctx->count--;
262 spin_unlock_irqrestore(&dev->fib_lock, flags);
263 if (copy_to_user(f.fib, fib->hw_fib, sizeof(struct hw_fib))) {
264 kfree(fib->hw_fib);
265 kfree(fib);
266 return -EFAULT;
267 }
268 /*
269 * Free the space occupied by this copy of the fib.
270 */
271 kfree(fib->hw_fib);
272 kfree(fib);
273 status = 0;
274 fibctx->jiffies = jiffies/HZ;
275 } else {
276 spin_unlock_irqrestore(&dev->fib_lock, flags);
277 if (f.wait) {
278 if(down_interruptible(&fibctx->wait_sem) < 0) {
279 status = -EINTR;
280 } else {
281 /* Lock again and retry */
282 spin_lock_irqsave(&dev->fib_lock, flags);
283 goto return_fib;
284 }
285 } else {
286 status = -EAGAIN;
287 }
288 }
289 return status;
290}
291
292int aac_close_fib_context(struct aac_dev * dev, struct aac_fib_context * fibctx)
293{
294 struct fib *fib;
295
296 /*
297 * First free any FIBs that have not been consumed.
298 */
299 while (!list_empty(&fibctx->fib_list)) {
300 struct list_head * entry;
301 /*
302 * Pull the next fib from the fibs
303 */
304 entry = fibctx->fib_list.next;
305 list_del(entry);
306 fib = list_entry(entry, struct fib, fiblink);
307 fibctx->count--;
308 /*
309 * Free the space occupied by this copy of the fib.
310 */
311 kfree(fib->hw_fib);
312 kfree(fib);
313 }
314 /*
315 * Remove the Context from the AdapterFibContext List
316 */
317 list_del(&fibctx->next);
318 /*
319 * Invalidate context
320 */
321 fibctx->type = 0;
322 /*
323 * Free the space occupied by the Context
324 */
325 kfree(fibctx);
326 return 0;
327}
328
329/**
330 * close_getadapter_fib - close down user fib context
331 * @dev: adapter
332 * @arg: ioctl arguments
333 *
334 * This routine will close down the fibctx passed in from the user.
335 */
336
337static int close_getadapter_fib(struct aac_dev * dev, void __user *arg)
338{
339 struct aac_fib_context *fibctx;
340 int status;
341 unsigned long flags;
342 struct list_head * entry;
343
344 /*
345 * Verify that the HANDLE passed in was a valid AdapterFibContext
346 *
347 * Search the list of AdapterFibContext addresses on the adapter
348 * to be sure this is a valid address
349 */
350
351 entry = dev->fib_list.next;
352 fibctx = NULL;
353
354 while(entry != &dev->fib_list) {
355 fibctx = list_entry(entry, struct aac_fib_context, next);
356 /*
357 * Extract the fibctx from the input parameters
358 */
359 if (fibctx->unique == (u32)(unsigned long)arg) {
360 /* We found a winner */
361 break;
362 }
363 entry = entry->next;
364 fibctx = NULL;
365 }
366
367 if (!fibctx)
368 return 0; /* Already gone */
369
370 if((fibctx->type != FSAFS_NTC_GET_ADAPTER_FIB_CONTEXT) ||
371 (fibctx->size != sizeof(struct aac_fib_context)))
372 return -EINVAL;
373 spin_lock_irqsave(&dev->fib_lock, flags);
374 status = aac_close_fib_context(dev, fibctx);
375 spin_unlock_irqrestore(&dev->fib_lock, flags);
376 return status;
377}
378
379/**
380 * check_revision - close down user fib context
381 * @dev: adapter
382 * @arg: ioctl arguments
383 *
384 * This routine returns the driver version.
385 * Under Linux, there have been no version incompatibilities, so this is
386 * simple!
387 */
388
389static int check_revision(struct aac_dev *dev, void __user *arg)
390{
391 struct revision response;
392
393 response.compat = 1;
394 response.version = dev->adapter_info.kernelrev;
395 response.build = dev->adapter_info.kernelbuild;
396
397 if (copy_to_user(arg, &response, sizeof(response)))
398 return -EFAULT;
399 return 0;
400}
401
402/**
403 *
404 * aac_send_raw_scb
405 *
406 */
407
408int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
409{
410 struct fib* srbfib;
411 int status;
412 struct aac_srb *srbcmd;
413 struct aac_srb __user *user_srb = arg;
414 struct aac_srb_reply __user *user_reply;
415 struct aac_srb_reply* reply;
416 u32 fibsize = 0;
417 u32 flags = 0;
418 s32 rcode = 0;
419 u32 data_dir;
420 void __user *sg_user[32];
421 void *sg_list[32];
422 u32 sg_indx = 0;
423 u32 byte_count = 0;
424 u32 actual_fibsize = 0;
425 int i;
426
427
428 if (!capable(CAP_SYS_ADMIN)){
429 printk(KERN_DEBUG"aacraid: No permission to send raw srb\n");
430 return -EPERM;
431 }
432 /*
433 * Allocate and initialize a Fib then setup a BlockWrite command
434 */
435 if (!(srbfib = fib_alloc(dev))) {
436 return -1;
437 }
438 fib_init(srbfib);
439
440 srbcmd = (struct aac_srb*) fib_data(srbfib);
441
442 if(copy_from_user(&fibsize, &user_srb->count,sizeof(u32))){
443 printk(KERN_DEBUG"aacraid: Could not copy data size from user\n");
444 rcode = -EFAULT;
445 goto cleanup;
446 }
447
448 if (fibsize > FIB_DATA_SIZE_IN_BYTES) {
449 rcode = -EINVAL;
450 goto cleanup;
451 }
452
453 if(copy_from_user(srbcmd, user_srb,fibsize)){
454 printk(KERN_DEBUG"aacraid: Could not copy srb from user\n");
455 rcode = -EFAULT;
456 goto cleanup;
457 }
458
459 user_reply = arg+fibsize;
460
461 flags = srbcmd->flags;
462 // Fix up srb for endian and force some values
463 srbcmd->function = cpu_to_le32(SRBF_ExecuteScsi); // Force this
464 srbcmd->channel = cpu_to_le32(srbcmd->channel);
465 srbcmd->id = cpu_to_le32(srbcmd->id);
466 srbcmd->lun = cpu_to_le32(srbcmd->lun);
467 srbcmd->flags = cpu_to_le32(srbcmd->flags);
468 srbcmd->timeout = cpu_to_le32(srbcmd->timeout);
469 srbcmd->retry_limit =cpu_to_le32(0); // Obsolete parameter
470 srbcmd->cdb_size = cpu_to_le32(srbcmd->cdb_size);
471
472 switch (srbcmd->flags & (SRB_DataIn | SRB_DataOut)) {
473 case SRB_DataOut:
474 data_dir = DMA_TO_DEVICE;
475 break;
476 case (SRB_DataIn | SRB_DataOut):
477 data_dir = DMA_BIDIRECTIONAL;
478 break;
479 case SRB_DataIn:
480 data_dir = DMA_FROM_DEVICE;
481 break;
482 default:
483 data_dir = DMA_NONE;
484 }
485 if (dev->dac_support == 1) {
486 struct sgmap64* psg = (struct sgmap64*)&srbcmd->sg;
487 byte_count = 0;
488
489 /*
490 * This should also catch if user used the 32 bit sgmap
491 */
492 actual_fibsize = sizeof(struct aac_srb) -
493 sizeof(struct sgentry) + ((srbcmd->sg.count & 0xff) *
494 sizeof(struct sgentry64));
495 if(actual_fibsize != fibsize){ // User made a mistake - should not continue
496 printk(KERN_DEBUG"aacraid: Bad Size specified in Raw SRB command\n");
497 rcode = -EINVAL;
498 goto cleanup;
499 }
500 if ((data_dir == DMA_NONE) && psg->count) {
501 printk(KERN_DEBUG"aacraid: SG with no direction specified in Raw SRB command\n");
502 rcode = -EINVAL;
503 goto cleanup;
504 }
505
506 for (i = 0; i < psg->count; i++) {
507 dma_addr_t addr;
508 u64 le_addr;
509 void* p;
510 p = kmalloc(psg->sg[i].count,GFP_KERNEL|__GFP_DMA);
511 if(p == 0) {
512 printk(KERN_DEBUG"aacraid: Could not allocate SG buffer - size = %d buffer number %d of %d\n",
513 psg->sg[i].count,i,psg->count);
514 rcode = -ENOMEM;
515 goto cleanup;
516 }
517 sg_user[i] = (void __user *)psg->sg[i].addr;
518 sg_list[i] = p; // save so we can clean up later
519 sg_indx = i;
520
521 if( flags & SRB_DataOut ){
522 if(copy_from_user(p,sg_user[i],psg->sg[i].count)){
523 printk(KERN_DEBUG"aacraid: Could not copy sg data from user\n");
524 rcode = -EFAULT;
525 goto cleanup;
526 }
527 }
528 addr = pci_map_single(dev->pdev, p, psg->sg[i].count, data_dir);
529
530 le_addr = cpu_to_le64(addr);
531 psg->sg[i].addr[1] = (u32)(le_addr>>32);
532 psg->sg[i].addr[0] = (u32)(le_addr & 0xffffffff);
533 psg->sg[i].count = cpu_to_le32(psg->sg[i].count);
534 byte_count += psg->sg[i].count;
535 }
536
537 srbcmd->count = cpu_to_le32(byte_count);
538 status = fib_send(ScsiPortCommand64, srbfib, actual_fibsize, FsaNormal, 1, 1,NULL,NULL);
539 } else {
540 struct sgmap* psg = &srbcmd->sg;
541 byte_count = 0;
542
543 actual_fibsize = sizeof (struct aac_srb) +
544 (((le32_to_cpu(srbcmd->sg.count) & 0xff) - 1) *
545 sizeof (struct sgentry));
546 if(actual_fibsize != fibsize){ // User made a mistake - should not continue
547 printk(KERN_DEBUG"aacraid: Bad Size specified in Raw SRB command\n");
548 rcode = -EINVAL;
549 goto cleanup;
550 }
551 if ((data_dir == DMA_NONE) && psg->count) {
552 printk(KERN_DEBUG"aacraid: SG with no direction specified in Raw SRB command\n");
553 rcode = -EINVAL;
554 goto cleanup;
555 }
556 for (i = 0; i < psg->count; i++) {
557 dma_addr_t addr;
558 void* p;
559 p = kmalloc(psg->sg[i].count,GFP_KERNEL);
560 if(p == 0) {
561 printk(KERN_DEBUG"aacraid: Could not allocate SG buffer - size = %d buffer number %d of %d\n",
562 psg->sg[i].count,i,psg->count);
563 rcode = -ENOMEM;
564 goto cleanup;
565 }
566 sg_user[i] = (void __user *)(psg->sg[i].addr);
567 sg_list[i] = p; // save so we can clean up later
568 sg_indx = i;
569
570 if( flags & SRB_DataOut ){
571 if(copy_from_user(p,sg_user[i],psg->sg[i].count)){
572 printk(KERN_DEBUG"aacraid: Could not copy sg data from user\n");
573 rcode = -EFAULT;
574 goto cleanup;
575 }
576 }
577 addr = pci_map_single(dev->pdev, p, psg->sg[i].count, data_dir);
578
579 psg->sg[i].addr = cpu_to_le32(addr);
580 psg->sg[i].count = cpu_to_le32(psg->sg[i].count);
581 byte_count += psg->sg[i].count;
582 }
583 srbcmd->count = cpu_to_le32(byte_count);
584 status = fib_send(ScsiPortCommand, srbfib, actual_fibsize, FsaNormal, 1, 1, NULL, NULL);
585 }
586
587 if (status != 0){
588 printk(KERN_DEBUG"aacraid: Could not send raw srb fib to hba\n");
589 rcode = -1;
590 goto cleanup;
591 }
592
593 if( flags & SRB_DataIn ) {
594 for(i = 0 ; i <= sg_indx; i++){
595 if(copy_to_user(sg_user[i],sg_list[i],le32_to_cpu(srbcmd->sg.sg[i].count))){
596 printk(KERN_DEBUG"aacraid: Could not copy sg data to user\n");
597 rcode = -EFAULT;
598 goto cleanup;
599
600 }
601 }
602 }
603
604 reply = (struct aac_srb_reply *) fib_data(srbfib);
605 if(copy_to_user(user_reply,reply,sizeof(struct aac_srb_reply))){
606 printk(KERN_DEBUG"aacraid: Could not copy reply to user\n");
607 rcode = -EFAULT;
608 goto cleanup;
609 }
610
611cleanup:
612 for(i=0; i <= sg_indx; i++){
613 kfree(sg_list[i]);
614 }
615 fib_complete(srbfib);
616 fib_free(srbfib);
617
618 return rcode;
619}
620
621
622struct aac_pci_info {
623 u32 bus;
624 u32 slot;
625};
626
627
628int aac_get_pci_info(struct aac_dev* dev, void __user *arg)
629{
630 struct aac_pci_info pci_info;
631
632 pci_info.bus = dev->pdev->bus->number;
633 pci_info.slot = PCI_SLOT(dev->pdev->devfn);
634
635 if (copy_to_user(arg, &pci_info, sizeof(struct aac_pci_info))) {
636 printk(KERN_DEBUG "aacraid: Could not copy pci info\n");
637 return -EFAULT;
638 }
639 return 0;
640 }
641
642
643int aac_do_ioctl(struct aac_dev * dev, int cmd, void __user *arg)
644{
645 int status;
646
647 /*
648 * HBA gets first crack
649 */
650
651 status = aac_dev_ioctl(dev, cmd, arg);
652 if(status != -ENOTTY)
653 return status;
654
655 switch (cmd) {
656 case FSACTL_MINIPORT_REV_CHECK:
657 status = check_revision(dev, arg);
658 break;
659 case FSACTL_SENDFIB:
660 status = ioctl_send_fib(dev, arg);
661 break;
662 case FSACTL_OPEN_GET_ADAPTER_FIB:
663 status = open_getadapter_fib(dev, arg);
664 break;
665 case FSACTL_GET_NEXT_ADAPTER_FIB:
666 status = next_getadapter_fib(dev, arg);
667 break;
668 case FSACTL_CLOSE_GET_ADAPTER_FIB:
669 status = close_getadapter_fib(dev, arg);
670 break;
671 case FSACTL_SEND_RAW_SRB:
672 status = aac_send_raw_srb(dev,arg);
673 break;
674 case FSACTL_GET_PCI_INFO:
675 status = aac_get_pci_info(dev,arg);
676 break;
677 default:
678 status = -ENOTTY;
679 break;
680 }
681 return status;
682}
683