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Adding support for MOXA ART SoC. Testing port of linux-2.6.32.60-moxart.
[linux-3.6.7-moxart.git] / drivers / message / i2o / i2o_config.c
blob9a49c243a6ac59c78c98cd9de021429d44aa8908
1 /*
2 * I2O Configuration Interface Driver
3 *
4 * (C) Copyright 1999-2002 Red Hat
5 *
6 * Written by Alan Cox, Building Number Three Ltd
7 *
8 * Fixes/additions:
9 * Deepak Saxena (04/20/1999):
10 * Added basic ioctl() support
11 * Deepak Saxena (06/07/1999):
12 * Added software download ioctl (still testing)
13 * Auvo Häkkinen (09/10/1999):
14 * Changes to i2o_cfg_reply(), ioctl_parms()
15 * Added ioct_validate()
16 * Taneli Vähäkangas (09/30/1999):
17 * Fixed ioctl_swdl()
18 * Taneli Vähäkangas (10/04/1999):
19 * Changed ioctl_swdl(), implemented ioctl_swul() and ioctl_swdel()
20 * Deepak Saxena (11/18/1999):
21 * Added event managmenet support
22 * Alan Cox <alan@lxorguk.ukuu.org.uk>:
23 * 2.4 rewrite ported to 2.5
24 * Markus Lidel <Markus.Lidel@shadowconnect.com>:
25 * Added pass-thru support for Adaptec's raidutils
26 *
27 * This program is free software; you can redistribute it and/or
28 * modify it under the terms of the GNU General Public License
29 * as published by the Free Software Foundation; either version
30 * 2 of the License, or (at your option) any later version.
31 */
32
33 #include <linux/miscdevice.h>
34 #include <linux/mutex.h>
35 #include <linux/compat.h>
36 #include <linux/slab.h>
37
38 #include <asm/uaccess.h>
39
40 #include "core.h"
41
42 #define SG_TABLESIZE 30
43
44 static DEFINE_MUTEX(i2o_cfg_mutex);
45 static long i2o_cfg_ioctl(struct file *, unsigned int, unsigned long);
46
47 static spinlock_t i2o_config_lock;
48
49 #define MODINC(x,y) ((x) = ((x) + 1) % (y))
50
51 struct sg_simple_element {
52 u32 flag_count;
53 u32 addr_bus;
54 };
55
56 struct i2o_cfg_info {
57 struct file *fp;
58 struct fasync_struct *fasync;
59 struct i2o_evt_info event_q[I2O_EVT_Q_LEN];
60 u16 q_in; // Queue head index
61 u16 q_out; // Queue tail index
62 u16 q_len; // Queue length
63 u16 q_lost; // Number of lost events
64 ulong q_id; // Event queue ID...used as tx_context
65 struct i2o_cfg_info *next;
66 };
67 static struct i2o_cfg_info *open_files = NULL;
68 static ulong i2o_cfg_info_id = 0;
69
70 static int i2o_cfg_getiops(unsigned long arg)
71 {
72 struct i2o_controller *c;
73 u8 __user *user_iop_table = (void __user *)arg;
74 u8 tmp[MAX_I2O_CONTROLLERS];
75 int ret = 0;
76
77 memset(tmp, 0, MAX_I2O_CONTROLLERS);
78
79 list_for_each_entry(c, &i2o_controllers, list)
80 tmp[c->unit] = 1;
81
82 if (copy_to_user(user_iop_table, tmp, MAX_I2O_CONTROLLERS))
83 ret = -EFAULT;
84
85 return ret;
86 };
87
88 static int i2o_cfg_gethrt(unsigned long arg)
89 {
90 struct i2o_controller *c;
91 struct i2o_cmd_hrtlct __user *cmd = (struct i2o_cmd_hrtlct __user *)arg;
92 struct i2o_cmd_hrtlct kcmd;
93 i2o_hrt *hrt;
94 int len;
95 u32 reslen;
96 int ret = 0;
97
98 if (copy_from_user(&kcmd, cmd, sizeof(struct i2o_cmd_hrtlct)))
99 return -EFAULT;
100
101 if (get_user(reslen, kcmd.reslen) < 0)
102 return -EFAULT;
103
104 if (kcmd.resbuf == NULL)
105 return -EFAULT;
106
107 c = i2o_find_iop(kcmd.iop);
108 if (!c)
109 return -ENXIO;
110
111 hrt = (i2o_hrt *) c->hrt.virt;
112
113 len = 8 + ((hrt->entry_len * hrt->num_entries) << 2);
114
115 if (put_user(len, kcmd.reslen))
116 ret = -EFAULT;
117 else if (len > reslen)
118 ret = -ENOBUFS;
119 else if (copy_to_user(kcmd.resbuf, (void *)hrt, len))
120 ret = -EFAULT;
121
122 return ret;
123 };
124
125 static int i2o_cfg_getlct(unsigned long arg)
126 {
127 struct i2o_controller *c;
128 struct i2o_cmd_hrtlct __user *cmd = (struct i2o_cmd_hrtlct __user *)arg;
129 struct i2o_cmd_hrtlct kcmd;
130 i2o_lct *lct;
131 int len;
132 int ret = 0;
133 u32 reslen;
134
135 if (copy_from_user(&kcmd, cmd, sizeof(struct i2o_cmd_hrtlct)))
136 return -EFAULT;
137
138 if (get_user(reslen, kcmd.reslen) < 0)
139 return -EFAULT;
140
141 if (kcmd.resbuf == NULL)
142 return -EFAULT;
143
144 c = i2o_find_iop(kcmd.iop);
145 if (!c)
146 return -ENXIO;
147
148 lct = (i2o_lct *) c->lct;
149
150 len = (unsigned int)lct->table_size << 2;
151 if (put_user(len, kcmd.reslen))
152 ret = -EFAULT;
153 else if (len > reslen)
154 ret = -ENOBUFS;
155 else if (copy_to_user(kcmd.resbuf, lct, len))
156 ret = -EFAULT;
157
158 return ret;
159 };
160
161 static int i2o_cfg_parms(unsigned long arg, unsigned int type)
162 {
163 int ret = 0;
164 struct i2o_controller *c;
165 struct i2o_device *dev;
166 struct i2o_cmd_psetget __user *cmd =
167 (struct i2o_cmd_psetget __user *)arg;
168 struct i2o_cmd_psetget kcmd;
169 u32 reslen;
170 u8 *ops;
171 u8 *res;
172 int len = 0;
173
174 u32 i2o_cmd = (type == I2OPARMGET ?
175 I2O_CMD_UTIL_PARAMS_GET : I2O_CMD_UTIL_PARAMS_SET);
176
177 if (copy_from_user(&kcmd, cmd, sizeof(struct i2o_cmd_psetget)))
178 return -EFAULT;
179
180 if (get_user(reslen, kcmd.reslen))
181 return -EFAULT;
182
183 c = i2o_find_iop(kcmd.iop);
184 if (!c)
185 return -ENXIO;
186
187 dev = i2o_iop_find_device(c, kcmd.tid);
188 if (!dev)
189 return -ENXIO;
190
191 /*
192 * Stop users being able to try and allocate arbitary amounts
193 * of DMA space. 64K is way more than sufficient for this.
194 */
195 if (kcmd.oplen > 65536)
196 return -EMSGSIZE;
197
198 ops = memdup_user(kcmd.opbuf, kcmd.oplen);
199 if (IS_ERR(ops))
200 return PTR_ERR(ops);
201
202 /*
203 * It's possible to have a _very_ large table
204 * and that the user asks for all of it at once...
205 */
206 res = kmalloc(65536, GFP_KERNEL);
207 if (!res) {
208 kfree(ops);
209 return -ENOMEM;
210 }
211
212 len = i2o_parm_issue(dev, i2o_cmd, ops, kcmd.oplen, res, 65536);
213 kfree(ops);
214
215 if (len < 0) {
216 kfree(res);
217 return -EAGAIN;
218 }
219
220 if (put_user(len, kcmd.reslen))
221 ret = -EFAULT;
222 else if (len > reslen)
223 ret = -ENOBUFS;
224 else if (copy_to_user(kcmd.resbuf, res, len))
225 ret = -EFAULT;
226
227 kfree(res);
228
229 return ret;
230 };
231
232 static int i2o_cfg_swdl(unsigned long arg)
233 {
234 struct i2o_sw_xfer kxfer;
235 struct i2o_sw_xfer __user *pxfer = (struct i2o_sw_xfer __user *)arg;
236 unsigned char maxfrag = 0, curfrag = 1;
237 struct i2o_dma buffer;
238 struct i2o_message *msg;
239 unsigned int status = 0, swlen = 0, fragsize = 8192;
240 struct i2o_controller *c;
241
242 if (copy_from_user(&kxfer, pxfer, sizeof(struct i2o_sw_xfer)))
243 return -EFAULT;
244
245 if (get_user(swlen, kxfer.swlen) < 0)
246 return -EFAULT;
247
248 if (get_user(maxfrag, kxfer.maxfrag) < 0)
249 return -EFAULT;
250
251 if (get_user(curfrag, kxfer.curfrag) < 0)
252 return -EFAULT;
253
254 if (curfrag == maxfrag)
255 fragsize = swlen - (maxfrag - 1) * 8192;
256
257 if (!kxfer.buf || !access_ok(VERIFY_READ, kxfer.buf, fragsize))
258 return -EFAULT;
259
260 c = i2o_find_iop(kxfer.iop);
261 if (!c)
262 return -ENXIO;
263
264 msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
265 if (IS_ERR(msg))
266 return PTR_ERR(msg);
267
268 if (i2o_dma_alloc(&c->pdev->dev, &buffer, fragsize)) {
269 i2o_msg_nop(c, msg);
270 return -ENOMEM;
271 }
272
273 if (__copy_from_user(buffer.virt, kxfer.buf, fragsize)) {
274 i2o_msg_nop(c, msg);
275 i2o_dma_free(&c->pdev->dev, &buffer);
276 return -EFAULT;
277 }
278
279 msg->u.head[0] = cpu_to_le32(NINE_WORD_MSG_SIZE | SGL_OFFSET_7);
280 msg->u.head[1] =
281 cpu_to_le32(I2O_CMD_SW_DOWNLOAD << 24 | HOST_TID << 12 |
282 ADAPTER_TID);
283 msg->u.head[2] = cpu_to_le32(i2o_config_driver.context);
284 msg->u.head[3] = cpu_to_le32(0);
285 msg->body[0] =
286 cpu_to_le32((((u32) kxfer.flags) << 24) | (((u32) kxfer.
287 sw_type) << 16) |
288 (((u32) maxfrag) << 8) | (((u32) curfrag)));
289 msg->body[1] = cpu_to_le32(swlen);
290 msg->body[2] = cpu_to_le32(kxfer.sw_id);
291 msg->body[3] = cpu_to_le32(0xD0000000 | fragsize);
292 msg->body[4] = cpu_to_le32(buffer.phys);
293
294 osm_debug("swdl frag %d/%d (size %d)\n", curfrag, maxfrag, fragsize);
295 status = i2o_msg_post_wait_mem(c, msg, 60, &buffer);
296
297 if (status != -ETIMEDOUT)
298 i2o_dma_free(&c->pdev->dev, &buffer);
299
300 if (status != I2O_POST_WAIT_OK) {
301 // it fails if you try and send frags out of order
302 // and for some yet unknown reasons too
303 osm_info("swdl failed, DetailedStatus = %d\n", status);
304 return status;
305 }
306
307 return 0;
308 };
309
310 static int i2o_cfg_swul(unsigned long arg)
311 {
312 struct i2o_sw_xfer kxfer;
313 struct i2o_sw_xfer __user *pxfer = (struct i2o_sw_xfer __user *)arg;
314 unsigned char maxfrag = 0, curfrag = 1;
315 struct i2o_dma buffer;
316 struct i2o_message *msg;
317 unsigned int status = 0, swlen = 0, fragsize = 8192;
318 struct i2o_controller *c;
319 int ret = 0;
320
321 if (copy_from_user(&kxfer, pxfer, sizeof(struct i2o_sw_xfer)))
322 return -EFAULT;
323
324 if (get_user(swlen, kxfer.swlen) < 0)
325 return -EFAULT;
326
327 if (get_user(maxfrag, kxfer.maxfrag) < 0)
328 return -EFAULT;
329
330 if (get_user(curfrag, kxfer.curfrag) < 0)
331 return -EFAULT;
332
333 if (curfrag == maxfrag)
334 fragsize = swlen - (maxfrag - 1) * 8192;
335
336 if (!kxfer.buf)
337 return -EFAULT;
338
339 c = i2o_find_iop(kxfer.iop);
340 if (!c)
341 return -ENXIO;
342
343 msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
344 if (IS_ERR(msg))
345 return PTR_ERR(msg);
346
347 if (i2o_dma_alloc(&c->pdev->dev, &buffer, fragsize)) {
348 i2o_msg_nop(c, msg);
349 return -ENOMEM;
350 }
351
352 msg->u.head[0] = cpu_to_le32(NINE_WORD_MSG_SIZE | SGL_OFFSET_7);
353 msg->u.head[1] =
354 cpu_to_le32(I2O_CMD_SW_UPLOAD << 24 | HOST_TID << 12 | ADAPTER_TID);
355 msg->u.head[2] = cpu_to_le32(i2o_config_driver.context);
356 msg->u.head[3] = cpu_to_le32(0);
357 msg->body[0] =
358 cpu_to_le32((u32) kxfer.flags << 24 | (u32) kxfer.
359 sw_type << 16 | (u32) maxfrag << 8 | (u32) curfrag);
360 msg->body[1] = cpu_to_le32(swlen);
361 msg->body[2] = cpu_to_le32(kxfer.sw_id);
362 msg->body[3] = cpu_to_le32(0xD0000000 | fragsize);
363 msg->body[4] = cpu_to_le32(buffer.phys);
364
365 osm_debug("swul frag %d/%d (size %d)\n", curfrag, maxfrag, fragsize);
366 status = i2o_msg_post_wait_mem(c, msg, 60, &buffer);
367
368 if (status != I2O_POST_WAIT_OK) {
369 if (status != -ETIMEDOUT)
370 i2o_dma_free(&c->pdev->dev, &buffer);
371
372 osm_info("swul failed, DetailedStatus = %d\n", status);
373 return status;
374 }
375
376 if (copy_to_user(kxfer.buf, buffer.virt, fragsize))
377 ret = -EFAULT;
378
379 i2o_dma_free(&c->pdev->dev, &buffer);
380
381 return ret;
382 }
383
384 static int i2o_cfg_swdel(unsigned long arg)
385 {
386 struct i2o_controller *c;
387 struct i2o_sw_xfer kxfer;
388 struct i2o_sw_xfer __user *pxfer = (struct i2o_sw_xfer __user *)arg;
389 struct i2o_message *msg;
390 unsigned int swlen;
391 int token;
392
393 if (copy_from_user(&kxfer, pxfer, sizeof(struct i2o_sw_xfer)))
394 return -EFAULT;
395
396 if (get_user(swlen, kxfer.swlen) < 0)
397 return -EFAULT;
398
399 c = i2o_find_iop(kxfer.iop);
400 if (!c)
401 return -ENXIO;
402
403 msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
404 if (IS_ERR(msg))
405 return PTR_ERR(msg);
406
407 msg->u.head[0] = cpu_to_le32(SEVEN_WORD_MSG_SIZE | SGL_OFFSET_0);
408 msg->u.head[1] =
409 cpu_to_le32(I2O_CMD_SW_REMOVE << 24 | HOST_TID << 12 | ADAPTER_TID);
410 msg->u.head[2] = cpu_to_le32(i2o_config_driver.context);
411 msg->u.head[3] = cpu_to_le32(0);
412 msg->body[0] =
413 cpu_to_le32((u32) kxfer.flags << 24 | (u32) kxfer.sw_type << 16);
414 msg->body[1] = cpu_to_le32(swlen);
415 msg->body[2] = cpu_to_le32(kxfer.sw_id);
416
417 token = i2o_msg_post_wait(c, msg, 10);
418
419 if (token != I2O_POST_WAIT_OK) {
420 osm_info("swdel failed, DetailedStatus = %d\n", token);
421 return -ETIMEDOUT;
422 }
423
424 return 0;
425 };
426
427 static int i2o_cfg_validate(unsigned long arg)
428 {
429 int token;
430 int iop = (int)arg;
431 struct i2o_message *msg;
432 struct i2o_controller *c;
433
434 c = i2o_find_iop(iop);
435 if (!c)
436 return -ENXIO;
437
438 msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
439 if (IS_ERR(msg))
440 return PTR_ERR(msg);
441
442 msg->u.head[0] = cpu_to_le32(FOUR_WORD_MSG_SIZE | SGL_OFFSET_0);
443 msg->u.head[1] =
444 cpu_to_le32(I2O_CMD_CONFIG_VALIDATE << 24 | HOST_TID << 12 | iop);
445 msg->u.head[2] = cpu_to_le32(i2o_config_driver.context);
446 msg->u.head[3] = cpu_to_le32(0);
447
448 token = i2o_msg_post_wait(c, msg, 10);
449
450 if (token != I2O_POST_WAIT_OK) {
451 osm_info("Can't validate configuration, ErrorStatus = %d\n",
452 token);
453 return -ETIMEDOUT;
454 }
455
456 return 0;
457 };
458
459 static int i2o_cfg_evt_reg(unsigned long arg, struct file *fp)
460 {
461 struct i2o_message *msg;
462 struct i2o_evt_id __user *pdesc = (struct i2o_evt_id __user *)arg;
463 struct i2o_evt_id kdesc;
464 struct i2o_controller *c;
465 struct i2o_device *d;
466
467 if (copy_from_user(&kdesc, pdesc, sizeof(struct i2o_evt_id)))
468 return -EFAULT;
469
470 /* IOP exists? */
471 c = i2o_find_iop(kdesc.iop);
472 if (!c)
473 return -ENXIO;
474
475 /* Device exists? */
476 d = i2o_iop_find_device(c, kdesc.tid);
477 if (!d)
478 return -ENODEV;
479
480 msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
481 if (IS_ERR(msg))
482 return PTR_ERR(msg);
483
484 msg->u.head[0] = cpu_to_le32(FOUR_WORD_MSG_SIZE | SGL_OFFSET_0);
485 msg->u.head[1] =
486 cpu_to_le32(I2O_CMD_UTIL_EVT_REGISTER << 24 | HOST_TID << 12 |
487 kdesc.tid);
488 msg->u.head[2] = cpu_to_le32(i2o_config_driver.context);
489 msg->u.head[3] = cpu_to_le32(i2o_cntxt_list_add(c, fp->private_data));
490 msg->body[0] = cpu_to_le32(kdesc.evt_mask);
491
492 i2o_msg_post(c, msg);
493
494 return 0;
495 }
496
497 static int i2o_cfg_evt_get(unsigned long arg, struct file *fp)
498 {
499 struct i2o_cfg_info *p = NULL;
500 struct i2o_evt_get __user *uget = (struct i2o_evt_get __user *)arg;
501 struct i2o_evt_get kget;
502 unsigned long flags;
503
504 for (p = open_files; p; p = p->next)
505 if (p->q_id == (ulong) fp->private_data)
506 break;
507
508 if (!p->q_len)
509 return -ENOENT;
510
511 memcpy(&kget.info, &p->event_q[p->q_out], sizeof(struct i2o_evt_info));
512 MODINC(p->q_out, I2O_EVT_Q_LEN);
513 spin_lock_irqsave(&i2o_config_lock, flags);
514 p->q_len--;
515 kget.pending = p->q_len;
516 kget.lost = p->q_lost;
517 spin_unlock_irqrestore(&i2o_config_lock, flags);
518
519 if (copy_to_user(uget, &kget, sizeof(struct i2o_evt_get)))
520 return -EFAULT;
521 return 0;
522 }
523
524 #ifdef CONFIG_COMPAT
525 static int i2o_cfg_passthru32(struct file *file, unsigned cmnd,
526 unsigned long arg)
527 {
528 struct i2o_cmd_passthru32 __user *cmd;
529 struct i2o_controller *c;
530 u32 __user *user_msg;
531 u32 *reply = NULL;
532 u32 __user *user_reply = NULL;
533 u32 size = 0;
534 u32 reply_size = 0;
535 u32 rcode = 0;
536 struct i2o_dma sg_list[SG_TABLESIZE];
537 u32 sg_offset = 0;
538 u32 sg_count = 0;
539 u32 i = 0;
540 u32 sg_index = 0;
541 i2o_status_block *sb;
542 struct i2o_message *msg;
543 unsigned int iop;
544
545 cmd = (struct i2o_cmd_passthru32 __user *)arg;
546
547 if (get_user(iop, &cmd->iop) || get_user(i, &cmd->msg))
548 return -EFAULT;
549
550 user_msg = compat_ptr(i);
551
552 c = i2o_find_iop(iop);
553 if (!c) {
554 osm_debug("controller %d not found\n", iop);
555 return -ENXIO;
556 }
557
558 sb = c->status_block.virt;
559
560 if (get_user(size, &user_msg[0])) {
561 osm_warn("unable to get size!\n");
562 return -EFAULT;
563 }
564 size = size >> 16;
565
566 if (size > sb->inbound_frame_size) {
567 osm_warn("size of message > inbound_frame_size");
568 return -EFAULT;
569 }
570
571 user_reply = &user_msg[size];
572
573 size <<= 2; // Convert to bytes
574
575 msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
576 if (IS_ERR(msg))
577 return PTR_ERR(msg);
578
579 rcode = -EFAULT;
580 /* Copy in the user's I2O command */
581 if (copy_from_user(msg, user_msg, size)) {
582 osm_warn("unable to copy user message\n");
583 goto out;
584 }
585 i2o_dump_message(msg);
586
587 if (get_user(reply_size, &user_reply[0]) < 0)
588 goto out;
589
590 reply_size >>= 16;
591 reply_size <<= 2;
592
593 rcode = -ENOMEM;
594 reply = kzalloc(reply_size, GFP_KERNEL);
595 if (!reply) {
596 printk(KERN_WARNING "%s: Could not allocate reply buffer\n",
597 c->name);
598 goto out;
599 }
600
601 sg_offset = (msg->u.head[0] >> 4) & 0x0f;
602
603 memset(sg_list, 0, sizeof(sg_list[0]) * SG_TABLESIZE);
604 if (sg_offset) {
605 struct sg_simple_element *sg;
606
607 if (sg_offset * 4 >= size) {
608 rcode = -EFAULT;
609 goto cleanup;
610 }
611 // TODO 64bit fix
612 sg = (struct sg_simple_element *)((&msg->u.head[0]) +
613 sg_offset);
614 sg_count =
615 (size - sg_offset * 4) / sizeof(struct sg_simple_element);
616 if (sg_count > SG_TABLESIZE) {
617 printk(KERN_DEBUG "%s:IOCTL SG List too large (%u)\n",
618 c->name, sg_count);
619 rcode = -EINVAL;
620 goto cleanup;
621 }
622
623 for (i = 0; i < sg_count; i++) {
624 int sg_size;
625 struct i2o_dma *p;
626
627 if (!(sg[i].flag_count & 0x10000000
628 /*I2O_SGL_FLAGS_SIMPLE_ADDRESS_ELEMENT */ )) {
629 printk(KERN_DEBUG
630 "%s:Bad SG element %d - not simple (%x)\n",
631 c->name, i, sg[i].flag_count);
632 rcode = -EINVAL;
633 goto cleanup;
634 }
635 sg_size = sg[i].flag_count & 0xffffff;
636 p = &(sg_list[sg_index]);
637 /* Allocate memory for the transfer */
638 if (i2o_dma_alloc(&c->pdev->dev, p, sg_size)) {
639 printk(KERN_DEBUG
640 "%s: Could not allocate SG buffer - size = %d buffer number %d of %d\n",
641 c->name, sg_size, i, sg_count);
642 rcode = -ENOMEM;
643 goto sg_list_cleanup;
644 }
645 sg_index++;
646 /* Copy in the user's SG buffer if necessary */
647 if (sg[i].
648 flag_count & 0x04000000 /*I2O_SGL_FLAGS_DIR */ ) {
649 // TODO 64bit fix
650 if (copy_from_user
651 (p->virt,
652 (void __user *)(unsigned long)sg[i].
653 addr_bus, sg_size)) {
654 printk(KERN_DEBUG
655 "%s: Could not copy SG buf %d FROM user\n",
656 c->name, i);
657 rcode = -EFAULT;
658 goto sg_list_cleanup;
659 }
660 }
661 //TODO 64bit fix
662 sg[i].addr_bus = (u32) p->phys;
663 }
664 }
665
666 rcode = i2o_msg_post_wait(c, msg, 60);
667 msg = NULL;
668 if (rcode) {
669 reply[4] = ((u32) rcode) << 24;
670 goto sg_list_cleanup;
671 }
672
673 if (sg_offset) {
674 u32 rmsg[I2O_OUTBOUND_MSG_FRAME_SIZE];
675 /* Copy back the Scatter Gather buffers back to user space */
676 u32 j;
677 // TODO 64bit fix
678 struct sg_simple_element *sg;
679 int sg_size;
680
681 // re-acquire the original message to handle correctly the sg copy operation
682 memset(&rmsg, 0, I2O_OUTBOUND_MSG_FRAME_SIZE * 4);
683 // get user msg size in u32s
684 if (get_user(size, &user_msg[0])) {
685 rcode = -EFAULT;
686 goto sg_list_cleanup;
687 }
688 size = size >> 16;
689 size *= 4;
690 /* Copy in the user's I2O command */
691 if (copy_from_user(rmsg, user_msg, size)) {
692 rcode = -EFAULT;
693 goto sg_list_cleanup;
694 }
695 sg_count =
696 (size - sg_offset * 4) / sizeof(struct sg_simple_element);
697
698 // TODO 64bit fix
699 sg = (struct sg_simple_element *)(rmsg + sg_offset);
700 for (j = 0; j < sg_count; j++) {
701 /* Copy out the SG list to user's buffer if necessary */
702 if (!
703 (sg[j].
704 flag_count & 0x4000000 /*I2O_SGL_FLAGS_DIR */ )) {
705 sg_size = sg[j].flag_count & 0xffffff;
706 // TODO 64bit fix
707 if (copy_to_user
708 ((void __user *)(u64) sg[j].addr_bus,
709 sg_list[j].virt, sg_size)) {
710 printk(KERN_WARNING
711 "%s: Could not copy %p TO user %x\n",
712 c->name, sg_list[j].virt,
713 sg[j].addr_bus);
714 rcode = -EFAULT;
715 goto sg_list_cleanup;
716 }
717 }
718 }
719 }
720
721 sg_list_cleanup:
722 /* Copy back the reply to user space */
723 if (reply_size) {
724 // we wrote our own values for context - now restore the user supplied ones
725 if (copy_from_user(reply + 2, user_msg + 2, sizeof(u32) * 2)) {
726 printk(KERN_WARNING
727 "%s: Could not copy message context FROM user\n",
728 c->name);
729 rcode = -EFAULT;
730 }
731 if (copy_to_user(user_reply, reply, reply_size)) {
732 printk(KERN_WARNING
733 "%s: Could not copy reply TO user\n", c->name);
734 rcode = -EFAULT;
735 }
736 }
737 for (i = 0; i < sg_index; i++)
738 i2o_dma_free(&c->pdev->dev, &sg_list[i]);
739
740 cleanup:
741 kfree(reply);
742 out:
743 if (msg)
744 i2o_msg_nop(c, msg);
745 return rcode;
746 }
747
748 static long i2o_cfg_compat_ioctl(struct file *file, unsigned cmd,
749 unsigned long arg)
750 {
751 int ret;
752 mutex_lock(&i2o_cfg_mutex);
753 switch (cmd) {
754 case I2OGETIOPS:
755 ret = i2o_cfg_ioctl(file, cmd, arg);
756 break;
757 case I2OPASSTHRU32:
758 ret = i2o_cfg_passthru32(file, cmd, arg);
759 break;
760 default:
761 ret = -ENOIOCTLCMD;
762 break;
763 }
764 mutex_unlock(&i2o_cfg_mutex);
765 return ret;
766 }
767
768 #endif
769
770 #ifdef CONFIG_I2O_EXT_ADAPTEC
771 static int i2o_cfg_passthru(unsigned long arg)
772 {
773 struct i2o_cmd_passthru __user *cmd =
774 (struct i2o_cmd_passthru __user *)arg;
775 struct i2o_controller *c;
776 u32 __user *user_msg;
777 u32 *reply = NULL;
778 u32 __user *user_reply = NULL;
779 u32 size = 0;
780 u32 reply_size = 0;
781 u32 rcode = 0;
782 struct i2o_dma sg_list[SG_TABLESIZE];
783 u32 sg_offset = 0;
784 u32 sg_count = 0;
785 int sg_index = 0;
786 u32 i = 0;
787 i2o_status_block *sb;
788 struct i2o_message *msg;
789 unsigned int iop;
790
791 if (get_user(iop, &cmd->iop) || get_user(user_msg, &cmd->msg))
792 return -EFAULT;
793
794 c = i2o_find_iop(iop);
795 if (!c) {
796 osm_warn("controller %d not found\n", iop);
797 return -ENXIO;
798 }
799
800 sb = c->status_block.virt;
801
802 if (get_user(size, &user_msg[0]))
803 return -EFAULT;
804 size = size >> 16;
805
806 if (size > sb->inbound_frame_size) {
807 osm_warn("size of message > inbound_frame_size");
808 return -EFAULT;
809 }
810
811 user_reply = &user_msg[size];
812
813 size <<= 2; // Convert to bytes
814
815 msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
816 if (IS_ERR(msg))
817 return PTR_ERR(msg);
818
819 rcode = -EFAULT;
820 /* Copy in the user's I2O command */
821 if (copy_from_user(msg, user_msg, size))
822 goto out;
823
824 if (get_user(reply_size, &user_reply[0]) < 0)
825 goto out;
826
827 reply_size >>= 16;
828 reply_size <<= 2;
829
830 reply = kzalloc(reply_size, GFP_KERNEL);
831 if (!reply) {
832 printk(KERN_WARNING "%s: Could not allocate reply buffer\n",
833 c->name);
834 rcode = -ENOMEM;
835 goto out;
836 }
837
838 sg_offset = (msg->u.head[0] >> 4) & 0x0f;
839
840 memset(sg_list, 0, sizeof(sg_list[0]) * SG_TABLESIZE);
841 if (sg_offset) {
842 struct sg_simple_element *sg;
843 struct i2o_dma *p;
844
845 if (sg_offset * 4 >= size) {
846 rcode = -EFAULT;
847 goto cleanup;
848 }
849 // TODO 64bit fix
850 sg = (struct sg_simple_element *)((&msg->u.head[0]) +
851 sg_offset);
852 sg_count =
853 (size - sg_offset * 4) / sizeof(struct sg_simple_element);
854 if (sg_count > SG_TABLESIZE) {
855 printk(KERN_DEBUG "%s:IOCTL SG List too large (%u)\n",
856 c->name, sg_count);
857 rcode = -EINVAL;
858 goto cleanup;
859 }
860
861 for (i = 0; i < sg_count; i++) {
862 int sg_size;
863
864 if (!(sg[i].flag_count & 0x10000000
865 /*I2O_SGL_FLAGS_SIMPLE_ADDRESS_ELEMENT */ )) {
866 printk(KERN_DEBUG
867 "%s:Bad SG element %d - not simple (%x)\n",
868 c->name, i, sg[i].flag_count);
869 rcode = -EINVAL;
870 goto sg_list_cleanup;
871 }
872 sg_size = sg[i].flag_count & 0xffffff;
873 p = &(sg_list[sg_index]);
874 if (i2o_dma_alloc(&c->pdev->dev, p, sg_size)) {
875 /* Allocate memory for the transfer */
876 printk(KERN_DEBUG
877 "%s: Could not allocate SG buffer - size = %d buffer number %d of %d\n",
878 c->name, sg_size, i, sg_count);
879 rcode = -ENOMEM;
880 goto sg_list_cleanup;
881 }
882 sg_index++;
883 /* Copy in the user's SG buffer if necessary */
884 if (sg[i].
885 flag_count & 0x04000000 /*I2O_SGL_FLAGS_DIR */ ) {
886 // TODO 64bit fix
887 if (copy_from_user
888 (p->virt, (void __user *)sg[i].addr_bus,
889 sg_size)) {
890 printk(KERN_DEBUG
891 "%s: Could not copy SG buf %d FROM user\n",
892 c->name, i);
893 rcode = -EFAULT;
894 goto sg_list_cleanup;
895 }
896 }
897 sg[i].addr_bus = p->phys;
898 }
899 }
900
901 rcode = i2o_msg_post_wait(c, msg, 60);
902 msg = NULL;
903 if (rcode) {
904 reply[4] = ((u32) rcode) << 24;
905 goto sg_list_cleanup;
906 }
907
908 if (sg_offset) {
909 u32 rmsg[I2O_OUTBOUND_MSG_FRAME_SIZE];
910 /* Copy back the Scatter Gather buffers back to user space */
911 u32 j;
912 // TODO 64bit fix
913 struct sg_simple_element *sg;
914 int sg_size;
915
916 // re-acquire the original message to handle correctly the sg copy operation
917 memset(&rmsg, 0, I2O_OUTBOUND_MSG_FRAME_SIZE * 4);
918 // get user msg size in u32s
919 if (get_user(size, &user_msg[0])) {
920 rcode = -EFAULT;
921 goto sg_list_cleanup;
922 }
923 size = size >> 16;
924 size *= 4;
925 /* Copy in the user's I2O command */
926 if (copy_from_user(rmsg, user_msg, size)) {
927 rcode = -EFAULT;
928 goto sg_list_cleanup;
929 }
930 sg_count =
931 (size - sg_offset * 4) / sizeof(struct sg_simple_element);
932
933 // TODO 64bit fix
934 sg = (struct sg_simple_element *)(rmsg + sg_offset);
935 for (j = 0; j < sg_count; j++) {
936 /* Copy out the SG list to user's buffer if necessary */
937 if (!
938 (sg[j].
939 flag_count & 0x4000000 /*I2O_SGL_FLAGS_DIR */ )) {
940 sg_size = sg[j].flag_count & 0xffffff;
941 // TODO 64bit fix
942 if (copy_to_user
943 ((void __user *)sg[j].addr_bus, sg_list[j].virt,
944 sg_size)) {
945 printk(KERN_WARNING
946 "%s: Could not copy %p TO user %x\n",
947 c->name, sg_list[j].virt,
948 sg[j].addr_bus);
949 rcode = -EFAULT;
950 goto sg_list_cleanup;
951 }
952 }
953 }
954 }
955
956 sg_list_cleanup:
957 /* Copy back the reply to user space */
958 if (reply_size) {
959 // we wrote our own values for context - now restore the user supplied ones
960 if (copy_from_user(reply + 2, user_msg + 2, sizeof(u32) * 2)) {
961 printk(KERN_WARNING
962 "%s: Could not copy message context FROM user\n",
963 c->name);
964 rcode = -EFAULT;
965 }
966 if (copy_to_user(user_reply, reply, reply_size)) {
967 printk(KERN_WARNING
968 "%s: Could not copy reply TO user\n", c->name);
969 rcode = -EFAULT;
970 }
971 }
972
973 for (i = 0; i < sg_index; i++)
974 i2o_dma_free(&c->pdev->dev, &sg_list[i]);
975
976 cleanup:
977 kfree(reply);
978 out:
979 if (msg)
980 i2o_msg_nop(c, msg);
981 return rcode;
982 }
983 #endif
984
985 /*
986 * IOCTL Handler
987 */
988 static long i2o_cfg_ioctl(struct file *fp, unsigned int cmd, unsigned long arg)
989 {
990 int ret;
991
992 mutex_lock(&i2o_cfg_mutex);
993 switch (cmd) {
994 case I2OGETIOPS:
995 ret = i2o_cfg_getiops(arg);
996 break;
997
998 case I2OHRTGET:
999 ret = i2o_cfg_gethrt(arg);
1000 break;
1001
1002 case I2OLCTGET:
1003 ret = i2o_cfg_getlct(arg);
1004 break;
1005
1006 case I2OPARMSET:
1007 ret = i2o_cfg_parms(arg, I2OPARMSET);
1008 break;
1009
1010 case I2OPARMGET:
1011 ret = i2o_cfg_parms(arg, I2OPARMGET);
1012 break;
1013
1014 case I2OSWDL:
1015 ret = i2o_cfg_swdl(arg);
1016 break;
1017
1018 case I2OSWUL:
1019 ret = i2o_cfg_swul(arg);
1020 break;
1021
1022 case I2OSWDEL:
1023 ret = i2o_cfg_swdel(arg);
1024 break;
1025
1026 case I2OVALIDATE:
1027 ret = i2o_cfg_validate(arg);
1028 break;
1029
1030 case I2OEVTREG:
1031 ret = i2o_cfg_evt_reg(arg, fp);
1032 break;
1033
1034 case I2OEVTGET:
1035 ret = i2o_cfg_evt_get(arg, fp);
1036 break;
1037
1038 #ifdef CONFIG_I2O_EXT_ADAPTEC
1039 case I2OPASSTHRU:
1040 ret = i2o_cfg_passthru(arg);
1041 break;
1042 #endif
1043
1044 default:
1045 osm_debug("unknown ioctl called!\n");
1046 ret = -EINVAL;
1047 }
1048 mutex_unlock(&i2o_cfg_mutex);
1049 return ret;
1050 }
1051
1052 static int cfg_open(struct inode *inode, struct file *file)
1053 {
1054 struct i2o_cfg_info *tmp = kmalloc(sizeof(struct i2o_cfg_info),
1055 GFP_KERNEL);
1056 unsigned long flags;
1057
1058 if (!tmp)
1059 return -ENOMEM;
1060
1061 mutex_lock(&i2o_cfg_mutex);
1062 file->private_data = (void *)(i2o_cfg_info_id++);
1063 tmp->fp = file;
1064 tmp->fasync = NULL;
1065 tmp->q_id = (ulong) file->private_data;
1066 tmp->q_len = 0;
1067 tmp->q_in = 0;
1068 tmp->q_out = 0;
1069 tmp->q_lost = 0;
1070 tmp->next = open_files;
1071
1072 spin_lock_irqsave(&i2o_config_lock, flags);
1073 open_files = tmp;
1074 spin_unlock_irqrestore(&i2o_config_lock, flags);
1075 mutex_unlock(&i2o_cfg_mutex);
1076
1077 return 0;
1078 }
1079
1080 static int cfg_fasync(int fd, struct file *fp, int on)
1081 {
1082 ulong id = (ulong) fp->private_data;
1083 struct i2o_cfg_info *p;
1084 int ret = -EBADF;
1085
1086 mutex_lock(&i2o_cfg_mutex);
1087 for (p = open_files; p; p = p->next)
1088 if (p->q_id == id)
1089 break;
1090
1091 if (p)
1092 ret = fasync_helper(fd, fp, on, &p->fasync);
1093 mutex_unlock(&i2o_cfg_mutex);
1094 return ret;
1095 }
1096
1097 static int cfg_release(struct inode *inode, struct file *file)
1098 {
1099 ulong id = (ulong) file->private_data;
1100 struct i2o_cfg_info *p, **q;
1101 unsigned long flags;
1102
1103 mutex_lock(&i2o_cfg_mutex);
1104 spin_lock_irqsave(&i2o_config_lock, flags);
1105 for (q = &open_files; (p = *q) != NULL; q = &p->next) {
1106 if (p->q_id == id) {
1107 *q = p->next;
1108 kfree(p);
1109 break;
1110 }
1111 }
1112 spin_unlock_irqrestore(&i2o_config_lock, flags);
1113 mutex_unlock(&i2o_cfg_mutex);
1114
1115 return 0;
1116 }
1117
1118 static const struct file_operations config_fops = {
1119 .owner = THIS_MODULE,
1120 .llseek = no_llseek,
1121 .unlocked_ioctl = i2o_cfg_ioctl,
1122 #ifdef CONFIG_COMPAT
1123 .compat_ioctl = i2o_cfg_compat_ioctl,
1124 #endif
1125 .open = cfg_open,
1126 .release = cfg_release,
1127 .fasync = cfg_fasync,
1128 };
1129
1130 static struct miscdevice i2o_miscdev = {
1131 I2O_MINOR,
1132 "i2octl",
1133 &config_fops
1134 };
1135
1136 static int __init i2o_config_old_init(void)
1137 {
1138 spin_lock_init(&i2o_config_lock);
1139
1140 if (misc_register(&i2o_miscdev) < 0) {
1141 osm_err("can't register device.\n");
1142 return -EBUSY;
1143 }
1144
1145 return 0;
1146 }
1147
1148 static void i2o_config_old_exit(void)
1149 {
1150 misc_deregister(&i2o_miscdev);
1151 }
1152
1153 MODULE_AUTHOR("Red Hat Software");
Linux ARM platform port for MOXA ART SoC