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