tjh.dev
Linux kernel mirror (for testing)
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linux
1/*
2 * Copyright 2004 The Unichrome Project. All Rights Reserved.
3 * Copyright 2005 Thomas Hellstrom. All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sub license,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the
13 * next paragraph) shall be included in all copies or substantial portions
14 * of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHOR(S), AND/OR THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
23 *
24 * Author: Thomas Hellstrom 2004, 2005.
25 * This code was written using docs obtained under NDA from VIA Inc.
26 *
27 * Don't run this code directly on an AGP buffer. Due to cache problems it will
28 * be very slow.
29 */
30
31#include "via_3d_reg.h"
32#include "drmP.h"
33#include "drm.h"
34#include "via_drm.h"
35#include "via_verifier.h"
36#include "via_drv.h"
37
38typedef enum {
39 state_command,
40 state_header2,
41 state_header1,
42 state_vheader5,
43 state_vheader6,
44 state_error
45} verifier_state_t;
46
47typedef enum {
48 no_check = 0,
49 check_for_header2,
50 check_for_header1,
51 check_for_header2_err,
52 check_for_header1_err,
53 check_for_fire,
54 check_z_buffer_addr0,
55 check_z_buffer_addr1,
56 check_z_buffer_addr_mode,
57 check_destination_addr0,
58 check_destination_addr1,
59 check_destination_addr_mode,
60 check_for_dummy,
61 check_for_dd,
62 check_texture_addr0,
63 check_texture_addr1,
64 check_texture_addr2,
65 check_texture_addr3,
66 check_texture_addr4,
67 check_texture_addr5,
68 check_texture_addr6,
69 check_texture_addr7,
70 check_texture_addr8,
71 check_texture_addr_mode,
72 check_for_vertex_count,
73 check_number_texunits,
74 forbidden_command
75} hazard_t;
76
77/*
78 * Associates each hazard above with a possible multi-command
79 * sequence. For example an address that is split over multiple
80 * commands and that needs to be checked at the first command
81 * that does not include any part of the address.
82 */
83
84static drm_via_sequence_t seqs[] = {
85 no_sequence,
86 no_sequence,
87 no_sequence,
88 no_sequence,
89 no_sequence,
90 no_sequence,
91 z_address,
92 z_address,
93 z_address,
94 dest_address,
95 dest_address,
96 dest_address,
97 no_sequence,
98 no_sequence,
99 tex_address,
100 tex_address,
101 tex_address,
102 tex_address,
103 tex_address,
104 tex_address,
105 tex_address,
106 tex_address,
107 tex_address,
108 tex_address,
109 no_sequence
110};
111
112typedef struct {
113 unsigned int code;
114 hazard_t hz;
115} hz_init_t;
116
117static hz_init_t init_table1[] = {
118 {0xf2, check_for_header2_err},
119 {0xf0, check_for_header1_err},
120 {0xee, check_for_fire},
121 {0xcc, check_for_dummy},
122 {0xdd, check_for_dd},
123 {0x00, no_check},
124 {0x10, check_z_buffer_addr0},
125 {0x11, check_z_buffer_addr1},
126 {0x12, check_z_buffer_addr_mode},
127 {0x13, no_check},
128 {0x14, no_check},
129 {0x15, no_check},
130 {0x23, no_check},
131 {0x24, no_check},
132 {0x33, no_check},
133 {0x34, no_check},
134 {0x35, no_check},
135 {0x36, no_check},
136 {0x37, no_check},
137 {0x38, no_check},
138 {0x39, no_check},
139 {0x3A, no_check},
140 {0x3B, no_check},
141 {0x3C, no_check},
142 {0x3D, no_check},
143 {0x3E, no_check},
144 {0x40, check_destination_addr0},
145 {0x41, check_destination_addr1},
146 {0x42, check_destination_addr_mode},
147 {0x43, no_check},
148 {0x44, no_check},
149 {0x50, no_check},
150 {0x51, no_check},
151 {0x52, no_check},
152 {0x53, no_check},
153 {0x54, no_check},
154 {0x55, no_check},
155 {0x56, no_check},
156 {0x57, no_check},
157 {0x58, no_check},
158 {0x70, no_check},
159 {0x71, no_check},
160 {0x78, no_check},
161 {0x79, no_check},
162 {0x7A, no_check},
163 {0x7B, no_check},
164 {0x7C, no_check},
165 {0x7D, check_for_vertex_count}
166};
167
168static hz_init_t init_table2[] = {
169 {0xf2, check_for_header2_err},
170 {0xf0, check_for_header1_err},
171 {0xee, check_for_fire},
172 {0xcc, check_for_dummy},
173 {0x00, check_texture_addr0},
174 {0x01, check_texture_addr0},
175 {0x02, check_texture_addr0},
176 {0x03, check_texture_addr0},
177 {0x04, check_texture_addr0},
178 {0x05, check_texture_addr0},
179 {0x06, check_texture_addr0},
180 {0x07, check_texture_addr0},
181 {0x08, check_texture_addr0},
182 {0x09, check_texture_addr0},
183 {0x20, check_texture_addr1},
184 {0x21, check_texture_addr1},
185 {0x22, check_texture_addr1},
186 {0x23, check_texture_addr4},
187 {0x2B, check_texture_addr3},
188 {0x2C, check_texture_addr3},
189 {0x2D, check_texture_addr3},
190 {0x2E, check_texture_addr3},
191 {0x2F, check_texture_addr3},
192 {0x30, check_texture_addr3},
193 {0x31, check_texture_addr3},
194 {0x32, check_texture_addr3},
195 {0x33, check_texture_addr3},
196 {0x34, check_texture_addr3},
197 {0x4B, check_texture_addr5},
198 {0x4C, check_texture_addr6},
199 {0x51, check_texture_addr7},
200 {0x52, check_texture_addr8},
201 {0x77, check_texture_addr2},
202 {0x78, no_check},
203 {0x79, no_check},
204 {0x7A, no_check},
205 {0x7B, check_texture_addr_mode},
206 {0x7C, no_check},
207 {0x7D, no_check},
208 {0x7E, no_check},
209 {0x7F, no_check},
210 {0x80, no_check},
211 {0x81, no_check},
212 {0x82, no_check},
213 {0x83, no_check},
214 {0x85, no_check},
215 {0x86, no_check},
216 {0x87, no_check},
217 {0x88, no_check},
218 {0x89, no_check},
219 {0x8A, no_check},
220 {0x90, no_check},
221 {0x91, no_check},
222 {0x92, no_check},
223 {0x93, no_check}
224};
225
226static hz_init_t init_table3[] = {
227 {0xf2, check_for_header2_err},
228 {0xf0, check_for_header1_err},
229 {0xcc, check_for_dummy},
230 {0x00, check_number_texunits}
231};
232
233static hazard_t table1[256];
234static hazard_t table2[256];
235static hazard_t table3[256];
236
237static __inline__ int
238eat_words(const uint32_t ** buf, const uint32_t * buf_end, unsigned num_words)
239{
240 if ((buf_end - *buf) >= num_words) {
241 *buf += num_words;
242 return 0;
243 }
244 DRM_ERROR("Illegal termination of DMA command buffer\n");
245 return 1;
246}
247
248/*
249 * Partially stolen from drm_memory.h
250 */
251
252static __inline__ drm_local_map_t *via_drm_lookup_agp_map(drm_via_state_t *seq,
253 unsigned long offset,
254 unsigned long size,
255 struct drm_device * dev)
256{
257 struct drm_map_list *r_list;
258 drm_local_map_t *map = seq->map_cache;
259
260 if (map && map->offset <= offset
261 && (offset + size) <= (map->offset + map->size)) {
262 return map;
263 }
264
265 list_for_each_entry(r_list, &dev->maplist, head) {
266 map = r_list->map;
267 if (!map)
268 continue;
269 if (map->offset <= offset
270 && (offset + size) <= (map->offset + map->size)
271 && !(map->flags & _DRM_RESTRICTED)
272 && (map->type == _DRM_AGP)) {
273 seq->map_cache = map;
274 return map;
275 }
276 }
277 return NULL;
278}
279
280/*
281 * Require that all AGP texture levels reside in the same AGP map which should
282 * be mappable by the client. This is not a big restriction.
283 * FIXME: To actually enforce this security policy strictly, drm_rmmap
284 * would have to wait for dma quiescent before removing an AGP map.
285 * The via_drm_lookup_agp_map call in reality seems to take
286 * very little CPU time.
287 */
288
289static __inline__ int finish_current_sequence(drm_via_state_t * cur_seq)
290{
291 switch (cur_seq->unfinished) {
292 case z_address:
293 DRM_DEBUG("Z Buffer start address is 0x%x\n", cur_seq->z_addr);
294 break;
295 case dest_address:
296 DRM_DEBUG("Destination start address is 0x%x\n",
297 cur_seq->d_addr);
298 break;
299 case tex_address:
300 if (cur_seq->agp_texture) {
301 unsigned start =
302 cur_seq->tex_level_lo[cur_seq->texture];
303 unsigned end = cur_seq->tex_level_hi[cur_seq->texture];
304 unsigned long lo = ~0, hi = 0, tmp;
305 uint32_t *addr, *pitch, *height, tex;
306 unsigned i;
307 int npot;
308
309 if (end > 9)
310 end = 9;
311 if (start > 9)
312 start = 9;
313
314 addr =
315 &(cur_seq->t_addr[tex = cur_seq->texture][start]);
316 pitch = &(cur_seq->pitch[tex][start]);
317 height = &(cur_seq->height[tex][start]);
318 npot = cur_seq->tex_npot[tex];
319 for (i = start; i <= end; ++i) {
320 tmp = *addr++;
321 if (tmp < lo)
322 lo = tmp;
323 if (i == 0 && npot)
324 tmp += (*height++ * *pitch++);
325 else
326 tmp += (*height++ << *pitch++);
327 if (tmp > hi)
328 hi = tmp;
329 }
330
331 if (!via_drm_lookup_agp_map
332 (cur_seq, lo, hi - lo, cur_seq->dev)) {
333 DRM_ERROR
334 ("AGP texture is not in allowed map\n");
335 return 2;
336 }
337 }
338 break;
339 default:
340 break;
341 }
342 cur_seq->unfinished = no_sequence;
343 return 0;
344}
345
346static __inline__ int
347investigate_hazard(uint32_t cmd, hazard_t hz, drm_via_state_t * cur_seq)
348{
349 register uint32_t tmp, *tmp_addr;
350
351 if (cur_seq->unfinished && (cur_seq->unfinished != seqs[hz])) {
352 int ret;
353 if ((ret = finish_current_sequence(cur_seq)))
354 return ret;
355 }
356
357 switch (hz) {
358 case check_for_header2:
359 if (cmd == HALCYON_HEADER2)
360 return 1;
361 return 0;
362 case check_for_header1:
363 if ((cmd & HALCYON_HEADER1MASK) == HALCYON_HEADER1)
364 return 1;
365 return 0;
366 case check_for_header2_err:
367 if (cmd == HALCYON_HEADER2)
368 return 1;
369 DRM_ERROR("Illegal DMA HALCYON_HEADER2 command\n");
370 break;
371 case check_for_header1_err:
372 if ((cmd & HALCYON_HEADER1MASK) == HALCYON_HEADER1)
373 return 1;
374 DRM_ERROR("Illegal DMA HALCYON_HEADER1 command\n");
375 break;
376 case check_for_fire:
377 if ((cmd & HALCYON_FIREMASK) == HALCYON_FIRECMD)
378 return 1;
379 DRM_ERROR("Illegal DMA HALCYON_FIRECMD command\n");
380 break;
381 case check_for_dummy:
382 if (HC_DUMMY == cmd)
383 return 0;
384 DRM_ERROR("Illegal DMA HC_DUMMY command\n");
385 break;
386 case check_for_dd:
387 if (0xdddddddd == cmd)
388 return 0;
389 DRM_ERROR("Illegal DMA 0xdddddddd command\n");
390 break;
391 case check_z_buffer_addr0:
392 cur_seq->unfinished = z_address;
393 cur_seq->z_addr = (cur_seq->z_addr & 0xFF000000) |
394 (cmd & 0x00FFFFFF);
395 return 0;
396 case check_z_buffer_addr1:
397 cur_seq->unfinished = z_address;
398 cur_seq->z_addr = (cur_seq->z_addr & 0x00FFFFFF) |
399 ((cmd & 0xFF) << 24);
400 return 0;
401 case check_z_buffer_addr_mode:
402 cur_seq->unfinished = z_address;
403 if ((cmd & 0x0000C000) == 0)
404 return 0;
405 DRM_ERROR("Attempt to place Z buffer in system memory\n");
406 return 2;
407 case check_destination_addr0:
408 cur_seq->unfinished = dest_address;
409 cur_seq->d_addr = (cur_seq->d_addr & 0xFF000000) |
410 (cmd & 0x00FFFFFF);
411 return 0;
412 case check_destination_addr1:
413 cur_seq->unfinished = dest_address;
414 cur_seq->d_addr = (cur_seq->d_addr & 0x00FFFFFF) |
415 ((cmd & 0xFF) << 24);
416 return 0;
417 case check_destination_addr_mode:
418 cur_seq->unfinished = dest_address;
419 if ((cmd & 0x0000C000) == 0)
420 return 0;
421 DRM_ERROR
422 ("Attempt to place 3D drawing buffer in system memory\n");
423 return 2;
424 case check_texture_addr0:
425 cur_seq->unfinished = tex_address;
426 tmp = (cmd >> 24);
427 tmp_addr = &cur_seq->t_addr[cur_seq->texture][tmp];
428 *tmp_addr = (*tmp_addr & 0xFF000000) | (cmd & 0x00FFFFFF);
429 return 0;
430 case check_texture_addr1:
431 cur_seq->unfinished = tex_address;
432 tmp = ((cmd >> 24) - 0x20);
433 tmp += tmp << 1;
434 tmp_addr = &cur_seq->t_addr[cur_seq->texture][tmp];
435 *tmp_addr = (*tmp_addr & 0x00FFFFFF) | ((cmd & 0xFF) << 24);
436 tmp_addr++;
437 *tmp_addr = (*tmp_addr & 0x00FFFFFF) | ((cmd & 0xFF00) << 16);
438 tmp_addr++;
439 *tmp_addr = (*tmp_addr & 0x00FFFFFF) | ((cmd & 0xFF0000) << 8);
440 return 0;
441 case check_texture_addr2:
442 cur_seq->unfinished = tex_address;
443 cur_seq->tex_level_lo[tmp = cur_seq->texture] = cmd & 0x3F;
444 cur_seq->tex_level_hi[tmp] = (cmd & 0xFC0) >> 6;
445 return 0;
446 case check_texture_addr3:
447 cur_seq->unfinished = tex_address;
448 tmp = ((cmd >> 24) - HC_SubA_HTXnL0Pit);
449 if (tmp == 0 &&
450 (cmd & HC_HTXnEnPit_MASK)) {
451 cur_seq->pitch[cur_seq->texture][tmp] =
452 (cmd & HC_HTXnLnPit_MASK);
453 cur_seq->tex_npot[cur_seq->texture] = 1;
454 } else {
455 cur_seq->pitch[cur_seq->texture][tmp] =
456 (cmd & HC_HTXnLnPitE_MASK) >> HC_HTXnLnPitE_SHIFT;
457 cur_seq->tex_npot[cur_seq->texture] = 0;
458 if (cmd & 0x000FFFFF) {
459 DRM_ERROR
460 ("Unimplemented texture level 0 pitch mode.\n");
461 return 2;
462 }
463 }
464 return 0;
465 case check_texture_addr4:
466 cur_seq->unfinished = tex_address;
467 tmp_addr = &cur_seq->t_addr[cur_seq->texture][9];
468 *tmp_addr = (*tmp_addr & 0x00FFFFFF) | ((cmd & 0xFF) << 24);
469 return 0;
470 case check_texture_addr5:
471 case check_texture_addr6:
472 cur_seq->unfinished = tex_address;
473 /*
474 * Texture width. We don't care since we have the pitch.
475 */
476 return 0;
477 case check_texture_addr7:
478 cur_seq->unfinished = tex_address;
479 tmp_addr = &(cur_seq->height[cur_seq->texture][0]);
480 tmp_addr[5] = 1 << ((cmd & 0x00F00000) >> 20);
481 tmp_addr[4] = 1 << ((cmd & 0x000F0000) >> 16);
482 tmp_addr[3] = 1 << ((cmd & 0x0000F000) >> 12);
483 tmp_addr[2] = 1 << ((cmd & 0x00000F00) >> 8);
484 tmp_addr[1] = 1 << ((cmd & 0x000000F0) >> 4);
485 tmp_addr[0] = 1 << (cmd & 0x0000000F);
486 return 0;
487 case check_texture_addr8:
488 cur_seq->unfinished = tex_address;
489 tmp_addr = &(cur_seq->height[cur_seq->texture][0]);
490 tmp_addr[9] = 1 << ((cmd & 0x0000F000) >> 12);
491 tmp_addr[8] = 1 << ((cmd & 0x00000F00) >> 8);
492 tmp_addr[7] = 1 << ((cmd & 0x000000F0) >> 4);
493 tmp_addr[6] = 1 << (cmd & 0x0000000F);
494 return 0;
495 case check_texture_addr_mode:
496 cur_seq->unfinished = tex_address;
497 if (2 == (tmp = cmd & 0x00000003)) {
498 DRM_ERROR
499 ("Attempt to fetch texture from system memory.\n");
500 return 2;
501 }
502 cur_seq->agp_texture = (tmp == 3);
503 cur_seq->tex_palette_size[cur_seq->texture] =
504 (cmd >> 16) & 0x000000007;
505 return 0;
506 case check_for_vertex_count:
507 cur_seq->vertex_count = cmd & 0x0000FFFF;
508 return 0;
509 case check_number_texunits:
510 cur_seq->multitex = (cmd >> 3) & 1;
511 return 0;
512 default:
513 DRM_ERROR("Illegal DMA data: 0x%x\n", cmd);
514 return 2;
515 }
516 return 2;
517}
518
519static __inline__ int
520via_check_prim_list(uint32_t const **buffer, const uint32_t * buf_end,
521 drm_via_state_t * cur_seq)
522{
523 drm_via_private_t *dev_priv =
524 (drm_via_private_t *) cur_seq->dev->dev_private;
525 uint32_t a_fire, bcmd, dw_count;
526 int ret = 0;
527 int have_fire;
528 const uint32_t *buf = *buffer;
529
530 while (buf < buf_end) {
531 have_fire = 0;
532 if ((buf_end - buf) < 2) {
533 DRM_ERROR
534 ("Unexpected termination of primitive list.\n");
535 ret = 1;
536 break;
537 }
538 if ((*buf & HC_ACMD_MASK) != HC_ACMD_HCmdB)
539 break;
540 bcmd = *buf++;
541 if ((*buf & HC_ACMD_MASK) != HC_ACMD_HCmdA) {
542 DRM_ERROR("Expected Vertex List A command, got 0x%x\n",
543 *buf);
544 ret = 1;
545 break;
546 }
547 a_fire =
548 *buf++ | HC_HPLEND_MASK | HC_HPMValidN_MASK |
549 HC_HE3Fire_MASK;
550
551 /*
552 * How many dwords per vertex ?
553 */
554
555 if (cur_seq->agp && ((bcmd & (0xF << 11)) == 0)) {
556 DRM_ERROR("Illegal B command vertex data for AGP.\n");
557 ret = 1;
558 break;
559 }
560
561 dw_count = 0;
562 if (bcmd & (1 << 7))
563 dw_count += (cur_seq->multitex) ? 2 : 1;
564 if (bcmd & (1 << 8))
565 dw_count += (cur_seq->multitex) ? 2 : 1;
566 if (bcmd & (1 << 9))
567 dw_count++;
568 if (bcmd & (1 << 10))
569 dw_count++;
570 if (bcmd & (1 << 11))
571 dw_count++;
572 if (bcmd & (1 << 12))
573 dw_count++;
574 if (bcmd & (1 << 13))
575 dw_count++;
576 if (bcmd & (1 << 14))
577 dw_count++;
578
579 while (buf < buf_end) {
580 if (*buf == a_fire) {
581 if (dev_priv->num_fire_offsets >=
582 VIA_FIRE_BUF_SIZE) {
583 DRM_ERROR("Fire offset buffer full.\n");
584 ret = 1;
585 break;
586 }
587 dev_priv->fire_offsets[dev_priv->
588 num_fire_offsets++] =
589 buf;
590 have_fire = 1;
591 buf++;
592 if (buf < buf_end && *buf == a_fire)
593 buf++;
594 break;
595 }
596 if ((*buf == HALCYON_HEADER2) ||
597 ((*buf & HALCYON_FIREMASK) == HALCYON_FIRECMD)) {
598 DRM_ERROR("Missing Vertex Fire command, "
599 "Stray Vertex Fire command or verifier "
600 "lost sync.\n");
601 ret = 1;
602 break;
603 }
604 if ((ret = eat_words(&buf, buf_end, dw_count)))
605 break;
606 }
607 if (buf >= buf_end && !have_fire) {
608 DRM_ERROR("Missing Vertex Fire command or verifier "
609 "lost sync.\n");
610 ret = 1;
611 break;
612 }
613 if (cur_seq->agp && ((buf - cur_seq->buf_start) & 0x01)) {
614 DRM_ERROR("AGP Primitive list end misaligned.\n");
615 ret = 1;
616 break;
617 }
618 }
619 *buffer = buf;
620 return ret;
621}
622
623static __inline__ verifier_state_t
624via_check_header2(uint32_t const **buffer, const uint32_t * buf_end,
625 drm_via_state_t * hc_state)
626{
627 uint32_t cmd;
628 int hz_mode;
629 hazard_t hz;
630 const uint32_t *buf = *buffer;
631 const hazard_t *hz_table;
632
633 if ((buf_end - buf) < 2) {
634 DRM_ERROR
635 ("Illegal termination of DMA HALCYON_HEADER2 sequence.\n");
636 return state_error;
637 }
638 buf++;
639 cmd = (*buf++ & 0xFFFF0000) >> 16;
640
641 switch (cmd) {
642 case HC_ParaType_CmdVdata:
643 if (via_check_prim_list(&buf, buf_end, hc_state))
644 return state_error;
645 *buffer = buf;
646 return state_command;
647 case HC_ParaType_NotTex:
648 hz_table = table1;
649 break;
650 case HC_ParaType_Tex:
651 hc_state->texture = 0;
652 hz_table = table2;
653 break;
654 case (HC_ParaType_Tex | (HC_SubType_Tex1 << 8)):
655 hc_state->texture = 1;
656 hz_table = table2;
657 break;
658 case (HC_ParaType_Tex | (HC_SubType_TexGeneral << 8)):
659 hz_table = table3;
660 break;
661 case HC_ParaType_Auto:
662 if (eat_words(&buf, buf_end, 2))
663 return state_error;
664 *buffer = buf;
665 return state_command;
666 case (HC_ParaType_Palette | (HC_SubType_Stipple << 8)):
667 if (eat_words(&buf, buf_end, 32))
668 return state_error;
669 *buffer = buf;
670 return state_command;
671 case (HC_ParaType_Palette | (HC_SubType_TexPalette0 << 8)):
672 case (HC_ParaType_Palette | (HC_SubType_TexPalette1 << 8)):
673 DRM_ERROR("Texture palettes are rejected because of "
674 "lack of info how to determine their size.\n");
675 return state_error;
676 case (HC_ParaType_Palette | (HC_SubType_FogTable << 8)):
677 DRM_ERROR("Fog factor palettes are rejected because of "
678 "lack of info how to determine their size.\n");
679 return state_error;
680 default:
681
682 /*
683 * There are some unimplemented HC_ParaTypes here, that
684 * need to be implemented if the Mesa driver is extended.
685 */
686
687 DRM_ERROR("Invalid or unimplemented HALCYON_HEADER2 "
688 "DMA subcommand: 0x%x. Previous dword: 0x%x\n",
689 cmd, *(buf - 2));
690 *buffer = buf;
691 return state_error;
692 }
693
694 while (buf < buf_end) {
695 cmd = *buf++;
696 if ((hz = hz_table[cmd >> 24])) {
697 if ((hz_mode = investigate_hazard(cmd, hz, hc_state))) {
698 if (hz_mode == 1) {
699 buf--;
700 break;
701 }
702 return state_error;
703 }
704 } else if (hc_state->unfinished &&
705 finish_current_sequence(hc_state)) {
706 return state_error;
707 }
708 }
709 if (hc_state->unfinished && finish_current_sequence(hc_state)) {
710 return state_error;
711 }
712 *buffer = buf;
713 return state_command;
714}
715
716static __inline__ verifier_state_t
717via_parse_header2(drm_via_private_t * dev_priv, uint32_t const **buffer,
718 const uint32_t * buf_end, int *fire_count)
719{
720 uint32_t cmd;
721 const uint32_t *buf = *buffer;
722 const uint32_t *next_fire;
723 int burst = 0;
724
725 next_fire = dev_priv->fire_offsets[*fire_count];
726 buf++;
727 cmd = (*buf & 0xFFFF0000) >> 16;
728 VIA_WRITE(HC_REG_TRANS_SET + HC_REG_BASE, *buf++);
729 switch (cmd) {
730 case HC_ParaType_CmdVdata:
731 while ((buf < buf_end) &&
732 (*fire_count < dev_priv->num_fire_offsets) &&
733 (*buf & HC_ACMD_MASK) == HC_ACMD_HCmdB) {
734 while (buf <= next_fire) {
735 VIA_WRITE(HC_REG_TRANS_SPACE + HC_REG_BASE +
736 (burst & 63), *buf++);
737 burst += 4;
738 }
739 if ((buf < buf_end)
740 && ((*buf & HALCYON_FIREMASK) == HALCYON_FIRECMD))
741 buf++;
742
743 if (++(*fire_count) < dev_priv->num_fire_offsets)
744 next_fire = dev_priv->fire_offsets[*fire_count];
745 }
746 break;
747 default:
748 while (buf < buf_end) {
749
750 if (*buf == HC_HEADER2 ||
751 (*buf & HALCYON_HEADER1MASK) == HALCYON_HEADER1 ||
752 (*buf & VIA_VIDEOMASK) == VIA_VIDEO_HEADER5 ||
753 (*buf & VIA_VIDEOMASK) == VIA_VIDEO_HEADER6)
754 break;
755
756 VIA_WRITE(HC_REG_TRANS_SPACE + HC_REG_BASE +
757 (burst & 63), *buf++);
758 burst += 4;
759 }
760 }
761 *buffer = buf;
762 return state_command;
763}
764
765static __inline__ int verify_mmio_address(uint32_t address)
766{
767 if ((address > 0x3FF) && (address < 0xC00)) {
768 DRM_ERROR("Invalid VIDEO DMA command. "
769 "Attempt to access 3D- or command burst area.\n");
770 return 1;
771 } else if ((address > 0xCFF) && (address < 0x1300)) {
772 DRM_ERROR("Invalid VIDEO DMA command. "
773 "Attempt to access PCI DMA area.\n");
774 return 1;
775 } else if (address > 0x13FF) {
776 DRM_ERROR("Invalid VIDEO DMA command. "
777 "Attempt to access VGA registers.\n");
778 return 1;
779 }
780 return 0;
781}
782
783static __inline__ int
784verify_video_tail(uint32_t const **buffer, const uint32_t * buf_end,
785 uint32_t dwords)
786{
787 const uint32_t *buf = *buffer;
788
789 if (buf_end - buf < dwords) {
790 DRM_ERROR("Illegal termination of video command.\n");
791 return 1;
792 }
793 while (dwords--) {
794 if (*buf++) {
795 DRM_ERROR("Illegal video command tail.\n");
796 return 1;
797 }
798 }
799 *buffer = buf;
800 return 0;
801}
802
803static __inline__ verifier_state_t
804via_check_header1(uint32_t const **buffer, const uint32_t * buf_end)
805{
806 uint32_t cmd;
807 const uint32_t *buf = *buffer;
808 verifier_state_t ret = state_command;
809
810 while (buf < buf_end) {
811 cmd = *buf;
812 if ((cmd > ((0x3FF >> 2) | HALCYON_HEADER1)) &&
813 (cmd < ((0xC00 >> 2) | HALCYON_HEADER1))) {
814 if ((cmd & HALCYON_HEADER1MASK) != HALCYON_HEADER1)
815 break;
816 DRM_ERROR("Invalid HALCYON_HEADER1 command. "
817 "Attempt to access 3D- or command burst area.\n");
818 ret = state_error;
819 break;
820 } else if (cmd > ((0xCFF >> 2) | HALCYON_HEADER1)) {
821 if ((cmd & HALCYON_HEADER1MASK) != HALCYON_HEADER1)
822 break;
823 DRM_ERROR("Invalid HALCYON_HEADER1 command. "
824 "Attempt to access VGA registers.\n");
825 ret = state_error;
826 break;
827 } else {
828 buf += 2;
829 }
830 }
831 *buffer = buf;
832 return ret;
833}
834
835static __inline__ verifier_state_t
836via_parse_header1(drm_via_private_t * dev_priv, uint32_t const **buffer,
837 const uint32_t * buf_end)
838{
839 register uint32_t cmd;
840 const uint32_t *buf = *buffer;
841
842 while (buf < buf_end) {
843 cmd = *buf;
844 if ((cmd & HALCYON_HEADER1MASK) != HALCYON_HEADER1)
845 break;
846 VIA_WRITE((cmd & ~HALCYON_HEADER1MASK) << 2, *++buf);
847 buf++;
848 }
849 *buffer = buf;
850 return state_command;
851}
852
853static __inline__ verifier_state_t
854via_check_vheader5(uint32_t const **buffer, const uint32_t * buf_end)
855{
856 uint32_t data;
857 const uint32_t *buf = *buffer;
858
859 if (buf_end - buf < 4) {
860 DRM_ERROR("Illegal termination of video header5 command\n");
861 return state_error;
862 }
863
864 data = *buf++ & ~VIA_VIDEOMASK;
865 if (verify_mmio_address(data))
866 return state_error;
867
868 data = *buf++;
869 if (*buf++ != 0x00F50000) {
870 DRM_ERROR("Illegal header5 header data\n");
871 return state_error;
872 }
873 if (*buf++ != 0x00000000) {
874 DRM_ERROR("Illegal header5 header data\n");
875 return state_error;
876 }
877 if (eat_words(&buf, buf_end, data))
878 return state_error;
879 if ((data & 3) && verify_video_tail(&buf, buf_end, 4 - (data & 3)))
880 return state_error;
881 *buffer = buf;
882 return state_command;
883
884}
885
886static __inline__ verifier_state_t
887via_parse_vheader5(drm_via_private_t * dev_priv, uint32_t const **buffer,
888 const uint32_t * buf_end)
889{
890 uint32_t addr, count, i;
891 const uint32_t *buf = *buffer;
892
893 addr = *buf++ & ~VIA_VIDEOMASK;
894 i = count = *buf;
895 buf += 3;
896 while (i--) {
897 VIA_WRITE(addr, *buf++);
898 }
899 if (count & 3)
900 buf += 4 - (count & 3);
901 *buffer = buf;
902 return state_command;
903}
904
905static __inline__ verifier_state_t
906via_check_vheader6(uint32_t const **buffer, const uint32_t * buf_end)
907{
908 uint32_t data;
909 const uint32_t *buf = *buffer;
910 uint32_t i;
911
912 if (buf_end - buf < 4) {
913 DRM_ERROR("Illegal termination of video header6 command\n");
914 return state_error;
915 }
916 buf++;
917 data = *buf++;
918 if (*buf++ != 0x00F60000) {
919 DRM_ERROR("Illegal header6 header data\n");
920 return state_error;
921 }
922 if (*buf++ != 0x00000000) {
923 DRM_ERROR("Illegal header6 header data\n");
924 return state_error;
925 }
926 if ((buf_end - buf) < (data << 1)) {
927 DRM_ERROR("Illegal termination of video header6 command\n");
928 return state_error;
929 }
930 for (i = 0; i < data; ++i) {
931 if (verify_mmio_address(*buf++))
932 return state_error;
933 buf++;
934 }
935 data <<= 1;
936 if ((data & 3) && verify_video_tail(&buf, buf_end, 4 - (data & 3)))
937 return state_error;
938 *buffer = buf;
939 return state_command;
940}
941
942static __inline__ verifier_state_t
943via_parse_vheader6(drm_via_private_t * dev_priv, uint32_t const **buffer,
944 const uint32_t * buf_end)
945{
946
947 uint32_t addr, count, i;
948 const uint32_t *buf = *buffer;
949
950 i = count = *++buf;
951 buf += 3;
952 while (i--) {
953 addr = *buf++;
954 VIA_WRITE(addr, *buf++);
955 }
956 count <<= 1;
957 if (count & 3)
958 buf += 4 - (count & 3);
959 *buffer = buf;
960 return state_command;
961}
962
963int
964via_verify_command_stream(const uint32_t * buf, unsigned int size,
965 struct drm_device * dev, int agp)
966{
967
968 drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
969 drm_via_state_t *hc_state = &dev_priv->hc_state;
970 drm_via_state_t saved_state = *hc_state;
971 uint32_t cmd;
972 const uint32_t *buf_end = buf + (size >> 2);
973 verifier_state_t state = state_command;
974 int cme_video;
975 int supported_3d;
976
977 cme_video = (dev_priv->chipset == VIA_PRO_GROUP_A ||
978 dev_priv->chipset == VIA_DX9_0);
979
980 supported_3d = dev_priv->chipset != VIA_DX9_0;
981
982 hc_state->dev = dev;
983 hc_state->unfinished = no_sequence;
984 hc_state->map_cache = NULL;
985 hc_state->agp = agp;
986 hc_state->buf_start = buf;
987 dev_priv->num_fire_offsets = 0;
988
989 while (buf < buf_end) {
990
991 switch (state) {
992 case state_header2:
993 state = via_check_header2(&buf, buf_end, hc_state);
994 break;
995 case state_header1:
996 state = via_check_header1(&buf, buf_end);
997 break;
998 case state_vheader5:
999 state = via_check_vheader5(&buf, buf_end);
1000 break;
1001 case state_vheader6:
1002 state = via_check_vheader6(&buf, buf_end);
1003 break;
1004 case state_command:
1005 if ((HALCYON_HEADER2 == (cmd = *buf)) &&
1006 supported_3d)
1007 state = state_header2;
1008 else if ((cmd & HALCYON_HEADER1MASK) == HALCYON_HEADER1)
1009 state = state_header1;
1010 else if (cme_video
1011 && (cmd & VIA_VIDEOMASK) == VIA_VIDEO_HEADER5)
1012 state = state_vheader5;
1013 else if (cme_video
1014 && (cmd & VIA_VIDEOMASK) == VIA_VIDEO_HEADER6)
1015 state = state_vheader6;
1016 else if ((cmd == HALCYON_HEADER2) && !supported_3d) {
1017 DRM_ERROR("Accelerated 3D is not supported on this chipset yet.\n");
1018 state = state_error;
1019 } else {
1020 DRM_ERROR
1021 ("Invalid / Unimplemented DMA HEADER command. 0x%x\n",
1022 cmd);
1023 state = state_error;
1024 }
1025 break;
1026 case state_error:
1027 default:
1028 *hc_state = saved_state;
1029 return -EINVAL;
1030 }
1031 }
1032 if (state == state_error) {
1033 *hc_state = saved_state;
1034 return -EINVAL;
1035 }
1036 return 0;
1037}
1038
1039int
1040via_parse_command_stream(struct drm_device * dev, const uint32_t * buf,
1041 unsigned int size)
1042{
1043
1044 drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
1045 uint32_t cmd;
1046 const uint32_t *buf_end = buf + (size >> 2);
1047 verifier_state_t state = state_command;
1048 int fire_count = 0;
1049
1050 while (buf < buf_end) {
1051
1052 switch (state) {
1053 case state_header2:
1054 state =
1055 via_parse_header2(dev_priv, &buf, buf_end,
1056 &fire_count);
1057 break;
1058 case state_header1:
1059 state = via_parse_header1(dev_priv, &buf, buf_end);
1060 break;
1061 case state_vheader5:
1062 state = via_parse_vheader5(dev_priv, &buf, buf_end);
1063 break;
1064 case state_vheader6:
1065 state = via_parse_vheader6(dev_priv, &buf, buf_end);
1066 break;
1067 case state_command:
1068 if (HALCYON_HEADER2 == (cmd = *buf))
1069 state = state_header2;
1070 else if ((cmd & HALCYON_HEADER1MASK) == HALCYON_HEADER1)
1071 state = state_header1;
1072 else if ((cmd & VIA_VIDEOMASK) == VIA_VIDEO_HEADER5)
1073 state = state_vheader5;
1074 else if ((cmd & VIA_VIDEOMASK) == VIA_VIDEO_HEADER6)
1075 state = state_vheader6;
1076 else {
1077 DRM_ERROR
1078 ("Invalid / Unimplemented DMA HEADER command. 0x%x\n",
1079 cmd);
1080 state = state_error;
1081 }
1082 break;
1083 case state_error:
1084 default:
1085 return -EINVAL;
1086 }
1087 }
1088 if (state == state_error) {
1089 return -EINVAL;
1090 }
1091 return 0;
1092}
1093
1094static void
1095setup_hazard_table(hz_init_t init_table[], hazard_t table[], int size)
1096{
1097 int i;
1098
1099 for (i = 0; i < 256; ++i) {
1100 table[i] = forbidden_command;
1101 }
1102
1103 for (i = 0; i < size; ++i) {
1104 table[init_table[i].code] = init_table[i].hz;
1105 }
1106}
1107
1108void via_init_command_verifier(void)
1109{
1110 setup_hazard_table(init_table1, table1,
1111 sizeof(init_table1) / sizeof(hz_init_t));
1112 setup_hazard_table(init_table2, table2,
1113 sizeof(init_table2) / sizeof(hz_init_t));
1114 setup_hazard_table(init_table3, table3,
1115 sizeof(init_table3) / sizeof(hz_init_t));
1116}