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 <drm/drmP.h>
33 #include <drm/via_drm.h>
34 #include <drm/drm_legacy.h>
35 #include "via_verifier.h"
36 #include "via_drv.h"
37
38 typedef enum {
39 state_command,
40 state_header2,
41 state_header1,
42 state_vheader5,
43 state_vheader6,
44 state_error
45 } verifier_state_t;
46
47 typedef 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
84 static 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
112 typedef struct {
113 unsigned int code;
114 hazard_t hz;
115 } hz_init_t;
116
117 static 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
168 static 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
226 static 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
233 static hazard_t table1[256];
234 static hazard_t table2[256];
235 static hazard_t table3[256];
236
237 static __inline__ int
eat_words(const uint32_t ** buf,const uint32_t * buf_end,unsigned num_words)238 eat_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
via_drm_lookup_agp_map(drm_via_state_t * seq,unsigned long offset,unsigned long size,struct drm_device * dev)252 static __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
finish_current_sequence(drm_via_state_t * cur_seq)289 static __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
346 static __inline__ int
investigate_hazard(uint32_t cmd,hazard_t hz,drm_via_state_t * cur_seq)347 investigate_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
519 static __inline__ int
via_check_prim_list(uint32_t const ** buffer,const uint32_t * buf_end,drm_via_state_t * cur_seq)520 via_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
623 static __inline__ verifier_state_t
via_check_header2(uint32_t const ** buffer,const uint32_t * buf_end,drm_via_state_t * hc_state)624 via_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 *buffer = buf;
712 return state_command;
713 }
714
715 static __inline__ verifier_state_t
via_parse_header2(drm_via_private_t * dev_priv,uint32_t const ** buffer,const uint32_t * buf_end,int * fire_count)716 via_parse_header2(drm_via_private_t *dev_priv, uint32_t const **buffer,
717 const uint32_t *buf_end, int *fire_count)
718 {
719 uint32_t cmd;
720 const uint32_t *buf = *buffer;
721 const uint32_t *next_fire;
722 int burst = 0;
723
724 next_fire = dev_priv->fire_offsets[*fire_count];
725 buf++;
726 cmd = (*buf & 0xFFFF0000) >> 16;
727 VIA_WRITE(HC_REG_TRANS_SET + HC_REG_BASE, *buf++);
728 switch (cmd) {
729 case HC_ParaType_CmdVdata:
730 while ((buf < buf_end) &&
731 (*fire_count < dev_priv->num_fire_offsets) &&
732 (*buf & HC_ACMD_MASK) == HC_ACMD_HCmdB) {
733 while (buf <= next_fire) {
734 VIA_WRITE(HC_REG_TRANS_SPACE + HC_REG_BASE +
735 (burst & 63), *buf++);
736 burst += 4;
737 }
738 if ((buf < buf_end)
739 && ((*buf & HALCYON_FIREMASK) == HALCYON_FIRECMD))
740 buf++;
741
742 if (++(*fire_count) < dev_priv->num_fire_offsets)
743 next_fire = dev_priv->fire_offsets[*fire_count];
744 }
745 break;
746 default:
747 while (buf < buf_end) {
748
749 if (*buf == HC_HEADER2 ||
750 (*buf & HALCYON_HEADER1MASK) == HALCYON_HEADER1 ||
751 (*buf & VIA_VIDEOMASK) == VIA_VIDEO_HEADER5 ||
752 (*buf & VIA_VIDEOMASK) == VIA_VIDEO_HEADER6)
753 break;
754
755 VIA_WRITE(HC_REG_TRANS_SPACE + HC_REG_BASE +
756 (burst & 63), *buf++);
757 burst += 4;
758 }
759 }
760 *buffer = buf;
761 return state_command;
762 }
763
verify_mmio_address(uint32_t address)764 static __inline__ int verify_mmio_address(uint32_t address)
765 {
766 if ((address > 0x3FF) && (address < 0xC00)) {
767 DRM_ERROR("Invalid VIDEO DMA command. "
768 "Attempt to access 3D- or command burst area.\n");
769 return 1;
770 } else if ((address > 0xCFF) && (address < 0x1300)) {
771 DRM_ERROR("Invalid VIDEO DMA command. "
772 "Attempt to access PCI DMA area.\n");
773 return 1;
774 } else if (address > 0x13FF) {
775 DRM_ERROR("Invalid VIDEO DMA command. "
776 "Attempt to access VGA registers.\n");
777 return 1;
778 }
779 return 0;
780 }
781
782 static __inline__ int
verify_video_tail(uint32_t const ** buffer,const uint32_t * buf_end,uint32_t dwords)783 verify_video_tail(uint32_t const **buffer, const uint32_t * buf_end,
784 uint32_t dwords)
785 {
786 const uint32_t *buf = *buffer;
787
788 if (buf_end - buf < dwords) {
789 DRM_ERROR("Illegal termination of video command.\n");
790 return 1;
791 }
792 while (dwords--) {
793 if (*buf++) {
794 DRM_ERROR("Illegal video command tail.\n");
795 return 1;
796 }
797 }
798 *buffer = buf;
799 return 0;
800 }
801
802 static __inline__ verifier_state_t
via_check_header1(uint32_t const ** buffer,const uint32_t * buf_end)803 via_check_header1(uint32_t const **buffer, const uint32_t * buf_end)
804 {
805 uint32_t cmd;
806 const uint32_t *buf = *buffer;
807 verifier_state_t ret = state_command;
808
809 while (buf < buf_end) {
810 cmd = *buf;
811 if ((cmd > ((0x3FF >> 2) | HALCYON_HEADER1)) &&
812 (cmd < ((0xC00 >> 2) | HALCYON_HEADER1))) {
813 if ((cmd & HALCYON_HEADER1MASK) != HALCYON_HEADER1)
814 break;
815 DRM_ERROR("Invalid HALCYON_HEADER1 command. "
816 "Attempt to access 3D- or command burst area.\n");
817 ret = state_error;
818 break;
819 } else if (cmd > ((0xCFF >> 2) | HALCYON_HEADER1)) {
820 if ((cmd & HALCYON_HEADER1MASK) != HALCYON_HEADER1)
821 break;
822 DRM_ERROR("Invalid HALCYON_HEADER1 command. "
823 "Attempt to access VGA registers.\n");
824 ret = state_error;
825 break;
826 } else {
827 buf += 2;
828 }
829 }
830 *buffer = buf;
831 return ret;
832 }
833
834 static __inline__ verifier_state_t
via_parse_header1(drm_via_private_t * dev_priv,uint32_t const ** buffer,const uint32_t * buf_end)835 via_parse_header1(drm_via_private_t *dev_priv, uint32_t const **buffer,
836 const uint32_t *buf_end)
837 {
838 register uint32_t cmd;
839 const uint32_t *buf = *buffer;
840
841 while (buf < buf_end) {
842 cmd = *buf;
843 if ((cmd & HALCYON_HEADER1MASK) != HALCYON_HEADER1)
844 break;
845 VIA_WRITE((cmd & ~HALCYON_HEADER1MASK) << 2, *++buf);
846 buf++;
847 }
848 *buffer = buf;
849 return state_command;
850 }
851
852 static __inline__ verifier_state_t
via_check_vheader5(uint32_t const ** buffer,const uint32_t * buf_end)853 via_check_vheader5(uint32_t const **buffer, const uint32_t *buf_end)
854 {
855 uint32_t data;
856 const uint32_t *buf = *buffer;
857
858 if (buf_end - buf < 4) {
859 DRM_ERROR("Illegal termination of video header5 command\n");
860 return state_error;
861 }
862
863 data = *buf++ & ~VIA_VIDEOMASK;
864 if (verify_mmio_address(data))
865 return state_error;
866
867 data = *buf++;
868 if (*buf++ != 0x00F50000) {
869 DRM_ERROR("Illegal header5 header data\n");
870 return state_error;
871 }
872 if (*buf++ != 0x00000000) {
873 DRM_ERROR("Illegal header5 header data\n");
874 return state_error;
875 }
876 if (eat_words(&buf, buf_end, data))
877 return state_error;
878 if ((data & 3) && verify_video_tail(&buf, buf_end, 4 - (data & 3)))
879 return state_error;
880 *buffer = buf;
881 return state_command;
882
883 }
884
885 static __inline__ verifier_state_t
via_parse_vheader5(drm_via_private_t * dev_priv,uint32_t const ** buffer,const uint32_t * buf_end)886 via_parse_vheader5(drm_via_private_t *dev_priv, uint32_t const **buffer,
887 const uint32_t *buf_end)
888 {
889 uint32_t addr, count, i;
890 const uint32_t *buf = *buffer;
891
892 addr = *buf++ & ~VIA_VIDEOMASK;
893 i = count = *buf;
894 buf += 3;
895 while (i--)
896 VIA_WRITE(addr, *buf++);
897 if (count & 3)
898 buf += 4 - (count & 3);
899 *buffer = buf;
900 return state_command;
901 }
902
903 static __inline__ verifier_state_t
via_check_vheader6(uint32_t const ** buffer,const uint32_t * buf_end)904 via_check_vheader6(uint32_t const **buffer, const uint32_t * buf_end)
905 {
906 uint32_t data;
907 const uint32_t *buf = *buffer;
908 uint32_t i;
909
910 if (buf_end - buf < 4) {
911 DRM_ERROR("Illegal termination of video header6 command\n");
912 return state_error;
913 }
914 buf++;
915 data = *buf++;
916 if (*buf++ != 0x00F60000) {
917 DRM_ERROR("Illegal header6 header data\n");
918 return state_error;
919 }
920 if (*buf++ != 0x00000000) {
921 DRM_ERROR("Illegal header6 header data\n");
922 return state_error;
923 }
924 if ((buf_end - buf) < (data << 1)) {
925 DRM_ERROR("Illegal termination of video header6 command\n");
926 return state_error;
927 }
928 for (i = 0; i < data; ++i) {
929 if (verify_mmio_address(*buf++))
930 return state_error;
931 buf++;
932 }
933 data <<= 1;
934 if ((data & 3) && verify_video_tail(&buf, buf_end, 4 - (data & 3)))
935 return state_error;
936 *buffer = buf;
937 return state_command;
938 }
939
940 static __inline__ verifier_state_t
via_parse_vheader6(drm_via_private_t * dev_priv,uint32_t const ** buffer,const uint32_t * buf_end)941 via_parse_vheader6(drm_via_private_t *dev_priv, uint32_t const **buffer,
942 const uint32_t *buf_end)
943 {
944
945 uint32_t addr, count, i;
946 const uint32_t *buf = *buffer;
947
948 i = count = *++buf;
949 buf += 3;
950 while (i--) {
951 addr = *buf++;
952 VIA_WRITE(addr, *buf++);
953 }
954 count <<= 1;
955 if (count & 3)
956 buf += 4 - (count & 3);
957 *buffer = buf;
958 return state_command;
959 }
960
961 int
via_verify_command_stream(const uint32_t * buf,unsigned int size,struct drm_device * dev,int agp)962 via_verify_command_stream(const uint32_t * buf, unsigned int size,
963 struct drm_device * dev, int agp)
964 {
965
966 drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
967 drm_via_state_t *hc_state = &dev_priv->hc_state;
968 drm_via_state_t saved_state = *hc_state;
969 uint32_t cmd;
970 const uint32_t *buf_end = buf + (size >> 2);
971 verifier_state_t state = state_command;
972 int cme_video;
973 int supported_3d;
974
975 cme_video = (dev_priv->chipset == VIA_PRO_GROUP_A ||
976 dev_priv->chipset == VIA_DX9_0);
977
978 supported_3d = dev_priv->chipset != VIA_DX9_0;
979
980 hc_state->dev = dev;
981 hc_state->unfinished = no_sequence;
982 hc_state->map_cache = NULL;
983 hc_state->agp = agp;
984 hc_state->buf_start = buf;
985 dev_priv->num_fire_offsets = 0;
986
987 while (buf < buf_end) {
988
989 switch (state) {
990 case state_header2:
991 state = via_check_header2(&buf, buf_end, hc_state);
992 break;
993 case state_header1:
994 state = via_check_header1(&buf, buf_end);
995 break;
996 case state_vheader5:
997 state = via_check_vheader5(&buf, buf_end);
998 break;
999 case state_vheader6:
1000 state = via_check_vheader6(&buf, buf_end);
1001 break;
1002 case state_command:
1003 if ((HALCYON_HEADER2 == (cmd = *buf)) &&
1004 supported_3d)
1005 state = state_header2;
1006 else if ((cmd & HALCYON_HEADER1MASK) == HALCYON_HEADER1)
1007 state = state_header1;
1008 else if (cme_video
1009 && (cmd & VIA_VIDEOMASK) == VIA_VIDEO_HEADER5)
1010 state = state_vheader5;
1011 else if (cme_video
1012 && (cmd & VIA_VIDEOMASK) == VIA_VIDEO_HEADER6)
1013 state = state_vheader6;
1014 else if ((cmd == HALCYON_HEADER2) && !supported_3d) {
1015 DRM_ERROR("Accelerated 3D is not supported on this chipset yet.\n");
1016 state = state_error;
1017 } else {
1018 DRM_ERROR
1019 ("Invalid / Unimplemented DMA HEADER command. 0x%x\n",
1020 cmd);
1021 state = state_error;
1022 }
1023 break;
1024 case state_error:
1025 default:
1026 *hc_state = saved_state;
1027 return -EINVAL;
1028 }
1029 }
1030 if (state == state_error) {
1031 *hc_state = saved_state;
1032 return -EINVAL;
1033 }
1034 return 0;
1035 }
1036
1037 int
via_parse_command_stream(struct drm_device * dev,const uint32_t * buf,unsigned int size)1038 via_parse_command_stream(struct drm_device *dev, const uint32_t *buf,
1039 unsigned int size)
1040 {
1041
1042 drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
1043 uint32_t cmd;
1044 const uint32_t *buf_end = buf + (size >> 2);
1045 verifier_state_t state = state_command;
1046 int fire_count = 0;
1047
1048 while (buf < buf_end) {
1049
1050 switch (state) {
1051 case state_header2:
1052 state =
1053 via_parse_header2(dev_priv, &buf, buf_end,
1054 &fire_count);
1055 break;
1056 case state_header1:
1057 state = via_parse_header1(dev_priv, &buf, buf_end);
1058 break;
1059 case state_vheader5:
1060 state = via_parse_vheader5(dev_priv, &buf, buf_end);
1061 break;
1062 case state_vheader6:
1063 state = via_parse_vheader6(dev_priv, &buf, buf_end);
1064 break;
1065 case state_command:
1066 if (HALCYON_HEADER2 == (cmd = *buf))
1067 state = state_header2;
1068 else if ((cmd & HALCYON_HEADER1MASK) == HALCYON_HEADER1)
1069 state = state_header1;
1070 else if ((cmd & VIA_VIDEOMASK) == VIA_VIDEO_HEADER5)
1071 state = state_vheader5;
1072 else if ((cmd & VIA_VIDEOMASK) == VIA_VIDEO_HEADER6)
1073 state = state_vheader6;
1074 else {
1075 DRM_ERROR
1076 ("Invalid / Unimplemented DMA HEADER command. 0x%x\n",
1077 cmd);
1078 state = state_error;
1079 }
1080 break;
1081 case state_error:
1082 default:
1083 return -EINVAL;
1084 }
1085 }
1086 if (state == state_error)
1087 return -EINVAL;
1088 return 0;
1089 }
1090
1091 static void
setup_hazard_table(hz_init_t init_table[],hazard_t table[],int size)1092 setup_hazard_table(hz_init_t init_table[], hazard_t table[], int size)
1093 {
1094 int i;
1095
1096 for (i = 0; i < 256; ++i)
1097 table[i] = forbidden_command;
1098
1099 for (i = 0; i < size; ++i)
1100 table[init_table[i].code] = init_table[i].hz;
1101 }
1102
via_init_command_verifier(void)1103 void via_init_command_verifier(void)
1104 {
1105 setup_hazard_table(init_table1, table1,
1106 sizeof(init_table1) / sizeof(hz_init_t));
1107 setup_hazard_table(init_table2, table2,
1108 sizeof(init_table2) / sizeof(hz_init_t));
1109 setup_hazard_table(init_table3, table3,
1110 sizeof(init_table3) / sizeof(hz_init_t));
1111 }
1112