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[deliverable/linux.git] / drivers / char / drm / savage_bci.c
1 /* savage_bci.c -- BCI support for Savage
2 *
3 * Copyright 2004 Felix Kuehling
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sub license,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial portions
15 * of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
20 * NON-INFRINGEMENT. IN NO EVENT SHALL FELIX KUEHLING BE LIABLE FOR
21 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
22 * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 */
25 #include "drmP.h"
26 #include "savage_drm.h"
27 #include "savage_drv.h"
28
29 /* Need a long timeout for shadow status updates can take a while
30 * and so can waiting for events when the queue is full. */
31 #define SAVAGE_DEFAULT_USEC_TIMEOUT 1000000 /* 1s */
32 #define SAVAGE_EVENT_USEC_TIMEOUT 5000000 /* 5s */
33 #define SAVAGE_FREELIST_DEBUG 0
34
35 static int
36 savage_bci_wait_fifo_shadow(drm_savage_private_t *dev_priv, unsigned int n)
37 {
38 uint32_t mask = dev_priv->status_used_mask;
39 uint32_t threshold = dev_priv->bci_threshold_hi;
40 uint32_t status;
41 int i;
42
43 #if SAVAGE_BCI_DEBUG
44 if (n > dev_priv->cob_size + SAVAGE_BCI_FIFO_SIZE - threshold)
45 DRM_ERROR("Trying to emit %d words "
46 "(more than guaranteed space in COB)\n", n);
47 #endif
48
49 for (i = 0; i < SAVAGE_DEFAULT_USEC_TIMEOUT; i++) {
50 DRM_MEMORYBARRIER();
51 status = dev_priv->status_ptr[0];
52 if ((status & mask) < threshold)
53 return 0;
54 DRM_UDELAY(1);
55 }
56
57 #if SAVAGE_BCI_DEBUG
58 DRM_ERROR("failed!\n");
59 DRM_INFO(" status=0x%08x, threshold=0x%08x\n", status, threshold);
60 #endif
61 return DRM_ERR(EBUSY);
62 }
63
64 static int
65 savage_bci_wait_fifo_s3d(drm_savage_private_t *dev_priv, unsigned int n)
66 {
67 uint32_t maxUsed = dev_priv->cob_size + SAVAGE_BCI_FIFO_SIZE - n;
68 uint32_t status;
69 int i;
70
71 for (i = 0; i < SAVAGE_DEFAULT_USEC_TIMEOUT; i++) {
72 status = SAVAGE_READ(SAVAGE_STATUS_WORD0);
73 if ((status & SAVAGE_FIFO_USED_MASK_S3D) <= maxUsed)
74 return 0;
75 DRM_UDELAY(1);
76 }
77
78 #if SAVAGE_BCI_DEBUG
79 DRM_ERROR("failed!\n");
80 DRM_INFO(" status=0x%08x\n", status);
81 #endif
82 return DRM_ERR(EBUSY);
83 }
84
85 static int
86 savage_bci_wait_fifo_s4(drm_savage_private_t *dev_priv, unsigned int n)
87 {
88 uint32_t maxUsed = dev_priv->cob_size + SAVAGE_BCI_FIFO_SIZE - n;
89 uint32_t status;
90 int i;
91
92 for (i = 0; i < SAVAGE_DEFAULT_USEC_TIMEOUT; i++) {
93 status = SAVAGE_READ(SAVAGE_ALT_STATUS_WORD0);
94 if ((status & SAVAGE_FIFO_USED_MASK_S4) <= maxUsed)
95 return 0;
96 DRM_UDELAY(1);
97 }
98
99 #if SAVAGE_BCI_DEBUG
100 DRM_ERROR("failed!\n");
101 DRM_INFO(" status=0x%08x\n", status);
102 #endif
103 return DRM_ERR(EBUSY);
104 }
105
106 /*
107 * Waiting for events.
108 *
109 * The BIOSresets the event tag to 0 on mode changes. Therefore we
110 * never emit 0 to the event tag. If we find a 0 event tag we know the
111 * BIOS stomped on it and return success assuming that the BIOS waited
112 * for engine idle.
113 *
114 * Note: if the Xserver uses the event tag it has to follow the same
115 * rule. Otherwise there may be glitches every 2^16 events.
116 */
117 static int
118 savage_bci_wait_event_shadow(drm_savage_private_t *dev_priv, uint16_t e)
119 {
120 uint32_t status;
121 int i;
122
123 for (i = 0; i < SAVAGE_EVENT_USEC_TIMEOUT; i++) {
124 DRM_MEMORYBARRIER();
125 status = dev_priv->status_ptr[1];
126 if ((((status & 0xffff) - e) & 0xffff) <= 0x7fff ||
127 (status & 0xffff) == 0)
128 return 0;
129 DRM_UDELAY(1);
130 }
131
132 #if SAVAGE_BCI_DEBUG
133 DRM_ERROR("failed!\n");
134 DRM_INFO(" status=0x%08x, e=0x%04x\n", status, e);
135 #endif
136
137 return DRM_ERR(EBUSY);
138 }
139
140 static int
141 savage_bci_wait_event_reg(drm_savage_private_t *dev_priv, uint16_t e)
142 {
143 uint32_t status;
144 int i;
145
146 for (i = 0; i < SAVAGE_EVENT_USEC_TIMEOUT; i++) {
147 status = SAVAGE_READ(SAVAGE_STATUS_WORD1);
148 if ((((status & 0xffff) - e) & 0xffff) <= 0x7fff ||
149 (status & 0xffff) == 0)
150 return 0;
151 DRM_UDELAY(1);
152 }
153
154 #if SAVAGE_BCI_DEBUG
155 DRM_ERROR("failed!\n");
156 DRM_INFO(" status=0x%08x, e=0x%04x\n", status, e);
157 #endif
158
159 return DRM_ERR(EBUSY);
160 }
161
162 uint16_t savage_bci_emit_event(drm_savage_private_t *dev_priv,
163 unsigned int flags)
164 {
165 uint16_t count;
166 BCI_LOCALS;
167
168 if (dev_priv->status_ptr) {
169 /* coordinate with Xserver */
170 count = dev_priv->status_ptr[1023];
171 if (count < dev_priv->event_counter)
172 dev_priv->event_wrap++;
173 } else {
174 count = dev_priv->event_counter;
175 }
176 count = (count + 1) & 0xffff;
177 if (count == 0) {
178 count++; /* See the comment above savage_wait_event_*. */
179 dev_priv->event_wrap++;
180 }
181 dev_priv->event_counter = count;
182 if (dev_priv->status_ptr)
183 dev_priv->status_ptr[1023] = (uint32_t)count;
184
185 if ((flags & (SAVAGE_WAIT_2D | SAVAGE_WAIT_3D))) {
186 unsigned int wait_cmd = BCI_CMD_WAIT;
187 if ((flags & SAVAGE_WAIT_2D))
188 wait_cmd |= BCI_CMD_WAIT_2D;
189 if ((flags & SAVAGE_WAIT_3D))
190 wait_cmd |= BCI_CMD_WAIT_3D;
191 BEGIN_BCI(2);
192 BCI_WRITE(wait_cmd);
193 } else {
194 BEGIN_BCI(1);
195 }
196 BCI_WRITE(BCI_CMD_UPDATE_EVENT_TAG | (uint32_t)count);
197
198 return count;
199 }
200
201 /*
202 * Freelist management
203 */
204 static int savage_freelist_init(drm_device_t *dev)
205 {
206 drm_savage_private_t *dev_priv = dev->dev_private;
207 drm_device_dma_t *dma = dev->dma;
208 drm_buf_t *buf;
209 drm_savage_buf_priv_t *entry;
210 int i;
211 DRM_DEBUG("count=%d\n", dma->buf_count);
212
213 dev_priv->head.next = &dev_priv->tail;
214 dev_priv->head.prev = NULL;
215 dev_priv->head.buf = NULL;
216
217 dev_priv->tail.next = NULL;
218 dev_priv->tail.prev = &dev_priv->head;
219 dev_priv->tail.buf = NULL;
220
221 for (i = 0; i < dma->buf_count; i++) {
222 buf = dma->buflist[i];
223 entry = buf->dev_private;
224
225 SET_AGE(&entry->age, 0, 0);
226 entry->buf = buf;
227
228 entry->next = dev_priv->head.next;
229 entry->prev = &dev_priv->head;
230 dev_priv->head.next->prev = entry;
231 dev_priv->head.next = entry;
232 }
233
234 return 0;
235 }
236
237 static drm_buf_t *savage_freelist_get(drm_device_t *dev)
238 {
239 drm_savage_private_t *dev_priv = dev->dev_private;
240 drm_savage_buf_priv_t *tail = dev_priv->tail.prev;
241 uint16_t event;
242 unsigned int wrap;
243 DRM_DEBUG("\n");
244
245 UPDATE_EVENT_COUNTER();
246 if (dev_priv->status_ptr)
247 event = dev_priv->status_ptr[1] & 0xffff;
248 else
249 event = SAVAGE_READ(SAVAGE_STATUS_WORD1) & 0xffff;
250 wrap = dev_priv->event_wrap;
251 if (event > dev_priv->event_counter)
252 wrap--; /* hardware hasn't passed the last wrap yet */
253
254 DRM_DEBUG(" tail=0x%04x %d\n", tail->age.event, tail->age.wrap);
255 DRM_DEBUG(" head=0x%04x %d\n", event, wrap);
256
257 if (tail->buf && (TEST_AGE(&tail->age, event, wrap) || event == 0)) {
258 drm_savage_buf_priv_t *next = tail->next;
259 drm_savage_buf_priv_t *prev = tail->prev;
260 prev->next = next;
261 next->prev = prev;
262 tail->next = tail->prev = NULL;
263 return tail->buf;
264 }
265
266 DRM_DEBUG("returning NULL, tail->buf=%p!\n", tail->buf);
267 return NULL;
268 }
269
270 void savage_freelist_put(drm_device_t *dev, drm_buf_t *buf)
271 {
272 drm_savage_private_t *dev_priv = dev->dev_private;
273 drm_savage_buf_priv_t *entry = buf->dev_private, *prev, *next;
274
275 DRM_DEBUG("age=0x%04x wrap=%d\n", entry->age.event, entry->age.wrap);
276
277 if (entry->next != NULL || entry->prev != NULL) {
278 DRM_ERROR("entry already on freelist.\n");
279 return;
280 }
281
282 prev = &dev_priv->head;
283 next = prev->next;
284 prev->next = entry;
285 next->prev = entry;
286 entry->prev = prev;
287 entry->next = next;
288 }
289
290 /*
291 * Command DMA
292 */
293 static int savage_dma_init(drm_savage_private_t *dev_priv)
294 {
295 unsigned int i;
296
297 dev_priv->nr_dma_pages = dev_priv->cmd_dma->size /
298 (SAVAGE_DMA_PAGE_SIZE*4);
299 dev_priv->dma_pages = drm_alloc(sizeof(drm_savage_dma_page_t) *
300 dev_priv->nr_dma_pages,
301 DRM_MEM_DRIVER);
302 if (dev_priv->dma_pages == NULL)
303 return DRM_ERR(ENOMEM);
304
305 for (i = 0; i < dev_priv->nr_dma_pages; ++i) {
306 SET_AGE(&dev_priv->dma_pages[i].age, 0, 0);
307 dev_priv->dma_pages[i].used = 0;
308 dev_priv->dma_pages[i].flushed = 0;
309 }
310 SET_AGE(&dev_priv->last_dma_age, 0, 0);
311
312 dev_priv->first_dma_page = 0;
313 dev_priv->current_dma_page = 0;
314
315 return 0;
316 }
317
318 void savage_dma_reset(drm_savage_private_t *dev_priv)
319 {
320 uint16_t event;
321 unsigned int wrap, i;
322 event = savage_bci_emit_event(dev_priv, 0);
323 wrap = dev_priv->event_wrap;
324 for (i = 0; i < dev_priv->nr_dma_pages; ++i) {
325 SET_AGE(&dev_priv->dma_pages[i].age, event, wrap);
326 dev_priv->dma_pages[i].used = 0;
327 dev_priv->dma_pages[i].flushed = 0;
328 }
329 SET_AGE(&dev_priv->last_dma_age, event, wrap);
330 dev_priv->first_dma_page = dev_priv->current_dma_page = 0;
331 }
332
333 void savage_dma_wait(drm_savage_private_t *dev_priv, unsigned int page)
334 {
335 uint16_t event;
336 unsigned int wrap;
337
338 /* Faked DMA buffer pages don't age. */
339 if (dev_priv->cmd_dma == &dev_priv->fake_dma)
340 return;
341
342 UPDATE_EVENT_COUNTER();
343 if (dev_priv->status_ptr)
344 event = dev_priv->status_ptr[1] & 0xffff;
345 else
346 event = SAVAGE_READ(SAVAGE_STATUS_WORD1) & 0xffff;
347 wrap = dev_priv->event_wrap;
348 if (event > dev_priv->event_counter)
349 wrap--; /* hardware hasn't passed the last wrap yet */
350
351 if (dev_priv->dma_pages[page].age.wrap > wrap ||
352 (dev_priv->dma_pages[page].age.wrap == wrap &&
353 dev_priv->dma_pages[page].age.event > event)) {
354 if (dev_priv->wait_evnt(dev_priv,
355 dev_priv->dma_pages[page].age.event)
356 < 0)
357 DRM_ERROR("wait_evnt failed!\n");
358 }
359 }
360
361 uint32_t *savage_dma_alloc(drm_savage_private_t *dev_priv, unsigned int n)
362 {
363 unsigned int cur = dev_priv->current_dma_page;
364 unsigned int rest = SAVAGE_DMA_PAGE_SIZE -
365 dev_priv->dma_pages[cur].used;
366 unsigned int nr_pages = (n - rest + SAVAGE_DMA_PAGE_SIZE-1) /
367 SAVAGE_DMA_PAGE_SIZE;
368 uint32_t *dma_ptr;
369 unsigned int i;
370
371 DRM_DEBUG("cur=%u, cur->used=%u, n=%u, rest=%u, nr_pages=%u\n",
372 cur, dev_priv->dma_pages[cur].used, n, rest, nr_pages);
373
374 if (cur + nr_pages < dev_priv->nr_dma_pages) {
375 dma_ptr = (uint32_t *)dev_priv->cmd_dma->handle +
376 cur*SAVAGE_DMA_PAGE_SIZE +
377 dev_priv->dma_pages[cur].used;
378 if (n < rest)
379 rest = n;
380 dev_priv->dma_pages[cur].used += rest;
381 n -= rest;
382 cur++;
383 } else {
384 dev_priv->dma_flush(dev_priv);
385 nr_pages = (n + SAVAGE_DMA_PAGE_SIZE-1) / SAVAGE_DMA_PAGE_SIZE;
386 for (i = cur; i < dev_priv->nr_dma_pages; ++i) {
387 dev_priv->dma_pages[i].age = dev_priv->last_dma_age;
388 dev_priv->dma_pages[i].used = 0;
389 dev_priv->dma_pages[i].flushed = 0;
390 }
391 dma_ptr = (uint32_t *)dev_priv->cmd_dma->handle;
392 dev_priv->first_dma_page = cur = 0;
393 }
394 for (i = cur; nr_pages > 0; ++i, --nr_pages) {
395 #if SAVAGE_DMA_DEBUG
396 if (dev_priv->dma_pages[i].used) {
397 DRM_ERROR("unflushed page %u: used=%u\n",
398 i, dev_priv->dma_pages[i].used);
399 }
400 #endif
401 if (n > SAVAGE_DMA_PAGE_SIZE)
402 dev_priv->dma_pages[i].used = SAVAGE_DMA_PAGE_SIZE;
403 else
404 dev_priv->dma_pages[i].used = n;
405 n -= SAVAGE_DMA_PAGE_SIZE;
406 }
407 dev_priv->current_dma_page = --i;
408
409 DRM_DEBUG("cur=%u, cur->used=%u, n=%u\n",
410 i, dev_priv->dma_pages[i].used, n);
411
412 savage_dma_wait(dev_priv, dev_priv->current_dma_page);
413
414 return dma_ptr;
415 }
416
417 static void savage_dma_flush(drm_savage_private_t *dev_priv)
418 {
419 unsigned int first = dev_priv->first_dma_page;
420 unsigned int cur = dev_priv->current_dma_page;
421 uint16_t event;
422 unsigned int wrap, pad, align, len, i;
423 unsigned long phys_addr;
424 BCI_LOCALS;
425
426 if (first == cur &&
427 dev_priv->dma_pages[cur].used == dev_priv->dma_pages[cur].flushed)
428 return;
429
430 /* pad length to multiples of 2 entries
431 * align start of next DMA block to multiles of 8 entries */
432 pad = -dev_priv->dma_pages[cur].used & 1;
433 align = -(dev_priv->dma_pages[cur].used + pad) & 7;
434
435 DRM_DEBUG("first=%u, cur=%u, first->flushed=%u, cur->used=%u, "
436 "pad=%u, align=%u\n",
437 first, cur, dev_priv->dma_pages[first].flushed,
438 dev_priv->dma_pages[cur].used, pad, align);
439
440 /* pad with noops */
441 if (pad) {
442 uint32_t *dma_ptr = (uint32_t *)dev_priv->cmd_dma->handle +
443 cur * SAVAGE_DMA_PAGE_SIZE +
444 dev_priv->dma_pages[cur].used;
445 dev_priv->dma_pages[cur].used += pad;
446 while(pad != 0) {
447 *dma_ptr++ = BCI_CMD_WAIT;
448 pad--;
449 }
450 }
451
452 DRM_MEMORYBARRIER();
453
454 /* do flush ... */
455 phys_addr = dev_priv->cmd_dma->offset +
456 (first * SAVAGE_DMA_PAGE_SIZE +
457 dev_priv->dma_pages[first].flushed) * 4;
458 len = (cur - first) * SAVAGE_DMA_PAGE_SIZE +
459 dev_priv->dma_pages[cur].used -
460 dev_priv->dma_pages[first].flushed;
461
462 DRM_DEBUG("phys_addr=%lx, len=%u\n",
463 phys_addr | dev_priv->dma_type, len);
464
465 BEGIN_BCI(3);
466 BCI_SET_REGISTERS(SAVAGE_DMABUFADDR, 1);
467 BCI_WRITE(phys_addr | dev_priv->dma_type);
468 BCI_DMA(len);
469
470 /* fix alignment of the start of the next block */
471 dev_priv->dma_pages[cur].used += align;
472
473 /* age DMA pages */
474 event = savage_bci_emit_event(dev_priv, 0);
475 wrap = dev_priv->event_wrap;
476 for (i = first; i < cur; ++i) {
477 SET_AGE(&dev_priv->dma_pages[i].age, event, wrap);
478 dev_priv->dma_pages[i].used = 0;
479 dev_priv->dma_pages[i].flushed = 0;
480 }
481 /* age the current page only when it's full */
482 if (dev_priv->dma_pages[cur].used == SAVAGE_DMA_PAGE_SIZE) {
483 SET_AGE(&dev_priv->dma_pages[cur].age, event, wrap);
484 dev_priv->dma_pages[cur].used = 0;
485 dev_priv->dma_pages[cur].flushed = 0;
486 /* advance to next page */
487 cur++;
488 if (cur == dev_priv->nr_dma_pages)
489 cur = 0;
490 dev_priv->first_dma_page = dev_priv->current_dma_page = cur;
491 } else {
492 dev_priv->first_dma_page = cur;
493 dev_priv->dma_pages[cur].flushed = dev_priv->dma_pages[i].used;
494 }
495 SET_AGE(&dev_priv->last_dma_age, event, wrap);
496
497 DRM_DEBUG("first=cur=%u, cur->used=%u, cur->flushed=%u\n", cur,
498 dev_priv->dma_pages[cur].used,
499 dev_priv->dma_pages[cur].flushed);
500 }
501
502 static void savage_fake_dma_flush(drm_savage_private_t *dev_priv)
503 {
504 unsigned int i, j;
505 BCI_LOCALS;
506
507 if (dev_priv->first_dma_page == dev_priv->current_dma_page &&
508 dev_priv->dma_pages[dev_priv->current_dma_page].used == 0)
509 return;
510
511 DRM_DEBUG("first=%u, cur=%u, cur->used=%u\n",
512 dev_priv->first_dma_page, dev_priv->current_dma_page,
513 dev_priv->dma_pages[dev_priv->current_dma_page].used);
514
515 for (i = dev_priv->first_dma_page;
516 i <= dev_priv->current_dma_page && dev_priv->dma_pages[i].used;
517 ++i) {
518 uint32_t *dma_ptr = (uint32_t *)dev_priv->cmd_dma->handle +
519 i * SAVAGE_DMA_PAGE_SIZE;
520 #if SAVAGE_DMA_DEBUG
521 /* Sanity check: all pages except the last one must be full. */
522 if (i < dev_priv->current_dma_page &&
523 dev_priv->dma_pages[i].used != SAVAGE_DMA_PAGE_SIZE) {
524 DRM_ERROR("partial DMA page %u: used=%u",
525 i, dev_priv->dma_pages[i].used);
526 }
527 #endif
528 BEGIN_BCI(dev_priv->dma_pages[i].used);
529 for (j = 0; j < dev_priv->dma_pages[i].used; ++j) {
530 BCI_WRITE(dma_ptr[j]);
531 }
532 dev_priv->dma_pages[i].used = 0;
533 }
534
535 /* reset to first page */
536 dev_priv->first_dma_page = dev_priv->current_dma_page = 0;
537 }
538
539 /*
540 * Initalize mappings. On Savage4 and SavageIX the alignment
541 * and size of the aperture is not suitable for automatic MTRR setup
542 * in drm_addmap. Therefore we do it manually before the maps are
543 * initialized. We also need to take care of deleting the MTRRs in
544 * postcleanup.
545 */
546 int savage_preinit(drm_device_t *dev, unsigned long chipset)
547 {
548 drm_savage_private_t *dev_priv;
549 unsigned long mmio_base, fb_base, fb_size, aperture_base;
550 /* fb_rsrc and aper_rsrc aren't really used currently, but still exist
551 * in case we decide we need information on the BAR for BSD in the
552 * future.
553 */
554 unsigned int fb_rsrc, aper_rsrc;
555 int ret = 0;
556
557 dev_priv = drm_alloc(sizeof(drm_savage_private_t), DRM_MEM_DRIVER);
558 if (dev_priv == NULL)
559 return DRM_ERR(ENOMEM);
560
561 memset(dev_priv, 0, sizeof(drm_savage_private_t));
562 dev->dev_private = (void *)dev_priv;
563 dev_priv->chipset = (enum savage_family)chipset;
564
565 dev_priv->mtrr[0].handle = -1;
566 dev_priv->mtrr[1].handle = -1;
567 dev_priv->mtrr[2].handle = -1;
568 if (S3_SAVAGE3D_SERIES(dev_priv->chipset)) {
569 fb_rsrc = 0;
570 fb_base = drm_get_resource_start(dev, 0);
571 fb_size = SAVAGE_FB_SIZE_S3;
572 mmio_base = fb_base + SAVAGE_FB_SIZE_S3;
573 aper_rsrc = 0;
574 aperture_base = fb_base + SAVAGE_APERTURE_OFFSET;
575 /* this should always be true */
576 if (drm_get_resource_len(dev, 0) == 0x08000000) {
577 /* Don't make MMIO write-cobining! We need 3
578 * MTRRs. */
579 dev_priv->mtrr[0].base = fb_base;
580 dev_priv->mtrr[0].size = 0x01000000;
581 dev_priv->mtrr[0].handle = mtrr_add(
582 dev_priv->mtrr[0].base, dev_priv->mtrr[0].size,
583 MTRR_TYPE_WRCOMB, 1);
584 dev_priv->mtrr[1].base = fb_base+0x02000000;
585 dev_priv->mtrr[1].size = 0x02000000;
586 dev_priv->mtrr[1].handle = mtrr_add(
587 dev_priv->mtrr[1].base, dev_priv->mtrr[1].size,
588 MTRR_TYPE_WRCOMB, 1);
589 dev_priv->mtrr[2].base = fb_base+0x04000000;
590 dev_priv->mtrr[2].size = 0x04000000;
591 dev_priv->mtrr[2].handle = mtrr_add(
592 dev_priv->mtrr[2].base, dev_priv->mtrr[2].size,
593 MTRR_TYPE_WRCOMB, 1);
594 } else {
595 DRM_ERROR("strange pci_resource_len %08lx\n",
596 drm_get_resource_len(dev, 0));
597 }
598 } else if (chipset != S3_SUPERSAVAGE && chipset != S3_SAVAGE2000) {
599 mmio_base = drm_get_resource_start(dev, 0);
600 fb_rsrc = 1;
601 fb_base = drm_get_resource_start(dev, 1);
602 fb_size = SAVAGE_FB_SIZE_S4;
603 aper_rsrc = 1;
604 aperture_base = fb_base + SAVAGE_APERTURE_OFFSET;
605 /* this should always be true */
606 if (drm_get_resource_len(dev, 1) == 0x08000000) {
607 /* Can use one MTRR to cover both fb and
608 * aperture. */
609 dev_priv->mtrr[0].base = fb_base;
610 dev_priv->mtrr[0].size = 0x08000000;
611 dev_priv->mtrr[0].handle = mtrr_add(
612 dev_priv->mtrr[0].base, dev_priv->mtrr[0].size,
613 MTRR_TYPE_WRCOMB, 1);
614 } else {
615 DRM_ERROR("strange pci_resource_len %08lx\n",
616 drm_get_resource_len(dev, 1));
617 }
618 } else {
619 mmio_base = drm_get_resource_start(dev, 0);
620 fb_rsrc = 1;
621 fb_base = drm_get_resource_start(dev, 1);
622 fb_size = drm_get_resource_len(dev, 1);
623 aper_rsrc = 2;
624 aperture_base = drm_get_resource_start(dev, 2);
625 /* Automatic MTRR setup will do the right thing. */
626 }
627
628 ret = drm_addmap(dev, mmio_base, SAVAGE_MMIO_SIZE, _DRM_REGISTERS,
629 _DRM_READ_ONLY, &dev_priv->mmio);
630 if (ret)
631 return ret;
632
633 ret = drm_addmap(dev, fb_base, fb_size, _DRM_FRAME_BUFFER,
634 _DRM_WRITE_COMBINING, &dev_priv->fb);
635 if (ret)
636 return ret;
637
638 ret = drm_addmap(dev, aperture_base, SAVAGE_APERTURE_SIZE,
639 _DRM_FRAME_BUFFER, _DRM_WRITE_COMBINING,
640 &dev_priv->aperture);
641 if (ret)
642 return ret;
643
644 return ret;
645 }
646
647 /*
648 * Delete MTRRs and free device-private data.
649 */
650 int savage_postcleanup(drm_device_t *dev)
651 {
652 drm_savage_private_t *dev_priv = dev->dev_private;
653 int i;
654
655 for (i = 0; i < 3; ++i)
656 if (dev_priv->mtrr[i].handle >= 0)
657 mtrr_del(dev_priv->mtrr[i].handle,
658 dev_priv->mtrr[i].base,
659 dev_priv->mtrr[i].size);
660
661 drm_free(dev_priv, sizeof(drm_savage_private_t), DRM_MEM_DRIVER);
662
663 return 0;
664 }
665
666 static int savage_do_init_bci(drm_device_t *dev, drm_savage_init_t *init)
667 {
668 drm_savage_private_t *dev_priv = dev->dev_private;
669
670 if (init->fb_bpp != 16 && init->fb_bpp != 32) {
671 DRM_ERROR("invalid frame buffer bpp %d!\n", init->fb_bpp);
672 return DRM_ERR(EINVAL);
673 }
674 if (init->depth_bpp != 16 && init->depth_bpp != 32) {
675 DRM_ERROR("invalid depth buffer bpp %d!\n", init->fb_bpp);
676 return DRM_ERR(EINVAL);
677 }
678 if (init->dma_type != SAVAGE_DMA_AGP &&
679 init->dma_type != SAVAGE_DMA_PCI) {
680 DRM_ERROR("invalid dma memory type %d!\n", init->dma_type);
681 return DRM_ERR(EINVAL);
682 }
683
684 dev_priv->cob_size = init->cob_size;
685 dev_priv->bci_threshold_lo = init->bci_threshold_lo;
686 dev_priv->bci_threshold_hi = init->bci_threshold_hi;
687 dev_priv->dma_type = init->dma_type;
688
689 dev_priv->fb_bpp = init->fb_bpp;
690 dev_priv->front_offset = init->front_offset;
691 dev_priv->front_pitch = init->front_pitch;
692 dev_priv->back_offset = init->back_offset;
693 dev_priv->back_pitch = init->back_pitch;
694 dev_priv->depth_bpp = init->depth_bpp;
695 dev_priv->depth_offset = init->depth_offset;
696 dev_priv->depth_pitch = init->depth_pitch;
697
698 dev_priv->texture_offset = init->texture_offset;
699 dev_priv->texture_size = init->texture_size;
700
701 DRM_GETSAREA();
702 if (!dev_priv->sarea) {
703 DRM_ERROR("could not find sarea!\n");
704 savage_do_cleanup_bci(dev);
705 return DRM_ERR(EINVAL);
706 }
707 if (init->status_offset != 0) {
708 dev_priv->status = drm_core_findmap(dev, init->status_offset);
709 if (!dev_priv->status) {
710 DRM_ERROR("could not find shadow status region!\n");
711 savage_do_cleanup_bci(dev);
712 return DRM_ERR(EINVAL);
713 }
714 } else {
715 dev_priv->status = NULL;
716 }
717 if (dev_priv->dma_type == SAVAGE_DMA_AGP && init->buffers_offset) {
718 dev->agp_buffer_map = drm_core_findmap(dev,
719 init->buffers_offset);
720 if (!dev->agp_buffer_map) {
721 DRM_ERROR("could not find DMA buffer region!\n");
722 savage_do_cleanup_bci(dev);
723 return DRM_ERR(EINVAL);
724 }
725 drm_core_ioremap(dev->agp_buffer_map, dev);
726 if (!dev->agp_buffer_map) {
727 DRM_ERROR("failed to ioremap DMA buffer region!\n");
728 savage_do_cleanup_bci(dev);
729 return DRM_ERR(ENOMEM);
730 }
731 }
732 if (init->agp_textures_offset) {
733 dev_priv->agp_textures =
734 drm_core_findmap(dev, init->agp_textures_offset);
735 if (!dev_priv->agp_textures) {
736 DRM_ERROR("could not find agp texture region!\n");
737 savage_do_cleanup_bci(dev);
738 return DRM_ERR(EINVAL);
739 }
740 } else {
741 dev_priv->agp_textures = NULL;
742 }
743
744 if (init->cmd_dma_offset) {
745 if (S3_SAVAGE3D_SERIES(dev_priv->chipset)) {
746 DRM_ERROR("command DMA not supported on "
747 "Savage3D/MX/IX.\n");
748 savage_do_cleanup_bci(dev);
749 return DRM_ERR(EINVAL);
750 }
751 if (dev->dma && dev->dma->buflist) {
752 DRM_ERROR("command and vertex DMA not supported "
753 "at the same time.\n");
754 savage_do_cleanup_bci(dev);
755 return DRM_ERR(EINVAL);
756 }
757 dev_priv->cmd_dma = drm_core_findmap(dev, init->cmd_dma_offset);
758 if (!dev_priv->cmd_dma) {
759 DRM_ERROR("could not find command DMA region!\n");
760 savage_do_cleanup_bci(dev);
761 return DRM_ERR(EINVAL);
762 }
763 if (dev_priv->dma_type == SAVAGE_DMA_AGP) {
764 if (dev_priv->cmd_dma->type != _DRM_AGP) {
765 DRM_ERROR("AGP command DMA region is not a "
766 "_DRM_AGP map!\n");
767 savage_do_cleanup_bci(dev);
768 return DRM_ERR(EINVAL);
769 }
770 drm_core_ioremap(dev_priv->cmd_dma, dev);
771 if (!dev_priv->cmd_dma->handle) {
772 DRM_ERROR("failed to ioremap command "
773 "DMA region!\n");
774 savage_do_cleanup_bci(dev);
775 return DRM_ERR(ENOMEM);
776 }
777 } else if (dev_priv->cmd_dma->type != _DRM_CONSISTENT) {
778 DRM_ERROR("PCI command DMA region is not a "
779 "_DRM_CONSISTENT map!\n");
780 savage_do_cleanup_bci(dev);
781 return DRM_ERR(EINVAL);
782 }
783 } else {
784 dev_priv->cmd_dma = NULL;
785 }
786
787 dev_priv->dma_flush = savage_dma_flush;
788 if (!dev_priv->cmd_dma) {
789 DRM_DEBUG("falling back to faked command DMA.\n");
790 dev_priv->fake_dma.offset = 0;
791 dev_priv->fake_dma.size = SAVAGE_FAKE_DMA_SIZE;
792 dev_priv->fake_dma.type = _DRM_SHM;
793 dev_priv->fake_dma.handle = drm_alloc(SAVAGE_FAKE_DMA_SIZE,
794 DRM_MEM_DRIVER);
795 if (!dev_priv->fake_dma.handle) {
796 DRM_ERROR("could not allocate faked DMA buffer!\n");
797 savage_do_cleanup_bci(dev);
798 return DRM_ERR(ENOMEM);
799 }
800 dev_priv->cmd_dma = &dev_priv->fake_dma;
801 dev_priv->dma_flush = savage_fake_dma_flush;
802 }
803
804 dev_priv->sarea_priv =
805 (drm_savage_sarea_t *)((uint8_t *)dev_priv->sarea->handle +
806 init->sarea_priv_offset);
807
808 /* setup bitmap descriptors */
809 {
810 unsigned int color_tile_format;
811 unsigned int depth_tile_format;
812 unsigned int front_stride, back_stride, depth_stride;
813 if (dev_priv->chipset <= S3_SAVAGE4) {
814 color_tile_format = dev_priv->fb_bpp == 16 ?
815 SAVAGE_BD_TILE_16BPP : SAVAGE_BD_TILE_32BPP;
816 depth_tile_format = dev_priv->depth_bpp == 16 ?
817 SAVAGE_BD_TILE_16BPP : SAVAGE_BD_TILE_32BPP;
818 } else {
819 color_tile_format = SAVAGE_BD_TILE_DEST;
820 depth_tile_format = SAVAGE_BD_TILE_DEST;
821 }
822 front_stride = dev_priv->front_pitch / (dev_priv->fb_bpp/8);
823 back_stride = dev_priv-> back_pitch / (dev_priv->fb_bpp/8);
824 depth_stride = dev_priv->depth_pitch / (dev_priv->depth_bpp/8);
825
826 dev_priv->front_bd = front_stride | SAVAGE_BD_BW_DISABLE |
827 (dev_priv->fb_bpp << SAVAGE_BD_BPP_SHIFT) |
828 (color_tile_format << SAVAGE_BD_TILE_SHIFT);
829
830 dev_priv-> back_bd = back_stride | SAVAGE_BD_BW_DISABLE |
831 (dev_priv->fb_bpp << SAVAGE_BD_BPP_SHIFT) |
832 (color_tile_format << SAVAGE_BD_TILE_SHIFT);
833
834 dev_priv->depth_bd = depth_stride | SAVAGE_BD_BW_DISABLE |
835 (dev_priv->depth_bpp << SAVAGE_BD_BPP_SHIFT) |
836 (depth_tile_format << SAVAGE_BD_TILE_SHIFT);
837 }
838
839 /* setup status and bci ptr */
840 dev_priv->event_counter = 0;
841 dev_priv->event_wrap = 0;
842 dev_priv->bci_ptr = (volatile uint32_t *)
843 ((uint8_t *)dev_priv->mmio->handle + SAVAGE_BCI_OFFSET);
844 if (S3_SAVAGE3D_SERIES(dev_priv->chipset)) {
845 dev_priv->status_used_mask = SAVAGE_FIFO_USED_MASK_S3D;
846 } else {
847 dev_priv->status_used_mask = SAVAGE_FIFO_USED_MASK_S4;
848 }
849 if (dev_priv->status != NULL) {
850 dev_priv->status_ptr =
851 (volatile uint32_t *)dev_priv->status->handle;
852 dev_priv->wait_fifo = savage_bci_wait_fifo_shadow;
853 dev_priv->wait_evnt = savage_bci_wait_event_shadow;
854 dev_priv->status_ptr[1023] = dev_priv->event_counter;
855 } else {
856 dev_priv->status_ptr = NULL;
857 if (S3_SAVAGE3D_SERIES(dev_priv->chipset)) {
858 dev_priv->wait_fifo = savage_bci_wait_fifo_s3d;
859 } else {
860 dev_priv->wait_fifo = savage_bci_wait_fifo_s4;
861 }
862 dev_priv->wait_evnt = savage_bci_wait_event_reg;
863 }
864
865 /* cliprect functions */
866 if (S3_SAVAGE3D_SERIES(dev_priv->chipset))
867 dev_priv->emit_clip_rect = savage_emit_clip_rect_s3d;
868 else
869 dev_priv->emit_clip_rect = savage_emit_clip_rect_s4;
870
871 if (savage_freelist_init(dev) < 0) {
872 DRM_ERROR("could not initialize freelist\n");
873 savage_do_cleanup_bci(dev);
874 return DRM_ERR(ENOMEM);
875 }
876
877 if (savage_dma_init(dev_priv) < 0) {
878 DRM_ERROR("could not initialize command DMA\n");
879 savage_do_cleanup_bci(dev);
880 return DRM_ERR(ENOMEM);
881 }
882
883 return 0;
884 }
885
886 int savage_do_cleanup_bci(drm_device_t *dev)
887 {
888 drm_savage_private_t *dev_priv = dev->dev_private;
889
890 if (dev_priv->cmd_dma == &dev_priv->fake_dma) {
891 if (dev_priv->fake_dma.handle)
892 drm_free(dev_priv->fake_dma.handle,
893 SAVAGE_FAKE_DMA_SIZE, DRM_MEM_DRIVER);
894 } else if (dev_priv->cmd_dma && dev_priv->cmd_dma->handle &&
895 dev_priv->cmd_dma->type == _DRM_AGP &&
896 dev_priv->dma_type == SAVAGE_DMA_AGP)
897 drm_core_ioremapfree(dev_priv->cmd_dma, dev);
898
899 if (dev_priv->dma_type == SAVAGE_DMA_AGP &&
900 dev->agp_buffer_map && dev->agp_buffer_map->handle) {
901 drm_core_ioremapfree(dev->agp_buffer_map, dev);
902 /* make sure the next instance (which may be running
903 * in PCI mode) doesn't try to use an old
904 * agp_buffer_map. */
905 dev->agp_buffer_map = NULL;
906 }
907
908 if (dev_priv->dma_pages)
909 drm_free(dev_priv->dma_pages,
910 sizeof(drm_savage_dma_page_t)*dev_priv->nr_dma_pages,
911 DRM_MEM_DRIVER);
912
913 return 0;
914 }
915
916 static int savage_bci_init(DRM_IOCTL_ARGS)
917 {
918 DRM_DEVICE;
919 drm_savage_init_t init;
920
921 LOCK_TEST_WITH_RETURN(dev, filp);
922
923 DRM_COPY_FROM_USER_IOCTL(init, (drm_savage_init_t __user *)data,
924 sizeof(init));
925
926 switch (init.func) {
927 case SAVAGE_INIT_BCI:
928 return savage_do_init_bci(dev, &init);
929 case SAVAGE_CLEANUP_BCI:
930 return savage_do_cleanup_bci(dev);
931 }
932
933 return DRM_ERR(EINVAL);
934 }
935
936 static int savage_bci_event_emit(DRM_IOCTL_ARGS)
937 {
938 DRM_DEVICE;
939 drm_savage_private_t *dev_priv = dev->dev_private;
940 drm_savage_event_emit_t event;
941
942 DRM_DEBUG("\n");
943
944 LOCK_TEST_WITH_RETURN(dev, filp);
945
946 DRM_COPY_FROM_USER_IOCTL(event, (drm_savage_event_emit_t __user *)data,
947 sizeof(event));
948
949 event.count = savage_bci_emit_event(dev_priv, event.flags);
950 event.count |= dev_priv->event_wrap << 16;
951 DRM_COPY_TO_USER_IOCTL(&((drm_savage_event_emit_t __user *)data)->count,
952 event.count, sizeof(event.count));
953 return 0;
954 }
955
956 static int savage_bci_event_wait(DRM_IOCTL_ARGS)
957 {
958 DRM_DEVICE;
959 drm_savage_private_t *dev_priv = dev->dev_private;
960 drm_savage_event_wait_t event;
961 unsigned int event_e, hw_e;
962 unsigned int event_w, hw_w;
963
964 DRM_DEBUG("\n");
965
966 DRM_COPY_FROM_USER_IOCTL(event, (drm_savage_event_wait_t __user *)data,
967 sizeof(event));
968
969 UPDATE_EVENT_COUNTER();
970 if (dev_priv->status_ptr)
971 hw_e = dev_priv->status_ptr[1] & 0xffff;
972 else
973 hw_e = SAVAGE_READ(SAVAGE_STATUS_WORD1) & 0xffff;
974 hw_w = dev_priv->event_wrap;
975 if (hw_e > dev_priv->event_counter)
976 hw_w--; /* hardware hasn't passed the last wrap yet */
977
978 event_e = event.count & 0xffff;
979 event_w = event.count >> 16;
980
981 /* Don't need to wait if
982 * - event counter wrapped since the event was emitted or
983 * - the hardware has advanced up to or over the event to wait for.
984 */
985 if (event_w < hw_w || (event_w == hw_w && event_e <= hw_e) )
986 return 0;
987 else
988 return dev_priv->wait_evnt(dev_priv, event_e);
989 }
990
991 /*
992 * DMA buffer management
993 */
994
995 static int savage_bci_get_buffers(DRMFILE filp, drm_device_t *dev, drm_dma_t *d)
996 {
997 drm_buf_t *buf;
998 int i;
999
1000 for (i = d->granted_count; i < d->request_count; i++) {
1001 buf = savage_freelist_get(dev);
1002 if (!buf)
1003 return DRM_ERR(EAGAIN);
1004
1005 buf->filp = filp;
1006
1007 if (DRM_COPY_TO_USER(&d->request_indices[i],
1008 &buf->idx, sizeof(buf->idx)))
1009 return DRM_ERR(EFAULT);
1010 if (DRM_COPY_TO_USER(&d->request_sizes[i],
1011 &buf->total, sizeof(buf->total)))
1012 return DRM_ERR(EFAULT);
1013
1014 d->granted_count++;
1015 }
1016 return 0;
1017 }
1018
1019 int savage_bci_buffers(DRM_IOCTL_ARGS)
1020 {
1021 DRM_DEVICE;
1022 drm_device_dma_t *dma = dev->dma;
1023 drm_dma_t d;
1024 int ret = 0;
1025
1026 LOCK_TEST_WITH_RETURN(dev, filp);
1027
1028 DRM_COPY_FROM_USER_IOCTL(d, (drm_dma_t __user *)data, sizeof(d));
1029
1030 /* Please don't send us buffers.
1031 */
1032 if (d.send_count != 0) {
1033 DRM_ERROR("Process %d trying to send %d buffers via drmDMA\n",
1034 DRM_CURRENTPID, d.send_count);
1035 return DRM_ERR(EINVAL);
1036 }
1037
1038 /* We'll send you buffers.
1039 */
1040 if (d.request_count < 0 || d.request_count > dma->buf_count) {
1041 DRM_ERROR("Process %d trying to get %d buffers (of %d max)\n",
1042 DRM_CURRENTPID, d.request_count, dma->buf_count);
1043 return DRM_ERR(EINVAL);
1044 }
1045
1046 d.granted_count = 0;
1047
1048 if (d.request_count) {
1049 ret = savage_bci_get_buffers(filp, dev, &d);
1050 }
1051
1052 DRM_COPY_TO_USER_IOCTL((drm_dma_t __user *)data, d, sizeof(d));
1053
1054 return ret;
1055 }
1056
1057 void savage_reclaim_buffers(drm_device_t *dev, DRMFILE filp) {
1058 drm_device_dma_t *dma = dev->dma;
1059 drm_savage_private_t *dev_priv = dev->dev_private;
1060 int i;
1061
1062 if (!dma)
1063 return;
1064 if (!dev_priv)
1065 return;
1066 if (!dma->buflist)
1067 return;
1068
1069 /*i830_flush_queue(dev);*/
1070
1071 for (i = 0; i < dma->buf_count; i++) {
1072 drm_buf_t *buf = dma->buflist[i];
1073 drm_savage_buf_priv_t *buf_priv = buf->dev_private;
1074
1075 if (buf->filp == filp && buf_priv &&
1076 buf_priv->next == NULL && buf_priv->prev == NULL) {
1077 uint16_t event;
1078 DRM_DEBUG("reclaimed from client\n");
1079 event = savage_bci_emit_event(dev_priv, SAVAGE_WAIT_3D);
1080 SET_AGE(&buf_priv->age, event, dev_priv->event_wrap);
1081 savage_freelist_put(dev, buf);
1082 }
1083 }
1084
1085 drm_core_reclaim_buffers(dev, filp);
1086 }
1087
1088
1089 drm_ioctl_desc_t savage_ioctls[] = {
1090 [DRM_IOCTL_NR(DRM_SAVAGE_BCI_INIT)] = {savage_bci_init, 1, 1},
1091 [DRM_IOCTL_NR(DRM_SAVAGE_BCI_CMDBUF)] = {savage_bci_cmdbuf, 1, 0},
1092 [DRM_IOCTL_NR(DRM_SAVAGE_BCI_EVENT_EMIT)] = {savage_bci_event_emit, 1, 0},
1093 [DRM_IOCTL_NR(DRM_SAVAGE_BCI_EVENT_WAIT)] = {savage_bci_event_wait, 1, 0},
1094 };
1095
1096 int savage_max_ioctl = DRM_ARRAY_SIZE(savage_ioctls);
Linux kernel - Deliverables
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