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Linux 2.6.20.7
[linux/fpc-iii.git] / drivers / char / drm / savage_bci.c
blobb94fab55680940dd44688052e0987634ad3b9cc1
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 savage_do_cleanup_bci(drm_device_t *dev);
36
37 static int
38 savage_bci_wait_fifo_shadow(drm_savage_private_t * dev_priv, unsigned int n)
39 {
40 uint32_t mask = dev_priv->status_used_mask;
41 uint32_t threshold = dev_priv->bci_threshold_hi;
42 uint32_t status;
43 int i;
44
45 #if SAVAGE_BCI_DEBUG
46 if (n > dev_priv->cob_size + SAVAGE_BCI_FIFO_SIZE - threshold)
47 DRM_ERROR("Trying to emit %d words "
48 "(more than guaranteed space in COB)\n", n);
49 #endif
50
51 for (i = 0; i < SAVAGE_DEFAULT_USEC_TIMEOUT; i++) {
52 DRM_MEMORYBARRIER();
53 status = dev_priv->status_ptr[0];
54 if ((status & mask) < threshold)
55 return 0;
56 DRM_UDELAY(1);
57 }
58
59 #if SAVAGE_BCI_DEBUG
60 DRM_ERROR("failed!\n");
61 DRM_INFO(" status=0x%08x, threshold=0x%08x\n", status, threshold);
62 #endif
63 return DRM_ERR(EBUSY);
64 }
65
66 static int
67 savage_bci_wait_fifo_s3d(drm_savage_private_t * dev_priv, unsigned int n)
68 {
69 uint32_t maxUsed = dev_priv->cob_size + SAVAGE_BCI_FIFO_SIZE - n;
70 uint32_t status;
71 int i;
72
73 for (i = 0; i < SAVAGE_DEFAULT_USEC_TIMEOUT; i++) {
74 status = SAVAGE_READ(SAVAGE_STATUS_WORD0);
75 if ((status & SAVAGE_FIFO_USED_MASK_S3D) <= maxUsed)
76 return 0;
77 DRM_UDELAY(1);
78 }
79
80 #if SAVAGE_BCI_DEBUG
81 DRM_ERROR("failed!\n");
82 DRM_INFO(" status=0x%08x\n", status);
83 #endif
84 return DRM_ERR(EBUSY);
85 }
86
87 static int
88 savage_bci_wait_fifo_s4(drm_savage_private_t * dev_priv, unsigned int n)
89 {
90 uint32_t maxUsed = dev_priv->cob_size + SAVAGE_BCI_FIFO_SIZE - n;
91 uint32_t status;
92 int i;
93
94 for (i = 0; i < SAVAGE_DEFAULT_USEC_TIMEOUT; i++) {
95 status = SAVAGE_READ(SAVAGE_ALT_STATUS_WORD0);
96 if ((status & SAVAGE_FIFO_USED_MASK_S4) <= maxUsed)
97 return 0;
98 DRM_UDELAY(1);
99 }
100
101 #if SAVAGE_BCI_DEBUG
102 DRM_ERROR("failed!\n");
103 DRM_INFO(" status=0x%08x\n", status);
104 #endif
105 return DRM_ERR(EBUSY);
106 }
107
108 /*
109 * Waiting for events.
110 *
111 * The BIOSresets the event tag to 0 on mode changes. Therefore we
112 * never emit 0 to the event tag. If we find a 0 event tag we know the
113 * BIOS stomped on it and return success assuming that the BIOS waited
114 * for engine idle.
115 *
116 * Note: if the Xserver uses the event tag it has to follow the same
117 * rule. Otherwise there may be glitches every 2^16 events.
118 */
119 static int
120 savage_bci_wait_event_shadow(drm_savage_private_t * dev_priv, uint16_t e)
121 {
122 uint32_t status;
123 int i;
124
125 for (i = 0; i < SAVAGE_EVENT_USEC_TIMEOUT; i++) {
126 DRM_MEMORYBARRIER();
127 status = dev_priv->status_ptr[1];
128 if ((((status & 0xffff) - e) & 0xffff) <= 0x7fff ||
129 (status & 0xffff) == 0)
130 return 0;
131 DRM_UDELAY(1);
132 }
133
134 #if SAVAGE_BCI_DEBUG
135 DRM_ERROR("failed!\n");
136 DRM_INFO(" status=0x%08x, e=0x%04x\n", status, e);
137 #endif
138
139 return DRM_ERR(EBUSY);
140 }
141
142 static int
143 savage_bci_wait_event_reg(drm_savage_private_t * dev_priv, uint16_t e)
144 {
145 uint32_t status;
146 int i;
147
148 for (i = 0; i < SAVAGE_EVENT_USEC_TIMEOUT; i++) {
149 status = SAVAGE_READ(SAVAGE_STATUS_WORD1);
150 if ((((status & 0xffff) - e) & 0xffff) <= 0x7fff ||
151 (status & 0xffff) == 0)
152 return 0;
153 DRM_UDELAY(1);
154 }
155
156 #if SAVAGE_BCI_DEBUG
157 DRM_ERROR("failed!\n");
158 DRM_INFO(" status=0x%08x, e=0x%04x\n", status, e);
159 #endif
160
161 return DRM_ERR(EBUSY);
162 }
163
164 uint16_t savage_bci_emit_event(drm_savage_private_t * dev_priv,
165 unsigned int flags)
166 {
167 uint16_t count;
168 BCI_LOCALS;
169
170 if (dev_priv->status_ptr) {
171 /* coordinate with Xserver */
172 count = dev_priv->status_ptr[1023];
173 if (count < dev_priv->event_counter)
174 dev_priv->event_wrap++;
175 } else {
176 count = dev_priv->event_counter;
177 }
178 count = (count + 1) & 0xffff;
179 if (count == 0) {
180 count++; /* See the comment above savage_wait_event_*. */
181 dev_priv->event_wrap++;
182 }
183 dev_priv->event_counter = count;
184 if (dev_priv->status_ptr)
185 dev_priv->status_ptr[1023] = (uint32_t) count;
186
187 if ((flags & (SAVAGE_WAIT_2D | SAVAGE_WAIT_3D))) {
188 unsigned int wait_cmd = BCI_CMD_WAIT;
189 if ((flags & SAVAGE_WAIT_2D))
190 wait_cmd |= BCI_CMD_WAIT_2D;
191 if ((flags & SAVAGE_WAIT_3D))
192 wait_cmd |= BCI_CMD_WAIT_3D;
193 BEGIN_BCI(2);
194 BCI_WRITE(wait_cmd);
195 } else {
196 BEGIN_BCI(1);
197 }
198 BCI_WRITE(BCI_CMD_UPDATE_EVENT_TAG | (uint32_t) count);
199
200 return count;
201 }
202
203 /*
204 * Freelist management
205 */
206 static int savage_freelist_init(drm_device_t * dev)
207 {
208 drm_savage_private_t *dev_priv = dev->dev_private;
209 drm_device_dma_t *dma = dev->dma;
210 drm_buf_t *buf;
211 drm_savage_buf_priv_t *entry;
212 int i;
213 DRM_DEBUG("count=%d\n", dma->buf_count);
214
215 dev_priv->head.next = &dev_priv->tail;
216 dev_priv->head.prev = NULL;
217 dev_priv->head.buf = NULL;
218
219 dev_priv->tail.next = NULL;
220 dev_priv->tail.prev = &dev_priv->head;
221 dev_priv->tail.buf = NULL;
222
223 for (i = 0; i < dma->buf_count; i++) {
224 buf = dma->buflist[i];
225 entry = buf->dev_private;
226
227 SET_AGE(&entry->age, 0, 0);
228 entry->buf = buf;
229
230 entry->next = dev_priv->head.next;
231 entry->prev = &dev_priv->head;
232 dev_priv->head.next->prev = entry;
233 dev_priv->head.next = entry;
234 }
235
236 return 0;
237 }
238
239 static drm_buf_t *savage_freelist_get(drm_device_t * dev)
240 {
241 drm_savage_private_t *dev_priv = dev->dev_private;
242 drm_savage_buf_priv_t *tail = dev_priv->tail.prev;
243 uint16_t event;
244 unsigned int wrap;
245 DRM_DEBUG("\n");
246
247 UPDATE_EVENT_COUNTER();
248 if (dev_priv->status_ptr)
249 event = dev_priv->status_ptr[1] & 0xffff;
250 else
251 event = SAVAGE_READ(SAVAGE_STATUS_WORD1) & 0xffff;
252 wrap = dev_priv->event_wrap;
253 if (event > dev_priv->event_counter)
254 wrap--; /* hardware hasn't passed the last wrap yet */
255
256 DRM_DEBUG(" tail=0x%04x %d\n", tail->age.event, tail->age.wrap);
257 DRM_DEBUG(" head=0x%04x %d\n", event, wrap);
258
259 if (tail->buf && (TEST_AGE(&tail->age, event, wrap) || event == 0)) {
260 drm_savage_buf_priv_t *next = tail->next;
261 drm_savage_buf_priv_t *prev = tail->prev;
262 prev->next = next;
263 next->prev = prev;
264 tail->next = tail->prev = NULL;
265 return tail->buf;
266 }
267
268 DRM_DEBUG("returning NULL, tail->buf=%p!\n", tail->buf);
269 return NULL;
270 }
271
272 void savage_freelist_put(drm_device_t * dev, drm_buf_t * buf)
273 {
274 drm_savage_private_t *dev_priv = dev->dev_private;
275 drm_savage_buf_priv_t *entry = buf->dev_private, *prev, *next;
276
277 DRM_DEBUG("age=0x%04x wrap=%d\n", entry->age.event, entry->age.wrap);
278
279 if (entry->next != NULL || entry->prev != NULL) {
280 DRM_ERROR("entry already on freelist.\n");
281 return;
282 }
283
284 prev = &dev_priv->head;
285 next = prev->next;
286 prev->next = entry;
287 next->prev = entry;
288 entry->prev = prev;
289 entry->next = next;
290 }
291
292 /*
293 * Command DMA
294 */
295 static int savage_dma_init(drm_savage_private_t * dev_priv)
296 {
297 unsigned int i;
298
299 dev_priv->nr_dma_pages = dev_priv->cmd_dma->size /
300 (SAVAGE_DMA_PAGE_SIZE * 4);
301 dev_priv->dma_pages = drm_alloc(sizeof(drm_savage_dma_page_t) *
302 dev_priv->nr_dma_pages, DRM_MEM_DRIVER);
303 if (dev_priv->dma_pages == NULL)
304 return DRM_ERR(ENOMEM);
305
306 for (i = 0; i < dev_priv->nr_dma_pages; ++i) {
307 SET_AGE(&dev_priv->dma_pages[i].age, 0, 0);
308 dev_priv->dma_pages[i].used = 0;
309 dev_priv->dma_pages[i].flushed = 0;
310 }
311 SET_AGE(&dev_priv->last_dma_age, 0, 0);
312
313 dev_priv->first_dma_page = 0;
314 dev_priv->current_dma_page = 0;
315
316 return 0;
317 }
318
319 void savage_dma_reset(drm_savage_private_t * dev_priv)
320 {
321 uint16_t event;
322 unsigned int wrap, i;
323 event = savage_bci_emit_event(dev_priv, 0);
324 wrap = dev_priv->event_wrap;
325 for (i = 0; i < dev_priv->nr_dma_pages; ++i) {
326 SET_AGE(&dev_priv->dma_pages[i].age, event, wrap);
327 dev_priv->dma_pages[i].used = 0;
328 dev_priv->dma_pages[i].flushed = 0;
329 }
330 SET_AGE(&dev_priv->last_dma_age, event, wrap);
331 dev_priv->first_dma_page = dev_priv->current_dma_page = 0;
332 }
333
334 void savage_dma_wait(drm_savage_private_t * dev_priv, unsigned int page)
335 {
336 uint16_t event;
337 unsigned int wrap;
338
339 /* Faked DMA buffer pages don't age. */
340 if (dev_priv->cmd_dma == &dev_priv->fake_dma)
341 return;
342
343 UPDATE_EVENT_COUNTER();
344 if (dev_priv->status_ptr)
345 event = dev_priv->status_ptr[1] & 0xffff;
346 else
347 event = SAVAGE_READ(SAVAGE_STATUS_WORD1) & 0xffff;
348 wrap = dev_priv->event_wrap;
349 if (event > dev_priv->event_counter)
350 wrap--; /* hardware hasn't passed the last wrap yet */
351
352 if (dev_priv->dma_pages[page].age.wrap > wrap ||
353 (dev_priv->dma_pages[page].age.wrap == wrap &&
354 dev_priv->dma_pages[page].age.event > event)) {
355 if (dev_priv->wait_evnt(dev_priv,
356 dev_priv->dma_pages[page].age.event)
357 < 0)
358 DRM_ERROR("wait_evnt failed!\n");
359 }
360 }
361
362 uint32_t *savage_dma_alloc(drm_savage_private_t * dev_priv, unsigned int n)
363 {
364 unsigned int cur = dev_priv->current_dma_page;
365 unsigned int rest = SAVAGE_DMA_PAGE_SIZE -
366 dev_priv->dma_pages[cur].used;
367 unsigned int nr_pages = (n - rest + SAVAGE_DMA_PAGE_SIZE - 1) /
368 SAVAGE_DMA_PAGE_SIZE;
369 uint32_t *dma_ptr;
370 unsigned int i;
371
372 DRM_DEBUG("cur=%u, cur->used=%u, n=%u, rest=%u, nr_pages=%u\n",
373 cur, dev_priv->dma_pages[cur].used, n, rest, nr_pages);
374
375 if (cur + nr_pages < dev_priv->nr_dma_pages) {
376 dma_ptr = (uint32_t *) dev_priv->cmd_dma->handle +
377 cur * SAVAGE_DMA_PAGE_SIZE + 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 =
386 (n + SAVAGE_DMA_PAGE_SIZE - 1) / SAVAGE_DMA_PAGE_SIZE;
387 for (i = cur; i < dev_priv->nr_dma_pages; ++i) {
388 dev_priv->dma_pages[i].age = dev_priv->last_dma_age;
389 dev_priv->dma_pages[i].used = 0;
390 dev_priv->dma_pages[i].flushed = 0;
391 }
392 dma_ptr = (uint32_t *) dev_priv->cmd_dma->handle;
393 dev_priv->first_dma_page = cur = 0;
394 }
395 for (i = cur; nr_pages > 0; ++i, --nr_pages) {
396 #if SAVAGE_DMA_DEBUG
397 if (dev_priv->dma_pages[i].used) {
398 DRM_ERROR("unflushed page %u: used=%u\n",
399 i, dev_priv->dma_pages[i].used);
400 }
401 #endif
402 if (n > SAVAGE_DMA_PAGE_SIZE)
403 dev_priv->dma_pages[i].used = SAVAGE_DMA_PAGE_SIZE;
404 else
405 dev_priv->dma_pages[i].used = n;
406 n -= SAVAGE_DMA_PAGE_SIZE;
407 }
408 dev_priv->current_dma_page = --i;
409
410 DRM_DEBUG("cur=%u, cur->used=%u, n=%u\n",
411 i, dev_priv->dma_pages[i].used, n);
412
413 savage_dma_wait(dev_priv, dev_priv->current_dma_page);
414
415 return dma_ptr;
416 }
417
418 static void savage_dma_flush(drm_savage_private_t * dev_priv)
419 {
420 unsigned int first = dev_priv->first_dma_page;
421 unsigned int cur = dev_priv->current_dma_page;
422 uint16_t event;
423 unsigned int wrap, pad, align, len, i;
424 unsigned long phys_addr;
425 BCI_LOCALS;
426
427 if (first == cur &&
428 dev_priv->dma_pages[cur].used == dev_priv->dma_pages[cur].flushed)
429 return;
430
431 /* pad length to multiples of 2 entries
432 * align start of next DMA block to multiles of 8 entries */
433 pad = -dev_priv->dma_pages[cur].used & 1;
434 align = -(dev_priv->dma_pages[cur].used + pad) & 7;
435
436 DRM_DEBUG("first=%u, cur=%u, first->flushed=%u, cur->used=%u, "
437 "pad=%u, align=%u\n",
438 first, cur, dev_priv->dma_pages[first].flushed,
439 dev_priv->dma_pages[cur].used, pad, align);
440
441 /* pad with noops */
442 if (pad) {
443 uint32_t *dma_ptr = (uint32_t *) dev_priv->cmd_dma->handle +
444 cur * SAVAGE_DMA_PAGE_SIZE + 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 - dev_priv->dma_pages[first].flushed;
460
461 DRM_DEBUG("phys_addr=%lx, len=%u\n",
462 phys_addr | dev_priv->dma_type, len);
463
464 BEGIN_BCI(3);
465 BCI_SET_REGISTERS(SAVAGE_DMABUFADDR, 1);
466 BCI_WRITE(phys_addr | dev_priv->dma_type);
467 BCI_DMA(len);
468
469 /* fix alignment of the start of the next block */
470 dev_priv->dma_pages[cur].used += align;
471
472 /* age DMA pages */
473 event = savage_bci_emit_event(dev_priv, 0);
474 wrap = dev_priv->event_wrap;
475 for (i = first; i < cur; ++i) {
476 SET_AGE(&dev_priv->dma_pages[i].age, event, wrap);
477 dev_priv->dma_pages[i].used = 0;
478 dev_priv->dma_pages[i].flushed = 0;
479 }
480 /* age the current page only when it's full */
481 if (dev_priv->dma_pages[cur].used == SAVAGE_DMA_PAGE_SIZE) {
482 SET_AGE(&dev_priv->dma_pages[cur].age, event, wrap);
483 dev_priv->dma_pages[cur].used = 0;
484 dev_priv->dma_pages[cur].flushed = 0;
485 /* advance to next page */
486 cur++;
487 if (cur == dev_priv->nr_dma_pages)
488 cur = 0;
489 dev_priv->first_dma_page = dev_priv->current_dma_page = cur;
490 } else {
491 dev_priv->first_dma_page = cur;
492 dev_priv->dma_pages[cur].flushed = dev_priv->dma_pages[i].used;
493 }
494 SET_AGE(&dev_priv->last_dma_age, event, wrap);
495
496 DRM_DEBUG("first=cur=%u, cur->used=%u, cur->flushed=%u\n", cur,
497 dev_priv->dma_pages[cur].used,
498 dev_priv->dma_pages[cur].flushed);
499 }
500
501 static void savage_fake_dma_flush(drm_savage_private_t * dev_priv)
502 {
503 unsigned int i, j;
504 BCI_LOCALS;
505
506 if (dev_priv->first_dma_page == dev_priv->current_dma_page &&
507 dev_priv->dma_pages[dev_priv->current_dma_page].used == 0)
508 return;
509
510 DRM_DEBUG("first=%u, cur=%u, cur->used=%u\n",
511 dev_priv->first_dma_page, dev_priv->current_dma_page,
512 dev_priv->dma_pages[dev_priv->current_dma_page].used);
513
514 for (i = dev_priv->first_dma_page;
515 i <= dev_priv->current_dma_page && dev_priv->dma_pages[i].used;
516 ++i) {
517 uint32_t *dma_ptr = (uint32_t *) dev_priv->cmd_dma->handle +
518 i * SAVAGE_DMA_PAGE_SIZE;
519 #if SAVAGE_DMA_DEBUG
520 /* Sanity check: all pages except the last one must be full. */
521 if (i < dev_priv->current_dma_page &&
522 dev_priv->dma_pages[i].used != SAVAGE_DMA_PAGE_SIZE) {
523 DRM_ERROR("partial DMA page %u: used=%u",
524 i, dev_priv->dma_pages[i].used);
525 }
526 #endif
527 BEGIN_BCI(dev_priv->dma_pages[i].used);
528 for (j = 0; j < dev_priv->dma_pages[i].used; ++j) {
529 BCI_WRITE(dma_ptr[j]);
530 }
531 dev_priv->dma_pages[i].used = 0;
532 }
533
534 /* reset to first page */
535 dev_priv->first_dma_page = dev_priv->current_dma_page = 0;
536 }
537
538 int savage_driver_load(drm_device_t *dev, unsigned long chipset)
539 {
540 drm_savage_private_t *dev_priv;
541
542 dev_priv = drm_alloc(sizeof(drm_savage_private_t), DRM_MEM_DRIVER);
543 if (dev_priv == NULL)
544 return DRM_ERR(ENOMEM);
545
546 memset(dev_priv, 0, sizeof(drm_savage_private_t));
547 dev->dev_private = (void *)dev_priv;
548
549 dev_priv->chipset = (enum savage_family)chipset;
550
551 return 0;
552 }
553
554
555 /*
556 * Initalize mappings. On Savage4 and SavageIX the alignment
557 * and size of the aperture is not suitable for automatic MTRR setup
558 * in drm_addmap. Therefore we add them manually before the maps are
559 * initialized, and tear them down on last close.
560 */
561 int savage_driver_firstopen(drm_device_t *dev)
562 {
563 drm_savage_private_t *dev_priv = dev->dev_private;
564 unsigned long mmio_base, fb_base, fb_size, aperture_base;
565 /* fb_rsrc and aper_rsrc aren't really used currently, but still exist
566 * in case we decide we need information on the BAR for BSD in the
567 * future.
568 */
569 unsigned int fb_rsrc, aper_rsrc;
570 int ret = 0;
571
572 dev_priv->mtrr[0].handle = -1;
573 dev_priv->mtrr[1].handle = -1;
574 dev_priv->mtrr[2].handle = -1;
575 if (S3_SAVAGE3D_SERIES(dev_priv->chipset)) {
576 fb_rsrc = 0;
577 fb_base = drm_get_resource_start(dev, 0);
578 fb_size = SAVAGE_FB_SIZE_S3;
579 mmio_base = fb_base + SAVAGE_FB_SIZE_S3;
580 aper_rsrc = 0;
581 aperture_base = fb_base + SAVAGE_APERTURE_OFFSET;
582 /* this should always be true */
583 if (drm_get_resource_len(dev, 0) == 0x08000000) {
584 /* Don't make MMIO write-cobining! We need 3
585 * MTRRs. */
586 dev_priv->mtrr[0].base = fb_base;
587 dev_priv->mtrr[0].size = 0x01000000;
588 dev_priv->mtrr[0].handle =
589 drm_mtrr_add(dev_priv->mtrr[0].base,
590 dev_priv->mtrr[0].size, DRM_MTRR_WC);
591 dev_priv->mtrr[1].base = fb_base + 0x02000000;
592 dev_priv->mtrr[1].size = 0x02000000;
593 dev_priv->mtrr[1].handle =
594 drm_mtrr_add(dev_priv->mtrr[1].base,
595 dev_priv->mtrr[1].size, DRM_MTRR_WC);
596 dev_priv->mtrr[2].base = fb_base + 0x04000000;
597 dev_priv->mtrr[2].size = 0x04000000;
598 dev_priv->mtrr[2].handle =
599 drm_mtrr_add(dev_priv->mtrr[2].base,
600 dev_priv->mtrr[2].size, DRM_MTRR_WC);
601 } else {
602 DRM_ERROR("strange pci_resource_len %08lx\n",
603 drm_get_resource_len(dev, 0));
604 }
605 } else if (dev_priv->chipset != S3_SUPERSAVAGE &&
606 dev_priv->chipset != S3_SAVAGE2000) {
607 mmio_base = drm_get_resource_start(dev, 0);
608 fb_rsrc = 1;
609 fb_base = drm_get_resource_start(dev, 1);
610 fb_size = SAVAGE_FB_SIZE_S4;
611 aper_rsrc = 1;
612 aperture_base = fb_base + SAVAGE_APERTURE_OFFSET;
613 /* this should always be true */
614 if (drm_get_resource_len(dev, 1) == 0x08000000) {
615 /* Can use one MTRR to cover both fb and
616 * aperture. */
617 dev_priv->mtrr[0].base = fb_base;
618 dev_priv->mtrr[0].size = 0x08000000;
619 dev_priv->mtrr[0].handle =
620 drm_mtrr_add(dev_priv->mtrr[0].base,
621 dev_priv->mtrr[0].size, DRM_MTRR_WC);
622 } else {
623 DRM_ERROR("strange pci_resource_len %08lx\n",
624 drm_get_resource_len(dev, 1));
625 }
626 } else {
627 mmio_base = drm_get_resource_start(dev, 0);
628 fb_rsrc = 1;
629 fb_base = drm_get_resource_start(dev, 1);
630 fb_size = drm_get_resource_len(dev, 1);
631 aper_rsrc = 2;
632 aperture_base = drm_get_resource_start(dev, 2);
633 /* Automatic MTRR setup will do the right thing. */
634 }
635
636 ret = drm_addmap(dev, mmio_base, SAVAGE_MMIO_SIZE, _DRM_REGISTERS,
637 _DRM_READ_ONLY, &dev_priv->mmio);
638 if (ret)
639 return ret;
640
641 ret = drm_addmap(dev, fb_base, fb_size, _DRM_FRAME_BUFFER,
642 _DRM_WRITE_COMBINING, &dev_priv->fb);
643 if (ret)
644 return ret;
645
646 ret = drm_addmap(dev, aperture_base, SAVAGE_APERTURE_SIZE,
647 _DRM_FRAME_BUFFER, _DRM_WRITE_COMBINING,
648 &dev_priv->aperture);
649 if (ret)
650 return ret;
651
652 return ret;
653 }
654
655 /*
656 * Delete MTRRs and free device-private data.
657 */
658 void savage_driver_lastclose(drm_device_t *dev)
659 {
660 drm_savage_private_t *dev_priv = dev->dev_private;
661 int i;
662
663 for (i = 0; i < 3; ++i)
664 if (dev_priv->mtrr[i].handle >= 0)
665 drm_mtrr_del(dev_priv->mtrr[i].handle,
666 dev_priv->mtrr[i].base,
667 dev_priv->mtrr[i].size, DRM_MTRR_WC);
668 }
669
670 int savage_driver_unload(drm_device_t *dev)
671 {
672 drm_savage_private_t *dev_priv = dev->dev_private;
673
674 drm_free(dev_priv, sizeof(drm_savage_private_t), DRM_MEM_DRIVER);
675
676 return 0;
677 }
678
679 static int savage_do_init_bci(drm_device_t * dev, drm_savage_init_t * init)
680 {
681 drm_savage_private_t *dev_priv = dev->dev_private;
682
683 if (init->fb_bpp != 16 && init->fb_bpp != 32) {
684 DRM_ERROR("invalid frame buffer bpp %d!\n", init->fb_bpp);
685 return DRM_ERR(EINVAL);
686 }
687 if (init->depth_bpp != 16 && init->depth_bpp != 32) {
688 DRM_ERROR("invalid depth buffer bpp %d!\n", init->fb_bpp);
689 return DRM_ERR(EINVAL);
690 }
691 if (init->dma_type != SAVAGE_DMA_AGP &&
692 init->dma_type != SAVAGE_DMA_PCI) {
693 DRM_ERROR("invalid dma memory type %d!\n", init->dma_type);
694 return DRM_ERR(EINVAL);
695 }
696
697 dev_priv->cob_size = init->cob_size;
698 dev_priv->bci_threshold_lo = init->bci_threshold_lo;
699 dev_priv->bci_threshold_hi = init->bci_threshold_hi;
700 dev_priv->dma_type = init->dma_type;
701
702 dev_priv->fb_bpp = init->fb_bpp;
703 dev_priv->front_offset = init->front_offset;
704 dev_priv->front_pitch = init->front_pitch;
705 dev_priv->back_offset = init->back_offset;
706 dev_priv->back_pitch = init->back_pitch;
707 dev_priv->depth_bpp = init->depth_bpp;
708 dev_priv->depth_offset = init->depth_offset;
709 dev_priv->depth_pitch = init->depth_pitch;
710
711 dev_priv->texture_offset = init->texture_offset;
712 dev_priv->texture_size = init->texture_size;
713
714 DRM_GETSAREA();
715 if (!dev_priv->sarea) {
716 DRM_ERROR("could not find sarea!\n");
717 savage_do_cleanup_bci(dev);
718 return DRM_ERR(EINVAL);
719 }
720 if (init->status_offset != 0) {
721 dev_priv->status = drm_core_findmap(dev, init->status_offset);
722 if (!dev_priv->status) {
723 DRM_ERROR("could not find shadow status region!\n");
724 savage_do_cleanup_bci(dev);
725 return DRM_ERR(EINVAL);
726 }
727 } else {
728 dev_priv->status = NULL;
729 }
730 if (dev_priv->dma_type == SAVAGE_DMA_AGP && init->buffers_offset) {
731 dev->agp_buffer_token = init->buffers_offset;
732 dev->agp_buffer_map = drm_core_findmap(dev,
733 init->buffers_offset);
734 if (!dev->agp_buffer_map) {
735 DRM_ERROR("could not find DMA buffer region!\n");
736 savage_do_cleanup_bci(dev);
737 return DRM_ERR(EINVAL);
738 }
739 drm_core_ioremap(dev->agp_buffer_map, dev);
740 if (!dev->agp_buffer_map) {
741 DRM_ERROR("failed to ioremap DMA buffer region!\n");
742 savage_do_cleanup_bci(dev);
743 return DRM_ERR(ENOMEM);
744 }
745 }
746 if (init->agp_textures_offset) {
747 dev_priv->agp_textures =
748 drm_core_findmap(dev, init->agp_textures_offset);
749 if (!dev_priv->agp_textures) {
750 DRM_ERROR("could not find agp texture region!\n");
751 savage_do_cleanup_bci(dev);
752 return DRM_ERR(EINVAL);
753 }
754 } else {
755 dev_priv->agp_textures = NULL;
756 }
757
758 if (init->cmd_dma_offset) {
759 if (S3_SAVAGE3D_SERIES(dev_priv->chipset)) {
760 DRM_ERROR("command DMA not supported on "
761 "Savage3D/MX/IX.\n");
762 savage_do_cleanup_bci(dev);
763 return DRM_ERR(EINVAL);
764 }
765 if (dev->dma && dev->dma->buflist) {
766 DRM_ERROR("command and vertex DMA not supported "
767 "at the same time.\n");
768 savage_do_cleanup_bci(dev);
769 return DRM_ERR(EINVAL);
770 }
771 dev_priv->cmd_dma = drm_core_findmap(dev, init->cmd_dma_offset);
772 if (!dev_priv->cmd_dma) {
773 DRM_ERROR("could not find command DMA region!\n");
774 savage_do_cleanup_bci(dev);
775 return DRM_ERR(EINVAL);
776 }
777 if (dev_priv->dma_type == SAVAGE_DMA_AGP) {
778 if (dev_priv->cmd_dma->type != _DRM_AGP) {
779 DRM_ERROR("AGP command DMA region is not a "
780 "_DRM_AGP map!\n");
781 savage_do_cleanup_bci(dev);
782 return DRM_ERR(EINVAL);
783 }
784 drm_core_ioremap(dev_priv->cmd_dma, dev);
785 if (!dev_priv->cmd_dma->handle) {
786 DRM_ERROR("failed to ioremap command "
787 "DMA region!\n");
788 savage_do_cleanup_bci(dev);
789 return DRM_ERR(ENOMEM);
790 }
791 } else if (dev_priv->cmd_dma->type != _DRM_CONSISTENT) {
792 DRM_ERROR("PCI command DMA region is not a "
793 "_DRM_CONSISTENT map!\n");
794 savage_do_cleanup_bci(dev);
795 return DRM_ERR(EINVAL);
796 }
797 } else {
798 dev_priv->cmd_dma = NULL;
799 }
800
801 dev_priv->dma_flush = savage_dma_flush;
802 if (!dev_priv->cmd_dma) {
803 DRM_DEBUG("falling back to faked command DMA.\n");
804 dev_priv->fake_dma.offset = 0;
805 dev_priv->fake_dma.size = SAVAGE_FAKE_DMA_SIZE;
806 dev_priv->fake_dma.type = _DRM_SHM;
807 dev_priv->fake_dma.handle = drm_alloc(SAVAGE_FAKE_DMA_SIZE,
808 DRM_MEM_DRIVER);
809 if (!dev_priv->fake_dma.handle) {
810 DRM_ERROR("could not allocate faked DMA buffer!\n");
811 savage_do_cleanup_bci(dev);
812 return DRM_ERR(ENOMEM);
813 }
814 dev_priv->cmd_dma = &dev_priv->fake_dma;
815 dev_priv->dma_flush = savage_fake_dma_flush;
816 }
817
818 dev_priv->sarea_priv =
819 (drm_savage_sarea_t *) ((uint8_t *) dev_priv->sarea->handle +
820 init->sarea_priv_offset);
821
822 /* setup bitmap descriptors */
823 {
824 unsigned int color_tile_format;
825 unsigned int depth_tile_format;
826 unsigned int front_stride, back_stride, depth_stride;
827 if (dev_priv->chipset <= S3_SAVAGE4) {
828 color_tile_format = dev_priv->fb_bpp == 16 ?
829 SAVAGE_BD_TILE_16BPP : SAVAGE_BD_TILE_32BPP;
830 depth_tile_format = dev_priv->depth_bpp == 16 ?
831 SAVAGE_BD_TILE_16BPP : SAVAGE_BD_TILE_32BPP;
832 } else {
833 color_tile_format = SAVAGE_BD_TILE_DEST;
834 depth_tile_format = SAVAGE_BD_TILE_DEST;
835 }
836 front_stride = dev_priv->front_pitch / (dev_priv->fb_bpp / 8);
837 back_stride = dev_priv->back_pitch / (dev_priv->fb_bpp / 8);
838 depth_stride =
839 dev_priv->depth_pitch / (dev_priv->depth_bpp / 8);
840
841 dev_priv->front_bd = front_stride | SAVAGE_BD_BW_DISABLE |
842 (dev_priv->fb_bpp << SAVAGE_BD_BPP_SHIFT) |
843 (color_tile_format << SAVAGE_BD_TILE_SHIFT);
844
845 dev_priv->back_bd = back_stride | SAVAGE_BD_BW_DISABLE |
846 (dev_priv->fb_bpp << SAVAGE_BD_BPP_SHIFT) |
847 (color_tile_format << SAVAGE_BD_TILE_SHIFT);
848
849 dev_priv->depth_bd = depth_stride | SAVAGE_BD_BW_DISABLE |
850 (dev_priv->depth_bpp << SAVAGE_BD_BPP_SHIFT) |
851 (depth_tile_format << SAVAGE_BD_TILE_SHIFT);
852 }
853
854 /* setup status and bci ptr */
855 dev_priv->event_counter = 0;
856 dev_priv->event_wrap = 0;
857 dev_priv->bci_ptr = (volatile uint32_t *)
858 ((uint8_t *) dev_priv->mmio->handle + SAVAGE_BCI_OFFSET);
859 if (S3_SAVAGE3D_SERIES(dev_priv->chipset)) {
860 dev_priv->status_used_mask = SAVAGE_FIFO_USED_MASK_S3D;
861 } else {
862 dev_priv->status_used_mask = SAVAGE_FIFO_USED_MASK_S4;
863 }
864 if (dev_priv->status != NULL) {
865 dev_priv->status_ptr =
866 (volatile uint32_t *)dev_priv->status->handle;
867 dev_priv->wait_fifo = savage_bci_wait_fifo_shadow;
868 dev_priv->wait_evnt = savage_bci_wait_event_shadow;
869 dev_priv->status_ptr[1023] = dev_priv->event_counter;
870 } else {
871 dev_priv->status_ptr = NULL;
872 if (S3_SAVAGE3D_SERIES(dev_priv->chipset)) {
873 dev_priv->wait_fifo = savage_bci_wait_fifo_s3d;
874 } else {
875 dev_priv->wait_fifo = savage_bci_wait_fifo_s4;
876 }
877 dev_priv->wait_evnt = savage_bci_wait_event_reg;
878 }
879
880 /* cliprect functions */
881 if (S3_SAVAGE3D_SERIES(dev_priv->chipset))
882 dev_priv->emit_clip_rect = savage_emit_clip_rect_s3d;
883 else
884 dev_priv->emit_clip_rect = savage_emit_clip_rect_s4;
885
886 if (savage_freelist_init(dev) < 0) {
887 DRM_ERROR("could not initialize freelist\n");
888 savage_do_cleanup_bci(dev);
889 return DRM_ERR(ENOMEM);
890 }
891
892 if (savage_dma_init(dev_priv) < 0) {
893 DRM_ERROR("could not initialize command DMA\n");
894 savage_do_cleanup_bci(dev);
895 return DRM_ERR(ENOMEM);
896 }
897
898 return 0;
899 }
900
901 static int savage_do_cleanup_bci(drm_device_t * dev)
902 {
903 drm_savage_private_t *dev_priv = dev->dev_private;
904
905 if (dev_priv->cmd_dma == &dev_priv->fake_dma) {
906 if (dev_priv->fake_dma.handle)
907 drm_free(dev_priv->fake_dma.handle,
908 SAVAGE_FAKE_DMA_SIZE, DRM_MEM_DRIVER);
909 } else if (dev_priv->cmd_dma && dev_priv->cmd_dma->handle &&
910 dev_priv->cmd_dma->type == _DRM_AGP &&
911 dev_priv->dma_type == SAVAGE_DMA_AGP)
912 drm_core_ioremapfree(dev_priv->cmd_dma, dev);
913
914 if (dev_priv->dma_type == SAVAGE_DMA_AGP &&
915 dev->agp_buffer_map && dev->agp_buffer_map->handle) {
916 drm_core_ioremapfree(dev->agp_buffer_map, dev);
917 /* make sure the next instance (which may be running
918 * in PCI mode) doesn't try to use an old
919 * agp_buffer_map. */
920 dev->agp_buffer_map = NULL;
921 }
922
923 if (dev_priv->dma_pages)
924 drm_free(dev_priv->dma_pages,
925 sizeof(drm_savage_dma_page_t) * dev_priv->nr_dma_pages,
926 DRM_MEM_DRIVER);
927
928 return 0;
929 }
930
931 static int savage_bci_init(DRM_IOCTL_ARGS)
932 {
933 DRM_DEVICE;
934 drm_savage_init_t init;
935
936 LOCK_TEST_WITH_RETURN(dev, filp);
937
938 DRM_COPY_FROM_USER_IOCTL(init, (drm_savage_init_t __user *) data,
939 sizeof(init));
940
941 switch (init.func) {
942 case SAVAGE_INIT_BCI:
943 return savage_do_init_bci(dev, &init);
944 case SAVAGE_CLEANUP_BCI:
945 return savage_do_cleanup_bci(dev);
946 }
947
948 return DRM_ERR(EINVAL);
949 }
950
951 static int savage_bci_event_emit(DRM_IOCTL_ARGS)
952 {
953 DRM_DEVICE;
954 drm_savage_private_t *dev_priv = dev->dev_private;
955 drm_savage_event_emit_t event;
956
957 DRM_DEBUG("\n");
958
959 LOCK_TEST_WITH_RETURN(dev, filp);
960
961 DRM_COPY_FROM_USER_IOCTL(event, (drm_savage_event_emit_t __user *) data,
962 sizeof(event));
963
964 event.count = savage_bci_emit_event(dev_priv, event.flags);
965 event.count |= dev_priv->event_wrap << 16;
966 DRM_COPY_TO_USER_IOCTL((drm_savage_event_emit_t __user *) data,
967 event, sizeof(event));
968 return 0;
969 }
970
971 static int savage_bci_event_wait(DRM_IOCTL_ARGS)
972 {
973 DRM_DEVICE;
974 drm_savage_private_t *dev_priv = dev->dev_private;
975 drm_savage_event_wait_t event;
976 unsigned int event_e, hw_e;
977 unsigned int event_w, hw_w;
978
979 DRM_DEBUG("\n");
980
981 DRM_COPY_FROM_USER_IOCTL(event, (drm_savage_event_wait_t __user *) data,
982 sizeof(event));
983
984 UPDATE_EVENT_COUNTER();
985 if (dev_priv->status_ptr)
986 hw_e = dev_priv->status_ptr[1] & 0xffff;
987 else
988 hw_e = SAVAGE_READ(SAVAGE_STATUS_WORD1) & 0xffff;
989 hw_w = dev_priv->event_wrap;
990 if (hw_e > dev_priv->event_counter)
991 hw_w--; /* hardware hasn't passed the last wrap yet */
992
993 event_e = event.count & 0xffff;
994 event_w = event.count >> 16;
995
996 /* Don't need to wait if
997 * - event counter wrapped since the event was emitted or
998 * - the hardware has advanced up to or over the event to wait for.
999 */
1000 if (event_w < hw_w || (event_w == hw_w && event_e <= hw_e))
1001 return 0;
1002 else
1003 return dev_priv->wait_evnt(dev_priv, event_e);
1004 }
1005
1006 /*
1007 * DMA buffer management
1008 */
1009
1010 static int savage_bci_get_buffers(DRMFILE filp, drm_device_t *dev, drm_dma_t *d)
1011 {
1012 drm_buf_t *buf;
1013 int i;
1014
1015 for (i = d->granted_count; i < d->request_count; i++) {
1016 buf = savage_freelist_get(dev);
1017 if (!buf)
1018 return DRM_ERR(EAGAIN);
1019
1020 buf->filp = filp;
1021
1022 if (DRM_COPY_TO_USER(&d->request_indices[i],
1023 &buf->idx, sizeof(buf->idx)))
1024 return DRM_ERR(EFAULT);
1025 if (DRM_COPY_TO_USER(&d->request_sizes[i],
1026 &buf->total, sizeof(buf->total)))
1027 return DRM_ERR(EFAULT);
1028
1029 d->granted_count++;
1030 }
1031 return 0;
1032 }
1033
1034 int savage_bci_buffers(DRM_IOCTL_ARGS)
1035 {
1036 DRM_DEVICE;
1037 drm_device_dma_t *dma = dev->dma;
1038 drm_dma_t d;
1039 int ret = 0;
1040
1041 LOCK_TEST_WITH_RETURN(dev, filp);
1042
1043 DRM_COPY_FROM_USER_IOCTL(d, (drm_dma_t __user *) data, sizeof(d));
1044
1045 /* Please don't send us buffers.
1046 */
1047 if (d.send_count != 0) {
1048 DRM_ERROR("Process %d trying to send %d buffers via drmDMA\n",
1049 DRM_CURRENTPID, d.send_count);
1050 return DRM_ERR(EINVAL);
1051 }
1052
1053 /* We'll send you buffers.
1054 */
1055 if (d.request_count < 0 || d.request_count > dma->buf_count) {
1056 DRM_ERROR("Process %d trying to get %d buffers (of %d max)\n",
1057 DRM_CURRENTPID, d.request_count, dma->buf_count);
1058 return DRM_ERR(EINVAL);
1059 }
1060
1061 d.granted_count = 0;
1062
1063 if (d.request_count) {
1064 ret = savage_bci_get_buffers(filp, dev, &d);
1065 }
1066
1067 DRM_COPY_TO_USER_IOCTL((drm_dma_t __user *) data, d, sizeof(d));
1068
1069 return ret;
1070 }
1071
1072 void savage_reclaim_buffers(drm_device_t *dev, DRMFILE filp)
1073 {
1074 drm_device_dma_t *dma = dev->dma;
1075 drm_savage_private_t *dev_priv = dev->dev_private;
1076 int i;
1077
1078 if (!dma)
1079 return;
1080 if (!dev_priv)
1081 return;
1082 if (!dma->buflist)
1083 return;
1084
1085 /*i830_flush_queue(dev); */
1086
1087 for (i = 0; i < dma->buf_count; i++) {
1088 drm_buf_t *buf = dma->buflist[i];
1089 drm_savage_buf_priv_t *buf_priv = buf->dev_private;
1090
1091 if (buf->filp == filp && buf_priv &&
1092 buf_priv->next == NULL && buf_priv->prev == NULL) {
1093 uint16_t event;
1094 DRM_DEBUG("reclaimed from client\n");
1095 event = savage_bci_emit_event(dev_priv, SAVAGE_WAIT_3D);
1096 SET_AGE(&buf_priv->age, event, dev_priv->event_wrap);
1097 savage_freelist_put(dev, buf);
1098 }
1099 }
1100
1101 drm_core_reclaim_buffers(dev, filp);
1102 }
1103
1104 drm_ioctl_desc_t savage_ioctls[] = {
1105 [DRM_IOCTL_NR(DRM_SAVAGE_BCI_INIT)] = {savage_bci_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
1106 [DRM_IOCTL_NR(DRM_SAVAGE_BCI_CMDBUF)] = {savage_bci_cmdbuf, DRM_AUTH},
1107 [DRM_IOCTL_NR(DRM_SAVAGE_BCI_EVENT_EMIT)] = {savage_bci_event_emit, DRM_AUTH},
1108 [DRM_IOCTL_NR(DRM_SAVAGE_BCI_EVENT_WAIT)] = {savage_bci_event_wait, DRM_AUTH},
1109 };
1110
1111 int savage_max_ioctl = DRM_ARRAY_SIZE(savage_ioctls);
Linux with added FPC-III support