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e1000 - Literally import e1000 driver from FreeBSD
[dragonfly.git] / sys / dev / drm / savage_bci.c
blob9dcf4f768bf8107f725d704155caa309ac51a172
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
26 #include "dev/drm/drmP.h"
27 #include "dev/drm/savage_drm.h"
28 #include "dev/drm/savage_drv.h"
29
30 /* Need a long timeout for shadow status updates can take a while
31 * and so can waiting for events when the queue is full. */
32 #define SAVAGE_DEFAULT_USEC_TIMEOUT 1000000 /* 1s */
33 #define SAVAGE_EVENT_USEC_TIMEOUT 5000000 /* 5s */
34 #define SAVAGE_FREELIST_DEBUG 0
35
36 static int savage_do_cleanup_bci(struct drm_device *dev);
37
38 static int
39 savage_bci_wait_fifo_shadow(drm_savage_private_t *dev_priv, unsigned int n)
40 {
41 uint32_t mask = dev_priv->status_used_mask;
42 uint32_t threshold = dev_priv->bci_threshold_hi;
43 uint32_t status;
44 int i;
45
46 #if SAVAGE_BCI_DEBUG
47 if (n > dev_priv->cob_size + SAVAGE_BCI_FIFO_SIZE - threshold)
48 DRM_ERROR("Trying to emit %d words "
49 "(more than guaranteed space in COB)\n", n);
50 #endif
51
52 for (i = 0; i < SAVAGE_DEFAULT_USEC_TIMEOUT; i++) {
53 DRM_MEMORYBARRIER();
54 status = dev_priv->status_ptr[0];
55 if ((status & mask) < threshold)
56 return 0;
57 DRM_UDELAY(1);
58 }
59
60 #if SAVAGE_BCI_DEBUG
61 DRM_ERROR("failed!\n");
62 DRM_INFO(" status=0x%08x, threshold=0x%08x\n", status, threshold);
63 #endif
64 return -EBUSY;
65 }
66
67 static int
68 savage_bci_wait_fifo_s3d(drm_savage_private_t *dev_priv, unsigned int n)
69 {
70 uint32_t maxUsed = dev_priv->cob_size + SAVAGE_BCI_FIFO_SIZE - n;
71 uint32_t status;
72 int i;
73
74 for (i = 0; i < SAVAGE_DEFAULT_USEC_TIMEOUT; i++) {
75 status = SAVAGE_READ(SAVAGE_STATUS_WORD0);
76 if ((status & SAVAGE_FIFO_USED_MASK_S3D) <= maxUsed)
77 return 0;
78 DRM_UDELAY(1);
79 }
80
81 #if SAVAGE_BCI_DEBUG
82 DRM_ERROR("failed!\n");
83 DRM_INFO(" status=0x%08x\n", status);
84 #endif
85 return -EBUSY;
86 }
87
88 static int
89 savage_bci_wait_fifo_s4(drm_savage_private_t *dev_priv, unsigned int n)
90 {
91 uint32_t maxUsed = dev_priv->cob_size + SAVAGE_BCI_FIFO_SIZE - n;
92 uint32_t status;
93 int i;
94
95 for (i = 0; i < SAVAGE_DEFAULT_USEC_TIMEOUT; i++) {
96 status = SAVAGE_READ(SAVAGE_ALT_STATUS_WORD0);
97 if ((status & SAVAGE_FIFO_USED_MASK_S4) <= maxUsed)
98 return 0;
99 DRM_UDELAY(1);
100 }
101
102 #if SAVAGE_BCI_DEBUG
103 DRM_ERROR("failed!\n");
104 DRM_INFO(" status=0x%08x\n", status);
105 #endif
106 return -EBUSY;
107 }
108
109 /*
110 * Waiting for events.
111 *
112 * The BIOSresets the event tag to 0 on mode changes. Therefore we
113 * never emit 0 to the event tag. If we find a 0 event tag we know the
114 * BIOS stomped on it and return success assuming that the BIOS waited
115 * for engine idle.
116 *
117 * Note: if the Xserver uses the event tag it has to follow the same
118 * rule. Otherwise there may be glitches every 2^16 events.
119 */
120 static int
121 savage_bci_wait_event_shadow(drm_savage_private_t *dev_priv, uint16_t e)
122 {
123 uint32_t status;
124 int i;
125
126 for (i = 0; i < SAVAGE_EVENT_USEC_TIMEOUT; i++) {
127 DRM_MEMORYBARRIER();
128 status = dev_priv->status_ptr[1];
129 if ((((status & 0xffff) - e) & 0xffff) <= 0x7fff ||
130 (status & 0xffff) == 0)
131 return 0;
132 DRM_UDELAY(1);
133 }
134
135 #if SAVAGE_BCI_DEBUG
136 DRM_ERROR("failed!\n");
137 DRM_INFO(" status=0x%08x, e=0x%04x\n", status, e);
138 #endif
139
140 return -EBUSY;
141 }
142
143 static int
144 savage_bci_wait_event_reg(drm_savage_private_t *dev_priv, uint16_t e)
145 {
146 uint32_t status;
147 int i;
148
149 for (i = 0; i < SAVAGE_EVENT_USEC_TIMEOUT; i++) {
150 status = SAVAGE_READ(SAVAGE_STATUS_WORD1);
151 if ((((status & 0xffff) - e) & 0xffff) <= 0x7fff ||
152 (status & 0xffff) == 0)
153 return 0;
154 DRM_UDELAY(1);
155 }
156
157 #if SAVAGE_BCI_DEBUG
158 DRM_ERROR("failed!\n");
159 DRM_INFO(" status=0x%08x, e=0x%04x\n", status, e);
160 #endif
161
162 return -EBUSY;
163 }
164
165 uint16_t savage_bci_emit_event(drm_savage_private_t *dev_priv,
166 unsigned int flags)
167 {
168 uint16_t count;
169 BCI_LOCALS;
170
171 if (dev_priv->status_ptr) {
172 /* coordinate with Xserver */
173 count = dev_priv->status_ptr[1023];
174 if (count < dev_priv->event_counter)
175 dev_priv->event_wrap++;
176 } else {
177 count = dev_priv->event_counter;
178 }
179 count = (count + 1) & 0xffff;
180 if (count == 0) {
181 count++; /* See the comment above savage_wait_event_*. */
182 dev_priv->event_wrap++;
183 }
184 dev_priv->event_counter = count;
185 if (dev_priv->status_ptr)
186 dev_priv->status_ptr[1023] = (uint32_t)count;
187
188 if ((flags & (SAVAGE_WAIT_2D | SAVAGE_WAIT_3D))) {
189 unsigned int wait_cmd = BCI_CMD_WAIT;
190 if ((flags & SAVAGE_WAIT_2D))
191 wait_cmd |= BCI_CMD_WAIT_2D;
192 if ((flags & SAVAGE_WAIT_3D))
193 wait_cmd |= BCI_CMD_WAIT_3D;
194 BEGIN_BCI(2);
195 BCI_WRITE(wait_cmd);
196 } else {
197 BEGIN_BCI(1);
198 }
199 BCI_WRITE(BCI_CMD_UPDATE_EVENT_TAG | (uint32_t)count);
200
201 return count;
202 }
203
204 /*
205 * Freelist management
206 */
207 static int savage_freelist_init(struct drm_device *dev)
208 {
209 drm_savage_private_t *dev_priv = dev->dev_private;
210 struct drm_device_dma *dma = dev->dma;
211 struct drm_buf *buf;
212 drm_savage_buf_priv_t *entry;
213 int i;
214 DRM_DEBUG("count=%d\n", dma->buf_count);
215
216 dev_priv->head.next = &dev_priv->tail;
217 dev_priv->head.prev = NULL;
218 dev_priv->head.buf = NULL;
219
220 dev_priv->tail.next = NULL;
221 dev_priv->tail.prev = &dev_priv->head;
222 dev_priv->tail.buf = NULL;
223
224 for (i = 0; i < dma->buf_count; i++) {
225 buf = dma->buflist[i];
226 entry = buf->dev_private;
227
228 SET_AGE(&entry->age, 0, 0);
229 entry->buf = buf;
230
231 entry->next = dev_priv->head.next;
232 entry->prev = &dev_priv->head;
233 dev_priv->head.next->prev = entry;
234 dev_priv->head.next = entry;
235 }
236
237 return 0;
238 }
239
240 static struct drm_buf *savage_freelist_get(struct drm_device *dev)
241 {
242 drm_savage_private_t *dev_priv = dev->dev_private;
243 drm_savage_buf_priv_t *tail = dev_priv->tail.prev;
244 uint16_t event;
245 unsigned int wrap;
246 DRM_DEBUG("\n");
247
248 UPDATE_EVENT_COUNTER();
249 if (dev_priv->status_ptr)
250 event = dev_priv->status_ptr[1] & 0xffff;
251 else
252 event = SAVAGE_READ(SAVAGE_STATUS_WORD1) & 0xffff;
253 wrap = dev_priv->event_wrap;
254 if (event > dev_priv->event_counter)
255 wrap--; /* hardware hasn't passed the last wrap yet */
256
257 DRM_DEBUG(" tail=0x%04x %d\n", tail->age.event, tail->age.wrap);
258 DRM_DEBUG(" head=0x%04x %d\n", event, wrap);
259
260 if (tail->buf && (TEST_AGE(&tail->age, event, wrap) || event == 0)) {
261 drm_savage_buf_priv_t *next = tail->next;
262 drm_savage_buf_priv_t *prev = tail->prev;
263 prev->next = next;
264 next->prev = prev;
265 tail->next = tail->prev = NULL;
266 return tail->buf;
267 }
268
269 DRM_DEBUG("returning NULL, tail->buf=%p!\n", tail->buf);
270 return NULL;
271 }
272
273 void savage_freelist_put(struct drm_device *dev, struct drm_buf *buf)
274 {
275 drm_savage_private_t *dev_priv = dev->dev_private;
276 drm_savage_buf_priv_t *entry = buf->dev_private, *prev, *next;
277
278 DRM_DEBUG("age=0x%04x wrap=%d\n", entry->age.event, entry->age.wrap);
279
280 if (entry->next != NULL || entry->prev != NULL) {
281 DRM_ERROR("entry already on freelist.\n");
282 return;
283 }
284
285 prev = &dev_priv->head;
286 next = prev->next;
287 prev->next = entry;
288 next->prev = entry;
289 entry->prev = prev;
290 entry->next = next;
291 }
292
293 /*
294 * Command DMA
295 */
296 static int savage_dma_init(drm_savage_private_t *dev_priv)
297 {
298 unsigned int i;
299
300 dev_priv->nr_dma_pages = dev_priv->cmd_dma->size /
301 (SAVAGE_DMA_PAGE_SIZE*4);
302 dev_priv->dma_pages = drm_alloc(sizeof(drm_savage_dma_page_t) *
303 dev_priv->nr_dma_pages, DRM_MEM_DRIVER);
304 if (dev_priv->dma_pages == NULL)
305 return -ENOMEM;
306
307 for (i = 0; i < dev_priv->nr_dma_pages; ++i) {
308 SET_AGE(&dev_priv->dma_pages[i].age, 0, 0);
309 dev_priv->dma_pages[i].used = 0;
310 dev_priv->dma_pages[i].flushed = 0;
311 }
312 SET_AGE(&dev_priv->last_dma_age, 0, 0);
313
314 dev_priv->first_dma_page = 0;
315 dev_priv->current_dma_page = 0;
316
317 return 0;
318 }
319
320 void savage_dma_reset(drm_savage_private_t *dev_priv)
321 {
322 uint16_t event;
323 unsigned int wrap, i;
324 event = savage_bci_emit_event(dev_priv, 0);
325 wrap = dev_priv->event_wrap;
326 for (i = 0; i < dev_priv->nr_dma_pages; ++i) {
327 SET_AGE(&dev_priv->dma_pages[i].age, event, wrap);
328 dev_priv->dma_pages[i].used = 0;
329 dev_priv->dma_pages[i].flushed = 0;
330 }
331 SET_AGE(&dev_priv->last_dma_age, event, wrap);
332 dev_priv->first_dma_page = dev_priv->current_dma_page = 0;
333 }
334
335 void savage_dma_wait(drm_savage_private_t *dev_priv, unsigned int page)
336 {
337 uint16_t event;
338 unsigned int wrap;
339
340 /* Faked DMA buffer pages don't age. */
341 if (dev_priv->cmd_dma == &dev_priv->fake_dma)
342 return;
343
344 UPDATE_EVENT_COUNTER();
345 if (dev_priv->status_ptr)
346 event = dev_priv->status_ptr[1] & 0xffff;
347 else
348 event = SAVAGE_READ(SAVAGE_STATUS_WORD1) & 0xffff;
349 wrap = dev_priv->event_wrap;
350 if (event > dev_priv->event_counter)
351 wrap--; /* hardware hasn't passed the last wrap yet */
352
353 if (dev_priv->dma_pages[page].age.wrap > wrap ||
354 (dev_priv->dma_pages[page].age.wrap == wrap &&
355 dev_priv->dma_pages[page].age.event > event)) {
356 if (dev_priv->wait_evnt(dev_priv,
357 dev_priv->dma_pages[page].age.event)
358 < 0)
359 DRM_ERROR("wait_evnt failed!\n");
360 }
361 }
362
363 uint32_t *savage_dma_alloc(drm_savage_private_t *dev_priv, unsigned int n)
364 {
365 unsigned int cur = dev_priv->current_dma_page;
366 unsigned int rest = SAVAGE_DMA_PAGE_SIZE -
367 dev_priv->dma_pages[cur].used;
368 unsigned int nr_pages = (n - rest + SAVAGE_DMA_PAGE_SIZE - 1) /
369 SAVAGE_DMA_PAGE_SIZE;
370 uint32_t *dma_ptr;
371 unsigned int i;
372
373 DRM_DEBUG("cur=%u, cur->used=%u, n=%u, rest=%u, nr_pages=%u\n",
374 cur, dev_priv->dma_pages[cur].used, n, rest, nr_pages);
375
376 if (cur + nr_pages < dev_priv->nr_dma_pages) {
377 dma_ptr = (uint32_t *)dev_priv->cmd_dma->handle +
378 cur * SAVAGE_DMA_PAGE_SIZE + dev_priv->dma_pages[cur].used;
379 if (n < rest)
380 rest = n;
381 dev_priv->dma_pages[cur].used += rest;
382 n -= rest;
383 cur++;
384 } else {
385 dev_priv->dma_flush(dev_priv);
386 nr_pages =
387 (n + SAVAGE_DMA_PAGE_SIZE - 1) / SAVAGE_DMA_PAGE_SIZE;
388 for (i = cur; i < dev_priv->nr_dma_pages; ++i) {
389 dev_priv->dma_pages[i].age = dev_priv->last_dma_age;
390 dev_priv->dma_pages[i].used = 0;
391 dev_priv->dma_pages[i].flushed = 0;
392 }
393 dma_ptr = (uint32_t *)dev_priv->cmd_dma->handle;
394 dev_priv->first_dma_page = cur = 0;
395 }
396 for (i = cur; nr_pages > 0; ++i, --nr_pages) {
397 #if SAVAGE_DMA_DEBUG
398 if (dev_priv->dma_pages[i].used) {
399 DRM_ERROR("unflushed page %u: used=%u\n",
400 i, dev_priv->dma_pages[i].used);
401 }
402 #endif
403 if (n > SAVAGE_DMA_PAGE_SIZE)
404 dev_priv->dma_pages[i].used = SAVAGE_DMA_PAGE_SIZE;
405 else
406 dev_priv->dma_pages[i].used = n;
407 n -= SAVAGE_DMA_PAGE_SIZE;
408 }
409 dev_priv->current_dma_page = --i;
410
411 DRM_DEBUG("cur=%u, cur->used=%u, n=%u\n",
412 i, dev_priv->dma_pages[i].used, n);
413
414 savage_dma_wait(dev_priv, dev_priv->current_dma_page);
415
416 return dma_ptr;
417 }
418
419 static void savage_dma_flush(drm_savage_private_t *dev_priv)
420 {
421 unsigned int first = dev_priv->first_dma_page;
422 unsigned int cur = dev_priv->current_dma_page;
423 uint16_t event;
424 unsigned int wrap, pad, align, len, i;
425 unsigned long phys_addr;
426 BCI_LOCALS;
427
428 if (first == cur &&
429 dev_priv->dma_pages[cur].used == dev_priv->dma_pages[cur].flushed)
430 return;
431
432 /* pad length to multiples of 2 entries
433 * align start of next DMA block to multiles of 8 entries */
434 pad = -dev_priv->dma_pages[cur].used & 1;
435 align = -(dev_priv->dma_pages[cur].used + pad) & 7;
436
437 DRM_DEBUG("first=%u, cur=%u, first->flushed=%u, cur->used=%u, "
438 "pad=%u, align=%u\n",
439 first, cur, dev_priv->dma_pages[first].flushed,
440 dev_priv->dma_pages[cur].used, pad, align);
441
442 /* pad with noops */
443 if (pad) {
444 uint32_t *dma_ptr = (uint32_t *)dev_priv->cmd_dma->handle +
445 cur * SAVAGE_DMA_PAGE_SIZE + dev_priv->dma_pages[cur].used;
446 dev_priv->dma_pages[cur].used += pad;
447 while (pad != 0) {
448 *dma_ptr++ = BCI_CMD_WAIT;
449 pad--;
450 }
451 }
452
453 DRM_MEMORYBARRIER();
454
455 /* do flush ... */
456 phys_addr = dev_priv->cmd_dma->offset +
457 (first * SAVAGE_DMA_PAGE_SIZE +
458 dev_priv->dma_pages[first].flushed) * 4;
459 len = (cur - first) * SAVAGE_DMA_PAGE_SIZE +
460 dev_priv->dma_pages[cur].used - 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 int savage_driver_load(struct drm_device *dev, unsigned long chipset)
540 {
541 drm_savage_private_t *dev_priv;
542
543 dev_priv = drm_alloc(sizeof(drm_savage_private_t), DRM_MEM_DRIVER);
544 if (dev_priv == NULL)
545 return -ENOMEM;
546
547 memset(dev_priv, 0, sizeof(drm_savage_private_t));
548 dev->dev_private = (void *)dev_priv;
549
550 dev_priv->chipset = (enum savage_family)chipset;
551
552 return 0;
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(struct drm_device *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(struct drm_device *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(struct drm_device *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(struct drm_device *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 -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 -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 -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 dev_priv->sarea = drm_getsarea(dev);
715 if (!dev_priv->sarea) {
716 DRM_ERROR("could not find sarea!\n");
717 savage_do_cleanup_bci(dev);
718 return -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 -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 -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 -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 -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 -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 -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 -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 -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 -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 -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 -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 -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 -ENOMEM;
896 }
897
898 return 0;
899 }
900
901 static int savage_do_cleanup_bci(struct drm_device *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(struct drm_device *dev, void *data, struct drm_file *file_priv)
932 {
933 drm_savage_init_t *init = data;
934
935 LOCK_TEST_WITH_RETURN(dev, file_priv);
936
937 switch (init->func) {
938 case SAVAGE_INIT_BCI:
939 return savage_do_init_bci(dev, init);
940 case SAVAGE_CLEANUP_BCI:
941 return savage_do_cleanup_bci(dev);
942 }
943
944 return -EINVAL;
945 }
946
947 static int savage_bci_event_emit(struct drm_device *dev, void *data, struct drm_file *file_priv)
948 {
949 drm_savage_private_t *dev_priv = dev->dev_private;
950 drm_savage_event_emit_t *event = data;
951
952 DRM_DEBUG("\n");
953
954 LOCK_TEST_WITH_RETURN(dev, file_priv);
955
956 event->count = savage_bci_emit_event(dev_priv, event->flags);
957 event->count |= dev_priv->event_wrap << 16;
958
959 return 0;
960 }
961
962 static int savage_bci_event_wait(struct drm_device *dev, void *data, struct drm_file *file_priv)
963 {
964 drm_savage_private_t *dev_priv = dev->dev_private;
965 drm_savage_event_wait_t *event = data;
966 unsigned int event_e, hw_e;
967 unsigned int event_w, hw_w;
968
969 DRM_DEBUG("\n");
970
971 UPDATE_EVENT_COUNTER();
972 if (dev_priv->status_ptr)
973 hw_e = dev_priv->status_ptr[1] & 0xffff;
974 else
975 hw_e = SAVAGE_READ(SAVAGE_STATUS_WORD1) & 0xffff;
976 hw_w = dev_priv->event_wrap;
977 if (hw_e > dev_priv->event_counter)
978 hw_w--; /* hardware hasn't passed the last wrap yet */
979
980 event_e = event->count & 0xffff;
981 event_w = event->count >> 16;
982
983 /* Don't need to wait if
984 * - event counter wrapped since the event was emitted or
985 * - the hardware has advanced up to or over the event to wait for.
986 */
987 if (event_w < hw_w || (event_w == hw_w && event_e <= hw_e))
988 return 0;
989 else
990 return dev_priv->wait_evnt(dev_priv, event_e);
991 }
992
993 /*
994 * DMA buffer management
995 */
996
997 static int savage_bci_get_buffers(struct drm_device *dev,
998 struct drm_file *file_priv,
999 struct drm_dma *d)
1000 {
1001 struct drm_buf *buf;
1002 int i;
1003
1004 for (i = d->granted_count; i < d->request_count; i++) {
1005 buf = savage_freelist_get(dev);
1006 if (!buf)
1007 return -EAGAIN;
1008
1009 buf->file_priv = file_priv;
1010
1011 if (DRM_COPY_TO_USER(&d->request_indices[i],
1012 &buf->idx, sizeof(buf->idx)))
1013 return -EFAULT;
1014 if (DRM_COPY_TO_USER(&d->request_sizes[i],
1015 &buf->total, sizeof(buf->total)))
1016 return -EFAULT;
1017
1018 d->granted_count++;
1019 }
1020 return 0;
1021 }
1022
1023 int savage_bci_buffers(struct drm_device *dev, void *data, struct drm_file *file_priv)
1024 {
1025 struct drm_device_dma *dma = dev->dma;
1026 struct drm_dma *d = data;
1027 int ret = 0;
1028
1029 LOCK_TEST_WITH_RETURN(dev, file_priv);
1030
1031 /* Please don't send us buffers.
1032 */
1033 if (d->send_count != 0) {
1034 DRM_ERROR("Process %d trying to send %d buffers via drmDMA\n",
1035 DRM_CURRENTPID, d->send_count);
1036 return -EINVAL;
1037 }
1038
1039 /* We'll send you buffers.
1040 */
1041 if (d->request_count < 0 || d->request_count > dma->buf_count) {
1042 DRM_ERROR("Process %d trying to get %d buffers (of %d max)\n",
1043 DRM_CURRENTPID, d->request_count, dma->buf_count);
1044 return -EINVAL;
1045 }
1046
1047 d->granted_count = 0;
1048
1049 if (d->request_count) {
1050 ret = savage_bci_get_buffers(dev, file_priv, d);
1051 }
1052
1053 return ret;
1054 }
1055
1056 void savage_reclaim_buffers(struct drm_device *dev, struct drm_file *file_priv)
1057 {
1058 struct drm_device_dma *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 for (i = 0; i < dma->buf_count; i++) {
1070 struct drm_buf *buf = dma->buflist[i];
1071 drm_savage_buf_priv_t *buf_priv = buf->dev_private;
1072
1073 if (buf->file_priv == file_priv && buf_priv &&
1074 buf_priv->next == NULL && buf_priv->prev == NULL) {
1075 uint16_t event;
1076 DRM_DEBUG("reclaimed from client\n");
1077 event = savage_bci_emit_event(dev_priv, SAVAGE_WAIT_3D);
1078 SET_AGE(&buf_priv->age, event, dev_priv->event_wrap);
1079 savage_freelist_put(dev, buf);
1080 }
1081 }
1082
1083 drm_core_reclaim_buffers(dev, file_priv);
1084 }
1085
1086 struct drm_ioctl_desc savage_ioctls[] = {
1087 DRM_IOCTL_DEF(DRM_SAVAGE_BCI_INIT, savage_bci_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1088 DRM_IOCTL_DEF(DRM_SAVAGE_BCI_CMDBUF, savage_bci_cmdbuf, DRM_AUTH),
1089 DRM_IOCTL_DEF(DRM_SAVAGE_BCI_EVENT_EMIT, savage_bci_event_emit, DRM_AUTH),
1090 DRM_IOCTL_DEF(DRM_SAVAGE_BCI_EVENT_WAIT, savage_bci_event_wait, DRM_AUTH),
1091 };
1092
1093 int savage_max_ioctl = DRM_ARRAY_SIZE(savage_ioctls);
DragonFly BSD