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 <drm/drmP.h>
26 #include <drm/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(struct drm_device *dev);
36
37 static int
savage_bci_wait_fifo_shadow(drm_savage_private_t * dev_priv,unsigned int n)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 mb();
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 -EBUSY;
64 }
65
66 static int
savage_bci_wait_fifo_s3d(drm_savage_private_t * dev_priv,unsigned int n)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 -EBUSY;
85 }
86
87 static int
savage_bci_wait_fifo_s4(drm_savage_private_t * dev_priv,unsigned int n)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 -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
savage_bci_wait_event_shadow(drm_savage_private_t * dev_priv,uint16_t e)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 mb();
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 -EBUSY;
140 }
141
142 static int
savage_bci_wait_event_reg(drm_savage_private_t * dev_priv,uint16_t e)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 -EBUSY;
162 }
163
savage_bci_emit_event(drm_savage_private_t * dev_priv,unsigned int flags)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 */
savage_freelist_init(struct drm_device * dev)206 static int savage_freelist_init(struct drm_device * dev)
207 {
208 drm_savage_private_t *dev_priv = dev->dev_private;
209 struct drm_device_dma *dma = dev->dma;
210 struct drm_buf *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
savage_freelist_get(struct drm_device * dev)239 static struct drm_buf *savage_freelist_get(struct drm_device * 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
savage_freelist_put(struct drm_device * dev,struct drm_buf * buf)272 void savage_freelist_put(struct drm_device * dev, struct drm_buf * 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 */
savage_dma_init(drm_savage_private_t * dev_priv)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 = kmalloc(sizeof(drm_savage_dma_page_t) *
302 dev_priv->nr_dma_pages, GFP_KERNEL);
303 if (dev_priv->dma_pages == NULL)
304 return -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
savage_dma_reset(drm_savage_private_t * dev_priv)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
savage_dma_wait(drm_savage_private_t * dev_priv,unsigned int page)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
savage_dma_alloc(drm_savage_private_t * dev_priv,unsigned int n)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
savage_dma_flush(drm_savage_private_t * dev_priv)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 mb();
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
savage_fake_dma_flush(drm_savage_private_t * dev_priv)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
savage_driver_load(struct drm_device * dev,unsigned long chipset)538 int savage_driver_load(struct drm_device *dev, unsigned long chipset)
539 {
540 drm_savage_private_t *dev_priv;
541
542 dev_priv = kzalloc(sizeof(drm_savage_private_t), GFP_KERNEL);
543 if (dev_priv == NULL)
544 return -ENOMEM;
545
546 dev->dev_private = (void *)dev_priv;
547
548 dev_priv->chipset = (enum savage_family)chipset;
549
550 pci_set_master(dev->pdev);
551
552 return 0;
553 }
554
555
556 /*
557 * Initialize mappings. On Savage4 and SavageIX the alignment
558 * and size of the aperture is not suitable for automatic MTRR setup
559 * in drm_legacy_addmap. Therefore we add them manually before the maps are
560 * initialized, and tear them down on last close.
561 */
savage_driver_firstopen(struct drm_device * dev)562 int savage_driver_firstopen(struct drm_device *dev)
563 {
564 drm_savage_private_t *dev_priv = dev->dev_private;
565 unsigned long mmio_base, fb_base, fb_size, aperture_base;
566 /* fb_rsrc and aper_rsrc aren't really used currently, but still exist
567 * in case we decide we need information on the BAR for BSD in the
568 * future.
569 */
570 unsigned int fb_rsrc, aper_rsrc;
571 int ret = 0;
572
573 if (S3_SAVAGE3D_SERIES(dev_priv->chipset)) {
574 fb_rsrc = 0;
575 fb_base = pci_resource_start(dev->pdev, 0);
576 fb_size = SAVAGE_FB_SIZE_S3;
577 mmio_base = fb_base + SAVAGE_FB_SIZE_S3;
578 aper_rsrc = 0;
579 aperture_base = fb_base + SAVAGE_APERTURE_OFFSET;
580 /* this should always be true */
581 if (pci_resource_len(dev->pdev, 0) == 0x08000000) {
582 /* Don't make MMIO write-cobining! We need 3
583 * MTRRs. */
584 dev_priv->mtrr_handles[0] =
585 arch_phys_wc_add(fb_base, 0x01000000);
586 dev_priv->mtrr_handles[1] =
587 arch_phys_wc_add(fb_base + 0x02000000,
588 0x02000000);
589 dev_priv->mtrr_handles[2] =
590 arch_phys_wc_add(fb_base + 0x04000000,
591 0x04000000);
592 } else {
593 DRM_ERROR("strange pci_resource_len %08llx\n",
594 (unsigned long long)
595 pci_resource_len(dev->pdev, 0));
596 }
597 } else if (dev_priv->chipset != S3_SUPERSAVAGE &&
598 dev_priv->chipset != S3_SAVAGE2000) {
599 mmio_base = pci_resource_start(dev->pdev, 0);
600 fb_rsrc = 1;
601 fb_base = pci_resource_start(dev->pdev, 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 (pci_resource_len(dev->pdev, 1) == 0x08000000) {
607 /* Can use one MTRR to cover both fb and
608 * aperture. */
609 dev_priv->mtrr_handles[0] =
610 arch_phys_wc_add(fb_base,
611 0x08000000);
612 } else {
613 DRM_ERROR("strange pci_resource_len %08llx\n",
614 (unsigned long long)
615 pci_resource_len(dev->pdev, 1));
616 }
617 } else {
618 mmio_base = pci_resource_start(dev->pdev, 0);
619 fb_rsrc = 1;
620 fb_base = pci_resource_start(dev->pdev, 1);
621 fb_size = pci_resource_len(dev->pdev, 1);
622 aper_rsrc = 2;
623 aperture_base = pci_resource_start(dev->pdev, 2);
624 /* Automatic MTRR setup will do the right thing. */
625 }
626
627 ret = drm_legacy_addmap(dev, mmio_base, SAVAGE_MMIO_SIZE,
628 _DRM_REGISTERS, _DRM_READ_ONLY,
629 &dev_priv->mmio);
630 if (ret)
631 return ret;
632
633 ret = drm_legacy_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_legacy_addmap(dev, aperture_base, SAVAGE_APERTURE_SIZE,
639 _DRM_FRAME_BUFFER, _DRM_WRITE_COMBINING,
640 &dev_priv->aperture);
641 return ret;
642 }
643
644 /*
645 * Delete MTRRs and free device-private data.
646 */
savage_driver_lastclose(struct drm_device * dev)647 void savage_driver_lastclose(struct drm_device *dev)
648 {
649 drm_savage_private_t *dev_priv = dev->dev_private;
650 int i;
651
652 for (i = 0; i < 3; ++i) {
653 arch_phys_wc_del(dev_priv->mtrr_handles[i]);
654 dev_priv->mtrr_handles[i] = 0;
655 }
656 }
657
savage_driver_unload(struct drm_device * dev)658 int savage_driver_unload(struct drm_device *dev)
659 {
660 drm_savage_private_t *dev_priv = dev->dev_private;
661
662 kfree(dev_priv);
663
664 return 0;
665 }
666
savage_do_init_bci(struct drm_device * dev,drm_savage_init_t * init)667 static int savage_do_init_bci(struct drm_device * dev, drm_savage_init_t * init)
668 {
669 drm_savage_private_t *dev_priv = dev->dev_private;
670
671 if (init->fb_bpp != 16 && init->fb_bpp != 32) {
672 DRM_ERROR("invalid frame buffer bpp %d!\n", init->fb_bpp);
673 return -EINVAL;
674 }
675 if (init->depth_bpp != 16 && init->depth_bpp != 32) {
676 DRM_ERROR("invalid depth buffer bpp %d!\n", init->fb_bpp);
677 return -EINVAL;
678 }
679 if (init->dma_type != SAVAGE_DMA_AGP &&
680 init->dma_type != SAVAGE_DMA_PCI) {
681 DRM_ERROR("invalid dma memory type %d!\n", init->dma_type);
682 return -EINVAL;
683 }
684
685 dev_priv->cob_size = init->cob_size;
686 dev_priv->bci_threshold_lo = init->bci_threshold_lo;
687 dev_priv->bci_threshold_hi = init->bci_threshold_hi;
688 dev_priv->dma_type = init->dma_type;
689
690 dev_priv->fb_bpp = init->fb_bpp;
691 dev_priv->front_offset = init->front_offset;
692 dev_priv->front_pitch = init->front_pitch;
693 dev_priv->back_offset = init->back_offset;
694 dev_priv->back_pitch = init->back_pitch;
695 dev_priv->depth_bpp = init->depth_bpp;
696 dev_priv->depth_offset = init->depth_offset;
697 dev_priv->depth_pitch = init->depth_pitch;
698
699 dev_priv->texture_offset = init->texture_offset;
700 dev_priv->texture_size = init->texture_size;
701
702 dev_priv->sarea = drm_legacy_getsarea(dev);
703 if (!dev_priv->sarea) {
704 DRM_ERROR("could not find sarea!\n");
705 savage_do_cleanup_bci(dev);
706 return -EINVAL;
707 }
708 if (init->status_offset != 0) {
709 dev_priv->status = drm_legacy_findmap(dev, init->status_offset);
710 if (!dev_priv->status) {
711 DRM_ERROR("could not find shadow status region!\n");
712 savage_do_cleanup_bci(dev);
713 return -EINVAL;
714 }
715 } else {
716 dev_priv->status = NULL;
717 }
718 if (dev_priv->dma_type == SAVAGE_DMA_AGP && init->buffers_offset) {
719 dev->agp_buffer_token = init->buffers_offset;
720 dev->agp_buffer_map = drm_legacy_findmap(dev,
721 init->buffers_offset);
722 if (!dev->agp_buffer_map) {
723 DRM_ERROR("could not find DMA buffer region!\n");
724 savage_do_cleanup_bci(dev);
725 return -EINVAL;
726 }
727 drm_legacy_ioremap(dev->agp_buffer_map, dev);
728 if (!dev->agp_buffer_map->handle) {
729 DRM_ERROR("failed to ioremap DMA buffer region!\n");
730 savage_do_cleanup_bci(dev);
731 return -ENOMEM;
732 }
733 }
734 if (init->agp_textures_offset) {
735 dev_priv->agp_textures =
736 drm_legacy_findmap(dev, init->agp_textures_offset);
737 if (!dev_priv->agp_textures) {
738 DRM_ERROR("could not find agp texture region!\n");
739 savage_do_cleanup_bci(dev);
740 return -EINVAL;
741 }
742 } else {
743 dev_priv->agp_textures = NULL;
744 }
745
746 if (init->cmd_dma_offset) {
747 if (S3_SAVAGE3D_SERIES(dev_priv->chipset)) {
748 DRM_ERROR("command DMA not supported on "
749 "Savage3D/MX/IX.\n");
750 savage_do_cleanup_bci(dev);
751 return -EINVAL;
752 }
753 if (dev->dma && dev->dma->buflist) {
754 DRM_ERROR("command and vertex DMA not supported "
755 "at the same time.\n");
756 savage_do_cleanup_bci(dev);
757 return -EINVAL;
758 }
759 dev_priv->cmd_dma = drm_legacy_findmap(dev, init->cmd_dma_offset);
760 if (!dev_priv->cmd_dma) {
761 DRM_ERROR("could not find command DMA region!\n");
762 savage_do_cleanup_bci(dev);
763 return -EINVAL;
764 }
765 if (dev_priv->dma_type == SAVAGE_DMA_AGP) {
766 if (dev_priv->cmd_dma->type != _DRM_AGP) {
767 DRM_ERROR("AGP command DMA region is not a "
768 "_DRM_AGP map!\n");
769 savage_do_cleanup_bci(dev);
770 return -EINVAL;
771 }
772 drm_legacy_ioremap(dev_priv->cmd_dma, dev);
773 if (!dev_priv->cmd_dma->handle) {
774 DRM_ERROR("failed to ioremap command "
775 "DMA region!\n");
776 savage_do_cleanup_bci(dev);
777 return -ENOMEM;
778 }
779 } else if (dev_priv->cmd_dma->type != _DRM_CONSISTENT) {
780 DRM_ERROR("PCI command DMA region is not a "
781 "_DRM_CONSISTENT map!\n");
782 savage_do_cleanup_bci(dev);
783 return -EINVAL;
784 }
785 } else {
786 dev_priv->cmd_dma = NULL;
787 }
788
789 dev_priv->dma_flush = savage_dma_flush;
790 if (!dev_priv->cmd_dma) {
791 DRM_DEBUG("falling back to faked command DMA.\n");
792 dev_priv->fake_dma.offset = 0;
793 dev_priv->fake_dma.size = SAVAGE_FAKE_DMA_SIZE;
794 dev_priv->fake_dma.type = _DRM_SHM;
795 dev_priv->fake_dma.handle = kmalloc(SAVAGE_FAKE_DMA_SIZE,
796 GFP_KERNEL);
797 if (!dev_priv->fake_dma.handle) {
798 DRM_ERROR("could not allocate faked DMA buffer!\n");
799 savage_do_cleanup_bci(dev);
800 return -ENOMEM;
801 }
802 dev_priv->cmd_dma = &dev_priv->fake_dma;
803 dev_priv->dma_flush = savage_fake_dma_flush;
804 }
805
806 dev_priv->sarea_priv =
807 (drm_savage_sarea_t *) ((uint8_t *) dev_priv->sarea->handle +
808 init->sarea_priv_offset);
809
810 /* setup bitmap descriptors */
811 {
812 unsigned int color_tile_format;
813 unsigned int depth_tile_format;
814 unsigned int front_stride, back_stride, depth_stride;
815 if (dev_priv->chipset <= S3_SAVAGE4) {
816 color_tile_format = dev_priv->fb_bpp == 16 ?
817 SAVAGE_BD_TILE_16BPP : SAVAGE_BD_TILE_32BPP;
818 depth_tile_format = dev_priv->depth_bpp == 16 ?
819 SAVAGE_BD_TILE_16BPP : SAVAGE_BD_TILE_32BPP;
820 } else {
821 color_tile_format = SAVAGE_BD_TILE_DEST;
822 depth_tile_format = SAVAGE_BD_TILE_DEST;
823 }
824 front_stride = dev_priv->front_pitch / (dev_priv->fb_bpp / 8);
825 back_stride = dev_priv->back_pitch / (dev_priv->fb_bpp / 8);
826 depth_stride =
827 dev_priv->depth_pitch / (dev_priv->depth_bpp / 8);
828
829 dev_priv->front_bd = front_stride | SAVAGE_BD_BW_DISABLE |
830 (dev_priv->fb_bpp << SAVAGE_BD_BPP_SHIFT) |
831 (color_tile_format << SAVAGE_BD_TILE_SHIFT);
832
833 dev_priv->back_bd = back_stride | SAVAGE_BD_BW_DISABLE |
834 (dev_priv->fb_bpp << SAVAGE_BD_BPP_SHIFT) |
835 (color_tile_format << SAVAGE_BD_TILE_SHIFT);
836
837 dev_priv->depth_bd = depth_stride | SAVAGE_BD_BW_DISABLE |
838 (dev_priv->depth_bpp << SAVAGE_BD_BPP_SHIFT) |
839 (depth_tile_format << SAVAGE_BD_TILE_SHIFT);
840 }
841
842 /* setup status and bci ptr */
843 dev_priv->event_counter = 0;
844 dev_priv->event_wrap = 0;
845 dev_priv->bci_ptr = (volatile uint32_t *)
846 ((uint8_t *) dev_priv->mmio->handle + SAVAGE_BCI_OFFSET);
847 if (S3_SAVAGE3D_SERIES(dev_priv->chipset)) {
848 dev_priv->status_used_mask = SAVAGE_FIFO_USED_MASK_S3D;
849 } else {
850 dev_priv->status_used_mask = SAVAGE_FIFO_USED_MASK_S4;
851 }
852 if (dev_priv->status != NULL) {
853 dev_priv->status_ptr =
854 (volatile uint32_t *)dev_priv->status->handle;
855 dev_priv->wait_fifo = savage_bci_wait_fifo_shadow;
856 dev_priv->wait_evnt = savage_bci_wait_event_shadow;
857 dev_priv->status_ptr[1023] = dev_priv->event_counter;
858 } else {
859 dev_priv->status_ptr = NULL;
860 if (S3_SAVAGE3D_SERIES(dev_priv->chipset)) {
861 dev_priv->wait_fifo = savage_bci_wait_fifo_s3d;
862 } else {
863 dev_priv->wait_fifo = savage_bci_wait_fifo_s4;
864 }
865 dev_priv->wait_evnt = savage_bci_wait_event_reg;
866 }
867
868 /* cliprect functions */
869 if (S3_SAVAGE3D_SERIES(dev_priv->chipset))
870 dev_priv->emit_clip_rect = savage_emit_clip_rect_s3d;
871 else
872 dev_priv->emit_clip_rect = savage_emit_clip_rect_s4;
873
874 if (savage_freelist_init(dev) < 0) {
875 DRM_ERROR("could not initialize freelist\n");
876 savage_do_cleanup_bci(dev);
877 return -ENOMEM;
878 }
879
880 if (savage_dma_init(dev_priv) < 0) {
881 DRM_ERROR("could not initialize command DMA\n");
882 savage_do_cleanup_bci(dev);
883 return -ENOMEM;
884 }
885
886 return 0;
887 }
888
savage_do_cleanup_bci(struct drm_device * dev)889 static int savage_do_cleanup_bci(struct drm_device * dev)
890 {
891 drm_savage_private_t *dev_priv = dev->dev_private;
892
893 if (dev_priv->cmd_dma == &dev_priv->fake_dma) {
894 kfree(dev_priv->fake_dma.handle);
895 } else if (dev_priv->cmd_dma && dev_priv->cmd_dma->handle &&
896 dev_priv->cmd_dma->type == _DRM_AGP &&
897 dev_priv->dma_type == SAVAGE_DMA_AGP)
898 drm_legacy_ioremapfree(dev_priv->cmd_dma, dev);
899
900 if (dev_priv->dma_type == SAVAGE_DMA_AGP &&
901 dev->agp_buffer_map && dev->agp_buffer_map->handle) {
902 drm_legacy_ioremapfree(dev->agp_buffer_map, dev);
903 /* make sure the next instance (which may be running
904 * in PCI mode) doesn't try to use an old
905 * agp_buffer_map. */
906 dev->agp_buffer_map = NULL;
907 }
908
909 kfree(dev_priv->dma_pages);
910
911 return 0;
912 }
913
savage_bci_init(struct drm_device * dev,void * data,struct drm_file * file_priv)914 static int savage_bci_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
915 {
916 drm_savage_init_t *init = data;
917
918 LOCK_TEST_WITH_RETURN(dev, file_priv);
919
920 switch (init->func) {
921 case SAVAGE_INIT_BCI:
922 return savage_do_init_bci(dev, init);
923 case SAVAGE_CLEANUP_BCI:
924 return savage_do_cleanup_bci(dev);
925 }
926
927 return -EINVAL;
928 }
929
savage_bci_event_emit(struct drm_device * dev,void * data,struct drm_file * file_priv)930 static int savage_bci_event_emit(struct drm_device *dev, void *data, struct drm_file *file_priv)
931 {
932 drm_savage_private_t *dev_priv = dev->dev_private;
933 drm_savage_event_emit_t *event = data;
934
935 DRM_DEBUG("\n");
936
937 LOCK_TEST_WITH_RETURN(dev, file_priv);
938
939 event->count = savage_bci_emit_event(dev_priv, event->flags);
940 event->count |= dev_priv->event_wrap << 16;
941
942 return 0;
943 }
944
savage_bci_event_wait(struct drm_device * dev,void * data,struct drm_file * file_priv)945 static int savage_bci_event_wait(struct drm_device *dev, void *data, struct drm_file *file_priv)
946 {
947 drm_savage_private_t *dev_priv = dev->dev_private;
948 drm_savage_event_wait_t *event = data;
949 unsigned int event_e, hw_e;
950 unsigned int event_w, hw_w;
951
952 DRM_DEBUG("\n");
953
954 UPDATE_EVENT_COUNTER();
955 if (dev_priv->status_ptr)
956 hw_e = dev_priv->status_ptr[1] & 0xffff;
957 else
958 hw_e = SAVAGE_READ(SAVAGE_STATUS_WORD1) & 0xffff;
959 hw_w = dev_priv->event_wrap;
960 if (hw_e > dev_priv->event_counter)
961 hw_w--; /* hardware hasn't passed the last wrap yet */
962
963 event_e = event->count & 0xffff;
964 event_w = event->count >> 16;
965
966 /* Don't need to wait if
967 * - event counter wrapped since the event was emitted or
968 * - the hardware has advanced up to or over the event to wait for.
969 */
970 if (event_w < hw_w || (event_w == hw_w && event_e <= hw_e))
971 return 0;
972 else
973 return dev_priv->wait_evnt(dev_priv, event_e);
974 }
975
976 /*
977 * DMA buffer management
978 */
979
savage_bci_get_buffers(struct drm_device * dev,struct drm_file * file_priv,struct drm_dma * d)980 static int savage_bci_get_buffers(struct drm_device *dev,
981 struct drm_file *file_priv,
982 struct drm_dma *d)
983 {
984 struct drm_buf *buf;
985 int i;
986
987 for (i = d->granted_count; i < d->request_count; i++) {
988 buf = savage_freelist_get(dev);
989 if (!buf)
990 return -EAGAIN;
991
992 buf->file_priv = file_priv;
993
994 if (copy_to_user(&d->request_indices[i],
995 &buf->idx, sizeof(buf->idx)))
996 return -EFAULT;
997 if (copy_to_user(&d->request_sizes[i],
998 &buf->total, sizeof(buf->total)))
999 return -EFAULT;
1000
1001 d->granted_count++;
1002 }
1003 return 0;
1004 }
1005
savage_bci_buffers(struct drm_device * dev,void * data,struct drm_file * file_priv)1006 int savage_bci_buffers(struct drm_device *dev, void *data, struct drm_file *file_priv)
1007 {
1008 struct drm_device_dma *dma = dev->dma;
1009 struct drm_dma *d = data;
1010 int ret = 0;
1011
1012 LOCK_TEST_WITH_RETURN(dev, file_priv);
1013
1014 /* Please don't send us buffers.
1015 */
1016 if (d->send_count != 0) {
1017 DRM_ERROR("Process %d trying to send %d buffers via drmDMA\n",
1018 DRM_CURRENTPID, d->send_count);
1019 return -EINVAL;
1020 }
1021
1022 /* We'll send you buffers.
1023 */
1024 if (d->request_count < 0 || d->request_count > dma->buf_count) {
1025 DRM_ERROR("Process %d trying to get %d buffers (of %d max)\n",
1026 DRM_CURRENTPID, d->request_count, dma->buf_count);
1027 return -EINVAL;
1028 }
1029
1030 d->granted_count = 0;
1031
1032 if (d->request_count) {
1033 ret = savage_bci_get_buffers(dev, file_priv, d);
1034 }
1035
1036 return ret;
1037 }
1038
savage_reclaim_buffers(struct drm_device * dev,struct drm_file * file_priv)1039 void savage_reclaim_buffers(struct drm_device *dev, struct drm_file *file_priv)
1040 {
1041 struct drm_device_dma *dma = dev->dma;
1042 drm_savage_private_t *dev_priv = dev->dev_private;
1043 int release_idlelock = 0;
1044 int i;
1045
1046 if (!dma)
1047 return;
1048 if (!dev_priv)
1049 return;
1050 if (!dma->buflist)
1051 return;
1052
1053 if (file_priv->master && file_priv->master->lock.hw_lock) {
1054 drm_legacy_idlelock_take(&file_priv->master->lock);
1055 release_idlelock = 1;
1056 }
1057
1058 for (i = 0; i < dma->buf_count; i++) {
1059 struct drm_buf *buf = dma->buflist[i];
1060 drm_savage_buf_priv_t *buf_priv = buf->dev_private;
1061
1062 if (buf->file_priv == file_priv && buf_priv &&
1063 buf_priv->next == NULL && buf_priv->prev == NULL) {
1064 uint16_t event;
1065 DRM_DEBUG("reclaimed from client\n");
1066 event = savage_bci_emit_event(dev_priv, SAVAGE_WAIT_3D);
1067 SET_AGE(&buf_priv->age, event, dev_priv->event_wrap);
1068 savage_freelist_put(dev, buf);
1069 }
1070 }
1071
1072 if (release_idlelock)
1073 drm_legacy_idlelock_release(&file_priv->master->lock);
1074 }
1075
1076 const struct drm_ioctl_desc savage_ioctls[] = {
1077 DRM_IOCTL_DEF_DRV(SAVAGE_BCI_INIT, savage_bci_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1078 DRM_IOCTL_DEF_DRV(SAVAGE_BCI_CMDBUF, savage_bci_cmdbuf, DRM_AUTH),
1079 DRM_IOCTL_DEF_DRV(SAVAGE_BCI_EVENT_EMIT, savage_bci_event_emit, DRM_AUTH),
1080 DRM_IOCTL_DEF_DRV(SAVAGE_BCI_EVENT_WAIT, savage_bci_event_wait, DRM_AUTH),
1081 };
1082
1083 int savage_max_ioctl = ARRAY_SIZE(savage_ioctls);
1084