1 /* savage_bci.c -- BCI support for Savage
3 * Copyright 2004 Felix Kuehling
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:
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial portions
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.
26 #include <sys/cdefs.h>
27 __FBSDID("$FreeBSD$");
28 #include "dev/drm/drmP.h"
29 #include "dev/drm/savage_drm.h"
30 #include "dev/drm/savage_drv.h"
32 /* Need a long timeout for shadow status updates can take a while
33 * and so can waiting for events when the queue is full. */
34 #define SAVAGE_DEFAULT_USEC_TIMEOUT 1000000 /* 1s */
35 #define SAVAGE_EVENT_USEC_TIMEOUT 5000000 /* 5s */
36 #define SAVAGE_FREELIST_DEBUG 0
39 savage_bci_wait_fifo_shadow(drm_savage_private_t *dev_priv, unsigned int n)
41 uint32_t mask = dev_priv->status_used_mask;
42 uint32_t threshold = dev_priv->bci_threshold_hi;
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);
52 for (i = 0; i < SAVAGE_DEFAULT_USEC_TIMEOUT; i++) {
54 status = dev_priv->status_ptr[0];
55 if ((status & mask) < threshold)
61 DRM_ERROR("failed!\n");
62 DRM_INFO(" status=0x%08x, threshold=0x%08x\n", status, threshold);
64 return DRM_ERR(EBUSY);
68 savage_bci_wait_fifo_s3d(drm_savage_private_t *dev_priv, unsigned int n)
70 uint32_t maxUsed = dev_priv->cob_size + SAVAGE_BCI_FIFO_SIZE - n;
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)
82 DRM_ERROR("failed!\n");
83 DRM_INFO(" status=0x%08x\n", status);
85 return DRM_ERR(EBUSY);
89 savage_bci_wait_fifo_s4(drm_savage_private_t *dev_priv, unsigned int n)
91 uint32_t maxUsed = dev_priv->cob_size + SAVAGE_BCI_FIFO_SIZE - n;
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)
103 DRM_ERROR("failed!\n");
104 DRM_INFO(" status=0x%08x\n", status);
106 return DRM_ERR(EBUSY);
110 * Waiting for events.
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
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.
121 savage_bci_wait_event_shadow(drm_savage_private_t *dev_priv, uint16_t e)
126 for (i = 0; i < SAVAGE_EVENT_USEC_TIMEOUT; i++) {
128 status = dev_priv->status_ptr[1];
129 if ((((status & 0xffff) - e) & 0xffff) <= 0x7fff ||
130 (status & 0xffff) == 0)
136 DRM_ERROR("failed!\n");
137 DRM_INFO(" status=0x%08x, e=0x%04x\n", status, e);
140 return DRM_ERR(EBUSY);
144 savage_bci_wait_event_reg(drm_savage_private_t *dev_priv, uint16_t e)
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)
158 DRM_ERROR("failed!\n");
159 DRM_INFO(" status=0x%08x, e=0x%04x\n", status, e);
162 return DRM_ERR(EBUSY);
165 uint16_t savage_bci_emit_event(drm_savage_private_t *dev_priv,
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++;
177 count = dev_priv->event_counter;
179 count = (count + 1) & 0xffff;
181 count++; /* See the comment above savage_wait_event_*. */
182 dev_priv->event_wrap++;
184 dev_priv->event_counter = count;
185 if (dev_priv->status_ptr)
186 dev_priv->status_ptr[1023] = (uint32_t)count;
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;
199 BCI_WRITE(BCI_CMD_UPDATE_EVENT_TAG | (uint32_t)count);
205 * Freelist management
207 static int savage_freelist_init(drm_device_t *dev)
209 drm_savage_private_t *dev_priv = dev->dev_private;
210 drm_device_dma_t *dma = dev->dma;
212 drm_savage_buf_priv_t *entry;
214 DRM_DEBUG("count=%d\n", dma->buf_count);
216 dev_priv->head.next = &dev_priv->tail;
217 dev_priv->head.prev = NULL;
218 dev_priv->head.buf = NULL;
220 dev_priv->tail.next = NULL;
221 dev_priv->tail.prev = &dev_priv->head;
222 dev_priv->tail.buf = NULL;
224 for (i = 0; i < dma->buf_count; i++) {
225 buf = dma->buflist[i];
226 entry = buf->dev_private;
228 SET_AGE(&entry->age, 0, 0);
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;
240 static drm_buf_t *savage_freelist_get(drm_device_t *dev)
242 drm_savage_private_t *dev_priv = dev->dev_private;
243 drm_savage_buf_priv_t *tail = dev_priv->tail.prev;
248 UPDATE_EVENT_COUNTER();
249 if (dev_priv->status_ptr)
250 event = dev_priv->status_ptr[1] & 0xffff;
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 */
257 DRM_DEBUG(" tail=0x%04x %d\n", tail->age.event, tail->age.wrap);
258 DRM_DEBUG(" head=0x%04x %d\n", event, wrap);
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;
265 tail->next = tail->prev = NULL;
269 DRM_DEBUG("returning NULL, tail->buf=%p!\n", tail->buf);
273 void savage_freelist_put(drm_device_t *dev, drm_buf_t *buf)
275 drm_savage_private_t *dev_priv = dev->dev_private;
276 drm_savage_buf_priv_t *entry = buf->dev_private, *prev, *next;
278 DRM_DEBUG("age=0x%04x wrap=%d\n", entry->age.event, entry->age.wrap);
280 if (entry->next != NULL || entry->prev != NULL) {
281 DRM_ERROR("entry already on freelist.\n");
285 prev = &dev_priv->head;
296 static int savage_dma_init(drm_savage_private_t *dev_priv)
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 DRM_ERR(ENOMEM);
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;
312 SET_AGE(&dev_priv->last_dma_age, 0, 0);
314 dev_priv->first_dma_page = 0;
315 dev_priv->current_dma_page = 0;
320 void savage_dma_reset(drm_savage_private_t *dev_priv)
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;
331 SET_AGE(&dev_priv->last_dma_age, event, wrap);
332 dev_priv->first_dma_page = dev_priv->current_dma_page = 0;
335 void savage_dma_wait(drm_savage_private_t *dev_priv, unsigned int page)
340 /* Faked DMA buffer pages don't age. */
341 if (dev_priv->cmd_dma == &dev_priv->fake_dma)
344 UPDATE_EVENT_COUNTER();
345 if (dev_priv->status_ptr)
346 event = dev_priv->status_ptr[1] & 0xffff;
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 */
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)
359 DRM_ERROR("wait_evnt failed!\n");
363 uint32_t *savage_dma_alloc(drm_savage_private_t *dev_priv, unsigned int n)
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;
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);
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;
381 dev_priv->dma_pages[cur].used += rest;
385 dev_priv->dma_flush(dev_priv);
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;
393 dma_ptr = (uint32_t *)dev_priv->cmd_dma->handle;
394 dev_priv->first_dma_page = cur = 0;
396 for (i = cur; nr_pages > 0; ++i, --nr_pages) {
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);
403 if (n > SAVAGE_DMA_PAGE_SIZE)
404 dev_priv->dma_pages[i].used = SAVAGE_DMA_PAGE_SIZE;
406 dev_priv->dma_pages[i].used = n;
407 n -= SAVAGE_DMA_PAGE_SIZE;
409 dev_priv->current_dma_page = --i;
411 DRM_DEBUG("cur=%u, cur->used=%u, n=%u\n",
412 i, dev_priv->dma_pages[i].used, n);
414 savage_dma_wait(dev_priv, dev_priv->current_dma_page);
419 static void savage_dma_flush(drm_savage_private_t *dev_priv)
421 unsigned int first = dev_priv->first_dma_page;
422 unsigned int cur = dev_priv->current_dma_page;
424 unsigned int wrap, pad, align, len, i;
425 unsigned long phys_addr;
429 dev_priv->dma_pages[cur].used == dev_priv->dma_pages[cur].flushed)
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;
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);
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;
448 *dma_ptr++ = BCI_CMD_WAIT;
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;
462 DRM_DEBUG("phys_addr=%lx, len=%u\n",
463 phys_addr | dev_priv->dma_type, len);
466 BCI_SET_REGISTERS(SAVAGE_DMABUFADDR, 1);
467 BCI_WRITE(phys_addr | dev_priv->dma_type);
470 /* fix alignment of the start of the next block */
471 dev_priv->dma_pages[cur].used += align;
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;
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 */
488 if (cur == dev_priv->nr_dma_pages)
490 dev_priv->first_dma_page = dev_priv->current_dma_page = cur;
492 dev_priv->first_dma_page = cur;
493 dev_priv->dma_pages[cur].flushed = dev_priv->dma_pages[i].used;
495 SET_AGE(&dev_priv->last_dma_age, event, wrap);
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);
502 static void savage_fake_dma_flush(drm_savage_private_t *dev_priv)
507 if (dev_priv->first_dma_page == dev_priv->current_dma_page &&
508 dev_priv->dma_pages[dev_priv->current_dma_page].used == 0)
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);
515 for (i = dev_priv->first_dma_page;
516 i <= dev_priv->current_dma_page && dev_priv->dma_pages[i].used;
518 uint32_t *dma_ptr = (uint32_t *)dev_priv->cmd_dma->handle +
519 i * SAVAGE_DMA_PAGE_SIZE;
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);
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]);
532 dev_priv->dma_pages[i].used = 0;
535 /* reset to first page */
536 dev_priv->first_dma_page = dev_priv->current_dma_page = 0;
539 int savage_driver_load(drm_device_t *dev, unsigned long chipset)
541 drm_savage_private_t *dev_priv;
543 dev_priv = drm_alloc(sizeof(drm_savage_private_t), DRM_MEM_DRIVER);
544 if (dev_priv == NULL)
545 return DRM_ERR(ENOMEM);
547 memset(dev_priv, 0, sizeof(drm_savage_private_t));
548 dev->dev_private = (void *)dev_priv;
550 dev_priv->chipset = (enum savage_family)chipset;
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.
561 int savage_driver_firstopen(drm_device_t *dev)
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
569 unsigned int fb_rsrc, aper_rsrc;
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)) {
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;
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
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);
602 DRM_ERROR("strange pci_resource_len %08lx\n",
603 drm_get_resource_len(dev, 0));
605 } else if (dev_priv->chipset != S3_SUPERSAVAGE &&
606 dev_priv->chipset != S3_SAVAGE2000) {
607 mmio_base = drm_get_resource_start(dev, 0);
609 fb_base = drm_get_resource_start(dev, 1);
610 fb_size = SAVAGE_FB_SIZE_S4;
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
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);
623 DRM_ERROR("strange pci_resource_len %08lx\n",
624 drm_get_resource_len(dev, 1));
627 mmio_base = drm_get_resource_start(dev, 0);
629 fb_base = drm_get_resource_start(dev, 1);
630 fb_size = drm_get_resource_len(dev, 1);
632 aperture_base = drm_get_resource_start(dev, 2);
633 /* Automatic MTRR setup will do the right thing. */
636 ret = drm_addmap(dev, mmio_base, SAVAGE_MMIO_SIZE, _DRM_REGISTERS,
637 _DRM_READ_ONLY, &dev_priv->mmio);
641 ret = drm_addmap(dev, fb_base, fb_size, _DRM_FRAME_BUFFER,
642 _DRM_WRITE_COMBINING, &dev_priv->fb);
646 ret = drm_addmap(dev, aperture_base, SAVAGE_APERTURE_SIZE,
647 _DRM_FRAME_BUFFER, _DRM_WRITE_COMBINING,
648 &dev_priv->aperture);
656 * Delete MTRRs and free device-private data.
658 void savage_driver_lastclose(drm_device_t *dev)
660 drm_savage_private_t *dev_priv = dev->dev_private;
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);
670 int savage_driver_unload(drm_device_t *dev)
672 drm_savage_private_t *dev_priv = dev->dev_private;
674 drm_free(dev_priv, sizeof(drm_savage_private_t), DRM_MEM_DRIVER);
679 static int savage_do_init_bci(drm_device_t *dev, drm_savage_init_t *init)
681 drm_savage_private_t *dev_priv = dev->dev_private;
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);
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);
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);
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;
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;
711 dev_priv->texture_offset = init->texture_offset;
712 dev_priv->texture_size = init->texture_size;
715 if (!dev_priv->sarea) {
716 DRM_ERROR("could not find sarea!\n");
717 savage_do_cleanup_bci(dev);
718 return DRM_ERR(EINVAL);
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);
728 dev_priv->status = NULL;
730 if (dev_priv->dma_type == SAVAGE_DMA_AGP && init->buffers_offset) {
731 dev->agp_buffer_map = drm_core_findmap(dev,
732 init->buffers_offset);
733 if (!dev->agp_buffer_map) {
734 DRM_ERROR("could not find DMA buffer region!\n");
735 savage_do_cleanup_bci(dev);
736 return DRM_ERR(EINVAL);
738 drm_core_ioremap(dev->agp_buffer_map, dev);
739 if (!dev->agp_buffer_map) {
740 DRM_ERROR("failed to ioremap DMA buffer region!\n");
741 savage_do_cleanup_bci(dev);
742 return DRM_ERR(ENOMEM);
745 if (init->agp_textures_offset) {
746 dev_priv->agp_textures =
747 drm_core_findmap(dev, init->agp_textures_offset);
748 if (!dev_priv->agp_textures) {
749 DRM_ERROR("could not find agp texture region!\n");
750 savage_do_cleanup_bci(dev);
751 return DRM_ERR(EINVAL);
754 dev_priv->agp_textures = NULL;
757 if (init->cmd_dma_offset) {
758 if (S3_SAVAGE3D_SERIES(dev_priv->chipset)) {
759 DRM_ERROR("command DMA not supported on "
760 "Savage3D/MX/IX.\n");
761 savage_do_cleanup_bci(dev);
762 return DRM_ERR(EINVAL);
764 if (dev->dma && dev->dma->buflist) {
765 DRM_ERROR("command and vertex DMA not supported "
766 "at the same time.\n");
767 savage_do_cleanup_bci(dev);
768 return DRM_ERR(EINVAL);
770 dev_priv->cmd_dma = drm_core_findmap(dev, init->cmd_dma_offset);
771 if (!dev_priv->cmd_dma) {
772 DRM_ERROR("could not find command DMA region!\n");
773 savage_do_cleanup_bci(dev);
774 return DRM_ERR(EINVAL);
776 if (dev_priv->dma_type == SAVAGE_DMA_AGP) {
777 if (dev_priv->cmd_dma->type != _DRM_AGP) {
778 DRM_ERROR("AGP command DMA region is not a "
780 savage_do_cleanup_bci(dev);
781 return DRM_ERR(EINVAL);
783 drm_core_ioremap(dev_priv->cmd_dma, dev);
784 if (!dev_priv->cmd_dma->handle) {
785 DRM_ERROR("failed to ioremap command "
787 savage_do_cleanup_bci(dev);
788 return DRM_ERR(ENOMEM);
790 } else if (dev_priv->cmd_dma->type != _DRM_CONSISTENT) {
791 DRM_ERROR("PCI command DMA region is not a "
792 "_DRM_CONSISTENT map!\n");
793 savage_do_cleanup_bci(dev);
794 return DRM_ERR(EINVAL);
797 dev_priv->cmd_dma = NULL;
800 dev_priv->dma_flush = savage_dma_flush;
801 if (!dev_priv->cmd_dma) {
802 DRM_DEBUG("falling back to faked command DMA.\n");
803 dev_priv->fake_dma.offset = 0;
804 dev_priv->fake_dma.size = SAVAGE_FAKE_DMA_SIZE;
805 dev_priv->fake_dma.type = _DRM_SHM;
806 dev_priv->fake_dma.handle = drm_alloc(SAVAGE_FAKE_DMA_SIZE,
808 if (!dev_priv->fake_dma.handle) {
809 DRM_ERROR("could not allocate faked DMA buffer!\n");
810 savage_do_cleanup_bci(dev);
811 return DRM_ERR(ENOMEM);
813 dev_priv->cmd_dma = &dev_priv->fake_dma;
814 dev_priv->dma_flush = savage_fake_dma_flush;
817 dev_priv->sarea_priv =
818 (drm_savage_sarea_t *)((uint8_t *)dev_priv->sarea->handle +
819 init->sarea_priv_offset);
821 /* setup bitmap descriptors */
823 unsigned int color_tile_format;
824 unsigned int depth_tile_format;
825 unsigned int front_stride, back_stride, depth_stride;
826 if (dev_priv->chipset <= S3_SAVAGE4) {
827 color_tile_format = dev_priv->fb_bpp == 16 ?
828 SAVAGE_BD_TILE_16BPP : SAVAGE_BD_TILE_32BPP;
829 depth_tile_format = dev_priv->depth_bpp == 16 ?
830 SAVAGE_BD_TILE_16BPP : SAVAGE_BD_TILE_32BPP;
832 color_tile_format = SAVAGE_BD_TILE_DEST;
833 depth_tile_format = SAVAGE_BD_TILE_DEST;
835 front_stride = dev_priv->front_pitch / (dev_priv->fb_bpp / 8);
836 back_stride = dev_priv->back_pitch / (dev_priv->fb_bpp / 8);
838 dev_priv->depth_pitch / (dev_priv->depth_bpp / 8);
840 dev_priv->front_bd = front_stride | SAVAGE_BD_BW_DISABLE |
841 (dev_priv->fb_bpp << SAVAGE_BD_BPP_SHIFT) |
842 (color_tile_format << SAVAGE_BD_TILE_SHIFT);
844 dev_priv-> back_bd = back_stride | SAVAGE_BD_BW_DISABLE |
845 (dev_priv->fb_bpp << SAVAGE_BD_BPP_SHIFT) |
846 (color_tile_format << SAVAGE_BD_TILE_SHIFT);
848 dev_priv->depth_bd = depth_stride | SAVAGE_BD_BW_DISABLE |
849 (dev_priv->depth_bpp << SAVAGE_BD_BPP_SHIFT) |
850 (depth_tile_format << SAVAGE_BD_TILE_SHIFT);
853 /* setup status and bci ptr */
854 dev_priv->event_counter = 0;
855 dev_priv->event_wrap = 0;
856 dev_priv->bci_ptr = (volatile uint32_t *)
857 ((uint8_t *)dev_priv->mmio->handle + SAVAGE_BCI_OFFSET);
858 if (S3_SAVAGE3D_SERIES(dev_priv->chipset)) {
859 dev_priv->status_used_mask = SAVAGE_FIFO_USED_MASK_S3D;
861 dev_priv->status_used_mask = SAVAGE_FIFO_USED_MASK_S4;
863 if (dev_priv->status != NULL) {
864 dev_priv->status_ptr =
865 (volatile uint32_t *)dev_priv->status->handle;
866 dev_priv->wait_fifo = savage_bci_wait_fifo_shadow;
867 dev_priv->wait_evnt = savage_bci_wait_event_shadow;
868 dev_priv->status_ptr[1023] = dev_priv->event_counter;
870 dev_priv->status_ptr = NULL;
871 if (S3_SAVAGE3D_SERIES(dev_priv->chipset)) {
872 dev_priv->wait_fifo = savage_bci_wait_fifo_s3d;
874 dev_priv->wait_fifo = savage_bci_wait_fifo_s4;
876 dev_priv->wait_evnt = savage_bci_wait_event_reg;
879 /* cliprect functions */
880 if (S3_SAVAGE3D_SERIES(dev_priv->chipset))
881 dev_priv->emit_clip_rect = savage_emit_clip_rect_s3d;
883 dev_priv->emit_clip_rect = savage_emit_clip_rect_s4;
885 if (savage_freelist_init(dev) < 0) {
886 DRM_ERROR("could not initialize freelist\n");
887 savage_do_cleanup_bci(dev);
888 return DRM_ERR(ENOMEM);
891 if (savage_dma_init(dev_priv) < 0) {
892 DRM_ERROR("could not initialize command DMA\n");
893 savage_do_cleanup_bci(dev);
894 return DRM_ERR(ENOMEM);
900 int savage_do_cleanup_bci(drm_device_t *dev)
902 drm_savage_private_t *dev_priv = dev->dev_private;
904 if (dev_priv->cmd_dma == &dev_priv->fake_dma) {
905 if (dev_priv->fake_dma.handle)
906 drm_free(dev_priv->fake_dma.handle,
907 SAVAGE_FAKE_DMA_SIZE, DRM_MEM_DRIVER);
908 } else if (dev_priv->cmd_dma && dev_priv->cmd_dma->handle &&
909 dev_priv->cmd_dma->type == _DRM_AGP &&
910 dev_priv->dma_type == SAVAGE_DMA_AGP)
911 drm_core_ioremapfree(dev_priv->cmd_dma, dev);
913 if (dev_priv->dma_type == SAVAGE_DMA_AGP &&
914 dev->agp_buffer_map && dev->agp_buffer_map->handle) {
915 drm_core_ioremapfree(dev->agp_buffer_map, dev);
916 /* make sure the next instance (which may be running
917 * in PCI mode) doesn't try to use an old
919 dev->agp_buffer_map = NULL;
922 if (dev_priv->dma_pages)
923 drm_free(dev_priv->dma_pages,
924 sizeof(drm_savage_dma_page_t)*dev_priv->nr_dma_pages,
930 static int savage_bci_init(DRM_IOCTL_ARGS)
933 drm_savage_init_t init;
935 LOCK_TEST_WITH_RETURN(dev, filp);
937 DRM_COPY_FROM_USER_IOCTL(init, (drm_savage_init_t __user *)data,
941 case SAVAGE_INIT_BCI:
942 return savage_do_init_bci(dev, &init);
943 case SAVAGE_CLEANUP_BCI:
944 return savage_do_cleanup_bci(dev);
947 return DRM_ERR(EINVAL);
950 static int savage_bci_event_emit(DRM_IOCTL_ARGS)
953 drm_savage_private_t *dev_priv = dev->dev_private;
954 drm_savage_event_emit_t event;
958 LOCK_TEST_WITH_RETURN(dev, filp);
960 DRM_COPY_FROM_USER_IOCTL(event, (drm_savage_event_emit_t __user *)data,
963 event.count = savage_bci_emit_event(dev_priv, event.flags);
964 event.count |= dev_priv->event_wrap << 16;
965 DRM_COPY_TO_USER_IOCTL((drm_savage_event_emit_t __user *)data,
966 event, sizeof(event));
970 static int savage_bci_event_wait(DRM_IOCTL_ARGS)
973 drm_savage_private_t *dev_priv = dev->dev_private;
974 drm_savage_event_wait_t event;
975 unsigned int event_e, hw_e;
976 unsigned int event_w, hw_w;
980 DRM_COPY_FROM_USER_IOCTL(event, (drm_savage_event_wait_t __user *)data,
983 UPDATE_EVENT_COUNTER();
984 if (dev_priv->status_ptr)
985 hw_e = dev_priv->status_ptr[1] & 0xffff;
987 hw_e = SAVAGE_READ(SAVAGE_STATUS_WORD1) & 0xffff;
988 hw_w = dev_priv->event_wrap;
989 if (hw_e > dev_priv->event_counter)
990 hw_w--; /* hardware hasn't passed the last wrap yet */
992 event_e = event.count & 0xffff;
993 event_w = event.count >> 16;
995 /* Don't need to wait if
996 * - event counter wrapped since the event was emitted or
997 * - the hardware has advanced up to or over the event to wait for.
999 if (event_w < hw_w || (event_w == hw_w && event_e <= hw_e) )
1002 return dev_priv->wait_evnt(dev_priv, event_e);
1006 * DMA buffer management
1009 static int savage_bci_get_buffers(DRMFILE filp, drm_device_t *dev, drm_dma_t *d)
1014 for (i = d->granted_count; i < d->request_count; i++) {
1015 buf = savage_freelist_get(dev);
1017 return DRM_ERR(EAGAIN);
1021 if (DRM_COPY_TO_USER(&d->request_indices[i],
1022 &buf->idx, sizeof(buf->idx)))
1023 return DRM_ERR(EFAULT);
1024 if (DRM_COPY_TO_USER(&d->request_sizes[i],
1025 &buf->total, sizeof(buf->total)))
1026 return DRM_ERR(EFAULT);
1033 int savage_bci_buffers(DRM_IOCTL_ARGS)
1036 drm_device_dma_t *dma = dev->dma;
1040 LOCK_TEST_WITH_RETURN(dev, filp);
1042 DRM_COPY_FROM_USER_IOCTL(d, (drm_dma_t __user *)data, sizeof(d));
1044 /* Please don't send us buffers.
1046 if (d.send_count != 0) {
1047 DRM_ERROR("Process %d trying to send %d buffers via drmDMA\n",
1048 DRM_CURRENTPID, d.send_count);
1049 return DRM_ERR(EINVAL);
1052 /* We'll send you buffers.
1054 if (d.request_count < 0 || d.request_count > dma->buf_count) {
1055 DRM_ERROR("Process %d trying to get %d buffers (of %d max)\n",
1056 DRM_CURRENTPID, d.request_count, dma->buf_count);
1057 return DRM_ERR(EINVAL);
1060 d.granted_count = 0;
1062 if (d.request_count) {
1063 ret = savage_bci_get_buffers(filp, dev, &d);
1066 DRM_COPY_TO_USER_IOCTL((drm_dma_t __user *)data, d, sizeof(d));
1071 void savage_reclaim_buffers(drm_device_t *dev, DRMFILE filp)
1073 drm_device_dma_t *dma = dev->dma;
1074 drm_savage_private_t *dev_priv = dev->dev_private;
1084 /*i830_flush_queue(dev);*/
1086 for (i = 0; i < dma->buf_count; i++) {
1087 drm_buf_t *buf = dma->buflist[i];
1088 drm_savage_buf_priv_t *buf_priv = buf->dev_private;
1090 if (buf->filp == filp && buf_priv &&
1091 buf_priv->next == NULL && buf_priv->prev == NULL) {
1093 DRM_DEBUG("reclaimed from client\n");
1094 event = savage_bci_emit_event(dev_priv, SAVAGE_WAIT_3D);
1095 SET_AGE(&buf_priv->age, event, dev_priv->event_wrap);
1096 savage_freelist_put(dev, buf);
1100 drm_core_reclaim_buffers(dev, filp);
1103 drm_ioctl_desc_t savage_ioctls[] = {
1104 [DRM_IOCTL_NR(DRM_SAVAGE_BCI_INIT)] = {savage_bci_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
1105 [DRM_IOCTL_NR(DRM_SAVAGE_BCI_CMDBUF)] = {savage_bci_cmdbuf, DRM_AUTH},
1106 [DRM_IOCTL_NR(DRM_SAVAGE_BCI_EVENT_EMIT)] = {savage_bci_event_emit, DRM_AUTH},
1107 [DRM_IOCTL_NR(DRM_SAVAGE_BCI_EVENT_WAIT)] = {savage_bci_event_wait, DRM_AUTH},
1110 int savage_max_ioctl = DRM_ARRAY_SIZE(savage_ioctls);