1 /* mga_dma.c -- DMA support for mga g200/g400 -*- linux-c -*-
2 * Created: Mon Dec 13 01:50:01 1999 by jhartmann@precisioninsight.com
4 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
5 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
15 * The above copyright notice and this permission notice (including the next
16 * paragraph) shall be included in all copies or substantial portions of the
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22 * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
23 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
24 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
25 * DEALINGS IN THE SOFTWARE.
30 * DMA support for MGA G200 / G400.
32 * \author Rickard E. (Rik) Faith <faith@valinux.com>
33 * \author Jeff Hartmann <jhartmann@valinux.com>
34 * \author Keith Whitwell <keith@tungstengraphics.com>
35 * \author Gareth Hughes <gareth@valinux.com>
40 #include "drm_sarea.h"
44 #define MGA_DEFAULT_USEC_TIMEOUT 10000
45 #define MGA_FREELIST_DEBUG 0
47 static int mga_do_cleanup_dma( drm_device_t
*dev
);
49 /* ================================================================
53 int mga_do_wait_for_idle( drm_mga_private_t
*dev_priv
)
59 for ( i
= 0 ; i
< dev_priv
->usec_timeout
; i
++ ) {
60 status
= MGA_READ( MGA_STATUS
) & MGA_ENGINE_IDLE_MASK
;
61 if ( status
== MGA_ENDPRDMASTS
) {
62 MGA_WRITE8( MGA_CRTC_INDEX
, 0 );
69 DRM_ERROR( "failed!\n" );
70 DRM_INFO( " status=0x%08x\n", status
);
72 return DRM_ERR(EBUSY
);
75 static int mga_do_dma_reset( drm_mga_private_t
*dev_priv
)
77 drm_mga_sarea_t
*sarea_priv
= dev_priv
->sarea_priv
;
78 drm_mga_primary_buffer_t
*primary
= &dev_priv
->prim
;
82 /* The primary DMA stream should look like new right about now.
85 primary
->space
= primary
->size
;
86 primary
->last_flush
= 0;
88 sarea_priv
->last_wrap
= 0;
90 /* FIXME: Reset counters, buffer ages etc...
93 /* FIXME: What else do we need to reinitialize? WARP stuff?
99 /* ================================================================
103 void mga_do_dma_flush( drm_mga_private_t
*dev_priv
)
105 drm_mga_primary_buffer_t
*primary
= &dev_priv
->prim
;
112 /* We need to wait so that we can do an safe flush */
113 for ( i
= 0 ; i
< dev_priv
->usec_timeout
; i
++ ) {
114 status
= MGA_READ( MGA_STATUS
) & MGA_ENGINE_IDLE_MASK
;
115 if ( status
== MGA_ENDPRDMASTS
) break;
119 if ( primary
->tail
== primary
->last_flush
) {
120 DRM_DEBUG( " bailing out...\n" );
124 tail
= primary
->tail
+ dev_priv
->primary
->offset
;
126 /* We need to pad the stream between flushes, as the card
127 * actually (partially?) reads the first of these commands.
128 * See page 4-16 in the G400 manual, middle of the page or so.
132 DMA_BLOCK( MGA_DMAPAD
, 0x00000000,
133 MGA_DMAPAD
, 0x00000000,
134 MGA_DMAPAD
, 0x00000000,
135 MGA_DMAPAD
, 0x00000000 );
139 primary
->last_flush
= primary
->tail
;
141 head
= MGA_READ( MGA_PRIMADDRESS
);
143 if ( head
<= tail
) {
144 primary
->space
= primary
->size
- primary
->tail
;
146 primary
->space
= head
- tail
;
149 DRM_DEBUG( " head = 0x%06lx\n", head
- dev_priv
->primary
->offset
);
150 DRM_DEBUG( " tail = 0x%06lx\n", tail
- dev_priv
->primary
->offset
);
151 DRM_DEBUG( " space = 0x%06x\n", primary
->space
);
153 mga_flush_write_combine();
154 MGA_WRITE(MGA_PRIMEND
, tail
| dev_priv
->dma_access
);
156 DRM_DEBUG( "done.\n" );
159 void mga_do_dma_wrap_start( drm_mga_private_t
*dev_priv
)
161 drm_mga_primary_buffer_t
*primary
= &dev_priv
->prim
;
168 DMA_BLOCK( MGA_DMAPAD
, 0x00000000,
169 MGA_DMAPAD
, 0x00000000,
170 MGA_DMAPAD
, 0x00000000,
171 MGA_DMAPAD
, 0x00000000 );
175 tail
= primary
->tail
+ dev_priv
->primary
->offset
;
178 primary
->last_flush
= 0;
179 primary
->last_wrap
++;
181 head
= MGA_READ( MGA_PRIMADDRESS
);
183 if ( head
== dev_priv
->primary
->offset
) {
184 primary
->space
= primary
->size
;
186 primary
->space
= head
- dev_priv
->primary
->offset
;
189 DRM_DEBUG( " head = 0x%06lx\n",
190 head
- dev_priv
->primary
->offset
);
191 DRM_DEBUG( " tail = 0x%06x\n", primary
->tail
);
192 DRM_DEBUG( " wrap = %d\n", primary
->last_wrap
);
193 DRM_DEBUG( " space = 0x%06x\n", primary
->space
);
195 mga_flush_write_combine();
196 MGA_WRITE(MGA_PRIMEND
, tail
| dev_priv
->dma_access
);
198 set_bit( 0, &primary
->wrapped
);
199 DRM_DEBUG( "done.\n" );
202 void mga_do_dma_wrap_end( drm_mga_private_t
*dev_priv
)
204 drm_mga_primary_buffer_t
*primary
= &dev_priv
->prim
;
205 drm_mga_sarea_t
*sarea_priv
= dev_priv
->sarea_priv
;
206 u32 head
= dev_priv
->primary
->offset
;
209 sarea_priv
->last_wrap
++;
210 DRM_DEBUG( " wrap = %d\n", sarea_priv
->last_wrap
);
212 mga_flush_write_combine();
213 MGA_WRITE( MGA_PRIMADDRESS
, head
| MGA_DMA_GENERAL
);
215 clear_bit( 0, &primary
->wrapped
);
216 DRM_DEBUG( "done.\n" );
220 /* ================================================================
221 * Freelist management
224 #define MGA_BUFFER_USED ~0
225 #define MGA_BUFFER_FREE 0
227 #if MGA_FREELIST_DEBUG
228 static void mga_freelist_print( drm_device_t
*dev
)
230 drm_mga_private_t
*dev_priv
= dev
->dev_private
;
231 drm_mga_freelist_t
*entry
;
234 DRM_INFO( "current dispatch: last=0x%x done=0x%x\n",
235 dev_priv
->sarea_priv
->last_dispatch
,
236 (unsigned int)(MGA_READ( MGA_PRIMADDRESS
) -
237 dev_priv
->primary
->offset
) );
238 DRM_INFO( "current freelist:\n" );
240 for ( entry
= dev_priv
->head
->next
; entry
; entry
= entry
->next
) {
241 DRM_INFO( " %p idx=%2d age=0x%x 0x%06lx\n",
242 entry
, entry
->buf
->idx
, entry
->age
.head
,
243 entry
->age
.head
- dev_priv
->primary
->offset
);
249 static int mga_freelist_init( drm_device_t
*dev
, drm_mga_private_t
*dev_priv
)
251 drm_device_dma_t
*dma
= dev
->dma
;
253 drm_mga_buf_priv_t
*buf_priv
;
254 drm_mga_freelist_t
*entry
;
256 DRM_DEBUG( "count=%d\n", dma
->buf_count
);
258 dev_priv
->head
= drm_alloc( sizeof(drm_mga_freelist_t
),
260 if ( dev_priv
->head
== NULL
)
261 return DRM_ERR(ENOMEM
);
263 memset( dev_priv
->head
, 0, sizeof(drm_mga_freelist_t
) );
264 SET_AGE( &dev_priv
->head
->age
, MGA_BUFFER_USED
, 0 );
266 for ( i
= 0 ; i
< dma
->buf_count
; i
++ ) {
267 buf
= dma
->buflist
[i
];
268 buf_priv
= buf
->dev_private
;
270 entry
= drm_alloc( sizeof(drm_mga_freelist_t
),
273 return DRM_ERR(ENOMEM
);
275 memset( entry
, 0, sizeof(drm_mga_freelist_t
) );
277 entry
->next
= dev_priv
->head
->next
;
278 entry
->prev
= dev_priv
->head
;
279 SET_AGE( &entry
->age
, MGA_BUFFER_FREE
, 0 );
282 if ( dev_priv
->head
->next
!= NULL
)
283 dev_priv
->head
->next
->prev
= entry
;
284 if ( entry
->next
== NULL
)
285 dev_priv
->tail
= entry
;
287 buf_priv
->list_entry
= entry
;
288 buf_priv
->discard
= 0;
289 buf_priv
->dispatched
= 0;
291 dev_priv
->head
->next
= entry
;
297 static void mga_freelist_cleanup( drm_device_t
*dev
)
299 drm_mga_private_t
*dev_priv
= dev
->dev_private
;
300 drm_mga_freelist_t
*entry
;
301 drm_mga_freelist_t
*next
;
304 entry
= dev_priv
->head
;
307 drm_free( entry
, sizeof(drm_mga_freelist_t
), DRM_MEM_DRIVER
);
311 dev_priv
->head
= dev_priv
->tail
= NULL
;
315 /* FIXME: Still needed?
317 static void mga_freelist_reset( drm_device_t
*dev
)
319 drm_device_dma_t
*dma
= dev
->dma
;
321 drm_mga_buf_priv_t
*buf_priv
;
324 for ( i
= 0 ; i
< dma
->buf_count
; i
++ ) {
325 buf
= dma
->buflist
[i
];
326 buf_priv
= buf
->dev_private
;
327 SET_AGE( &buf_priv
->list_entry
->age
,
328 MGA_BUFFER_FREE
, 0 );
333 static drm_buf_t
*mga_freelist_get( drm_device_t
*dev
)
335 drm_mga_private_t
*dev_priv
= dev
->dev_private
;
336 drm_mga_freelist_t
*next
;
337 drm_mga_freelist_t
*prev
;
338 drm_mga_freelist_t
*tail
= dev_priv
->tail
;
342 head
= MGA_READ( MGA_PRIMADDRESS
);
343 wrap
= dev_priv
->sarea_priv
->last_wrap
;
345 DRM_DEBUG( " tail=0x%06lx %d\n",
347 tail
->age
.head
- dev_priv
->primary
->offset
: 0,
349 DRM_DEBUG( " head=0x%06lx %d\n",
350 head
- dev_priv
->primary
->offset
, wrap
);
352 if ( TEST_AGE( &tail
->age
, head
, wrap
) ) {
353 prev
= dev_priv
->tail
->prev
;
354 next
= dev_priv
->tail
;
356 next
->prev
= next
->next
= NULL
;
357 dev_priv
->tail
= prev
;
358 SET_AGE( &next
->age
, MGA_BUFFER_USED
, 0 );
362 DRM_DEBUG( "returning NULL!\n" );
366 int mga_freelist_put( drm_device_t
*dev
, drm_buf_t
*buf
)
368 drm_mga_private_t
*dev_priv
= dev
->dev_private
;
369 drm_mga_buf_priv_t
*buf_priv
= buf
->dev_private
;
370 drm_mga_freelist_t
*head
, *entry
, *prev
;
372 DRM_DEBUG( "age=0x%06lx wrap=%d\n",
373 buf_priv
->list_entry
->age
.head
-
374 dev_priv
->primary
->offset
,
375 buf_priv
->list_entry
->age
.wrap
);
377 entry
= buf_priv
->list_entry
;
378 head
= dev_priv
->head
;
380 if ( buf_priv
->list_entry
->age
.head
== MGA_BUFFER_USED
) {
381 SET_AGE( &entry
->age
, MGA_BUFFER_FREE
, 0 );
382 prev
= dev_priv
->tail
;
398 /* ================================================================
399 * DMA initialization, cleanup
403 int mga_driver_preinit(drm_device_t
*dev
, unsigned long flags
)
405 drm_mga_private_t
* dev_priv
;
407 dev_priv
= drm_alloc(sizeof(drm_mga_private_t
), DRM_MEM_DRIVER
);
409 return DRM_ERR(ENOMEM
);
411 dev
->dev_private
= (void *)dev_priv
;
412 memset(dev_priv
, 0, sizeof(drm_mga_private_t
));
414 dev_priv
->usec_timeout
= MGA_DEFAULT_USEC_TIMEOUT
;
415 dev_priv
->chipset
= flags
;
422 * Bootstrap the driver for AGP DMA.
425 * Investigate whether there is any benifit to storing the WARP microcode in
426 * AGP memory. If not, the microcode may as well always be put in PCI
430 * This routine needs to set dma_bs->agp_mode to the mode actually configured
431 * in the hardware. Looking just at the Linux AGP driver code, I don't see
432 * an easy way to determine this.
434 * \sa mga_do_dma_bootstrap, mga_do_pci_dma_bootstrap
436 static int mga_do_agp_dma_bootstrap(drm_device_t
* dev
,
437 drm_mga_dma_bootstrap_t
* dma_bs
)
439 drm_mga_private_t
* const dev_priv
= (drm_mga_private_t
*) dev
->dev_private
;
440 unsigned int warp_size
= mga_warp_microcode_size(dev_priv
);
443 const unsigned secondary_size
= dma_bs
->secondary_bin_count
444 * dma_bs
->secondary_bin_size
;
445 const unsigned agp_size
= (dma_bs
->agp_size
<< 20);
452 err
= drm_agp_acquire(dev
);
454 DRM_ERROR("Unable to acquire AGP\n");
458 err
= drm_agp_info(dev
, &info
);
460 DRM_ERROR("Unable to get AGP info\n");
464 mode
.mode
= (info
.mode
& ~0x07) | dma_bs
->agp_mode
;
465 err
= drm_agp_enable(dev
, mode
);
467 DRM_ERROR("Unable to enable AGP (mode = 0x%lx)\n", mode
.mode
);
472 /* In addition to the usual AGP mode configuration, the G200 AGP cards
473 * need to have the AGP mode "manually" set.
476 if (dev_priv
->chipset
== MGA_CARD_TYPE_G200
) {
477 if (mode
.mode
& 0x02) {
478 MGA_WRITE(MGA_AGP_PLL
, MGA_AGP2XPLL_ENABLE
);
481 MGA_WRITE(MGA_AGP_PLL
, MGA_AGP2XPLL_DISABLE
);
486 /* Allocate and bind AGP memory. */
487 dev_priv
->agp_pages
= agp_size
/ PAGE_SIZE
;
488 dev_priv
->agp_mem
= drm_alloc_agp( dev
, dev_priv
->agp_pages
, 0 );
489 if (dev_priv
->agp_mem
== NULL
) {
490 dev_priv
->agp_pages
= 0;
491 DRM_ERROR("Unable to allocate %uMB AGP memory\n",
493 return DRM_ERR(ENOMEM
);
496 err
= drm_bind_agp( dev_priv
->agp_mem
, 0 );
498 DRM_ERROR("Unable to bind AGP memory\n");
502 /* Make drm_addbufs happy by not trying to create a mapping for less
505 if (warp_size
< PAGE_SIZE
)
506 warp_size
= PAGE_SIZE
;
509 err
= drm_addmap( dev
, offset
, warp_size
,
510 _DRM_AGP
, _DRM_READ_ONLY
, & dev_priv
->warp
);
512 DRM_ERROR("Unable to map WARP microcode\n");
517 err
= drm_addmap( dev
, offset
, dma_bs
->primary_size
,
518 _DRM_AGP
, _DRM_READ_ONLY
, & dev_priv
->primary
);
520 DRM_ERROR("Unable to map primary DMA region\n");
524 offset
+= dma_bs
->primary_size
;
525 err
= drm_addmap( dev
, offset
, secondary_size
,
526 _DRM_AGP
, 0, & dev
->agp_buffer_map
);
528 DRM_ERROR("Unable to map secondary DMA region\n");
532 (void) memset( &req
, 0, sizeof(req
) );
533 req
.count
= dma_bs
->secondary_bin_count
;
534 req
.size
= dma_bs
->secondary_bin_size
;
535 req
.flags
= _DRM_AGP_BUFFER
;
536 req
.agp_start
= offset
;
538 err
= drm_addbufs_agp( dev
, & req
);
540 DRM_ERROR("Unable to add secondary DMA buffers\n");
544 offset
+= secondary_size
;
545 err
= drm_addmap( dev
, offset
, agp_size
- offset
,
546 _DRM_AGP
, 0, & dev_priv
->agp_textures
);
548 DRM_ERROR("Unable to map AGP texture region\n");
552 drm_core_ioremap(dev_priv
->warp
, dev
);
553 drm_core_ioremap(dev_priv
->primary
, dev
);
554 drm_core_ioremap(dev
->agp_buffer_map
, dev
);
556 if (!dev_priv
->warp
->handle
||
557 !dev_priv
->primary
->handle
|| !dev
->agp_buffer_map
->handle
) {
558 DRM_ERROR("failed to ioremap agp regions! (%p, %p, %p)\n",
559 dev_priv
->warp
->handle
, dev_priv
->primary
->handle
,
560 dev
->agp_buffer_map
->handle
);
561 return DRM_ERR(ENOMEM
);
564 dev_priv
->dma_access
= MGA_PAGPXFER
;
565 dev_priv
->wagp_enable
= MGA_WAGP_ENABLE
;
567 DRM_INFO("Initialized card for AGP DMA.\n");
571 static int mga_do_agp_dma_bootstrap(drm_device_t
* dev
,
572 drm_mga_dma_bootstrap_t
* dma_bs
)
579 * Bootstrap the driver for PCI DMA.
582 * The algorithm for decreasing the size of the primary DMA buffer could be
583 * better. The size should be rounded up to the nearest page size, then
584 * decrease the request size by a single page each pass through the loop.
587 * Determine whether the maximum address passed to drm_pci_alloc is correct.
588 * The same goes for drm_addbufs_pci.
590 * \sa mga_do_dma_bootstrap, mga_do_agp_dma_bootstrap
592 static int mga_do_pci_dma_bootstrap(drm_device_t
* dev
,
593 drm_mga_dma_bootstrap_t
* dma_bs
)
595 drm_mga_private_t
* const dev_priv
= (drm_mga_private_t
*) dev
->dev_private
;
596 unsigned int warp_size
= mga_warp_microcode_size(dev_priv
);
597 unsigned int primary_size
;
598 unsigned int bin_count
;
603 if (dev
->dma
== NULL
) {
604 DRM_ERROR("dev->dma is NULL\n");
605 return DRM_ERR(EFAULT
);
608 /* Make drm_addbufs happy by not trying to create a mapping for less
611 if (warp_size
< PAGE_SIZE
)
612 warp_size
= PAGE_SIZE
;
614 /* The proper alignment is 0x100 for this mapping */
615 err
= drm_addmap(dev
, 0, warp_size
, _DRM_CONSISTENT
,
616 _DRM_READ_ONLY
, &dev_priv
->warp
);
618 DRM_ERROR("Unable to create mapping for WARP microcode\n");
622 /* Other than the bottom two bits being used to encode other
623 * information, there don't appear to be any restrictions on the
624 * alignment of the primary or secondary DMA buffers.
627 for ( primary_size
= dma_bs
->primary_size
629 ; primary_size
>>= 1 ) {
630 /* The proper alignment for this mapping is 0x04 */
631 err
= drm_addmap(dev
, 0, primary_size
, _DRM_CONSISTENT
,
632 _DRM_READ_ONLY
, &dev_priv
->primary
);
638 DRM_ERROR("Unable to allocate primary DMA region\n");
639 return DRM_ERR(ENOMEM
);
642 if (dev_priv
->primary
->size
!= dma_bs
->primary_size
) {
643 DRM_INFO("Primary DMA buffer size reduced from %u to %u.\n",
644 dma_bs
->primary_size
,
645 (unsigned) dev_priv
->primary
->size
);
646 dma_bs
->primary_size
= dev_priv
->primary
->size
;
649 for ( bin_count
= dma_bs
->secondary_bin_count
652 (void) memset( &req
, 0, sizeof(req
) );
653 req
.count
= bin_count
;
654 req
.size
= dma_bs
->secondary_bin_size
;
656 err
= drm_addbufs_pci( dev
, & req
);
662 if (bin_count
== 0) {
663 DRM_ERROR("Unable to add secondary DMA buffers\n");
667 if (bin_count
!= dma_bs
->secondary_bin_count
) {
668 DRM_INFO("Secondary PCI DMA buffer bin count reduced from %u "
669 "to %u.\n", dma_bs
->secondary_bin_count
, bin_count
);
671 dma_bs
->secondary_bin_count
= bin_count
;
674 dev_priv
->dma_access
= 0;
675 dev_priv
->wagp_enable
= 0;
677 dma_bs
->agp_mode
= 0;
679 DRM_INFO("Initialized card for PCI DMA.\n");
684 static int mga_do_dma_bootstrap(drm_device_t
* dev
,
685 drm_mga_dma_bootstrap_t
* dma_bs
)
687 const int is_agp
= (dma_bs
->agp_mode
!= 0) && drm_device_is_agp(dev
);
689 drm_mga_private_t
* const dev_priv
=
690 (drm_mga_private_t
*) dev
->dev_private
;
693 dev_priv
->used_new_dma_init
= 1;
695 /* The first steps are the same for both PCI and AGP based DMA. Map
696 * the cards MMIO registers and map a status page.
698 err
= drm_addmap( dev
, dev_priv
->mmio_base
, dev_priv
->mmio_size
,
699 _DRM_REGISTERS
, _DRM_READ_ONLY
, & dev_priv
->mmio
);
701 DRM_ERROR("Unable to map MMIO region\n");
706 err
= drm_addmap( dev
, 0, SAREA_MAX
, _DRM_SHM
,
707 _DRM_READ_ONLY
| _DRM_LOCKED
| _DRM_KERNEL
,
708 & dev_priv
->status
);
710 DRM_ERROR("Unable to map status region\n");
715 /* The DMA initialization procedure is slightly different for PCI and
716 * AGP cards. AGP cards just allocate a large block of AGP memory and
717 * carve off portions of it for internal uses. The remaining memory
718 * is returned to user-mode to be used for AGP textures.
721 err
= mga_do_agp_dma_bootstrap(dev
, dma_bs
);
724 /* If we attempted to initialize the card for AGP DMA but failed,
725 * clean-up any mess that may have been created.
729 mga_do_cleanup_dma(dev
);
733 /* Not only do we want to try and initialized PCI cards for PCI DMA,
734 * but we also try to initialized AGP cards that could not be
735 * initialized for AGP DMA. This covers the case where we have an AGP
736 * card in a system with an unsupported AGP chipset. In that case the
737 * card will be detected as AGP, but we won't be able to allocate any
741 if (!is_agp
|| err
) {
742 err
= mga_do_pci_dma_bootstrap(dev
, dma_bs
);
749 int mga_dma_bootstrap(DRM_IOCTL_ARGS
)
752 drm_mga_dma_bootstrap_t bootstrap
;
756 DRM_COPY_FROM_USER_IOCTL(bootstrap
,
757 (drm_mga_dma_bootstrap_t __user
*) data
,
760 err
= mga_do_dma_bootstrap(dev
, & bootstrap
);
762 static const int modes
[] = { 0, 1, 2, 2, 4, 4, 4, 4 };
763 const drm_mga_private_t
* const dev_priv
=
764 (drm_mga_private_t
*) dev
->dev_private
;
766 if (dev_priv
->agp_textures
!= NULL
) {
767 bootstrap
.texture_handle
= dev_priv
->agp_textures
->offset
;
768 bootstrap
.texture_size
= dev_priv
->agp_textures
->size
;
771 bootstrap
.texture_handle
= 0;
772 bootstrap
.texture_size
= 0;
775 bootstrap
.agp_mode
= modes
[ bootstrap
.agp_mode
& 0x07 ];
776 if (DRM_COPY_TO_USER( (void __user
*) data
, & bootstrap
,
777 sizeof(bootstrap
))) {
778 err
= DRM_ERR(EFAULT
);
782 mga_do_cleanup_dma(dev
);
788 static int mga_do_init_dma( drm_device_t
*dev
, drm_mga_init_t
*init
)
790 drm_mga_private_t
*dev_priv
;
795 dev_priv
= dev
->dev_private
;
798 dev_priv
->clear_cmd
= MGA_DWGCTL_CLEAR
| MGA_ATYPE_BLK
;
800 dev_priv
->clear_cmd
= MGA_DWGCTL_CLEAR
| MGA_ATYPE_RSTR
;
802 dev_priv
->maccess
= init
->maccess
;
804 dev_priv
->fb_cpp
= init
->fb_cpp
;
805 dev_priv
->front_offset
= init
->front_offset
;
806 dev_priv
->front_pitch
= init
->front_pitch
;
807 dev_priv
->back_offset
= init
->back_offset
;
808 dev_priv
->back_pitch
= init
->back_pitch
;
810 dev_priv
->depth_cpp
= init
->depth_cpp
;
811 dev_priv
->depth_offset
= init
->depth_offset
;
812 dev_priv
->depth_pitch
= init
->depth_pitch
;
814 /* FIXME: Need to support AGP textures...
816 dev_priv
->texture_offset
= init
->texture_offset
[0];
817 dev_priv
->texture_size
= init
->texture_size
[0];
821 if (!dev_priv
->sarea
) {
822 DRM_ERROR("failed to find sarea!\n");
823 return DRM_ERR(EINVAL
);
826 if (! dev_priv
->used_new_dma_init
) {
828 dev_priv
->dma_access
= MGA_PAGPXFER
;
829 dev_priv
->wagp_enable
= MGA_WAGP_ENABLE
;
831 dev_priv
->status
= drm_core_findmap(dev
, init
->status_offset
);
832 if (!dev_priv
->status
) {
833 DRM_ERROR("failed to find status page!\n");
834 return DRM_ERR(EINVAL
);
836 dev_priv
->mmio
= drm_core_findmap(dev
, init
->mmio_offset
);
837 if (!dev_priv
->mmio
) {
838 DRM_ERROR("failed to find mmio region!\n");
839 return DRM_ERR(EINVAL
);
841 dev_priv
->warp
= drm_core_findmap(dev
, init
->warp_offset
);
842 if (!dev_priv
->warp
) {
843 DRM_ERROR("failed to find warp microcode region!\n");
844 return DRM_ERR(EINVAL
);
846 dev_priv
->primary
= drm_core_findmap(dev
, init
->primary_offset
);
847 if (!dev_priv
->primary
) {
848 DRM_ERROR("failed to find primary dma region!\n");
849 return DRM_ERR(EINVAL
);
851 dev
->agp_buffer_token
= init
->buffers_offset
;
852 dev
->agp_buffer_map
= drm_core_findmap(dev
, init
->buffers_offset
);
853 if (!dev
->agp_buffer_map
) {
854 DRM_ERROR("failed to find dma buffer region!\n");
855 return DRM_ERR(EINVAL
);
858 drm_core_ioremap(dev_priv
->warp
, dev
);
859 drm_core_ioremap(dev_priv
->primary
, dev
);
860 drm_core_ioremap(dev
->agp_buffer_map
, dev
);
863 dev_priv
->sarea_priv
=
864 (drm_mga_sarea_t
*)((u8
*)dev_priv
->sarea
->handle
+
865 init
->sarea_priv_offset
);
867 if (!dev_priv
->warp
->handle
||
868 !dev_priv
->primary
->handle
||
869 ((dev_priv
->dma_access
!= 0) &&
870 ((dev
->agp_buffer_map
== NULL
) ||
871 (dev
->agp_buffer_map
->handle
== NULL
)))) {
872 DRM_ERROR("failed to ioremap agp regions!\n");
873 return DRM_ERR(ENOMEM
);
876 ret
= mga_warp_install_microcode(dev_priv
);
878 DRM_ERROR("failed to install WARP ucode!\n");
882 ret
= mga_warp_init(dev_priv
);
884 DRM_ERROR("failed to init WARP engine!\n");
888 dev_priv
->prim
.status
= (u32
*)dev_priv
->status
->handle
;
890 mga_do_wait_for_idle( dev_priv
);
892 /* Init the primary DMA registers.
894 MGA_WRITE( MGA_PRIMADDRESS
,
895 dev_priv
->primary
->offset
| MGA_DMA_GENERAL
);
897 MGA_WRITE( MGA_PRIMPTR
,
898 virt_to_bus((void *)dev_priv
->prim
.status
) |
899 MGA_PRIMPTREN0
| /* Soft trap, SECEND, SETUPEND */
900 MGA_PRIMPTREN1
); /* DWGSYNC */
903 dev_priv
->prim
.start
= (u8
*)dev_priv
->primary
->handle
;
904 dev_priv
->prim
.end
= ((u8
*)dev_priv
->primary
->handle
905 + dev_priv
->primary
->size
);
906 dev_priv
->prim
.size
= dev_priv
->primary
->size
;
908 dev_priv
->prim
.tail
= 0;
909 dev_priv
->prim
.space
= dev_priv
->prim
.size
;
910 dev_priv
->prim
.wrapped
= 0;
912 dev_priv
->prim
.last_flush
= 0;
913 dev_priv
->prim
.last_wrap
= 0;
915 dev_priv
->prim
.high_mark
= 256 * DMA_BLOCK_SIZE
;
917 dev_priv
->prim
.status
[0] = dev_priv
->primary
->offset
;
918 dev_priv
->prim
.status
[1] = 0;
920 dev_priv
->sarea_priv
->last_wrap
= 0;
921 dev_priv
->sarea_priv
->last_frame
.head
= 0;
922 dev_priv
->sarea_priv
->last_frame
.wrap
= 0;
924 if (mga_freelist_init(dev
, dev_priv
) < 0) {
925 DRM_ERROR("could not initialize freelist\n");
926 return DRM_ERR(ENOMEM
);
932 static int mga_do_cleanup_dma( drm_device_t
*dev
)
937 /* Make sure interrupts are disabled here because the uninstall ioctl
938 * may not have been called from userspace and after dev_private
939 * is freed, it's too late.
941 if ( dev
->irq_enabled
) drm_irq_uninstall(dev
);
943 if ( dev
->dev_private
) {
944 drm_mga_private_t
*dev_priv
= dev
->dev_private
;
946 if ((dev_priv
->warp
!= NULL
)
947 && (dev_priv
->warp
->type
!= _DRM_CONSISTENT
))
948 drm_core_ioremapfree(dev_priv
->warp
, dev
);
950 if ((dev_priv
->primary
!= NULL
)
951 && (dev_priv
->primary
->type
!= _DRM_CONSISTENT
))
952 drm_core_ioremapfree(dev_priv
->primary
, dev
);
954 if (dev
->agp_buffer_map
!= NULL
)
955 drm_core_ioremapfree(dev
->agp_buffer_map
, dev
);
957 if (dev_priv
->used_new_dma_init
) {
959 if (dev_priv
->agp_mem
!= NULL
) {
960 dev_priv
->agp_textures
= NULL
;
961 drm_unbind_agp(dev_priv
->agp_mem
);
963 drm_free_agp(dev_priv
->agp_mem
, dev_priv
->agp_pages
);
964 dev_priv
->agp_pages
= 0;
965 dev_priv
->agp_mem
= NULL
;
968 if ((dev
->agp
!= NULL
) && dev
->agp
->acquired
) {
969 err
= drm_agp_release(dev
);
972 dev_priv
->used_new_dma_init
= 0;
975 dev_priv
->warp
= NULL
;
976 dev_priv
->primary
= NULL
;
977 dev_priv
->mmio
= NULL
;
978 dev_priv
->status
= NULL
;
979 dev_priv
->sarea
= NULL
;
980 dev_priv
->sarea_priv
= NULL
;
981 dev
->agp_buffer_map
= NULL
;
983 memset(&dev_priv
->prim
, 0, sizeof(dev_priv
->prim
));
984 dev_priv
->warp_pipe
= 0;
985 memset(dev_priv
->warp_pipe_phys
, 0, sizeof(dev_priv
->warp_pipe_phys
));
987 if (dev_priv
->head
!= NULL
) {
988 mga_freelist_cleanup(dev
);
995 int mga_dma_init( DRM_IOCTL_ARGS
)
1001 LOCK_TEST_WITH_RETURN( dev
, filp
);
1003 DRM_COPY_FROM_USER_IOCTL(init
, (drm_mga_init_t __user
*) data
,
1006 switch ( init
.func
) {
1008 err
= mga_do_init_dma(dev
, &init
);
1010 (void) mga_do_cleanup_dma(dev
);
1013 case MGA_CLEANUP_DMA
:
1014 return mga_do_cleanup_dma( dev
);
1017 return DRM_ERR(EINVAL
);
1021 /* ================================================================
1022 * Primary DMA stream management
1025 int mga_dma_flush( DRM_IOCTL_ARGS
)
1028 drm_mga_private_t
*dev_priv
= (drm_mga_private_t
*)dev
->dev_private
;
1031 LOCK_TEST_WITH_RETURN( dev
, filp
);
1033 DRM_COPY_FROM_USER_IOCTL( lock
, (drm_lock_t __user
*)data
, sizeof(lock
) );
1035 DRM_DEBUG( "%s%s%s\n",
1036 (lock
.flags
& _DRM_LOCK_FLUSH
) ? "flush, " : "",
1037 (lock
.flags
& _DRM_LOCK_FLUSH_ALL
) ? "flush all, " : "",
1038 (lock
.flags
& _DRM_LOCK_QUIESCENT
) ? "idle, " : "" );
1040 WRAP_WAIT_WITH_RETURN( dev_priv
);
1042 if ( lock
.flags
& (_DRM_LOCK_FLUSH
| _DRM_LOCK_FLUSH_ALL
) ) {
1043 mga_do_dma_flush( dev_priv
);
1046 if ( lock
.flags
& _DRM_LOCK_QUIESCENT
) {
1048 int ret
= mga_do_wait_for_idle( dev_priv
);
1050 DRM_INFO( "%s: -EBUSY\n", __FUNCTION__
);
1053 return mga_do_wait_for_idle( dev_priv
);
1060 int mga_dma_reset( DRM_IOCTL_ARGS
)
1063 drm_mga_private_t
*dev_priv
= (drm_mga_private_t
*)dev
->dev_private
;
1065 LOCK_TEST_WITH_RETURN( dev
, filp
);
1067 return mga_do_dma_reset( dev_priv
);
1071 /* ================================================================
1072 * DMA buffer management
1075 static int mga_dma_get_buffers( DRMFILE filp
,
1076 drm_device_t
*dev
, drm_dma_t
*d
)
1081 for ( i
= d
->granted_count
; i
< d
->request_count
; i
++ ) {
1082 buf
= mga_freelist_get( dev
);
1083 if ( !buf
) return DRM_ERR(EAGAIN
);
1087 if ( DRM_COPY_TO_USER( &d
->request_indices
[i
],
1088 &buf
->idx
, sizeof(buf
->idx
) ) )
1089 return DRM_ERR(EFAULT
);
1090 if ( DRM_COPY_TO_USER( &d
->request_sizes
[i
],
1091 &buf
->total
, sizeof(buf
->total
) ) )
1092 return DRM_ERR(EFAULT
);
1099 int mga_dma_buffers( DRM_IOCTL_ARGS
)
1102 drm_device_dma_t
*dma
= dev
->dma
;
1103 drm_mga_private_t
*dev_priv
= (drm_mga_private_t
*)dev
->dev_private
;
1104 drm_dma_t __user
*argp
= (void __user
*)data
;
1108 LOCK_TEST_WITH_RETURN( dev
, filp
);
1110 DRM_COPY_FROM_USER_IOCTL( d
, argp
, sizeof(d
) );
1112 /* Please don't send us buffers.
1114 if ( d
.send_count
!= 0 ) {
1115 DRM_ERROR( "Process %d trying to send %d buffers via drmDMA\n",
1116 DRM_CURRENTPID
, d
.send_count
);
1117 return DRM_ERR(EINVAL
);
1120 /* We'll send you buffers.
1122 if ( d
.request_count
< 0 || d
.request_count
> dma
->buf_count
) {
1123 DRM_ERROR( "Process %d trying to get %d buffers (of %d max)\n",
1124 DRM_CURRENTPID
, d
.request_count
, dma
->buf_count
);
1125 return DRM_ERR(EINVAL
);
1128 WRAP_TEST_WITH_RETURN( dev_priv
);
1130 d
.granted_count
= 0;
1132 if ( d
.request_count
) {
1133 ret
= mga_dma_get_buffers( filp
, dev
, &d
);
1136 DRM_COPY_TO_USER_IOCTL( argp
, d
, sizeof(d
) );
1142 * Called just before the module is unloaded.
1144 int mga_driver_postcleanup(drm_device_t
* dev
)
1146 drm_free(dev
->dev_private
, sizeof(drm_mga_private_t
), DRM_MEM_DRIVER
);
1147 dev
->dev_private
= NULL
;
1153 * Called when the last opener of the device is closed.
1155 void mga_driver_pretakedown(drm_device_t
* dev
)
1157 mga_do_cleanup_dma( dev
);
1160 int mga_driver_dma_quiescent(drm_device_t
*dev
)
1162 drm_mga_private_t
*dev_priv
= dev
->dev_private
;
1163 return mga_do_wait_for_idle( dev_priv
);