2 * Copyright 2000-2001 VA Linux Systems, Inc.
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * on the rights to use, copy, modify, merge, publish, distribute, sub
9 * license, and/or sell copies of the Software, and to permit persons to whom
10 * the Software is furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
19 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
25 * Keith Whitwell <keith@tungstengraphics.com>
26 * Gareth Hughes <gareth@valinux.com>
32 #include "mgacontext.h"
33 #include "mga_xmesa.h"
35 void mgaCopyBuffer( __DRIdrawable *dPriv );
36 void mgaWaitForVBlank( mgaContextPtr mmesa );
38 void mgaGetILoadBufferLocked( mgaContextPtr mmesa );
39 void mgaFireILoadLocked( mgaContextPtr mmesa,
40 GLuint offset, GLuint length );
42 void mgaWaitAgeLocked( mgaContextPtr mmesa, int age );
44 void mgaFlushVertices( mgaContextPtr mmesa );
45 void mgaFlushVerticesLocked( mgaContextPtr mmesa );
46 int mgaFlushDMA( int fd, drmLockFlags flags );
48 void mgaInitIoctlFuncs( struct dd_function_table *functions );
50 #define FLUSH_BATCH(mmesa) do { \
51 if (MGA_DEBUG&DEBUG_VERBOSE_IOCTL) \
52 fprintf(stderr, "FLUSH_BATCH in %s\n", __FUNCTION__); \
53 if (mmesa->vertex_dma_buffer) mgaFlushVertices(mmesa); \
56 #define MGA_STATECHANGE(mmesa, flag) do { \
58 mmesa->dirty |= flag; \
62 extern drmBufPtr mga_get_buffer_ioctl( mgaContextPtr mmesa );
65 GLuint *mgaAllocDmaLow( mgaContextPtr mmesa, int bytes )
69 /* If there is no DMA buffer currently allocated or the currently
70 * allocated DMA buffer doesn't have enough room left for this request,
71 * a new buffer will need to be allocated.
73 if ( (mmesa->vertex_dma_buffer == NULL)
74 || ((mmesa->vertex_dma_buffer->used + bytes)
75 > mmesa->vertex_dma_buffer->total) ) {
76 LOCK_HARDWARE( mmesa );
78 /* In the case where the existing buffer does not have enough room,
79 * we need to flush it out to the hardware.
81 if ( mmesa->vertex_dma_buffer != NULL ) {
82 mgaFlushVerticesLocked( mmesa );
85 mmesa->vertex_dma_buffer = mga_get_buffer_ioctl( mmesa );
86 UNLOCK_HARDWARE( mmesa );
89 head = (GLuint *)((char *)mmesa->vertex_dma_buffer->address +
90 mmesa->vertex_dma_buffer->used);
92 mmesa->vertex_dma_buffer->used += bytes;
97 #define UPDATE_LOCK( mmesa, flags ) \
99 GLint ret = mgaFlushDMA( mmesa->driFd, flags ); \
101 drmCommandNone( mmesa->driFd, DRM_MGA_RESET ); \
102 UNLOCK_HARDWARE( mmesa ); \
103 fprintf( stderr, "%s: flush return = %s (%d), flags = 0x%08x\n", \
104 __FUNCTION__, strerror( -ret ), -ret, \
105 (unsigned)(flags) ); \