graphics/radeon/PCI_GART.c

29 //! create actual GART buffer
35 	gart->buffer.size = size = (size + B_PAGE_SIZE - 1) & ~(B_PAGE_SIZE - 1);
37 	// if this buffer is used for PCI BM, cache snooping
47 	// the write buffer pointer
50 	// the DMA buffer, we have to grant access for all apps
51 	gart->buffer.area = create_area("Radeon PCI GART buffer",
52 		&gart->buffer.ptr, B_ANY_KERNEL_ADDRESS,
56 	if (gart->buffer.area < 0) {
57 		SHOW_ERROR(1, "cannot create PCI GART buffer (%s)",
58 			strerror(gart->buffer.area));
59 		return gart->buffer.area;
62 	gart->buffer.unaligned_area = -1;
64 	memset( gart->buffer.ptr, 0, size );
78 	gart->buffer.size = size = (size + B_PAGE_SIZE - 1) & ~(B_PAGE_SIZE - 1);
85 	gart->buffer.unaligned_area = create_area( "Radeon PCI GART buffer",
90 	if (gart->buffer.unaligned_area < 0) {
91 		SHOW_ERROR( 1, "cannot create PCI GART buffer (%s)",
92 			strerror( gart->buffer.unaligned_area ));
93 		return gart->buffer.unaligned_area;
103 	gart->buffer.area = map_physical_memory( "Radeon aligned PCI GART buffer",
106 		B_READ_AREA | B_WRITE_AREA, &gart->buffer.ptr );
108 	if( gart->buffer.area < 0 ) {
109 		SHOW_ERROR0( 3, "cannot map buffer with WC" );
110 		gart->buffer.area = map_physical_memory( "Radeon aligned PCI GART buffer",
113 			B_READ_AREA | B_WRITE_AREA, &gart->buffer.ptr );
116 	if( gart->buffer.area < 0 ) {
117 		SHOW_ERROR0( 1, "cannot map GART buffer" );
118 		delete_area( gart->buffer.unaligned_area );
119 		gart->buffer.unaligned_area = -1;
120 		return gart->buffer.area;
123 	memset( gart->buffer.ptr, 0, size );
144 	num_pages = (gart->buffer.size + B_PAGE_SIZE - 1) & ~(B_PAGE_SIZE - 1);
185 	get_memory_map( gart->buffer.ptr, gart->buffer.size, map, map_count );
210 		SHOW_ERROR0( 0, "memory map of GART buffer too large!" );
235 // destroy GART buffer
238 	if( gart->buffer.area > 0 )
239 		delete_area( gart->buffer.area );
241 	if( gart->buffer.unaligned_area > 0 )
242 		delete_area( gart->buffer.unaligned_area );
244 	gart->buffer.area = gart->buffer.unaligned_area = -1;