dev/drm/mga_dma.c

83 	drm_mga_primary_buffer_t *primary = &dev_priv->prim;
87 	/* The primary DMA stream should look like new right about now.
89 	primary->tail = 0;
90 	primary->space = primary->size;
91 	primary->last_flush = 0;
110 	drm_mga_primary_buffer_t *primary = &dev_priv->prim;
125 	if (primary->tail == primary->last_flush) {
130 	tail = primary->tail + dev_priv->primary->offset;
144 	primary->last_flush = primary->tail;
149 		primary->space = primary->size - primary->tail;
151 		primary->space = head - tail;
154 	DRM_DEBUG("   head = 0x%06lx\n", head - dev_priv->primary->offset);
155 	DRM_DEBUG("   tail = 0x%06lx\n", tail - dev_priv->primary->offset);
156 	DRM_DEBUG("  space = 0x%06x\n", primary->space);
166 	drm_mga_primary_buffer_t *primary = &dev_priv->prim;
179 	tail = primary->tail + dev_priv->primary->offset;
181 	primary->tail = 0;
182 	primary->last_flush = 0;
183 	primary->last_wrap++;
187 	if (head == dev_priv->primary->offset) {
188 		primary->space = primary->size;
190 		primary->space = head - dev_priv->primary->offset;
193 	DRM_DEBUG("   head = 0x%06lx\n", head - dev_priv->primary->offset);
194 	DRM_DEBUG("   tail = 0x%06x\n", primary->tail);
195 	DRM_DEBUG("   wrap = %d\n", primary->last_wrap);
196 	DRM_DEBUG("  space = 0x%06x\n", primary->space);
201 	set_bit(0, &primary->wrapped);
207 	drm_mga_primary_buffer_t *primary = &dev_priv->prim;
209 	u32 head = dev_priv->primary->offset;
218 	clear_bit(0, &primary->wrapped);
239 				dev_priv->primary->offset));
245 			 entry->age.head - dev_priv->primary->offset);
346 		  tail->age.head - dev_priv->primary->offset : 0,
349 		  head - dev_priv->primary->offset, wrap);
373 		  dev_priv->primary->offset, buf_priv->list_entry->age.wrap);
534 			 _DRM_AGP, _DRM_READ_ONLY, & dev_priv->primary);
536 		DRM_ERROR("Unable to map primary DMA region: %d\n", err);
585 	drm_core_ioremap(dev_priv->primary, dev);
589 	    !dev_priv->primary->virtual || !dev->agp_buffer_map->virtual) {
591 			  dev_priv->warp->virtual, dev_priv->primary->virtual,
607  * The algorithm for decreasing the size of the primary DMA buffer could be
651 	 * alignment of the primary or secondary DMA buffers.
658 				 _DRM_READ_ONLY, &dev_priv->primary);
664 		DRM_ERROR("Unable to allocate primary DMA region: %d\n", err);
668 	if (dev_priv->primary->size != dma_bs->primary_size) {
671 			 (unsigned)dev_priv->primary->size);
672 		dma_bs->primary_size = dev_priv->primary->size;
862 		dev_priv->primary = drm_core_findmap(dev, init->primary_offset);
863 		if (!dev_priv->primary) {
864 			DRM_ERROR("failed to find primary dma region!\n");
876 		drm_core_ioremap(dev_priv->primary, dev);
885 	    !dev_priv->primary->virtual ||
909 	/* Init the primary DMA registers.
911 	MGA_WRITE(MGA_PRIMADDRESS, dev_priv->primary->offset | MGA_DMA_GENERAL);
913 	dev_priv->prim.start = (u8 *) dev_priv->primary->virtual;
914 	dev_priv->prim.end = ((u8 *) dev_priv->primary->virtual
915 			      + dev_priv->primary->size);
916 	dev_priv->prim.size = dev_priv->primary->size;
927 	dev_priv->prim.status[0] = dev_priv->primary->offset;
961 		if ((dev_priv->primary != NULL)
962 		    && (dev_priv->primary->type != _DRM_CONSISTENT))
963 			drm_core_ioremapfree(dev_priv->primary, dev);
990 		dev_priv->primary = NULL;