dev/drm/mga_dma.c

111 	u32 head, tail;
146 	head = MGA_READ(MGA_PRIMADDRESS);
148 	if (head <= tail) {
151 		primary->space = head - tail;
154 	DRM_DEBUG("   head = 0x%06lx\n", head - dev_priv->primary->offset);
167 	u32 head, tail;
185 	head = MGA_READ(MGA_PRIMADDRESS);
187 	if (head == dev_priv->primary->offset) {
190 		primary->space = head - dev_priv->primary->offset;
193 	DRM_DEBUG("   head = 0x%06lx\n", head - dev_priv->primary->offset);
209 	u32 head = dev_priv->primary->offset;
216 	MGA_WRITE(MGA_PRIMADDRESS, head | MGA_DMA_GENERAL);
242 	for (entry = dev_priv->head->next; entry; entry = entry->next) {
244 			 entry, entry->buf->idx, entry->age.head,
245 			 entry->age.head - dev_priv->primary->offset);
260 	dev_priv->head = drm_alloc(sizeof(drm_mga_freelist_t), DRM_MEM_DRIVER);
261 	if (dev_priv->head == NULL)
264 	memset(dev_priv->head, 0, sizeof(drm_mga_freelist_t));
265 	SET_AGE(&dev_priv->head->age, MGA_BUFFER_USED, 0);
277 		entry->next = dev_priv->head->next;
278 		entry->prev = dev_priv->head;
282 		if (dev_priv->head->next != NULL)
283 			dev_priv->head->next->prev = entry;
291 		dev_priv->head->next = entry;
304 	entry = dev_priv->head;
311 	dev_priv->head = dev_priv->tail = NULL;
338 	u32 head, wrap;
341 	head = MGA_READ(MGA_PRIMADDRESS);
345 		  tail->age.head ?
346 		  tail->age.head - dev_priv->primary->offset : 0,
348 	DRM_DEBUG("   head=0x%06lx %d\n",
349 		  head - dev_priv->primary->offset, wrap);
351 	if (TEST_AGE(&tail->age, head, wrap)) {
369 	drm_mga_freelist_t *head, *entry, *prev;
372 		  buf_priv->list_entry->age.head -
376 	head = dev_priv->head;
378 	if (buf_priv->list_entry->age.head == MGA_BUFFER_USED) {
385 		prev = head->next;
386 		head->next = entry;
388 		entry->prev = head;
565 		list_for_each_entry(_entry, &dev->maplist, head) {
931 	dev_priv->sarea_priv->last_frame.head = 0;
1006 		if (dev_priv->head != NULL) {