Merged mga-0-0-3-branch

- New security model for i810
- Enable i810 dri by default
- New indexed vertex path for mga
- Mga kernel driver rework
- Removed dead files in i810 driver

1 files changed, 186 insertions, 227 deletions

diff --git a/linux/mga_dma.c b/linux/mga_dma.c
index 371706f4..fe6a7b52 100644
--- a/linux/mga_dma.c
+++ b/linux/mga_dma.c
@@ -53,6 +53,7 @@ static unsigned long mga_alloc_page(drm_device_t *dev)
 {
 	unsigned long address;
    
+	DRM_DEBUG("%s\n", __FUNCTION__);
 	address = __get_free_page(GFP_KERNEL);
 	if(address == 0UL) {
 		return 0;
@@ -65,6 +66,8 @@ static unsigned long mga_alloc_page(drm_device_t *dev)
 
 static void mga_free_page(drm_device_t *dev, unsigned long page)
 {
+	DRM_DEBUG("%s\n", __FUNCTION__);
+
 	if(page == 0UL) {
 		return;
 	}
@@ -80,9 +83,11 @@ static void mga_delay(void)
    	return;
 }
 
-static void mga_flush_write_combine(void)
+void mga_flush_write_combine(void)
 {
    	int xchangeDummy;
+	DRM_DEBUG("%s\n", __FUNCTION__);
+
    	__asm__ volatile(" push %%eax ; xchg %%eax, %0 ; pop %%eax" : : "m" (xchangeDummy));
    	__asm__ volatile(" push %%eax ; push %%ebx ; push %%ecx ; push %%edx ;"
 			 " movl $0,%%eax ; cpuid ; pop %%edx ; pop %%ecx ; pop %%ebx ;"
@@ -94,18 +99,6 @@ static void mga_flush_write_combine(void)
 #define MGA_BUF_USED 	0xffffffff
 #define MGA_BUF_FREE	0
 
-static void mga_freelist_debug(drm_mga_freelist_t *item)
-{
-   	if(item->buf != NULL) {
-     		DRM_DEBUG("buf index : %d\n", item->buf->idx);
-	} else {
-	   	DRM_DEBUG("Freelist head\n");
-	}
-   	DRM_DEBUG("item->age : %x\n", item->age);
-   	DRM_DEBUG("item->next : %p\n", item->next);
-   	DRM_DEBUG("item->prev : %p\n", item->prev);
-}
-
 static int mga_freelist_init(drm_device_t *dev)
 {
       	drm_device_dma_t *dma = dev->dma;
@@ -114,7 +107,9 @@ static int mga_freelist_init(drm_device_t *dev)
       	drm_mga_private_t *dev_priv = (drm_mga_private_t *)dev->dev_private;
    	drm_mga_freelist_t *item;
    	int i;
-   
+
+	DRM_DEBUG("%s\n", __FUNCTION__);
+
    	dev_priv->head = drm_alloc(sizeof(drm_mga_freelist_t), DRM_MEM_DRIVER);
 	if(dev_priv->head == NULL) return -ENOMEM;
    	memset(dev_priv->head, 0, sizeof(drm_mga_freelist_t));
@@ -136,19 +131,10 @@ static int mga_freelist_init(drm_device_t *dev)
 	   	item->buf = buf;
 	   	buf_priv->my_freelist = item;
 		buf_priv->discard = 0;
+		buf_priv->dispatched = 0;
 	   	dev_priv->head->next = item;
 	}
    
-   	item = dev_priv->head;
-   	while(item) {
-		mga_freelist_debug(item);
-		item = item->next;
-	}
-   	DRM_DEBUG("Head\n");
-   	mga_freelist_debug(dev_priv->head);
-   	DRM_DEBUG("Tail\n");
-   	mga_freelist_debug(dev_priv->tail);
-   
    	return 0;
 }
 
@@ -158,6 +144,8 @@ static void mga_freelist_cleanup(drm_device_t *dev)
    	drm_mga_freelist_t *item;
    	drm_mga_freelist_t *prev;
 
+	DRM_DEBUG("%s\n", __FUNCTION__);
+
    	item = dev_priv->head;
    	while(item) {
 	   	prev = item;
@@ -174,14 +162,14 @@ static inline void mga_dma_quiescent(drm_device_t *dev)
 	drm_device_dma_t  *dma      = dev->dma;
 	drm_mga_private_t *dev_priv = (drm_mga_private_t *)dev->dev_private;
 	drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
-	__volatile__ unsigned int *status =
-		(__volatile__ unsigned int *)dev_priv->status_page;
    	unsigned long end;
 	int i;
 
+	DRM_DEBUG("%s\n", __FUNCTION__);
 	end = jiffies + (HZ*3);
     	while(1) {
-		if(!test_and_set_bit(0, &dev_priv->dispatch_lock)) {
+		if(!test_and_set_bit(MGA_IN_DISPATCH, 
+				     &dev_priv->dispatch_status)) {
 			break;
 		}
 	   	if((signed)(end - jiffies) <= 0) {
@@ -205,51 +193,25 @@ static inline void mga_dma_quiescent(drm_device_t *dev)
 		}
 		for (i = 0 ; i < 2000 ; i++) mga_delay();	  
 	}
-    	DRM_DEBUG("status[1] : %x last_sync_tag : %x\n", status[1],
-		  dev_priv->last_sync_tag);
     	sarea_priv->dirty |= MGA_DMA_FLUSH;
 
 out_status:
-    	clear_bit(0, &dev_priv->dispatch_lock);
+    	clear_bit(MGA_IN_DISPATCH, &dev_priv->dispatch_status);
 out_nolock:
 }
 
-#define FREELIST_INITIAL (MGA_DMA_BUF_NR * 2)
-#define FREELIST_COMPARE(age) ((age >> 2))
-
-unsigned int mga_create_sync_tag(drm_device_t *dev)
+static void mga_reset_freelist(drm_device_t *dev)
 {
-      	drm_mga_private_t *dev_priv = 
-     		(drm_mga_private_t *) dev->dev_private;
-   	unsigned int temp;
-      	drm_buf_t *buf;
+   	drm_device_dma_t  *dma      = dev->dma;
+   	drm_buf_t *buf;
    	drm_mga_buf_priv_t *buf_priv;
-      	drm_device_dma_t *dma = dev->dma;
-   	int i;
-   
-   	dev_priv->sync_tag++;
-   
-   	if(dev_priv->sync_tag < FREELIST_INITIAL) {
-	   	dev_priv->sync_tag = FREELIST_INITIAL;
-	}
-   	if(dev_priv->sync_tag > 0x3fffffff) {
-		mga_flush_queue(dev);
-	   	mga_dma_quiescent(dev);
-	    
-	   	for (i = 0; i < dma->buf_count; i++) {
-			buf = dma->buflist[ i ];
-			buf_priv = buf->dev_private;
-			buf_priv->my_freelist->age = MGA_BUF_FREE;
-		}
-	   	
-	   	dev_priv->sync_tag = FREELIST_INITIAL;
-	}
-   	temp = dev_priv->sync_tag << 2;
-
-	dev_priv->sarea_priv->last_enqueue = temp;
+	int i;
 
-   	DRM_DEBUG("sync_tag : %x\n", temp);
-   	return temp;
+   	for (i = 0; i < dma->buf_count; i++) {
+	   	buf = dma->buflist[ i ];
+	        buf_priv = buf->dev_private;
+		buf_priv->my_freelist->age = MGA_BUF_FREE;
+	}
 }
 
 /* Least recently used :
@@ -258,23 +220,52 @@ unsigned int mga_create_sync_tag(drm_device_t *dev)
 
 drm_buf_t *mga_freelist_get(drm_device_t *dev)
 {
+   	DECLARE_WAITQUEUE(entry, current);
    	drm_mga_private_t *dev_priv = 
      		(drm_mga_private_t *) dev->dev_private;
-   	__volatile__ unsigned int *status = 
-     		(__volatile__ unsigned int *)dev_priv->status_page;
 	drm_mga_freelist_t *prev;
    	drm_mga_freelist_t *next;
+	static int failed = 0;
+
+	DRM_DEBUG("%s : tail->age : %d last_prim_age : %d\n", __FUNCTION__,
+	       dev_priv->tail->age, dev_priv->last_prim_age);
    
-   	if((dev_priv->tail->age >> 2) <= FREELIST_COMPARE(status[1])) {
+	if(failed >= 1000 && dev_priv->tail->age >= dev_priv->last_prim_age) {
+		DRM_DEBUG("I'm waiting on the freelist!!! %d\n", 
+		       dev_priv->last_prim_age);
+	   	set_bit(MGA_IN_GETBUF, &dev_priv->dispatch_status);
+		current->state = TASK_INTERRUPTIBLE;
+	   	add_wait_queue(&dev_priv->buf_queue, &entry);
+	   	for (;;) {
+		   	mga_dma_schedule(dev, 0);
+		   	if(!test_bit(MGA_IN_GETBUF, 
+				     &dev_priv->dispatch_status)) 
+				break;
+		   	atomic_inc(&dev->total_sleeps);
+		   	schedule();
+		   	if (signal_pending(current)) {
+				clear_bit(MGA_IN_GETBUF,
+					  &dev_priv->dispatch_status);
+			   	goto failed_getbuf;
+			}
+		}
+	   	current->state = TASK_RUNNING;
+	   	remove_wait_queue(&dev_priv->buf_queue, &entry);
+	}
+   
+   	if(dev_priv->tail->age < dev_priv->last_prim_age) {
 		prev = dev_priv->tail->prev;
 	   	next = dev_priv->tail;
 	   	prev->next = NULL;
 	   	next->prev = next->next = NULL;
 	   	dev_priv->tail = prev;
 	   	next->age = MGA_BUF_USED;
+		failed = 0;
 	   	return next->buf;
-	} 
+	}
 
+failed_getbuf:
+	failed++;
    	return NULL;
 }
 
@@ -287,6 +278,8 @@ int mga_freelist_put(drm_device_t *dev, drm_buf_t *buf)
    	drm_mga_freelist_t *head;
    	drm_mga_freelist_t *next;
 
+	DRM_DEBUG("%s\n", __FUNCTION__);
+
    	if(buf_priv->my_freelist->age == MGA_BUF_USED) {
 		/* Discarded buffer, put it on the tail */
 		next = buf_priv->my_freelist;
@@ -313,32 +306,6 @@ int mga_freelist_put(drm_device_t *dev, drm_buf_t *buf)
    	return 0;
 }
 
-static void mga_print_all_primary(drm_device_t *dev)
-{
-      	drm_mga_private_t *dev_priv = dev->dev_private;
-   	drm_mga_prim_buf_t *prim;
-   	int i;
-
-   	DRM_DEBUG("Full list of primarys\n");
-     	for(i = 0; i < MGA_NUM_PRIM_BUFS; i++) {
-		prim = dev_priv->prim_bufs[i];
-		DRM_DEBUG("index : %d num_dwords : %d "
-			  "max_dwords : %d phy_head : %x\n",
-			  prim->idx, prim->num_dwords, 
-			  prim->max_dwords, prim->phys_head);
-		DRM_DEBUG("sec_used : %d swap_pending : %x "
-			  "in_use : %x force_fire : %d\n",
-			  prim->sec_used, prim->swap_pending, 
-			  prim->in_use, atomic_read(&prim->force_fire));
-		DRM_DEBUG("needs_overflow : %d\n", 
-			  atomic_read(&prim->needs_overflow));
-	}
-   
-   	DRM_DEBUG("current_idx : %d, next_idx : %d, last_idx : %d\n",
-		  dev_priv->next_prim->idx, dev_priv->last_prim->idx,
-		  dev_priv->current_prim->idx);
-}
-
 static int mga_init_primary_bufs(drm_device_t *dev, drm_mga_init_t *init)
 {
    	drm_mga_private_t *dev_priv = dev->dev_private;
@@ -346,10 +313,9 @@ static int mga_init_primary_bufs(drm_device_t *dev, drm_mga_init_t *init)
    	int i, temp, size_of_buf;
    	int offset = init->reserved_map_agpstart;
 
-   	DRM_DEBUG("mga_init_primary_bufs\n");
+	DRM_DEBUG("%s\n", __FUNCTION__);
    	dev_priv->primary_size = ((init->primary_size + PAGE_SIZE - 1) / 
 				  PAGE_SIZE) * PAGE_SIZE;
-   	DRM_DEBUG("primary_size\n");
    	size_of_buf = dev_priv->primary_size / MGA_NUM_PRIM_BUFS;
 	dev_priv->warp_ucode_size = init->warp_ucode_size;
    	dev_priv->prim_bufs = drm_alloc(sizeof(drm_mga_prim_buf_t *) * 
@@ -359,18 +325,12 @@ static int mga_init_primary_bufs(drm_device_t *dev, drm_mga_init_t *init)
 		DRM_ERROR("Unable to allocate memory for prim_buf\n");
 		return -ENOMEM;
 	}
-   	DRM_DEBUG("memset\n");
    	memset(dev_priv->prim_bufs, 
 	       0, sizeof(drm_mga_prim_buf_t *) * (MGA_NUM_PRIM_BUFS + 1));
    
    	temp = init->warp_ucode_size + dev_priv->primary_size;
 	temp = ((temp + PAGE_SIZE - 1) / PAGE_SIZE) * PAGE_SIZE;
 	   
-   	DRM_DEBUG("temp : %x\n", temp);
-   	DRM_DEBUG("dev->agp->base: %lx\n", dev->agp->base);
-   	DRM_DEBUG("init->reserved_map_agpstart: %x\n", 
-		  init->reserved_map_agpstart);
-   	DRM_DEBUG("ioremap\n");
 	dev_priv->ioremap = drm_ioremap(dev->agp->base + offset, 
 					temp);
 	if(dev_priv->ioremap == NULL) {
@@ -380,11 +340,9 @@ static int mga_init_primary_bufs(drm_device_t *dev, drm_mga_init_t *init)
    	init_waitqueue_head(&dev_priv->wait_queue);
    
    	for(i = 0; i < MGA_NUM_PRIM_BUFS; i++) {
-	   	DRM_DEBUG("For loop\n");
 	   	prim_buffer = drm_alloc(sizeof(drm_mga_prim_buf_t), 
 					DRM_MEM_DRIVER);
 	   	if(prim_buffer == NULL) return -ENOMEM;
-	   	DRM_DEBUG("memset\n");
 	   	memset(prim_buffer, 0, sizeof(drm_mga_prim_buf_t));
 	   	prim_buffer->phys_head = offset + dev->agp->base;
 	   	prim_buffer->current_dma_ptr = 
@@ -397,17 +355,18 @@ static int mga_init_primary_bufs(drm_device_t *dev, drm_mga_init_t *init)
 	   	prim_buffer->max_dwords -= 5; /* Leave room for the softrap */
 	   	prim_buffer->sec_used = 0;
 	   	prim_buffer->idx = i;
+		prim_buffer->prim_age = i + 1;
 	   	offset = offset + size_of_buf;
 	   	dev_priv->prim_bufs[i] = prim_buffer;
-	   	DRM_DEBUG("Looping\n");
 	}
 	dev_priv->current_prim_idx = 0;
         dev_priv->next_prim = 
 		dev_priv->last_prim = 
 		dev_priv->current_prim =
         	dev_priv->prim_bufs[0];
-   	set_bit(0, &dev_priv->current_prim->in_use);
-	DRM_DEBUG("init done\n");
+	dev_priv->next_prim_age = 2;	
+	dev_priv->last_prim_age = 1;
+   	set_bit(MGA_BUF_IN_USE, &dev_priv->current_prim->buffer_status);
    	return 0;
 }
 
@@ -421,9 +380,8 @@ void mga_fire_primary(drm_device_t *dev, drm_mga_prim_buf_t *prim)
    	int i;
    	int next_idx;
        	PRIMLOCALS;
-   
-    	DRM_DEBUG("mga_fire_primary\n");
-    	dev_priv->last_sync_tag = mga_create_sync_tag(dev); 
+
+   	DRM_DEBUG("%s\n", __FUNCTION__);
    	dev_priv->last_prim = prim;
    
  	/* We never check for overflow, b/c there is always room */
@@ -434,7 +392,7 @@ void mga_fire_primary(drm_device_t *dev, drm_mga_prim_buf_t *prim)
 	}
  	PRIMOUTREG( MGAREG_DMAPAD, 0);
  	PRIMOUTREG( MGAREG_DMAPAD, 0);
-       	PRIMOUTREG( MGAREG_DWGSYNC, dev_priv->last_sync_tag);
+       	PRIMOUTREG( MGAREG_DMAPAD, 0);
    	PRIMOUTREG( MGAREG_SOFTRAP, 0);
     	PRIMFINISH(prim);
 
@@ -469,13 +427,13 @@ void mga_fire_primary(drm_device_t *dev, drm_mga_prim_buf_t *prim)
 			for (i = 0 ; i < 4096 ; i++) mga_delay();
 		}
 	}
-	
+
    	mga_flush_write_combine();
     	atomic_inc(&dev_priv->pending_bufs);
-	atomic_inc(&dma->total_lost);
        	MGA_WRITE(MGAREG_PRIMADDRESS, phys_head | TT_GENERAL);
  	MGA_WRITE(MGAREG_PRIMEND, (phys_head + num_dwords * 4) | use_agp);
    	prim->num_dwords = 0;
+	sarea_priv->last_enqueue = prim->prim_age;
     
    	next_idx = prim->idx + 1;
     	if(next_idx >= MGA_NUM_PRIM_BUFS) 
@@ -487,11 +445,10 @@ void mga_fire_primary(drm_device_t *dev, drm_mga_prim_buf_t *prim)
  out_prim_wait:
 	prim->num_dwords = 0;
 	prim->sec_used = 0;
-	clear_bit(0, &prim->in_use);
+	clear_bit(MGA_BUF_IN_USE, &prim->buffer_status);
    	wake_up_interruptible(&dev_priv->wait_queue);
-	clear_bit(0, &prim->swap_pending);
-	clear_bit(0, &dev_priv->dispatch_lock);
-	atomic_dec(&dev_priv->pending_bufs);
+	clear_bit(MGA_BUF_SWAP_PENDING, &prim->buffer_status);
+	clear_bit(MGA_IN_DISPATCH, &dev_priv->dispatch_status);
 }
 
 int mga_advance_primary(drm_device_t *dev)
@@ -506,27 +463,28 @@ int mga_advance_primary(drm_device_t *dev)
    	/* This needs to reset the primary buffer if available,
 	 * we should collect stats on how many times it bites
 	 * it's tail */
+	DRM_DEBUG("%s\n", __FUNCTION__);
    
    	next_prim_idx = dev_priv->current_prim_idx + 1;
    	if(next_prim_idx >= MGA_NUM_PRIM_BUFS)
      		next_prim_idx = 0;
    	prim_buffer = dev_priv->prim_bufs[next_prim_idx];
-   	atomic_set(&dev_priv->in_wait, 1);
+	set_bit(MGA_IN_WAIT, &dev_priv->dispatch_status);
    
       	/* In use is cleared in interrupt handler */
    
-   	if(test_and_set_bit(0, &prim_buffer->in_use)) {
+   	if(test_and_set_bit(MGA_BUF_IN_USE, &prim_buffer->buffer_status)) {
 	   	add_wait_queue(&dev_priv->wait_queue, &entry);
+		current->state = TASK_INTERRUPTIBLE;
+
 	   	for (;;) {
-		   	current->state = TASK_INTERRUPTIBLE;
 		   	mga_dma_schedule(dev, 0);
-		   	if(!test_and_set_bit(0, &prim_buffer->in_use)) break;
+		   	if(!test_and_set_bit(MGA_BUF_IN_USE, 
+					     &prim_buffer->buffer_status)) 
+				break;
 		   	atomic_inc(&dev->total_sleeps);
 		   	atomic_inc(&dma->total_missed_sched);
-		   	mga_print_all_primary(dev);
-		   	DRM_DEBUG("Schedule in advance\n");
-		   	/* Three second delay */
-		   	schedule_timeout(HZ*3);
+		   	schedule();
 		   	if (signal_pending(current)) {
 			   	ret = -ERESTARTSYS;
 			   	break;
@@ -536,16 +494,27 @@ int mga_advance_primary(drm_device_t *dev)
 	   	remove_wait_queue(&dev_priv->wait_queue, &entry);
 	   	if(ret) return ret;
 	}
-   	atomic_set(&dev_priv->in_wait, 0);
+	clear_bit(MGA_IN_WAIT, &dev_priv->dispatch_status);
+
    	/* This primary buffer is now free to use */
    	prim_buffer->current_dma_ptr = prim_buffer->head;
    	prim_buffer->num_dwords = 0;
    	prim_buffer->sec_used = 0;
-   	atomic_set(&prim_buffer->needs_overflow, 0);
+	prim_buffer->prim_age = dev_priv->next_prim_age++;
+	if(prim_buffer->prim_age == 0 || prim_buffer->prim_age == 0xffffffff) {
+	   mga_flush_queue(dev);
+	   mga_dma_quiescent(dev);
+	   mga_reset_freelist(dev);
+	   prim_buffer->prim_age = (dev_priv->next_prim_age += 2);
+	}
+
+	/* Reset all buffer status stuff */
+	clear_bit(MGA_BUF_NEEDS_OVERFLOW, &prim_buffer->buffer_status);
+	clear_bit(MGA_BUF_FORCE_FIRE, &prim_buffer->buffer_status);
+	clear_bit(MGA_BUF_SWAP_PENDING, &prim_buffer->buffer_status);
+
    	dev_priv->current_prim = prim_buffer;
    	dev_priv->current_prim_idx = next_prim_idx;
-   	DRM_DEBUG("Primarys at advance\n");
-   	mga_print_all_primary(dev);
    	return 0;
 }
 
@@ -554,21 +523,29 @@ static inline int mga_decide_to_fire(drm_device_t *dev)
 {
    	drm_mga_private_t *dev_priv = (drm_mga_private_t *)dev->dev_private;
       	drm_device_dma_t  *dma	    = dev->dma;
-	
-   	if(atomic_read(&dev_priv->next_prim->force_fire))
-	{
+
+   	DRM_DEBUG("%s\n", __FUNCTION__);
+
+   	if(test_bit(MGA_BUF_FORCE_FIRE, &dev_priv->next_prim->buffer_status)) {
 	   	atomic_inc(&dma->total_prio);
 	   	return 1;
 	}
 
-	if (atomic_read(&dev_priv->in_flush) && dev_priv->next_prim->num_dwords)
-	{
+	if (test_bit(MGA_IN_GETBUF, &dev_priv->dispatch_status) &&
+	    dev_priv->next_prim->num_dwords) {
+	   	atomic_inc(&dma->total_prio);
+	   	return 1;
+	}
+
+	if (test_bit(MGA_IN_FLUSH, &dev_priv->dispatch_status) &&
+	    dev_priv->next_prim->num_dwords) {
 	   	atomic_inc(&dma->total_prio);
 	   	return 1;
 	}
    
    	if(atomic_read(&dev_priv->pending_bufs) <= MGA_NUM_PRIM_BUFS - 1) {
-		if(test_bit(0, &dev_priv->next_prim->swap_pending)) {
+		if(test_bit(MGA_BUF_SWAP_PENDING, 
+			    &dev_priv->next_prim->buffer_status)) {
 			atomic_inc(&dma->total_dmas);
 			return 1;
 		}
@@ -602,10 +579,11 @@ int mga_dma_schedule(drm_device_t *dev, int locked)
 		return -EBUSY;
 	}
    
-       	DRM_DEBUG("mga_dma_schedule\n");
+	DRM_DEBUG("%s\n", __FUNCTION__);
 
-   	if(atomic_read(&dev_priv->in_flush) || 
-	   atomic_read(&dev_priv->in_wait)) {
+   	if(test_bit(MGA_IN_FLUSH, &dev_priv->dispatch_status) || 
+	   test_bit(MGA_IN_WAIT, &dev_priv->dispatch_status) ||
+	   test_bit(MGA_IN_GETBUF, &dev_priv->dispatch_status)) {
 		locked = 1;
 	}
    
@@ -613,27 +591,25 @@ int mga_dma_schedule(drm_device_t *dev, int locked)
 	    !drm_lock_take(&dev->lock.hw_lock->lock, DRM_KERNEL_CONTEXT)) {
 	   	atomic_inc(&dma->total_missed_lock);
 	   	clear_bit(0, &dev->dma_flag);
+		DRM_DEBUG("Not locked\n");
 	   	return -EBUSY;
 	}
    	DRM_DEBUG("I'm locked\n");
 
-   
-   	if(!test_and_set_bit(0, &dev_priv->dispatch_lock)) {
+   	if(!test_and_set_bit(MGA_IN_DISPATCH, &dev_priv->dispatch_status)) {
 	   	/* Fire dma buffer */
 	   	if(mga_decide_to_fire(dev)) {
-		   	DRM_DEBUG("mga_fire_primary\n");
 		   	DRM_DEBUG("idx :%d\n", dev_priv->next_prim->idx);
-		   	atomic_set(&dev_priv->next_prim->force_fire, 0);
-		   	if(dev_priv->current_prim == dev_priv->next_prim &&
-			   dev_priv->next_prim->num_dwords != 0) {
+			clear_bit(MGA_BUF_FORCE_FIRE, 
+				  &dev_priv->next_prim->buffer_status);
+		   	if(dev_priv->current_prim == dev_priv->next_prim) {
 				/* Schedule overflow for a later time */
-				atomic_set(
-					&dev_priv->current_prim->needs_overflow,
-					1);
+				set_bit(MGA_BUF_NEEDS_OVERFLOW,
+					&dev_priv->next_prim->buffer_status);
 			}
 		   	mga_fire_primary(dev, dev_priv->next_prim);
 		} else {
-			clear_bit(0, &dev_priv->dispatch_lock);
+			clear_bit(MGA_IN_DISPATCH, &dev_priv->dispatch_status);
 		}
 	} else {
 		DRM_DEBUG("I can't get the dispatch lock\n");
@@ -646,17 +622,26 @@ int mga_dma_schedule(drm_device_t *dev, int locked)
 		}
 	}
 
-   	clear_bit(0, &dev->dma_flag);
-   
-      	if(atomic_read(&dev_priv->in_flush) == 1 &&
-	   dev_priv->next_prim->num_dwords == 0) {
-	   	/* Everything is on the hardware */
-	   	DRM_DEBUG("Primarys at Flush\n");
-	   	mga_print_all_primary(dev);
-	   	atomic_set(&dev_priv->in_flush, 0);
+      	if(test_bit(MGA_IN_FLUSH, &dev_priv->dispatch_status) &&
+	   dev_priv->next_prim->num_dwords == 0 &&
+	   atomic_read(&dev_priv->pending_bufs) == 0) {
+	   	/* Everything has been processed by the hardware */
+		clear_bit(MGA_IN_FLUSH, &dev_priv->dispatch_status);
 	   	wake_up_interruptible(&dev_priv->flush_queue);
 	}
 
+	if(test_bit(MGA_IN_GETBUF, &dev_priv->dispatch_status) &&
+	   dev_priv->tail->age < dev_priv->last_prim_age) {
+		clear_bit(MGA_IN_GETBUF, &dev_priv->dispatch_status);
+		DRM_DEBUG("Waking up buf queue\n");
+		wake_up_interruptible(&dev_priv->buf_queue);
+	} else if (test_bit(MGA_IN_GETBUF, &dev_priv->dispatch_status)) {
+	   	DRM_DEBUG("Not waking buf_queue on %d %d\n", 
+			  atomic_read(&dev->total_irq), 
+			  dev_priv->last_prim_age);
+	}
+
+   	clear_bit(0, &dev->dma_flag);
 	return 0;
 }
 
@@ -665,33 +650,35 @@ static void mga_dma_service(int irq, void *device, struct pt_regs *regs)
     	drm_device_t	 *dev = (drm_device_t *)device;
     	drm_mga_private_t *dev_priv = (drm_mga_private_t *)dev->dev_private;
     	drm_mga_prim_buf_t *last_prim_buffer;
-    	__volatile__ unsigned int *status = 
-      		(__volatile__ unsigned int *)dev_priv->status_page;
-    
+
+	DRM_DEBUG("%s\n", __FUNCTION__);
     	atomic_inc(&dev->total_irq);
+	if((MGA_READ(MGAREG_STATUS) & 0x00000001) != 0x00000001) return;
       	MGA_WRITE(MGAREG_ICLEAR, 0x00000001);
    	last_prim_buffer = dev_priv->last_prim;
     	last_prim_buffer->num_dwords = 0;
     	last_prim_buffer->sec_used = 0;
-      	clear_bit(0, &last_prim_buffer->in_use);
+	dev_priv->sarea_priv->last_dispatch = 
+		dev_priv->last_prim_age = last_prim_buffer->prim_age;
+      	clear_bit(MGA_BUF_IN_USE, &last_prim_buffer->buffer_status);
    	wake_up_interruptible(&dev_priv->wait_queue);
-      	clear_bit(0, &last_prim_buffer->swap_pending);
-      	clear_bit(0, &dev_priv->dispatch_lock);
+      	clear_bit(MGA_BUF_SWAP_PENDING, &last_prim_buffer->buffer_status);
+      	clear_bit(MGA_IN_DISPATCH, &dev_priv->dispatch_status);
       	atomic_dec(&dev_priv->pending_bufs);
-   	dev_priv->sarea_priv->last_dispatch = status[1];
    	queue_task(&dev->tq, &tq_immediate);
    	mark_bh(IMMEDIATE_BH);
 }
 
 static void mga_dma_task_queue(void *device)
 {
-   	drm_device_t *dev = (drm_device_t *) device;
-
-	mga_dma_schedule(dev, 0);
+	DRM_DEBUG("%s\n", __FUNCTION__);
+	mga_dma_schedule((drm_device_t *)device, 0);
 }
 
 int mga_dma_cleanup(drm_device_t *dev)
 {
+	DRM_DEBUG("%s\n", __FUNCTION__);
+
 	if(dev->dev_private) {
 		drm_mga_private_t *dev_priv = 
 			(drm_mga_private_t *) dev->dev_private;
@@ -740,14 +727,13 @@ static int mga_dma_initialize(drm_device_t *dev, drm_mga_init_t *init) {
 	drm_map_t *sarea_map = NULL;
 	int i;
 
+	DRM_DEBUG("%s\n", __FUNCTION__);
+
 	dev_priv = drm_alloc(sizeof(drm_mga_private_t), DRM_MEM_DRIVER);
 	if(dev_priv == NULL) return -ENOMEM;
 	dev->dev_private = (void *) dev_priv;
 
-	DRM_DEBUG("dev_private\n");
-
 	memset(dev_priv, 0, sizeof(drm_mga_private_t));
-      	atomic_set(&dev_priv->in_flush, 0);
 
 	if((init->reserved_map_idx >= dev->map_count) ||
 	   (init->buffer_map_idx >= dev->map_count)) {
@@ -762,7 +748,6 @@ static int mga_dma_initialize(drm_device_t *dev, drm_mga_init_t *init) {
 	dev_priv->sarea_priv = (drm_mga_sarea_t *) 
 		((u8 *)sarea_map->handle + 
 		 init->sarea_priv_offset);
-	DRM_DEBUG("sarea_priv\n");
 
 	/* Scale primary size to the next page */
 	dev_priv->chipset = init->chipset;
@@ -777,6 +762,7 @@ static int mga_dma_initialize(drm_device_t *dev, drm_mga_init_t *init) {
 
 	dev_priv->mAccess = init->mAccess;
    	init_waitqueue_head(&dev_priv->flush_queue);
+	init_waitqueue_head(&dev_priv->buf_queue);
 	dev_priv->WarpPipe = -1;
 
    	DRM_DEBUG("chipset: %d ucode_size: %d backOffset: %x depthOffset: %x\n",
@@ -796,20 +782,17 @@ static int mga_dma_initialize(drm_device_t *dev, drm_mga_init_t *init) {
 			  dev_priv->WarpIndex[i].phys_addr,
 			  dev_priv->WarpIndex[i].size);
 
-   	DRM_DEBUG("Doing init prim buffers\n");
    	if(mga_init_primary_bufs(dev, init) != 0) {
 		DRM_ERROR("Can not initialize primary buffers\n");
 		mga_dma_cleanup(dev);
 		return -ENOMEM;
 	}
-   	DRM_DEBUG("Done with init prim buffers\n");
    	dev_priv->real_status_page = mga_alloc_page(dev);
       	if(dev_priv->real_status_page == 0UL) {
 		mga_dma_cleanup(dev);
 		DRM_ERROR("Can not allocate status page\n");
 		return -ENOMEM;
 	}
-   	DRM_DEBUG("Status page at %lx\n", dev_priv->real_status_page);
 
    	dev_priv->status_page = 
 		ioremap_nocache(virt_to_bus((void *)dev_priv->real_status_page),
@@ -821,38 +804,23 @@ static int mga_dma_initialize(drm_device_t *dev, drm_mga_init_t *init) {
 		return -ENOMEM;
 	}
 
-   	DRM_DEBUG("Status page remapped to %p\n", dev_priv->status_page);
    	/* Write status page when secend or softrap occurs */
    	MGA_WRITE(MGAREG_PRIMPTR, 
 		  virt_to_bus((void *)dev_priv->real_status_page) | 0x00000003);
-   
-   	dev_priv->device = pci_find_device(0x102b, 0x0525, NULL);
-   	if(dev_priv->device == NULL) {
-		DRM_ERROR("Could not find pci device for card\n");
-		mga_dma_cleanup(dev);
-		return -EINVAL;
-	}
-   
-   	DRM_DEBUG("dma initialization\n");
+      
 
 	/* Private is now filled in, initialize the hardware */
 	{
-	   	__volatile__ unsigned int *status = 
-			(unsigned int *)dev_priv->status_page;
 		PRIMLOCALS;
 		PRIMGETPTR( dev_priv );
-	   
-	   	dev_priv->last_sync_tag = mga_create_sync_tag(dev);
-	   
+	   	   
 		PRIMOUTREG(MGAREG_DMAPAD, 0);
 		PRIMOUTREG(MGAREG_DMAPAD, 0);
-		PRIMOUTREG(MGAREG_DWGSYNC, dev_priv->last_sync_tag);
+		PRIMOUTREG(MGAREG_DWGSYNC, 0x0100);
 		PRIMOUTREG(MGAREG_SOFTRAP, 0);
 		/* Poll for the first buffer to insure that
 		 * the status register will be correct
 		 */
-	   	DRM_DEBUG("phys_head : %lx\n", (unsigned long)phys_head);
-   		status[1] = 0;
 	   
 		mga_flush_write_combine();
 	   	MGA_WRITE(MGAREG_PRIMADDRESS, phys_head | TT_GENERAL);
@@ -860,9 +828,7 @@ static int mga_dma_initialize(drm_device_t *dev, drm_mga_init_t *init) {
 		MGA_WRITE(MGAREG_PRIMEND, ((phys_head + num_dwords * 4) | 
 					   PDEA_pagpxfer_enable));
 	   
-	   	while(MGA_READ(MGAREG_DWGSYNC) != dev_priv->last_sync_tag) ;
-	   	DRM_DEBUG("status[0] after initialization : %x\n", status[0]);
-	   	DRM_DEBUG("status[1] after initialization : %x\n", status[1]);
+	   	while(MGA_READ(MGAREG_DWGSYNC) != 0x0100) ;
 	}
 
 	if(mga_freelist_init(dev) != 0) {
@@ -870,7 +836,6 @@ static int mga_dma_initialize(drm_device_t *dev, drm_mga_init_t *init) {
 	   	mga_dma_cleanup(dev);
 	   	return -ENOMEM;
 	}
-   	DRM_DEBUG("dma init was successful\n");
 	return 0;
 }
 
@@ -881,6 +846,8 @@ int mga_dma_init(struct inode *inode, struct file *filp,
 	drm_device_t *dev = priv->dev;
 	drm_mga_init_t init;
    
+   	DRM_DEBUG("%s\n", __FUNCTION__);
+
 	copy_from_user_ret(&init, (drm_mga_init_t *)arg, sizeof(init), -EFAULT);
    
 	switch(init.func) {
@@ -925,7 +892,7 @@ int mga_irq_install(drm_device_t *dev, int irq)
    				/* Install handler */
 	if ((retcode = request_irq(dev->irq,
 				   mga_dma_service,
-				   0,
+				   SA_SHIRQ,
 				   dev->devname,
 				   dev))) {
 		down(&dev->struct_sem);
@@ -964,7 +931,9 @@ int mga_control(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_control_t	ctl;
    
 	copy_from_user_ret(&ctl, (drm_control_t *)arg, sizeof(ctl), -EFAULT);
-	
+
+   	DRM_DEBUG("%s\n", __FUNCTION__);
+
 	switch (ctl.func) {
 	case DRM_INST_HANDLER:
 		return mga_irq_install(dev, ctl.irq);
@@ -981,30 +950,33 @@ static int mga_flush_queue(drm_device_t *dev)
   	drm_mga_private_t *dev_priv = (drm_mga_private_t *)dev->dev_private;
    	int ret = 0;
 
+   	DRM_DEBUG("%s\n", __FUNCTION__);
+
    	if(dev_priv == NULL) {
 	   	return 0;
 	}
    
    	if(dev_priv->next_prim->num_dwords != 0) {
-	   	atomic_set(&dev_priv->in_flush, 1);
+		set_bit(MGA_IN_FLUSH, &dev_priv->dispatch_status);
    		current->state = TASK_INTERRUPTIBLE;
    		add_wait_queue(&dev_priv->flush_queue, &entry);
    		for (;;) {
 		   	mga_dma_schedule(dev, 0);
-	   		if (atomic_read(&dev_priv->in_flush) == 0) 
+	   		if (!test_bit(MGA_IN_FLUSH, 
+				      &dev_priv->dispatch_status)) 
 				break;
 		   	atomic_inc(&dev->total_sleeps);
-		   	DRM_DEBUG("Schedule in flush_queue\n");
-	      		schedule_timeout(HZ*3);
+	      		schedule();
 	      		if (signal_pending(current)) {
 		   		ret = -EINTR; /* Can't restart */
+				clear_bit(MGA_IN_FLUSH, 
+					  &dev_priv->dispatch_status);
 		   		break;
 			}
 		}
    		current->state = TASK_RUNNING;
    		remove_wait_queue(&dev_priv->flush_queue, &entry);
 	}
-   	atomic_set(&dev_priv->in_flush, 0);
    	return ret;
 }
 
@@ -1018,6 +990,7 @@ void mga_reclaim_buffers(drm_device_t *dev, pid_t pid)
       	if(dev->dev_private == NULL) return;
 	if(dma->buflist == NULL) return;
 
+	DRM_DEBUG("%s\n", __FUNCTION__);
         mga_flush_queue(dev);
 
 	for (i = 0; i < dma->buf_count; i++) {
@@ -1043,6 +1016,7 @@ int mga_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 	int		  ret	= 0;
 	drm_lock_t	  lock;
 
+	DRM_DEBUG("%s\n", __FUNCTION__);
 	copy_from_user_ret(&lock, (drm_lock_t *)arg, sizeof(lock), -EFAULT);
 
 	if (lock.context == DRM_KERNEL_CONTEXT) {
@@ -1081,7 +1055,6 @@ int mga_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 				/* Contention */
 			atomic_inc(&dev->total_sleeps);
 			current->state = TASK_INTERRUPTIBLE;
-		   	DRM_DEBUG("Calling lock schedule\n");
 			schedule();
 			if (signal_pending(current)) {
 				ret = -ERESTARTSYS;
@@ -1111,11 +1084,8 @@ int mga_flush_ioctl(struct inode *inode, struct file *filp,
     	drm_device_t	  *dev	  = priv->dev;
 	drm_lock_t	  lock;
       	drm_mga_private_t *dev_priv = (drm_mga_private_t *)dev->dev_private;
-   	drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
-      	__volatile__ unsigned int *status = 
-     		(__volatile__ unsigned int *)dev_priv->status_page;
-	int		 i;
- 
+
+   	DRM_DEBUG("%s\n", __FUNCTION__);
 	copy_from_user_ret(&lock, (drm_lock_t *)arg, sizeof(lock), -EFAULT);
 
 	if(!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
@@ -1124,28 +1094,17 @@ int mga_flush_ioctl(struct inode *inode, struct file *filp,
 	}
 
    	if(lock.flags & _DRM_LOCK_FLUSH || lock.flags & _DRM_LOCK_FLUSH_ALL) {
-		mga_flush_queue(dev);
-
-		if((MGA_READ(MGAREG_STATUS) & 0x00030001) == 0x00020000 &&
-		   status[1] != dev_priv->last_sync_tag) 
-		{
-			DRM_DEBUG("Reseting hardware status\n");
-			MGA_WRITE(MGAREG_DWGSYNC, dev_priv->last_sync_tag);
-
-			while(MGA_READ(MGAREG_DWGSYNC) != 
-			      dev_priv->last_sync_tag) 
-			{
-				for(i = 0; i < 4096; i++) mga_delay();
-			}
-
-			status[1] = 
-				sarea_priv->last_dispatch = 
-				dev_priv->last_sync_tag;
-		} else {
-			sarea_priv->last_dispatch = status[1];
-		}
+		drm_mga_prim_buf_t *temp_buf =
+			dev_priv->prim_bufs[dev_priv->current_prim_idx];
+
+		if(temp_buf && temp_buf->num_dwords) {
+			set_bit(MGA_BUF_FORCE_FIRE, &temp_buf->buffer_status);
+			mga_advance_primary(dev);
+			mga_dma_schedule(dev, 1);
+ 		}
 	}
    	if(lock.flags & _DRM_LOCK_QUIESCENT) {
+		mga_flush_queue(dev);
 		mga_dma_quiescent(dev);
 	}