i810_dma.c

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	if (buf_priv->currently_mapped == I810_BUF_MAPPED) {
		*(u32 *)buf_priv->virtual = (GFX_OP_PRIMITIVE |
					     sarea_priv->vertex_prim |
					     ((used/4)-2));

		if (used & 4) {
			*(u32 *)((u32)buf_priv->virtual + used) = 0;
			used += 4;
		}

		i810_unmap_buffer(buf);
	}

	if (used) {
		do {
			if (i < nbox) {
				BEGIN_LP_RING(4);
				OUT_RING( GFX_OP_SCISSOR | SC_UPDATE_SCISSOR |
					  SC_ENABLE );
				OUT_RING( GFX_OP_SCISSOR_INFO );
				OUT_RING( box[i].x1 | (box[i].y1<<16) );
				OUT_RING( (box[i].x2-1) | ((box[i].y2-1)<<16) );
				ADVANCE_LP_RING();
			}

			BEGIN_LP_RING(4);
			OUT_RING( CMD_OP_BATCH_BUFFER );
			OUT_RING( start | BB1_PROTECTED );
			OUT_RING( start + used - 4 );
			OUT_RING( 0 );
			ADVANCE_LP_RING();

		} while (++i < nbox);
	}

	BEGIN_LP_RING(10);
	OUT_RING( CMD_STORE_DWORD_IDX );
	OUT_RING( 20 );
	OUT_RING( dev_priv->counter );
	OUT_RING( 0 );

	if (discard) {
		OUT_RING( CMD_STORE_DWORD_IDX );
		OUT_RING( buf_priv->my_use_idx );
		OUT_RING( I810_BUF_FREE );
		OUT_RING( 0 );
	}

      	OUT_RING( CMD_REPORT_HEAD );
	OUT_RING( 0 );
   	ADVANCE_LP_RING();
}


/* Interrupts are only for flushing */
void i810_dma_service(int irq, void *device, struct pt_regs *regs)
{
	drm_device_t	 *dev = (drm_device_t *)device;
      	drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
   	u16 temp;

	atomic_inc(&dev->counts[_DRM_STAT_IRQ]);
      	temp = I810_READ16(I810REG_INT_IDENTITY_R);
   	temp = temp & ~(0x6000);
   	if(temp != 0) I810_WRITE16(I810REG_INT_IDENTITY_R,
				   temp); /* Clear all interrupts */
	else
	   return;

   	queue_task(&dev->tq, &tq_immediate);
   	mark_bh(IMMEDIATE_BH);
}

void i810_dma_immediate_bh(void *device)
{
	drm_device_t *dev = (drm_device_t *) device;
      	drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;

   	atomic_set(&dev_priv->flush_done, 1);
   	wake_up_interruptible(&dev_priv->flush_queue);
}

static inline void i810_dma_emit_flush(drm_device_t *dev)
{
   	drm_i810_private_t *dev_priv = dev->dev_private;
   	RING_LOCALS;

   	i810_kernel_lost_context(dev);

   	BEGIN_LP_RING(2);
      	OUT_RING( CMD_REPORT_HEAD );
      	OUT_RING( GFX_OP_USER_INTERRUPT );
      	ADVANCE_LP_RING();

/*  	i810_wait_ring( dev, dev_priv->ring.Size - 8 ); */
/*     	atomic_set(&dev_priv->flush_done, 1); */
/*     	wake_up_interruptible(&dev_priv->flush_queue); */
}

static inline void i810_dma_quiescent_emit(drm_device_t *dev)
{
      	drm_i810_private_t *dev_priv = dev->dev_private;
   	RING_LOCALS;

  	i810_kernel_lost_context(dev);

   	BEGIN_LP_RING(4);
   	OUT_RING( INST_PARSER_CLIENT | INST_OP_FLUSH | INST_FLUSH_MAP_CACHE );
   	OUT_RING( CMD_REPORT_HEAD );
      	OUT_RING( 0 );
      	OUT_RING( GFX_OP_USER_INTERRUPT );
   	ADVANCE_LP_RING();

/*  	i810_wait_ring( dev, dev_priv->ring.Size - 8 ); */
/*     	atomic_set(&dev_priv->flush_done, 1); */
/*     	wake_up_interruptible(&dev_priv->flush_queue); */
}

void i810_dma_quiescent(drm_device_t *dev)
{
      	DECLARE_WAITQUEUE(entry, current);
  	drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
	unsigned long end;

   	if(dev_priv == NULL) {
	   	return;
	}
      	atomic_set(&dev_priv->flush_done, 0);
   	add_wait_queue(&dev_priv->flush_queue, &entry);
   	end = jiffies + (HZ*3);

   	for (;;) {
		current->state = TASK_INTERRUPTIBLE;
	      	i810_dma_quiescent_emit(dev);
	   	if (atomic_read(&dev_priv->flush_done) == 1) break;
		if((signed)(end - jiffies) <= 0) {
		   	DRM_ERROR("lockup\n");
		   	break;
		}
	      	schedule_timeout(HZ*3);
	      	if (signal_pending(current)) {
		   	break;
		}
	}

   	current->state = TASK_RUNNING;
   	remove_wait_queue(&dev_priv->flush_queue, &entry);

   	return;
}

static int i810_flush_queue(drm_device_t *dev)
{
   	DECLARE_WAITQUEUE(entry, current);
  	drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
	drm_device_dma_t *dma = dev->dma;
	unsigned long end;
   	int i, ret = 0;

   	if(dev_priv == NULL) {
	   	return 0;
	}
      	atomic_set(&dev_priv->flush_done, 0);
   	add_wait_queue(&dev_priv->flush_queue, &entry);
   	end = jiffies + (HZ*3);
   	for (;;) {
		current->state = TASK_INTERRUPTIBLE;
	      	i810_dma_emit_flush(dev);
	   	if (atomic_read(&dev_priv->flush_done) == 1) break;
		if((signed)(end - jiffies) <= 0) {
		   	DRM_ERROR("lockup\n");
		   	break;
		}
	      	schedule_timeout(HZ*3);
	      	if (signal_pending(current)) {
		   	ret = -EINTR; /* Can't restart */
		   	break;
		}
	}

   	current->state = TASK_RUNNING;
   	remove_wait_queue(&dev_priv->flush_queue, &entry);


   	for (i = 0; i < dma->buf_count; i++) {
	   	drm_buf_t *buf = dma->buflist[ i ];
	   	drm_i810_buf_priv_t *buf_priv = buf->dev_private;

		int used = cmpxchg(buf_priv->in_use, I810_BUF_HARDWARE,
				   I810_BUF_FREE);

		if (used == I810_BUF_HARDWARE)
			DRM_DEBUG("reclaimed from HARDWARE\n");
		if (used == I810_BUF_CLIENT)
			DRM_DEBUG("still on client HARDWARE\n");
	}

   	return ret;
}

/* Must be called with the lock held */
void i810_reclaim_buffers(drm_device_t *dev, pid_t pid)
{
	drm_device_dma_t *dma = dev->dma;
	int		 i;

	if (!dma) return;
      	if (!dev->dev_private) return;
	if (!dma->buflist) return;

        i810_flush_queue(dev);

	for (i = 0; i < dma->buf_count; i++) {
	   	drm_buf_t *buf = dma->buflist[ i ];
	   	drm_i810_buf_priv_t *buf_priv = buf->dev_private;

		if (buf->pid == pid && buf_priv) {
			int used = cmpxchg(buf_priv->in_use, I810_BUF_CLIENT,
					   I810_BUF_FREE);

			if (used == I810_BUF_CLIENT)
				DRM_DEBUG("reclaimed from client\n");
		   	if(buf_priv->currently_mapped == I810_BUF_MAPPED)
		     		buf_priv->currently_mapped = I810_BUF_UNMAPPED;
		}
	}
}

int i810_flush_ioctl(struct inode *inode, struct file *filp,
		     unsigned int cmd, unsigned long arg)
{
   	drm_file_t	  *priv	  = filp->private_data;
   	drm_device_t	  *dev	  = priv->dev;

   	DRM_DEBUG("i810_flush_ioctl\n");
   	if(!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
		DRM_ERROR("i810_flush_ioctl called without lock held\n");
		return -EINVAL;
	}

   	i810_flush_queue(dev);
   	return 0;
}


int i810_dma_vertex(struct inode *inode, struct file *filp,
	       unsigned int cmd, unsigned long arg)
{
	drm_file_t *priv = filp->private_data;
	drm_device_t *dev = priv->dev;
	drm_device_dma_t *dma = dev->dma;
   	drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
      	u32 *hw_status = (u32 *)dev_priv->hw_status_page;
   	drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
     					dev_priv->sarea_priv;
	drm_i810_vertex_t vertex;

	if (copy_from_user(&vertex, (drm_i810_vertex_t *)arg, sizeof(vertex)))
		return -EFAULT;

   	if(!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
		DRM_ERROR("i810_dma_vertex called without lock held\n");
		return -EINVAL;
	}

	DRM_DEBUG("i810 dma vertex, idx %d used %d discard %d\n",
		  vertex.idx, vertex.used, vertex.discard);

	if(vertex.idx < 0 || vertex.idx > dma->buf_count) return -EINVAL;

	i810_dma_dispatch_vertex( dev,
				  dma->buflist[ vertex.idx ],
				  vertex.discard, vertex.used );

   	atomic_add(vertex.used, &dev->counts[_DRM_STAT_SECONDARY]);
	atomic_inc(&dev->counts[_DRM_STAT_DMA]);
	sarea_priv->last_enqueue = dev_priv->counter-1;
   	sarea_priv->last_dispatch = (int) hw_status[5];

	return 0;
}



int i810_clear_bufs(struct inode *inode, struct file *filp,
		   unsigned int cmd, unsigned long arg)
{
	drm_file_t *priv = filp->private_data;
	drm_device_t *dev = priv->dev;
	drm_i810_clear_t clear;

   	if (copy_from_user(&clear, (drm_i810_clear_t *)arg, sizeof(clear)))
		return -EFAULT;

   	if(!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
		DRM_ERROR("i810_clear_bufs called without lock held\n");
		return -EINVAL;
	}

 	/* GH: Someone's doing nasty things... */
 	if (!dev->dev_private) {
 		return -EINVAL;
 	}

	i810_dma_dispatch_clear( dev, clear.flags,
				 clear.clear_color,
				 clear.clear_depth );
   	return 0;
}

int i810_swap_bufs(struct inode *inode, struct file *filp,
		  unsigned int cmd, unsigned long arg)
{
	drm_file_t *priv = filp->private_data;
	drm_device_t *dev = priv->dev;

	DRM_DEBUG("i810_swap_bufs\n");

   	if(!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
		DRM_ERROR("i810_swap_buf called without lock held\n");
		return -EINVAL;
	}

	i810_dma_dispatch_swap( dev );
   	return 0;
}

int i810_getage(struct inode *inode, struct file *filp, unsigned int cmd,
		unsigned long arg)
{
   	drm_file_t	  *priv	    = filp->private_data;
	drm_device_t	  *dev	    = priv->dev;
   	drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
      	u32 *hw_status = (u32 *)dev_priv->hw_status_page;
   	drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
     					dev_priv->sarea_priv;

      	sarea_priv->last_dispatch = (int) hw_status[5];
	return 0;
}

int i810_getbuf(struct inode *inode, struct file *filp, unsigned int cmd,
		unsigned long arg)
{
	drm_file_t	  *priv	    = filp->private_data;
	drm_device_t	  *dev	    = priv->dev;
	int		  retcode   = 0;
	drm_i810_dma_t	  d;
   	drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
   	u32 *hw_status = (u32 *)dev_priv->hw_status_page;
   	drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
     					dev_priv->sarea_priv;

	DRM_DEBUG("getbuf\n");
   	if (copy_from_user(&d, (drm_i810_dma_t *)arg, sizeof(d)))
		return -EFAULT;

	if(!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
		DRM_ERROR("i810_dma called without lock held\n");
		return -EINVAL;
	}

	d.granted = 0;

	retcode = i810_dma_get_buffer(dev, &d, filp);

	DRM_DEBUG("i810_dma: %d returning %d, granted = %d\n",
		  current->pid, retcode, d.granted);

	if (copy_to_user((drm_dma_t *)arg, &d, sizeof(d)))
		return -EFAULT;
   	sarea_priv->last_dispatch = (int) hw_status[5];

	return retcode;
}

int i810_copybuf(struct inode *inode, struct file *filp, unsigned int cmd,
		unsigned long arg)
{
	drm_file_t	  *priv	    = filp->private_data;
	drm_device_t	  *dev	    = priv->dev;
	drm_i810_copy_t	  d;
   	drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
   	u32 *hw_status = (u32 *)dev_priv->hw_status_page;
   	drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
     					dev_priv->sarea_priv;
	drm_buf_t *buf;
	drm_i810_buf_priv_t *buf_priv;
	drm_device_dma_t *dma = dev->dma;

	if(!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
		DRM_ERROR("i810_dma called without lock held\n");
		return -EINVAL;
	}

   	if (copy_from_user(&d, (drm_i810_copy_t *)arg, sizeof(d)))
		return -EFAULT;

        if(d.idx < 0 || d.idx > dma->buf_count) return -EINVAL;
	buf = dma->buflist[ d.idx ];
   	buf_priv = buf->dev_private;
	if (buf_priv->currently_mapped != I810_BUF_MAPPED) return -EPERM;

	if(d.used < 0 || d.used > buf->total) return -EINVAL;

   	if (copy_from_user(buf_priv->virtual, d.address, d.used))
		return -EFAULT;

   	sarea_priv->last_dispatch = (int) hw_status[5];

	return 0;
}

int i810_docopy(struct inode *inode, struct file *filp, unsigned int cmd,
		unsigned long arg)
{
	if(VM_DONTCOPY == 0) return 1;
	return 0;
}