r128_cce.c

h内核

		r128_do_cleanup_cce( dev );
		return DRM_ERR(EINVAL);
	}
	dev_priv->cce_ring = drm_core_findmap(dev, init->ring_offset);
	if(!dev_priv->cce_ring) {
		DRM_ERROR("could not find cce ring region!\n");
		dev->dev_private = (void *)dev_priv;
		r128_do_cleanup_cce( dev );
		return DRM_ERR(EINVAL);
	}
	dev_priv->ring_rptr = drm_core_findmap(dev, init->ring_rptr_offset);
	if(!dev_priv->ring_rptr) {
		DRM_ERROR("could not find ring read pointer!\n");
		dev->dev_private = (void *)dev_priv;
		r128_do_cleanup_cce( dev );
		return DRM_ERR(EINVAL);
	}
	dev->agp_buffer_map = drm_core_findmap(dev, init->buffers_offset);
	if(!dev->agp_buffer_map) {
		DRM_ERROR("could not find dma buffer region!\n");
		dev->dev_private = (void *)dev_priv;
		r128_do_cleanup_cce( dev );
		return DRM_ERR(EINVAL);
	}

	if ( !dev_priv->is_pci ) {
		dev_priv->agp_textures = drm_core_findmap(dev, init->agp_textures_offset);
		if(!dev_priv->agp_textures) {
			DRM_ERROR("could not find agp texture region!\n");
			dev->dev_private = (void *)dev_priv;
			r128_do_cleanup_cce( dev );
			return DRM_ERR(EINVAL);
		}
	}

	dev_priv->sarea_priv =
		(drm_r128_sarea_t *)((u8 *)dev_priv->sarea->handle +
				     init->sarea_priv_offset);

#if __OS_HAS_AGP
	if ( !dev_priv->is_pci ) {
		drm_core_ioremap( dev_priv->cce_ring, dev );
		drm_core_ioremap( dev_priv->ring_rptr, dev );
		drm_core_ioremap( dev->agp_buffer_map, dev );
		if(!dev_priv->cce_ring->handle ||
		   !dev_priv->ring_rptr->handle ||
		   !dev->agp_buffer_map->handle) {
			DRM_ERROR("Could not ioremap agp regions!\n");
			dev->dev_private = (void *)dev_priv;
			r128_do_cleanup_cce( dev );
			return DRM_ERR(ENOMEM);
		}
	} else
#endif
	{
		dev_priv->cce_ring->handle =
			(void *)dev_priv->cce_ring->offset;
		dev_priv->ring_rptr->handle =
			(void *)dev_priv->ring_rptr->offset;
		dev->agp_buffer_map->handle = (void *)dev->agp_buffer_map->offset;
	}

#if __OS_HAS_AGP
	if ( !dev_priv->is_pci )
		dev_priv->cce_buffers_offset = dev->agp->base;
	else
#endif
		dev_priv->cce_buffers_offset = dev->sg->handle;

	dev_priv->ring.start = (u32 *)dev_priv->cce_ring->handle;
	dev_priv->ring.end = ((u32 *)dev_priv->cce_ring->handle
			      + init->ring_size / sizeof(u32));
	dev_priv->ring.size = init->ring_size;
	dev_priv->ring.size_l2qw = drm_order( init->ring_size / 8 );

	dev_priv->ring.tail_mask =
		(dev_priv->ring.size / sizeof(u32)) - 1;

	dev_priv->ring.high_mark = 128;

	dev_priv->sarea_priv->last_frame = 0;
	R128_WRITE( R128_LAST_FRAME_REG, dev_priv->sarea_priv->last_frame );

	dev_priv->sarea_priv->last_dispatch = 0;
	R128_WRITE( R128_LAST_DISPATCH_REG,
		    dev_priv->sarea_priv->last_dispatch );

#if __OS_HAS_AGP
	if ( dev_priv->is_pci ) {
#endif
		if (!drm_ati_pcigart_init( dev, &dev_priv->phys_pci_gart,
     					    &dev_priv->bus_pci_gart) ) {
			DRM_ERROR( "failed to init PCI GART!\n" );
			dev->dev_private = (void *)dev_priv;
			r128_do_cleanup_cce( dev );
			return DRM_ERR(ENOMEM);
		}
		R128_WRITE( R128_PCI_GART_PAGE, dev_priv->bus_pci_gart );
#if __OS_HAS_AGP
	}
#endif

	r128_cce_init_ring_buffer( dev, dev_priv );
	r128_cce_load_microcode( dev_priv );

	dev->dev_private = (void *)dev_priv;

	r128_do_engine_reset( dev );

	return 0;
}

int r128_do_cleanup_cce( drm_device_t *dev )
{

	/* Make sure interrupts are disabled here because the uninstall ioctl
	 * may not have been called from userspace and after dev_private
	 * is freed, it's too late.
	 */
	if ( dev->irq_enabled ) drm_irq_uninstall(dev);

	if ( dev->dev_private ) {
		drm_r128_private_t *dev_priv = dev->dev_private;

#if __OS_HAS_AGP
		if ( !dev_priv->is_pci ) {
			if ( dev_priv->cce_ring != NULL )
				drm_core_ioremapfree( dev_priv->cce_ring, dev );
			if ( dev_priv->ring_rptr != NULL )
				drm_core_ioremapfree( dev_priv->ring_rptr, dev );
			if ( dev->agp_buffer_map != NULL )
				drm_core_ioremapfree( dev->agp_buffer_map, dev );
		} else
#endif
		{
			if (!drm_ati_pcigart_cleanup( dev,
						dev_priv->phys_pci_gart,
						dev_priv->bus_pci_gart ))
				DRM_ERROR( "failed to cleanup PCI GART!\n" );
		}

		drm_free( dev->dev_private, sizeof(drm_r128_private_t),
			   DRM_MEM_DRIVER );
		dev->dev_private = NULL;
	}

	return 0;
}

int r128_cce_init( DRM_IOCTL_ARGS )
{
	DRM_DEVICE;
	drm_r128_init_t init;

	DRM_DEBUG( "\n" );

	LOCK_TEST_WITH_RETURN( dev, filp );

	DRM_COPY_FROM_USER_IOCTL( init, (drm_r128_init_t __user *)data, sizeof(init) );

	switch ( init.func ) {
	case R128_INIT_CCE:
		return r128_do_init_cce( dev, &init );
	case R128_CLEANUP_CCE:
		return r128_do_cleanup_cce( dev );
	}

	return DRM_ERR(EINVAL);
}

int r128_cce_start( DRM_IOCTL_ARGS )
{
	DRM_DEVICE;
	drm_r128_private_t *dev_priv = dev->dev_private;
	DRM_DEBUG( "\n" );

	LOCK_TEST_WITH_RETURN( dev, filp );

	if ( dev_priv->cce_running || dev_priv->cce_mode == R128_PM4_NONPM4 ) {
		DRM_DEBUG( "%s while CCE running\n", __FUNCTION__ );
		return 0;
	}

	r128_do_cce_start( dev_priv );

	return 0;
}

/* Stop the CCE.  The engine must have been idled before calling this
 * routine.
 */
int r128_cce_stop( DRM_IOCTL_ARGS )
{
	DRM_DEVICE;
	drm_r128_private_t *dev_priv = dev->dev_private;
	drm_r128_cce_stop_t stop;
	int ret;
	DRM_DEBUG( "\n" );

	LOCK_TEST_WITH_RETURN( dev, filp );

	DRM_COPY_FROM_USER_IOCTL(stop, (drm_r128_cce_stop_t __user *)data, sizeof(stop) );

	/* Flush any pending CCE commands.  This ensures any outstanding
	 * commands are exectuted by the engine before we turn it off.
	 */
	if ( stop.flush ) {
		r128_do_cce_flush( dev_priv );
	}

	/* If we fail to make the engine go idle, we return an error
	 * code so that the DRM ioctl wrapper can try again.
	 */
	if ( stop.idle ) {
		ret = r128_do_cce_idle( dev_priv );
		if ( ret ) return ret;
	}

	/* Finally, we can turn off the CCE.  If the engine isn't idle,
	 * we will get some dropped triangles as they won't be fully
	 * rendered before the CCE is shut down.
	 */
	r128_do_cce_stop( dev_priv );

	/* Reset the engine */
	r128_do_engine_reset( dev );

	return 0;
}

/* Just reset the CCE ring.  Called as part of an X Server engine reset.
 */
int r128_cce_reset( DRM_IOCTL_ARGS )
{
	DRM_DEVICE;
	drm_r128_private_t *dev_priv = dev->dev_private;
	DRM_DEBUG( "\n" );

	LOCK_TEST_WITH_RETURN( dev, filp );

	if ( !dev_priv ) {
		DRM_DEBUG( "%s called before init done\n", __FUNCTION__ );
		return DRM_ERR(EINVAL);
	}

	r128_do_cce_reset( dev_priv );

	/* The CCE is no longer running after an engine reset */
	dev_priv->cce_running = 0;

	return 0;
}

int r128_cce_idle( DRM_IOCTL_ARGS )
{
	DRM_DEVICE;
	drm_r128_private_t *dev_priv = dev->dev_private;
	DRM_DEBUG( "\n" );

	LOCK_TEST_WITH_RETURN( dev, filp );

	if ( dev_priv->cce_running ) {
		r128_do_cce_flush( dev_priv );
	}

	return r128_do_cce_idle( dev_priv );
}

int r128_engine_reset( DRM_IOCTL_ARGS )
{
	DRM_DEVICE;
	DRM_DEBUG( "\n" );

	LOCK_TEST_WITH_RETURN( dev, filp );

	return r128_do_engine_reset( dev );
}

int r128_fullscreen( DRM_IOCTL_ARGS )
{
	return DRM_ERR(EINVAL);
}


/* ================================================================
 * Freelist management
 */
#define R128_BUFFER_USED	0xffffffff
#define R128_BUFFER_FREE	0

#if 0
static int r128_freelist_init( drm_device_t *dev )
{
	drm_device_dma_t *dma = dev->dma;
	drm_r128_private_t *dev_priv = dev->dev_private;
	drm_buf_t *buf;
	drm_r128_buf_priv_t *buf_priv;
	drm_r128_freelist_t *entry;
	int i;

	dev_priv->head = drm_alloc( sizeof(drm_r128_freelist_t),
				     DRM_MEM_DRIVER );
	if ( dev_priv->head == NULL )
		return DRM_ERR(ENOMEM);

	memset( dev_priv->head, 0, sizeof(drm_r128_freelist_t) );
	dev_priv->head->age = R128_BUFFER_USED;

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

		entry = drm_alloc( sizeof(drm_r128_freelist_t),
				    DRM_MEM_DRIVER );
		if ( !entry ) return DRM_ERR(ENOMEM);

		entry->age = R128_BUFFER_FREE;
		entry->buf = buf;
		entry->prev = dev_priv->head;
		entry->next = dev_priv->head->next;
		if ( !entry->next )
			dev_priv->tail = entry;

		buf_priv->discard = 0;
		buf_priv->dispatched = 0;
		buf_priv->list_entry = entry;

		dev_priv->head->next = entry;

		if ( dev_priv->head->next )
			dev_priv->head->next->prev = entry;
	}

	return 0;

}
#endif

drm_buf_t *r128_freelist_get( drm_device_t *dev )
{
	drm_device_dma_t *dma = dev->dma;
	drm_r128_private_t *dev_priv = dev->dev_private;
	drm_r128_buf_priv_t *buf_priv;
	drm_buf_t *buf;
	int i, t;

	/* FIXME: Optimize -- use freelist code */

	for ( i = 0 ; i < dma->buf_count ; i++ ) {
		buf = dma->buflist[i];
		buf_priv = buf->dev_private;
		if ( buf->filp == 0 )
			return buf;
	}

	for ( t = 0 ; t < dev_priv->usec_timeout ; t++ ) {
		u32 done_age = R128_READ( R128_LAST_DISPATCH_REG );

		for ( i = 0 ; i < dma->buf_count ; i++ ) {
			buf = dma->buflist[i];
			buf_priv = buf->dev_private;
			if ( buf->pending && buf_priv->age <= done_age ) {
				/* The buffer has been processed, so it
				 * can now be used.
				 */
				buf->pending = 0;
				return buf;
			}
		}
		DRM_UDELAY( 1 );
	}

	DRM_DEBUG( "returning NULL!\n" );
	return NULL;
}

void r128_freelist_reset( drm_device_t *dev )
{
	drm_device_dma_t *dma = dev->dma;
	int i;

	for ( i = 0 ; i < dma->buf_count ; i++ ) {
		drm_buf_t *buf = dma->buflist[i];
		drm_r128_buf_priv_t *buf_priv = buf->dev_private;
		buf_priv->age = 0;
	}
}


/* ================================================================
 * CCE command submission
 */

int r128_wait_ring( drm_r128_private_t *dev_priv, int n )
{
	drm_r128_ring_buffer_t *ring = &dev_priv->ring;
	int i;

	for ( i = 0 ; i < dev_priv->usec_timeout ; i++ ) {
		r128_update_ring_snapshot( dev_priv );
		if ( ring->space >= n )
			return 0;
		DRM_UDELAY( 1 );
	}

	/* FIXME: This is being ignored... */
	DRM_ERROR( "failed!\n" );
	return DRM_ERR(EBUSY);
}

static int r128_cce_get_buffers( DRMFILE filp, drm_device_t *dev, drm_dma_t *d )
{
	int i;
	drm_buf_t *buf;

	for ( i = d->granted_count ; i < d->request_count ; i++ ) {
		buf = r128_freelist_get( dev );
		if ( !buf ) return DRM_ERR(EAGAIN);

		buf->filp = filp;

		if ( DRM_COPY_TO_USER( &d->request_indices[i], &buf->idx,
				   sizeof(buf->idx) ) )
			return DRM_ERR(EFAULT);
		if ( DRM_COPY_TO_USER( &d->request_sizes[i], &buf->total,
				   sizeof(buf->total) ) )
			return DRM_ERR(EFAULT);

		d->granted_count++;
	}
	return 0;
}

int r128_cce_buffers( DRM_IOCTL_ARGS )
{
	DRM_DEVICE;
	drm_device_dma_t *dma = dev->dma;
	int ret = 0;
	drm_dma_t __user *argp = (void __user *)data;
	drm_dma_t d;

	LOCK_TEST_WITH_RETURN( dev, filp );

	DRM_COPY_FROM_USER_IOCTL( d, argp, sizeof(d) );

	/* Please don't send us buffers.
	 */
	if ( d.send_count != 0 ) {
		DRM_ERROR( "Process %d trying to send %d buffers via drmDMA\n",
			   DRM_CURRENTPID, d.send_count );
		return DRM_ERR(EINVAL);
	}

	/* We'll send you buffers.
	 */
	if ( d.request_count < 0 || d.request_count > dma->buf_count ) {
		DRM_ERROR( "Process %d trying to get %d buffers (of %d max)\n",
			   DRM_CURRENTPID, d.request_count, dma->buf_count );
		return DRM_ERR(EINVAL);
	}

	d.granted_count = 0;

	if ( d.request_count ) {
		ret = r128_cce_get_buffers( filp, dev, &d );
	}

	DRM_COPY_TO_USER_IOCTL(argp, d, sizeof(d) );

	return ret;
}