Get r128 basically working: Hook up the driver's dma ioctl, use the proper

offset into the driver ioctl array, and don't make the ctx bitmap
    conditional.

bsd-core/drmP.h

@@ -607,6 +607,7 @@ struct drm_device {
 	int	(*postsetup)(struct drm_device *);
 	void	(*open_helper)(struct drm_device *, drm_file_t *);
 	void	(*release)(struct drm_device *, void *filp);
+	int	(*dma_ioctl)(DRM_IOCTL_ARGS);
 	void	(*dma_ready)(struct drm_device *);
 	int	(*dma_quiescent)(struct drm_device *);
 	int	(*dma_flush_block_and_flush)(struct drm_device *, int context,
@@ -646,7 +647,6 @@ struct drm_device {
 	unsigned use_irq :1;
 	unsigned use_vbl_irq :1;
 	unsigned use_mtrr :1;
-	unsigned use_ctxbitmap :1;
 	/* End of driver-config section */
 
 	char		  *unique;	/* Unique identifier: e.g., busid  */
@@ -882,6 +882,9 @@ int	drm_markbufs(DRM_IOCTL_ARGS);
 int	drm_freebufs(DRM_IOCTL_ARGS);
 int	drm_mapbufs(DRM_IOCTL_ARGS);
 
+/* DMA support (drm_dma.c) */
+int	drm_dma(DRM_IOCTL_ARGS);
+
 /* IRQ support (drm_irq.c) */
 int	drm_control(DRM_IOCTL_ARGS);
 int	drm_wait_vblank(DRM_IOCTL_ARGS);

bsd-core/drm_dma.c

@@ -130,3 +130,16 @@ void drm_reclaim_buffers(drm_device_t *dev, DRMFILE filp)
 		}
 	}
 }
+
+/* Call into the driver-specific DMA handler */
+int drm_dma(DRM_IOCTL_ARGS)
+{
+	DRM_DEVICE;
+
+	if (dev->dma_ioctl) {
+		return dev->dma_ioctl(kdev, cmd, data, flags, p, filp);
+	} else {
+		DRM_DEBUG("DMA ioctl on driver with no dma handler\n");
+		return EINVAL;
+	}
+}

bsd-core/drm_drv.c

@@ -93,7 +93,8 @@ static drm_ioctl_desc_t		  drm_ioctls[256] = {
 	[DRM_IOCTL_NR(DRM_IOCTL_INFO_BUFS)]     = { drm_infobufs,    1, 0 },
 	[DRM_IOCTL_NR(DRM_IOCTL_MAP_BUFS)]      = { drm_mapbufs,     1, 0 },
 	[DRM_IOCTL_NR(DRM_IOCTL_FREE_BUFS)]     = { drm_freebufs,    1, 0 },
-	/* The DRM_IOCTL_DMA ioctl should be defined by the driver. */
+	[DRM_IOCTL_NR(DRM_IOCTL_DMA)]           = { drm_dma,         1, 0 },
+
 	[DRM_IOCTL_NR(DRM_IOCTL_CONTROL)]       = { drm_control,     1, 1 },
 
 	[DRM_IOCTL_NR(DRM_IOCTL_AGP_ACQUIRE)]   = { drm_agp_acquire, 1, 1 },
@@ -552,13 +553,11 @@ static int drm_init(device_t nbdev)
 		}
 	}
 
-	if (dev->use_ctxbitmap) {
 	retcode = drm_ctxbitmap_init(dev);
 	if (retcode != 0) {
 		DRM_ERROR("Cannot allocate memory for context bitmap.\n");
 		goto error;
 	}
-	}
 	
 	DRM_INFO( "Initialized %s %d.%d.%d %s on minor %d\n",
 	  	dev->driver_name,
@@ -604,7 +603,6 @@ static void drm_cleanup(drm_device_t *dev)
 	destroy_dev(dev->devnode);
 #endif
 
-	if (dev->use_ctxbitmap)
 	drm_ctxbitmap_cleanup(dev);
 
 	if (dev->agp && dev->agp->mtrr) {
@@ -858,13 +856,23 @@ int drm_ioctl(struct cdev *kdev, u_long cmd, caddr_t data, int flags,
 #endif /* __NetBSD__ */
 	}
 
-	if (nr >= dev->max_driver_ioctl || IOCGROUP(cmd) != DRM_IOCTL_BASE)
+	if (IOCGROUP(cmd) != DRM_IOCTL_BASE) {
+		DRM_DEBUG("Bad ioctl group 0x%x\n", (int)IOCGROUP(cmd));
 		return EINVAL;
+	}
 
 	ioctl = &drm_ioctls[nr];
 	/* It's not a core DRM ioctl, try driver-specific. */
-	if (ioctl->func == NULL)
+	if (ioctl->func == NULL && nr >= DRM_COMMAND_BASE) {
+		/* The array entries begin at DRM_COMMAND_BASE ioctl nr */
+		nr -= DRM_COMMAND_BASE;
+		if (nr > dev->max_driver_ioctl) {
+			DRM_DEBUG("Bad driver ioctl number, 0x%x (of 0x%x)\n",
+			    nr, dev->max_driver_ioctl);
+			return EINVAL;
+		}
 		ioctl = &dev->driver_ioctls[nr];
+	}
 	func = ioctl->func;
 
 	if (func == NULL) {
@@ -877,6 +885,9 @@ int drm_ioctl(struct cdev *kdev, u_long cmd, caddr_t data, int flags,
 
 	retcode = func(kdev, cmd, data, flags, p, (void *)(uintptr_t)DRM_CURRENTPID);
 
+	if (retcode != 0)
+		DRM_DEBUG("    returning %d\n", retcode);
+
 	return DRM_ERR(retcode);
 }
 

bsd-core/r128_drv.c

@@ -54,6 +54,7 @@ static void r128_configure(drm_device_t *dev)
 	dev->irq_postinstall = r128_driver_irq_postinstall;
 	dev->irq_uninstall = r128_driver_irq_uninstall;
 	dev->irq_handler = r128_driver_irq_handler;
+	dev->dma_ioctl = r128_cce_buffers;
 	/* XXX dev->reclaim_buffers = drm_core_reclaim_buffers;*/
 	/* XXX dev->get_map_ofs = drm_core_get_map_ofs;
 	dev->get_reg_ofs = drm_core_get_reg_ofs;*/

bsd-core/radeon_drv.c

@@ -52,6 +52,7 @@ static void radeon_configure(drm_device_t *dev)
 	dev->irq_postinstall = radeon_driver_irq_postinstall;
 	dev->irq_uninstall = radeon_driver_irq_uninstall;
 	dev->irq_handler = radeon_driver_irq_handler;
+	dev->dma_ioctl = radeon_cp_buffers;
 	/* XXX dev->reclaim_buffers = drm_core_reclaim_buffers;*/
 	/* XXX dev->get_map_ofs = drm_core_get_map_ofs;
 	dev->get_reg_ofs = drm_core_get_reg_ofs;*/