Merge branch 'master' into xgi-0-0-2

1 files changed, 151 insertions, 0 deletions

diff --git a/shared-core/nouveau_notifier.c b/shared-core/nouveau_notifier.c
new file mode 100644
index 00000000..7d892064
--- /dev/null
+++ b/shared-core/nouveau_notifier.c
@@ -0,0 +1,151 @@
+/*
+ * Copyright (C) 2007 Ben Skeggs.
+ *
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial
+ * portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+#include "drmP.h"
+#include "drm.h"
+#include "nouveau_drv.h"
+
+int
+nouveau_notifier_init_channel(drm_device_t *dev, int channel, DRMFILE filp)
+{
+	drm_nouveau_private_t *dev_priv = dev->dev_private;
+	struct nouveau_fifo *chan = dev_priv->fifos[channel];
+	int flags, ret;
+
+	/*TODO: PCI notifier blocks */
+	if (dev_priv->agp_heap)
+		flags = NOUVEAU_MEM_AGP | NOUVEAU_MEM_FB_ACCEPTABLE;
+	else
+		flags = NOUVEAU_MEM_FB;
+	flags |= NOUVEAU_MEM_MAPPED;
+
+	chan->notifier_block = nouveau_mem_alloc(dev, 0, PAGE_SIZE, flags,filp);
+	if (!chan->notifier_block)
+		return DRM_ERR(ENOMEM);
+
+	ret = nouveau_mem_init_heap(&chan->notifier_heap,
+				    0, chan->notifier_block->size);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+void
+nouveau_notifier_takedown_channel(drm_device_t *dev, int channel)
+{
+	drm_nouveau_private_t *dev_priv = dev->dev_private;
+	struct nouveau_fifo *chan = dev_priv->fifos[channel];
+
+	if (chan->notifier_block) {
+		nouveau_mem_free(dev, chan->notifier_block);
+		chan->notifier_block = NULL;
+	}
+
+	/*XXX: heap destroy */
+}
+
+int
+nouveau_notifier_alloc(drm_device_t *dev, int channel, uint32_t handle,
+		       int count, uint32_t *b_offset)
+{
+	drm_nouveau_private_t *dev_priv = dev->dev_private;
+	struct nouveau_fifo *chan = dev_priv->fifos[channel];
+	nouveau_gpuobj_t *nobj = NULL;
+	struct mem_block *mem;
+	uint32_t offset;
+	int target, ret;
+
+	if (!chan->notifier_heap) {
+		DRM_ERROR("Channel %d doesn't have a notifier heap!\n",
+			  channel);
+		return DRM_ERR(EINVAL);
+	}
+
+	mem = nouveau_mem_alloc_block(chan->notifier_heap, 32, 0, chan->filp);
+	if (!mem) {
+		DRM_ERROR("Channel %d notifier block full\n", channel);
+		return DRM_ERR(ENOMEM);
+	}
+	mem->flags = NOUVEAU_MEM_NOTIFIER;
+
+	offset = chan->notifier_block->start + mem->start;
+	if (chan->notifier_block->flags & NOUVEAU_MEM_FB) {
+		target = NV_DMA_TARGET_VIDMEM;
+	} else if (chan->notifier_block->flags & NOUVEAU_MEM_AGP) {
+		target = NV_DMA_TARGET_AGP;
+	} else {
+		DRM_ERROR("Bad DMA target, flags 0x%08x!\n",
+			  chan->notifier_block->flags);
+		return DRM_ERR(EINVAL);
+	}
+
+	if ((ret = nouveau_gpuobj_dma_new(dev, channel, NV_CLASS_DMA_IN_MEMORY,
+					  offset, mem->size,
+					  NV_DMA_ACCESS_RW, target, &nobj))) {
+		nouveau_mem_free_block(mem);
+		DRM_ERROR("Error creating notifier ctxdma: %d\n", ret);
+		return ret;
+	}
+
+	if ((ret = nouveau_gpuobj_ref_add(dev, channel, handle, nobj, NULL))) {
+		nouveau_gpuobj_del(dev, &nobj);
+		nouveau_mem_free_block(mem);
+		DRM_ERROR("Error referencing notifier ctxdma: %d\n", ret);
+		return ret;
+	}
+
+	*b_offset = mem->start;
+	return 0;
+}
+
+int
+nouveau_ioctl_notifier_alloc(DRM_IOCTL_ARGS)
+{
+	DRM_DEVICE;
+	drm_nouveau_notifier_alloc_t na;
+	int ret;
+
+	DRM_COPY_FROM_USER_IOCTL(na, (drm_nouveau_notifier_alloc_t __user*)data,
+				 sizeof(na));
+
+	if (!nouveau_fifo_owner(dev, filp, na.channel)) {
+		DRM_ERROR("pid %d doesn't own channel %d\n",
+			  DRM_CURRENTPID, na.channel);
+		return DRM_ERR(EPERM);
+	}
+
+	ret = nouveau_notifier_alloc(dev, na.channel, na.handle,
+				     na.count, &na.offset);
+	if (ret)
+		return ret;
+
+	DRM_COPY_TO_USER_IOCTL((drm_nouveau_notifier_alloc_t __user*)data,
+			       na, sizeof(na));
+	return 0;
+}
+