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path: root/drivers/gpu/drm/nouveau/nouveau_notifier.c
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Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_notifier.c')
-rw-r--r--drivers/gpu/drm/nouveau/nouveau_notifier.c196
1 files changed, 196 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_notifier.c b/drivers/gpu/drm/nouveau/nouveau_notifier.c
new file mode 100644
index 0000000..6c66a34
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nouveau_notifier.c
@@ -0,0 +1,196 @@
+/*
+ * 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(struct nouveau_channel *chan)
+{
+ struct drm_device *dev = chan->dev;
+ struct nouveau_bo *ntfy = NULL;
+ int ret;
+
+ ret = nouveau_gem_new(dev, NULL, PAGE_SIZE, 0, nouveau_vram_notify ?
+ TTM_PL_FLAG_VRAM : TTM_PL_FLAG_TT,
+ 0, 0x0000, false, true, &ntfy);
+ if (ret)
+ return ret;
+
+ ret = nouveau_bo_pin(ntfy, TTM_PL_FLAG_VRAM);
+ if (ret)
+ goto out_err;
+
+ ret = nouveau_bo_map(ntfy);
+ if (ret)
+ goto out_err;
+
+ ret = nouveau_mem_init_heap(&chan->notifier_heap, 0, ntfy->bo.mem.size);
+ if (ret)
+ goto out_err;
+
+ chan->notifier_bo = ntfy;
+out_err:
+ if (ret) {
+ mutex_lock(&dev->struct_mutex);
+ drm_gem_object_unreference(ntfy->gem);
+ mutex_unlock(&dev->struct_mutex);
+ }
+
+ return ret;
+}
+
+void
+nouveau_notifier_takedown_channel(struct nouveau_channel *chan)
+{
+ struct drm_device *dev = chan->dev;
+
+ if (!chan->notifier_bo)
+ return;
+
+ nouveau_bo_unmap(chan->notifier_bo);
+ mutex_lock(&dev->struct_mutex);
+ nouveau_bo_unpin(chan->notifier_bo);
+ drm_gem_object_unreference(chan->notifier_bo->gem);
+ mutex_unlock(&dev->struct_mutex);
+ nouveau_mem_takedown(&chan->notifier_heap);
+}
+
+static void
+nouveau_notifier_gpuobj_dtor(struct drm_device *dev,
+ struct nouveau_gpuobj *gpuobj)
+{
+ NV_DEBUG(dev, "\n");
+
+ if (gpuobj->priv)
+ nouveau_mem_free_block(gpuobj->priv);
+}
+
+int
+nouveau_notifier_alloc(struct nouveau_channel *chan, uint32_t handle,
+ int size, uint32_t *b_offset)
+{
+ struct drm_device *dev = chan->dev;
+ struct drm_nouveau_private *dev_priv = dev->dev_private;
+ struct nouveau_gpuobj *nobj = NULL;
+ struct mem_block *mem;
+ uint32_t offset;
+ int target, ret;
+
+ if (!chan->notifier_heap) {
+ NV_ERROR(dev, "Channel %d doesn't have a notifier heap!\n",
+ chan->id);
+ return -EINVAL;
+ }
+
+ mem = nouveau_mem_alloc_block(chan->notifier_heap, size, 0,
+ (struct drm_file *)-2, 0);
+ if (!mem) {
+ NV_ERROR(dev, "Channel %d notifier block full\n", chan->id);
+ return -ENOMEM;
+ }
+
+ offset = chan->notifier_bo->bo.mem.mm_node->start << PAGE_SHIFT;
+ if (chan->notifier_bo->bo.mem.mem_type == TTM_PL_VRAM) {
+ target = NV_DMA_TARGET_VIDMEM;
+ } else
+ if (chan->notifier_bo->bo.mem.mem_type == TTM_PL_TT) {
+ if (dev_priv->gart_info.type == NOUVEAU_GART_SGDMA &&
+ dev_priv->card_type < NV_50) {
+ ret = nouveau_sgdma_get_page(dev, offset, &offset);
+ if (ret)
+ return ret;
+ target = NV_DMA_TARGET_PCI;
+ } else {
+ target = NV_DMA_TARGET_AGP;
+ }
+ } else {
+ NV_ERROR(dev, "Bad DMA target, mem_type %d!\n",
+ chan->notifier_bo->bo.mem.mem_type);
+ return -EINVAL;
+ }
+ offset += mem->start;
+
+ ret = nouveau_gpuobj_dma_new(chan, NV_CLASS_DMA_IN_MEMORY, offset,
+ mem->size, NV_DMA_ACCESS_RW, target,
+ &nobj);
+ if (ret) {
+ nouveau_mem_free_block(mem);
+ NV_ERROR(dev, "Error creating notifier ctxdma: %d\n", ret);
+ return ret;
+ }
+ nobj->dtor = nouveau_notifier_gpuobj_dtor;
+ nobj->priv = mem;
+
+ ret = nouveau_gpuobj_ref_add(dev, chan, handle, nobj, NULL);
+ if (ret) {
+ nouveau_gpuobj_del(dev, &nobj);
+ nouveau_mem_free_block(mem);
+ NV_ERROR(dev, "Error referencing notifier ctxdma: %d\n", ret);
+ return ret;
+ }
+
+ *b_offset = mem->start;
+ return 0;
+}
+
+int
+nouveau_notifier_offset(struct nouveau_gpuobj *nobj, uint32_t *poffset)
+{
+ if (!nobj || nobj->dtor != nouveau_notifier_gpuobj_dtor)
+ return -EINVAL;
+
+ if (poffset) {
+ struct mem_block *mem = nobj->priv;
+
+ if (*poffset >= mem->size)
+ return false;
+
+ *poffset += mem->start;
+ }
+
+ return 0;
+}
+
+int
+nouveau_ioctl_notifier_alloc(struct drm_device *dev, void *data,
+ struct drm_file *file_priv)
+{
+ struct drm_nouveau_notifierobj_alloc *na = data;
+ struct nouveau_channel *chan;
+ int ret;
+
+ NOUVEAU_CHECK_INITIALISED_WITH_RETURN;
+ NOUVEAU_GET_USER_CHANNEL_WITH_RETURN(na->channel, file_priv, chan);
+
+ ret = nouveau_notifier_alloc(chan, na->handle, na->size, &na->offset);
+ if (ret)
+ return ret;
+
+ return 0;
+}
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