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/*
* 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"
#include "nouveau_ramht.h"
int
nouveau_notifier_init_channel(struct nouveau_channel *chan)
{
struct drm_device *dev = chan->dev;
struct nouveau_bo *ntfy = NULL;
uint32_t flags;
int ret;
if (nouveau_vram_notify)
flags = TTM_PL_FLAG_VRAM;
else
flags = TTM_PL_FLAG_TT;
ret = nouveau_gem_new(dev, NULL, PAGE_SIZE, 0, flags,
0, 0x0000, false, true, &ntfy);
if (ret)
return ret;
ret = nouveau_bo_pin(ntfy, flags);
if (ret)
goto out_err;
ret = nouveau_bo_map(ntfy);
if (ret)
goto out_err;
ret = drm_mm_init(&chan->notifier_heap, 0, ntfy->bo.mem.size);
if (ret)
goto out_err;
chan->notifier_bo = ntfy;
out_err:
if (ret)
drm_gem_object_unreference_unlocked(ntfy->gem);
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);
mutex_unlock(&dev->struct_mutex);
drm_gem_object_unreference_unlocked(chan->notifier_bo->gem);
drm_mm_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)
drm_mm_put_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 nouveau_gpuobj *nobj = NULL;
struct drm_mm_node *mem;
uint32_t offset;
int target, ret;
mem = drm_mm_search_free(&chan->notifier_heap, size, 0, 0);
if (mem)
mem = drm_mm_get_block(mem, size, 0);
if (!mem) {
NV_ERROR(dev, "Channel %d notifier block full\n", chan->id);
return -ENOMEM;
}
if (chan->notifier_bo->bo.mem.mem_type == TTM_PL_VRAM)
target = NV_MEM_TARGET_VRAM;
else
target = NV_MEM_TARGET_GART;
offset = chan->notifier_bo->bo.mem.start << PAGE_SHIFT;
offset += mem->start;
ret = nouveau_gpuobj_dma_new(chan, NV_CLASS_DMA_IN_MEMORY, offset,
mem->size, NV_MEM_ACCESS_RW, target,
&nobj);
if (ret) {
drm_mm_put_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_ramht_insert(chan, handle, nobj);
nouveau_gpuobj_ref(NULL, &nobj);
if (ret) {
drm_mm_put_block(mem);
NV_ERROR(dev, "Error adding notifier to ramht: %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 drm_mm_node *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_private *dev_priv = dev->dev_private;
struct drm_nouveau_notifierobj_alloc *na = data;
struct nouveau_channel *chan;
int ret;
/* completely unnecessary for these chipsets... */
if (unlikely(dev_priv->card_type >= NV_C0))
return -EINVAL;
chan = nouveau_channel_get(dev, file_priv, na->channel);
if (IS_ERR(chan))
return PTR_ERR(chan);
ret = nouveau_notifier_alloc(chan, na->handle, na->size, &na->offset);
nouveau_channel_put(&chan);
return ret;
}
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