Merge branch 'modesetting-gem' of git+ssh://agd5f@git.freedesktop.org/git/mesa/drm...

[android-x86/external-libdrm.git] / shared-core / nouveau_notifier.c

/*
 * 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;
        int flags, ret;

        flags = (NOUVEAU_MEM_PCI | NOUVEAU_MEM_MAPPED |
                 NOUVEAU_MEM_FB_ACCEPTABLE);

        chan->notifier_block = nouveau_mem_alloc(dev, 0, PAGE_SIZE, flags,
                                                 (struct drm_file *)-2);
        if (!chan->notifier_block)
                return -ENOMEM;
        DRM_DEBUG("Allocated notifier block in 0x%08x\n",
                  chan->notifier_block->flags);

        ret = nouveau_mem_init_heap(&chan->notifier_heap,
                                    0, chan->notifier_block->size);
        if (ret)
                return ret;

        return 0;
}

void
nouveau_notifier_takedown_channel(struct nouveau_channel *chan)
{
        struct drm_device *dev = chan->dev;

        if (chan->notifier_block) {
                nouveau_mem_free(dev, chan->notifier_block);
                chan->notifier_block = NULL;
        }

        nouveau_mem_takedown(&chan->notifier_heap);
}

static void
nouveau_notifier_gpuobj_dtor(struct drm_device *dev,
                             struct nouveau_gpuobj *gpuobj)
{
        DRM_DEBUG("\n");

        if (gpuobj->priv)
                nouveau_mem_free_block(gpuobj->priv);
}

int
nouveau_notifier_alloc(struct nouveau_channel *chan, uint32_t handle,
                       int count, 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) {
                DRM_ERROR("Channel %d doesn't have a notifier heap!\n",
                          chan->id);
                return -EINVAL;
        }

        mem = nouveau_mem_alloc_block(chan->notifier_heap, count*32, 0,
                                      (struct drm_file *)-2, 0);
        if (!mem) {
                DRM_ERROR("Channel %d notifier block full\n", chan->id);
                return -ENOMEM;
        }
        mem->flags = NOUVEAU_MEM_NOTIFIER;

        offset = chan->notifier_block->start;
        if (chan->notifier_block->flags & NOUVEAU_MEM_FB) {
                target = NV_DMA_TARGET_VIDMEM;
        } else
        if (chan->notifier_block->flags & NOUVEAU_MEM_AGP) {
                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
        if (chan->notifier_block->flags & NOUVEAU_MEM_PCI) {
                target = NV_DMA_TARGET_PCI_NONLINEAR;
        } else {
                DRM_ERROR("Bad DMA target, flags 0x%08x!\n",
                          chan->notifier_block->flags);
                return -EINVAL;
        }
        offset += mem->start;

        if ((ret = nouveau_gpuobj_dma_new(chan, 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;
        }
        nobj->dtor   = nouveau_notifier_gpuobj_dtor;
        nobj->priv   = mem;

        if ((ret = nouveau_gpuobj_ref_add(dev, chan, 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(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->count, &na->offset);
        if (ret)
                return ret;

        return 0;
}